Sharp VC-MH705HM/LM Service Manual page 12

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Y/C CIRCUIT ADJUSTMENT
ADJUSTMENT OF EE Level Confirmation
Measuring
instrument
Mode
Cassette
Test point
VIDEO
Specification
Observe the video output using the osiloscope and con-
firm as the above diagram
* V:200mV/div
H:20µ sec/div
ADJUSTMENT OF FM Carrier Confirmation
Measuring
instrument
Mode
Cassette
Test point
VIDEO
Specification
Osiloscope
Record
Self-recorded tape
(SP/EP mode)(See Note below)
VIDEO OUT 21PIN or RCA Port
(75Ω Terminal)
PAL Colour Bar(1Vp-p)
1.0±0.2Vp-p
1.0Vp-p
Spectrum
Analyzer
Record
Self-recorded tape
YC CHIP Pin98
PAL Colour Bar(1Vp-p)
3.8MHz±50KHz
Digitized in Heiloo the Netherlands
ADJUSTMENT OF Deviation Confirmation
Measuring Spectrum
instrument Analyzer
Mode Record
Cassette Self-recorded tape
Test point YC CHIP Pin98
VIDEO Colour Bar(1Vp-p)
Specification 4.8MHz±100KHz
<Deviation>
A
Confirm the white peak frequency
follow the standard value.
(the deviation between shinkchip and
f white peak is 1MHz±100KHz)
f
3.80 4.80MHz
ADJUSTMENT OF REC Current Confirma-
tion
Measuring Osiloscope
instrument
Record
Mode
Cassette Self-recorded/Playback tape
Test point YC CHIP Pin98
VIDEO Colour Bar(1Vp-p)
Specification about300mVp-p
<Diagram A>
Sink Chip
31
VC-MH705HM/LM
6/17/2019
VC-MH815HM/LM,MH85HM
VC-MH715HM,MH835HM
Confirm the Sink chip is as the
left diagram <Diagram A>.
Not for sale!