# Power Plant Premier has high distortion and fans not working **URL:** \ **Category:** Power Components\ **Created:** [December 1, 2020, 8:56am UTC](https://forum.psaudio.com/t/power-plant-premier-has-high-distortion-and-fans-not-working/20369 "2020-12-01T08:56:35Z")\ **Posts on this page:** 20\ **Page:** 2
**Author:** ![andy-stoneman](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/andy-stoneman/32/145800_2.png) [@andy-stoneman](https://forum.psaudio.com/u/andy-stoneman)\ **Post date:** [May 25, 2022, 2:25pm UTC](https://forum.psaudio.com/t/power-plant-premier-has-high-distortion-and-fans-not-working/20369/21 "2022-05-25T14:25:24Z")
Hi Dirk, We tried the wired-in Cap with a 220uF (only one on hand), same problem I’m afraid - the death click! There appears to be 55v across the Cap Input THD is fairly stable at 2.4-2.5 with the output swinging from 2.6-3.4 Any other ideas please? Thanks again Andy ---
**Author:** ![Dirk67](https://avatars.discourse-cdn.com/v4/letter/d/e9a140/32.png) [@Dirk67](https://forum.psaudio.com/u/Dirk67)\ **Post date:** [May 26, 2022, 7:14am UTC](https://forum.psaudio.com/t/power-plant-premier-has-high-distortion-and-fans-not-working/20369/22 "2022-05-26T07:14:26Z")
Hi Andy. 55 Volt at C5 sounds fairly high. I only have an excerpt of the schematics. There are no AC voltages mentioned before the rectifier diodes D5/6 in the drawing, as you see can below. But you can measure TP12. If there are 5 Volts, then U6 is working properly and you do have a different issue with your Premier. But you can also measure the other supply voltages: TP5 → -25 Volt TP4 → +25 Volt TP3 → -12 Volt TP2 → +12 Volt Let’s see what that values are… ![grafik](https://us1.discourse-cdn.com/flex015/uploads/psaudio/original/3X/1/1/11e9593911f6857b4a707dfdde0cd154ec077e53.png) ---
**Author:** ![andy-stoneman](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/andy-stoneman/32/145800_2.png) [@andy-stoneman](https://forum.psaudio.com/u/andy-stoneman)\ **Post date:** [June 7, 2022, 2:00pm UTC](https://forum.psaudio.com/t/power-plant-premier-has-high-distortion-and-fans-not-working/20369/23 "2022-06-07T14:00:31Z")
Many thanks Dirk, sorry for the delay in response, I’ve been away I’ll fire it up and see what I find… ---
**Author:** ![axl](https://avatars.discourse-cdn.com/v4/letter/a/e8c25b/32.png) [@axl](https://forum.psaudio.com/u/axl)\ **Post date:** [March 13, 2023, 7:51pm UTC](https://forum.psaudio.com/t/power-plant-premier-has-high-distortion-and-fans-not-working/20369/24 "2023-03-13T19:51:49Z")
Hello friends! I have got Premier for repair today, but there is no schematics in SM. Can anybody help me to get schematics? thank you from Ukraine, good friends! ---
**Author:** ![Elk](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/elk/32/1240_2.png) [@Elk](https://forum.psaudio.com/u/Elk)\ **Post date:** [March 13, 2023, 8:17pm UTC](https://forum.psaudio.com/t/power-plant-premier-has-high-distortion-and-fans-not-working/20369/25 "2023-03-13T20:17:41Z")
Welcome @axl ! ---
**Author:** ![axl](https://avatars.discourse-cdn.com/v4/letter/a/e8c25b/32.png) [@axl](https://forum.psaudio.com/u/axl)\ **Post date:** [March 16, 2023, 3:01pm UTC](https://forum.psaudio.com/t/power-plant-premier-has-high-distortion-and-fans-not-working/20369/26 "2023-03-16T15:01:58Z")
Hi, James Will you help me with that helpful docs? I have PP Premier to repair but no schematics in service manual. I am electronics engineer from Ukraine. Thank You friend. ---
