Sony HCD-GX255 Service Manual
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Sony HCD-GX255 Service Manual

Compact disc deck receiver
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HCD-GX255/RG170/RG470
SERVICE MANUAL
Ver. 1.2 2005.09
• HCD-GX255 is the amplifier, CD player, tape
deck and tuner section in MHC-GX255.
• HCD-RG170 is the amplifier, CD player, tape
deck and tuner section in MHC-RG170.
• HCD-RG470 is the amplifier, CD player, tape
deck and tuner section in MHC-RG470.
Model Name Using Similar Mechanism
CD Mechanism Type
CD
Section
Base Unit Name
Optical Pick-up Block Name
TAPE
Model Name Using Similar Mechanism
Section
Tape Transport Mechanism Type
• Abbreviation
E2
: 120V AC area in E model
E51
: Chilean and Peruvian models
Amplifier section
Canadian model:
HCD-GX255
Continuous RMS power output (reference):
65 + 65 watts (6 ohms at
1 kHz, 10% THD)
Total harmonic distortion less than 0.07% (6 ohms at
1 kHz, 40 W)
European and Russian models:
HCD-RG470
DIN power output (rated): 110 + 110 watts (6 ohms at
1 kHz, DIN)
Continuous RMS power output (reference):
140 + 140 watts (6 ohms at
1 kHz, 10% THD)
Music power output (reference):
280 + 280 watts (6 ohms at
1 kHz, 10% THD)
HCD-RG170
DIN power output (rated): 20 + 20 watts (6 ohms at
1 kHz, DIN)
Continuous RMS power output (reference):
25 + 25 watts (6 ohms at
1 kHz, 10% THD)
Sony Corporation
9-879-612-03
Personal Audio Group
2005I05-1
Published by Sony Engineering Corporation
© 2005.09
Photo: HCD-GX255
NEW
CDM74KFS-F1BD81C (Except Mexican model) or
CDM74KFS-K6BD83S (Canadian, AEP, East European, Russian, E2, E51 models)/
CDM74KFS-F1BD84 (Mexican model)
BU-F1BD81C (Except Mexican model) or
BU-K6BD83S-WOD (Canadian, AEP, East European, Russian, E2, E51 models)/
BU-F1BD84 (Mexican model)
KSM-215DCP or KSM-213DCP
HCD-GX355/RG270
CWM43FF13
SPECIFICATIONS
Music power output (reference):
50 + 50 watts (6 ohms at
1 kHz, 10% THD)
Other models:
HCD-RG470
The following measured at AC 120, 127, 220, 240 V
50/60 Hz
DIN power output (rated): 130 + 130 watts (6 ohms at
1 kHz, DIN)
Continuous RMS power output (reference):
160 + 160 watts (6 ohms at
1 kHz, 10% THD)
HCD-RG170
The following measured at AC 120, 127, 220, 240 V
50/60 Hz
DIN power output (rated): 50 + 50 watts (6 ohms at
1 kHz, DIN)
Continuous RMS power output (reference):
65 + 65 watts (6 ohms at
1 kHz, 10% THD)
COMPACT DISC DECK RECEIVER
Canadian Model
HCD-GX255
AEP Model
E Model
HCD-RG170/RG470
Australian Model
HCD-RG170
Inputs
AUDIO IN (stereo mini jack):
voltage 250 mV,
impedance 47 kilohms
MIC (phone jack) (Latin American model only):
sensitivity 1 mV,
impedance 10 kilohms
Outputs
PHONES (stereo mini jack):
accepts headphones of
8 ohms or more
VIDEO OUT (phono jack) (Mexican model only):
max. output level 1Vp-p,
unbalanced, Sync
negative, load impedance
75 ohms
SPEAKER:
accepts impedance of 6 to
16 ohms
– Continued on next page –

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Summary of Contents for Sony HCD-GX255

  • Page 1 E Model HCD-RG170/RG470 Australian Model HCD-RG170 • HCD-GX255 is the amplifier, CD player, tape deck and tuner section in MHC-GX255. • HCD-RG170 is the amplifier, CD player, tape deck and tuner section in MHC-RG170. • HCD-RG470 is the amplifier, CD player, tape Photo: HCD-GX255 deck and tuner section in MHC-RG470.
  • Page 2 230 − 240V AC, 50/60 Hz Recording system 4-track 2-channel, stereo Adjustable with voltage 50 − 13,000 Hz (±3 dB), Frequency response selector using Sony TYPE I Power consumption cassettes Canadian model: Tuner section HCD-GX255: 110 watts European and Russian models:...
  • Page 3 FONCTIONNEMENT. NE REMPLACER CES COM- POSANTS • Usable with ordinary solder QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT It is best to use only unleaded solder but unleaded solder may DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.

  • Page 4: Table Of Contents

    HCD-GX255/RG170/RG470 TABLE OF CONTENTS SERVICING NOTES 6-24. Schematic Diagram – POWER Board – ..........5 (RG470: E2, E51, AR, MX) ..........45 6-25. Printed Wiring Boards GENERAL ..............6 – AUDIO, MIC, HEADPHONE Boards – ...... 46 6-26. Schematic Diagram DISASSEMBLY –...

  • Page 5: Servicing Notes

    HCD-GX255/RG170/RG470 SECTION 1 SERVICING NOTES • MODEL IDENTIFICATION NOTES ON HANDLING THE OPTICAL PICK-UP – Back Panel – BLOCK OR BASE UNIT Model number label The laser diode in the optical pick-up block may suffer electrostatic break-down because of the potential difference generated by the charged electrostatic load, etc.

  • Page 6: General

    HCD-GX255/RG170/RG470 SECTION 2 This section is extracted from instruction manual. GENERAL • Location of Controls Main unit ALPHABETICAL ORDER BUTTON DESCRIPTIO ?/1 (power) 1 A – O P – Z X (pause) qs ALBUM +/− qs P FILE 4 x (stop) qs AUDIO IN wl PHONES jack w;...

  • Page 7: Remote Control

    HCD-GX255/RG170/RG470 Remote control ALPHABETICAL ORDER BUTTON DESCRIPT ?/1 (power) 1 A – E F – Z m/M (rewind/fast forward) ALBUM + qa FM MODE 4 ALBUM − qd FUNCTION 6 N (play) 8 CD qk PLAY MODE w; X (pause) 8...

  • Page 8: Disassembly

    HCD-GX255/RG170/RG470 SECTION 3 DISASSEMBLY • This set can be disassembled in the order shown below. 3-1. DISASSEMBLY FLOW 3-2. CASE (TOP) (Page 9) 3-3. DOOR (CD) (Page 9) 3-4. FRONT PANEL SECTION (Page 10) 3-6. CD MECHANISM DECK 3-5. MECHANICAL DECK...

  • Page 9: Case (Top)

    HCD-GX255/RG170/RG470 Note: Follow the disassembly procedure in the numerical order given. 3-2. CASE (TOP) 0 case (top) 5 two screws (B3) 6 case (side-R) 7 two screws (B3) 2 two screws (B3) 4 three screws (case 3 TP2) 3 case (side-R)

  • Page 10: Front Panel Section

    HCD-GX255/RG170/RG470 3-4. FRONT PANEL SECTION • Abbreviation AR : Argentina model E2 : 120V AC Area in E model E51 : Chilean and Peruvian models MX : Mexican model 1 connector (CN061) (E2, E51, AR, MX) 5 connector (CN066) 8 screw (B3)

  • Page 11: Cd Mechanism Deck

    HCD-GX255/RG170/RG470 3-6. CD MECHANISM DECK (CDM74KFS-F1BD81C (EXCEPT MX MODEL)/CDM74KFS-F1BD84 (MX MODEL)) 7 CD mechanism deck (CDM74KFS-F1BD81C (except MX)/CDM74KFS-F1BD84 (MX)) (MX) 6 connector (CN1004) 1 three screws (B3) (MX) 5 wire (flat type) (13 core) (CN331) • Abbreviation MX : Mexican model...

