Sharp XV-ZW99U - Checking the MMC circuit; No color or unusual tint with NTSC signal

xv-zw99u
TROUBLE SHOOTING
A
9
TABLE (Coutinued)
:
lC4013 or nearby circuit in trouble
i .2s.
IC4006, Q4011, Q4012 or nearby circuit i
in trouble
Checking the MMC circuit
Are there H sync signal output at pin (54)
of IC4008?
w
i
Check X3004(80MHz),
IC4013(40MHz) and their peripheral
circuits
Yes
I
:
of IC4008?
(156) and (181) of IC4008?
their peripheral circuits
.,
circuits
outout PWB”
No color or unusual tint with NTSC signal
I_
Is there chroma signal input at pin (20) of _
No L; ..
“..
Check pin (50) line of connector
:
IC3016? sc1001
Are there B-Y and R-Y signals output at
pins (45) and (46) of IC3016?
*Check the oscillation of X3006 and their’
peripheral circuits
Check IC3018,3019 and their penpheral j
circuits
38