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and overviews
6 Fault finding trees, diagrams and overviews L9.1A 15

6 Fault finding trees, diagrams




START Remark :
In normal operation the
Connect a pattern generator to the arial input.
Red LED lights in half
Set Patt.gen. to 475,25 MHz, colourbar, stereosound,
intensity and in
PAL B/G (for France SECAM l).
standby-mode the LED
Put the Mainsswitch : on.
lights in full intensity
In normal conditions the set will start with the Red LED
blinking for one second in full intensity, one time then
after a few seconds more in half intensity while the
picture and sound will appear.




1 1 1 1
Does the red LED Does the red LED Check/Replace
Is the Power supply Any secondary
blink for one second in No light in full intensity No No No (A1); No (A1); SW0231,F1500,D6505
hicking ? voltage present ?
full intensity, one time continuously present? Note: If F1500 is defective, then also check R3503
? ?
Yes
Yes Yes
Yes
1 7 1 3 1 1 1 1
Check
1 1 1 D (A1); (A1);
(A7); , Check/Replace
3V3, startpuls No Voltage No
Do picture and sound No A Yes
The load of the power supply
is too high. Check/Replace present? present?
(A1); D6540,C2540,D6510,
R3510,R3529
appear properly
? Isolate each branch of the load TS7603,TS7604
one by one, until the hicking IC7600 Yes
disappear. X1660
Yes 1 1 1 A
Continue with the fault finding (A8);LED6690 Yes
for the branch, which causes Check/Replace
Ensure communication
the overload. (A1); IC7520
with the RC, 1 1 1 1
The branches are: R3525
Check/Replace
(A1); AudioSupply
(A8);IC7680 Check/Replace (A1); voltage on
+VBATT No
Put the set into the (A1); TS7518,L5552 TR5545 pin9
MainSupply
Service Default Mode present ?
Vaux
either via the DST or by
pressing the buttons on
Yes
the RC in the following
order :062596, 1 1 1 A
or via the service pins
Check/Replace
An error code is (A1); L5540,D6540,C2540
indicated by the blinking Vaux,F1572,L5573,D6560
LED via the SDM. IC7581
n-times blinking means Note 1:
error n.
See also chapter 5.5 for IRIS SYMPTOM CODE
detailled information

1 1 1 A

1 1 1 A
Set is OK
Check / correct Options
Is there an error
list via CSM see No
indication ? Condition Main symptom Extended symptom
chapter 5.5 of this
manual for details code code code

Yes



B Note 2:
(A1) means Drawing A1
means Test point P1



CL 86532104_034.eps
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6 Fault finding trees, diagrams and overviews L9.1A 16



A
Ensure communication
with the RC,
Check/Replace No picture
(A8);IC7680 (Colour missing) Picture OK
Put the set into the No Menu NO Picture Deflection not OK
Menu OK
Service Default Mode Black screen NO Sound Pictures are not
NO Sound
either via the DST or by Sound OK Menu OK symetrical and unstable
(l,r,l+r)
pressing the buttons on
the RC in the following 1 3 1 0
order :062596, Check / Replace 1 2 1 0
or via the service pins (B); (A2);L5480,Conn.0220 NICAM/2CS/ BTSC Check / Replace C
Heater / Filaments No (B);Conn.0244,R3341, Multimono (TDA9851) (A5);Antenna,
No
OK R3342,CRT-Socket, (MSP3415D) VT_Supply,D6008,
An error code is ? L5342,CRT (A6);X1205..X1208
indicated by the blinking
LED via the SDM. 1 5 1 0
n-times blinking means Yes Check / Replace
error n. (A5);,SIF (A5);
1 3 1 0 No (A5); IC7250-A, No 1 1 1 A
See also chapter 5.5 for Ok OK
TS7266
detailled information Adjust VG2 ? ? Sound and Picture Check / Replace
Check / Replace No
(B);VG2 from external source IC7250
No (A2); TR5445, Yes Yes OK ?
OK
(B);R3343,C2343 1 5 1 0
?
CRT Yes
(A10);
Is there an error Check / Replace (A9);,
.. No 1 2 1 0
indication (A10); IC7833 , OK
Yes OK
? ? Check / Replace
1 3 1 0 ?
No
Tuner1000
Yes
Check/Replace Yes Yes
If the mainsupply or (A3);, No (A3);IC7401,
EHT is missing, then OK D6401.C2403,D6402
? 1 5 1 0 1 5 1 0
the error message may (A12);
not be reliable. So in Check / Replace Check / Replace
..
this state check/replace No (A11);TS7904..TS7910 (A9);IC7821
Yes OK
the (A12);IC7050..IC7053 IC7822
1 3 1 0 ?
components of the
mainsupply and EHT in Yes
the first place see
(A6); Check/Replace 1 5 1 0
schematics ; No
(A6);IC7250-B/C Check / Replace
(A1), (A2) and
OK (A13);Conn.0234,
(A4);IC7250-D
Conn.0215
Speakers
Yes
1 3 1 0
B
Check/Replace
(B);
No (B);Conn0245,IC7330,
OK
CRT Socket


