SONY STRDB780
Manual de Servicio

STR-DA1ES/DB780 SECTION 4 TEST MODE
TUNER FACTORY PRESET MODE
All preset contents are reset to the default setting. Procedure: 1. While pressing the [DIMMER] and [SET UP] buttons, press the I/1 button to turn on the main power. 2. The message �FACTORY� appears and the present contents are reset to the default values.

SOFTWARE VERSION MODE
When this mode is used, the destination and the software version number are displayed. Procedure: 1. While pressing the [ENTER] and [AUTO DEC.] buttons, press the I/1 button to turn on the main power. 2. The destination and the software version number appear.

TUNER AM STEP CHANGE (9 kHz/10 kHz) MODE (Except STR-DB780: AEP and UK models)
Either the 9 kHz step or 10 kHz step can be selected for the AM channel step. Procedure: 1. While pressing the [PRESET TUNING +] or [TUNING +] button, press the I/1 button to turn on the main power. 2. Either the message �9 k STEP� or �10 k STEP� appears. Select the desired step.

KEY CHECK MODE
When this mode is used, the destination and the software version number are displayed. Procedure: 1. While pressing the [FM/AM] and [CINEMA STUDIO EX C] buttons, press the I/1 button to turn on the main power. 2. The message �REST 30� appears. 3. Every pressing of any button other than the I/1 button counts down the buttons. The buttons which are already counted once are not counted again. 4. When all buttons are pressed, the message �REST 00� appears.

TUNER AUTOBETICAL TUNING MODE (STR-DB780: AEP and UK models)
Procedure: 1. While pressing the [MEMORY] button, press the I/1 button to turn on the main power. 2. The message �AUTO-BETICAL SELECT� appears and scans and stores all the FM and FM RDS stations in the broadcast area. 3. When done, the message �FINISH� appears.

SOUND FIELD CLEAR MODE
The preset sound field is cleared when this mode is activated. Use this mode before returning the product to clients upon completion of repair. Procedure: 1. While pressing the [MODE +] button, press the I/1 button to turn on the main power. 2. The message �SF. CLR.� appears and initialization is performed.

ALL CLEAR MODE
All preset contents are cleared when this mode is activated. Use this mode before returning the product to clients upon completion of repair. Procedure: 1. While pressing the [AUTO DEC.] and [MODE +] buttons, press the I/1 button or press the I/1 button for more than five seconds to turn on the main power. 2. The message �MEMORY CLEARED !� appears and the memories are reset to the default values.

FLUORESCENT INDICATOR TUBE PATTERN CHECK MODE
All fluorescent segments are tested. When this test is activated, all segments turn on at the same time, then each segment turns on one after another. Procedure: 1. While pressing the [DISPLAY] and [ENTER] buttons, press the I/1 button to turn on the main power. 2. All segments and all LEDs turn on. 3. Turn the [FUNCTION] dial. 4. Half of segments and [Digital Cinema Sound], [AUTO DEC.], [MODE] LEDs turn on. 5. Turn the [FUNCTION] dial once again. 6. Others half of segments and [2CH ST], [INPUT MODE], [MULTI CH DIRECT] LEDs turn on. 7. Turn the [FUNCTION] dial once again. 8. All segments and all LEDs turn off.

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