Hi I have a 1998 Kicker ZR1000 on the bench. Has a protection problem of sorts. With the 7815 in circuit I am getting high current. With the output leg (3rd) removed my relays come on and low current draw. Can't seem to find anything shorted or open.
After pulling the 3rd leg and checking voltage, the regulator seems to be putting out 15v as it should be. The TIP29 and 7815 are getting hot also.
Checked voltage across the emitter resistors, .001 on all of them.
Anyone with any ideas what I am missing?
After further testing and probing I have found that the TL431c (U11) is getting hot. Would this be the same chip in Mouser as the TL431cd, cdr, cdrg4 etc... they are all 8 pin SOIC package?
After pulling the 3rd leg and checking voltage, the regulator seems to be putting out 15v as it should be. The TIP29 and 7815 are getting hot also.
Checked voltage across the emitter resistors, .001 on all of them.
Anyone with any ideas what I am missing?
After further testing and probing I have found that the TL431c (U11) is getting hot. Would this be the same chip in Mouser as the TL431cd, cdr, cdrg4 etc... they are all 8 pin SOIC package?
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What do you call high current?
Did you measure the 0.001v with the regulator in the circuit?
Did you try lowering the bias with the regulator in the circuit?
Did you measure the 0.001v with the regulator in the circuit?
Did you try lowering the bias with the regulator in the circuit?
High current is not really all that high, it is at 2.5 amps at idle, with reg in circuit, out of circuit it is under 1v.
I did check the resistors with reg in circuit. No voltage across them and they are all reading .3 ohms.
The bias pots are turned all the way down.
Unit is in protection.
I did check the resistors with reg in circuit. No voltage across them and they are all reading .3 ohms.
The bias pots are turned all the way down.
Unit is in protection.
Does twisting the transfor make a difference (the ones that are not stabilized with silicone short windings).
Is there any DC on the speaker terminals?
What's the resistance between the RCA shields and the secondary ground with nothing plugged into the RCAs?
Is there any DC on the speaker terminals?
What's the resistance between the RCA shields and the secondary ground with nothing plugged into the RCAs?
Twisting makes no different.
No DC on speaker terminals.
Reading .02 ohms from sec grd to RCA shields
No DC on speaker terminals.
Reading .02 ohms from sec grd to RCA shields
Perry I pulled R63, powered up the amp, protection didn't come on and relays engaged. However U11 is still getting hot.
Are both channels producing audio?
Do the bias controls work?
Is the voltage on the terminal of the TL431 that connects to the 1k resistor about 11.5v?
What's the voltage across the 1k resistor?
How hot is hot? Is it nearly melting the solder?
Do the bias controls work?
Is the voltage on the terminal of the TL431 that connects to the 1k resistor about 11.5v?
What's the voltage across the 1k resistor?
How hot is hot? Is it nearly melting the solder?
Both channels will produce audio, very faint audio.
Both bias controls work, if I turn them cw the current increases.
With ref to pin 8 it is 9v. Ref to sec grd it is 11.7v.
Across the 1k resistor is 3.2v.
Hot is 200+ deg F. Reading with a scanner. I used freeze spray also, melts almost immediately.
Both bias controls work, if I turn them cw the current increases.
With ref to pin 8 it is 9v. Ref to sec grd it is 11.7v.
Across the 1k resistor is 3.2v.
Hot is 200+ deg F. Reading with a scanner. I used freeze spray also, melts almost immediately.
The voltages are right so I don't think replacing it will help but I don't think it should be running so hot.
Neither do I. Looks like only pins 1 and 8 have the only traces to/from them.
I guess now I have to find out why it is going into protect with the R63 (680 ohm) in circuit and not in protect with it out of circuit.
I guess now I have to find out why it is going into protect with the R63 (680 ohm) in circuit and not in protect with it out of circuit.
You have the diagram in the kicker folder.
There are 3 traces to the anode, cathode and the reference terminals.
There are 3 traces to the anode, cathode and the reference terminals.