Caple C702G Instrukcja Obsługi Strona 98

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4. ON SCREEN MANAGER (OSM) FAILURE
Check the pulses 5Vp-p at IC791 pins 13(R), 15(G), 17(B) and
12(blanking) on the VIDEO PWB (PWE-567A). when EXIT, CONTROL
or PROCEED SW is pressed.
OK
NG
Check the pulse 5Vp-p at IC791 pin 18 on the VIDEO PWB (PWE-567A).
NG
OK
Check the pulse 5Vp-p at IC791 pin 19 on the VIDEO PWB (PWE-567A).
NG
OK
Check the OSM signals output
IC711 failure
Check the H sync input
Q791 or its ambient circuit failure
CN-AF failure
Q5E1 or its ambient circuit failure
(
on the DEF PWB
(
PWE-624
))
Check the V sync input
IC7A1, Q793, Q794, Q795, Q7A2 or their ambient circuit failure.
IC791 and its ambient circuit failure
Digital control circuit failure (see item 12)
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