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PHILIPS AA5 (AB) Chassis
Electrical Adjustments
Cont'd
Counter + "S" for SDM
active + prog nr.
* P1-P2-P3, etc: Test points for the power
supply
* L1-L2-L3, etc: Test points for the line drive
and line output circuitry
* F1-F2-F3, etc: Test points for the frame drive
Service Menu (SM)
and frame output circuitry
* S1-S2-S3, etc: Test points for the synchronisa-
Entering the service menu can be done in 2
tion circuitry
ways:
* V1-V2-V3, etc: Test points for the video
1. From service default mode by simultaneously
processing circuitry
pressing the buttons "-" and "+" buttons on the
*A1-A2-A3, etc: Test points for the audio
local keyboard.
processing circuitry
2 From normal operation mode by pressing the
* C1-C2-C3, etc: Test points for the control
button "ALIGN" on the DST RC7150.
circuitry
* T1-T2-T3, etc: Test points for the teletext
Leaving the service menu to normal operation
processing circuitry
can be done in 2 ways:
1. Via the stand-by on the remote control
The numbering is done in a for diagnostics
2. Via mains switch "off"
logical sequence; always start diagnosing within
For reading a new option setting, the set must
a functional block in the sequence of the
be switched "on" by the mains switch (so not by
relevant test points for that functional block.
stand-by as by then the EEPROM settings are
not read).
Service default mode (SDM)
The service default mode is a pre-defined mode
Functions of the service menu (see Fig 8.2);
which can be used when for faultfinding
1. Software version of the microprocessor used
(especially when the TV gives no picture at all).
in that typical set is displayed in the right top
All oscillograms and DC voltages in this service
corner
manual are measured in the service default
2. A counter in the middle of the screen indicate
mode.
the normal operation hours of the set in a
hexadecimal code (every time the set is
Entering the service default mode can be done
switched "on" the counter is incremented by 1
in 2 ways:
hour, so +1 at the counter).
1. By short-circuiting the service pins S1 and S2
3. The "S" in the middle of the screen next to the
of the microcomputer (pin 7 of IC7600) while
counter indicate that the set is in the service
switching on the set with the mains switch
default mode
2. From normal operation mode by pressing the
4. Error code history; The 5 last different error
button "DEFAULT' on the DST (Dealer
codes occurred are stored in the EEPROM
Service Tool) RC7150.
memory; last error code detected will be
displayed on the right side (see for an
Leaving the service default mode to normal
overview of all possible error codes Fig. 8.4),
operation can only be done by the stand-by on
so e.g.:
the remote control (so not via mains switch "off";
after mains switch "off" and then "on" again the
0 0 0 0 0
set will start up in the Service Default Mode
means no error codes present in the buffer
again to enable easy faultfinding).
0 0 0 0 3
Functions of the service default mode
means one error code present in the buffer;
(see Fig. 8.1):
error code 3
1. All analog settings (volume, contrast,
brightness and saturation) are in the mid
0 0 0 3 2
position (in µC with V1 .0 the volume in the
means two error codes present in the buffer;
SDM is set at 25%, from V1 .1 onwards the
last detected error code is error code 2,
volume in the SDM is set at 50%).
previous detected error code is error code 3
2. For VST sets are to program number 1
indicated in the right top corner
The error code history buffer is cleared as soon
3. For PLL sets are tuned to 475.25 MHz
as the Service Menu is left by the stand-by
4. Delta volume settings are not used (delta
command. In case the Service Menu is left by
volume setting per program in reference with
the mains switch "off" the error code history
the PP volume setting which is valid for all
buffer will not be cleared.
programs)
5. OSD error message (present available error
Counter +"5" for SM
code) is displayed continuously
active +software version
6. Store open and store close commands will act
Error code history
as search and auto store
Option setting bar
7. Automatic switch off function (set switches
"off" after iS minutes no DENT) will be
switched off
8. Hotel mode will be disabled
9. All other functions remain normal controllable
5.Option setting;
10.A counter in the middle of the screen indicate
The options of the set can be changed in the
the normal operation hours of the set in a
service menu. In the 2 bottom lines the options
hexadecimal code (every time the set is
are given. Control of the options is with the
switched "on" the counter is incremented by 1
following keys on the remote control:
hour, so +1 at the counter).
11.An "Sin the middle of the screen (next to the
* PROGRAM +/-
counter) indicate that the set is in the service
default mode
Select the option to be changed;
Via the "PROGRAM +/-" button to option to be
changed can be selected by scrolling through
Safety Parts / Electrical Adjustments ...Cont'd / Difference Tables / 110
Power Supply Diagram / Separate Control Diagram / Deflection Diagram / CRT PCB (14/15/17/21" mini neck) / CRT PCB (20/21" narrow neck)
Synchronisation Diagram / SVHS Connections Diagram / Waveforms / Text Diagram / Tuner IF Diagram / Video/Audio Diagram
2
the possible options in the upper row from left to
right (via the "PROGRAM +" button) or from
right to left (via the "PROGRAM -" button). The
0023 S
1
selected option will be displayed in the upper
row, the present "Y" or "N" status of that option
(see table 8.3) will be blinking in the bottom row
(when arrived at the end of the row the scrolling
will be continued at the other side).