  • Page 12: Main Board

    HCD-GX255/RG170/RG470 3-8. MAIN BOARD 4 connector (CN441) 5 MAIN board MAIN board 1 connector (CN907) 2 connector 3 two screws (B3) (CN905) 3-9. BD BOARD/CD BOARD 2 screw (+BVTP 2.6) • Abbreviation MX : Mexican model 5 BD board (MX)/...

  • Page 13: Driver Board, Sw Board

    HCD-GX255/RG170/RG470 3-10. DRIVER BOARD, SW BOARD 1 two screws (+BTTP (M2.6)) 3 connector 4p (CN703) 4 DRIVER board 5 screw (+BTTP (M2.6)) 6 SW board 2 wire (flat type) 5p (CN702) 3-11. OPTICAL PICK-UP BLOCK (KSM-215DCP) • Abbreviation MX : Mexican model 1 floating screw (+PTPWH M2.6)

  • Page 14: Sensor Board

    HCD-GX255/RG170/RG470 3-12. SENSOR BOARD 1 floating screw (+PTPWH M2.6) 2 t ray 8 s crew (+BTTP (M2.6)) 3 b elt (table) 0 SENSOR board 4 floating screw (+PTPWH M2.6) 5 p ulley (table) 6 floating screw 9 connector (+PTPWH M2.6)

  • Page 15: Motor (Ld) Board

    HCD-GX255/RG170/RG470 3-14. MOTOR (LD) BOARD 2 two screws (+BTTP (M2.6)) 4 Remove the two solderings of motor. 3 MOTOR (LD) board 5 l oading motor assy (M751) 1 b elt (loading)

  • Page 16: Test Mode

    HCD-GX255/RG170/RG470 SECTION 4 TEST MODE MC COLD RESET AMP TEST MODE The cold reset clears all data including preset data stored in the This mode is used to display the parameter of amplifier IC and RAM to initial conditions. Execute this mode when returning the display the VACS status.
  • Page 17 HCD-GX255/RG170/RG470 AGING MODE 3. Tape Deck Section The sequence during the aging mode is following as below. This mode can be used for operation check of CD section and tape If an error occurred, stop display that step. deck section.
  • Page 18 HCD-GX255/RG170/RG470 MC TEST MODE 1. Mechanism Deck Error Code Mode When this mode is entered, mechanism deck error code is displayed This mode is used to check operations of microprocessor. with the 10-character format on the fluorescent indicator tube. Procedure: 1.
  • Page 19 HCD-GX255/RG170/RG470 The 7th and 8th digit from the left indicates: The 5th and 6th digit from the left indicates: (Motor status display) (Error step display) The 7th and 8th digit from the left indicates which motor output The 5th and 6th digit from the left indicates which processing when status when an error occurred is indicated.

  • Page 20: Electrical Adjustment

    HCD-GX255/RG170/RG470 SECTION 5 ELECTRICAL ADJUSTMENTS CD SECTION RF signal waveform VOLT/DIV : 200mV Note: TIME/DIV : 500ns 1. CD Block is basically designed to operate without adjustment. Therefore, check each item in order given. 2. Use YEDS-18 (3-702-101-01) unless otherwise indicated.

  • Page 21: Block Diagram - Cd Servo Section

    HCD-GX255/RG170/RG470 SECTION 6 DIAGRAMS 6-1. BLOCK DIAGRAM – CD SERVO Section – FILTER CD DSP XTSL IC101 (1/2) (EXCEPT MX) XTAO IC101 (1/2) (MX) X171 CLOCK 51 53 50 52 DETECTOR XTAI CD +3V 16.9344MHz GENERATOR XTACN CD-L RFACI AOUT1...

  • Page 22: Block Diagram - Audio/Video Section

    HCD-GX255/RG170/RG470 6-2. BLOCK DIAGRAM – AUDIO/VIDEO Section – (MX) VR801 MIC LEVEL (MX) JK801 CD GRAPHICS MIC AMP MIC AMP DECODER MIC 1 IC801 (1/2) IC801 (2/2) IC1001 MUTING (MX) J803 SBSO VIDEO AMP Q801 3 DATA VOUT SCHMIT IC1006...

  • Page 23: Block Diagram - Amp Section

    HCD-GX255/RG170/RG470 6-3. BLOCK DIAGRAM – AMP Section – HP IN (Page 22) DBFB J701 R-CH (Page 22) R-CH PHONES IC441 (GX255/RG170) (RG170: AEP, EE, RU) IC441 (RG470: AEP, EE, RU) IC441 (RG470: E2, E51, AR, MX) JK441 BUFFER VOL OUT1...

  • Page 24: Block Diagram - Panel, Power Supply Section

    HCD-GX255/RG170/RG470 6-4. BLOCK DIAGRAM – PANEL, POWER SUPPLY Section – SYSTEM CONTROLLER IC901 (4/4) (SUFFIX-11) • Abbreviation IC901 (4/4) (SUFFIX-12) AR : Argentina model (MX) E2 : 120V AC Area in E model E3 : 240V AC Area in E model...
  • Page 25 HCD-GX255/RG170/RG470 • Note For Printed Wiring Boards and Schematic Diagrams • Circuit Boards Location Note on Printed Wiring Board: Note on Schematic Diagram: CD-G board (MX) • X : parts extracted from the component side. • All capacitors are in µF unless otherwise noted. (p: pF) •...

  • Page 26: Printed Wiring Board - Cd Board - (Except Mx Model)

    HCD-GX255/RG170/RG470 • See page 25 for Circuit Boards Location. 6-5. PRINTED WIRING BOARD – CD Board – (Except MX model) : Uses unleaded solder. CD BOARD CD BOARD M101 (SPINDLE) (CONDUCTOR SIDE) (COMPONENT SIDE) IC303 S101 (LIMIT) C302 C303 C305...

  • Page 27: Schematic Diagram - Cd Board - (Except Mx Model)

    HCD-GX255/RG170/RG470 • See page 60 for Waveforms. • See page 61 for IC Block Diagrams. 6-6. SCHEMATIC DIAGRAM – CD Board – (Except MX model) C131 100p TP423 IOP1 C142 1500p C134 C125 R131 R121 R143 C151 TP10 R203 C143 3.3k...

  • Page 28: Printed Wiring Board - Bd Board - (Mx Model)

    HCD-GX255/RG170/RG470 • See page 25 for Circuit Boards Location. 6-7. PRINTED WIRING BOARD – BD Board – (MX model only) : Uses unleaded solder. BD BOARD M101 (COMPONENT SIDE) BD BOARD (SPINDLE) S101 (CONDUCTOR SIDE) (LIMIT) C302 IC303 C305 C303...

  • Page 29: Schematic Diagram - Bd Board - (Mx Model)

    HCD-GX255/RG170/RG470 • See page 60 for Waveforms. • See page 61 for IC Block Diagrams. 6-8. SCHEMATIC DIAGRAM – BD Board – (MX model) C131 100p TP423 IOP1 C142 1500p C134 C125 R131 R121 R143 C151 TP10 R203 C143 3.3k...

