Read Sharp VC-MH85 (serv.man9) Service Manual online
31
VC-MH705HM/LM
VC-MH815HM/LM,MH85HM
VC-MH715HM,MH835HM
VC-MH815HM/LM,MH85HM
VC-MH715HM,MH835HM
Observe the video output using the osiloscope and con-
firm as the above diagram
firm as the above diagram
*
V:200mV/div
H:20
H:20
µ
sec/div
Measuring
instrument
instrument
Mode
Cassette
Spectrum
Analyzer
Analyzer
Record
Self-recorded tape
Test point
YC CHIP Pin98
Specification
3.8MHz
±
50KHz
ADJUSTMENT OF FM Carrier Confirmation
VIDEO
PAL Colour Bar(1Vp-p)
Measuring
instrument
instrument
Mode
Cassette
Osiloscope
Record
Self-recorded tape
(SP/EP mode)(See Note below)
(SP/EP mode)(See Note below)
Test point
VIDEO OUT 21PIN or RCA Port
(75
(75
Ω
Terminal)
Specification
1.0
±
0.2Vp-p
Y/C CIRCUIT ADJUSTMENT
ADJUSTMENT OF EE Level Confirmation
VIDEO
PAL Colour Bar(1Vp-p)
Measuring
instrument
instrument
Mode
Cassette
Spectrum
Analyzer
Analyzer
Record
Self-recorded tape
Test point
YC CHIP Pin98
Specification
4.8MHz
±
100KHz
ADJUSTMENT OF Deviation Confirmation
VIDEO
Colour Bar(1Vp-p)
Measuring
instrument
instrument
Mode
Cassette
Osiloscope
Self-recorded/Playback tape
Test point
YC CHIP Pin98
Specification
about300mVp-p
ADJUSTMENT OF REC Current Confirma-
tion
tion
VIDEO
Colour Bar(1Vp-p)
1.0Vp-p
Record
<Diagram A>
Confirm the Sink chip is as the
left diagram <Diagram A>.
left diagram <Diagram A>.
Sink Chip
3.80
4.80MHz
A
f
<Deviation>
Confirm the white peak frequency
follow the standard value.
(the deviation between shinkchip and
f white peak is 1MHz
Confirm the white peak frequency
follow the standard value.
(the deviation between shinkchip and
f white peak is 1MHz
±
100KHz)
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