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This service manual was determinant to enable to fix my Alpine Amplifier. I am pleased with my purchase. For a 5 star rating I would like to see a higher resolution scan of the printed circuit board lay-out because the gray scale grafics was dificult to see. Also some schematic diagrams were scanned at a slight angle. Never the less, it had all information I needed to troubleshoot and service my equipment.
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Complete manual, the good quality of reproduction allows enlarged print-out of the schematic diagram in the size it probably had in the original print edition and which is necessary for practical use.
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The service manual was complete and the components on the drawings very good visible.
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downloaded next day , manual is very helpful , fast and easy
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This Service Manual was exactly what I needed to repair my Philips TV. The purchase was convenient and I received the manual at the same day I paid for it.
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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