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Very good detail, all pages clear, exactly what I needed
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Excellent service, and just what I needed to service my TU-7700. All pages of the manual are clear and easily readable.
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Excellent printing quality.
A complete and very usefull service manual with all details.
GREAT SERVICE AT VERY LOW PRICE!
A+++++++++++++++++++++++++
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We received the manual in a timely manner and it was exactly what we were expecting. Excellent replacement for original Service Manual.
All schematics are very legible. We are really satisfied.
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We received the manual in a timely manner and it was exactly what we were expecting. Excellent replacement for original Service Manual.
All schematics are very legible. We are really satisfied.
TROUBLESHOOTING GUIDE
THE AUDIO CAN NOT RECORD
Is bias level at L104 OK?
NO
Is the voltage at pin 2 of L104 5V?
NO
Check POWER circuit.
YES
YES
Is the voltage at pin 29 of IC3001 about 5V?
NO
Change IC3001.
L104 is broken or shorted.
Is there audio signal at pin 5 of CP102?
NO
Check the circuit between pin 4 of IC101 to pin 5 of CP102.
YES
Is there audio signal at pin 11 of IC101? YES
NO
Change IC101.
Check lead wire of A/C HEAD and CONNECTOR.
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