Philips L9.1E Schematic
6 Fault finding trees, diagrams
6 Fault finding trees, diagrams and overviews
and overviews
START
Connect a pattern generator to the arial input.
Set Patt.gen. to 475,25 MHz, colourbar, stereosound,
PAL B/G (for France SECAM l).
Put the Mainsswitch : on.
In normal conditions the set will start with the Red LED
Remark :
In normal operation the
Red LED lights in half
intensity and in
standby-mode the LED
lights in full intensity
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.
17L9.1E
Does the red LED
blink for one second in
full intensity, one time
?
Yes
Do picture and sound
appear properly
?
No No
light in full intensity
continuously
?
Does the red LED
No
Yes
A
Yes
Ensure communication
with the RC,
Check/Replace
(A8);IC7680
Put the set into the
Service Default Mode
either via the DST or by
pressing the buttons on
the RC in the following
order :062596<MENU>,
or via the service pins
An error code is
indicated by the blinking
LED via the SDM.
n-times blinking means
error n.
See also chapter 5.5 for
detailled information
Is the Power supply
hicking ?
Yes
1 11 D
The load of the power supply
is too high.
Isolate each branch of the load
one by one, until the hicking
disappear.
Continue with the fault finding
for the branch, which causes
the overload.
The branches are:
(A1);AudioSupply
+VBATT
MainSupply
Vaux
1 11 1
No No
1 17 3 1 11 1
Any secondary
voltage present ?
Yes
Check
(A7); <C1>,<C4(reset)>
3V3,
Check/Replace
No
(A1); <P1>
present?
Yes
(A1); <P2>
startpuls
present?
Note: If F1500 is defective, then also check R3503
(A1);<P3>
No No
Voltage
present?
Check/Replace
(A1); SW0231,F1500,D6505
(A1);D6540,C2540,D6510,
TS7603,TS7604
IC7600
X1660
(A8);LED6690
Yes
1 11 A
Yes
Check/Replace
1 11 1
Check/Replace
(A1);TS7518,L5552
No
(A1); voltage on
TR5545 pin9
(A1);IC7520
R3525
present ?
Yes
1 11 A
Check/Replace
(A1);L5540,D6540,C2540
Vaux,F1572,L5573,D6560
IC7581
Note 1:
IRIS SYMPTOM CODE
Check/Replace
R3510,R3529
Set is OK
Check / correct Options
list via CSM see
chapter 5.5 of this
manual
for details
No
Is there an error
indication ?
Yes
B
Condition
code
1 11 A
1 11
Main symptom
Note 2:
A
Extended symptom
code
(A1) means Drawing A1
<P1> means Test point P1
CL 86532104_034.eps
code
190299
6 Fault finding trees, diagrams and overviews
A
Ensure communication
with the RC,
Check/Replace
(A8);IC7680
Put the set into the
Service Default Mode
either via the DST or by
pressing the buttons on
the RC in the following
order :062596<MENU>,
or via the service pins
No
An error code is
indicated by the blinking
No picture
(Colour missing)
No Menu
Black screen
Sound OK
(B);
Heater / Filaments
OK
?
1 13 0
Check / Replace
(A2);L5480,Conn.0220
No
(B);Conn.0244,R3341,
R3342,CRT-Socket,
L5342,CRT
LED via the SDM.
n-times blinking means
error n.
See also chapter 5.5 for
detailled information
Yes
(B);VG2
OK
?
1 13 0
Check / Replace
No
(B);R3343,C2343
Adjust VG2
(A2);TR5445,
CRT
Is there an error
indication
?
Yes
1 13 0
Yes
Check/Replace
If the mainsupply or
EHT is missing, then
the error message may
(A3);<F3>,<F4>
OK
?
No
(A3);IC7401,
D6401.C2403,D6402
not be reliable. So in
this state check/replace
the
components of the
Yes
1 13 0
mainsupply and EHT in
the first place see
schematics ;
(A1), (A2) and
(A4);IC7250-D <S2>
(A6);<V1..V4>
<V6,V7,V8>
OK
Yes
No
Check/Replace
(A6);IC7250-B/C
1 13 0
B
(B);<V11..V16>
OK
No
Check/Replace
(B);Conn0245,IC7330,
CRT Socket
Picture OK
Menu OK
NO Sound
(l,r,l+r)
NICAM/2CS/
Multimono
(MSP3415D)
(A5);<I2>,SIF
Ok
?
