Mtx 1501d

catfishermike · 16th May 2010, 04:38 AM

Does anyone have a part number for the 1k resistor between D199 and D198 diodes.I just spent 2 hours searching mouser and my brain is fried.Any help would be appreciated,thanks.
Perry thank you for the info on the diode.

Perry Babin · 16th May 2010, 05:22 AM

660-RK73H3ATTE1001F should be the same diode.

Don't reinstall R198 (striped end directly connected to RCA jacks). If the amp loses ground with that diode in the circuit, it will burn the RCAs or the RCA shield on the head unit.

catfishermike · 16th May 2010, 05:28 AM

Thanks Perry.So just leave that diode out?
The resistor reads 970 ohms should i replace that or is that close enough.

Perry Babin · 16th May 2010, 07:09 AM

Leave the diode out. They were not installed on later versions.

That's close enough but if you have to order parts, you should order and replace the resistor.

catfishermike · 16th May 2010, 07:12 AM

Thank you Perry.

catfishermike · 16th May 2010, 12:40 PM

Perry,I got it all put back together installed in truck.The left side rca input is not working.I can put the L rca cable in the R input and i have sound.But if I try the R or L rca cable in the L input on the amp,no sound.So it's some thing in the amp.
Would you have any suggestions on what to look for?The sound is super loud so I'm kind of confused.Thanks Perry.

Perry Babin · 16th May 2010, 07:28 PM

Can you move the RCA connector around when it's plugged into the left jack to make the audio play through?

If not, you'd need to follow the signal from the RCA jack through the circuit to see where it's lost. There isn't much between the two points.

catfishermike · 16th May 2010, 08:03 PM

I wiggled it around and didnt get anything.I'll trace it down and see where it goes.I appreciate the help Perry.

catfishermike · 19th May 2010, 12:24 PM

Perry the input has a tiny resistor,board designation R102,am I right in assuming that it is 20k ohms?I could be wrong my dmm has been acting funny.

Perry Babin · 19th May 2010, 05:45 PM

I don't have a good photo of that area on the 1501 but on the 81000 (which is very similar), it's a 2k resistor (marked 2001). It's inside the frame of the RCA jack marked J148.

16th May 2010, 04:38 AM	#1
catfishermike diyAudio Member Join Date: Apr 2010	Mtx 1501d Does anyone have a part number for the 1k resistor between D199 and D198 diodes.I just spent 2 hours searching mouser and my brain is fried.Any help would be appreciated,thanks. Perry thank you for the info on the diode.

16th May 2010, 05:22 AM	#2
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	660-RK73H3ATTE1001F should be the same diode. Don't reinstall R198 (striped end directly connected to RCA jacks). If the amp loses ground with that diode in the circuit, it will burn the RCAs or the RCA shield on the head unit. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

16th May 2010, 07:09 AM	#4
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Leave the diode out. They were not installed on later versions. That's close enough but if you have to order parts, you should order and replace the resistor. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

16th May 2010, 07:28 PM	#7
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Can you move the RCA connector around when it's plugged into the left jack to make the audio play through? If not, you'd need to follow the signal from the RCA jack through the circuit to see where it's lost. There isn't much between the two points. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

19th May 2010, 05:45 PM	#10
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	I don't have a good photo of that area on the 1501 but on the 81000 (which is very similar), it's a 2k resistor (marked 2001). It's inside the frame of the RCA jack marked J148. __________________ 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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16th May 2010, 05:28 AM	#3
catfishermike diyAudio Member Join Date: Apr 2010	Thanks Perry.So just leave that diode out? The resistor reads 970 ohms should i replace that or is that close enough.

16th May 2010, 07:12 AM	#5
catfishermike diyAudio Member Join Date: Apr 2010	Thank you Perry.

16th May 2010, 12:40 PM	#6
catfishermike diyAudio Member Join Date: Apr 2010	Perry,I got it all put back together installed in truck.The left side rca input is not working.I can put the L rca cable in the R input and i have sound.But if I try the R or L rca cable in the L input on the amp,no sound.So it's some thing in the amp. Would you have any suggestions on what to look for?The sound is super loud so I'm kind of confused.Thanks Perry.

16th May 2010, 08:03 PM	#8
catfishermike diyAudio Member Join Date: Apr 2010	I wiggled it around and didnt get anything.I'll trace it down and see where it goes.I appreciate the help Perry.

19th May 2010, 12:24 PM	#9
catfishermike diyAudio Member Join Date: Apr 2010	Perry the input has a tiny resistor,board designation R102,am I right in assuming that it is 20k ohms?I could be wrong my dmm has been acting funny.

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