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FLOW CHART NO.12
Hi-Fi audio can not be recorded normally. (E-E mode is normal.)
Is the REC FM signal outputted to Pin(26) of IC451?
Is the line between Pin(8) of CN251 and
Pin(26) of IC451 normal?
Replace the Cylinder Assembly.
FLOW CHART NO.13
Hi-Fi audio can not be playbacked normally. (Hi-Fi E-E mode is normal.)
Is the Playback Envelope signal outputted to
Pin(33) of IC451?
Replace IC451.
FLOW CHART NO.14
Hi-Fi audio can not be recorded normally in the linear audio mode. (E-E mode is normal.)
Is the audio signal inputted into Pin(13,15,17) of IC301?
Does the Bias oscillation circuit operate normally?
Is the audio signal outputted to Pin(11) of IC301?
Is the audio signal outputted to Pin(100) of IC301?
Is CN504 and the connected cable normal?
Replace ACE head.
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Replace IC451.
No
Check the line between Pin(8) of CN251 and
Pin(26) of IC451, and service it if defective.
No
Is the Hi-Fi-H-SW signal inputted into to Pin(39) of IC451?
Yes
Replace
Check the Hi-Fi-H-SW line between
IC451.
Pin(39) of IC451 and Pin(19) of
IC501, and service it if defective.
No
Check the line between Pin(78) of IC451 and
Pin(13,15,17) of IC301, and service it if defective.
No
Check the Bias oscillation circuit ( Q401,Q403,
Q404,Q405,Q406) and service it if defective.
No
Replace IC301.
No
Replace IC301.
No
Replace CN504 and the connected cable.
3-17
No
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