Philips CDI 220/31 - Page 44

7.2.3.2 1
2
S signals
Check whether the signals, given below, appear on the test
points
57
- 58 - 59
Time base related o
nl
y to CD-DA.
~
LEH
SA
VPL[
...-
.,a RIGHT
$A
V.PLE
D
AAB
~E=~:J:f'l'JJJ.J1XIT
-
__
__j
ClAB
ff
L
UUlJl
Ji'
Jlf
JUUl.f
J1I'
JlJl1
l1flf
J
l!JlJUUlfJ
JI
II' 1
- 11
341,15
7.2.3.3 Xin clock signal
testpoint
61
Play a CD-DA track.
The frequency of the Xin signal must be:
11
,2896 MHz (CD-DA.)
Play CD
-I
audio.
The frequency of the X
in
signal must be:
9,767 MHz for CD-I level A and
CD
-I level B;
4,838 MHz for CD-I level C.
7.2.3.4 DEEMP signal
(testpoint 56 )
2 8224MH/
Insert test disc 5
or
5 A and during track 14 (recorderd
without pre-emphasis) the signal DEEMP should be low.
(0V
.)
During track 15 (recorded with pre-emphasis) this signal
DEEMP should
be
high(+
5V.)
7.2.3.5 KILL signal
(testpoint 54)
This KILL signal must
be
+ 12V during reset.
In
normal/play position this signal is - 8 V.
7.2.3.6 Performance check APU
Position digital audio
- Insert Audio signals test disc 1,
SBC
429
- Play track no. 1.
(1
kHz sinus signal L + R 0dB)
- The level on pin? and pin8 of IC7531 should be:
0.9 Vrms
±
2
dB
- The level on testpoint
71
and
72
shou
ld
be:
2 Vrms
±
3dB.
P
CS
67
66
5
7.2.4 Video section
Required test equipment.
- Electronic voltmeter
- Oscilloscope
- Frequency counter
Put the player in the service she
ll
on testimage (colorbar).
signals: BSW!, GSW!, RSW! At pos 7622, 7621 and 7620
Measuri
ng
point
86
, 87 and 88:
• •
1¥
[J
TI
,.,z
R
.~
. .
..
---
I
.
,......
G
•••
•
•
'
...
B
L.:__
J
c=
..
~
~
..
.
...
C:
~
-==
Measuring point
91
:
Measuring point 92:
'
.
.
...
..
...
.
.
..
I
I[
:
c
:::i
'
-
OV
C
-OV
y