4 - 3
Troubleshooting > Trouble Diagnosis
1
OK
TL1082, 1083,
1085, 1086 :
Pulses
IC1001 faulty.
OK
NG
IC1001-7 :
CCD output signal
Q1001 faulty.
OK
TL1016, 1017,
1019 : Pulses
IC1002 faulty.
OK
TL1018, 1020,
1024 : Pulses
NG
IC1121 faulty or connect
the connections of circuit
boards..
IC1121 faulty.
OK
NG
TL1236, 1238,
1240 : Pulses
NG
IC1121 faulty or connect
the connections of circuit
boards..
NG
(2) No chroma signal
[For VK-S274R/S274ER]
Refer to "(1) No video
(luminance) signal"
Luminance
signal
OK
NG
OK
NG
TL1530 :
Chroma signal
OK
NG
IC1121-65 :
Chroma signal
Q1153 faulty.
OK
IC1601-7 :
Chroma signal
Q1605 faulty.
IC1601 faulty.
NG
IC1121 faulty.
OK
TL1154 : 3V
Q1151 or D1151 faulty.
NG
The test lands and components of circuit no. 1000-1099 are
on the SP circuit board.
The test lands and components of circuit no. 1100-1499 are
on the PC circuit board.
The test lands and components of circuit no. 1500 and higher
are on the CSR circuit board.