Philips CDR Mozart Service Manual page 22

GB 22 5. CDR Mozart
Analog Audio Path During Playback
ANALOG AUDIO PATH DURING PLAYBACK
USE FREYA SERVO BOARD CIRCUIT DIAGRAM 2 AND 4 AND
MOZART MAIN BOARD CIRCUIT DIAGRAM 1 AND 3 AND BOTH BOTTOM- AND TOP VIEW: TEST POINTS
ANALOG AUDIO PLAYBACK
INSERT AUDIO SIGNALS DISC
START TRACK 15(1KHz 0dB)
ON TESTPOINT HF2 ?
(FREYA DIAGRAM 4)
(FREYA DIAGRAM 4)
ON TESTPOINTS
(MOZART DIAGRAM 3)
AoutL AND AoutR
ON TESTPOINTS
(MOZART DIAGR. 5)
ANALOG AUDIO PLAYBACK
Trouble Shooting
HF-SIGNAL
NO
YES
BCLK
WCLK
0.5uS/DIV
DATA0
I2S-SIGNALS
ON TESTPOINTS
NO
A3, A4, A5 ?
YES
I2S-SIGNALS
A27, A28 ,A29 ?
YES
NO
A6 AND A7 ?
YES
OK
-
CHECK CAHF-SIGNAL ON
TESTPOINT HF1 FOR ACTIVITY
-
CHECK TR 7103, 7102, 7105,
7109, 7361 AND IC 7360
A3 A4 A5 A27
2,1168MHz
44,1KHz
LEFT CHANNEL
MSB
-
CHECK IC 7018
-
CHECK POWER SUPPLY D3V3
-
CHECK SYS CLK ON
TESTPOINT R14 (= 8,4672 MHz)
- CHECK CONNECTION FROM CDR
FREYA BOARD CONN. 1000 TO CONN.1201
ON CDR MOZART MAIN BOARD
-
CHECK IC 7000
-
CHECK IC 7311
-
CHECK IC 7300
-
CHECK KILL TR 7303, 7304, 7309,
7310
A6
A7
ch1: pkpk= 5.95 V
ch1
ch1: freq= 1.00kHz
1
CH1 2.00 V~ MTB 500us ch1+
HF2
eyepattern
2.5V
0,5us/DIV
>800mVpp
A28 A29
32
RIGHT CHANNEL
LSB MSB
CL 16532046_008.eps
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