Sony CX-JT7 Service Manual
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Sony CX-JT7 Service Manual

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SERVICE MANUAL
Ver 1.0 2003.04
CX-JT7 is the tuner, amplifier, cassette
deck and CD player section in JAX-T7
and JAX-PK7.
TUNER
FM tuning range
87.5 MHz to 108 MHz
FM usable sensitivity (IHF)
16.8 dBf
FM antenna terminal
75 ohms (unbalanced)
AM tuning range
531 kHz to 1602 kHz
AM usable sensitivity
350 µV/m
AM antenna
Loop antenna
AMPLIFIER
Power output
Rated: 80 W + 80 W (6 ohms, T.H.D.
1 %, 1 kHz/DIN 45500)
Reference: 100 W + 100 W (6 ohms,
T.H.D. 10 %, 1 kHz/DIN 45324)
MUSIC POWER: 225 W + 225 W
Total harmonic distortion
0.08 % (50 W, 1 kHz, 6 ohms, DIN
AUDIO)
Input
MD (VIDEO): 1.5 V
Outputs
SPEAKERS: 6 ohms or more
PHONES: 32 ohms or more
CASSETTE DECK
Track format
4 tracks, 2 channels stereo
Frequency response
50 Hz – 8 kHz
Recording system
AC bias
Heads
Deck A: playback x 1
Deck B: recording/playback x 1,
erase x 1
Sony Corporation
9-877-252-01
2003D0500-1
Home Audio Company
C 2003.04
Published by Sony Engineering Corporation
Model Name Using Similar Mechanism
CD Mechanism Type
CD
Base Unit Name
Section
Optical Block Name
Optical Pick-up Name
Model Name Using Similar Mechanism
Tape deck
Section
Tape Transport Mechanism Type

SPECIFICATIONS

CD PLAYER
Laser
Semiconductor laser
(λ = 780 nm)
Emission duration:
continuous
D/A converter
1 bit dual
Signal-to-noise ratio
85 dB (1 kHz, 0 dB)
Harmonic distortion
0.05 % (1 kHz, 0 dB)
GENERAL
Power requirements
230 V AC, 50/60 Hz
Power consumption
130 W
Power consumption
With ECO mode on: 0.25 W
in standby mode
With ECO mode off: 20 W
Dimensions (W x H x D)
280 x 328 x 437 mm (AEP, UK, CIS)
280 x 328 x 446 mm (MX, E51)
Weight
8.4 kg (AEP, UK, CIS)
9.3 kg (MX, E51)
Specifications and external appearance are subject to change
without notice.
CX-JT7
NEW
CDM74F-K6BD71A
BU-K6BD71A
KSM-213DCP
KSS-213D
NEW
CWM43FR16
CWM43RR23
COPYRIGHT
Check copyright laws relevant to recordings from discs, tuner
or tape for the country where the unit is to be used.
Licensed by BBE Sound, Inc. under USP4638258, 5510752
and 5736897.
• Abbreviation
E51 : Chilean and Peruvian models
MX : Mexican model
COMPACT DISC DECK RECEIVER
AEP Model
UK Model
E Model

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  • Page 1: Specifications

    CX-JT7 SERVICE MANUAL AEP Model UK Model Ver 1.0 2003.04 E Model CX-JT7 is the tuner, amplifier, cassette deck and CD player section in JAX-T7 and JAX-PK7. Model Name Using Similar Mechanism CD Mechanism Type CDM74F-K6BD71A Base Unit Name BU-K6BD71A...
  • Page 2 LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB- LISHED BY SONY.

  • Page 3: Table Of Contents

    CX-JT7 TABLE OF CONTENTS SERVICING NOTES 6-25. Printed Wiring Board – POWER Board – ..........4 (AEP, UK, CIS models) ..........46 6-26. Printed Wiring Board – POWER Board – GENERAL (MX model) ..............47 Location of Controls ............7 6-27.

  • Page 4: Servicing Notes

    CX-JT7 SECTION 1 SERVICING NOTES • MODEL IDENTIFICATION NOTES ON HANDLING THE OPTICAL PICK-UP – Back Panel – BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electro- static break-down because of the potential difference generated by the charged electrostatic load, etc.
  • Page 5 CX-JT7 HOW TO OPEN THE DISC TRAY WHEN POWER SWITCH TURNS OFF. 1 Remove the case (side-L). 2 Turn the loading gear in the direction of arrow A . 3 Pull-out the disc tray.
  • Page 6 CX-JT7 SERVICE POSITION – CD mechanism deck – main board (CN312) BD board (CN710) Connect wire (flat type) (19 core) to main board (CN312) and BD board (CN710). – Tape mechanism deck – panel board (CN801) Connect wire (flat type) (13 core) to main board (CN203) panel board (CN801) and mechanical deck.

