Sony ICF-2001D - Service Notes and Modifications; IC Replacement Modifications

ICF-2001D/2010 |
NOTES ON SERVICE
The replacement IC CX7961 for IC4 and IC6 has come to supply-end, so IC CX7961A is available instead of CX7961.
When replacing IC4 and/or IC6, following modifications should be performed.
Former | New
Type No. CX7961 | CX7961A
Part No. 8-757-961-00 | 8-757-961-10
Modification
1) When replacing IC4, modify as follows.
*Cli2 1uF/16V > 0.056uF/50V: 1-136-162-00 (METALIZED FILM)
* R102 2.2kQ = > 15kQ: 1-249-431-11 (CARBON, SMALL)
+ RIS1 1.0k2 + 220: 1-249-409-11 (CARBON, SMALL)
* Add a 3.3uF/4V capacitor (C181) paralleled with R141.:
2) When replacing IC6, modify as follows.
1-135-103-00 (CRIP, TANTAL ELECT)
-C138 0.82NF/16V > 0.056uF/SOV: 1-136-162-00 (METALIZED FILM)
* R125 1.0kQ > 5.6kQ: 1-249-436-00 (CARBON, SMALL)
* R151 1.0kQ > 2200 : 1-247-815-00 (CARBON, SMALL)
+ Add a 3.3uF/4V capacitor (C181) paralleled with R141.: 1-135-103-00
— PARTS LOCATION —
[ MAIN BOARD ]
& era ;
Q38
OV <ov>(2.9¥) |
1.2V)
.25y) ¢\,35v) fi
D25 fo.v) rvs 4
= 5 3
KSINE 2.18Vp~p)
(0.1V).
OW) 9S
IN, SF, U,MS0V. eu
7 6 Om °
FS BY sien) PLATE CW
1) 1
$0,-Le
2.
.95V
S|
OV),
ThIvI
OW
2.507
-
SINE560mVp-p
e! 15OmVp-pSiGNAL
{SINE410mV p-p)
<2:95v7
(0V)
{55mvp-p
SIGNAL}
t 7 [ez] cool]
(3V RANGE) LIS «o.7Vv)
2.95V SINE 40mVo-0
POWER ANTI 7V
Sony Corporation
9-951-647-12
(including
9-951-647-91)
=
Bee
é 38 1SOKH2 ‘SINE T20mvo~p
<2 4v) ba caudal =SINES!OmVp~p
Gzv) (2.1)
CHIOMHE; SINE 640mVp-p,
orev (i3emHr® SINE 530mVp~p au
15¢
fe
HE
13€
English
88A0205-1(3)
Printed in Japan
© 1985. 3