**Author:** ![jamesh](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/jamesh/32/3871_2.png) [@jamesh](https://forum.psaudio.com/u/jamesh)\ **Post date:** [March 16, 2023, 6:20pm UTC](https://forum.psaudio.com/t/power-plant-premier-has-high-distortion-and-fans-not-working/20369/27 "2023-03-16T18:20:50Z")
No problem, I’ll send over a zip folder with all of the documents we have. Should be helpful for you! ---
**Author:** ![Palouse](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/palouse/32/93521_2.png) [@Palouse](https://forum.psaudio.com/u/Palouse)\ **Post date:** [March 16, 2023, 6:22pm UTC](https://forum.psaudio.com/t/power-plant-premier-has-high-distortion-and-fans-not-working/20369/28 "2023-03-16T18:22:11Z")
And you stay safe out there! ---
**Author:** ![Roly](https://avatars.discourse-cdn.com/v4/letter/r/7c8e57/32.png) [@Roly](https://forum.psaudio.com/u/Roly)\ **Post date:** [July 15, 2023, 4:06pm UTC](https://forum.psaudio.com/t/power-plant-premier-has-high-distortion-and-fans-not-working/20369/29 "2023-07-15T16:06:57Z")
Hola James I am an electronic engineer please send me if you can some schematics or notes of a POWER PLANT PREMIER PP-PREM-GR-BLK SN:PPP-B0-10B0421 Im in Spain and Service all récord consoles and profesional audio Thanks in advance Roly Ortega ---
**Author:** ![Elk](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/elk/32/1240_2.png) [@Elk](https://forum.psaudio.com/u/Elk)\ **Post date:** [July 15, 2023, 4:09pm UTC](https://forum.psaudio.com/t/power-plant-premier-has-high-distortion-and-fans-not-working/20369/30 "2023-07-15T16:09:46Z")
Good luck with the repair, Roly. ---
**Author:** ![Roly](https://avatars.discourse-cdn.com/v4/letter/r/7c8e57/32.png) [@Roly](https://forum.psaudio.com/u/Roly)\ **Post date:** [July 15, 2023, 4:50pm UTC](https://forum.psaudio.com/t/power-plant-premier-has-high-distortion-and-fans-not-working/20369/31 "2023-07-15T16:50:53Z")
Thanks friend sorry about my poor english I found two ceramic 5 watts resistors blowed The output transistors are fine When replaced the .12 ohms resistors the display works At the time i pressed the ‘MODE’ switch The diferencial switch of my workbench go out Please help me if you can Thanks in advance ---
**Author:** ![weedeewop](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/weedeewop/32/190064_2.png) [@weedeewop](https://forum.psaudio.com/u/weedeewop)\ **Post date:** [July 15, 2023, 5:37pm UTC](https://forum.psaudio.com/t/power-plant-premier-has-high-distortion-and-fans-not-working/20369/32 "2023-07-15T17:37:57Z")
> [@Roly](#): > > I found two ceramic 5 watts resistors blowed Ouch! Roly welcome to the forum and good luck getting your unit up and running. ---
**Author:** ![Roly](https://avatars.discourse-cdn.com/v4/letter/r/7c8e57/32.png) [@Roly](https://forum.psaudio.com/u/Roly)\ **Post date:** [July 15, 2023, 9:01pm UTC](https://forum.psaudio.com/t/power-plant-premier-has-high-distortion-and-fans-not-working/20369/33 "2023-07-15T21:01:08Z")
Hi all I have just repared the unit The problem was the 47uF capacitor and the two big 4.7uF x 350 vca Both old capacitors were very bad in capacitance but worst in ESR I have replaced both with new ones and the famous 47uF after the 78L05 (i think its too little for the application) Good news All works fine Thanks for all Tomorrow i will reassemble the unit Ir works fine with a 1 of POWER factor ( Thats really impressed me Jajaja ) and with the little potentiometer change the output Sorry if its not a good description I do my best yo share Thanks to all brothers ---
