Read Sharp VC-M305HM (serv.man7) Service Manual online
29
VC-M305HM/LM
VC-M315HM/LM
VC-M315HM/LM
Observe the video output using the oscilloscope and confirm as
the above diagram
the above diagram
*
V:200mV/div
H:20
H:20
µ
sec/div
Measuring
instrument
instrument
Mode
Cassette
Spectrum
Analyzer
Analyzer
Recorded
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
Oscilloscope
Recorded
Self-recorded tape
(SP/LP mode)(See Note below)
(SP/LP 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
Recorded
Self-recorded tape
Test point
YC CHIP Pin98
Specification
4.8MHz
±
100KHz
ADJUSTMENT OF Deviation Confirmation
VIDEO
Colour Bar(1Vp-p)
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)
Measuring
instrument
instrument
Mode
Cassette
Oscilloscope
Self-recorded/Playback tape
Test point
YC CHIP Pin98
Specification
about300mVp-p
ADJUSTMENT OF REC Current Confirma-
tion
tion
VIDEO
Colour Bar(1Vp-p)
<Diagram A>
Confirm the Sink chip is as the
left diagram <Diagram A>.
left diagram <Diagram A>.
1.0Vp-p
Sink Chip
Recorded
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