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There are currently no product reviews.
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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.
TH-A30
Removing the DSP board
(See Fig.9)
Prior to performing the following procedure, remove the top cover, front panel assembly, DVD mechanism assembly and jack board. 1. Remove the harness band fixing the harness. 2. Disconnect the harness from the connector J9 and J10 on the DSP board. 3. Disconnect the card wire from the connector J1 and J3 on the DSP board. 4. Remove the one screw L attaching the DSP board. 5. Remove the screw M1 and remove the earth wire. 6. Remove the one screw I attaching the DSP board to the rear panel (see fig.7). 7. Pull up the DSP board from the front side upwards disconnecting the connector J2, J5, J6 and J7.
Harness band DSP board
J3 J1
J10 J9
L
J6
J5 J7
J2
(fixing the earth wire)
M1
Fig.9
Main board
M2
Removing the main board
(See Fig.10)
Prior to performing the following procedure, remove the top cover, front panel assembly, power cord, DVD mechanism assembly, jack board and DSP board. ACW2 1. Disconnect the card wire from the connector CW8 on the main board. 2. Disconnect the harness from the connector ACW2, ACW3, ACW4 and ACW5 on the main board. 3. Remove the five screws J attaching the speaker terminals and jack to the rear panel (see fig.7). 4. Remove the nine screws M2 attaching the main board. 5. When the rear panel is not removed, pull up the main board from front side.
CW8
(Rear panel side)
Heat sink1
M2
Heat sink2 ACW3
M2
M2
Heat sink3
Fig.10
Solder part 1 (Each power transistor is fixed)
ACW5 ACW4
Main board (Reverse side )
Removing the power transistor & power IC (See Fig.10 to 12)
Prior to performing the following procedure, remove the top cover, front panel assembly, DVD mechanism assembly, jack board, DSP board and main board. 1. After removing the solder part 1 soldered to the main board, remove each screw and remove the heat sink from the power transistor. 2. After removing the solder part 2 soldered to the main board, remove each screw and remove the heat sink from the power IC.
Solder part 3 (Power IC is fixed) Solder part 2 (Power IC is fixed)
Fig.11
1-7
(Front panel side)
 $4.99 TH-A30 JVC
Circuit Diagrams Set of circuit diagrams. The diagrams will be provided as PDF file. The file will be delivered after…  $4.99 TH-A30 JVC
Owner's Manual Complete owner's manual in digital format. The manual will be available for download as PDF file aft…  $4.99 TH-A30 JVC
Parts Catalog Parts Catalog only. It's available in PDF format. Useful, if Your equipment is broken and You need t…
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