Service manual

53
13VT-R100/R150
13VT-CR10
FLOW CHART NO.2-5SOUND TROUBLESHOOTING PLAYBACK SOUND TROUBLESHOOTING
PLAYBACK PICTURE TROUBLESHOOTING
FLOW CHART NO.2-7
No sound
FLOW CHART NO.2-6
No playback picture
YES YES YES YES
YES
YES
YES YES YES YES
Is there a signal at pin (55) of IC401? Check the TV TROUBLESHOOTING : "NO SOUND".
NO
NO NO
No playback sound
Check IC401 and adjacent parts.
Check the VCR TROUBLESHOOT- ING : "NO SOUND".
FLOW CHART NO.2-8
Does the infrared remote control function?
Is 5V applied at pin (2) of the remote control receiver?
Is fluorescent lighting enough away from the set? Is there short-circuit in the key input or IC2001?
Check IC2001.
Check the 5V and GND lines.
Check key input terminals.
Replace the infrared remote control as required.
Check pin (14) of IC2001 and /or receiver.
Reposition the set not to be exposed to strong light.
Is "L" pulse given out of pin (1) of the receiver and received at pin (14) of IC2001, when the infrared remote control is activated?
No operation is possible from the infrared remote control.
Does waveform appear at pin (54) of IC401? Check IC351 and adjacent parts.
Check AT8V line and C361.
Does approx. 8V appear at pin (5) of IC351? Check IC401 and adjacent as same as "NO PICTURE". Does waveform appear at pin (54) of IC401?
NO
NO
NO
NO
NO
NO
NO
Check the VCR TROUBLESHOOT- ING : "NO PLAYBACK".
Is there a signal at pin (39) of IC401?
INFRARED R/C TROUBLESHOOTING