  • Page 30: Printed Wiring Boards - Changer Section

    HCD-GX255/RG170/RG470 • See page 25 for Circuit Boards Location. 6-9. PRINTED WIRING BOARDS – CHANGER Section – : Uses unleaded solder. SENSOR BOARD SW BOARD CN751 (SUFFIX-11) (SUFFIX-12) IC731 S751 OPEN/CLOSE MAIN BOARD MAIN BOARD DETECT CN391 CN391 (Page 32)

  • Page 31: Schemtic Diagram - Changer Setion

    HCD-GX255/RG170/RG470 • See page 61 for IC Block Diagrams. 6-10. SCHEMATIC DIAGRAM – CHANGER Section – LOADING MOTOR DRIVE IC701 BA6956AN R702 R701 CN721 CN704 LM-2 LM-2 D701 M751 C751 LM-1 LM-1 MTZJ-T-77 0.01 (LOADING) 5.1A S711 DISC TRAY ADDRESS DETECT...

  • Page 32: Printed Wiring Board - Main Board - (Suffix-11)

    HCD-GX255/RG170/RG470 • See page 25 for Circuit Boards Location. 6-11. PRINTED WIRING BOARD – MAIN Board – (Suffix-11) : Uses unleaded solder. • Semiconductor (EXCEPT MX) (MX) BD BOARD CD-G BOARD Location CD BOARD DRIVER BOARD CN201 CN1001 CN201 CN701...

  • Page 33: Schematic Diagram - Main Board (1/3) - (Suffix-11)

    HCD-GX255/RG170/RG470 • See page 60 for Waveforms. • See page 71 for IC Pin Function Description. 6-12. SCHEMATIC DIAGRAM – MAIN Board (1/3) – (Suffix-11) (1/3) R1971 (E2,E51,AR) R1972 (CND,E2,E51,AR) R1973 (EA,MX) R1974 (EXCEPT E3,EA,AUS) R1975 CN991 R1977 (GX255/RG170) (MX)

  • Page 34: Schematic Diagram - Main Board (2/3) - (Suffix-11)

    HCD-GX255/RG170/RG470 • See page 60 for Waveform. • See page 61 for IC Block Diagram. 6-13. SCHEMATIC DIAGRAM – MAIN Board (2/3) – (Suffix-11) (Page 33) (2/3) Q111,112 BAND-PASS FILTER (E2,E51,AR,MX) C114 (Page 47) CN066 R107 R108 Q112 R116 R106...

  • Page 35: Schematic Diagram - Main Board (3/3) - (Suffix-11)

    HCD-GX255/RG170/RG470 6-14. SCHEMATIC DIAGRAM – MAIN Board (3/3) – (Suffix-11) (Page 33) (3/3) CN381 ANTENNA R384 T-MU TUNER-R TU-R FM 75Ω COAXIAL TUNER-L TU-L FM/AM ∗R251,252 STEREO T-ST TUNER PACK (RG470) TUNED T-SD SUPPLIED WITH (GX255/RG170) THE ASSEMBLED C259 BLOCK...

  • Page 36: Printed Wiring Board - Main Board - (Suffix-12)

    HCD-GX255/RG170/RG470 • See page 25 for Circuit Boards Location. 6-15. PRINTED WIRING BOARD – MAIN Board – (Suffix-12) : Uses unleaded solder. • Semiconductor (EXCEPT MX) (MX) Location CD BOARD BD BOARD CD-G BOARD DRIVER BOARD CN201 CN1001 CN201 CN701...

  • Page 37: Schematic Diagram - Main Board (1/3) - (Suffix-12)

    HCD-GX255/RG170/RG470 • See page 60 for Waveforms. • See page 71 for IC Pin Function Description. 6-16. SCHEMATIC DIAGRAM – MAIN Board (1/3) – (Suffix-12) (1/3) TU-DATA TUNED STEREO R1971 (AEP,EE,E2,E51,AR) R1972 (CND,AEP,EE,RU,E2,E51,AR) R387 R388 R389 ∗ ∗ ∗ R1973...

  • Page 38: Schematic Diagram - Main Board (2/3) - (Suffix-12)

    HCD-GX255/RG170/RG470 • See page 60 for Waveform. • See page 61 for IC Block Diagram. 6-17. SCHEMATIC DIAGRAM – MAIN Board (2/3) – (Suffix-12) (Page 37) (2/3) Q111,112 BAND-PASS FILTER C185 C196 C215 (E2,E51,AR,MX) C114 (Page 47) CN066 (AEP,EE,RU) 1000p...

  • Page 39: Schematic Diagram - Main Board (3/3) - (Suffix-12)

    HCD-GX255/RG170/RG470 6-18. SCHEMATIC DIAGRAM – MAIN Board (3/3) – (Suffix-12) (Page 37) CN381 (3/3) 11P(EXCEPT AEP,EE) 15P(AEP,EE) RDS DATA R386 RDS CLK R385 ANTENNA R390 JW040 (AEP,EE) +3.3V R391 ∗ TU-MUTE R384 T-MU FM 75Ω ∗C253,254 TUNER-R TU-R COAXIAL FM/AM...

  • Page 40: Printed Wiring Board - Power Board - (Gx255/Rg170)

    HCD-GX255/RG170/RG470 • See page 25 for Circuit Boards Location. 6-19. PRINTED WIRING BOARD – POWER Board – (GX255/RG170) : Uses unleaded solder. JK441 SPEAKER IMPEDANCE USE 6 – 16Ω – – POWER BOARD (AEP, EE, RU) (AEP, EE, RU) (EXCEPT AEP, EE, RU)

  • Page 41: Schematic Diagram -Power Board - (Gx255/Rg170)

    HCD-GX255/RG170/RG470 6-20. SCHEMATIC DIAGRAM – POWER Board – (GX255/RG170) R447 (EXCEPT AEP,EE,RU) JW422 C441 R441 POWER AMP JW401 2.2k L441 R461 R411 R413 R412 IC441(1/2) ∗ L442 JR441 C445 100p R462 R414 R497 R466 R465 Q481,482 Q483,484 R469 R451 100k...

  • Page 42: Printed Wiring Board - Power Board - (Rg470: Aep, Ee, Ru)

    HCD-GX255/RG170/RG470 • See page 25 for Circuit Boards Location. : Uses unleaded solder. 6-21. PRINTED WIRING BOARD – POWER Board – (RG470: AEP, EE, RU) JK441 SPEAKER IMPEDANCE USE 6 – 16Ω – – POWER BOARD (CHASSIS) 11, 21 MAIN...

  • Page 43: Schematic Diagram - Power Board - (Rg470: Aep, Ee, Ru)

    HCD-GX255/RG170/RG470 6-22. SCHEMATIC DIAGRAM – POWER Board – (RG470: AEP, EE, RU) R447 JW422 C441 R441 JW401 2.2k L441 R461 R411 R413 R412 IC441(1/2) STK403-130 L442 JR441 C445 100p R462 R414 R497 R466 R465 Q481,482 Q483,484 R451 100k 100k R416 R415 0.22...

  • Page 44: Printed Wiring Board - Power Board - (Rg470: E2, E51, Ar, Mx)

    HCD-GX255/RG170/RG470 • See page 25 for Circuit Boards Location. 6-23. PRINTED WIRING BOARD – POWER Board – (RG470: E2, E51, AR, MX) : Uses unleaded solder. JK441 SPEAKER IMPEDANCE USE 6 – 16Ω – – POWER BOARD (CHASSIS) (SUFFIX-11) MAIN BOARD...

