Text preview for : VC-TA350_351_352_355_356.pdf part of Sharp VC-TA350 351 352 355 356 Sharp VCR & VCP VC-TA350_351_352_355_356.pdf
Back to : VC-TA350_351_352_355_356. | Home
VC-TA350/TA351/351W
VC-TA352W/TA355/TA356
SERVICE MANUAL
S70E1VC-TA350
VIDEO CASSETTE RECORDER
VC-TA350
VC-TA352W Only VC-TA351
VC-TA351W
VC-TA352W
VC-TA355
MODELS VC-TA356
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.
CONTENTS
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 .............. 31
7. TROUBLESHOOTING ........................................................................................................ 37
8. BLOCK DIAGRAM ............................................................................................................... 48
9. SCHEMATIC DIAGRAM AND PWB FOIL PATTERN ......................................................... 56
10. REPLACEMENT PARTS LIST ............................................................................................ 68
11. EXPLODED VIEW ............................................................................................................... 75
12. PACKING OF THE SET ...................................................................................................... 79
SHARP CORPORATION
1
VC-TA350/TA351/351W
VC-TA352W/TA355/TA356
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: IC902
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.
2
VC-TA350/TA351/351W
VC-TA352W/TA355/TA356
1. SPECIFICATIONS
Format: VHS PAL/MESECAM/NTSC standard
Video recording system: Rotary, slant azimuth two heads helical scan system
Video signal: PAL/MESECAM/NTSC colour or monochrome (System B/G, I, D/K) signals
Recording/playing time: 240 min max. with SHARP E-240 tape (PAL: SP mode)
480 min max. with SHARP E-240 tape (PAL: LP mode)
(Only for VC-TA351/TA351W, TA352W, TA355, TA356)
160 min max. with SHARP T-160 tape (NTSC: SP mode)
480 min max. with SHARP T-160 tape (NTSC: EP mode)
(Only for VC-TA351/TA351W, TA352W, TA355, TA356)
Tape width: 12.7mm
Tape speed: 23.39 mm/s (PAL: SP mode)
11.70 mm/s (PAL: LP mode)
33.35 mm/s (NTSC: SP mode)
16.67 mm/s (NTSC: LP mode) (Playback only)
11.12 mm/s (NTSC: EP mode)
Antenna: 75 ohm unbalanced
Receiving channel: VHF Channel 1A - S41, UHF Channel E21 - C57
RF converter output signal: UHF Channel E21 - E69 Adjustable preset to E60 (For A/M/B/W-version)
UHF Channel E21 - E69 Adjustable preset to E39 (For S/K/L-version)
Power requirement: AC110 - 240V, 50/60Hz
Power consumption: Approx. 13W at 240V/50Hz
Operating temperature: 5