Pioneer WD Series, Руководство по обслуживанию

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2) As the high-current circuit is close to the light-current circuit, take care on the measuring
position and safety problems during repair.
3) As there is large electrolytic capacitor on the outdoor power source board, plentiful residual
electrons shall be discharged for a period of time after the power supply is cut off. In this
case, please wait patiently until the capacitor is fully discharged before proceeding to further
operation. Full discharge may take approx. 30 seconds. You may also connect a load (e.g.
electric iron) between DC- and DC+ for manual discharge. After thorough discharge, use the
multimeter RX10K to measure. The pointer shall point to “0” position and then slowly return
to “ ∞ ”. If not, the electrolytic capacitor is damaged.
4) Make sure to have some understanding to the circuit before carrying out repair. Most
fundamentally, the operator must know the composition of the circuits, position of each part
and the possible function.
5) It is an extremely unscientific repair method for starting the measurement immediately after
getting the circuit board, or directly energizing it to start the test. This will probably cause
secondary damage to the repair board.
6) The indoor and outdoor wires must be kept in correct order. If not, it might cause failure and
damage to the electric controller. When removing the screws, take protective measures to
prevent the screws or other objects from falling down onto the circuit board or into the
electric control box. If any, be sure to eliminate them on time.