  • Page 45: Schematic Diagram - Power Board - (Rg470: E2, E51, Ar, Mx)

    HCD-GX255/RG170/RG470 6-24. SCHEMATIC DIAGRAM – POWER Board – (RG470: E2, E51, AR, MX) R467 C461 2.2k 47 100V L441 D445 UDZS-16B R496 R461 R411 R449 SP(L) 0.22 R413 R412 RY441 R474 JK441 2.2k SP GND Q491 JR441 2SA2026 JW403 SPEAKER...

  • Page 46: Printed Wiring Boards - Audio, Mic, Headphone Boards

    HCD-GX255/RG170/RG470 • See page 25 for Circuit Boards Location. 6-25. PRINTED WIRING BOARDS – AUDIO IN, MIC, HEADPHONE Boards – : Uses unleaded solder. (SUFFIX-11) MAIN BOARD MAIN BOARD (Page 32) (Page 36) MIC BOARD CN066 CN066 MAIN BOARD CN065...

  • Page 47: Schematic Diagram - Audio, Mic, Headphone Boards

    HCD-GX255/RG170/RG470 • See page 61 for IC Block Diagrams. 6-26. SCHEMATIC DIAGRAM – AUDIO IN, MIC, HEADPHONE Boards – (E2,E51,AR,MX) R856 C863 C862 (MX) 0.047 C865 4700p VR851 (E2,E51,AR) C870 C869 JR801 R859 (E2,E51,AR) ECHO LEVEL C867 MIC AMP 0.047...

  • Page 48: Printed Wiring Boards - Cd-G Section - (Mx Model Only)

    HCD-GX255/RG170/RG470 • See page 25 for Circuit Boards Location. 6-27. PRINTED WIRING BOARDS – CD-G Section – (MX model only) : Uses unleaded solder. CD-G BOARD (COMPONENT SIDE) CD-G BOARD (CONDUCTOR SIDE) J803 VIDEO VIDEO OUT BOARD FB1001 R1031 C1019...

  • Page 49: Schematic Diagram - Cd-G Section - (Mx Model Only)

    HCD-GX255/RG170/RG470 • See page 60 for Waveforms. • See page 61 for IC Block Diagrams. • See page 71 for IC Pin Function Description. 6-28. SCHEMATIC DIAGRAM – CD-G Section – (MX model only) SCOR WFCK SCHMIT TRIGGER IC1005 SN74AHCT04NSR...

  • Page 50: Printed Wiring Board - Panel Section (1/2)

    HCD-GX255/RG170/RG470 • See page 25 for Circuit Boards Location. 6-29. PRINTED WIRING BOARD – PANEL Section (1/2) – : Uses unleaded solder. PANEL BOARD R627 JW605 R628 C621 C622 R625 JW629 JW636 JW637 R607 R621 R622 D611 JW628 JW635 JW638...

  • Page 51: Printed Wiring Board - Panel Section (2/2)

    HCD-GX255/RG170/RG470 • See page 25 for Circuit Boards Location. 6-30. PRINTED WIRING BOARD – PANEL Section (2/2) – : Uses unleaded solder. VOL BOARD S638 EQ BAND S626 S625 S637 ROTARY ENCODER MASTER VOLUME S624 ALBUM + S636 l – EQ + L –...

  • Page 52: Schematic Diagram - Panel Section (1/2)

    HCD-GX255/RG170/RG470 • See page 60 for Waveform. • See page 71 for IC Pin Function Description. 6-31. SCHEMATIC DIAGRAM – PANEL Section (1/2) – (1/2) FL701 FLUORESCENT INDICATOR TUBE REMOTE CONTROL RECEIVER IC610 RPM7240-H18 R619 R620 C631 C621 R622 R625...

  • Page 53: Schematic Diagram - Panel Section (2/2)

    HCD-GX255/RG170/RG470 6-32. SCHEMATIC DIAGRAM – PANEL Section (2/2) – (Page 52) (2/2) R652 R650 R667 R666 R665 R664 R663 R662 R660 2.2k 4.7k 4.7k 2.2k 2.2k S616 S615 S614 S613 S612 S611 R651 R661 S602 S601 S617 S660 MASTER VOLUME...

  • Page 54: Printed Wiring Boards - Trans Section - (Gx255/Rg170)

    HCD-GX255/RG170/RG470 6-33. PRINTED WIRING BOARDS – TRANS Section – (GX255/RG170) • See page 25 for Circuit Boards Location. : Uses unleaded solder. • Semiconductor Location Ref. No. Location SUB TRANS BOARD D901 (E2, E3, E51, EA) D902 D903 D904 D905...

  • Page 55: Schematic Diagram - Trans Section - (Gx255/Rg170)

    HCD-GX255/RG170/RG470 6-34. SCHEMATIC DIAGRAM – TRANS Section – (GX255/RG170) PT901 MAIN POWER ∗F904,905 TRANSFORMER (AUS) CN905 T4A 250V(AEP,EE,RU) F904 T6.3A 250V(EXCEPT AEP,EE,RU) ∗ JW907 CN904 EXCEPT E2, CN903 (E2,E3,E51,EA) E3,E51,EA EXCEPT E2, AEP,EE, EXCEPT E2, E3,E51,EA JW902 JW901 RU,AR (E2,E3,E51,EA)

  • Page 56: Printed Wiring Boards - Trans Section - (Rg470: Aep, Ee, Ru)

    HCD-GX255/RG170/RG470 6-35. PRINTED WIRING BOARDS – TRANS Section – (RG470: AEP, EE, RU) • See page 25 for Circuit Boards Location. : Uses unleaded solder. • Semiconductor Location Ref. No. Location D901 D902 SUB TRANS BOARD D903 D904 D905 D906...

  • Page 57: Schematic Diagram - Trans Section - (Rg470: Aep, Ee, Ru)

    HCD-GX255/RG170/RG470 6-36. SCHEMATIC DIAGRAM – TRANS Section – (RG470: AEP, EE, RU) PT901 MAIN POWER TRANSFORMER CN905 F904 250V CN904 CN903 (Page 43) NEUTRAL F905 JW908 LIVE 250V CN907 F906 JW902 T3.15A RY901 250V PT902 SUB POWER TRANSFORMER ∗ JW903 F907 T3.15A...

  • Page 58: Printed Wiring Boards - Trans Section - (Rg470: E2, E51, Ar, Mx)

    HCD-GX255/RG170/RG470 6-37. PRINTED WIRING BOARDS – TRANS Section – (RG470: E2, E51, AR, MX) • See page 25 for Circuit Boards Location. : Uses unleaded solder. • Semiconductor Location Ref. No. Location (E2, E51) SUB TRANS BOARD D901 D902 D903...

