1-11-16 E3B90TR
FLOW CHART NO.13
Hi-Fi audio can not be playbacked normally. (Hi-Fi E-E mode is normal.)
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) of IC301?
Does the Bias oscillation circuit operate normally?
Is the audio signal outputted to Pin(11) of IC301?
Is the Playback Envelope signal outputted to
Pin(33) of IC451?
Replace IC301.
Is CN504 and the connected cable normal?
Is the Hi-Fi-H-SW signal inputted into to Pin(39) of IC451?
Ye s
Ye s
Ye s
Is the audio signal outputted to Pin(100) of IC301?
Ye s
Ye s
Replace ACE head assembly.
Ye s
Ye s
No
No
No
No
Check the Hi-Fi-H-SW line between
Pin(39) of IC451 and Pin(19) of
IC501, and service it if defective.
Check the line between Pin(78) of IC451 and
Pin(13) of IC301, and service it if defective.
Check the Bias oscillation circuit (
Q401,Q403,
Q404,Q405,Q406)
and service it if defective.
Replace
IC451.
Replace IC451.
No
Replace IC301.
No
Replace CN504 and the connected cable.
No
FLOW CHART NO.12
Hi-Fi audio can not be recorded normally. (E-E mode is normal.)
Is the Hi-Fi-COM 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.
Ye s
Ye s
No
Replace IC451.
No
Check the line between Pin(8) of CN251 and
Pin(26) of IC451, and service it if defective.
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