Sc-Board (2 Of 2) Block Diagram - Panasonic TH-42PZ77U Service Manual

TH-42PZ77U

15.56. SC-Board (2 of 2) Block Diagram

SCAN DRIVE
SC
5V_F1
1
VF-GND2
2
3
VF-GND1
4
5V_F2
5
6
VAD
7
8
+16V
9
+15V-F1
10
11
12
13
14
P+5V
15
TH-42PZ77U
SC-Board (2 of 2) Block Diagram
IC6471
PC6480
ERROR
DET
D6475
+5V_SOS +5V(F1) SOS DET
PHOTO
COUPLER
PC6706
+15V_F2
D6476
+5V(SC3) SOS DET IC6797
PHOTO
COUPLER
PC6710
COMPARATOR
D6834
SOS7_SC2 Vscn(F2) SOS DET
PHOTO
COUPLER
IC6871
PC6871
D6872 COMPARATOR
VAD SOS DET
PHOTO
COUPLER
SOS7_SC2
PC6862
P+5V
Q6700
PHOTO
SCNSOS_CUT1
COUPLER BUFFER
D6690
PC6711
P+5V Q6793
PHOTO
SCNSOS_CUT2
COUPLER BUFFER
D6801
COLD FLOATING GND
IC6873
IC6772
+15V
VCC FET
HO IN
DRIVER
FET
IN
DRIVER GND
<Vsus-Vscn+Vset>
GND LO
D6879 VAD SUPERIMPOSED
Q6662
<Vsus+Vad>
BUFFER
VAD CONT
IC6671
Q6679,
+16V
VCC Q6680
SCSU FET
BUFFER
IN LO
DRIVER
VAD
GND
Q6805,Q6806
SCAN_PHASE 1
D6839
Q6698,Q6699
SCAN_PHASE 2
D6844
+5V_F1
+5V_F2
ERROR
DET
IC6792
R6892 R6888 R6887 R6759
D6833
D6871
Vad: 120V OR MORE, 158V OR LESS VAD
Q6791
D6792
21V OR MORE
BUFFER
Q6690
D6697
D6691
R6696
Q6792
TPSC1
D6846
SC
30
120
SC
SU45
45
FSIU2
1 FSIU2
FOC1U2
2 FOC1U2
FCLKU2
4 FCLKU2
FOC2U2
6 FOC2U2
7 5V_F2
5V_F1
9 5V_F1
FOC2U1
10 FOC2U1
FCLKU1
12 FCLKU1
FOC1U1
14 FOC1U1
FSIU1
FSIU1
15
VF-GND2 SC42 SU42
A1 B1 Vf B41
A30 B30 Vf B70
A31 B31 +5V_F2 B71
5V_F2
A32 B32 +5V_F2 B72
A33 B33 Vf B73
A34 B34 Vf B74
A35 B35 Vscn-F2 B75
A36 B36 Vscn-F2 B76
A37 B37 Vfo B77
A40 B40 Vfo B80
SC41 SU41
Vfo
A1 B1 A41
A4 B4 Vfo A44
Q6781, Q6641-Q6646
Q6782
A5 B5 Vscn-F1 A45
FET
HO BUFFER
OUT
Vscn-F1
A6 B6 A46
A7 B7 Vf A47
LO Vf
A8 B8 A48
A9 B9 +5V_F1 A49
A10 B10 +5V_F1 A50
Q6661
VR6602
A11 B11 Vf A51
2
FET
3 1
OUT
INIT-F
A40 B40 Vf A80
D6665
BUFFER SC
Q6665
SD46
46
FSID1
Q6671,Q6672
1 FSID1
FOC1D1
FET FOC1D1
2
OUT
FCLKD1
4 FCLKD1
FOC2D1
6 FOC2D1
7 +5V_F1
9
+5V_F2
FOC2D2
10 FOC2D2
FCLKD2
D6836
12 FCLKD2
VF_GND1
FOC1D2
14 FOC1D2
D6838
FSID2
15 FSID2
D6705
D6706
SC44 SD44
VSCN-F1
A1 B1 Vf D41
VSCN-F2
VF_GND2 A30 B30 Vf D70
Vfo(F2) A31 B31 +5V_F1 D71 D31
Vfo(F1) A32 B32 +5V_F1 D72 D32
Vf
TPVSCN A33 B33 D73
(+145V)
A34 B34 Vf D74
A35 B35 Vscn_F1 D75
Q6841,Q6842
A36 B36 Vscn_F1 D76
VSCN Gen.
A37 B37 Vfo D77
C6841 VR6841
A40 B40 Vfo D80
D6859
SC43 SD43
A1 B1 Vfo C41
D6860
A4 B4 Vfo C44
Vscn-F1
A5 B5 Vscn_F2 C45
A6 B6 Vscn_F2 C46
D6873
A7 B7 Vf C47
Vscn-F2
A8 B8 Vf C48
+5V_F2
A9 B9 C49
A10 B10 +5V_F2 C50
A11 B11 Vf C51
P+15V CPH
A40 B40 Vf C80
1 3 4 5 8 10
TH-42PZ77U
SC-Board (2 of 2) Block Diagram
B1
B30
B31
B32
B33
B34
B35
B36
B37
B40
A1
A4
A5
A6
A7
A8
A9
A10
A11
A40
D1
D30
D33
D34
D35
D36
D37
D40
C1
C4
C5
C6
C7
C8
C9
C10
C11
C40