SERVICE MANUAL
Sony Corporation
Audio&Video Business Group
Published by Sony Techno Create Corporation
General
Output:
Audio outputs terminal (front/rear)
Subwoofer output terminal (mono)
Power antenna (aerial) relay control terminal
Power amplifi er control terminal
Inputs:
Remote controller input terminal
Antenna (aerial) input terminal
Telephone ATT control terminal
Illumination control terminal
BUS control input terminal
BUS audio input terminal
AUX input jack (stereo mini jack)
USB signal input terminal
WX-GT77UI/GT78UI/
GT78UIM
FM/AM 2DIN COMPACT DISC PLAYER
9-889-412-01
2009A04-1
©
2009.01
US Model
WX-GT77UI
E Model
WX-GT78UI
Indian Model
WX-GT77UI/GT78UIM
Saudi Arabia Model
WX-GT77UI
Ver. 1.0 2009.01
SPECIFICATIONS
CD Player section
Signal-to-noise ratio: 120 dB
Frequency response: 10 – 20,000 Hz
Wow and fl utter: Below measurable limit
Tuner section
FM
Tuning range:
Except US model:
87.5 – 108.0 MHz
US model:
87.5 – 107.9 MHz
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 US model:
531 – 1,602 kHz
US model:
530 – 1,710 kHz
Antenna (aerial) terminal:
External antenna (aerial) connector
Intermediate frequency: 25 kHz
Sensitivity: 26 μV
USB Player section
Interface: USB (Full-speed)
Maximum current: 500mA
Power amplifi er section
Outputs: Speaker outputs (sure seal connectors)
Speaker impedance: 4 – 8 ohms
Maximum power output: 52 W × 4 (at 4 ohms)
Model Name Using Similar Mechanism CDX-M60UI/MR60UI
CD Drive Mechanism Type MG-101Z-188//Q
Optical Pick-up Name DAX-25A
• The tuner and CD sections have no adjustments.
AUDIO POWER SPECIFICATIONS
(US model)
CEA2006 Standard
Power Output: 17 Watts RMS × 4 at
4 Ohms <1 % THD + N
SN Ratio: 82 dBA
(reference: 1 Watt into 4 Ohms)
Photo: WX-GT78UI
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