Yes
(A10);
<A10>..<A13>
OK
?
Yes
(A12);
<A16>..<A18>
OK
?
Yes
1 15 0
Check / Replace
(A13);Conn.0234,
Conn.0215
Speakers
18L9.1E
1 15 0
Check / Replace
No
No
No
(A5); IC7250-A,
TS7266
1 15 0
Check / Replace
(A10); IC7833
Yes
1 15 0
Check / Replace
(A11);TS7904..TS7910
(A12);IC7050..IC7053
No
1 15 0
BTSC
(TDA9851)
(A5);<I4>
OK
?
Yes
(A9);<A2>,<A3>
<A6>,<A7> OK
?
Check / Replace
(A9);IC7821
IC7822
No
NO Picture
NO Sound
Menu OK
1 12 0
Check / Replace
(A5);Antenna,
VT_Supply,D6008,
(A6);X1205..X1208
Sound and Picture
from external source
OK ?
Yes
1 12 0
Check / Replace
Tuner1000
1 11 A
No
Deflection not OK
Pictures are not
symetrical and unstable
C
Check / Replace
IC7250
1 13 0
Check/Replace
(B);CRT
Yes
CL 86532104_035.eps
190299
6 Fault finding trees, diagrams and overviews
C
Horizontal section
Picture unstable
horizontally.
Picture width too
small.
No sync.
E/W not ok
(A4) ; <S2>,
<S5>
OK
?
1 53 0
No
Check / Replace
(A4);IC7250
Vertical section
Vertical picture is
too small or unstable
(A4);<S3>,<S4>
OK
?
Yes
No
19L9.1E
1 53 0
Check / Replace
(A4); IC7250
1 17 8
Yes
(A2);<L1>,
<L2>,<L3>,
<L4>
OK ?
Yes
1 33 A
Check / Replace
(A2);L5457,C2458,
C2457,L5463,
L5465,L5470
L5471
1 53 0
Check / Replace
No
(A2);TS7461,TS7460,
TS7470,
(A3);<F3>,<F4>,
<F5> OK
?
Yes
1 17 8
Check / Replace
(A3);Vertical defl. coil
C0222
No
Check / Replace
(A3); IC7401 ,
R3401..R3403,
R3409
D6401,C2403
CL 86532104_036.eps
190299
6 Fault finding trees, diagrams and overviews
B
20L9.1E
ERR 8
Yes
1 17 8
uP Internal RAM
error
Check / replace
(A7);IC7600
No
ERR 2 ERR 7
Yes
1 11 D
High beamcurrent ,
E/W and Horizontal
Protection.
- When the High
beamcurrent protection
is started, fly-back lines
will be visible for 15 sec.
before the set is really in
protection.
- When E/W or
Horizontal protection is
started, the set will hicc-
up for 4sec. before the
protection is really
activated.
- During E/W or
Horizontal protection
the EHT will not be able
to turn on and so the
VlotAux5V to the Tuner
and Sound IC is not
available. As such
ERROR 4 and ERROR
11 will be reported too.
Message :
ERR 11 4 2 0 0
Check/Replace
(CRT);R3340,
+200V supply
or
E/W,Horizontal Prot.
(A2);Conn.0221
No
Yes
1 17 8
General I2C error.
Check SCL and SDA
line of all units for
shortcircuit to ground or
to each other.
The Error code can
only be read by
putting the TV set into
the SDM mode. The
LED will blink 7 times.
Check / replace
(A5);Tuner1000 pin4,5
(A6);IC7250-C pin7,8
(A7);IC7600 pin49,50
(A7);IC7601 pin5,6
(A9);IC7821 pin1,24
(A10);IC7833 pin9,10
Replace the item, which
causes the error.
ERR 5
or 6
Yes
1 11 A
BIMOS error.
The error is detected,
because there is no
communications on I
of the BIMOS
Message :
ERR 4 6 0 0 0
CheckReplace
(A4,A5); the
+8VBIMOS and the I
lines pin7,8 of IC7250
NoNo
ERR 1,
3, 12
No
ERR 4
and/or
11
Yes
No
ERR 10
Yes
1 17 X
+5 V Protection
ERROR 1 ERROR 3
Check
EEPROM error
(A2); +VLotAux+5V
1 17 8
2
C
X-Ray/Over-voltage
Protection.
