3-261-651-04(2)
TV(1-12ch)/FM/AM PLL TV(1-3ch) FM/AM PLL

ICF-R553V/R550V ICF-R350

2003 Sony Corporation
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Ni-Cd Ni-MH Li-ion

1

R03 *1 *3 1

*1 ICF-R553V *2 ICF-R550V/R350 *3
ICF-R550V/R350 BCA-TRG2KIT

DC IN AC

DC IN DC IN 6V

4 NH-AAA

JEITA*1 TV*10 FM AM 62 12

*1 JEITA

*2 ICF-R350 TV 1 3

TV FM TV FM

3 AC 100V 3
4 JEITA*1 TV*JEITA*1 TV*2 43
(LR03) FM (R03) FM 24 5.5 AM 56 7.5 AM 105 20

v 10cm 1

28 TV FM AM 3 3

TV FM AM

*1 ICF-R350

1 NHK FM

1 FM 9kHz TV 1 0.1MHz AM

2011 7

AM PM AM12:00

PM12:00

AM 12:00
ICF-R553V TRG2KIT AC AC AC BCA-

JEITA AC

AC JBRC http://www.jbrc.net/ hp/contents/index.html

2 FM 3 FM

40C 0C 1 28

0C 4 19

TV 1-12 *1*3 1ch FM MHz 0.1 MHz TV 1-3ch *2*3 AM 531 1,710 kHz 9 kHz 2.8 cm 1
91 12.3 mm ) ( 58.3 91.7 15.1 mm ) ( ) (JEITA*4) ( 74 g 71 g
3.5 mm mW (JEITA*4) DC 1.2 V DC 1.5 V 4 1
DC 6 V 73.2 29.8 57.5 mm ) (JEITA*4) ( 48 g
DC 6 V AC 100 V 50/60 Hz 41 mm ) ( ) (JEITA*4) ( 186 g BCA-TRG2KIT BCA-TRG2 AC 4
*1 ICF-R553V/R550V *2 ICF-R350 *3

*4 JEITA *5 ICF-R553V

*6 ICF-R553V

0 qa qs

9 qs qd qf 0

6 TV*1 FM AM

AM PM *1 ICF-R350

30 OFF

Printed in China

Modification of Sony ICF-SW 7600GR for DRM
This receiver (like the old model SW7600G) has a 2nd IF of 455kHz, so the SATSchneider crystal mixer can be used for downconverting the IF to 12 kHz. As there is not enough space inside the receiver, I put the mixer board, together with a 9V battery and a filter CFW455F in an extra case. I tapped the signal before it enters the IF filter on the board (CF201, see picture below) and connected it to the receivers line out jack (for listening to AM you can still use the earphone jack).
Pic 1: schematics showing CF201
Pic 2: showing CF201 on the PCB For the connection use a shielded wire and connect the shield to ground next to the signal. The other end of the wire can be connected to the line out after removing the capacitors C248 and C250.
Pic 3: showing the line out connection
In the extra box put the filter CFW 455F in font of the mixer board. All you would need for this is: 1 filter CFW 455F 1 crystal mixer board (both available from SAT-Service Schneider) a piece of coax cable and a 9V battery Its a simple modification but it has been working great, even with the telescopic antenna, on some transmissions I achieved up to 27 dB SNR and I especially like it for receiving DRM on medium wave with the built-in ferrite antenna. For the old model SW7600G it is nearly the same, except the point for tapping the IF is CF401 instead of CF201, and the capacitors that need to be removed are C 421 and C423.
If you are interested in the complete service manual of the SW7600GR as a pdf file or for further questions, send me an email to: stoeppler@yahoo.com
Simone Stoeppler stoeppler@yahoo.com www.stoepplernet.de/DRM/

Feb 2004