SERVICE MANUAL
Sony Corporation
Audio&Video Business Group
Published by Sony Techno Create Corporation
CDX-GT49UM/GT490U/
GT490US/GT494U
FM/AM COMPACT DISC PLAYER
9-889-625-02
2009K04-1
©
2009.11
E Model
CDX-GT490U/GT490US
Indian Model
CDX-GT49UM/GT494U
Ver. 1.1 2009.11
SPECIFICATIONS
Tuner section
FM
Tuning range:
Except Saudi Arabia model:
87.5 – 108.0 MHz (at 50 kHz step)
87.5 – 107.9 MHz (at 200 kHz step)
Saudi
Arabia
model:
87.5 – 108.0 MHz
FM tuning interval:
Except Saudi Arabia model:
50 kHz/200 kHz switchable
Antenna (aerial) terminal:
External antenna (aerial) connector
Intermediate frequency: 150 kHz
Usable sensitivity: 10 dBf
Selectivity: 75 dB at 400 kHz
Signal-to-noise ratio: 70 dB (mono)
Separation: 40 dB at 1 kHz
Frequency response: 20 – 15,000 Hz
AM
Tuning range:
Except Saudi Arabia model:
531 – 1,602 kHz (at 9 kHz step)
530 – 1,710 kHz (at 10 kHz step)
Saudi
Arabia
model:
531 – 1,602 kHz
AM tuning interval:
Except Saudi Arabia model:
9 kHz/10 kHz switchable
Antenna (aerial) terminal:
External antenna (aerial) connector
Intermediate frequency: 25 kHz
Sensitivity: 26
P
V
CD player section
Signal-to-noise ratio: 120 dB
Frequency response: 10 – 20,000 Hz
Wow and fl utter: Below measurable limit
USB Player section
Interface: USB (Full-speed)
Maximum current: 500 mA
Power amplifi er section
Outputs: Speaker outputs (sure seal connectors)
Speaker impedance: 4 – 8 ohms
Maximum power output: 52 W
u
4 (at 4 ohms)
General
Outputs:
Audio outputs terminal
(front, sub/rear switchable)
Power antenna (aerial) relay control terminal
Power
amplifi er control terminal
Inputs:
Remote controller input terminal
Antenna (aerial) input terminal
AUX input jack (stereo mini jack)
USB signal input terminal
Model Name Using Similar Mechanism
CDX-GT33U
CD Drive Mechanism Type
MG-101Y-188//Q
Optical Pick-up Name
DAX-25A
• The tuner and CD sections have no adjustments.
Tone controls:
Low: ±10 dB at 60 Hz (XPLOD)
Mid: ±10 dB at 1 kHz (XPLOD)
High: ±10 dB at 10 kHz (XPLOD)
Power requirements: 12 V DC car battery
(negative ground (earth))
Dimensions:
Approx. 178 × 50 × 179 mm
(7
1
/
8
× 2 × 7
1
/
8
in.) (w/h/d)
Mounting dimensions:
Approx. 182 × 53 × 162 mm
(7
1
/
4
× 2
1
/
8
× 6
1
/
2
in.) (w/h/d)
Mass: Approx. 1.2 kg (2 lb. 11 oz.)
Supplied accessories:
Card remote commander: RM-X151
Parts for installation and connections (1 set)
Design and specifi cations are subject to change
without notice.
Photo: CDX-GT490US
