Measuring point 89:
QI/
7.2.4.1 Check of subcarrier .
Player switched off.
Connect frequency counter to testpoint 83
,(
Pin 6 IC
7609 ) and turn on the player.
The frequency on testpoint
83
should be;
PAL=
4 433 6
18
Hz
.±
50 H
z.
NTSC = 3 579 545 H
z.
± 7 Hz.
The amplitude
on
testpoint 83 should be in between;
400 mV and 1000
mVpp
If for PAL the frequency of this signal deviates, perform
alignment of trimmer 2650.
7.2.4.2 Check of standard control signal SW
The control signal SW on testpoint 78, should be low
( 0 V ) for PAL and high (5
V)
for NTSC.
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 and 88.
....
'
.u..J
Ll
"I
R
!!:i
.-
""
-I
..
....
....
.... . ,
..
"'
G
I~
[ :
I .
.
B
"
·
Li.ii
.I
.
.
r=::
...
.
;;;;;;;;
.. ..
=
....
''
'!
•·
I.
-
c::
==
-=
-·
~
'
Check of Output signals for CVBS - Y / C
;(
CVBS signals Testpoint 89
Video signal 1000 mVpp
White level 710 mVpp
sync 290 mVpp
Burst 290 mV
pp
Y IC Sign. Testpoint
91
/92
Video signal 1000 mV
pp
White level 710
mVp
p
sync 290
mVp
p
Chroma 300 mVpp
PCS 67 666
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