Kicker ZX360.2

[Dr Zeus]

This amp is not anything like the ZR360 on the DVD. This one is a red, single sided board, with only one set of TIP35/36 outputs per channel. The amp is stamp dated 2006.

I got this amp with a blown channel and blown power supply transistors. i replaced but TIP35/36 in the defective channel, as well as put a couple of new IRFZ44 in the power supply. The original Q212 (TIP35C) was dead shorted on all legs, while Q216 (TIP36C) was measuring 400ohms across across legs 1&2; both out of circuit.

When powered up, the ps draws and over heats. With the rects removed , the power supply runs just fine with no significant draw. The rectifiers are currently back in circuit.

Its channel 2 which was defective. If I remove the new TIP35/36 BJTs the amp will power without significant draw. I'm starting to go about measuring other failed components in the channel, from TIP41/42s to MPSA06/A56, and JE340G/350G driver circuits. I bench tested the TIP41/42 and JE340G/350G driver circuits which are measuring fine on the bench. Within circuit, the A06/A56 units are diode checking OK but I have not yet removed them for testing.

With the TIp35/36 out and everything else in place, the amp powers. On the defective channel referencing non-bridging terminals almost everything in the channel measures +-33vDC, whereas the good channel has many points measuring 0vDC.

[Perry Babin]

Post a photo of the inside of the amp.

[Dr Zeus]

Ive since tested all MPSA06/56 and all are OK out of circuit. I've tested all electrolitic caps in circuit - none are shorted.

[Perry Babin]

Did you check the bias transistor?

Did you check the bias transistor carefully?

[Dr Zeus]

If thats the MPSA06 between the outputs then its measuring OK off the board. i replaced it wil a new unit and still the same issue. i'm sorry if it is worth mentioning, that I had to replace R250 on account of the bad outputs transistors. now, with the outputs and MPSA06 out of circuit, R250 has ~20vDC across it and runs too hot to handle. By comparison, R150 of the other channel has ~1vDC.

[timwebb]

The issue I had with a few of these were the output drive transistors. Reading good but they were bad.

[Perry Babin]

Post a closeup photo of the components in the channel that failed. Take it at a slight angle so that the flash doesn't get reflected off of the board.