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Tuner 1
IC2201 MTS
A-Board
Audio signal path block diagram
Figure 65. Audio signal path block diagram
A1 A2 A3 A4 AYUV1 AYUV2
IC3001 AUDIO INPUT SELECTOR
IC1002 MPU
Audio MUTE
IC2302 L/R AMP
VAO MUTE
AUDIO OUT CONNECTORS
- 49 Service Manual
L + -
IC2451 AUDIO CONTROL
IC2304 VAO
R + -
A PROG OUT
MUTE Qs
Service Manual
Video-chroma signal path block diagram
Tuner 1 Tuner 2
Figure 66. Video-chroma signal path block diagram.
BLUE PRT LBBOARD
B
LGBOARD
R,G,B
R
LRBOARD
GREEN PRT
SV1 SV2 SV3 V1 V2 V3 V4 VIDEO PROG OUT
VM
VM
VM
IC3001 VIDEO INPUT SELECTOR IC1002 MPU
RED PRT IC7107 IC4019
OSD CONVERGENCE
OSD RGB MAIN&SUB CC
IC7110 OSD SWITCH
R,G,B OSD
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IC4015
AYUV1 AYUV2
IC3002 VIDEO INPUT SELECTOR
MAIN (Y,Pb,Pr)
IC4011 SIGNAL PROCESSOR IC4006 A/D 10BIT
Y,UV
R,G,B VM
Y,UV
IC4025 SGRAM 16M
SUB (Y,Pb,Pr)
IC4018
Y,UV
IC4007 FIFO MEM 5
A-Board
IIC connection
A-Board
IC1002 MPU
IIC2 IIC1
A10 1 2 3 4 5 6 7 8
RM IN FA SDA1 SDA2 7V GND SCL1 SCL2
IC4011 SIGNAL PROCESSING MASTER
IC4018 SIGNAL PROCESSING SLAVE
IC1004 EEPROM
TUNER1 MAIN
TUNER2 SUB
IC3001 A/V SELECTOR
IC3002 V SELECTOR
IC2451 AUDIO PROCESSING
IC2201 MTS
IC7107 CONVERGENCE PROCESSOR
D-Board
IC601 VERTICAL DRIVE
IC602 VERTICAL DEFLECTION CORRECTION
Figure 67. IIC connection - 51 Service Manual
Description of connectors
D4--A4
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 HHS DET GND (CONV) +18v GND (CONV) +18v GND (CONV) GND (CONV) GND (REG) -18v GND (REG) -18V GND (REG) GND (REG) DAF GND (REG) DFCUT 1 2 3 4 5 6 7 8 9
G1--A6
Y/V NC GND C S L GND R GND 1 2 3 4 5 6
K3--A8
GND KEY SCAN 1 KEY SCAN 2 TP GND LED
LR1--LG3
1 2 3 4 5 6 7 8 9 10 11 12 13 14 210V NC HEATER 6.3V OFF MUTE GND (SYGNAL) R 12V GND (PACHI) S-ABL 18V GND (VM) VM NC 140V
D2--A2
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 GND 20V GND 20V GND 20V GND 20V GND GND GND GND ABL GND SOS GND
D3--A3
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 BLK 9V SDA GND SCL GND GND GND VP3 GND V-PULS GND GND GND H-PULS SET +5v
LB1--LG4
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 210V NC HEATER 6.3 V OFF MUTE GND (SYGNAL) B 12V GND (PACHI) S-ABL 18V GND (VM) VM NC 140V NC
D1--A1
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 +20V GND (SOUND) +20V GND (SOUND) -20V GND (SOUND) -20V C-BTL 40V AC ON/OFF P_BTL 40V STAND BY GND STBY 7V NC NC TUNER GND TUNER GND
D6--HVD
1 2 3 4 5 6 7 STBY 7V TO EHT SEPA. EHT REG GND TO EHTSEPA. EHT CAPA GND NC TO EHT SEPA EHT F/B (R) NC STBY 7V
LG1--A15
1 2 3 4 5 6 7 8 9 10 11 12 GND B GND R GND G GND GND VM GND (VM) S-ABL +12V
R1--A51
1 2 3 STB 3.3V RM IN GND
Service Manual
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Description of connectors (continued)
LG2--D5
1 2 3 4 5 6 7 8 9 10 210V NC GND GND +18V +12V HEATER GND NC 40V (+B OF VM)
A9--EEPROM
1 2 3 4 5 6 7 NC WP GND SCL SDA NC NC
A10--BUSSCON
1 2 3 4 5 6 7 8 STBY -7V FA GND SCL1 SDA1 SCL2 SDA2 RM IN
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Service Manual