Caple C702G Manuel de service télécharger pdf (Page 98)

100

101

7-10

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.

Check the pulse 5Vp-p at IC791 pin 18 on the VIDEO PWB (PWE-567A).

Check the pulse 5Vp-p at IC791 pin 19 on the VIDEO PWB (PWE-567A).

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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Caple C702G Manuel de service Page 98

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