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There are currently no product reviews.
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everything was fine - fast, readable, worth the price
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I'm happy to get a manual from this rare old amp. The pdf is from good qualty.
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very quick service and manual as described - would happily trade here again!
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Fast Download,all pages present,an excellent copy.THis enabled to find the origional part numbers and chase them up. The cartridge is proving difficult to find but at least I know the origional part number.Thanks to all.
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The manual was as described. Complete with parts list and technical information. Fast delivery.
� IPM drive circuit The inverter driving device (IGBT) and the drive circuit are built in the IPM. The IPM receives the signal from the microcomputer and convert it to 0 � 15 V signal to drive the IGBT. When the unit operates at low speed, a chopper signal is emitted from the micro computer as shown in Fig. 4-6. (0 to 5 V) The signal is converted to 0 � 15 V at inside the IPM and transmitted to the gate of the transistor (IGBT) in each phase to drive the IGBT. When abnormal peak current was detected while the inverter is driving, the IPM outputs the Fail signal immediately from the pin (29) and forces the lower arm transistor to shut off at the same time. In this step, the Q501 is turned on and the input signal of the upper arm is also shut off through the D501 and D502, so that all signals to the IGBT are shut off. This signal is also distributed to microcomputer (17 pin) as a Lo signal to stop the drive signal and blink the self diagnosis lamp as two time. When the peak current is detected, the IPM keeps the lower arm off for about 4mS and the drive signal into stand-by state. 3 minutes after this state, the micro computer outputs the drive signal and restarts the operation.
(D) Drive signal at point (C)
Fig. 4-6
� 72 �
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