  • Page 7: General

    CX-JT7 SECTION 2 This section is extracted from instruction manual. GENERAL • LOCATION OF CONTROLS 1 DISC CHANGE/DISC SKIP 7 DISC DIRECT PLAY 1-3 # BASS Main unit: front Selects a disc. Rotates the CD trays. Adjusts low frequency sound.
  • Page 8 CX-JT7 Buttons with the same or similar names with the main unit 3 r, t 9 FUNCTION Remote control basically have the same function. CD: selects a track. Switches the active function among CD, TAPE, TUNER Refer to the pages indicated in parentheses for details.

  • Page 9: Disassembly

    CX-JT7 SECTION 3 DISASSEMBLY • This set can be disassembled in the order shown below. 3-1. DISASSEMBLY FLOW Note 1: The process described in can be performed in any order. Note 2: Without completing the process described in , the next process can not be performed.

  • Page 10: Case (Side-L/R)

    CX-JT7 Note: Follow the disassembly procedure in the numerical order given. 3-2. CASE (SIDE-L/R) 6 two screws 0 case (side-L) (BVTP3 × 1 two screws (BVTP3 × 7 three screws (case3 TP2) 5 case (side-R) 2 three screws (case3 TP2) 3-3.

  • Page 11: Tray Panel

    CX-JT7 3-4. TRAY PANEL 1 Turn the loading gear in the direction of arrow A . 2 Pull-out the disc table. 3 four claws 4 tray panel 3-5. CD MECHANISM DECK (CDM74F-K6BD71A) 6 CD mechanism deck (CDM74F-K6BD71A) 1 wire (flat type) (19 core)

  • Page 12: Front Panel Section

    CX-JT7 3-6. FRONT PANEL SECTION 4 connector (CN203) 3 connector (CN202) 5 wire (flat type) (9 core) (CN311) 2 connector (CN310) 1 wire (flat type) (31 core) (CN304) 7 front panel section 6 three screws (BVTP3 × 3-7. MECHANICAL DECK...

  • Page 13: Rear Cabinet Section

    CX-JT7 3-8. REAR CABINET SECTION 3 two screws (BVTP3 × 4 cover (duct) 5 five screws (BVTP3 × 1 wire (flat type) (11core: CIS, MX, E51) (15core: AEP, UK) 6 rear cabinet section 2 connector (CN303) 3-9. MAIN BOARD 3 main board...

  • Page 14: Power Board

    CX-JT7 3-10. POWER BOARD 2 two screws 3 two screws (BVIT3B-8R W/O SLOT) (BVIT3B-8R W/O SLOT) 1 connector (CN902) 4 power board 3-11. TRANSFORMER BOARD 5 four screws (ITC+4-8R) 2 screw (BVTT3 × 1 screw (BVTP3 × 3 trans holder...

  • Page 15: Motor (Tb) Board

    CX-JT7 3-12. TABLE ASSY 5 two claws 4 hook 3 wire (flat type) (5 core) (CN702) 1 Turn the loading gear 2 Pull-out the table assy. in the direction of arrow A . 6 table assy 3-13. MOTOR (TB) BOARD 1 screw (PTPWH M2.6)

  • Page 16: Motor (Ld) Board

    CX-JT7 3-14. MOTOR (LD) BOARD 3 two screws (BTTP M2.6) 4 motor (LD) board 2 connector (CN704) 1 belt (loading) 3-15. BASE UNIT (BU-K6BD71A) 5 base unit (BU-K6BD71A) 4 four insulators 3 four coil springs (insulator) 2 four stoppers (BU) 1 four screws (BTTP M2.6)

  • Page 17: Motor Gear Assy (Sled) (M701), Bd Board

    CX-JT7 3-16. MOTOR GEAR ASSY (SLED) (M701), BD BOARD 7 gear (A) 6 claw 8 gear (B) 2 two screws (P2 × 3) 5 wire (flat type) (16 core) (CN708) qa BD board 0 motor gear assy (SLED) (M701) 1 Remove two solders.

  • Page 18: Test Mode

    CX-JT7 SECTION 4 TEST MODE [COLD RESET] [CD TRAY LOCK MODE] • The cold reset clears all data including preset data stored in the • This mode is used to unable to take sample disc out of tray in RAM to initial conditions. Execute this mode when returning the shop.
  • Page 19 CX-JT7 [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 If an error occurred, stop display that step. tape deck section.
  • Page 20 CX-JT7 [GC TEST MODE] [MODEL, DESTINATION AND VERSION DISPLAY] • This mode is used to check the fluorescent indicator tube, LED • This mode is used to check the model, destination and software and key. version. Procedure: Procedure: [POWER] 1. Press the key to turn the power ON.

  • Page 21: Cd Section

    CX-JT7 SECTION 5 ELECTRICAL ADJUSTMENTS Note: Clear RF signal waveform means that the shape “ ◊ ” can be clearly CD SECTION distinguished at the center of the waveform. Note: RF signal waveform 1. CD Block is basically designed to operate without adjustment. Therefore, check each item in order given.

