I am having some difficulty with this circuit. The relay will not kick in unless I lift off one side of De9 on the Main Amp/Protection circuit board (output driver board X07-1020-00).
I have checked all the xistors, other diodes and resistors. Ce17 is new and tests OK, voltages at pin 6, 14 and 17 are as expected.
Note a couple of errors on the schematic: 1. Q2 collector is not powered from pin 8 on the PS board but from Vee (B-). Pins 18 and 19 are reversed.
The unit is in the newer series of amps, i.e., above s/n 410501. My inclination is to just leave it alone and take my chances but if anyone can help I would truly appreciate it.
Otherwise the amp works fine and can achieve full power into 8 ohm dummy loads.
The full schematic is available at: https://www.hifiengine.com/manual_library/kenwood/ka-7002.shtml
I have checked all the xistors, other diodes and resistors. Ce17 is new and tests OK, voltages at pin 6, 14 and 17 are as expected.
Note a couple of errors on the schematic: 1. Q2 collector is not powered from pin 8 on the PS board but from Vee (B-). Pins 18 and 19 are reversed.
The unit is in the newer series of amps, i.e., above s/n 410501. My inclination is to just leave it alone and take my chances but if anyone can help I would truly appreciate it.
Otherwise the amp works fine and can achieve full power into 8 ohm dummy loads.
The full schematic is available at: https://www.hifiengine.com/manual_library/kenwood/ka-7002.shtml