Re: Thermaltake TR2 Bronze 600w low 12v voltage
Heat may have been what caused the damage in the first place. It was running very warm for a while and now it can't handle 75% load or more stable. 50% load is okay. I suspect damages to the voltage regulation components and will start testing there. Looking at the back of the board no physical damages so far.
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AresROC
Member
Last Activity: 12-09-2021, 10:59 AM
Joined: 10-07-2017
Location: LV
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Thermaltake TR2 Bronze 600w low 12v voltage
Last edited by AresROC; 12-02-2021, 03:03 PM. -
Re: Infinity PS-12 Powered Subwoofer Fired Amplifier
The clipping noise returned... looking to replace the TIP-31C 15v power regulator transistor now... the fun never ends on this one!Leave a comment:
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Re: Infinity PS-12 Powered Subwoofer Fired Amplifier
Yes, the power supply is an issue. The newer PS210 is rated 150w RMS, 210w "Average RMS", 300w "Marketing RMS" and 500w Peak dynamic, very generous ratings indeed with the same power supply as the PS-10/PS-12. PS210 have 2SK3594 MOSFETs instead of IRF640.
Attaching an external Class D Amp with this PS-12's power supply is just the last resort.
I also have a Behringer A500 Class A/B sitting around doing nothing... might be worth a try to see if the amp is a limiting factor to my dual...Leave a comment:
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Re: Infinity PS-12 Powered Subwoofer Fired Amplifier
Wow, got it pretty much figured out finally!
Replaced Q2 & Q3. Clean bass all day long! See my fixes here: [url]http://zenlog.wordpress.com/2017/11/02/infinity-jbl-subwoofer-repair-ps-12/[/url]
One lingering issue remains. My right sub turns on to standby mode. Left sub turns on to ON mode right away. The service manual actually doesn't say which mode it should turn on to. Not a big issue...
Very tempting to upgrade this Amp from 150 watt to 250/500 watt
Re: Infinity...
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Re: Infinity PS-12 Powered Subwoofer Fired Amplifier
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Re: Infinity PS-12 Powered Subwoofer Fired Amplifier
Seeing most badly damaged caps are 16 volt parts (36~150 ohm ESR, 10%+ vloss), I did replace them with 105c high temp caps when possible.
Took off the C72,C73 output filtering BP caps and tested them. 0.4 ESR & 2.3% vloss, still serviceable I think but I replaced them anyway because my new caps are 0 ESR and 1% vloss.
[URL=http://s1112.photobucket.com/user/AresROC/media/Infinity%20PS-12/C72C73%20SpkrOut_zpszbxbqov3.png.html][/URL]
This amp design doesn't seem to have a resistor...Last edited by AresROC; 10-26-2017, 10:23 AM.Leave a comment:
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Re: Infinity PS-12 Powered Subwoofer Fired Amplifier
^^^^^This. Took most caps off except the output filtering 4.7/6.8 uF 100v bi-polar caps and measured them with a tester.
Most are high ESR and many are just very dead. Gonna upgrade most from 16v to 25v Caps if I have them.
Planning on leaving the 4.7/6.8 uF 100v filtering caps as is (C72, C73). Will map out a sound pressure map with my Radio Shack SPL meter. If they are off I might replace them too... Turning out to be a big project x(.
More excitement to come......Leave a comment:
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Re: Infinity PS-12 Powered Subwoofer Fired Amplifier
My PS-12 has a revision "D" board, which is a design between the PS-12 service manual and the PS210 Sub. From there I compared the design changes and found a few interesting tidbits.
C65, a capacitor near the IR2111 IC was 470uF/16v, it has been changed to 47uF/16v.
C39, C75 was listed as 33uF 16v parts. But in the schematics they were 22uF 25v parts.
I am hoping to "upgrade" some of the parts. C2 is a part that caused the Sub not to turn on from Standby, and it...Leave a comment:
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Re: Infinity PS-12 Powered Subwoofer Fired Amplifier
I will go ahead and replace some other caps.
[url]http://www.avsforum.com/forum/113-subwoofers-bass-transducers/1098486-can-anybody-infinity-ps-10-multimeter-get-couple-values-me.html[/url]
From the above thread, it appears the screeching sound others and mine are producing when first powered on is produced by the crossover caps.
I found them on parts express and will be replacing them, unless someone can tell me the film caps would be a better replacement:
[url]https://www.parts-express.com/68uf-100v-electrolytic-non-polarized-crossover-capacitor--027-336[/url]...Leave a comment:
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Re: Infinity PS-12 Powered Subwoofer Fired Amplifier
Love the information here! I was able to repair one of my two PS-12 with the information provided!
I bought a pair of PS-12 in 2006. It's now 10 years and I found out both of them are somewhat dead... x(
The left "L" Sub is 6 month newer than the right "R" Sub by manufacture date, and uses Su'scon 85 degree c main caps. One of them has failed, with a bulged top. The older "R" Sub uses Samxon 105 degree c main caps and they are Ok after I replaced the standby...Leave a comment:
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Re: Infinity PS-12 Powered Subwoofer Fired Amplifier
Since C37 is timing calculated with the value of R121, I found the following info that might be helpful:
Version A - C37 220uF x R121/2.2M = 484
Version B - C37 47 uF x R121/ 10M = 470
I would replace the C37 caps with a value similar to your version....Leave a comment:
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