  • Page 59: Schematic Diagram - Trans Section - (Rg470: E2, E51, Ar, Mx)

    HCD-GX255/RG170/RG470 6-38. SCHEMATIC DIAGRAM – TRANS Section – (RG470: E2, E51, AR, MX) PT901 MAIN POWER F908 TRANSFORMER 250V CN905 AC-VH AC-VL F904 CN904 (AR,MX) T6.3A 250V (AR,MX) JW902 (E2,E51) AC-VL AC-VH (AR) NEUTRAL F905 T6.3A 250V (Page 45) JW908...
  • Page 60 HCD-GX255/RG170/RG470 • Waveforms – CD-G Board – – PANEL Board – – CD Board – (Except MX model) – BD Board – (MX model only) – MAIN Board – IC1001 y; (XO1) IC601 4 (X2) IC101 yd (LRCK) IC101 yd (LRCK) IC901 qa (XCOUT (32.768KHZ))
  • Page 61 HCD-GX255/RG170/RG470 • IC Block Diagrams – CD Board – IC101 CXD3059AR 116 115 114 112 111 110 109 103 102 101 100 119 118 CPU INTERFACE SERVO INTERFACE 90 RMUT 89 IOVDD0 88 NC 87 AVDD2 86 AOUT2 COVERTER 85 VREFR...
  • Page 62 HCD-GX255/RG170/RG470 IC251 BA5947FM-E2 MUTING + – INTERFACE LEVEL SHIFT INTERFACE INTERFACE VREF...
  • Page 63 HCD-GX255/RG170/RG470 IC301 TC94A34FG-002 Timing Generator VDDP PO5/AD5 /RESET PO6/AD6 STANDBY PO7AD7 /MICS /MILP MIDIO AD10 VDDT /MICK /MIACK/ SRMSTB AD16 VDDT VDDM PO8/AD11 SDO0 PO9/AD12 /CCE/ PO10/ BCKO AD13 BUCK/ PO11/ LRCKO AD14 SDO3/ SDI0 Interrupt Timer Control Switch General...
  • Page 64 HCD-GX255/RG170/RG470 IC303 BH15FB1WG THERMAL PROTECTION OVER CURRENT PROTECTION VOLTAGE CONTROL REFERENCE BLOCK...
  • Page 65 HCD-GX255/RG170/RG470 – BD Board – IC101 CXD3059AR 119 118 116 115 114 112 111 110 109 103 102 101 100 CPU INTERFACE SERVO INTERFACE 90 RMUT 89 IOVDD0 88 NC 87 AVDD2 86 AOUT2 COVERTER 85 VREFR MIRR MIRR DFCT...
  • Page 66 HCD-GX255/RG170/RG470 IC251 BA5947FM-E2 MUTING + – INTERFACE LEVEL SHIFT INTERFACE INTERFACE VREF...
  • Page 67 HCD-GX255/RG170/RG470 IC301 TC94A34FG-002 Timing Generator VDDP PO5/AD5 /RESET PO6/AD6 STANDBY PO7AD7 /MICS /MILP MIDIO AD10 /MICK VDDT /MIACK/ SRMSTB AD16 VDDT VDDM PO8/AD11 SDO0 PO9/AD12 /CCE/ PO10/ BCKO AD13 BUCK/ PO11/ LRCKO AD14 SDO3/ SDI0 Interrupt Timer Control Switch General...

  • Page 68: Driver Board

    HCD-GX255/RG170/RG470 – DRIVER Board – IC303 BH15FB1WG IC701, 712 BA6956AN THERMAL PROTECTION OVER CURRENT PROTECTION CONTROL LOGIC VOLTAGE CONTROL REFERENCE BLOCK – CD-G Board – IC1002 MSM514400E-60TS-K WRITE DATA INPUT DATA OUTPUT CLOCK BUFFER BUFFER GENERATOR CLOCK GENERATOR 4M BIT...
  • Page 69 HCD-GX255/RG170/RG470 – MAIN Board – IC101 BD3401KS2 56 55 54 53 52 51 48 MNF2 SOFT 47 MOUT2 SWITCH 46 MOUT1 45 MNF1 44 BNF1 43 BOUT1 − 42 BOUT2 41 BNF2 INPUT SELECT − PBNF2 PBOUT2 BUFFER PBOUT1 −...
  • Page 70 HCD-GX255/RG170/RG470 – MIC Board – IC802 M65850FP-E1 OSCILLATOR LPF2 1/2 VCC CLOCK AUTO MAIN 20KBIT RESET RESET CONTROL SRAM LPF1...
  • Page 71 HCD-GX255/RG170/RG470 • IC Pin Function Description MAIN BOARD IC901 M30302MCP-A02FPU0 (SYSTEM CONTROLLER) Pin No. Pin Name Description O-BD3401- Serial data output to the electrical volume DATA O-BD3401-CLK Serial data transfer clock signal output to the electrical volume O-VFD-RESET System reset signal output to the FL/LED driver...
  • Page 72 HCD-GX255/RG170/RG470 Pin No. Pin Name Description O-MP3-STB Standby signal output to the MP3 decoder I-MP3-REQ Data send request signal input from the MP3 decoder O-MP3-LP Latch pulse signal output to the MP3 decoder O-XLT Latch pulse signal output to the CD DSP...
  • Page 73 HCD-GX255/RG170/RG470 Pin No. Pin Name Description O-BIAS REC bias on/off control signal output terminal Auto music sensor detection signal input from the electrical volume I-TAPE-AMS "L": music is present, "H": music is not present I-STREAM Audio signal input for stream LED (A/D input)
  • Page 74 HCD-GX255/RG170/RG470 CD-G BOARD IC1001 TC9411AFG (BS, K) (CD GRAPHICS DECODER) Pin No. Pin Name Description SESUB Not used CLCK Serial data transfer clock signal output to the CD DSP DATA Serial data input from the CD DSP SBSY Subcode Q sync (SCOR) input from the CD DSP...
  • Page 75 HCD-GX255/RG170/RG470 Pin No. Pin Name Description System clock input terminal (17.734475 MHz) (for PAL) Not used System clock output terminal (17.734475 MHz) (for PAL) Not used System clock input terminal (14.31818 MHz) (for NTSC) System clock output terminal (14.31818 MHz) (for NTSC)
  • Page 76 HCD-GX255/RG170/RG470 PANEL BOARD IC701 µPD780232GC-508-8BT-A (FL/LED DRIVER) Pin No. Pin Name Description VDD1 Power supply terminal (+3.3V) VSS1 Ground terminal System clock input terminal (4.19 MHz) System clock output terminal (4.19 MHz) Not used RESET System reset signal input from the system controller "L": reset...

  • Page 77: Exploded Views

    HCD-GX255/RG170/RG470 SECTION 7 EXPLODED VIEWS NOTE: • -XX and -X mean standardized parts, so they • Items marked “*” are not stocked since they The components identified by mark 0 or dotted line with mark 0 are may have some difference from the original are seldom required for routine service.

  • Page 78: Back Panel Section

    HCD-GX255/RG170/RG470 7-2. BACK PANEL SECTION supplied (MX) (MX) CD mechanism section-1 supplied M001 not supplied chassis section Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 3-254-142-01 SCREW (B3), (+) BV TAPPING 3-254-143-11 SCREW (B3), (+) BV TAPPING...

  • Page 79: Front Panel Section

    HCD-GX255/RG170/RG470 Ver. 1.1 7-3. FRONT PANEL SECTION (E2, E51, AR, MX) supplied not supplied PANEL board FL701 key section (EXCEPT MX) supplied supplied supplied supplied (MX) supplied supplied (E2, E51, AR, MX) (E2, E51, AR, (MX) not supplied supplied Ref. No.

  • Page 80: Key Section

    HCD-GX255/RG170/RG470 Ver. 1.1 7-4. KEY SECTION Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 2-348-864-03 DOOR (A), CASSETTE 2-348-871-12 KEY (CD) 2-549-974-01 SPRING (C-DOOR-L) 4-231-841-01 SPRING (HEART CAM-B) 4-238-631-11 TAPE SPRING 4-231-825-01 CAM (B), HEART X-2067-227-1 PANEL (S) ASSY, FRONT (GX255/RG170: AEP,...