(USA version only)
1 11 D
Vertical / Frame
Protection.
ERROR 4
ERROR 11
- When I
signals or the
+5D are missing
on IC7601 the set
can function, but
2
C
will not be able to
- When the X-Ray
protection is started, the
2
C
set will hicc-up until the
voltage at pin 50 of
IC7250 becomes >3.9
Volts. At the voltage of
3.9 V the set is put in
protection mode.
- During x-ray protection
the EHT will not be able
to turn on and so the
VlotAux5V to the Tuner
and Sound IC is not
available. As such
ERROR 4 and ERROR
- Before the proctection
is really actived, a
horizontal line will be
visible for 3 sec.
- During Vertical /
Frame protection the
EHT will not be able to
turn on and so the
VlotAux5V to the Tuner
and Sound IC is not
available. As such
ERROR 4 and ERROR
11 will be reported too.
Message :
ERR 11 4 3 0 0
17 X
1
Fault in audio section
In this situation the set
turns on without sound.
Message :
ERR 4 0 0 0 0
Check/Replace
(A10);+VlotAux+5V,
IC7833 pin9,10.
1 12 0
I2C Tuner error
- It is possible
that during +5V
protection Error 4
will be reported
too
Message :
ERR 11 0 0 0 0
CheckReplace
(A5);Tuner1000
store any data.
Message :
ERR 10 0 0 0 0
Check/Replace
(A7); +5VD
IC7601 pin 5,6
11 will be reported too.
Check / replace
(A3);IC7401,
C2403,D6401
Conn0222
ERROR 9
New micro controller or
EEProm.Default values
ERROR 12
were loaded. Re-align
the set. If the problem
persists, then IC7601
is defective
Black current calibration loop instable (protection)
CL 86532104_037.eps
190299
6 Fault finding trees, diagrams and overviews
POWER SUPPLY
A1
for 140V V
6550
for 130V V
55725575
55725575
5572
5572
6560
BATT
5577
2551
BATT
6570
1573
6590
2.5A
6590 6582
1573
2.5A
6580 6582
6580
1571
T1A
2561
+VBATT MAIN SUPPLY
5551
A1
ON to
3543
discharge
3546
circuit
6542
3571
AUDIO SUPPLY
2571
2571
2577
9509
2577
V
AUX
A1
ON to
3585
AUDIO AMPLIFIER
A12
V
AUX
AUDIO SUPPLY
To 3950
HORIZONTAL DEFLECTIONA2
V
AUX
A7
CONTROL
V
AUX
4654 3632
TUNER + VIDEO IF
A5
V
AUX
STAND-BY
To anode 6449
3639
V
AUX-1
7251
3 2 +8V BIMOS
1
STB
CIRCUIT
5545
POWER
TRAFO
SPMS LOT
5550
15
5576
16
for 2x3 WATT / 5 WATT AUDIO
11
for 2x2 WATT AUDIO
11
for 2x1 WATT AUDIO
1571
10
T1A
for 1x1 WATT AUDIO
1571
10
T1A
5573
14
7603
3633
3657
+8V AUDIO
5202
7254
7256
6601
-/C3V9
6606
-/C4V7
3V3
+5D
21L9.1E
A8
FRONT CONTROL
+5D
SYNCHRONISATION
A4
+8V BIMOS
VIDEO PROCESSING
A6
HORIZONTAL DEFLECTION
A2
5445
3453
MAIN SUPPLY
2450
5451
ON to
A2
3462
3482
3 EHT
52
7 filement
11
6
9
FOCUS
VG2
3485
6485
6487 3442
6490
6486
VIDEO SUPPLY +200V
2485
5480
3488
V
LOT AUX +50V
VT_SUPPLY
2487
3491
V
LOT AUX -11V
3492
3486
3487
2489
2486
V
LOT AUX -11V
ON to
E/W Circuit
and 7481,7482
4
A2
0220
CRT
B
EHT
FOCUS
VG2
0244
2
4
TUNER
A5
VERTICAL DEFLECTION
A3
POWER SUPPLY
A1
ANODE CRT
FOCUS
VG2
3340
2340
3341
3342
VT_SUPPLY
6008
-/C33
V
LOT AUX +50V
V
LOT AUX -11V
V
LOT AUX +11V
+200VA
to CRT
filement
to (9-1000)
TUNER
to 9401
to 4-7401
to 2-7401
to DEGAUSSING
IIC BUS INTERCONNECTION DIAGRAM
VIDEO
CONTROL
A7
7600
SAA5565
µC
TUNER +
A5
3651
50
49
SDA
3652
SCL
3655
3654
56
7601
ST24W0481
EEPROM
VIDEO/IF
3001
3000
54
1000
TUNER
A6
PROC.
