Stumped on RF Punch 100 DSM amp - help
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 17th June 2011, 12:16 AM #71 m109ner diyAudio Member   Join Date: May 2011 Mistake...Gains are set counterclockwise (low).
 17th June 2011, 12:58 AM #72 m109ner diyAudio Member   Join Date: May 2011 With Gains full clockwise (Max): both RCA channels = 1.7VAC #12 = 1.7V AC #17 =9.54V AC #18 = 8.32V AC #8 = 1.7V AC
 18th June 2011, 12:18 PM #73 m109ner diyAudio Member   Join Date: May 2011 I woud really appreciate/welcome anyone's assistance. thank you kindly
 18th June 2011, 06:36 PM #74 Perry Babin   diyAudio Member   Join Date: Nov 2003 Location: Louisiana Post the DC voltage on all 3 legs of Q101 and the DC voltage measured directly across R103. __________________ Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links
 18th June 2011, 10:38 PM #75 m109ner diyAudio Member   Join Date: May 2011 All readings in DC Voltage with amp powered up with no audio source. *R103 = -15.10, -14.85 *Q101 2 legs on same side = -15.10 and -14.85 1 leg by itself =-15.09
 18th June 2011, 11:48 PM #76 Perry Babin   diyAudio Member   Join Date: Nov 2003 Location: Louisiana Measure the AC voltage across the speaker terminals for both channels. Measure the AC voltage with one probe on pin 1 of the audio driver board and the other probe on pin 2 of the audio driver board. These are the boards near the output transistors. Post the voltage for each driver board. __________________ Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links
 19th June 2011, 01:31 AM #77 m109ner diyAudio Member   Join Date: May 2011 with and w/o audio measurements in AC voltage: Speaker terminals R Channel +=3.5mV - =starts at 3.5mV and goes all over the place Left Channel +=3.5mV - =3.5mV both audio driver boards R Channel +=3.5mV - =starts at 3.5mV and goes all over the place Left Channel +=3.5mV - =3.5mV Getting static out of right channel speaker for the first time.
 19th June 2011, 01:41 AM #78 Perry Babin   diyAudio Member   Join Date: Nov 2003 Location: Louisiana With the black meter probe on the main ground terminal, post the AC voltage on both terminals or C102 and C103. It's likely that these capacitors are defective (along with all of the 10uF SMD caps in the amp). Do this with the 1v input signal. __________________ Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links

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