6.
Block Diagrams, Testpoint Overviews, and Waveforms
I
2
C and Supply Voltage Overview
POWER SUPPLY
1512
4
3
2
1
2
7
10
11
3
6
2
5
6
1
1511
90VAC-130VAC
low range
3543
5562
3544
A1
Degaussing
Coil
1515
5520
7580
7520
TEA1506
DRAIN
DRIVER
SENSE
DEMAG
CONTROL
IC
CTRL
Vcc
ENERGIZING
CIRCUIT
(optional)
6501
6503
6500
6502
5502
8
1
2
4
3
1500
T4E
2504
6562
6561
-12V
-12V
5563
5560
6560
Vaudio
3549
A4
A2
Std_Con
HOT GROUND
COLD GROUND
7540, 6540
REFERENCE
CIRCUIT
7541
+3V3A
+3V3A
STANDBY
CIRCUIT
7515
TCET1103
3527
3525
3523
3526
7521
14
11
9
3522
7
D
S
G
6520
3528
7523
7451
EHT
F_15380_001.eps
050405
FRAME
MAINSUPPLY
MAINSUPPLY
DEFLECTION
A2
A1
-12V
7421
BUT11APX
5421
3424
0221
1
4
HOR.
DEFL.
COIL
1402
1
2
VERT.
DEFL.
COIL
5441
1
7
2
FOCUS
VG2
EHT
10
EHT
A4
EHT 0
A4
A4
A3
A6
BEAM-
LIMIT
3447
9
6446
8
5
4
6463
3445
3446
3475
VT SUPPLY
VT SUPPLY
6447
+160VD
+160VD
-12V
-12V
FILAMENT
FILAMENT
FILAMENT
3448
3313
3459
6452
6001
-/C33
6451
6444
6448
3443
3444
FRAME OUT
6422
2423
2406
5401
3402
3403
7423
7422
3425
Vaudio
FILAMENT
3463
3465
3464
7463
7461
7465
7462
-12V
3470
7466
7464
3474
3451
2455
FOCUS
EHT
VG2
1400
2
3
3423
6423
2428
3410
2460
6462
6461
2465
3503
3506
t
3581
6522
2521
RESERVED
H-DRIVE
V-DRIVE-
V-DRIVE+
TUNER IF
A3
+ 5 V
+ 5 V
+ 8V
1300
7
8
VT supply
VT supply
VT Supply-A
CRT
B1
EHT
FOCUS
FILAMENT
170 V0
To VIDEO
OUTPUTS
VG2
AUDIO PROCESSING
A5
5861
41 - 7861
+ 5V
AUDIO AMPLIFIER
A6
1 - 7901
or
1 - 7902
+ 5V
FILAMENT
FILAMENT
+ 3V3A
AUDIO FRONT I/O
A7
+3V3A
Vaudio
1x
1x
3x
2x
VIDEO PROCESSING
B1
A4
Vaudio
FILA-
MENT
4379
3493
7493
3494
3
A1
A2
In
1
3495
5482
4491
+3V3
+5V
+8V
1x
+8VD
+3V3A
6491
7494
6492
3496
3497
7496
7491
3492
3491
VTSupply-A
+8V
2x
1x
1x
Vaudio
VIDEO PROCESSING
A4
TUNER IF
A3
3605
7641
M24C16
EEPROM
(NVM)
3604
3643
3642
6
5
3
2
11
WP
7
ERR
9
7200-B
SET
PROCESSOR
PART OF
VIDEO-
PROCESSOR
TDA93XX
ERR
6
SDA
SCL
SCL
SDA
3602
+3.3V
3644
+3.3V
3601
+3.3V
1000
TUNER
UV1336
3003
3004
4
5
ERR
10
1
2
1003
3
AUDIO BTSC STEREO
DECODER
(economic)
A5
7861
TDA9853H
AUDIO
PROC.
3865
3866
40
38
ERR
4
SCL
SDA
FOR
COMPAIR
ONLY
I2C BUS INTERCONNECTION DIAGRAM
ERROR CODE LIST
Error
Device
Error description
Check item
Diagram
0
Not applicable
No Error
-
-
1
Not applicable
X-Ray Protection (USA)
7421, 2423, 6421, 6422
A2
2
Not applicable
Horizontal Protection
7421, 7422, 7423
A2
3
Not applicable
Vertical Protection
7461, 7462, 7463, 7464, 7465,
7466
A2
4
TDA9853H
Tone control & Audio processor I2C
identification error
7861 (Stereo/Sap) A5
5
TDA93XX
POR 3.3V / 8V Protection
7200, 7541, 7491, 7493, 7496
A4, A1
6
I2C bus
General I2C bus error
7200, 3604, 3605
A4
7
Not applicable
-
-
-
8
Not applicable
E/W Protection (Large Screen)
-
-
9
M24C16
NVM I2C identification error
7641, 3641, 3642, 3643
A4
10
Tuner
Tuner I2C identification error
1000, 3003, 3004
A3
11
Not applicable
Black current loop protection
3313, 7307, 7308, 7309, 7310,
7311, 7312, 7313, 7314, 7315,
7316, 7317, 7318, CRT
B1
12
Not applicable
MAP I2C identification error (USA)
-
-
13
Not applicable
VC I2C identification error (Eu)
-
-
14
Not applicable
DVD I2C identification error
-
-
1x
2x
Содержание L03.2L AA
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