VC-MH704 (serv.man5). Supplement Service Manual Complete. This service manual covers only those items that differ from the VC-MH834HM. Refer to the Service Manual for VC-MH834HM for further information. - Sharp VCR Service Manual (repair manual)

vc-mh704 (serv.man5) service manual
Model
VC-MH704 (serv.man5)
Pages
24
Size
3.17 MB
Type
PDF
Document
Service Manual
Brand
Device
VCR / Supplement Service Manual Complete. This service manual covers only those items that differ from the VC-MH834HM. Refer to the Service Manual for VC-MH834HM for further information.
File
vc-mh704-sm5.pdf
Date

Read Sharp VC-MH704 (serv.man5) Service Manual online

1
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 speci-
fied be used.
SY7J5VCA582U/
MODELS
VC-MH814HM(S)
VC-MH814LM
VC-MH704HM(S)
VC-MH704LM
VC-MH714HM(S)
VIDEO CASSETTE RECORDER
 CONTENTS
Page
SPECIFICATIONS ....................................................................................................................... 3
ROM MAP .................................................................................................................................... 4
REPLACEMENT PARTS LIST ..................................................................................................... 5
PARTS LIST ............................................................................................................................... 17
PACKING OF THE SET ............................................................................................................. 22
S70157MH814HM
This service manual covers only those items that differ
from the VC-MH834HM.  For further information on items
not covered by this supplement refer to the Service Manual
for VC-MH834HM.
SHARP CORPORATION
SUPPLEMENT SERVICE MANUAL
VC-MH814HM/LM
VC-MH704/714HM/LM
VC-MH814HM ETc 1-4
12/7/01, 11:15 am
1
2
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. Make sure the  PWB sensors are  securely
fitted.
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.
PRECAUTIONS IN PART REPLACEMENT
VC-MH814HM ETc 1-4
12/7/01, 11:15 am
2
3
SPECIFICATIONS
Format: VHS PAL standard
Video recording system: Four rotary heads, helical scan system
Video signal: PAL colour and I signals, 625 lines
Recording/playing time: 240 min max. with an E-240 tape SP
480 min max. with an E-240 tape LP
720 min max. with SHARP E-240 Tape( EP)
Tape width: 12.7mm
Tape speed: 23.39 mm/s SP
11.70 mm/s LP
7.8 mm/s EP
Antenna: 75 ohm unbalanced
Receiving channel: UHF Channel E21-E69;
VHF Channel A
~
J,S1-S41 (VC-MH714/704LM only)
RF converter output signal: UHF Channel E21-E69 (Preset to CH E36)
Power requirement: AC230V-240V, 50Hz
                   Power consumption: Approx. 15W (AC230V/50Hz) and 2.5W stand-by mode
Operating temperature: 5
°C to 40°C
Storage temperature: –20
°C to 55°C
Weight: Approx. 4 kg
Dimensions:
430 mm (W) x 281 mm (D) x 92 mm(H)(VC-MH814HM/LM)
360 mm (W) x 289 mm (D) x 93 mm(H)(VC-MH704HM/LM714HM)
VIDEO
Input: 1.0 Vp-p, 75 ohm
Output: 1.0 Vp-p, 75 ohm
S/N ratio: 48 dB (SP mode)
Horizontal resolution: Approx. 260 lines (SP mode with Super Picture)
AUDIO 0 dBs = 0.775 Vrms
Input: Line1: –3.8 dBs, 10k ohm
Line2: –3.8 dBs, 10k ohm
Line3: –3.8 dBs, 10k ohm
Output: Line1: –3.8 dBs, 1k ohm
Line2: –3.8 dBs, 1k ohm
                                REAR RCA:  - 3.8dBs, 1k ohm
S/N ratio: 46 dB min. (SP mode)
 Frequency response: 80 Hz ~ 10 kHz (SP mode)
80 Hz ~   5 kHz (LP mode)
80 Hz ~   3 kHz (EP mode)
Hi-Fi dynamic range: 85dB TYP
HI-FI WOW and flutter: 0.005% Max
Hi-Fi Frequency responce: 20Hz - 20kHz
Hi-Fi Distortion: 0.5% Max
Hi-Fi closs talk (at 1kHz): 55 dB min.
Accessories included: 75 ohm coaxial cable
Operation manual
Infrared remote control
Batteries
As part of our policy of continuous improvement, we reserve
the right to alter design and specifications without notice.
Note:
The antenna must correspond to the new standard DIN 45325
(IEC 169 - 2) for combined UHF/VHF antenna with 75 ohm connector.
VC-MH814HM ETc 1-4
12/7/01, 11:15 am
3
4
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VC-MH814HM ETc 1-4
12/7/01, 11:15 am
4
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Download Sharp VC-MH704 (serv.man5) Service Manual (Repair Manual)

Here you can read online and download Sharp VC-MH704 (serv.man5) Service Manual in PDF. VC-MH704 (serv.man5) service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sharp VC-MH704 (serv.man5) VCR. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.