  • Page 22: Diagrams

    CX-JT7 SECTION 6 DIAGRAMS 6-1. BLOCK DIAGRAM – CD Section – RF AMP, FOCUS/TRACKING ERROR AMP, DIGITAL SIGNAL PROCESSOR, DIGIRAL SERVO PROCESSOR, • R-ch is omitted due to same as L-ch. DIGITAL FILTER, D/A CONVERTER • SIGNAL PATH IC721 : CD PLAY...

  • Page 23: Block Diagram - Tuner/Tape/Panel Section

    CX-JT7 6-2. BLOCK DIAGRAM – TUNER/TAPE/PANEL Section – DECK A/B SELECT SWITCH, REC/PB EQ AMP IC201 (SUFFIX-11) IC201 (SUFFIX-13) AIN (L) L-CH TAI (L) MUTE EQOUT (L) PB-OUT (L) TAPE-L TAPE-L, REC-L BIN (L) (Page 24) (PB) (DECK-A) R-CH R-CH...

  • Page 24: Block Diagram - Amp/Power Supply Section

    CX-JT7 6-3. BLOCK DIAGRAM – AMP/POWER SUPPLY Section – (Except AEP, UK, CIS) MIC LEVEL MIC, SA (Page 23) Q401 J401 VR401 D401 MIC MIXING D402 SWITCHING MIC AMP MIC AMP OUTPUT LEVEL IC401 (1/2) IC401 (2/2) FAN MOTOR M731...

  • Page 25: Note For Printed Wiring Boards And Schematic Diagrams

    CX-JT7 6-4. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS • Circuit Boards Location SENSOR board Note on Printed Wiring Board: Note on Schematic Diagram: • X : parts extracted from the component side. • All capacitors are in µF unless otherwise noted. pF: µµF •...

  • Page 26: Printed Wiring Board - Bd Board

    CX-JT7 6-5. PRINTED WIRING BOARD – BD Board – • See page 25 for Circuit Boards Location. :Uses unleaded solder. BD BOARD (COMPONENT SIDE) OPTICAL PICK-UP BLOCK BD BOARD (KSM-213DCP) M702 (SPINDLE) (CONDUCTOR SIDE) S701 (LIMIT IN) – M701 (SLED) IC722 –...

  • Page 27: Schematic Diagram - Bd Board

    CX-JT7 6-6. SCHEMATIC DIAGRAM – BD Board – • • See page 54 for IC Block Diagrams. See page 54 for Waveforms. R732 IC803 MM1571J R731 2.2k R721 R722 C753 R834 R707 C709 C746 C742 C708 R729 C744 C754 6.3V...

  • Page 28: Printed Wiring Boards - Changer Section

    CX-JT7 6-7. PRINTED WIRING BOARDS – CHANGER Section – • :Uses unleaded solder. See page 25 for Circuit Boards Location. SW BOARD SENSOR BOARD CN751 IC731 (SUFFIX-11) (SUFFIX-13) MAIN BOARD MAIN BOARD S751 CN309 CN309 OPEN/CLOSE (Page 34) (Page 35)

  • Page 29: Schematic Diagram - Changer Section

    CX-JT7 6-8. SCHEMATIC DIAGRAM – CHANGER Section – • See page 54 for IC Block Diagrams. 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 30 CX-JT7 6-9. SCHEMATIC DIAGRAM – MAIN Board (1/4) (Suffix-11) – • See page 54 for IC Block Diagram. (1/4) CN101 FM 75Ω VM+9V D102 10EDB40-TB3 TUNER UNIT (COAXIAL) SUPPLIED WITH TUNED TUNED ANTENNA C101 C310 THE ASSEMBLED C103 100 16V...

  • Page 31: Schematic Diagram - Main Board (1/4) (Suffix-11)

    CX-JT7 6-10. SCHEMATIC DIAGRAM – MAIN Board (2/4) (Suffix-11) – • See page 54 for IC Block Diagram. • See page 54 for Waveforms. C268 (2/4) R268 R266 R220 4.7k 4.7k C248 R286 R216 R272 C260 C272 (PB) 4.7k 0.47...

  • Page 32: Schematic Diagram - Main Board (3/4) (Suffix-11)

    CX-JT7 6-11. SCHEMATIC DIAGRAM – MAIN Board (3/4) (Suffix-11) – • See page 54 for IC Block Diagram. (Page 30) (3/4) R375 4.7k R339 R331 3.3k R340 5.6k R478 2.2k R403 C316 C330 C340 R347 R338 Q315 Q316 CN306 4.7k 4.7k...

  • Page 33: Schematic Diagram - Main Board (4/4) (Suffix-11)

    CX-JT7 6-12. SCHEMATIC DIAGRAM – MAIN Board (4/4) (Suffix-11) – (Page 30) (Page 31) (4/4) C363 MIC10V R309 R313 100k CN304 FIL2 FIL1 D-GND -VFL -VFL EVER+10V EVER 10V BUFFER MIC+10V IC304 MIC 10V NJM4565M 4V(SW) BU1924 CLK C364 R432...

