Kenwood KAC1023 Remote turn on fault

sst12 · 20th September 2010, 01:31 AM

Hi All

Got chance tonite to strip down Kenwood KAC1023 bought with fault, not blowing fuses but refusing to power up when connecting remote turn on, found on main board Q57 C945 Q108C Blown, R125. 4.3K resistor fried, Diode D27 Blue band with number 512 on it short, RCA Input pcb R51 2K resistor fried, Diode D9 short. so the path from remote terminal to q57 in between amp smoothing caps has signs of overheating tracks as well as above faults, with respect to earth must have a high voltage on remote turn on to cause that damage, possible speaker lead flash do you think.

Can anybody help with component identification/ subsituition as i am struggling to find a circuit of this cool old school amp, any help would be well apreciated

SST12

Perry Babin · 20th September 2010, 01:48 PM

You'll need to obtain a copy of the service manual.

sst12 · 25th September 2010, 02:20 AM

Hi Perry

I managed to get hold of a service manual and have replaced all damaged components, checked over the rest of the amp set up and serviced, running ok.

This amp has a nice freq response and is seriously loud, well chuffed

20th September 2010, 01:31 AM	#1
sst12 diyAudio Member Join Date: Sep 2010	Kenwood KAC1023 Remote turn on fault Hi All Got chance tonite to strip down Kenwood KAC1023 bought with fault, not blowing fuses but refusing to power up when connecting remote turn on, found on main board Q57 C945 Q108C Blown, R125. 4.3K resistor fried, Diode D27 Blue band with number 512 on it short, RCA Input pcb R51 2K resistor fried, Diode D9 short. so the path from remote terminal to q57 in between amp smoothing caps has signs of overheating tracks as well as above faults, with respect to earth must have a high voltage on remote turn on to cause that damage, possible speaker lead flash do you think. Can anybody help with component identification/ subsituition as i am struggling to find a circuit of this cool old school amp, any help would be well apreciated SST12

20th September 2010, 01:48 PM	#2
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	You'll need to obtain a copy of the service manual. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

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25th September 2010, 02:20 AM	#3
sst12 diyAudio Member Join Date: Sep 2010	Hi Perry I managed to get hold of a service manual and have replaced all damaged components, checked over the rest of the amp set up and serviced, running ok. This amp has a nice freq response and is seriously loud, well chuffed

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