Yes

1 3 1 0

Check/Replace
(B);CRT
CL 86532104_035.eps
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6 Fault finding trees, diagrams and overviews L9.1A 17




C

Horizontal section
Picture unstable Vertical section
horizontally. Vertical picture is
Picture width too too small or unstable
small.
No sync.
E/W not ok

1 3 5 0
1 3 5 0 (A4);, No Check / Replace
OK (A4); IC7250
(A4) ; , Check / Replace ?
No
(A4);IC7250
OK
? Yes
1 7 1 8
Yes Check / Replace
(A3);,, (A3); IC7401 ,
1 3 5 0 OK No R3401..R3403,
(A2);, Check / Replace ? R3409
,, No (A2);TS7461,TS7460, D6401,C2403
TS7470,
OK ? Yes

Yes
1 7 1 8
Check / Replace
1 3 3 A (A3);Vertical defl. coil
Check / Replace C0222
(A2);L5457,C2458,
C2457,L5463,
L5465,L5470
L5471 CL 86532104_036.eps
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6 Fault finding trees, diagrams and overviews L9.1A 18



B


ERR 1, ERR 4
ERR 8 No ERR 2 No ERR 7 No ERR 5 No No No ERR 10
or 6 3, 12 and/or
11
Yes Yes Yes Yes Yes
1 7 1 8 1 1 1 D 1 7 1 8 1 1 1 A Yes
1 7 1 X
+5 V Protection
uP Internal RAM High beamcurrent , General I 2C error. BIMOS error. ERROR 1 ERROR 3 Check EEPROM error
error E/W and Horizontal
(A2); +VLotAux+5V
Protection. Check SCL and SDA The error is detected,
1 7 1 8 - When I 2C
Check / replace line of all units for because there is no
- When the High signals or the
(A7); IC7600 shortcircuit to ground or communications on I 2C 1 1 1 D
beamcurrent protection X-Ray/Over-voltage +5D are missing
to each other. of the BIMOS ERROR 4 ERROR 11
is started, fly-back lines Protection. Vertical / Frame on IC7601 the set
Message : Protection. can function, but
will be visible for 15 sec. (USA version only)
The Error code can ERR 4 6 0 0 0
before the set is really in will not be able to
only be read by
protection. - When the X-Ray - Before the proctection 1 7 1 X 1 2 1 0 store any data.
putting the TV set into CheckReplace
- When E/W or protection is started, the is really actived, a Message :
the SDM mode. The (A4,A5) ; the
Horizontal protection is set will hicc-up until the horizontal line will be Fault in audio section I2C Tuner error ERR 10 0 0 0 0
LED will blink 7 times. +8VBIMOS and the I 2C
started, the set will hicc- voltage at pin 50 of visible for 3 sec.
lines pin7,8 of IC7250 - During Vertical / Check/Replace
up for 4sec. before the IC7250 becomes >3.9 In this situation the set - It is possible
Check / replace
protection is really Volts. At the voltage of Frame protection the turns on without sound. that during +5V (A7); +5VD
(A5); Tuner1000 pin4,5
activated. 3.9 V the set is put in EHT will not be able to Message : protection Error 4 IC7601 pin 5,6
(A6); IC7250-C pin7,8
- During E/W or protection mode. turn on and so the ERR 4 0 0 0 0 will be reported
(A7); IC7600 pin49,50
Horizontal protection - During x-ray protection VlotAux5V to the Tuner too
(A7); IC7601 pin5,6
the EHT will not be able the EHT will not be able and Sound IC is not Check/Replace Message :
(A9); IC7821 pin1,24
to turn on and so the to turn on and so the available. As such (A10); +VlotAux+5V, ERR 11 0 0 0 0
(A10); IC7833 pin9,10
VlotAux5V to the Tuner VlotAux5V to the Tuner ERROR 4 and ERROR IC7833 pin9,10.
and Sound IC is not and Sound IC is not 11 will be reported too. CheckReplace
Replace the item, which
available. As such available. As such Message : (A5); Tuner1000
causes the error.
ERROR 4 and ERROR ERROR 4 and ERROR ERR 11 4 3 0 0
11 will be reported too. 11 will be reported too.
Message : Check / replace
ERR 11 4 2 0 0 (A3);IC7401,
C2403,D6401
Check/Replace Conn0222 ERROR 9
(CRT); R3340,
+200V supply
or New micro controller or
E/W,Horizontal Prot. EEProm.Default values
(A2);Conn.0221 were loaded. Re-align
ERROR 12
the set. If the problem
persists, then IC7601
is defective