  • Page 81: Chassis Section

    HCD-GX255/RG170/RG470 7-5. CHASSIS SECTION (MX) (GX255/RG170/ RG470: AEP, EE, RU) (RG470: E2, E51, MX, AR) (RG470: E2, E51, MX, AR) not supplied not supplied supplied (RG170: AEP, EE, RU, EA, AUS/ RG470: AEP, EE, RU) transformer section Ref. No. Part No.

  • Page 82: Transformer Section

    HCD-GX255/RG170/RG470 7-6. TRANSFORMER SECTION (RG470: E2, E51, AR, MX) (G255/RG170/RG470: AEP, EE, RU) F908 F904 PT901 F904 F905 F905 F909 F906 F906 F907 F907 supplied supplied supplied Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 3-077-331-01 +BV3 (3-CR) 0 F904 1-533-471-12 FUSE, GLASS TUBE (DIA.

  • Page 83: Cd Mechanism Deck Section-1 (Cdm74Kfs-F1Bd81C (Except Mx Model)/ Cdm74Kfs-F1Bd84 (Mx Model))

    HCD-GX255/RG170/RG470 7-7. CD MECHANISM DECK SECTION-1 (CDM74KFS-F1BD81C (EXCEPT MX MODEL)/ CDM74KFS-F1BD84 (MX MODEL)) M741 CD mechanism deck section-2 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 4-218-253-62 SCREW (M2.6), +BTTP 4-243-820-01 GEAR (TABLE) 1-776-182-11 WIRE (FLAT TYPE) (5 CORE)

  • Page 84: Cdm74Kfs-F1Bd81C (Except Mx Model Cdm74Kfs-F1Bd84 (Mx Model))

    HCD-GX255/RG170/RG470 7-8. CD MECHANISM DECK SECTION-2 (CDM74KFS-F1BD81C (EXCEPT MX MODEL)/ CDM74KFS-F1BD84 (MX MODEL)) S711 M751 S101 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark A-1103-756-A DRIVER BOARD, COMPLETE X-2102-809-1 PULLEY (KH) ASSY 4-218-253-52 SCREW (M2.6), +BTTP...

  • Page 85: Electrical Parts List

    HCD-GX255/RG170/RG470 SECTION 8 AUDIO IN ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in the • Items marked “*” are not stocked since they The components identified by mark 0 or dotted line with mark 0 are parts list may be different from the parts are seldom required for routine service.
  • Page 86 HCD-GX255/RG170/RG470 BD CD Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C303 1-164-360-11 CERAMIC CHIP 0.1uF R181 1-216-809-11 METAL CHIP 1/10W C305 1-126-246-11 ELECT CHIP 220uF R182 1-216-809-11 METAL CHIP 1/10W C306 1-164-360-11 CERAMIC CHIP 0.1uF...
  • Page 87 HCD-GX255/RG170/RG470 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C116 1-128-995-21 ELECT CHIP 100uF C122 1-107-826-11 CERAMIC CHIP 0.1uF C320 1-162-964-11 CERAMIC CHIP 0.001uF C123 1-107-826-11 CERAMIC CHIP 0.1uF < CONNECTOR > C124 1-162-959-11 CERAMIC CHIP...
  • Page 88 HCD-GX255/RG170/RG470 CD-G Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R305 1-216-845-11 METAL CHIP 100K 1/10W < CONNECTOR > R306 1-216-864-11 SHORT CHIP R307 1-216-833-11 METAL CHIP 1/10W CN1001 1-779-416-11 CONNECTOR, FFC (LIF (NON-ZIF)) 13P R313...
  • Page 89 HCD-GX255/RG170/RG470 CD-G DRIVER HEADPHONE MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < VIBRATOR > < JACK > X1002 1-813-555-11 VIBRATOR, CRYSTAL (14.31818MHz) J701 1-785-448-21 JACK (PHONES) ************************************************************ ************************************************************ A-1103-756-A DRIVER BOARD, COMPLETE A-1093-944-A MAIN BOARD, COMPLETE (GX255)
  • Page 90 HCD-GX255/RG170/RG470 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C101 1-126-960-11 ELECT C177 1-162-960-11 CERAMIC CHIP 220PF C102 1-126-960-11 ELECT C178 1-162-960-11 CERAMIC CHIP 220PF C103 1-162-964-11 CERAMIC CHIP 0.001uF C179 1-126-964-11 ELECT 10uF C104 1-162-964-11 CERAMIC CHIP 0.001uF...
  • Page 91 HCD-GX255/RG170/RG470 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C255 1-162-945-11 CERAMIC CHIP 22PF CN331 1-784-774-11 CONNECTOR, FFC 13P (MX) (GX255/RG170: E2, E3, E51, EA, AR, AUS/RG470) C256 1-162-945-11 CERAMIC CHIP 22PF CN341 1-784-774-11 CONNECTOR, FFC 13P...
  • Page 92 HCD-GX255/RG170/RG470 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < JUMPER RESISTOR > R006 1-216-829-11 METAL CHIP 4.7K 1/10W R007 1-216-833-11 METAL CHIP 1/10W JR001 1-216-864-11 SHORT CHIP JR005 1-216-864-11 SHORT CHIP R032 1-216-821-11 METAL CHIP...
  • Page 93 HCD-GX255/RG170/RG470 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R175 1-216-821-11 METAL CHIP 1/10W R110 1-216-841-11 METAL CHIP 1/10W R176 1-216-821-11 METAL CHIP 1/10W R111 1-216-845-11 METAL CHIP 100K 1/10W R177 1-216-821-11 METAL CHIP 1/10W...
  • Page 94 HCD-GX255/RG170/RG470 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R254 1-216-837-11 METAL CHIP 1/10W R350 1-216-829-11 METAL CHIP 4.7K 1/10W (GX255/RG170: E2, E3, E51, EA, AR, AUS) R351 1-216-841-11 METAL CHIP 1/10W R257 1-216-833-11 METAL CHIP...
  • Page 95 HCD-GX255/RG170/RG470 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R905 1-216-833-11 METAL CHIP 1/10W R970 1-216-821-11 METAL CHIP 1/10W R907 1-216-841-11 METAL CHIP 1/10W R971 1-216-833-11 METAL CHIP 1/10W (CND, RU, E3, EA, MX, AUS)
  • Page 96 HCD-GX255/RG170/RG470 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C811 1-124-463-00 ELECT 0.1uF < JACK > (E2, E51, AR, MX) C813 1-119-774-11 ELECT 100uF JK801 1-770-226-11 JACK (LARGE TYPE) (MIC 1) (MX) (E2, E51, AR, MX)
  • Page 97 HCD-GX255/RG170/RG470 MOTOR (LD) MOTOR (TB) PANEL Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R855 1-216-837-11 METAL CHIP 1/10W < CONNECTOR > (MX) R856 1-216-833-11 METAL CHIP 1/10W CN601 1-784-741-11 CONNECTOR, FFC 19P (MX) CN602 1-564-721-11 PIN, CONNECTOR (SMALL TYPE) 5P...
  • Page 98 HCD-GX255/RG170/RG470 PANEL POWER Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R627 1-216-801-11 METAL CHIP 1/10W < SWITCH > R628 1-216-801-11 METAL CHIP 1/10W R631 1-216-833-11 METAL CHIP 1/10W S601 1-762-875-21 SWITCH, KEYBOARD (I/1) (RG470) S602...
  • Page 99 HCD-GX255/RG170/RG470 POWER Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C481 1-104-665-11 ELECT 100uF C406 1-137-839-11 ELECT 2200uF (RG170: E2, E3, E51, EA, AR, AUS) C486 1-126-961-11 ELECT 2.2uF C406 1-137-841-11 ELECT 2200uF C488 1-126-965-11 ELECT...
  • Page 100 HCD-GX255/RG170/RG470 POWER Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < JUMPER RESISTOR > (RG470: E2, E51, AR, MX) JR441 1-216-864-11 SHORT CHIP R437 1-216-833-11 METAL CHIP 1/10W JR442 1-216-864-11 SHORT CHIP R439 1-216-833-11 METAL CHIP...
  • Page 101 HCD-GX255/RG170/RG470 POWER SENSOR SUB TRANS Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R471 1-216-845-11 METAL CHIP 100K 1/10W (RG470: E2, E51, AR, MX) A-1093-877-A SUB TRANS BOARD, COMPLETE R472 1-216-845-11 METAL CHIP 100K 1/10W (RG470: AEP, EE, RU)
  • Page 102 HCD-GX255/RG170/RG470 TRANSFORMER VIDEO OUT Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark A-1094-082-A TRANSFORMER BOARD, COMPLETE (GX255) A-1094-083-A TRANSFORMER BOARD, COMPLETE A-1093-878-A VOL BOARD, COMPLETE (RG170: AEP, EE, RU) ******************** A-1094-084-A TRANSFORMER BOARD, COMPLETE (RG170: E2, E3, E51) <...
  • Page 103 HCD-GX255/RG170/RG470 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark MISCELLANEOUS S101 1-771-853-11 SWITCH, DETECTION (LIMIT) ************** 1-828-975-11 WIRE (FLAT TYPE) (13 CORE) (MX) ************************************************************ 1-828-963-11 WIRE (FLAT TYPE) (11 CORE) (GX255/RG170: RU, E2, E3, E51, EA, AR, AUS/...
  • Page 104 HCD-GX255/RG170/RG470 MEMO...

