VC-M331HM. Contents, precautions and specifications - Sharp VCR Specification (repair manual)

vc-m331hm specification
Model
VC-M331HM
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3 Few pages! See other manuals at the bottom of the first or last page.
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18.26 KB
Type
PDF
Document
Specification
Brand
Device
VCR / Contents, precautions and specifications
File
vc-m331hm.pdf
Date

Read Sharp VC-M331HM Specification online

1
VC-M321HM
VC-M331HM
SERVICE MANUAL
VIDEO CASSETTE RECORDER
In the interests of user-safety (Required by safety regula-
tions in some countries) the set should be restored to its
original condition and only parts identical to those specified
be used.
MODELS VC-M321HM/VC-M331HM
S58P8VC-M321H
MODELS
SERVICE MANUAL
VC-M321HM
VC-M331HM
VIDEO CASSETTE RECORDER
SHARP CORPORATION
 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. ELECTRICAL TROUBLESHOOTING ................................................................................. 37
8. BLOCK DIAGRAM ............................................................................................................... 51
9. SCHEMATIC DIAGRAM AND PWB FOIL PATTERN ......................................................... 61
10. REPLACEMENT PARTS LIST ............................................................................................ 75
11. EXPLODED VIEW OF MECHANICAL PARTS ................................................................... 88
12. PACKING OF THE SET ...................................................................................................... 93
VC-M321HM
VC-M331HM
2
VC-M321HM
VC-M331HM
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 D705.
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: D711 and D712.
Be careful not to confuse the setting direction of the parts in reference to the symbols on the PWB. Do not allow any
losseness.
3
VC-M321HM
VC-M331HM
1. SPECIFICATIONS
Format: VHS PAL standard
Video signal: PAL colour and I signals, 625 lines
Recording/playing time: 240 min max. with SHARP E-240 tape (PAL/SP)
480 min max. with SHARP E-240 tape (PAL/LP)
Tape width: 12.7mm
Tape speed: 23.39 mm/s (PAL/SP)
11.70 mm/s (PAL/LP)
Antenna: 75 ohm unbalanced
Receiving channel: UHF Channel E21-E69
RF converter output signal: UHF Channel E21-E69 (Preset to CH E36)
Power requirement: AC230V~240V, 50Hz
Power consumption: Approx. 14 W (AC230V/50Hz) and 3.5W max. at stand-by mode
Operating temperature: 5
°
C to 40
°
C
Storage temperature: –20
°
C to 55
°
C
Weight: Approx. 3.2 kg
Dimensions: 360 mm (W) x 284 mm (D) x 93 mm (H)
(14-3/16" x 11-3/16 " x 3-25/32")
VIDEO
Input: 1.0 Vp-p, 75 ohm
Output: 1.0 Vp-p, 75 ohm
S/N ratio: 45 dB (SP mode)
Horizontal resolution: Approx. 260 lines (SP mode with Supper Picture)
AUDIO 0 dBs = 0.775 Vrms
Input: Line1: –3.8 dBs, 10k ohm
Line2: –3.8 dBs, 10k ohm
Output: Line1: –3.8 dBs, 1k ohm
Line2: –3.8 dBs, 1k ohm
S/N ratio: 46 dB min. (SP mode)
Frequency responce: 80 Hz ~ 10 kHz (SP mode)
80 Hz ~ 5 kHz (LP mode)
Accessories included: 75 ohm coaxial cable
Operation manual
Infrared remote control
Battery
Note: The antenna must correspond to the new standard DIN 45325
(IEC 169 - 2) for combined UHF/VHF antenna with 75 ohm connector.
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