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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.
4-16. Rotary Switch, Cam Relay Gear, Change Gear Assembly, Timing Belt
Before replacing the timing belt, remove the guide rail T2 and capstan motor. (Refer to 4-4.)
1. Removal procedure
1) 2) 3) 4) 5) 6) 7) Remove the LS chassis block assembly. (Refer to 4-10.) Remove the guide lock plate (T), pinch pressure assembly and eject arm. (Refer to 4-15.) Remove the cam relay gear 1. Remove the timing belt 2. Remove the HLW cut (0.98 � 3 � 0.25) 3 and change gear assembly 4. Remove the four solderings 5 and remove the FP-299 flexible wiring board 6. Push up the dowel of the rotary switch 7 from the bottom of the mechanism chassis assembly and remove the rotary switch in the direction of the arrow.
2. Attachment procedure
1) Insert the dowel of the rotary switch 7 into the hole on the mechanism chassis assembly and attach the rotary switch clockwise. Align the FP-299 flexible wiring board 6 with the reference hole on the mechanism chassis and solder the flexible wiring board to the rotary switch 7 (at four locations). Attach the change gear assembly 4 with the HLC cut (0.98 � 3 � 0.25)3. Attach the timing belt 2.
Note: There must be a clearance between the rotary switch 7 and timing belt 2.
2)
3) 4) 5)
6) 7) 8)
Attach the cam relay gear 1. The in-phase markings of the rotary switch 7, cam relay gear (2) and cam relay gear (1) must be aligned. Attach the guide lock plate (T), pinch pressure assembly and eject arm. (Refer to 4-15.) Attach the LS chassis block assembly to the mechanical chassis. (Refer to 4-10.) Clean the shaft of the capstan motor. (Refer to 2-2.)
7 Remove the rotary switch in the direction of the arrow.
Attachment direction The ribs must be facing upward. Dowel
Clearance must exist between the claw of the rotary switch and the belt.
1 Cam relay gear (2)
SETTING THE GEAR POSITION
3 HLW cut (0.98 � 3 � 0.25)
Hole of mechanism chassis Rotary switch Cam relay gear (2) Cam relay gear (1)
Belt must be completely free from twist or stain when it is installed
4 Change gear assembly
5 Remove the four solderings
Bend here at right angles.
2 Timing belt
Cam relay gear (1)
6 FP-299 flexible board
Align the holes.
When attaching it, coat the hatched portion with grease.
Fig. 4-16.
� 29 �
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