SONY MHCGX555
Manual de Servicio

HCD-GX355/GX555/RG270/RG475/RG575 SECTION 4 TEST MODE
MC COLD RESET
The cold reset clears all data including preset data stored in the RAM to initial conditions. Execute this mode when returning the set to the customer. Procedure: 1. Press three buttons of x , [ILLUMINATION] and [DISC 1] simultane-ously. 2. The message �COLD RESET� is displayed on the fluorescent indicator tube momentarily, then becomes standby states.

AMP TEST MODE
This mode is used to display the parameter of amplifier IC and display the VACS status. Procedure: 1. Press the I/1 button to turn the power on. 2. Press three buttons of x , [ILLUMINATION] and [PRESET EQ] simultaneously. 3. When the AMP test mode is activated, the message �AMP TEST IN� is displayed on the fluorescent indicator tube momentarily, then amplifier adjustment mode is displayed on the fluorescent indicator tube. 4. Press the [DISPLAY] button to changed over between VACS status display mode and the amplifier IC parameter display mode. 5. In this mode, press the [GROOVE] button to changed over DBFB on/off, and �DBFB ON� or �DBFB OFF� is displayed on the fluorescent indicator tube. 6. In this mode, press the [SURROUND] button to changed over surround on/off, and �SURROUND ON� or �SURROUND OFF� is displayed on the fluorescent indicator tube. 7. In this mode, press the [EQ BAND] button to enter the equalizer adjustment mode. In the equalizer adjustment mode, press the [EQ BAND] button to change over the adjustment band as LOW/MID/HIGH. And turn the [l --- EQ + L] knob to adjust the equalizer level of each bands. 8. To release the amplifier IC parameter display mode or equalizer adjustment mode, press the I/1 button to the power off.

AM TUNING INTERVAL CHANGE-OVER (Except AEP, UK, East European, Russian models)
A step of AM tuning interval can be changed over between 9 kHz and 10 kHz. Procedure: 1. Press the I/1 button to turn the power on. 2. Press the [TUNER/BAND] button to select �AM�. 3. Press the I/1 button to turn the power off. 4. Press two buttons of [PLAY MODE/TUNING MODE] and I/1 simultaneously. 5. The message �AM 9K STEP� or �AM 10K STEP� is displayed on the fluorescent indicator tube, and thus the channel step is changed over.

CD SHIP (LOCK) MODE
This mode moves the optical pick-up to the position durable to vibration. Use this mode when returning the set to the customer after repair. Procedure: 1. Press the I/1 button to turn the power on. 2. Press the [CD] button to select �CD�. 3. Press two buttons of [CD] and [POWER] simultaneously. 4. The message �LOCK� is displayed on the fluorescent indicator tube, and the CD ship mode is set.

CD SHIP (LOCK) MODE & COLD RESET
This mode is used to perform CD chip (lock) mode and cold reset simultaneously. Procedure: 1. Press the I/1 button to turn the power on. 2. Press the [CD] button to select �CD�. 3. Press three buttons of x , [CD] and [DISPLAY] simultaneously. 4. The message �COLD RESET� is displayed on the fluorescent indicator tube momentarily, then becomes standby states.

CD TRAY LOCK MODE
This mode is used to unable to take sample disc out of tray in the shop. Procedure: 1. Press the I/1 button to turn the power on. 2. Press the [CD] button to select �CD�. 3. Load a disc and press two buttons of x and Z for 5 seconds. 4. The message �LOCKED� is displayed on the fluorescent indicator tube and the CD tray is locked. (Even if pressing the Z button, the message �LOCKED� is displayed on the fluorescent indicator tube and the CD tray is locked) 5. To release this mode, press two buttons of x and Z for 5 seconds. 6. The message �UNLOCKED� is displayed on the fluorescent indicator tube and the CD tray is unlocked.

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