DOWNLOAD Sharp VC-MH704 (serv.man7) Service Manual ↓ Size: 7.98 MB | Pages: 42 in PDF or view online for FREE

Model
VC-MH704 (serv.man7)
Pages
42
Size
7.98 MB
Type
PDF
Document
User Manual / Operation Manual
Brand
Device
VCR / Operation Manual
File
vc-mh704-sm7.pdf
Date

Sharp VC-MH704 (serv.man7) User Manual / Operation Manual ▷ View online

33
MORE INFORMATION ABOUT YOUR VCR
SPECIFICATIONS
Specifications are subject to change without notice as part of our policy 
of continuous improvement.
No liability is accepted for any inaccuracies or omissions in this 
publication, although every possible care has been taken to make it 
complete and as accurate as possible.
Format:
VHS PAL  standard
Number of heads:
SIX
Video signal system:
PAL colour or monochrome signal: 625 lines
Hi-Fi audio recording 
system:
Deep layer recording system conforming to 
stereo Hi-Fi VHS standard.
Maximum playing time:
240 min. with E-240 video cassette in Standard 
Play (SP) mode
480 min. with E-240 video cassette in Long Play 
(LP) mode
720 min. with E-240 video cassette in Extended 
Play (EP) mode
Tape width:
12.7 mm
Tape speed:
23.39 mm/s Standard Play (SP)
11.70 mm/s Long Play (LP)
 7.8mm/s Extended Play (EP)
Antenna:
75 
Ω unbalanced
Reception channels:
UHF channel 21-69
(
VHF Channels A-J VC-MH704LM only)
RF output signal:
UHF channel 21-69
Power requirement:
AC 230-240V, 50 Hz
Power consumption:
17 W approx. (Standby power consumption 2.5W)
Operating temperature:
5 ˚C  to 40 ˚C
Storage temperature:
-20 ˚C  to 55 ˚C
Video input:
1.0 Vp-p, 75 
Video output:
1.0 Vp-p, 75 
Audio input:
Line1&2: -3.8 dBs, 10 k
Ω, Line 3: -3.8 dBs, 47 kΩ
Audio output:
Line1&2: -3.8 dBs, 1 k
Ω, Audio out: -3.8 dBs, 1 kΩ
Hi-Fi audio:
Dynamic range: ~90dBs typ. (SP);
Frequency response: 20 Hz - 20 kHz; 
Wow and Flutter:<0.005% Wrm (JIS A)
Dimensions:
360(W) x 289(D) x 93(H) mm
Weight:
3.2 kg (approx.)
Supplied accessories:
75 
Ω RF Connection cable, operation manual, 
remote control, AA/R6/UM3 battery (x2)
TINS-3992UMZZ English.book  Page 33  Wednesday, May 9, 2001  12:25 PM
 
34
 
 www.sharp.co.uk/support
 
TROUBLESHOOTING
 
TROUBLESHOOTING
 
BEFORE REQUESTING SERVICE!
 
The following conditions do not always denote trouble. Therefore, perform the checks 
described below before calling for service. If the problem cannot be corrected by the use of 
this guide, remove the mains plugs from the wall socket and contact the dealer or supplier 
from whom the unit was purchased in order to obtain service. Where this is not possible, please 
contact the telephone number listed below, you will then be given details of how to obtain 
service.
 
Tel. 
 
08705 274277 
 
(office hours)
 
 or (01) 676 0648 
 
if telephoning from Ireland
 
- Please note: All calls will 
be charged at local rate.
 
AREA
PROBLEM
POSSIBLE CAUSE/CURE
 
INSTALLATION
 
TV will not tune in to 
the VCR. 
• Check all the cables are correctly 
connected.
• Check your TV manual for correct tuning of 
your TV.
Auto Installation 
screen does not 
appear when the VCR 
is switched on OR Auto 
Installation is not 
complete.
• Reset the VCR and complete AUTO 
INSTALLATION again. (Refer to VCR Reset at 
the back of the book.)
 
POWER
 
Display is not working.
• Make sure the power cord is plugged in.
• Make sure the wall socket has power (check 
by plugging another appliance in).
VCR will not operate - 
 appears in VCR 
display.
• Press the 
 
TIMER ON/OFF 
 
 button to 
disengage timer.
VCR will not respond to 
any commands.
• Check the CHILD LOCK is not engaged.
• Safety device operating: unplug VCR for 2 
hours.
 
