SHARP VC-MH761 GM free download

File name vcmh761.pdf

SUPPLEMENT SERVICE MANUAL S6048VCMH76GM SY7J5VCA582U/ VIDEO CASSETTE RECORDER MODELS VC-M H76GM(S) VC-MH76SM(S) VC-MH75SM(SS) VC-MH761GM(BK) VC-MH761GM(S/BK) VC-MH76GM(S) VC-MH75SM(SS) VC-MH750SM(SS/S/SN) VC-MH76SM(SS/SN) VC-MH761SM(BK) VC-MH745SM(S) 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. This service manual covers only those items that differ from the VC-MH761SM(S). For further information on items not covered by this supplement refer to the Service Manual for VC-MH761SM(S). VC-MH761SM(S) VC-MH745SM(S) VC-MH750SM(S) VC-MH761GM(S) CONTENTS Page SPECIFICATIONS ... 2 ROM MAP ... 4 CIRCUIT DIAGRAMS ... 5 REPLACEMENT PARTS LIST ... 15 PACKING OF THE SET ... 22 SHARP CORPORATION 1 PRECAUTIONS IN PART REPLACEMENT When servicing the unit with power on, be careful of the section outlined in white. This is the primary power circuit which is live. When checking the solder side in the tape travel mode, make sure 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. When replacing the mechanism on the PWB care should be taken that the sensors locate into the mechanism holder. (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 D705. Adjust the notch of the part to the white marker symbol on the PWB. The part must be flat to the PWB. (4) Take-up and supply sensors: D711 and D712. Be careful not to confuse the setting direction of these parts in reference to the symbols on the PWB. The part must be flat to the PWB. 2 SPECIFICATIONS Format: VHS PAL standard Video recording system: Two rotary heads, helical scan system Video signal: PAL/SECAM colour and B/G signals, 625 lines Recording/playing time: 240 min max. with SHARP E-240 tape (PAL SP) 480 min max. with an E-240 tape (LP) Tape width: 12.7mm Tape speed: 23.39 mm/s (PAL SP) 11.70 mm/s (PAL LP) 33.35 mm/s (NTSC SP) 16.67 mm/s (NTSC LP) 11.12 mm/s (NTSC EP) Antenna: 75 ohm unbalanced Receiving channel: VHF