  • Page 105: E51 : Chilean And Peruvian Model

    HCD-GX255/RG170/RG470 Canadian Model HCD-GX255 AEP Model SERVICE MANUAL E Model HCD-RG170/RG470 Australian Model Ver. 1.2 2005.09 HCD-RG170 SUPPLEMENT-1 Subject: • Change of CD Mechanism Block (CDM74KFS-K6BD83S) • Change of MAIN board • Change of HEADPHONE board Changing Destination HCD-GX255 : CND model HCD-RG170/RG470 : AEP, EE, RU, E2, E51 models •...
  • Page 106 HCD-GX255/RG170/RG470 TABLE OF CONTENTS NEW/FORMER TYPE DISCRIMINATION ..3 ELECTRICAL ADJUSTMENT ......4 DIAGRAMS 3-1. Printed Wiring Board – CD Board – ....... 6 3-2. Schematic Diagram – CD Board – ........7 3-3. Printed Wiring Board – MAIN Board – ......8 3-4.

  • Page 107: New/Former Type Discrimination

    HCD-GX255/RG170/RG470 NEW/FORMER TYPE DISCRIMINATION New/former type can be distinguished in the version display mode of the test mode. Procedure: 1. Press the button to turn the power on. , [ILLUMINATION] and [DISC 2] 2. Press three buttons of simultaneously. 3. When this mode is activated, model and destination is displayed on the fluorescent indicator tube.

  • Page 108: Electrical Adjustment

    HCD-GX255/RG170/RG470 ELECTRICAL ADJUSTMENT Checking Location: CD SECTION – CD Board (Conductor Side) – Note: 1. CD Block is basically constructed to operate without adjustment. 2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated. 3. Use an oscilloscope with more than 10 MΩ impedance.

  • Page 109: Diagrams

    HCD-GX255/RG170/RG470 DIAGRAMS • Note For Printed Wiring Boards and Schematic Diagrams • Waveforms – CD Board – – MAIN Board – Note on Printed Wiring Board: Note on Schematic Diagram: IC201 1 (LRCK), 2 (LRCKI) IC901 qa • X : parts extracted from the component side.

  • Page 110: Printed Wiring Board - Cd Board

    HCD-GX255/RG170/RG470 3-1. PRINTED WIRING BOARD – CD Board (Component Side) – : Uses unleaded solder. M401 (SPINDLE) CD BOARD (COMPONENT SIDE) CD BOARD (CONDUCTOR SIDE) S201 (LIMIT) R280 C405 C406 R451 M402 (SLED) IC402 R104 R105 C104 R110 C109 R277...

  • Page 111: Schematic Diagram - Cd Board

    HCD-GX255/RG170/RG470 • See page 5 for Waveforms. • See page 13 for IC Block Diagrams. • See page 15 for IC Pin Function Description. 3-2. SCHEMATIC DIAGRAM – CD Board – C210 C208 (RFACI) C230 R256 100p C257 C274 CN301...
  • Page 112 HCD-GX255/RG170/RG470 3-3. PRINTED WIRING BOARD – MAIN Board – : Uses unleaded solder. • Semiconductor Location (Page 6) CD BOARD MAIN BOARD CN102 Ref. No. Location (RG470) (CND, RU) D001 I-11 ANTENNA R958 JW127 R923 R387 D002 I-11 R931 (CND, E2, E51)

  • Page 113: Schematic Diagram - Main Board (1/3)

    HCD-GX255/RG170/RG470 • See page 5 for Waveforms. • See page 15 for IC Pin Function Description. 3-4. SCHEMATIC DIAGRAM – MAIN Board (1/3) – (1/3) R1971 (AEP,EE,E2,E51) R1972 R1973 (AEP,EE,RU) R1974 R1975 CN991 R1977 (GX255/RG170) R953 R958 -VFL VFL- R971...

  • Page 114: Schematic Diagram - Main Board (2/3)

    HCD-GX255/RG170/RG470 • See page 5 for Waveforms. • See page 13 for IC Block Diagrams. 3-5. SCHEMATIC DIAGRAM – MAIN Board (2/3) – (Page 9) (2/3) Q111,112 (E2,E51) BAND-PASS FILTER C070 C185 C196 C215 (E2,E51) (AEP,EE,RU) C114 (Refer to page 47 of...

  • Page 115: Schematic Diagram - Main Board (3/3)

    HCD-GX255/RG170/RG470 3-6. SCHEMATIC DIAGRAM – MAIN Board (3/3) – (Page 9) (3/3) RDS DATA R386 (AEP,EE) RDS CLK R385 ANTENNA R390 JW040 +3.3V R391 ∗ TU-MUTE R384 T-MU FM 75Ω ∗C253,254 TUNER-R TU-R COAXIAL (RG170:AEP,EE,RU) TUNER (GX255/RG170:E2,E51/RG470) (FM/AM) TUNER-L TU-L ∗R251,252...