  • Page 34: Printed Wiring Board - Main Board (Suffix-11)

    CX-JT7 6-13. PRINTED WIRING BOARD – MAIN Board (Suffix-11) – • :Uses unleaded solder. See page 25 for Circuit Boards Location. • Semiconductor Location ANTENNA Ref. No. Location FM 75Ω (COAXIAL) LOOP D102 C-16 D205 D206 TUNER UNIT D301 O-13...

  • Page 35: Printed Wiring Board - Main Board (Suffix-13)

    CX-JT7 6-14. PRINTED WIRING BOARD – MAIN Board (Suffix-13) – • :Uses unleaded solder. See page 25 for Circuit Boards Location. • Semiconductor Location ANTENNA Ref. No. Location FM 75Ω D101 D-13 (COAXIAL) LOOP D102 C-14 D205 TUNER UNIT D206...

  • Page 36: Schematic Diagram - Main Board (1/4) (Suffix-13)

    CX-JT7 6-15. SCHEMATIC DIAGRAM – MAIN Board (1/4) (Suffix-13) – • See page 54 for IC Block Diagram. (1/4) ∗ CN101 CN101 (AEP,UK) ∗ (CIS,MX,E51) VM+9V D102 10EDB40-TB3 TUNED TUNED C101 C310 FM 75Ω C103 100 16V TUNER UNIT (COAXIAL)

  • Page 37: Schematic Diagram - Main Board (2/4) (Suffix-13)

    CX-JT7 6-16. SCHEMATIC DIAGRAM – MAIN Board (2/4) (Suffix-13) – • See page 54 for IC Block Diagram. • See page 54 for Waveforms. C268 (2/4) R268 R266 R220 4.7k 4.7k C248 R286 R216 R272 C260 C272 (PB) 4.7k 0.47...

  • Page 38: Schematic Diagram - Main Board (3/4) (Suffix-13)

    CX-JT7 6-17. SCHEMATIC DIAGRAM – MAIN Board (3/4) (Suffix-13) – • See page 54 for IC Block Diagram. (Page 36) (3/4) R375 ∗ R339 R331 ∗ R340 ∗ R403 ∗ R340 ∗ R375 ∗ R331 (MX,E51) R478 2.2k 5.6k (MX,E51) 4.7k...

  • Page 39: Schematic Diagram - Main Board (4/4) (Suffix-13)

    CX-JT7 6-18. SCHEMATIC DIAGRAM – MAIN Board (4/4) (Suffix-13) – (Page 36) (Page 37) (4/4) C363 MIC10V R309 R313 100k C437 220p CN304 (AEP,UK) FIL2 FIL1 D-GND -VFL -VFL EVER+10V EVER 10V BUFFER MIC+10V IC304 MIC 10V NJM4565M 4V(SW) RCLK...

  • Page 40: Printed Wiring Boards - Cd Button/Headphone/Microphone Boards

    CX-JT7 6-19. PRINTED WIRING BOARDS – CD BUTTON/HEADPHONE/MICROPHONE Boards – • See page 25 for Circuit Boards Location. :Uses unleaded solder. (MX, E51) MICROPHONE BOARD HEADPHONE BOARD (SUFFIX-11) C302 MAIN PANEL BOARD BOARD CN310 CN105 J401 (Page 34) CN401 (Page 42)

  • Page 41: Schematic Diagram - Cd Button/Headphone/Microphone Boards

    CX-JT7 6-20. SCHEMATIC DIAGRAM – CD BUTTON/HEADPHONE/MICROPHONE Boards – (MX,E51) (SUFFIX-11) CN402 CN105 C301 C302 J401 1000p 1000p J221 MIC IN L-OUT PHONES HP-GND MIC OUT R-OUT (Page 32) HP CTL (Page 43) HP CTL (Page 38) (SUFFIX-13) DISC DIRECT PLAY...

  • Page 42: Printed Wiring Board - Panel Board

    CX-JT7 6-21. PRINTED WIRING BOARD – PANEL Board – • See page 25 for Circuit Boards Location. :Uses unleaded solder. • Semiconductor Location CD BUTTON (Page 40) Ref. No. Location BOARD CN302 PANEL BOARD D101 R618 D201 R943 R117 R116...

  • Page 43: Schematic Diagram - Panel Board

    CX-JT7 6-22. SCHEMATIC DIAGRAM – PANEL Board – • • See page 54 for IC Block Diagram. See page 54 for Waveforms. FL902 FLUORESCENT INDICATOR TUBE JR901 R613 R614 R615 R616 R617 R618 R619 R620 2.2k 2.2k 2.2k 2.2k 2.2k 2.2k...

