Main Board (5 Of 15) Schematic Diagram - Panasonic TH-37LRT12U Service Manual

TH-32LRT12U-A * TH-37LRT12U/M/A

12.6. Main Board (5 of 15) Schematic Diagram

MAIN BOARD PCB-657-D (5/15)
!
D
C389 C390
NC/220pF NC/470pF
Tuner_CVBS_IN Tuner_CVBS
L19 L20
0/1.8uH 0/1uH
C391 C392 C393
NC/470pF NC/330pF NC/220pF
GND_A GND_A GND_A
Tuner
AV1
AV2
AV3
AV1
C
AV2
AV3
DTV
DTV
AV1
AV2
B
AV3
5V I2C CONTROLLER
SIGNALS
A
TH-32/37LRT12
Main Board (5 of 15) Schematic Diagram
5
M52790FP
+8V_A +8V_M
FB9
FB/1206/19-ohm
C370 C498 C84
100uF/16V 0.1uF 100uF/16V
GND_AU GND_AV
+8V_M
U12 M52790FP
Tuner_CVBS C86 0.47uF
36 31
TUNER_IN
V1_OUT
AV1_CVBS_IN C87 0.47uF
2
V2_IN
AV2_CVBS_IN C91 0.47uF
7
V3_IN
AV3_CVBS_IN C88 0.47uF
12
V4_IN
AV1_SV-Y_IN C89 0.47uF
6 27
Y2_IN Y1_OUT
AV1_SV-C_IN C90 10nF
4 29
C2_IN C1_OUT
AV2_SV-Y_IN C92 0.47uF
11
Y3_IN
26
V2_OUT
AV2_SV-C_IN C93 10nF
9
C3_IN
AV3_SV-Y_IN C94 0.47uF
16 22
Y4_IN Y2_OUT
AV3_SV-C_IN C95 10nF
14 24
C4_IN C2_OUT
DTV_SV-Y_IN C96 0.47uF
32
Y_IN
DTV_SV-C_IN C97 10nF 34
C_IN
DTV_AUDIO_L C98 2 1 10uF/16V 35 30
L-CHT_IN L-CH1_OUT
DTV_AUDIO_R C100 10uF/16V
2 1 33
R-CHT_IN
AV1_AUDIO_L C101 10uF/16V
2 1 3
L-CH2_IN
28
R-CH1_OUT
AV1_AUDIO_R C103 10uF/16V
2 1 5
R-CH2_IN
AV2_AUDIO_L C104 10uF/16V
2 1 8
L-CH3_IN
25
L-CH2_OUT
AV2_AUDIO_R C105 10uF/16V
2 1 10
R-CH3_IN
AV3_AUDIO_L C106 10uF/16V
2 1 13
L-CH4_IN
AV3_AUDIO_R C458 10uF/16V
2 1 15 23
R-CH4_IN R-CH2_OUT
SCL_5V R128 220
17
SCL
SDA_5V R129 220
18 21
SDA BIAS
Z65 Z66
ZMM55C6V8 ZMM55C6V8 GND_AV GND_AV
GND_AV
4
C85
0.1uF
R122
R124
R126
C459
10uF/16V 1 2 R424 10K MUX_AUDIO_L
C102
10uF/16V R425 10K MUX_AUDIO_R
1 2
R426 R427 Add the voltage divider for audio input signals
6K8 6K8
Modified by Monlong 2K70425
GND_AV GND_AV
C108
+
10uF/16V
3
44
Use one pi filter for AV Mux CVBS Output
Modified by Monlong 2K70425
0 MUX_CVBS
L14
0 R325
NC/75 L14 belongs to 0ohm
C341 C344
C341,C344 belong to N.C
NC/220pF NC/220pF
GND_A GND_A GND_A
These components need to close to SPV7100
Use one pi filter for AV Mux SV-Y Output
0 MUX_SV-Y
Modified by Monlong 2K70425
L18
0 R326
NC/75
C346 C347
L18
NC/220pF NC/220pF
C346,C347
GND_A GND_A GND_A
These components need to close to SPV7100
0 FB43 BEAD MUX_SV-C
C349 C350 R327
NC/220pF NC/220pF NC/75
C0603 C0603
GND_A GND_A
These components need to close to SPV7100
Tuner_CVBS_IN
P(3,15) Tuner_CVBS_IN
AV1_CVBS_IN
P(3) AV1_CVBS_IN
AV2_CVBS_IN
P(3) AV2_CVBS_IN
AV3_CVBS_IN
P(3) AV3_CVBS_IN
AV1_SV-Y_IN
P(3) AV1_SV-Y_IN
AV1_SV-C_IN
P(3) AV1_SV-C_IN
AV2_SV-Y_IN
P(3) AV2_SV-Y_IN
AV2_SV-C_IN
P(3) AV2_SV-C_IN
AV3_SV-Y_IN
P(3) AV3_SV-Y_IN
AV3_SV-C_IN
P(3) AV3_SV-C_IN
DTV_SV-Y_IN
P(3,15) DTV_SV-Y_IN
DTV_SV-C_IN
P(3,15) DTV_SV-C_IN
DTV_AUDIO_L
P(3,15) DTV_AUDIO_L
DTV_AUDIO_R
P(3,15) DTV_AUDIO_R
AV1_AUDIO_L
P(3) AV1_AUDIO_L
AV1_AUDIO_R
P(3) AV1_AUDIO_R
AV2_AUDIO_L
P(3) AV2_AUDIO_L
AV2_AUDIO_R
P(3) AV2_AUDIO_R
AV3_AUDIO_L
P(3) AV3_AUDIO_L
AV3_AUDIO_R
P(3) AV3_AUDIO_R
SCL_5V
P(3,10) SCL_5V
SDA_5V
P(3,10) SDA_5V
TH-32/37LRT12
Main Board (5 of 15) Schematic Diagram
2
1.8UH --> 0ohm
2 20PF --> NC
MUX_CVBS
MUX_CVBS P(7)
MUX_SV-Y
MUX_SV-Y P(7)
MUX_SV-C
MUX_SV-C P(7)
MUX_AUDIO_L
MUX_AUDIO_L P(7)
MUX_AUDIO_R
MUX_AUDIO_R P(7)
1