Trouble Shooting
GB 20
CDR Mozart
5.
Digital Audio Path During Playback
DIGITAL AUDIO PLAYBACK
INSERT AUDIO SIGNALS DISC
START TRACK 15(1KHz 0dB)
HF-SIGNAL
ON TESTPOINT HF2 ?
NO
NO
YES
YES
YES
CHECK CAHF-SIGNAL ON
TESTPOINT HF1 FOR ACTIVITY
CHECK TR 7103, 7102, 7105,
7109, 7361 AND IC 7360
I2S-SIGNALS
ON TESTPOINTS
A3, A4, A5 ?
(FREYA DIAGRAM 4)
CHECK IC 7018
CHECK POWER SUPPLY D3V3
CHECK SYS CLK ON
TESTPOINT R14 (= 8,4672 MHz)
-
-
-
-
-
-
>800mVpp
eyepattern
2.5V
0,5us/DIV
MSB
MSB
LSB
0.5uS/DIV
32
WCLK
BCLK
DATA0
RIGHT CHANNEL
44,1KHz
2,1168MHz
LEFT CHANNEL
HF2
A3
A4
A5
(FREYA DIAGRAM 4)
DIGITAL SIGNAL
OUT OF CDR60 ON
TESTPOINT A24
(MOZART BOARD
DIAGR. 3)
CHECK CONNECTION FROM CDR
FREYA BOARD CONN. 1000 TO CONN.1201
ON CDR MOZART MAIN BOARD
-
-
CHECK IC 7000
CHECK TR 7011
NO
DIGITAL SIGNAL
EBU-OUT1 FROM MOZART
TESTPOINT A20
DIGITAL SIGNAL
EBU_DIG_OPT_OUT
TESTPOINT A2
(MOZART BOARD
DIAGR. 1)
(MOZART BOARD
DIAGR. 3)
NO
YES
DIGITAL AUDIO PLAYBACK
OK
-
CHECK R 3272
YES
NO
CL16532046_010.eps
101001
DIGITAL 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
ch1
ch1: pkpk= 1.30 V
ch1: freq= 1.85MHz
CH1 1.00 V~ MTB 500ns ch1+
1
A2
A20
A24