Denon PMA-50, Service Manual

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3. Protection Check mode
3.1. Operation
･ Hold down buttons "SOURCE" and "Bluetooth" and press the power button to turn on the power.
･ Press the "SOURCE" button twice.
･
Version Display
Mode,
Display / LED check
Mode and
Protection History
Mode changes each time the button "Source" is
pressed.
3.2. The contents of the display
･ The protect LED is lits.
“ DETECT_ _ _ _ _ ”
“ PROTECTION_ ”
“ /_ _ _ _ _ _ _ _ _ _ ”
“ xxxxxxxxxxx ” ：Protection information
“ _ _ _ _ _ _ _ _ _ _ _ ”
xxxxxxxxxxx：Protection information
- NO_PROTECT_：No protections have occurred.
- THERMAL_ _ _ _：Abnormal temperature
- SP_PROTECT： Speaker short-circuit：Amplifier circuit is abnormal.
- DC_PRB/-B Power supply overvoltage
- DC_PRB/-B Power supply is short-circuit
3.3. Clearing the Protection History
Hold down buttons "Bluetooth" for at least 5 seconds while the protection history displayed.
Also run the Factory Initialization and the protection history is cleared.
4. Initialization for the factory mode
4.1. Operation
Hold down button "POWER" and connect the power cord to an outlet.
4.2. The contents of the display
" FACTORY RESET" is displayed for 3 seconds
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