Sony - genesis

HCD-GNX60/GNX70/ GX9900

SERVICE MANUAL
Ver.1.0 2005. 03

US Model
HCD-GX9900

E Model Australian Model
HCD-GNX60/GNX70

• HCD-GNX60/GNX70/GX9900 are the Amplifier, CD player, tape deck and tuner section in MHC-GNX60/GNX70/GX9900.

Photo : HCD-GNX70

Model Name Using Similar Mechanism CD Section CD Mechanism Type Base Unit Name Optical Pick-up Name TAPE Section Model Name UsingSimilar Mechanism Tape Transport Mechanism Type

HCD-GN880 CDM74-F1BD81 BU-F1BD81A KSM-215DCP/C2NP NEW CMAT5Z2

SPECIFICATIONS
AUDIO POWER SPECIFICATION (MHC-GX9900 USA model only) POWER OUTPUT AND TOTAL HARMONIC DISTORTION: With 6-ohm loads, both channels driven, from 120 Hz – 10 kHz; rates 230 watts per channel minimum RMS power, with no more than 10% total harmonic distortion from 250miliwatts to rated output. Amplifier section MHC-GX9900 Total harmonic distortion Less than 0.1% (6 ohms at 1 kHz, 100 W) MHC-GNX70 The following are measured at Mexican model: AC 127 V, 60 Hz Other models: AC 120, 220, 240 V, 60 Hz DIN power output (rated) 170 + 170 watts (6 ohms at 1 kHz, DIN) Continuous RMS power output (reference) 220 + 220 watts (6 ohms at 1 kHz, 10% THD) MHC-GNX60 The following aremeasured at Mexican model: AC 127 V, 60 Hz Brazil model: AC 127 V or 220 V, 60 Hz Other models: AC 120, 220, 240 V, 50/60 Hz DIN power output (rated) 150 + 150 watts (6 ohms at 1 kHz, DIN) Continuous RMS power output (reference) 200 + 200 watts (6 ohms at 1 kHz,10% THD) Inputs VIDEO/MD (AUDIO) IN (phono jacks): voltage 250/450 mV, impedance 47 kiloohms TV (AUDIO) IN (phono jack): voltage 250 mV,impedance 47 kiloohms MIC (phone jack): sensitivity 1 mV, impedance 10 kiloohms Outputs PHONES (stereo mini jack): accepts headphones of 8 ohms or more FRONT SPEAKER: Use only the supplied speaker • SS-GNX100 (MHC-GNX70/GX9900) • SS-GNX60 (MHC-GNX60) SURROUND SPEAKER: Use only the supplied speaker • SS-RSX80 (MHC-GNX70/GX9900) Disc player section System Laser Laser Output

Frequency responseWave length Signal-to-noise ratio Dynamic range

Compact disc and digital audio system Semiconductor laser (l=780 nm) Emission duration: continuous Max. 44.6 mW* *This output is the value measured at a distance of 200 mm from the objective lens surface on the Optical Pick-up Block with 7 mm aperture. 2 Hz – 20 kHz (±0.5 dB) 780 – 790 nm More than 90 dB More than 90 dB

OPTICAL CD DIGITAL OUT(Square optical connector jack, rear panel) (For MHC-GNX60/GNX70) Wave length 660 nm Output Level –18 dBm – Continued on next page –

MiNi Hi-Fi COMPONENT SYSTEM

9-879-532-01
2005C0279-1 © 2005.03

Sony Corporation
Audio Group Published by Sony Engineering Corporation

HCD-GNX60/GNX70/GX9900
Tape deck section Recording system Frequency response 4-track 2-channel stereo 50 – 13,000 Hz (±3dB), using Sony TYPE I tape

Tuner section FM stereo, FM/AM superheterodyne tuner FM tuner section Tuning range 87.5 – 108.0 MHz Antenna FM lead antenna Antenna terminals 75 ohm unbalanced Intermediate frequency 10.7 MHz AM tuner section Tuning range North and Latin American models: 530 – 1,710 kHz (with the interval set at 10 kHz) 531 – 1,710 kHz (with the interval set at 9 kHz) Other models:531 – 1,602 kHz (with the interval set at 9 kHz) 530 – 1,710 kHz (with the interval set at 10 kHz) Antenna AM loop antenna Antenna terminals External antenna terminal Intermediate frequency 450 kHz General Power requirements North American model: Australian model: Argentina model: Other models: Power consumption MHC-GX9900 MHC-GNX70 MHC-GNX60 Dimensions (w/h/d) (Approx.) Mass (Approx.) HCD-GNX70HCD-GX9900 HCD-GNX60

SAFETY CHECK-OUT After correcting the original service problem, perform the following safety checks before releasing the set to the customer: Check the antenna terminals, metal trim, “metallized” knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below.

LEAKAGE
The AC leakage from any exposed metal part to earth ground and from...