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I was very glad recieving the service manal from You. Manuals were delivered promptly and were correct as advertised. A complete and very usefull service manual with all details. Thank you!
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Very clear copy. No pages missing. Big bonus is that it includes supplement. Price is affordable compared to what others ask for.
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Found the quality of the copy excellent and a very quick service. I would certainly recommend the service.
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Good quality, clear diagrams. Exactly what I needed.
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Good product. All the information is invcluded, but due to the complexity of the amplifier, it still is difficult to get it to operation again.
FLOW CHART NO.4 When the output voltage fluctuates. Does the secondary side photo coupler circuit operate normally? Yes Does the primary side photo coupler circuit operate normally? Yes Replace IC1001. FLOW CHART NO.5 When buzz is heard from the vicinity of power circuit. Check for short-circuiting of rectifying diode and circuit in each rectifying circuit of secondary side. (D1003, D1030, D1008, D1009, D1013, D1016, Q1002, IC1002, Q1007, Q1010, Q1011, Q1014, Q1004, etc.) FLOW CHART NO.6 The fluorescent display tube does not light. Is the supply voltage of 5V fed to pin(6) and pin(24) of IC2001? Yes Is the supply voltage of -24V fed to pin(15) of IC2001? Yes Is there 500kHz oscillation at pin(26) of IC2001? Yes Check the signal lines of FIP DA, FIP CK, FIP CS of IC2001 and IC601? Yes Are the filament voltage applied between (1), (2) and (38), (39) of the fluorescent display tube? Also negative voltage applied between these pins and GND? No No Check the EV 5V line. No Check the circuit and replace the parts. (IC1001, IC1006, D1048, D1015, etc.) Check the circuit and replace the parts. (IC1001, IC1012, D1024, etc.)
No
No Check the -FL -24V line. No Check R2001, IC2001 and their periphery.
Check or replace IC2001 and IC601.
No
Check the power circuit, D1017, Q2023, Q2024 and Q2025.
Yes No Check the fluorescent display tube and its periphery? FLOW CHART NO.7 The key operation is disabled. Is key switch contact and installation state normal? Yes Is the control voltage normally into the pins(3), (4), (7), (8), (9), (10), (11), (12), (13), (14) of IC2001? No
Check that the fluorescent display tube is free from damages such as crack.
Replace key switch.
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