VC-MH85 (serv.man9). Electrical Adjustments - Sharp VCR Service Manual (repair manual). Page 6

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33
VC-MH705HM/LM
VC-MH815HM/LM,MH85HM
VC-MH715HM,MH835HM
ADJUSTMENT OF LINE3(FRONT) INPUT
Level Confirmation HIFI Lch, Rch
ADJUSTMENT OF Receive Image CH
Display eg:
JP : 
 
 
0
0
3
4
3
0
0
0
1
4
HEX CODE for Initial Jumper
YC :
34
34
07
07
PAL
PAL
NTSC
NTSC
SP
LP/EP
SP
EP
VM : F8FB
←
Video Mode
NOR__ 
 ←
 ROM Version
Mode
EE
Measuring
instrument
Mode
Cassette
Voltmeter
EE
Self-recorded tape
Test point
AUDIO OUT
Specification
-3.8
±
2dBs
VIDEO
Optional
AUDIO
AUDIO IN at 1KHz -3.8dBs
Confirm that there is no noise and beat in the receiving strenght
and weakness electrics signal.
Measuring
instrument
Mode
Monitor Screen
EE
Specification
<On Screen Display>
Jumper List
On Screen Display confirm Display
Reference
TIMER Circuit ADJUSTMENT
ADJUSTMENT OF Timer Initial JP and Y/C
Rec Current Confirmation
3. After confirmation, Release the TEST code (R/C code
47H), display will return to EE mode.
1. During EE mode, send the TEST Code (R/C code 47H)
to VCR and hold the Test code, do not let go.
2. While sending the TEST code, the monitor screen will
display the initial JP and Y/C Rec Current setting,
Video mode and ROM Version condition.
Measuring
instrument
Mode
Digital Voltmeter
EE
Specification
2.5
±
0.5V
TUNER/IF  Circuit ADJUSTMENT
ADJUSTMENT OF AFT Adjustment
Confirmation(except France)
Test point
TU101 pin23
E-12ch, Input level 70dB
µ
While selecting channel input TEST MODE(press once
on TEST KEY R/C) and select E-12ch.
(Just Tuning)
Adjustment
HM
I40ch
LM
I-Jch
ADJUSTMENT OF AFT Adjustment Confir-
mation (France)
F-10ch, Input level 70dB
µ
While selecting channel input TEST MODE(press once
on TEST KEY R/C) and select F-10ch.
(Just Tuning)
F-4ch, Input level 70dB
µ
While selecting channel input TEST MODE(press once
on TEST KEY R/C) and select F-4ch.
(Just Tuning)
Measuring
instrument
Mode
Digital Voltmeter
EE
Specification
2.5
±
0.5V
Test point
TU101 pin23

Display

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