  • Page 116: Printed Wiring Board - Headphone Board

    HCD-GX255/RG170/RG470 3-7. PRINTED WIRING BOARD – HEADPHONE Board – 3-8. SCHEMATIC DIAGRAM – HEADPHONE Board – : Uses unleaded solder. HEADPHONE BOARD JW701 CN701 MAIN BOARD CN061 C782 C781 L-OUT 1000p 1000p (Page 8) J701 HP-GND CN701 PHONES R-OUT D-GND...
  • Page 117 HCD-GX255/RG170/RG470 • IC Block Diagram – CD Board – IC402 BA5947FM-E2 MUTING + – INTERFACE LEVEL SHIFT INTERFACE INTERFACE VREF...
  • Page 118 HCD-GX255/RG170/RG470 – MAIN Board – IC101 BD3401KS2 56 55 54 53 52 51 48 MNF2 SOFT 47 MOUT2 SWITCH 46 MOUT1 45 MNF1 44 BNF1 43 BOUT1 − 42 BOUT2 41 BNF2 INPUT SELECT − PBNF2 PBOUT2 BUFFER PBOUT1 −...
  • Page 119 HCD-GX255/RG170/RG470 • IC Pin Function Description CD BOARD IC201 CXD3014A-201R (CD DSP) Pin No. Pin Name Description LRCK L/R sampling clock signal output terminal LRCKI L/R sampling clock signal input terminal PCMD Serial data output terminal PCMDI Serial data input terminal...
  • Page 120 HCD-GX255/RG170/RG470 Pin No. Pin Name Description FFDR Focus servo drive signal (+) output to the coil/motor driver FRDR Focus servo drive signal (-) output to the coil/motor driver IOVDD1 Power supply terminal (+3.3V) AVDD0 Power supply terminal (+3.3V) AVSS0 Ground terminal...
  • Page 121 HCD-GX255/RG170/RG470 Pin No. Pin Name Description CLK2 MP3 serial data transfer clock signal input from the system controller SVSS Ground terminal SVDD Power supply terminal (+2.5V) JTAGTCK Not used JTAGTDI Not used JTAGTDO Not used JTAGTMS Not used TRST Not used Ground terminal Power supply terminal (+1.8V)
  • Page 122 HCD-GX255/RG170/RG470 MAIN BOARD M30302MCP-A05FPU0 (SYSTEM CONTROLLER) Pin No. Pin Name Description O-BD3401- Serial data output to the electrical volume DATA O-BD3401-CLK Serial data transfer clock signal output to the electrical volume O-VFD-RESET System reset signal output to the FL/LED driver...
  • Page 123 HCD-GX255/RG170/RG470 Pin No. Pin Name Description O-XLAT CD serial data latch pulse signa output to the CD DSP I-REQ-MP3 MP3 data request signal input from the CD DSP O-REQ-MP3 MP3 data request signal output to the CD DSP O-SSTB-MP3 Muting on/off control signal output to the motor/coil driver "L": muting on...
  • Page 124 HCD-GX255/RG170/RG470 Pin No. Pin Name Description I-PROTECTOR Protector operating detection signal input terminal AVSS Ground terminal I-POWER, Front panel key input terminal (A/D input) DISPLAY VREF Reference voltage input terminal AVCC Power supply terminal (+3.3V) Not used...

  • Page 125: Exploded Views

    HCD-GX255/RG170/RG470 EXPLODED VIEWS NOTE: • -XX and -X mean standardized parts, so they • Items marked “*” are not stocked since they The components identified by mark 0 or dotted line with mark 0 are may have some difference from the original are seldom required for routine service.

  • Page 126: Chassis Section

    HCD-GX255/RG170/RG470 4-2. CHASSIS SECTION (GX255/RG170/ (RG470: E2, E51) RG470: AEP, EE, RU) (RG470: E2, E51) not supplied not supplied (AEP, EE, RU) supplied transformer section (Refer to page 82 of service manual) Ref. No. Part No. Description Remark Ref. No.

  • Page 127: Cd Mechanism Deck Section-1 (Cdm74Kfs-K6Bd83S)

    HCD-GX255/RG170/RG470 4-3. CD MECHANISM DECK SECTION-1 (CDM74KFS-K6BD83S) M741 CD mechanism deck section-2 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 4-218-253-62 SCREW (M2.6), +BTTP 4-243-820-01 GEAR (TABLE) 1-776-182-11 WIRE (FLAT TYPE) (5 CORE) 1-687-134-12 MOTOR (TB) BOARD...

  • Page 128: Cd Mechanism Deck Section-2 (Cdm74Kfs-K6Bd83S)

    HCD-GX255/RG170/RG470 4-4. CD MECHANISM DECK SECTION-2 (CDM74KFS-K6BD83S) S711 M751 S101 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark A-1103-756-A DRIVER BOARD, COMPLETE 4-243-822-02 LEVER (LIFTER) 4-218-253-52 SCREW (M2.6), +BTTP X-2102-809-1 PULLEY (KH) ASSY 1-687-669-12 SW BOARD...

  • Page 129: Electrical Parts List

    HCD-GX255/RG170/RG470 ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in the • Items marked “*” are not stocked since they The components identified by mark are seldom required for routine service. parts list may be different from the parts...
  • Page 130 HCD-GX255/RG170/RG470 HEADPHONE MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < TRANSISTOR > A-1138-328-A HEADPHONE BOARD, COMPLETE *************************** Q321 6-551-120-01 TRANSISTOR 2SA2119K < CAPACITOR > < RESISTOR/FERRITE BEAD > C781 1-162-964-11 CERAMIC CHIP 0.001uF R101...
  • Page 131 HCD-GX255/RG170/RG470 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C069 1-162-964-11 CERAMIC CHIP 0.001uF C173 1-162-966-11 CERAMIC CHIP 0.0022uF 10% (AEP, EE, RU) C174 1-162-966-11 CERAMIC CHIP 0.0022uF 10% C070 1-162-915-11 CERAMIC CHIP 10PF 0.5PF...
  • Page 132 HCD-GX255/RG170/RG470 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C254 1-216-864-11 SHORT CHIP 0 (RG170: AEP, EE, RU) CN381 1-784-776-11 CONNECTOR, FFC 15P (AEP, EE) C255 1-162-945-11 CERAMIC CHIP 22PF CN391 1-784-774-11 CONNECTOR, FFC 13P...
  • Page 133 HCD-GX255/RG170/RG470 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < RESISTOR > R042 1-216-833-11 METAL CHIP 1/10W R043 1-216-825-11 METAL CHIP 2.2K 1/10W 0 JW030 1-202-972-61 FUSIBLE 1/4W F R044 1-216-864-11 SHORT CHIP 0 (RG470)
  • Page 134 HCD-GX255/RG170/RG470 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R130 1-216-864-11 SHORT CHIP R189 1-216-825-11 METAL CHIP 2.2K 1/10W R131 1-216-849-11 METAL CHIP 220K 1/10W R190 1-216-825-11 METAL CHIP 2.2K 1/10W R132 1-216-849-11 METAL CHIP...
  • Page 135 HCD-GX255/RG170/RG470 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R268 1-216-829-11 METAL CHIP 4.7K 1/10W R384 1-216-809-11 METAL CHIP 1/10W (CND, E2, E51) R301 1-216-821-11 METAL CHIP 1/10W R384 1-216-817-11 METAL CHIP 1/10W R302 1-216-821-11 METAL CHIP...
  • Page 136 HCD-GX255/RG170/RG470 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R943 1-216-829-11 METAL CHIP 4.7K 1/10W MISCELLANEOUS ************** R944 1-216-849-11 METAL CHIP 220K 1/10W R945 1-216-813-11 METAL CHIP 1/10W 1-829-003-11 WIRE (FLAT TYPE) (19 CORE) R946...
  • Page 137 HCD-GX255/RG170/RG470 MEMO...

  • Page 138: Revision History

    HCD-GX255/RG170/RG470 REVISION HISTORY Clicking the version allows you to jump to the revised page. Also, clicking the version at the upper right on the revised page allows you to jump to the next revised page. Ver. Date Description of Revision 2005.04...

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