  • Page 44: Schematic Diagram - Power Board (1/2)

    CX-JT7 6-23. SCHEMATIC DIAGRAM – POWER Board (1/2) – (1/2) (SUFFIX-11) CN501 L-OUT SP-GND R-OUT LINK/MATRIX UNREG VM RYB+ (Page 32) RELAY B+ IN-L A-GND IN-R PW-GND VM(AC) (Page 38) VM(AC) O-POWER (SUFFIX-13) HOLD 0.22 4.7k 6.8k 1SS355TE-17 2.2k CN502...

  • Page 45: Schematic Diagram - Power Board (2/2)

    CX-JT7 6-24. SCHEMATIC DIAGRAM – POWER Board (2/2) – (2/2) D503 MC2838 R539 R529 4.7k ∗ Q501 FP1016 (AEP,UK,CIS) R541 2.2k R537 2SD2439 (MX,E51) D501 R521 MC2836 R543 2.2k 1.8k D510 Q501 R559 ∗ MC2836 3.9k C511 Q507 R505 C521...

  • Page 46: Printed Wiring Board - Power Board - (Aep, Uk, Cis Models)

    CX-JT7 6-25. PRINTED WIRING BOARD – POWER Board – (AEP, UK, CIS models) • :Uses unleaded solder. See page 25 for Circuit Boards Location. MAIN BOARD (Page 35) MAIN BOARD (Page 35) CN307 CN306 POWER BOARD (CHASSIS) JW571 EP502 CN501...

  • Page 47: Printed Wiring Board - Power Board - (Mx Model)

    CX-JT7 6-26. PRINTED WIRING BOARD – POWER Board – (MX model) • :Uses unleaded solder. See page 25 for Circuit Boards Location. MAIN BOARD MAIN BOARD (Page 35) (Page 35) CN307 CN306 POWER BOARD (CHASSIS) CN502 JW571 EP502 CN501 R566...

  • Page 48: Printed Wiring Board - Power Board - (E51 Model)

    CX-JT7 6-27. PRINTED WIRING BOARD – POWER Board – (E51 model) • :Uses unleaded solder. See page 25 for Circuit Boards Location. MAIN BOARD (Page 34) MAIN BOARD (Page 35) MAIN BOARD (Page 34) MAIN BOARD (Page 35) CN307 CN307...

  • Page 49: Printed Wiring Board - Transformer Board - (Aep, Uk, Cis Models)

    CX-JT7 6-28. PRINTED WIRING BOARD – TRANSFORMER Board – (AEP, UK, CIS models) • :Uses unleaded solder. See page 23 for Circuit Boards Location. (AC IN) TRANSFORMER BOARD D906 CN901 JW935 D905 D903 RY902 JW934 JW926 D902 JW909 D904 JW901...

  • Page 50: Printed Wiring Board - Transformer Board - (Mx Model)

    CX-JT7 6-29. PRINTED WIRING BOARD – TRANSFORMER Board – (MX model) • :Uses unleaded solder. See page 23 for Circuit Boards Location. (AC IN) TRANSFORMER BOARD CN901 D905 JW935 D903 JW934 PT902 SUB POWER TRANSFORMER D902 JW909 D904 F902 JW915...

  • Page 51: Printed Wiring Board - Transformer Board - (E51 Model)

    CX-JT7 6-30. PRINTED WIRING BOARD – TRANSFORMER Board – (E51 model) • :Uses unleaded solder. See page 23 for Circuit Boards Location. (AC IN) TRANSFORMER BOARD D901 CN901 JW935 D905 D903 RY901 JW926 JW903 PT902 JW934 SUB POWER TRANSFORMER D902...

  • Page 52: Schematic Diagram - Transformer Board - (Aep, Uk, Cis, E51 Models)

    CX-JT7 6-31. SCHEMATIC DIAGRAM – TRANSFORMER BOARD – (AEP, UK, CIS, E51 models) (AEP,UK,CIS) PT901 ∗ NOT REPLACEABLE: MAIN POWER TRANSFORMER BUILT IN TRANSFORMER (E51) F902 T2.5AL 250V PT901 MAIN POWER TRANSFORMER (E51) (E51) JW907 CN902 F905 S901 T6.3AL (EXCEPT E51)

  • Page 53: Schematic Diagram - Transformer Board - (Mx Model)

    CX-JT7 6-32. SCHEMATIC DIAGRAM – TRANSFORMER BOARD – (MX model) PT901 F902 MAIN POWER TRANSFORMER T2.5AL 250V ∗ NOT REPLACEABLE: BUILT IN TRANSFORMER F905 T8AL 250V JW918 JW905 CN902 VH(AC) VL(AC) JW906 VL(AC) JW912 VH(AC) VM(AC) F906 T8AL VM(AC) 250V...
  • Page 54 CX-JT7 • Waveforms • IC Block Diagrams – MAIN Board – – PANEL Board – – BD Board – – BD Board – IC721 LC78646E-E 1 IC721 4 (RF) (CD Play Mode) qa Q223 (Base) (REC Mode) wa IC901 qs (XT1)

  • Page 55: Driver Board

    CX-JT7 – DRIVER Board – IC701, 712 BA6956AN CONTROL LOGIC – MAIN Board – IC201 HA12237F 93/120 PB-NF1 (L) (HIGH/NORM) MUTE 20 TEST MODE 19 IREF AIN (L) 18 GND BIN (L) 17 ALC DET RETURN SW 16 VCC REC-RETURN...

