ICF-C703
AM/FM Dream Machine Clock Radio with Digital Synthesized Tuner
v v v DIGITAL SYNTHESIZED AM/FM TUNER 5 STATION MEMORY PRESETS FORWARD/REVERSE TIME/ALARM SETTING DUAL ALARM SNOOZE BAR BRIGHTNESS CONTROL BACKLIT GREEN LCD DISPLAY SELF-POWER BACK-UP SYSTEM FUTURISTIC COMPACT DESIGN STEP-UP FEATURE NEW FEATURE

features

DIGITAL SYNTHESIZED AM/FM TUNER provides the most accurate

specifications

TUNER FREQUENCY RANGE: AM: 530-1710kHz
drift-free tuning of AM and FM radio stations
5 RANDOM STATION MEMORY PRESETS provides convenient

FM: 87.5-108MHz

ANTENNA SYSTEM: AM: Built-In Ferrite Bar Antenna

FM: AC Cord Antenna

SPEAKER: 2 14" (57mm) POWER OUTPUT: 100mW POWER REQUIREMENTS: AC 120V, 60Hz COLOR: Two-Tone Grey/Silver DIMENSIONS (WHD): 5" x 3 58" x 5 38" (128 x 93 x 137 mm) WEIGHT: 14 oz (400g)
2002 Sony Electronics Inc. Reproduction in whole or in part without written permission is prohibited. All rights reserved. Sony and Dream Machine are trademarks of Sony. Features and specifications are subject to change without notice. Non-metric weights and measures are approximate.
one-button tuning to your choice of AM or FM radio stations
DUAL ALARM SYSTEM permits two separate wake-up settings, an
especially useful feature for working couples
SNOOZE BAR shuts off alarm temporarily, to allow a few extra minutes
for sleep before it turns on again
BACKLIT GREEN LCD DISPLAY is highly visible and easily readable even

in darkness

BRIGHTNESS CONTROL lets you adjust the display brightness to suit
your preference during day or night time
CONVENIENTLY LOCATED CONTROLS are easy to reach, easy to adjust,

even from bed

v SELF-POWER BACK-UP requires no battery to maintain time settings in
event of blackout or other power failure
v FUTURISTIC COMPACT DESIGN is attractive and takes up little space on

desk or table top

ANTENNAS include built-in ferrite bar antenna for AM, convenient AC

cord antenna for FM

Sony Electronics Inc 1 Sony Drive, Park Ridge, New Jersey 07656 www.sony.com

Printed in USA 2/2002

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