3248
3247
78
7250
TD8844
VIDEO
PROC.
BTSC
A9
DECODER
3828
3827
24 1
7821
TDA9851
BTSC
DECODER
NICAM+
A10
2CS DEC.
3842
10 9
MSP3415D
NICAM
DECODER
3841
7833
5821
2843
+8VA
+8V BIMOS
NICAM + 2CS DECODER
A10
+8VA
SMART SOUND
A11
+8VA
TUNER + VIDEO IF
6488
8
13
2
V
LOT AUX +5V
7480
3490
A5
5000
+5V
A10
NICAM + 2CS DECODER
5831
5832
REAR I/O SCART
A15
V
LOT AUX +5V
to 6-1000
(TUNER)
+5VA
+5VB
to 5101
CL 86532104_002.eps
260299
6 Fault finding trees, diagrams and overviews
REAR I/O SCART
A15
CVBS_TERR
A5
A6
A6
A6
OUT L (MONO)
A5,A10
AUDIO OUT R
A10
CVBS_TERR
A5
A6
OUT L (MONO)
A5,A10
AUDIO OUT R
A10
SIDE AV
E
EXT2
VIDEO/Y
TUNER / IF / VIDEO DETECTOR
A5-1
(TDA8844)
A5-2
(TDA8845)
VLOT
AUX+5V
1000
I6 I5
SDA
A7
A7 SCL
A2-SUPPLY
POWER SUPPLY
A1
0231
170-250V SINGLE RANGE
7520
MC44603A
OSC
2.5V
14
4
3577
HOT
GROUND
SCART 1
21
20
EXT1VIDEO
19
18
17
16
15
13
11
9
7
5
3
1
21
19
17
15
13
11
9
7
5
3
1
EXT1
AUDIO R
M
1
33V
3
7
8
3520
2
3528
EXT1FB
14
12
10
8
P4SCART
6
FRONT EXT1
4
FRONT EXT1/
2
AUDIO R
20
EXT2VIDEO/Y
18
16
14
12
10
AV_MUTE EXT2
8
FUN C_SW
6
EXT2 AUDIO
4
L (MONO)
2
EXT2 AUDIO R
11
I1
V
AC
3578
AUX
6505
GBU4J
EXT1R
EXT1G
EXT1B
AUDIO
SCART 2
EXT2C
AUDIO
A6 A15 A15
5000
667
TUNER
49
5
6008
5500
5502
1500
T 4 AL
P3
1
BUFFER
CURRENT
SENSE
A6
A6
A7
A5
A5
A6
A7
A10
A10
EXT1
AUDIO L (MONO)
5002
40,4
RF-AGC
7251
LM 317T
1
7254
STD BY
7252
CIRCUIT
DC
3525
2540
1003
1004
38,9
23
2508
P2
G
7518
STH8NA60FI
3518
6540
5
4
48
49
54
AUDIO FM DEMODULATOR
A5-1'
(TDA8844)
II
7250-A
TDA 8844
1
I3
A7 A15
III
7250-A
TDA 8845
SOUND
IF
AMPL.
