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There are currently no product reviews.
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very helpfull
circuit diagram and sparepart list available
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Very good reproduction (copy) of original manual. Didn't have a parts list, but schematic was completely labeled with parts. Complete instructions on how to adjust mechanical functions of the 8-track deck. Well worth having and at a very reasonable cost.
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It's a full manual. All the parts are in there. I haven't found the problem yett, but I am working on it; hope I can rebuild the part myself. To make it more secure and unbreakable this time. Because the part has failed several times before and costs a lot to let it be repaired.
Thanks so much for this rich illustrated and parted manual.
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I downloaded the document. The manual was complete, well scanned and everything was legible. I could zoom in see what I needed to know. There's not much more that you can ask.
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It was complete service manual with all needed service informations. Thanks.
NO.24 Hi-Fi TROUBLESHOOTING(2) FLOW CHART NO.26 LINEAR SOUND MODE TROUBLESHOOTING (1) No linear sound recording (Hi-Fi E-E mode is possible) No Hi-Fi sound recording(E-E mode is possible)
NO Check the AUDIO MUTE (H) line between pin
Is there "L" level at pin (99) of IC201? (99) IC651 and pin (21) of IC701.
NO Replace IC651. YES
Check peripheral circuit of IC651 as YES shown in table. Replace IC201. Is there a signal at pin(4) of IC201?
L-ch pins(16),(17),(18),(19) Is the supply voltage 12V fed to pin(2) of
YES YES
R-ch pins(35),(34),(33),(32) NO
YES Check Hi-Fi 5V line. T601? NO
Check PC 12V line.
Check the Bias oscillation circuit(T601,Q602,
Q603) and FE BIAS CTL line. of IC651?
NO Is there signal (Bias + Audio sig.) at pin (6) YES ofT601?
Is there REC FM signal outputted to the Is there signal (Bias) at pin (5) ofT601? pins(21) (24)(ch-1)/pins(21) to (22)(ch-2) of IC651 ? YES
NO Is the supply voltage of 5V fed to pin(25)
YES Check peripheral circuits of T601.
Is there �H� level at pin(29) of IC651? Check AH-MZ harness.
YES NO YES
Check the MH-AM harness and A/C head.
Check or replace the cylinder. Check the Hi-Fi CTL (H) line between pin (29) IC651and pin(54) of IC701.
FLOW CHART NO.25 LINEAR SOUND MODE TROUBLESHOOTING (2) YES
Check the record AGC setting resistor No linear sound playback (Hi-Fi E-E mode is possible) R670 at pin(37) of IC651.
NO Are MH-AA harness and the PB AMP. Replace IC651. Is there a signal at pin(100) of IC201? YES YES YES NO No Hi-Fi sound playback(E-E mode is possible)
47
Replace IC651. YES
YES Replace A/C head.
peripheral parts normal?
FLOW CHART NO.25 Hi-Fi SOUND MODE TROUBLESHOOTING(3) Clean A/C Head.
Is the azimuth hight of A/C head properly
adjusted?
Readjust azimuth hight.
NO
Is the supply voltage of 5V fed to pin(25) Is there playback envelope signal(about NO 300mVp-p) outputted to the pins(29),(30)
of IC651?
of IC651? NO IC651?
YES A-H.SW.P. signal pin(27) Is there "L" level at pin (99) of IC201? (99) IC201 and pin (21) of IC701.
Check the AUDIO MUTE (H) line between pin
Check peripheral circuit of IC6301 as YES Check the A-H.SW.P. line between pin
NO shown in table.
L-ch pins(16),(17),(18),(19)
Is there a signal at pin(11) of IC201? Replace IC201.
YES R-ch pins(35),(34),(33),(32) (27) IC651 and pin(26) of IC701. NO
YES Is there audio signal inputted at pin(62) Check line between pin (11) of IC201 and
VC-H680NZ
Replace IC651. IC651? pin (62) of IC651.
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