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Thanks you very much for this "hard to find" service manual.
Will help a lot in repairing this tuner.
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I have this hi-fi system for a long time and I need to repair some things. Founding this manual will be very helpfull :)
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It is pretty good. The schematics were covered all components, the manual also provide the parts list . It's useful for the trouble shooting.
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Very fast service, best quality of the service manual and the schematics
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This service manual of the old video cassette recorder VT-LC50EM is very good readable even the tiniest numbers (i.e. IC-pins). The circuits are very clear. Many details of the schematic are very good described but in GERMAN language. Many schematic details - but complete at all. Common background information of several details are enclosed and physical knowledge of the TFT liquid crystal display for example. The manual lacks PCB drawings. If you understand german I would recommend this manual for you.
GM-X554
Connection Diagram
Fuse (30 A) Special red battery wire [RD-223] (sold separately) After making all other connections at the amplifier, connect the battery wire terminal of the amplifier to the positive (+) terminal of the battery. Fuse (30 A) Ground wire (Black) [RD-223] (sold separately) Connect to metal body or chassis.
Grommet
RCA input Connecting wires with RCA pin plugs (sold separately).
Amplifier with RCA input jacks
External Output If only one input plug is used, do not connect anything to RCA input jack B.
Car stereo with RCA output jacks
Front side
Input Select Switch For two-channel input, slide this switch to the left. For four-channel input, slide this switch to the right.
RCA output jack
RCA input jack B RCA input jack A
Connecting wires with RCA pin plugs (sold separately). Back side Fuse (20 A) � 2
Speaker terminal
System remote control wire (sold separately) Connect the male terminal of this wire to the system remote control terminal of the car stereo (SYSTEM REMOTE CONTROL). The female terminal can be connected to the auto-antenna relay control terminal. If the car stereo does not have a system remote control terminal, connect the male terminal to the power terminal through the ignition switch.
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