AGC
1
SIF
+8V BIMOS
7266
I2
3210
+8V BIMOS
5572
CIRCUIT IS VALID FOR
2X2W EXECUTION
(FOR OTHER EXECUTIONS SEE
CIRCUIT DIAGRAM A1 AND THE
DIVERSITY LIST)
6560
6550
3585
SIF
B
A5-2'
(TDA8845)
IF
A
IF
7250-A'
TDA
8844/45
P7
+8V AUDIO
5201
STAND BY A7
P1
5545
5
4
3
2
D
S
9
8
7581
TCDT1101G
4,5 MHz
1001
5,5 MHz
6,0 MHz
1002
6,5 MHz
DUAL / MONO
AUDIO QSS MIXER
1204
55
AB
5006
4
3
VIDEO
DET
12
10
11
5575
12
13
5573
14
5550
15
5576
16
17
18
1
2
FM
AUDIO
DET
3216
3206
7252
1573
2,5A
1572
T1A
5577
1
2
7570
TL431CLP
(ONLY FOR MONO SETS)
7001
55
2
(ONLY FOR NICAM L SETS)
SIF
5202
1200
5.5MHz
1201
6MHz
1203
4.5MHz
6590
2561
2551
3
VBATT ADJ.
(OPTIONAL)
2
1556
CVBS-TERR
CVBS_INT
6582
2571
3571
3572
SIF
A10
7253
P2PLL/MTRAP
AUDIO
SUPPLY
P5
P4
5551
QSS
MIXER
SOUND
AM DEM.
A10
A15
3211
P6
AUDIO OUT
15
I4
EXT AUDIO
A5
VAUX
+VBATT
MAIN
SUPPLY
MONO
22L9.1E
NICAM + 2CS DECODER SMART SOUND
A10 A11
A15
A5 MONO
A11
A15,E FRONT/EXT 1/AUDIO L
A15,E FRONT/EXT1 AUDIO R
A15 EXT 2/AUDIO L/MONO
A15 EXT 2/ AUDIO R
A
A12
7950 TDA 7057 AQ (2X3W) OR
7951 TDA 7053 A (2X1W) OR
7952 TDA 7052 B (1X1W) OR
7953 TDA 7056/N2 (2X2W)
A
B
VIDEO PROCESSING
A6
A7
EXT1
VIDEO
V1
A4
17
13
A7
A7
A7
SYNC
EHT INFO
A2
H+LYBK
A2
EH T INFO
A2
7258
7250-B
TDA8844/45
P2LLP
P0SYS1
P1SYS2
S1
3420 3424
7250-D
TDA8844/45
SYNC
41
CVBSTXT
A15
7833
MPS 3415D
DEMODULATOR
55
52
53
49
50
A14
NICAM
SWITCHING
9
SCL
A7
SIFA558
AUDIO AMPLIFIER
A15
A15,E
EXT2
VIDEO/Y
EXT2C
10 11
38
VIDEO OUT
42
50
1206
3.58
+8V BIMOS
G
16kHz
E/W
VERT.
DRIVE
Y-DELAY
PAL/NTSC
SECAM
DECODER
37
CVBS
Y/C
SWITCH
35 34
1205
4.43
G
50kHz
3423
2CS
FM
AM
A17
A19
A18
A7
1207
3.575
40
45
47
46
10
SDA
L+
L-
R+
R-
A15
R-Y
B-Y
3422
S2
S4
S3
A10
29
LEFT OUT
A11
RIGHT OUT
28
A12
37
OUT L
36
OUT R
A13
HEADPHONE
A13
A16
L+
R+
R-
BASE
BAND
DELAY
1208 3.579
A2
L1
H-DRIVE
H-DRIVE
A3
VDRIVEVDRIVE+
L-
(ONLY FOR BASIC SET)
MONO
A15
A15
0232
V2
28
Y
30
U
29
V
EXT1R
EXT1G
A15 A7
A5
TREBLE
TREBLE
V3
V4
EXT1B
BASS
A7
BASS
A7
L+
L-
R+
R-
7250-C
TDA 8844/45
27
31
32
23 24 25 26
EXT1FB
7904 : 7906
7908 : 7910
0234
RGB
MATRIX
RGB
INPUT
R G B
R-TXT OSD
-
PROC.
LEFT
MAIN AUDIO L
-
PROC.
RIGHT
MAIN AUDIO R
4
3
2
1
A7A7
SCL
V9 V10
7
R
CONTROL
G
CATHODE
B
CALIBRA-
EHT INFO
B-TXT OSD
G-TXT OSD
FB-TXT OSD
L
R
SDA
8
TION
PROC.
