Video Part; No Picture Cvbs & Y/C Out - Marantz SA12 Service Manual

VIDEO PART

NO PICTURE
CVBS & Y/C OUT
Diagnostic Software
NO
POWER SUPPLY?
YES
VIDEO NO
CONN. 1300
CONN. 1301
?
YES
NO
VIDEO
CVBS CINCH
?
YES
NO
VIDEO
Y/C OUT
?
YES
VIDEO PART OK
To put set in "Player script", press keys
STOP+OPEN/CLOSE simultaneously and switch mains on.
Proceed until display shows "
Press PLAY to execute.
Check supply voltages +8Vstby, –8Vstby, +12Vstby,
+6Vstby.
Check voltage regulator 7304
Check safety resistors 3615, 3516
Check flex connection to mono board.
Check testpoints 1-6
Check flex connection to mono board
Check mono board
Check testpoint 19.
Check CVBS VIDEO buffer transistors 7301, 7300, 7310.
Check testpoints 20-21.
Check SCART SWITCH IC 7305.
Check I2C (testpoints 22,23).
Check Y/C VIDEO buffer transistor 7302, 7303.
".
COLOUR-B ON
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