Hitachi VK-S274 Service Manual page 24

3
When power turned on: NG
TL1345:PULSE
OK
OK
TL1347-TL1350:PULSES
NG
NG
IC1302-2,10,29:5V
OK
NG
IC1302-12,20:9V
OK
IC1302-28 (TL1312): NG
PULSE
OK
NG
IC1302-3:PULSE
OK
NG
IC1302-30:PULSE
OK
IC1302 faulty.
4
Lens block faulty.
Check the 5V line
Check the +B line.
IC1201 faulty.
IC1201 faulty.
IC1201 faulty.
4
C h e c k t h e c o n n e c t i o n s N G
o f t h e l e n s f l a t c a b l e .
O K
N G
T L 1 3 4 6 : 3 V
O K
N G
T L 1 3 4 4 : P U L S E
O K
L e n s b l o c k f a u l t y .
C o r r e c t t h e c o n n e c t i o n s
o f t h e f l a t c a b l e .
C h e c k t h e 3 V l i n e
I C 1 2 0 1 f a u l t y .
R 1 2 1 4 f a u l t y .
Q 1 2 0 1 f a u l t y .