No Picture - Sanyo PLC-EF10E Service Manual

Troubleshooting

NO PICTURE

AV JACK BOARD
1. Check that the Vcc-voltages(+9V) are correct.
(IC3001, IC3021, etc)
2. Check that the AV1/AV2 SELECT signals are cor-
rect.
3. Check the input and output signals at IC3001.
Check the input and output signals at IC3021.
INTERFACE BOARD
1. Check that the Vcc-voltages(S5V/S-5V) are correct.
(IC2131,etc)
2. Check the input and output signal at IC2131.
3. Check that the CG1/CG2 SELECT signal is correct.
Pin16 of IC2131 .......................... CG1 : H / CG2 : L
PICTURE
SIGNAL
LINES
VIDEO/Y/y
AV 1 INPUT
C/B-y
R-y
VIDEO/Y/y
AV 2 INPUT
C/B-y
R-y
Y
TP161
4 3
5
TP181
SWITCH
11
TP1100
IC3001
13
14
C/B-y
9 10
3
4
SWITCH
5
IC3021
TP171
9 10
R-y
AV JACK
BOARD
LCD
PANEL
DRIVER
IC401
SCAN CONVERTER
62
AV YUV TO
SIGNAL RGB
PROCES- CON-
63
SOR VERTER
IC101 IC102
9 67 65 63
10 11
1
14
3
SWITCH
15
IC105
13 4
5 2 12
IC1104
1
1
1
IC1113
MAIN BOARD
MAIN BOARD
1. Check the Vcc-voltages at all IC.
2. Check that the AV/CG SELECT signal is correct.
Pin9,10,11 of IC105
3. Check the signals at TP161, 181, 171.
4. Check the input and output signals at IC105.
5. Check the signals at TP201, 202, 203.
6. Check the signals at TP4201, 4221, 4241, 5201,
5221, 5241.
7. Check the signals at TP501, 1501, 531, 1531, 561,
1561.
8. Check the signals at TP2501, 2511, 2502, 2512,
2503, 2513.
TP501
S & H
IC1352
IC501
46
TP1501
S & H
D/A 43
IC1501
IC1351
IC1353
40
TP531
S & H
IC1354
IC531
TP1531
S & H
IC1362
IC1531
43
D/A 46 TP561
S & H
IC1361
IC561
40 IC1363
TP1561
S & H
IC1364
IC1561
IC301
PROGRESSIVE
SCAN
CONVERTER
IC1101
R
3
IC1112 G
3
3 B
-44-
TP2501
TP2511
TP2502
TP2512
TP2503
TP2513
A/D
IC201
TP5201
IC5201
TP4201
IC202
IC4201
TP5221
IC5221
TP4221
IC203
IC4221
TP5241
IC5241
TP4241
IC4241
LATCH
16BIT TO
IC4302
8BIT
CON-
VERTER
LATCH
IC4301
IC4303
DIGITAL
I/F
IC5301
16
SWITCH
IC2131
INTERFACE BOARD
RED
PANEL
GREEN
PANEL
BLUE
PANEL
TP201
T P 202
TP203
D
I
G
I
T
A
CG 1
L
INPUT
R
G
B
R
CG 2
G
INPUT
B