HORIZONTAL DEFLECTION
MAIN
SUPPLY
3462
7460
5461
3473
BU1508DX
L2
7470
STP16NE06
G
3474
D
S
7461
BF819
EW-DRIVE
EWD-DYN
A2
VERTICAL DEFLECTION
VLOT AUX +11V
F2
3406
3408
TDA9302H
F1
7401
6401
2
7
+
OP. AMP
1
-
3407
RGB
22
7263
L3
L4
2403
6
4
VLOT AUX
-11V
18
V8
21
R
20
G
19
B
MAIN
SUPPLY
OUTPUT
CIRCUIT
DRIVE
6402
3
5
A8
A
B
Vaux
V5
V6
V7
EHT INFO
LINE
E/W
F4
F5
3401
FRONT
CONTROL
6690
LTL-307 X
LED
A7
7680
GP1U 280P
IR
RECIEVER
1
A7
IR
LOCAL
KEYBOARD
7603
SAM
STAB
7604
RESET
uPreset
FORMER
B
0245
0243
1
2
3
4
5
6
A2
2340
3453
5451
0221
VFLYBK
A7
VLOT AUX+50V A2
0 222
1
2
A7
KEY BD 1
KEY BD 2
KEY BD 3
3V3
SAM
A7
CRT
V11
V12
V13
+200VA 3340
1
3
HORDEFLCOIL
VERT.
DEFL.
COIL
CONTROL
BUZZER
A12
VOLUME +
A12
EEPROM (PIN 7)
A7
BASS
A11
DUAL/MONO
A5
TREBLE
A11
SCART PIN8
A15
AV-MUTE/EXT2FUNC
A15
STBY ON
A2
+PROTN
STANDBY
A5
LED
A8
RGB BLANKING
A15
M28
M29
CVBS TXT
A6
7330
TDA 6107Q
1
2
3
5
BC-INFO
0244
0220
5445
10
6
5
11
9
8
12
7
7505
+200VA
R
9
G
8
B
7
EHT-INFO
1 2 3 4
A B C
FOCUS VG2
3481
3448
6490
6485
6487
6486
6488
6463
3485
V14
V15
3449
3491
3492
3486
3487
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
V16
3490
1
2
3
4
5
6
7
8
9
3341
3342
7600
SAA 5565
P2
P3
P0
CVBS
3446
3488
3465
uC
RESET
VSYNC
HSYNC
R
G
B
2487
7480
L78MO5
PROT.
CIRC.
7481 7482
7601 ST 24W
4
52
51
50
49
P1
48
47
46
45
44
C4
+3V2
43
C1
42
41
40
39
+3V3
38
37
36
35
VDS
34
R
33
G
32
B
31
30
29
SDA
SCL
28
27
2
G
V FOCUS
V
MAIN SUPPLY
EHT INFO
L5
VLOTAUX-11V A3
L6
2489
2485
L9
1
L8
VLOTAUX+50V
L7
3442
VLOTAUX+11V A3
2486
L10
3
2484
2
STBY ON
+PROTN
VIDEO SUPPLY
5
EEPROM
C2
SDA
C3
SCL
SYS1/AM
P1SYS2
RC5
RESET
X - TAL
12MHz
VD
HD
FB_TXT_OSD
R_TXT
OSD
_
G_TXT_OSD
B_TXT_OSD
LLP\M TRAP
0267
CRT
25kV
EHT
EWD_DYN
HFLYBK
VT_SUPPLY
VLOTAUX+5V
FILE MENT
EHT INFO
86532104_001.eps
7609
7608
1
2
3
M25
M24
SDM
A5,A6,A10
A5,A6,A10
A6
A7
A8
A7
VFLYBK
HFLYBK
A6
A6
A6
A6
A5,A6
FOR
COMPAIR
A
A2 A4
A6
A2
A4
A7
B
A5
C
A2
A7
260299
A3
A2
6 Fault finding trees, diagrams and overviews
23L9.1E
1V / div DC
20µs / div
S2 HDRIVE
0.2V / div DC
20µs / div
S3 VDRIVE+
1V / div DC
5ms / div
S4 VDRIVE-
1V / div DC
5ms / div
I2
0.5V / div AC
20µs / div
1V / div DC
10µs / div
1V / div DC
20µs / div
V3
0.5V / div AC
20µs / div
0.5V / div AC
20µs / div
V5
0.5V / div AC
20µs / div
V6
