D2 Gr70/Gr120 Power Module - Harman Kardon DPR2005 Service Manual

PR1005/DPR2005
D
NOTE ON D2 POWER MODULE GR70 (DPR1005) AND GR120 (DPR2005)
Description of Normal LED Operation on the D2 Power Module:
If the speaker impedance is too low for the amplifier and the individual channel's output current
exceeds the safe operating point, the channel will shut down on current peaks and the LED will
flicker RED.
After a module reset, the LED will be RED until the controller is initialized. When the power
stages are enabled, the LED turns GREEN
If the amplifier reaches an unsafe operating temperature, the LED turns RED. After the amp
cools off, it will revert to GREEN
If a channel is shorted, the LED turns RED. The system will shut down the power supply if a
short is detected. In which case, there is a small flicker of RED and then off.
If the LED stays RED with the DPR ON and there is no speaker load, the D2 Power Module is
likely defective.
Product (Power Module)
GR70 (DPR1005)
GR120 (DPR2005)
Part Number
#D2-GR00707-111
#D2-GR01207-211
35
harman/kardon