**Author:** ![Elk](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/elk/32/1240_2.png) [@Elk](https://forum.psaudio.com/u/Elk)\ **Post date:** [July 15, 2023, 9:28pm UTC](https://forum.psaudio.com/t/power-plant-premier-has-high-distortion-and-fans-not-working/20369/34 "2023-07-15T21:28:42Z")
Excellent news! Well done ---
**Author:** ![davida](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/davida/32/94292_2.png) [@davida](https://forum.psaudio.com/u/davida)\ **Post date:** [July 15, 2023, 11:06pm UTC](https://forum.psaudio.com/t/power-plant-premier-has-high-distortion-and-fans-not-working/20369/35 "2023-07-15T23:06:32Z")
So it lives to fight another bunch of days!!! 👏 👏 👏 Way to go Best wishes ---
**Author:** ![Roly](https://avatars.discourse-cdn.com/v4/letter/r/7c8e57/32.png) [@Roly](https://forum.psaudio.com/u/Roly)\ **Post date:** [July 16, 2023, 11:31am UTC](https://forum.psaudio.com/t/power-plant-premier-has-high-distortion-and-fans-not-working/20369/36 "2023-07-16T11:31:55Z")
Hi all When i reassembled the problem returns ---
**Author:** ![Roly](https://avatars.discourse-cdn.com/v4/letter/r/7c8e57/32.png) [@Roly](https://forum.psaudio.com/u/Roly)\ **Post date:** [July 16, 2023, 8:55pm UTC](https://forum.psaudio.com/t/power-plant-premier-has-high-distortion-and-fans-not-working/20369/37 "2023-07-16T20:55:48Z")
Hi friends After 8 hours of hard work finally found the problem In my 48 years of electrónics never seen that The unit works fine but many times goes out making the workbench differential switch goes out The first think was (as i found later) a ground fault The POWER brigde rectifier goes to ground (chasis transistor heatsinks) but not as a shortcircuit The TB356 35A 600v bridge goes aleatory (sorry my poor english) to ground At first i dude about all capacitors But was the bridge I hope this will be helpful for someone Changed r40 and the 47uF and the two 5 watts.12 resistors Thats all Many Thanks ---
**Author:** ![Elk](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/elk/32/1240_2.png) [@Elk](https://forum.psaudio.com/u/Elk)\ **Post date:** [July 16, 2023, 9:59pm UTC](https://forum.psaudio.com/t/power-plant-premier-has-high-distortion-and-fans-not-working/20369/38 "2023-07-16T21:59:59Z")
Thank you for the follow up. This may help others. 🙂 ---
**Author:** ![davida](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/davida/32/94292_2.png) [@davida](https://forum.psaudio.com/u/davida)\ **Post date:** [July 16, 2023, 11:46pm UTC](https://forum.psaudio.com/t/power-plant-premier-has-high-distortion-and-fans-not-working/20369/39 "2023-07-16T23:46:11Z")
So Roly your Power Pkant is back up and running again? Best wishes ---
**Author:** ![Anton1981](https://avatars.discourse-cdn.com/v4/letter/a/91b2a8/32.png) [@Anton1981](https://forum.psaudio.com/u/Anton1981)\ **Post date:** [December 6, 2023, 6:25am UTC](https://forum.psaudio.com/t/power-plant-premier-has-high-distortion-and-fans-not-working/20369/40 "2023-12-06T06:25:47Z")
Does anyone have an schematic for this device. I got it with strange “improvements” and dead NPN power transistors. I need to fix it. Thx. ![изображение](https://us1.discourse-cdn.com/flex015/uploads/psaudio/original/3X/a/3/a3a0a406ee82eee5e45add16ed98040522e08617.jpeg) ![изображение](https://us1.discourse-cdn.com/flex015/uploads/psaudio/original/3X/e/e/ee224b722359fa21217acbf522316b0f0f284171.jpeg) [Previous page](https://forum.psaudio.com/t/power-plant-premier-has-high-distortion-and-fans-not-working/20369.md?page=1) [Next page](https://forum.psaudio.com/t/power-plant-premier-has-high-distortion-and-fans-not-working/20369.md?page=3)