PLAYBACK
 
No picture appears.
• Make sure the TV is set to the video channel.
• Check all connecting cables.
Playback picture is 
snowy.
• Adjust the tracking using the 
 
VCR CHANNEL
 
 
/
 
 
buttons
 
.
• Try another tape.
• The video heads may have been 
contaminated - refer to a SHARP Service 
Facility. 
Playback/Recording 
does not play back in 
Stereo
• Ensure the VCR is connected to a stereo TV 
with a SCART lead.
• Programme may not carry stereo.
 
RECORDING
 
Tape is automatically 
ejected when pressing 
the 
 
REC  
 
 or 
 
TIMER ON/OFF
 
 
 
 
buttons.
• The record-protection tab has been 
removed from the cassette.
 
TINS-3992UMZZ English.book  Page 34  Monday, June 4, 2001  9:28 AM
 
35
 
TROUBLESHOOTING
 
TROUBLESHOOTING
 
AREA
PROBLEM
POSSIBLE CAUSE/CURE
 
RECORDING
 
VIDEOPLUS+ does not 
record desired 
programme.(VC-
MH714HM only)
• Broadcast does not carry VPS/PDC signal 
which alters recording time.
• Check VPS/PDC mode is switched ON.
• Ensure date and time are correctly set on the 
VCR.
 
TAPE 
TRANSPORT/
MECHANISM
 
Tape can not be 
loaded.
• Make sure there is no other tape in the VCR.
• Make sure you are loading the tape 
correctly.
Rewind is not 
possible.
• Make sure the tape is not at the start.
 
REMOTE 
CONTROL
 
The VCR can not be 
operated by remote 
control.
• Remote control is too far away from the main 
unit.
• Point the remote control at the VCR.
• Batteries are flat - replace both.
• Batteries have not been inserted correctly.
• VCR is positioned in strong light.
 
OTHER 
PROBLEMS
 
Picture does not 
change even though 
the 
 
VCR CHANNEL
 
 
 
 
 
/
 
 buttons
 
 are 
pressed. 
• Make sure the VCR is not in Timer or Menu 
mode.
Desired channel 
position can not be 
selected.
• The channel position has been set to be 
skipped. Cancel the SKIP mode for that 
channel.
No colour or poor TV 
picture on normal 
viewing.
• Make sure all the cables are connected 
properly.
• Make sure the VCR power cord is properly 
plugged in.
Not possible to view 
picture or playback 
through RF OUT.
• Make sure the RF OUTPUT has not been 
switched off. (Refer to page 36, RF CHANNEL 
TUNING and RF THROUGH ON/OFF)
Desired channel has 
interference.
• Possible weak signal strength, the same 
channel with a better signal strength may 
have been tuned in on another VCR preset 
channel. Example;
VCR preset 1 = BBC1 and 
VCR preset 14 = BBC1
(Refer to Manually Sorting Channels section 
to move the channel to your desired 
position.)
• TV aerial may need adjusting.
No picture appears.
• Make sure the TV is on the video channel.
• Check all connecting cables.
 
TINS-3992UMZZ English.book  Page 35  Monday, June 4, 2001  9:28 AM
 
36
 
 www.sharp.co.uk/support
 
VCR RESET
 
1.
 
Press the 
 
STOP
 
 
 button on the front of the VCR.
 
2.
 
Press and hold 
 
MENU
 
 
  and 
 
CHANNEL DOWN
 
 
 buttons together on the 
front of the VCR for 10 seconds.
 
 
VCR RESET IS NOW COMPLETE
 
Please continue with your previous procedure.
 
RF CHANNEL TUNING
 
If you have a preferred RF output channel this can be set manually between channels 21 and 
69 by following the procedure below.
 
1.
 
Press the 
 
STANDBY 
 
 button.
 
2.
 
Press and hold the 
 
MENU
 
 
 button for 3 seconds.
 
3.
 
Wait for a flashing channel number to appear on the VCR display.
 
4.
 
The channel number can now be changed by using the 
 
VCR CHANNEL 
 
/
 
buttons.
 
5.
 
Your TV will now require tuning to the new 
channel. (The screen opposite should be 
displayed on the TV)
 
6.
 
Press the 
 
SET 
 
 button to store.
 
RF THROUGH ON/OFF: 
 
If you wish to connect your VCR to the TV with only a scart lead, the RF Output on your VCR 
can be turned OFF and ON. To do this press the 
 
CLEAR
 
 
  then 
 
SET
 
 
  buttons on the 
remote control at point 3 from 
 
RF CHANNEL TUNING 
 
above. 
 
or
 
 at point 4 of 
 
AUTO 
TUNING 
 
on page 5. This will help minimise interference.
STOP
V CR R F
S E T
: E N T E R
ME NU : E X I T
SET
SET
 
 (White text                                                              
blue background)
 
TINS-3992UMZZ English.book  Page 36  Monday, June 4, 2001  9:43 AM
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