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Old 7th August 2009, 04:51 AM   #41
acd is offline acd  Philippines
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Join Date: Jul 2009
hi, gud morning, i'm planning to buy sventa ma 14 for my subs, do you ds s ok. pls help
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Old 7th August 2009, 07:45 AM   #42
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Join Date: Jun 2006
Default Phonic Powerpod 740 problems

Hi everyone,

I've managed to repair my 740 with the assistance of the contributor ( ShorBird ) who posted the repair kit details. He was able to mail me the schematics of a similar model.

In the end, I worked through the circuit and replaced everything that had blown - not just the bits in the kit...

I took all the transistors and diodes out and tested them separately - then I replaced the ones which tested OK to be sure...

I still have no idea what caused the problem - the circuit seems to be a reasonable design and has all the obvious protection in place, etc.

I had to replace the following parts:-

The pair of IGBT switchers
The four driver transistors
( 100Volt 1 watt TO-92 - 2 NPN & 2 PNP )
The four transistors in the PWM feedback loop
( 60 Volt 300mW TO-92 - 2 NPN & 2 PNP )
The 15 volt regulator on the startup supply ( 7815 )

Plus all the diodes in the kit

All the small transistors are hard to get, but if you look for the data sheets on the web, they aren't anything special.

I replaced them all with generic parts which I could buy easily

I confused myself by looking for DC on the output fuses before realising that they are in the AC lines from the transformer...

Total cost of the parts was about 10 and the unit is now 100% OK.
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Old 10th January 2010, 01:37 PM   #43
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Join Date: Feb 2009
Default Phonic Powerpod 740

Quote:
Originally Posted by zeonrider View Post
Yes I could, but it is 3,52 Mb large. Maybe I can sand you only schematic . Full service manual have 45 pages.

Regards zeoN_Rider
Hi
Please could I have a copy of the schematic?
Regards
Ian
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Old 27th June 2010, 01:09 PM   #44
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Join Date: Jun 2010
Hello there,

Could you send the parts "System Block Diagram" and "Digital Effect Schematic" of the Powerpod 740 Mixer Service Manual to wplco@lykamspam.pl? There is a problem with DSP and an electrician wants the schematics to repair it.

Regards, DJ TrueBeliever.
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Old 7th June 2013, 03:57 PM   #45
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Could anyone mail me the schematics (or preferably the complete service manual) too?
I was given the version with a switching power supply, som som copnent have already been removed, most likely because of short circuit problems.
Can anyone help?
regard ARie (neeby)
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Old 7th June 2013, 04:17 PM   #46
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Join Date: Feb 2011
Quote:
Originally Posted by grahamprie View Post
Hi,

I have a 740 with the SMPS blown - the IGBT's are both dead short.

Can anyone let me have a copy of the schematic before I fry the replacements?

Does anyone know what's in the 'official' repair kit?

Thanks, Graham.
Could you repair the amp and what is the most likely cause of the blown smps?
I have an similar problem
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