Fig. 8.1
* MENU +/-
Change the selected option: via "MENU +/-"
buttons the selected option can be changed.
The selected Y (yes) or N (no) blinks and via
either "MENU +" or the "MENU you toggle
through the "Y" or "N" possibility.
The options (both the changed and the not-
changed options) are stored in the EEPROM as
soon as the service menu is left (by stand-by or
mains switch "off"). The new option settings are
only read after mains switch "on" (so not after
switching on the set from stand-by mode).
The following table indicates the possible
options and there technical consequences:
Text displayed in
In case the "N" or
the upper option row
"Y" blinks, it can be
in the service menu
changed
SINGLE
NN
SYSTEM I
NY
SYSTEM BG+L
YN
SYSTEM BG+L+l
YY
PLL TUNER
N
Y
NO TXT
NN
1 p TXT
NY
4P TXT
YN
16/9 SWITCH
N
Y
S-VIDEO
N
Y
SCART
N
Y
SHARPNESS
N
Y
LOCAL MENU
N
Y
40 PROGRAMS
N
Y
SLEEPTIMER
N
Y
FOR GERMANY
N
ONLY
Y
Fig. 8.3
Error messages
The microcomputer also detects errors in
circuits connected to the I 2C (Inter IC) bus.
These error messages are communicated via
OSD (On Screen Display) and a flashing LED
0023 S 1.0
both in normal operation and in the service
menu (error code history buffer):
0 0 0 3 2
- SYSTEM 80 +
1. In normal operation;
In normal operation both the "OSD error
YNNYYNNNYYYN
message" and the "LED error" indication will
display the present detected error. The display-
Fig. 8.2
ing of both the OSD and the LED error indica-
tion will only take a limited time.
2. In the service default mode;
In the service default mode both the "OSD error
message and the "LED error" indication will
display the present detected error. In the service
default mode both the OSD and the LED error
indication will be displayed permanently.
3. In the service menu;
In the service menu both the "OSD error
"OSD error
"OSD
"LED error"
message"
error
"on/off" in SEC
(normal
number"
operation)
(service
menu)
No indication
0
No blinking LED
ERROR: RAM
1
1 sec on / 1 sec
off
ERROR: BUS
2
2 sec on / 2 sec
off
ERROR:
3
3 sec on / 3 sec
EEPROM
off
ERROR:
4
4 sec on / 4 sec
TELETEXT
off
ERROR:
5
5 sec on / 5 sec
TUNER
off
Fig. 8.4
Counter + "S" for SM
active + software version
Error code history
Reset all volume/
program settings
The technical consequence
Hotel mode
for the selected option
* Hotel mode "on"
For a PAL EG only set
The hotel is activated when pressing simultane-
For a PAL I only set
ously the "MENU" button on the local keyboard
For a PAL BG + SECAM LL' set
and the "SLEEPTIMER or OSD" button on the
For a PAL BGI or PAL BGDKI + SECAM LL' set
remote control while program 38 is selected for
For a VST tuner set
at least 3 seconds.
For a PLL tuner set
When the hotel mode is activated, this is
For a set without teletext
indicated by a "H+" on the OSD (this will be
For a set with 1 page WST teletext
displayed until the set is switched of by the
For a set with 4 page FLOF teletext
mains switch or via stand-by).
Disable 16/9 switching possibility
* Hotel mode "off"
Enable 16/9 switching possibility
Repeat above mentioned procedure once again.
For a set without SVHS connectors
When the hotel mode is de-activated, this is
For a set with SVHS connectors
indicated by a "H-" on the OSD (this will be
For a set without a scart connector
displayed until the set is switched of by the
For a set with a scart connector
mains switch or via stand-by).
Note: The SCART option can only be changed when the S-VIDEO
* Functions of the hotel mode
option is "N"
- The volume present on the moment the hotel
Disable sharpness control
Enable sharpness control
No ring menu after pressing
- The install mode can not be opened (the
"MENU" on the local keyboard
Ring menu after pressing "MENU" on the local keyboard
70 programs can be stored
- The delta volume menu can not be entered.
40 programs can be stored
- PP (personal preference) can not be stored
Disable sleeptimer function
Enable sleeptimer function
Disable ATS function
- At switch "on" (by mains switch or remote
Enable ATS function (only works when ATS software is presentl
Service Information
1. New chassis for 14"-15"-17"-21" mini neck
number" (in the error code history) and the "LED
error" indication will display the present detected
error. In the service default mode both the OSD
and the LED error indication will be displayed
continuously.