Black current calibration loop instable (protection)
CL 86532104_037.eps
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6 Fault finding trees, diagrams and overviews L9.1A 19


A1 POWER SUPPLY A2 HORIZONTAL DEFLECTION B CRT
for 140V VBATT
5545 5445
15 5550
6550 5577 +VBATT 5551 MAIN SUPPLY MAIN SUPPLY 3453 5451 3 EHT EHT
ANODE CRT
16 5576 FOCUS FOCUS
2551 2450 FOCUS
VG2 VG2
for 130V VBATT ON A1 to ON A2 to VG2
3543 3462
discharge 3485 0220 0244 3340
3546 3482 6485 VIDEO SUPPLY +200V
circuit 5 2 2
6542 +200VA
POWER 3571 2340
TRAFO for 2x3 WATT / 5 WATT AUDIO 2485 3341
6570 A12 AUDIO AMPLIFIER
1573 5480
11 5575 5572 AUDIO SUPPLY 7 filement 4 4
to CRT
AUDIO SUPPLY
6590 VAUX filement
2.5A 2571 To 3950
3342
for 2x2 WATT AUDIO
1573 6590 6582 A2 HORIZONTAL DEFLECTION
11 5575 5572
A5 TUNER
2.5A 2571 VAUX
To anode 6449 6487 3488 VLOT AUX +50V 3442
11 VT_SUPPLY
SPMS LOT to (9-1000)
for 2x1 WATT AUDIO 6008 TUNER
VT_SUPPLY
-/C33
1571 5572 6580 6582 A7 CONTROL
10 2487
T1A VAUX 3639
2577 7603
3V3 A3 VERTICAL DEFLECTION
for 1x1 WATT AUDIO 4654 3632 3633 VLOT AUX +50V
3491 to 9401
1571 5572 6580 9509
10
6601 A8 FRONT CONTROL 6
6490 VLOT AUX -11V VLOT AUX -11V
T1A 2577 -/C3V9 to 4-7401
VAUX-1 3657 +5D 2489
+5D
3492
6606
-/C4V7
6560 1572 3486
14 5573 VAUX
6486 VLOT AUX -11V
T1A 2561 9 VLOT AUX +11V
ON A1 to
A5 TUNER + VIDEO IF A4 SYNCHRONISATION to 2-7401
2486
3585 7251 ON A2 to
VAUX 3 2 +8V AUDIO +8V BIMOS 3487
+8V BIMOS E/W Circuit
5202 and 7481,7482
A1 POWER SUPPLY
1
STAND-BY to DEGAUSSING
STB 7254 A6 VIDEO PROCESSING
CIRCUIT 7256

+8V BIMOS
5821 +8VA
A9 BTSC DECODER
7823 5822
2843 A10 NICAM + 2CS DECODER 2-7821


+8VA


A11 SMART SOUND A5 TUNER + VIDEO IF
3490 7480
6488 VLOT AUX +5V 5000
8 1 3 +5V
to 6-1000
+8VA (TUNER)
2


IIC BUS INTERCONNECTION DIAGRAM A9 BTSC DECODER
A10 NICAM + 2CS DECODER
+8VA 5831
A7 CONTROL A5 TUNER + A6 VIDEO A9 BTSC A10 NICAM+ +5VA
5832
3651
VIDEO/IF PROC. DECODER 2CS DEC. +5VB
50 SDA
3652
7600 49 SCL
SAA5565 A14 REAR I/O CINCH
3655 3654 3001 3000 3248 3247 3828 3827 3842 3841
VLOT AUX +5V
to 5101

CL 86532104_063.eps