0.5V / div AC
20µs / div
V7
0.5V / div AC
20µs / div
V8 I5 SCL TUNER
2V / div DC
20µs / div
V9 SCL 7250 I6 SDA TUNER
1V / div DC
10µs / div
V10 SDA 7250V1 CVBS-INT
C2 SDA uPS1 H FLYBK
1V / div DC
20µs / div
C3 SCL uPV4
1V / div DC
10µs / div
V11 R
1V / div DC
10µs / div
V12 G
1V / div DC
10µs / div
V13 B
1V / div DC
10µs / div
V14
50V / div DC
10µs / div
V15
50V / div DC
10µs / div
V16
P1
50V / div DC
5ms / div
P2
2V / div DC
10µs / div
P2
2V / div DC
10µs / div
P3 15V DC
P3 12V DC
P4 138V DC
138V DC
P4
P5 11.8V DC
P5 9.8V DC
P6 16V DC
13.8V DC
P6
P7 8V DC
L1
HDRIVE
0.1V / div DC
20µs / div
2V / div DC
20µs / div
L3
L5 V
LOT AUX-11
2V / div DC
5ms / div
LOT AUX+11
L9 V
2V / div DC
5ms / div
L1
0.3V DC
A10 LEFT OUT A19 L-
0.2V / div AC
0.2ms/div
A11 RIGHT OUT
0.2V / div AC
0.5ms / div
A12 AUDIO OUT L/MONO
L3 138V DC
L6 190 V DC
L7 32.5V DC
28V DC
L7
L8 46V DC
L8
30V DC
0.5V / div AC
0.2ms / div
A13 AUDIO OUT R
L10 5V DC
0.5V / div AC
0.5ms / div
F1 VDRIVE + A14 SCL 7833
0.5V / div DC
5ms / div
F2 VDRIVE-
0.5V / div DC
5ms / div
F3L2
10V / div DC
5ms / div
F4 V FLYBK
1V / div DC
10µs / div
A15 SDA 7833
1V / div DC
20µs / div
A16 R+
0.2V / div AC
0.5ms / div
A17 R-
0.2V / div AC
0.2ms/div
COMPAIR
MAIN PANEL COMPONENT SIDE
1
24
A19
A18
0267
A4
A1
A2
7950
1
2
8
11
10
12
13
1
11
3
TUNER
1
7821
7
12 13
A16
A17
V3
V4
S2
S1
S3
S4
A5
SDM
A3
29
30
40
41
46
47
56
I1
M25
1
7601
4
M24 ( )
A14
A15
A11
A10
28
V2
21
V5
19
V7
V8
18
15
I4
13
V1
8
V10
7250 TBA 8844
7
V9
6
I2
1
I3
CRT PANEL TRACK SIDE
27
26
7600
42
C1
49
C3
50
C2
52
1
8
5
P5
1
64
9
10
7833
28
29
32
33
6402
F4
F2
3406
F5
3442
L8
3403
P6
3402
3508
7461
L10
3401
M29 M28
6582
B
E
OUT IN
L9
3486
SAM
HOT GROUND
BORDER
P4
L1
C
L6
3485
GND
7480
3491
L5
F1
7 1
7401
62
98
7520
16 1
P3
2508
P2
G
D
P1
3509
G
D
L4
S
7470
L2
B
C
L3
E
7460
LOT
7518
S
0.5V / div AC
20µs / div
V2
0.5V / div AC
20µs / div
1V / div DC
20µs / div
C1
1V / div DC
0.5µs / div
50V / div DC
10µs / div
P1
50V / div DC
5ms / div
100V / div DC
20µs / div
L4
5V / div DC
5ms / div
2V / div DC
5ms / div
F5
0.5V / div DC
5ms / div
0.2V / div AC
0.5ms / div
A18 L+
0.2V / div AC
0.2ms / div
= 0V
CL 86532104_020.EPS
190299
V13
V12
V11
0245
6
1
7330
9
1
V14
10
9
11
8
7
V15
6
5
4
0244
14
V16
12
CL 86532104_018A.EPS
260299
Loading...