Sharp XV-ZW99U Service Manual page 31

I
xv-zw99u
TROUBLE SHOOTING TABLE
(Coutinued)
Checking the G signal line of signal processing PWB
- No j
Is
there signal at pin (11) of IC3501
T Check pin (3) line of connector TN
1 Yes
as specified?
Yes
No
of 103502 change?
Yes
No i lC3502, IC2001 or nearby circuit in
trouble
Is there signal input at pin (13) of
I I No
Are there signals inputs at pins (2) thru
t-
lC3504, lC3516, IC4005 or nearby
j
(5) and (10) thru (13) of lC3507?
circuit in trouble
I
I Yes
1
I
Are there signals inputs at pins (9) thru
(12) of IC4016?
Are there Bus signals input at pins
fC2001 or nearby circuit in trouble
No
Are there signals input at pins (a), (9),
__)
lc3507, lC3508, IC2001 or
nearby
(174), (175) (178) thru (180). (187)
circuit in trouble
(188), (193) thru (199) and (205) thru
(208) of IC4008?
1
Yes
Go to "Checking MMC circuit
"
Is there CLKR signal at pin (27) of
IC4013 or nearby circuit in trouble
. . . . .
IC4006, Q4010, Cl401 3 or nearby
circuit
in trouble
31