  • Page 56: Panel Board

    CX-JT7 IC301 M61529FP-D60G 42 41 39 38 37 34 33 32 31 30 TONE CONTROL ELECTRICAL (BASS/MID/TREBLE) VOLUME INPUT BASS BOOST TONE ATT SURROUND VOCAL INTERFACE DPL BUFFER TONE ATT BASS BOOST EXTERNAL INPUT INPUT ATT ELECTRICAL TONE CONTROL VOLUME...

  • Page 57: Ic Pin Function Description

    CX-JT7 6-33. IC PIN FUNCTION DESCRIPTION • MAIN BOARD IC309 BU2099FV (MULTI CONTROLLER) Pin No. Pin Name Description — Ground terminal — Not used DATA Serial data input from the tape mechanism controller CLOCK Serial data transfer clock signal input from the system controller Serial data latch pulse clock signal input from the system controller Recording on/off control signal output terminal “L”: recording...
  • Page 58 CX-JT7 • MAIN BOARD IC310 BU2099FV ( BASS BOOST CONTROLLER) Pin No. Pin Name Description — Ground terminal — Not used DATA Serial data input from the multi controller CLOCK Serial data transfer clock signal input from the system controller...
  • Page 59 CX-JT7 • PANEL BOARD IC201 BU2099FV (LED DRIVER) Pin No. Pin Name Description — Ground terminal — Not used DATA Serial data input from the system controller CLOCK Serial data transfer clock signal input from the system controller Serial data latch pulse clock signal input from the system controller LED drive signal output of the CD indicator “L”: LED on...
  • Page 60 CX-JT7 • PANEL BOARD IC202 BU2099FV (LED DRIVER, TAPE MECHANISM CONTROLLER) Pin No. Pin Name Description — Ground terminal — Not used DATA Serial data input from the LED driver CLOCK Serial data transfer clock signal input from the system controller Serial data latch pulse clock signal input from the system controller LED drive signal output of the DISC DIRECT PLAY 1 indicator “L”: LED on...
  • Page 61 CX-JT7 • PANEL BOARD IC901 LC8767962B-51F7 (SYSTEM CONTROLLER) Pin No. Pin Name Description O-SYS-MUTE Line muting on/off control signal output terminal “H”: muting on RDS serial data input from the tuner unit (AEP and UK models) I-BU1924 DI Not used (Except AEP and UK models)
  • Page 62 CX-JT7 Pin No. Pin Name Description I-B-PHOTO Deck-B tape reel rotating detection signal input from the tape mechanism deck block I-B-HALF Deck-B cassette detection signal input from the tape mechanism deck block “L”: cassette in Segment drive signal output to the fluorescent indicator tube and deck-B mode detection signal S9/I-B-MODE input from the tape mechanism deck block “L”...

  • Page 63: Exploded Views

    CX-JT7 SECTION 7 EXPLODED VIEWS NOTE: • -XX and -X mean standardized parts, so they • Items marked “*” are not stocked since they • Abbreviation may have some difference from the original are seldom required for routine service. Some E51 : Chilean and Peruvian models one.

  • Page 64: Front Panel Section-1

    CX-JT7 7-2. FRONT PANEL SECTION-1 front panel section-2 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 4-245-125-01 KNOB, ROTARY VOLUME 4-245-134-01 GUIDE, LED POWER 4-245-126-11 KNOB, ROTARY JOG 4-245-141-01 GUIDE, LED GRAPHIC EQUALIZER (R) 4-246-528-01 RING (BASS)

  • Page 65: Front Panel Section-2

    CX-JT7 7-3. FRONT PANEL SECTION-2 E51, MX front panel section-3 supplied Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-688-545-11 HEADPHONE BOARD 1-796-486-41 DECK, MECHANICAL (CWM43FR16) 3-229-336-01 SCREW, +BVWH TAPPING (AEP, UK, CIS) 4-245-142-11 SHEET, FL F4 1-796-487-41 DECK, MECHANICAL (CWM43RR23) (MX, E51) X-4955-415-1 KEY (CD) ASSY (DISC CHANGE.

  • Page 66: Front Panel Section-3

    CX-JT7 7-4. FRONT PANEL SECTION-3 front panel section-4 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 4-245-124-01 KEY, RDS X-4955-683-1 KEY (OPE) ASSY 4-245-122-01 KEY, REC (SURROUND. i-BASS. m. X.bB. x. M) X-4955-411-1 KEY (POWER) ASSY (AEP, UK, CIS) X-4955-412-1 KEY (GEQ L) ASSY (HEAVY.

