VC-MH85 (serv.man3). Service manual front cover - Sharp VCR Service Manual (repair manual)

In the interests of user-safety (Required by safety regulations in some
countries) the set should be restored to its original condition and only parts
identical to those specified be used.

Page

1. SPECIFICATIONS ................................................................................................................. 3
2. DISASSEMBLY AND REASSEMBLY ................................................................................... 4
3. FUNCTION OF MAJOR MECHANICAL PARTS ................................................................... 7
4. ADJUSTMENT, REPLACEMENT AND ASSEMBLY OF MECHANICAL UNITS .................. 9
5. ELECTRICAL ADJUSTMENT ............................................................................................. 28
6. MECHANISM OPERATION FLOWCHART AND TROUBLESHOOTING GUIDE .............. 35
7. TROUBLESHOOTING ........................................................................................................ 41
8. BLOCK DIAGRAM ............................................................................................................... 56
9. SCHEMATIC DIAGRAM AND PWB FOIL PATTERN ......................................................... 6

4

10. REPLACEMENT PARTS LIST ............................................................................................ 84
11. EXPLODED VIEW OF MECHANISM PARTS ..................................................................... 93
12. PACKING OF THE SET .................................................................................................... 100

When checking the soldering side in the tape travel mode, make sure first that the tape has been loaded and then turn

over the PWB with due care to the primary power circuit.

Make readjustment, if needed after replacement of part, with the mechanism and its PWB in position in the main frame.

Insert the sensor’s projection deep into the upper hole of the holder. Referring to the PWB, fix the sensors tight
enough.

Refer to the symbol on the PWB and the anode marking of the part.

Adjust the notch of the part to the white marker of the symbol on the PWB. Do not allow any looseness.

Be careful not to confuse the setting direction of the parts in reference to the symbols on the PWB. Do not allow
any looseness.