During Recording - Philips CDR Mozart Service Manual

Digital Audio Path During Recording
DIGITAL AUDIO PATH DURING RECORDING
USE FREYA SERVO BOARD CIRCUIT DIAGRAM 3 AND 4 AND
MOZART MAIN BOARD CIRCUIT DIAGRAM 1 AND 3 AND BOTH BOTTOM- AND TOP VIEW: TEST POINTS
DIGITAL AUDIO PATH

DURING RECORDING

CONNECT DIGITAL INPUT FROM
EXTERNAL SOURCE AND
SELECT THE DIGITAL RECORDING
INPUT BY PRESSING SOURCE
CHECK DIGITAL SIGNAL
ON TESTPOINT A25
(MOZART DIAGRAM 3)
YES
CHECK I 2 S - SIGNALS
ON TESTPOINTS A3, A4 AND A26
(MOZART DIAGRAM 3)
YES
CHECK I 2 S - SIGNALS
ON TESTPOINTS A3, A4 AND A26
(FREYA DIAGRAM 4)
YES
CHECK EFMDATA AND
EFMCLOCK ON TESTPOINTS
A17 AND A18
(FREYA DIAGR. 4)
YES
CHECK ACTIVITY
ON TESTPOINT A19
(FREYA DIAGRAM 3)
YES
DIGITAL AUDIO PATH
DURING RECORDING
OK
Trouble Shooting
A25
ch1: pkpk= 1.30 V
ch1
ch1: freq= 1.85MHz
1
CH1 1.00 V~ MTB 500ns
-
CHECK CONNECTION
NO
BETWEEN INTERFACE-BOARD AND
MOZART MAIN BOARD
A3 A4 A26
2,1168MHz
BCLK
44,1KHz
LEFT CHANNEL
WCLK
0.5uS/DIV
MSB
DATA1
-
CHECK POWER SUPPLY IC 7000
NO
-
CHECK IC 7000
-
CHECK CONNECTION FROM CDR
NO
FREYA BOARD CONN. 1000 TO CONN.1201
ON CDR MOZART MAIN BOARD
-
CHECK POWER SUPPLY IC 7018
NO
-
CHECK I2C - SIGNAL OF IC 7018
-
CHECK IC 7018
-
CHECK POWER SUPPLY IC 7007
NO
-
CHECK I2C - SIGNAL OF IC 7007
- CHECK IC 7007
CDR Mozart
ch1+
32
RIGHT CHANNEL
LSB MSB
A17
A18
5. GB 21
CL06532018_011.eps
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