4
VC-A412U/A413U
VC-H812U/H813U
PRECAUTIONS IN PART REPLACEMENT
When servicing the unit with power on, be careful to the section marked white all over.
This is the primary power circuit which is live.
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.
(1) Start and end sensors: Q701 and Q702
Insert the sensor’s projection deep into the upper hole of the holder. Referring to the PWB, fix the sensors tight
enough.
(2) Photocoupler: IC901
Refer to the symbol on the PWB and the anode marking of the part.
(3) Cam switches A and B: D708 and D709.
Adjust the notch of the part to the white marker of the symbol on the PWB. Do not allow any looseness.
(4) Take-up and supply sensors: D707 and D706.
Be careful not to confuse the setting direction of the parts in reference to the symbols on the PWB. Do not allow any
looseness.
Содержание VC-A412U
Страница 6: ...6 VC A412U A413U VC H812U H813U 1 3 LOCATION OF MAJOR COMPONENTS AND CONTROL ...
Страница 50: ...VC A412U A413U VC H812U H813U VC A412U A413U VC H812U H813U 50 51 8 BLOCK DIAGRAM SYSTEM SERVO BLOCK DIAGRAM ...
Страница 53: ...56 VC A412U A413U VC H812U H813U POWER CIRCUIT BLOCK DIAGRAM ...
Страница 63: ...72 VC A412U A413U VC H812U H813U M E M O ...