No Signal Of Tv, Outside Input Screen - Zenith DVR313 Series Service Manual

10. No Signal of TV, outside input screen

No signal of TV image in TV
connection
YES
Check CABLE =>IC4009 signal
input after checking Tuner
power and ambient circuits.
YES
IC4009 -27 :HIGH ?
(/RST 7114 )
YES
Check
IC4009 -31,32
I2C CLK and DATA in the
Reset mode.
YES
IC4009 -94,95 signal check?
(VI_CLK0,VI_VSYNC0 )
YES
Check IC4009 =>IC6902
VI_D0 ~VI_D7 signal.
YES
Check
IC6902 =>IC1009
VI_DD0 ~7,_CLK,_VSINC0
Signal.
YES
Check <No signal of
COMPONENT, COMPOSIT/ S-
VIDEO screen in DISC play>.
No signal of outside input 1
image (Composite input in
rear side)
Check C701 =>CABLE
=>IC4009 signal input.
NO
Check IC2084 -1,13 =>IC2081 -
2,3 signal flow.
NO
Check IC2001 -4,5,6
signal flow.
NO
Check X401 Clock generation.
NO
Check IC4009 power and
ambient circuits.
NO
IC6902 -99 RESET
signal in the reset mode.
YES
Check IC6901, 6902 power
And ambient circuits.
Check
NO
3-9
No signal of outside input 2
image (S-VIEDO / Composite
input in front side)
Check JACK CABLE
=>IC4009 signal input.
Check IC2075 RESET
signal I/O.