Trouble Shooting
GB 22
CDR Mozart
5.
Analog Audio Path During Playback
ANALOG AUDIO PLAYBACK
INSERT AUDIO SIGNALS DISC
START TRACK 15(1KHz 0dB)
HF-SIGNAL
ON TESTPOINT HF2 ?
NO
NO
NO
YES
YES
YES
YES
CHECK CAHF-SIGNAL ON
TESTPOINT HF1 FOR ACTIVITY
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)
AoutL AND AoutR
ON TESTPOINTS
A6 AND A7 ?
CHECK IC 7311
CHECK IC 7300
CHECK KILL TR 7303, 7304, 7309,
7310
ANALOG AUDIO PLAYBACK
OK
-
-
-
-
-
-
-
-
-
-
>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
A27
A28
A29
(FREYA DIAGRAM 4)
(MOZART DIAGR. 5)
I2S-SIGNALS
ON TESTPOINTS
A27, A28 ,A29 ?
(MOZART DIAGRAM 3)
CHECK CONNECTION FROM CDR
FREYA BOARD CONN. 1000 TO CONN.1201
ON CDR MOZART MAIN BOARD
CHECK IC 7000
A6
A7
ch1
ch1: pkpk= 5.95 V
ch1: freq= 1.00kHz
CH1 2.00 V~ MTB 500us ch1+
1
CL 16532046_008.eps
101001
CHECK TR 7103, 7102, 7105,
7109, 7361 AND IC 7360
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