1-10-12 E8E6DTR
FLOW CHART NO.13
Hi-Fi audio can not be playbacked normally. (Hi-Fi E-E mode is normal.)
FLOW CHART NO.14
Audio can not be recorded normally in the linear audio mode. (E-E mode is normal.)
Is the audio signal inputted into Pin(76,78,80) of IC301?
Does the Bias oscillation circuit operate normally?
Is the audio signal outputted to Pin(10) of IC301?
Is the Playback Envelope signal outputted to
Pin(30) of IC451?
Replace IC301.
Is the Hi-Fi-H-SW signal inputted into to Pin(27) of IC451?
Ye s
Ye s
Ye s
Is the audio signal outputted to Pin(9) of IC301?
Ye s
Ye s
Replace ACE head.
Ye s
No
No
No
No
Check the Hi-Fi-H-SW line between
Pin(27) of IC451 and Pin(25) of
IC501, and service it if defective.
Check the line between Pin(61) of IC451 and
Pin(76,78,80) of IC301, and service it if defective.
Check the Bias oscillation circuit (
Q421,Q422,
Q425,Q426)
and service it if defective.
Replace
IC451.
Replace Cylinder Assembly.
No
Replace IC301.
No
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 CN253 and
Pin(21) of IC451 normal?
Replace the Cylinder Assembly.
Ye s
Ye s
No
Replace IC451.
No
Service the line between Pin(8) of CN253 and
Pin(21) of IC451.
FLOW CHART NO.15
Audio can not be playbacked normally in the linear audio mode. (E-E mode is normal.)
Is there no dirt on the surface of ACE head assembly?
Is the audio signal supplied to Pin(6) of IC301?
Replace
IC301.
Is the audio signal outputted to Pin(10) of IC301?
Check the line between Pin(62) of
IC301 and Pin(4) of IC451, and
service it if defective.
Readjust the height of the ACE head assembly.
Clean the surface of ACE head assembly.
Ye s
Is the height of ACE head assembly appropriate?
Ye s
Replace the ACE head assembly.
Ye s
NoYe s
No
No
No
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