Sharp VC-G20SM Serviceanleitung Seite 29

Y/C CIRCUIT ADJUSTMENT
ADJUSTMENT OF EE Level Confirmation
Measuring Oscilloscope
instrument
Mode
Record
Cassette Self-recorded tape
(SP/LP mode)(See Note below)
Test point VIDEO OUT 21PIN or RCA Port
(75Ω Terminal)
VIDEO PAL Colour Bar(1Vp-p)
Specification 1.0±0.2Vp-p
Observe the video output using the oscilloscope and confirm as
the above diagram
* V:200mV/div
H:20µ sec/div
ADJUSTMENT OF FM Carrier Confirmation
Measuring Spectrum
instrument Analyzer
Mode Record
Cassette Self-recorded tape
Test point YC CHIP Pin98
VIDEO PAL Colour Bar(1Vp-p)
Specification 3.8MHz±50KHz
ADJUSTMENT OF Deviation Confirmation
1.0Vp-p
ADJUSTMENT OF REC Current Confirma-
tion
<Diagram A>
29
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
Measuring Oscilloscope
instrument
Record
Mode
Cassette Self-recorded/Playback tape
Test point YC CHIP Pin98
VIDEO Colour Bar(1Vp-p)
Specification about300mVp-p
Sink Chip
VC-G20SM/G200SM
VC-G201SM/G401SM
Confirm the Sink chip is as the
left diagram <Diagram A>.