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CLD-D503, CLD-D570
1.6.5 ELECTRICAL ADJUSTMENT
ADJUSTMENT TABLE OF MAIN ASSY
Ez
Adjustment name
Adjustment point
Measuring equipment and jigs
Measurement point
PLL offset adjustment
Master clock adjustment
Video level adjustment
VR450 (VIDEO LEV.1)
before A/D
Y output level adjustment
S—C SYNC level
adjustment
C output level adjustment
1-31
+ Oscilloscope
* DC Volt meter
* STD-—-901 or STD—902
(or LDD disc)
« Frequency counter
+ Oscilloscope
+ GGV1003
* TV monitor
* Oscilloscope
* GGV1003
* TV monitor
* Oscilloscope
* GGV1003
* TV monitor
+ Oscilloscope
« GGV1003
Digital sound terminal
W435
- IC400 (PAODS8A)
@pin
Video output terminal
(75Q terminated)
(NOTE1)
Video output terminal
(75Q. terminated)
(NOTE1)
Video output terminal
(75Q terminated)
(NOTE1)
1¢400
(PAOO58A)
@pin
Player condition
+ Test mode
Tilt servo ON
TRK servo ON/OFF
+ Digital sound play
- POWER ON
- STOP
+ Normal mode
* GGV1003
#19,900still
+ Normal mode
* GGV1003
#19,900still
+ Normal mode
- GGV1003
#19,900still
* Normal mode
- GGV1003
#19,900still
Adjustment procedure
With TRK Servo OFF, play digital sound and coarsely adjust VR612 so that
sound is produced.
.
Connect W435 and DC voltmeter and while playing digital sound, turn TRK
Servo on and off. Adjust VR612 so that DC voitage difference between ON
and OFF conditions is 0 0.05V.
Connect 14MHz TP(W616) and frequency counter.
Adjust VC901
so that
frequency with power ON (stop) is 14.31818MHz =£10Hz.
Connect IC400 @pin and oscilloscope.
When stilled with GGV1003 #19,900
(composite), measure video signal.
Adjust VR450 until level from sync tip to 100% white becomes 1.633Vp—p +
3%,
Connect video output terminal and oscilloscope.
terminated with 75Q)
When stilled with GGV1003 #19,900 (composite), measure video signal and
adjust VR702 until level from pedestal to 100% white becomes 0.714Vp—p
5%.
(video output terminal is
Connect video output terminal and oscilloscope.
(video output terminal is
terminated with 75Q)
When stilled with GGV1003 #19,900 (composite), measure video signal and
adjust VR704 until level from sync tip to 100% white becomes 1.0Vp—p +5%.
Connect video output terminal and CH1
of oscilloscope.
'(video output
terminal is terminated with 75)
Connect !C400 @pin and CH2 of oscilloscope.
With oscilloscope CH2 input level knob (V/Div), adjust so that level from video
signat sync tip to 100% white for CH1 and CH2 are equal.
Adjust VR703 until chroma signal levels of CH1 and CH2 are same size.
i
I
i
;
Audio output
Rear panei
>
6
Waveform and connection diagram
V: 10mV/div
H: Smsec/div
AC mode
Vv: SmV/div
H: Smaec/div
DC mode
PLL OFFSET
(W435 Jumper wire)
Frequency counter
Prove | CLT TIT)
{ }
re)
W616 Jumper wire.
(10:1)
V: 20mV/div
H: 10msec/div
q
AC mode
Video level |
Probe
10400
(}-+to
4
Rear pane!
> 100% White
—» Sync tip
0.714Vp-p
25%
=
:
Oscillo range
V: 20mV/div, 10nS/div (trigger)
AC mode
Rear panel
Osclito range
V: 2OmVidiv, 10pS/div (irigger)
CH1: 20 MV/OW, 10uSvaw (trigger)
CH2: adjust unt! size of waveform
becomes same as CHI.
AC input
Noie1 : It is possible to terminate video output terminal with 75Q by connecting TV monitor.
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