Philips CDI 220/00 Service Manual page 39

7.2.4 Measurement & adjustments video encoder
unH 1003
Required test equipment.
Electronic voltmeter
Oscilloscope
Frequency counter
7.2.4.1 Check of PAL subcarrier .
- Player switched off.
- Connect frequency counter to testpoint 83, (Pin 6 IC
7601) and turn on the player.
- The frequency on testpoint 83 should be;
4 433 618 Hz.
±
50 Hz.
- The amplitude on testpoint 83 should be in between;
400 mV and 1000 mVpp
- If the frequency of this signal deviates, perform align-
ment of trimmer 2681.
Adjustment PAL sub carrier oscillator.
- Player switched off
- Standard switch NTSC/PAL (SK-2) in position 625, PAL.
- Connect frequency counter to testpoint 75 ,Pin 8 IC 7667
and turn on the player.
- Adjust with trimmer 2681, the frequency on testpoint 75
at 4 433 618 Hz.
±
50 Hz.
7.2.4.2 Check of standard control signal SW
The control signal SW on testpoint 78,(pin 1 of connector
E 1062) should be low ( 0 V ).If this signal deviates check
the connections to the CD panel print connector E1063
pin 1 and the connection from the CD panel to the MMC
panel.
7.2.4.3 Check of RGB input signals
On the given photo below the signals are given for R - G -
B.
On Testpoints 86 87 88. (points 1-2-3 of connector E1062)
R
G
B
PCS 61881
Check of Output signals for CVBS - Y / C.
0\/
PAL-CVBS signals Testpoint 89
Video signal 1000 mVl'P
White level 710 m~,,,
sync 290 m ""
Burst 290 mVI'"
PAL- Y /C Sign. Testpoint 91 /92
Video signal 1000 mV,,
1
,
White level 710 mV
1
" ,
sync 290 mVI',,
Chroma 300 mV
1 , 1 ,