rf t1000

timwebb · 02:49 AM

i got this for repair. q216 is shorted across the first and third leg. im having a little trouble finding the data sheet.

Perry Babin · 24th December 2011, 04:06 AM

PZTA56

timwebb · 24th December 2011, 11:21 PM

ok i have a short on u7 on the tabs of the board. i also removed the output and power supply transistors. its still in protect.

Perry Babin · 25th December 2011, 01:02 AM

What are 'tabs of the board'?

timwebb · 25th December 2011, 01:17 AM

oh the first two legs of u7 are shorted on the board.is it like that by design?

Perry Babin · 25th December 2011, 01:22 AM

You should read ~120 ohms between legs 1 and 2 of U7.

timwebb · 25th December 2011, 03:08 AM

ok i read 120 ohms. i cant get it to come out of protection.

Perry Babin · 25th December 2011, 03:58 AM

Is the protect LED lit brightly or dimly?

timwebb · 25th December 2011, 04:38 AM

its very dim.

Perry Babin · 25th December 2011, 04:45 AM

That's fairly common for amps of this type. It's probably not in protect. When it's in protect, the LED is almost blindingly bright if you look straight into it.

24th December 2011, 04:06 AM	#2
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	PZTA56 __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

25th December 2011, 01:02 AM	#4
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	What are 'tabs of the board'? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

25th December 2011, 01:22 AM	#6
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	You should read ~120 ohms between legs 1 and 2 of U7. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

25th December 2011, 03:58 AM	#8
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Is the protect LED lit brightly or dimly? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

25th December 2011, 04:45 AM	#10
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	That's fairly common for amps of this type. It's probably not in protect. When it's in protect, the LED is almost blindingly bright if you look straight into it. __________________ 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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24th December 2011, 11:21 PM	#3
timwebb diyAudio Member Join Date: Jan 2010 Location: memphis tn	ok i have a short on u7 on the tabs of the board. i also removed the output and power supply transistors. its still in protect.

25th December 2011, 01:17 AM	#5
timwebb diyAudio Member Join Date: Jan 2010 Location: memphis tn	oh the first two legs of u7 are shorted on the board.is it like that by design?

25th December 2011, 03:08 AM	#7
timwebb diyAudio Member Join Date: Jan 2010 Location: memphis tn	ok i read 120 ohms. i cant get it to come out of protection.

25th December 2011, 04:38 AM	#9
timwebb diyAudio Member Join Date: Jan 2010 Location: memphis tn	its very dim.

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