Reset volume/program (delta volume) for all
programs at once
It is also possible to leave the service menu with
the MENU button. After one time pressing the
MENU button in the service menu, a new menu
is entered (see Fig. 8.5) in which the volume/
programs-settings (also called delta volume
settings) of all programs can be deleted. In case
YES is selected via the MENU + button, all
volume/program-settings are deleted at once.
To conclude: For 14"-15"-17"-21" mini neck and
After another time pressing the MENU button
20"-25"-28" narrow neck AA5 sets with PM/QG
the TV will switch to normal operation (when the
code 05 and higher, use the AA5 AB service
service menu is entered via the pins S1 and S2)
manual (4822 727 20783 up to and included
or service default mode (when the service menu
4822 727 20788) together with this service
is entered with the DST).
information.
°
EW Panel Diagram / Fault Finding Guide / Controls Diagram
°
2. 110
East/West correction panel for 25"
Error
Possible
and 28" AA5 AB chassis (diagram C)
description
defective
For the 25 and 28" AA5 sets a 110° panel is
component
needed for E/W correction. This panel is
allocated on the right hand side of the chassis
(seen from the rear). The panel inclusive the
No error
--
bracket can be released from the heatsink by
µC error
pulling it back. The panel itself can be taken out
IC7600
of the bracket by releasing the catching lips. To
General 1
2
C
1
2
C bus is
put the main carrier in the service position (see
service manual), the 110° panel has to be
blocked
EEPROM error
IC7685
released first and put aside of the main carrier.
In this service information the description, the
Teletext error
IC7700/7702 or
adjustments, the PWB and the spare parts list of
option wrong
110° panel are published.
PLL tuner error
PLL tuner or
option wrong
Description E/W panel 25' and 28" AA5 AB
chassis (diagram C):
E/W correction is in this panel based on the
diode-modulator principle. This panel consists of
0023 S
1.0
D6401-D6402-C2403 and C2404. By modulat-
ing the voltage on the cathode of D6402, the
0 0 0 3 2
current through the horizontal deflection coil is
-
RESET VOL/PROG +
modulated. As this is done by a parabolic-
NO
YES
shaped voltage, E/W distortion is corrected. This
parabolic-shaped voltage is derived from the
Fig. 8.5
sawtooth-shaped voltage of the frame deflec-
tion. This is done by transistor T57403. E/W
correction is adapted for 4/3 and 16/9 mode by
Transistors T57405 and T57406. Coil 5401,
R3402, R3423 and R3424 are for the linearity
correction. R3402, R3423 and R3424 are for the
linearity correction. D6404, R3403 and C2402
compensate the Mannheim effect.
Transformer 5402 takes care for optimal
functioning of the diode-modulator. A too high
beam-current influences the EHT-voltage and
will in this way distortion the picture. This is
corrected by feeding the beam-info to T57402.
Adjustments:
•
R3421 takes care for the vertical picture shift.
•
R3411 is for adjusting the picture-width.
•
R3413 is for correcting the E/W distortion.
3. Separate control panel AA5 AB chassis
(diagram D)
mode was switched "on" is the maximum
The separate controls panel (diagram D) is
volume level in the hotel mode.
allocated underneath the picture tube. To
release the panel first the main carrier should be
message "LOCKED" will be displayed for 3
in its service position. After that the fixing screw
seconds if a store open command is given).
of the bracket holding the separate control panel
can be loosened. By then, the panel the
separate control panel can be taken out of its
(the message "LOCKED" will be displayed for
bracket. In this service information the PWB and
3 seconds if a PP-store command is given).
the spare parts list of the separate control panel
is published.
control) program number 1 will always be
Separate control panel is in functionality equal
selected.
to the controls on the main carrier. The following
selection table is valid:
1 speaker 16Ω
1 H34 - 2H34
(neck diameter 20 mm) and 20-25-28" narrow
neck (neck diameter 30 mm) AA5 sets
In 14"-15"-17"-21" mini neck and 20"-25"-28"
4. Difference tables
narrow neck AA5 sets with production code
Comparing the diagrams published in the AA5
PM/QG 05 and higher, a new power supply is
AB service manual (4822 727 20783 ... 4822
introduced. This new power supply is the
727 20788) there are several value changes for
SMPS power supply of the AA5 AB, in stead
the different screen sizes. This different values
of the SOPS power supply of the AA5 AA. As
are published in the following difference tables.
a result the AA5 AB service manual can be
used (on the rear side of these sets, AA5 AB
See Next Page....
is indicated) except for some component
values. These different component values and
there service codes are indicated in this
service information. The PWB is the same as
in the AA5 AB service manual.
2 speakers 8Ω in series
1H34 - 3H34 speaker right
1H35 - 3H35 speaker left
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