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Service Technical Information
MODEL NO.
CSD- MD5
SUBJECT
Sound Distortion
REF.No. :G - A0 - 033 - E0 DATE :30. AUG. 2000
Please take the following countermeasure when there is a complaint such as "the sound gets distorted", or "noise is reproduced", etc., when the sound volume control level is 20 or more (maximum 30). This occurs when a CD or an MD with a high recording level of the low frequency range is played back under the following conditions: T-BASS G-EQ VOLUME - - - MAX ROCK or JAZZ 20 or more
Connect a wire between the pins 10, 13 (GND) of the POWER IC (IC200: LA4663) and the GND terminal of the capacitor C109 (1000 µF/16V) in the main P.W.B.
P.W.B-MAIN
IC200 C107 470/25
R MUTE
SP1 R211 1K POW ER AM P IC200 LA4663
+
+
SP2 (SPEAKER )
+
C216 4 .7/50
R214 C 218 4 .7K 2200p R212 4 .7K R
R211
+ 1/50
R220 0
R216 1K
5 6
7
8
Vcc
SATND BY Vcc MUTE L-CH
+
R200 180 C 200 22 /50
MUTE
+ 14
GND
+
2 + + 3
13 12
GND POW ER IC R -CH R GND
+ 9 10 11
R201 180
C201 22/50
+
4
-
Add-Wire
IC101
C217 4 .7/50
+
R215 4 .7K
R213 4.7K C 219 2200p
C212 1 /50
1 +
C210 47 /25
+
Q100-103 REG . Q 100 2SB1375
D100 GBU4D L-6419 C101 0 .022
! F101 125V 2A S1 C100 0 .022
2
R104
1 3
C107 470/25
Q 101 DTA114YK R
S1 S2
+
C 103 0 .022 C102 0.022
+
Q 103 2SC 1815Y R103 680 R102 10K
S2 S4 S4 S3
C109 1000 /16
+
R Q102 DTC114YK
C104 6800/25
Add W ire
S3 CN101
MAIN P.W.B Pattern Surface Circuit diagram
Ref. - G - R -
Parts Code 87-610-063- 310 Code No. -
Description B0 -6- 3 Access Code - Modified Ser. No. -
Remarks - Parts Schedule -