Hitachi VK-U174 Service Manual page 25

Troubleshooting > Trouble Diagnosis
(5) No focus lens operation
Does zoom
No
operate
normally?
Yes
W h e n p o w e r t u r n e d
No
o n : T L 4 0 0 5 o r
I C 2 5 0 7 - 3 9 : P u l s e
Yes
T L 4 0 0 1 t o 4 0 0 4 o r
Yes
I C 4 0 0 1 - 1 2 , 1 4 , 1 0 ,
1 6 : P u l s e s
No
No
IC4001-8 : 3V
Yes
No
TL4023 : 6V
Yes
No
IC4001-33 : Pulse
Yes
No
IC4001-32 : Pulse
Yes
No
IC4001-38 : Pulse
Yes
No
T L 4 0 2 4 : P u l s e
Yes
I C 4 0 0 1 f a u l t y .
See "(4)No zoom and
focus operation."
Lens unit faulty.
Check the 3V line
Check the 6V (VM)
line
IC2507 faulty.
IC2507 faulty.
IC2507 faulty.
I C 2 5 0 2 f a u l t y .
Circuit No. Circuit Board
1000 to 1099 SP
1100 to 2999 PC
3000 and higher CSR
C h e c k t h e
No
c o n n e c t i o n s o f t h e
l e n s f l a t c a b l e .
Yes
No
C h e c k t h e 3 V l i n e
T L 4 0 0 6 : 3 V
Yes
T L 4 0 0 7 o r
No
I C 2 5 0 7 - 3 3 :
P u l s e
Yes
L e n s f a u l t y .
4 - 6
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 .
I C 2 5 0 7 f a u l t y .
R 4 0 0 1 f a u l t y .
Q 4 0 0 1 f a u l t y .