  • Page 67: Front Panel Section-4

    CX-JT7 7-5. FRONT PANEL SECTION-4 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 4-245-115-01 WINDOW, CASSETTE 4-245-010-01 SPR-T, BOX CASS R 4-245-111-01 PANEL, DOOR (MX, E51) 4-242-174-01 HLDR, LOCK 1 4-245-111-11 PANEL, DOOR (AEP, UK, CIS)

  • Page 68: Chassis Section-1

    CX-JT7 7-6. CHASSIS SECTION-1 M731 not supplied supplied chassis section-2 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 4-951-620-41 SCREW (2.6X8), +BVTP 1-693-628-11 TUNER (FM/AM) (E51, MX) 1-693-625-11 TUNER (FM/AM) (UK) 7-685-647-79 SCREW +BVTP 3X10 TYPE2 N-S...

  • Page 69: Chassis Section-2

    CX-JT7 7-7. CHASSIS SECTION-2 supplied supplied not supplied PT901 F902 F906 F905 AEP, UK, CIS supplied The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified. Ref. No.

  • Page 70: Cd Mechanism Deck Section-1 (Cdm74F-K6Bd71A)

    CX-JT7 7-8. CD MECHANISM DECK SECTION-1 (CDM74F-K6BD71A) M741 CD mechanism deck section -2 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 4-243-815-01 TABLE (LOADING) 1-687-134-11 MOTOR (TB) BOARD 4-243-816-01 TRAY 4-218-252-61 SCREW (+PTPWH M2.6), FLOATING 4-218-253-21 SCREW (M2.6), +BTTP...

  • Page 71: Cd Mechanism Deck Section-2 (Cdm74F-K6Bd71A)

    CX-JT7 7-9. CD MECHANISM DECK SECTION-2 (CDM74F-K6BD71A) S711 M751 CD mechanism deck section -3 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 4-218-252-61 SCREW (+PTPWH M2.6), FLOATING 3-016-533-11 WASHER (FR), STOPPER 4-244-034-01 BELT (LOADING) 4-244-108-01 GEAR, SWING...

  • Page 72: (Cdm74F-K6Bd71A)

    CX-JT7 7-10. CD MECHANISM DECK SECTION-3 (CDM74F-K6BD71A) BU-K6BD71A Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark X-4955-707-1 PULLEY (A5) ASSY, CHUCKING 4-227-549-11 INSULATOR 1-471-035-11 MAGNET ASSY 4-227-045-31 SPRING (INSULATOR), COIL 4-231-151-01 STOPPER (BU) 4-231-189-01 PULLEY (B), CHUCKING 4-218-252-61 SCREW (+PTPWH M2.6), FLOATING...

  • Page 73: Base Unit Section (Bu-K6Bd71A)

    CX-JT7 7-11. BASE UNIT SECTION (BU-K6BD71A) M702 M701 The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified. Ref. No. Part No. Description Remark Ref. No. Part No.

