I was very glad recieving the service manal from You. Manuals were delivered promptly and were correct as advertised. A complete and very usefull service manual with all details. Thank you!
Good product. All the information is invcluded, but due to the complexity of the amplifier, it still is difficult to get it to operation again.
Text excerpt from page 43 (click to view)
MODELS: LT-3280D/LT-3780D
4-2. Button switch is not effective.
Is the following harness connected correctly? � Between PWB-MAIN and PWBCONTROL (MC) YES NO When it pushes the button switch, is the signal below available at pins 2, 3, of MC ? 2, 3 : 3Vp-p only when switch is not pushed. Not 3V only when switch is pushed. (It depends on switch)
NO
Poor harness connection or defective cable.
Part on PWB-CONTROL is out of order.
YES IC700 (and peripheral circuits) are out of order.(PWB-MAIN)