VC-MH703. Complete Service Manual - Sharp VCR Service Manual (repair manual)

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.

MODELS

Page

SPECIFICATIONS ....................................................................................................................... 3
ROM MAP .................................................................................................................................... 4
REPLACEMENT PARTS LIST ..................................................................................................... 5
PACKING OF THE SET ............................................................................................................. 11

S50046VC713HM

This service manual covers only those items that differ
from the VC-MH713HM(S).  For further information on
items not covered by this supplement refer to the Service
Manual for VC-MH713HM(S).

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.

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.

Refer to the symbol on the PWB and the anode marking of the part.

Adjust the notch of the part to the white marker symbol on the PWB. The part  must be flat to the PWB.

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.

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 an E-240 tape SP

480 min max. with an E-240 tape LP

Tape width: 12.7mm

Tape speed: 23.39 mm/s SP

11.70 mm/s LP

Antenna: 75 ohm unbalanced

Receiving channel: UHF Channel E21-E69;

VHF Channel E2 - S41 (VC-MH713LM 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 3W 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 289 mm (D) x 93 mm (H)

(14-3/16" x 12-1/32" x 3-21/32")

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)

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.

MODEL

VC-MH713LM

blank

blank

EP n * *

NTSC Luminance level

EP n * *

NTSC Chrominance level

SP n * *

NTSC Luminance level

SP n * *

NTSC Chrominance level

LP p * *

PAL Luminance level

LP p * *

PAL Chrominance level

blank

blank

SP p * *

PAL Luminance level

SP p * *

PAL Chrominance level

"0"

fixed

JP39

A.DUB

JP38

NOT SLOW ATR

JP37

SQ PB

JP36

NTSC PB

JP35

NTSC SKEW

JP34

HEAD2

JP33

HEAD1

JP32

HEAD0

JP31

GAMMA correction

JP30

L/P-5 min

JP29

84 channel

JP28

R/C CODE 1

JP27

DNR

JP26

POST CODE

JP25

SAT CTL

JP24

AV LINK / 16 x 9

JP23

Hi-Fi

JP22

SORT/CLOCK

JP21

DECODER

JP20

SURROUND

JP19

IGR

JP18

NICAM

JP17

G-CODE1

JP16

G-CODE0

JP15

OEM

JP14

LP mode

JP13

F-AV

JP12

2 SCART

JP11

No RF OUT

JP10

TUNER2

JP 9

TUNER1

JP 8

TUNER0

JP 7

SYSTEM1

JP 6

SYSTEM0

JP 5

X 380 FF/REW

JP 4

LOW POWER

JP 3

N/A

JP 2

VPS/PDC

JP 1

COLOUR 1

JP 0

COLOUR 0
DISPLAY IN HEXADECIMAL
NOTATION

12A0

0:LIGHT UP

1:FLASHING

VC-MH713HM(G)

VC-MH703HM(G)

--
0
7
0
7
3
3
--
4
4

0
0

0

0

0
0
0

1
0
0
0
0
0
0
0
0
0
1
0
1

0
0
1
1
1

0
1
1

1
0
0

1
1
0
0
0

0
0

0
0

0

--
0
7
0
7
3
3
--
4
4

0
0

0

0

0
0
0

1
0
0
0
0
0
0
0
0
0
1
0
1

0
0
1
1
1

0
1
1

1
0
1

0
0
0
0
0

0
0

0
0

0

--
0
7
0
7
3
3
--
4
4

0
0

0

0

0
0
0

1
0
0
0
0
0
0
0
0
0
1
0
1

0

0
1
1
1

0
1
1

1
0
0
1
1
0
0
0

0
0

0
0

0

070733
440020 
0A77300

070733
440020 
0A77400

070733
440020 
0A77300