  • Page 74: Electrical Parts List

    CX-JT7 SECTION 8 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 parts list may be different from the parts speci- are seldom required for routine service.
  • Page 75 CX-JT7 CD BUTTON Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark FB806 1-550-907-21 FERRITE R805 1-216-809-11 METAL CHIP 1/10W FB807 1-550-907-21 FERRITE R806 1-216-809-11 METAL CHIP 1/10W R807 1-216-809-11 METAL CHIP 1/10W FB808 1-550-907-21 FERRITE R817 1-216-827-11 METAL CHIP 3.3K...
  • Page 76 CX-JT7 DRIVER HEADPHONE MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-687-135-11 DRIVER BOARD A-4734-189-A MAIN BOARD, COMPLETE (AEP, UK) A-4734-797-A MAIN BOARD, COMPLETE (CIS) ************* A-4738-393-A MAIN BOARD, COMPLETE (MX, E51) < CAPACITOR >...
  • Page 77 CX-JT7 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C390 1-162-953-11 CERAMIC CHIP 100PF C315 1-126-963-11 ELECT 4.7uF C391 1-162-953-11 CERAMIC CHIP 100PF C316 1-126-963-11 ELECT 4.7uF C392 1-162-953-11 CERAMIC CHIP 100PF C317 1-126-964-11 ELECT...
  • Page 78 CX-JT7 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark CN307 1-778-982-21 CONNECTOR, BOARD TO BOARD 13P JR303 1-216-864-11 SHORT CHIP CN310 1-564-707-11 PIN, CONNECTOR (SMALL TYPE) 5P JR304 1-216-864-11 SHORT CHIP CN311 1-568-828-11 CONNECTOR, FFC 9P...
  • Page 79 CX-JT7 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark Q331 6-550-289-01 TRANSISTOR 2SA1235F Q372 8-729-120-28 TRANSISTOR 2SC1623-L5L6 R317 1-216-825-11 METAL CHIP 2.2K 1/10W Q373 8-729-142-46 TRANSISTOR 2SC2001-LK R318 1-216-825-11 METAL CHIP 2.2K 1/10W Q491 8-729-120-28 TRANSISTOR...
  • Page 80 CX-JT7 MAIN MICROPHONE MOTOR (LD) MOTOR (TB) Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 0 R434 R375 1-216-833-11 METAL CHIP 1/10W 1-215-891-11 METAL OXIDE (AEP, UK, CIS) R455 1-218-717-11 METAL CHIP 1/10W R378 1-216-833-11 METAL CHIP...
  • Page 81 CX-JT7 PANEL Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark A-4734-180-A PANEL BOARD, COMPLETE (AEP, UK) C505 1-126-916-11 ELECT 1000uF 6.3V A-4734-284-A PANEL BOARD, COMPLETE (MX, E51) C506 1-164-156-11 CERAMIC CHIP 0.1uF A-4734-792-A PANEL BOARD, COMPLETE (CIS)
  • Page 82 CX-JT7 PANEL Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark D606 8-719-820-05 DIODE 1SS181 JR802 1-216-864-11 SHORT CHIP D607 8-719-820-05 DIODE 1SS181 JR810 1-216-864-11 SHORT CHIP D608 8-719-820-05 DIODE 1SS181 JR901 1-216-864-11 SHORT CHIP JR902 1-216-864-11 SHORT CHIP...
  • Page 83 CX-JT7 PANEL Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R115 1-249-417-11 CARBON 1/4W R308 1-249-425-11 CARBON 4.7K 1/4W (AEP, UK) R116 1-249-393-11 CARBON 1/4W R309 1-249-427-11 CARBON 6.8K 1/4W R119 1-216-864-11 SHORT CHIP R311 1-249-413-11 CARBON...
  • Page 84 CX-JT7 PANEL Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R902 1-216-845-11 METAL CHIP 100K 1/10W R501 1-216-190-00 RES-CHIP 1/8W R903 1-216-845-11 METAL CHIP 100K 1/10W R502 1-216-841-11 METAL CHIP 1/10W R904 1-216-845-11 METAL CHIP 100K...
  • Page 85 CX-JT7 PANEL POWER Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark X902 1-795-880-11 VIBRATOR, CERAMIC (8.64MHz) R962 1-216-821-11 METAL CHIP 1/10W ************************************************************** R963 1-216-821-11 METAL CHIP 1/10W R964 1-216-833-11 METAL CHIP 1/10W A-4734-182-A POWER BOARD, COMPLETE (AEP, UK, CIS)
  • Page 86 CX-JT7 POWER Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 8-719-988-61 DIODE 1SS355TE-17 C518 1-126-957-11 ELECT 0.22uF 8-719-988-61 DIODE 1SS355TE-17 C519 1-164-733-11 CERAMIC CHIP 820PF C520 1-164-733-11 CERAMIC CHIP 820PF 8-719-988-61 DIODE 1SS355TE-17 C521 1-126-959-11 ELECT 0.47uF...
  • Page 87 CX-JT7 POWER Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-216-839-11 METAL CHIP 1/10W 6-550-289-01 TRANSISTOR 2SA1235F 1-216-839-11 METAL CHIP 1/10W 6-550-289-01 TRANSISTOR 2SA1235F 1-216-827-11 METAL CHIP 3.3K 1/10W Q501 6-550-291-01 TRANSISTOR FN1016 (AEP, UK, CIS)
  • Page 88 CX-JT7 POWER Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-216-073-00 RES-CHIP 1/10W 0 R503 1-245-545-11 METAL OXIDE 0.22 1-216-833-11 METAL CHIP 1/10W (MX, E51) 0 R504 1-216-835-11 METAL CHIP 1/10W 1-245-545-11 METAL OXIDE 0.22 1-216-833-11 METAL CHIP...
  • Page 89 CX-JT7 POWER SENSOR TRANSFORMER Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R550 1-216-817-11 METAL CHIP 1/10W 1-687-132-11 SENSOR BOARD (MX, E51) ************* R550 1-216-818-11 METAL CHIP 1/10W (AEP, UK, CIS) < CONNECTOR > R553 1-216-838-11 METAL CHIP...
  • Page 90 CX-JT7 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark MISCELLANEOUS ************** 1-769-889-11 WIRE (FLAT TYPE) (7 CORE) 1-773-322-11 WIRE (FLAT TYPE) (31 CORE) 1-769-976-11 WIRE (FLAT TYPE) (13 CORE) 1-769-919-11 WIRE (FLAT TYPE) (9 CORE) 1-827-399-11 WIRE (FLAT TYPE) (3 CORE)
  • Page 91 CX-JT7 MEMO...

  • Page 92: Revision History

    CX-JT7 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...

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