DOWNLOAD Sharp VC-M314 (serv.man8) Service Manual ↓ Size: 9.08 MB | Pages: 99 in PDF or view online for FREE

Model
VC-M314 (serv.man8)
Pages
99
Size
9.08 MB
Type
PDF
Document
Service Manual
Brand
Device
VCR / Service Manual Complete
File
vc-m314-sm8.pdf
Date

Sharp VC-M314 (serv.man8) Service Manual ▷ View online

1
VC-M314HM
VC-MH834HM
VIDEO CASSETTE RECORDER
SERVICE MANUAL
SHARP CORPORATION
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.
VC-M314HM
VC-MH834HM
MODELS
 CONTENTS
Page
1. SPECIFICATIONS ................................................................................................................. 3
2. DISASSEMBLY AND REASSEMBLY ................................................................................... 4
3. FUNCTION OF MAJOR MECHANICAL PARTS ................................................................... 8
4. ADJUSTMENT, REPLACEMENT AND ASSEMBLY OF MECHANICAL UNITS ................ 10
5. ELECTRICAL ADJUSTMENT ............................................................................................. 29
6. MECHANISM OPERATION FLOWCHART AND TROUBLESHOOTING GUIDE .............. 35
7. ELECTRICAL TROUBLESHOOTING ................................................................................. 41
8. BLOCK DIAGRAM ............................................................................................................... 59
9. SCHEMATIC DIAGRAM AND PWB FOIL PATTERN ......................................................... 74
10. REPLACEMENT PARTS LIST ............................................................................................ 95
11. EXPLODED VIEW OF MECHANISM PARTS ................................................................... 106
12. PACKING OF THE SET .................................................................................................... 112
(VC-M314HM)
(VC-MH834HM)
S61V8VC-M314H
2
VC-M314HM
VC-MH834HM
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 and IC902
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 looseness.
3
VC-M314HM
VC-MH834HM
1. SPECIFICATIONS
Format: VHS PAL standard
Video recording system: Two rotary heads, helical scan system
Video signal: PAL colour and I signals, 625 lines
Recording/playing time: 240 min max. with SHARP E-240 tape (SP mode)
480 min max. with SHARP E-240 tape (LP mode)
720 min max. with SHARP E-240 tape (EP mode) (VC-MH834HM)
Tape width: 12.7mm
Tape speed: 23.39 mm/s (SP mode)
11.70 mm/s (LP mode)
7.79 mm/s (EP mode) (VC-MH834HM)
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. 14.1W (AC240V/50Hz) and 2.5W max. at standby mode
Operating temperature: 5
°
C to 40
°
C
Storage temperature: –20
°
C to 55
°
C
Weight: Approx. 3.1 kg (VC-M314HM) / 3.7 kg (VC-MH834HM)
Dimensions: 360 mm (W) x 256.9 mm (D) x 92 mm (H) (VC-M314HM)
430 mm (W) x 251 mm (D) x 91 mm (H) (VC-MH834HM)
VIDEO
Input: 1.0 Vp-p, 75 ohm
Output: 1.0 Vp-p, 75 ohm
S/N ratio: 45 dB (SP mode)
Horizontal resolution: 250 lines (SP mode)
AUDIO 0 dBs = 0.775 Vrms
Input: Line1: -3.8 dBs, 10k ohm
Line 2:-3.8 dBs, 10k ohm
Line 3:-3.8 dBs, 47k ohm
Output: Line1: -3.8 dBs, 1k ohm
Line 2:-3.8dBs, 1k ohm
S/N ratio: 46 dB
Frequency responce: 80 Hz ~ 10 kHz (SP mode)
80HZ ~ 5 kHz (LP mode)
Hi-Fi Dynamic Range: 90 dB TYP
Hi-Fi Wow and Flutter: 0.005%
Hi-Fi Frequency Responce: 20 Hz ~ 20 kHz
Hi-Fi Distortion: 0.5% max.
Hi-Fi Crosstalk (at 1kHz): 60 dB min.
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.
As part of our policy of continuous improvement, we reserve the
right to alter design and specifications without notice.
4
VC-M314HM
VC-MH834HM
2. DISASSEMBLY AND REASSEMBLY
2-1  DISASSEMBLY OF MAJOR BLOCKS
(VC-M314HM)
TOP CABINET
: Remove 4 screws 
1
.
FRONT PANEL
: Remove 2 screws 
3
 and 7clips 
4
.
OPERATION
: Remove 1 screw 
5
. Take it out
PWB
of connector 
6
.
MECHANISM/
MAIN PWB
6
5
1
1
7
4
3
8
9
MAIN FRAME
OPERATION 
PWB
4 KEY BUTTON
FRONT PANEL
MECHANISM/
MAIN PWB
TOP CABINET
Remove 2 screws 
7
 , 1 screw 
8
,
and 1 screw 
9
.
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Sharp VC-M314 (serv.man8) Service Manual ▷ Download

  • DOWNLOAD Sharp VC-M314 (serv.man8) Service Manual ↓ Size: 9.08 MB | Pages: 99 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sharp VC-M314 (serv.man8) in PDF for free, which will help you to disassemble, recover, fix and repair Sharp VC-M314 (serv.man8) VCR. Information contained in Sharp VC-M314 (serv.man8) Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.