8.3 Activating Self Diagnosis Function (Servicing Mode)

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This mode can be used during servicing.

1. Plug the AC adapter to the power source. Press and hold down the INPUT SELECTOR button and the PRESET button, and then press the POWER button.

2. The message, DISPLAY appears on the display for three seconds, and then disappears.

3. When the TUNING DOWN button is pressed, the current program filing number (ex. "M45_***" for MA123_45) appears. The *** digit indicates the ROM checksum used for ROM collection, and if theunit is not loaded with ROM, "NO" appears.

   When the TUNING UP button is pressed, the sub micro computer program filing number (ex. S90_***" for MA678_90) appears. The *** digit indicates the ROM checksum used for ROM collection, andif the unit is not loaded with ROM, "NO" appears.

4. When the MEMORY button on the remote controller, the function is switched to "Input Inspection Mode", which output analog input signals at L channel of VCR analog input to all channels.

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