TROUBLESHOOTINGTROUBLESHOOTING
4. AUDIO (Hi-Fi MODEL)
2) VCR PartA. No sound in E-E mode
a. RF E-E
Record video signal poor.
No sound in RF E-E mode
Check EE MODE.
NO
YESIs 5V obtained at IC051 pin#1?Check Power circuit.
Is luminance and color signalNOIs signal input into IC301
YES
output from IC301 pin#78?pin# 48,50,52,54,56?
YESIs there SIF signal at IC051 pin#2NO
Check RF101.
in RF mode?
NO
Is +5V supplied at IC301 pin#91?Check POWER circuit.
YES
YES
Is there SIF signal out at IC051NO
NOCheck IC051.
Is IC301 pin#80 REC(H) HIGH?Check IC501 pin#45. pin#30, 31?
YESYES
Is VIDEO SW Pulse input at IC301NO
Check IC501 pin#18.
pin#70?Is 12V obtained at IC251 pin#34?
YESNO
Check POWER circuit.
YES
Is REC signal output from IC301
NO
pin#94,95,89,90?Replace IC301.
LP MODE: 89,90 Pin
Is 5V obtained at IC251 pin#40?
SP MODE: 94,95Pin
YES
Check video HEAD and Connector.
Is Audio signal output at IC251NOAre CLK and DATA obtained atYES
pin#16,17?IC251 pin#42,43?Replace IC251.
YES
Is Audio signal output at IC602 pinNO
Check IC602.
#3, 13?
YES
Check Output JACK.
1617 |