Sc-Board Block Diagram - Panasonic TH-37PD25U-P Service Manual

15.57. SC-Board Block Diagram

SC Scan Drive
IC6605
TO D20 SC20 BUFFER
CSL 17 6 14
IC6607
AND GATE
4A
CSH 18 8 12 12
4Y
11
4B
13
1A
CBK 14 4 16 1
1Y
3
1B
2
3A
CMH 20 15 5 9
3Y
8
3B
10
2A
4
2Y
6
2B
5
9 11
CML 19 17 3
CEL 13 2 18
IC6606
BUFFER
CPH 9 11 9
CEL2 8 13 7
CL 2 2 18
CLK 3 4 16
SIU 4 6 14
SID 6 8 12
SCSU 7 17 3
D6584
SOS1 11
SOS2 12
TO P2 SC2
VSUS 1
VSUS 2
TO P23 SC23
+15V 1
+15V 2
TH-37/42PD25U/P
SC-Board Block Diagram
ENERGY RECOVERY
IC6602
FET DRIVER
CSH D6624
Q6621
S
12 8
D L6611,12
L6615,16
1/2 Vo
S CSL
14 1
Q6624
D
D6629
Vsus GEN.
IC6601
S2 CMH
FET DRIVER
Q6611 Q6601 VSUS
Q6612 Q6602
12 8
S3 CML
14 1 Q6613 Q6605
Q6614 Q6606
Vbk GEN.
IC6603
VBK GEN
FET DRIVER
Q6671 Q6673
VSUS
14
Q6672 IC6604
Q6641
12 8
Q6642
Q6603
Q6604
IC6581
Q6581
SCAN DRIVER 2
SOS BLINKING TIMES : LED 7 TIMES D6583
(RED LED)
SCAN
DRIVE
+5V(SC1),+5V(SC3)
Vscn,VAD(-90V)LINE
VOLTAGE DOWN DET
SCAN DRIVER 1
SOS BLINKING TIMES : LED 2 TIMES
COLD CHASSIS GROUND
COLD CHASSIS GROUND FLOATING GROUND
IC6501
IC6505
BUFFER
PHOTO COUPLER
CL FCLD
3 5 1 2 5 6
FCLU
3 4
IC6506
FCLKD
13 12 9 8
PHOTO COUPLER
FCLKU
CLK
11 10
3 5
IC6507 IC6502
PHOTO COUPLER BUFFER
SIU FSIU
3 5 1 2
IC6508
PHOTO COUPLER
SID FSID
3 5 3 4
IC6509
PROU
PHOTO COUPLER
5 6 9 8
CEL2 PROD
3 5 11 10
VSCN perfect
IC6511
VSCN
FET DRIVER SC
Q6511
Q6501 2 7
SC
4
Q6512
Q6476
VAD+15V
Q6477
VSET perfect
(VSET rise)
IC6510 IC6521
CPH VSET
Q6520
PHOTO COUPLER FET DRIVER
Q6521
CPH
1 5 Q6502 2 7
VSET INSERT
Q6522
4 Q6530
Q6527
CPH
VSET perfect
(VSET decay)
IC6503 IC6541
CEL
FET DRIVER Q6542
PHOTO COUPLER
Q6541
CEL
Q6547
Q6503
1 5 2 7
VSET2 INSERT
4 Q6551
Q6552
CEL
VSCN gen.
IC6504 IC6542
PHOTO COUPLER FET DRIVER
VAD INSERT
SCSU
1 5 Q6504 2 4 Q6553 Q6555
SCSU
IC6458
D6459
PHOTO +5V(SC1)
COUPLER
IC6469
D6470
PHOTO
+5V(SC3)
COUPLER
IC6467
D6468
PHOTO Vscn(VAD+118V=28V)
COUPLER
IC6458
D6479
PHOTO VAD(-90V)
COUPLER
FLOATING GROUND
129
FSID
FCLD
FCLKD
PROD
VF5V
Vf
Vf
VSCN
TPSC1
Vfo
(Vfo)
VSET REG.
Q6491 Q6492
VSUS
IC6491
FSIU
VSCN GEN VSET
Q6462 FCLU
Q6461
Q6463 IC6517
FCLKU
T6461 IC6456
IC6453 IC6455
PROU
VSCN GEN VSET
15V 5V
Q6451
T6451
Q6452 IC6434 VF5V
3 1 3 1
Q6454 IC6451
Q6455 IC6452
Vf
Q6554
VAD GEN
Q6471 T6471
Q6472 IC6471
Q6474
IC6472
VAD
Q6475 IC6474
Vf
VSCN
TPSC1 WAVEFORM
VSET
Vfo
VSUS
VAD
VSCN
VSET2
TH-37/42PD25U/P
SC-Board Block Diagram
TH-37PD25U-P / TH-42PD25U-P
SC44 TO SD44
A1 B1 FSID
A2 B2 FCLD
A3 B3 FCLKD
A4 B4 PROD
A5 B5
VF5V
A6 B6
A7 B7
Vf
A20 B20
SC46 TO SD46
2 FSI
FCL
4
6 FCLK
8 PRO
VF5V
9
10 VF5V
SC43 TO SD43
A1 B1
Vf
A10 B10
A11 B11 VSCN
A12 B12 VSCN
A13 B13
Vfo
A20 B20
TO SU45
SC45
FSI
2
FCL
4
6 FCLK
PRO
8
VF5V
9
10 VF5V
SC41 TO SU41
A20 B20 FSIU
A19 B19 FCLU
A18 B18 FCLKU
A17 B17 PROU
A16 B16
VF5V
A15 B15
A14 B14
Vf
A1 B1
SC42 TO SU42
A20 B20
Vf
A11 B11
A10 B10 VSCN
A9 B9 VSCN
A8 B8
Vfo
A1 B1