Panasonic SA-AK88 Service Manual page 14

Circuit diagram
Audio signal
output
IC701
SERVO
Sub-code
Q data
19
IC401
LCD
SYS CONT.
CD-DA/ VCD(AUDIO)
DATA SIGNAL LINE WAVEFORMS
A IC702 44 ARF signal
PLAY X:0.5 s
Y:0.023Vx10
IC1000 67 Video signal output
D
(blue back screen)
H signal(PLAY, X:10 s, Y:0.1Vx10)
63.5 s
V signal(PLAY, X:5 s, Y:0.1Vx10)
16.7 s
X701
16.9344MHz
59 58 78
E
L ch
73
E
R ch 75
IC702
A
DSP
8
44
15
VCD(VIDEO)
Note: Use the PVCD-K06 video CD test disc (menu playback feature is available on version
2.0). For color bar display, play back the 1st track when the menu playback feature is
used, or the 3rd track when the feature is not used.
IC1000
B
0.8V
(color bar screen)
H signal(PLAY, X:10 s, Y:0.1Vx10)
0.6V
V signal(PLAY, X:10 s, Y:0.1Vx10)
0.6V
CN1000
C
17
A
16
80
1
23
26
64
B
3
24
D
2
Video signal output
CD-DA/ VCD
Clock line
(AUDIO&VIDEO)
4 CD serial data input
T=0.354 s(F=2.822MHz)
PLAY X:0.2 s
Y:0.2Vx10
63.5 s
8 s 8 s
8 s 8 s
8 s 8 s
16.7 s
110
111 106
IC1000
MPEG
b
VIDEO
AUDIO
3
DECODER
6
4
67
110
IC1000 Audio serial data output
C
T=0.48 s(F=2MHz)
3.2V
PLAY X:0.2 s
IC702 73
E
T=1 s(F=1kHz)
1.2V
Test disc played at 1kHz, 0dB
(1st track SZZP1056C)
PLAY X:1 s
Y:0.1Vx10
1.2V
a
IC1003
5
INVERTER
X1000
27MHz
6.2V
Y:0.2Vx10
, 75 Audio signal output
2.4V