Kicker ZR240

m4ick · 18th July 2011, 05:19 PM

I replaced 2 TIP35Cs in one channel and used 75344Gs in the power supply. When I power it on now the relays engage and then disengage and it is stuck in protect.

The channel opposite the one I replaced outputs in is getting hot quickly. There are no shorted TIP35/36Cs and the TIP42/41Cs are not shorted. Not sure what to check next.

Perry Babin · 18th July 2011, 07:28 PM

What is the DC voltage on the emitter resistors for both channels when it goes into protect. Place the black meter probe on the secondary center tap or one of the non-bridging speaker terminals.

m4ick · 18th July 2011, 10:09 PM

I get +13v on one channel and +12.9 on the other, black probe on secondary center tap, red probe on output side of emitter resistors.

m4ick · 18th July 2011, 10:10 PM

Also, I have not touched the bias controls.

m4ick · 18th July 2011, 10:19 PM

I get +13v on one channel and +12.9 on the other, black probe on secondary center tap, red probe on output side of emitter resistors.

Perry Babin · 19th July 2011, 12:31 AM

Do you read 0 ohms between the RCA shields and the secondary center tap (no RCAs plugged in)?

m4ick · 19th July 2011, 12:40 AM

yes

m4ick · 19th July 2011, 01:10 AM

Also, the sec. center tap trace was burned from the crossover card to where the non-bridging speaker terminals meet and to the 2 film caps All of that has been redone.

Perry Babin · 19th July 2011, 01:50 AM

If you bypass the crossover card, do you still have DC?

Do you have both positive and negative regulated 15v?

m4ick · 19th July 2011, 11:54 AM

The crossover card is bypassed and it is generating + and - 15v. ~+13v DC is still present at the emitter resistors.

18th July 2011, 05:19 PM	#1
m4ick diyAudio Member Join Date: Jan 2010 Location: Gainesville, FL	Kicker ZR240 I replaced 2 TIP35Cs in one channel and used 75344Gs in the power supply. When I power it on now the relays engage and then disengage and it is stuck in protect. The channel opposite the one I replaced outputs in is getting hot quickly. There are no shorted TIP35/36Cs and the TIP42/41Cs are not shorted. Not sure what to check next. __________________ Scope - DMM - 460W Computer PSU - Tutorial

18th July 2011, 07:28 PM	#2
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	What is the DC voltage on the emitter resistors for both channels when it goes into protect. Place the black meter probe on the secondary center tap or one of the non-bridging speaker terminals. __________________ Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links

18th July 2011, 10:09 PM	#3
m4ick diyAudio Member Join Date: Jan 2010 Location: Gainesville, FL	I get +13v on one channel and +12.9 on the other, black probe on secondary center tap, red probe on output side of emitter resistors. __________________ Scope - DMM - 460W Computer PSU - Tutorial

18th July 2011, 10:10 PM	#4
m4ick diyAudio Member Join Date: Jan 2010 Location: Gainesville, FL	Also, I have not touched the bias controls. __________________ Scope - DMM - 460W Computer PSU - Tutorial

18th July 2011, 10:19 PM	#5
m4ick diyAudio Member Join Date: Jan 2010 Location: Gainesville, FL	I get +13v on one channel and +12.9 on the other, black probe on secondary center tap, red probe on output side of emitter resistors. __________________ Scope - DMM - 460W Computer PSU - Tutorial


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19th July 2011, 12:31 AM	#6
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Do you read 0 ohms between the RCA shields and the secondary center tap (no RCAs plugged in)? __________________ Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links

19th July 2011, 12:40 AM	#7
m4ick diyAudio Member Join Date: Jan 2010 Location: Gainesville, FL	yes __________________ Scope - DMM - 460W Computer PSU - Tutorial

19th July 2011, 01:10 AM	#8
m4ick diyAudio Member Join Date: Jan 2010 Location: Gainesville, FL	Also, the sec. center tap trace was burned from the crossover card to where the non-bridging speaker terminals meet and to the 2 film caps All of that has been redone. __________________ Scope - DMM - 460W Computer PSU - Tutorial

19th July 2011, 01:50 AM	#9
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	If you bypass the crossover card, do you still have DC? Do you have both positive and negative regulated 15v? __________________ Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links

19th July 2011, 11:54 AM	#10
m4ick diyAudio Member Join Date: Jan 2010 Location: Gainesville, FL	The crossover card is bypassed and it is generating + and - 15v. ~+13v DC is still present at the emitter resistors. __________________ Scope - DMM - 460W Computer PSU - Tutorial

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