Hitachi VK-S274R Service Manual page 17

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