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Joined: Nov 2009
Posts: 396 Likes: 2
Hitchhiker
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Hitchhiker
Joined: Nov 2009
Posts: 396 Likes: 2 |
I need to replace the PSU in my G68 and this would be a good time to go to the linear. I know this topic has been discussed in great detail. Yet, there seems to be little consensus. Or am I wrong and there is a go-to PSU?
DSP6000, DSP5200, DSP5500VC, P300W, SW1600, G68, 568.2, HD621, G57, G55, Oppo BDP-105.
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Joined: Nov 2009
Posts: 396 Likes: 2
Hitchhiker
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Hitchhiker
Joined: Nov 2009
Posts: 396 Likes: 2 |
No one wants to touch this? I found the following:
XP ECM40UT3 is the newer version
UMEC UPO653S-01 is the older version
But this is old info. Any updates?
DSP6000, DSP5200, DSP5500VC, P300W, SW1600, G68, 568.2, HD621, G57, G55, Oppo BDP-105.
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Joined: Dec 2004
Posts: 6,569 Likes: 13
President of the Imperial Galactic Government
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President of the Imperial Galactic Government
Joined: Dec 2004
Posts: 6,569 Likes: 13 |
You may want to contact Mark Koval directly for the latest advice you need. Chris 
No 18 in the Hall of fame I have simple tastes; I am content to settle for the best: GIK monster bass panels, rear wall. QNAP TVS 471i3. Roon into DSP5200SE via 210/ 218 zone... Explorer 2. Bluesound Pulse 2, Mini & Flex. 596v1, 518, Foxsat HD, Sony BDP, Pioneer 5090, 2 Chromecast's for LRB videos. MS200 to F80 for a Roon zone
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Joined: Jan 2006
Posts: 703 Likes: 13
Paranoid android
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Paranoid android
Joined: Jan 2006
Posts: 703 Likes: 13 |
There's quite a long thread on LPS replacement options - you might do better posting to the end of that.
Cheers, Ian
1: Roon on Mac Studio, G-Drive 10TB, 818v3, 7200.2, UHD722, LG 77G4
2. 808.6, 8kSE
3. 218, 3200's
4: Rivian R1T - 18 speaker 1200W Elevation by Meridian premium sound system
5. G68ADV (croaked), G98DH (also croaked), [HD621, Syles SL-S/PDIF, MD600 (2*4TB), QNAP 469L (4*3TB), MS200], Ayre MX-R Twenties, TBD
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Joined: Apr 2008
Posts: 138
Hitchhiker
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Hitchhiker
Joined: Apr 2008
Posts: 138 |
Marc Koval replaced the PSU in the G68 I used to own. Great response time and also made shipping arrangements. If you still have the original packaging, then it is really easy. Good luck.
861v6, HD621, DSP6000s, DSP5k5HC, DSP5000s, Planar 470, Sonos, BD 50, Dune 3.0, NAS, htpc
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Joined: Apr 2009
Posts: 159
Hitchhiker
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Hitchhiker
Joined: Apr 2009
Posts: 159 |
Marc Koval also replaced my G61R power supply with a LPS. Highly recommended.
218, AC12, DSP6000 24/96LR, 4K AppleTV, Sony blu-ray player (BDP S570) and
QNAP TS-251 and a Mac Book Pro (mid 2012), an Intel Nuc8ieBEH
Technics SP10MK2 with Technics EPA100MK2 tone arm and PS Audio Phonolink Preamplfier
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Joined: Nov 2009
Posts: 396 Likes: 2
Hitchhiker
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Hitchhiker
Joined: Nov 2009
Posts: 396 Likes: 2 |
Thanks for all your replies. Marc Koval repaired my G57 and it came back sounding better than ever.
DSP6000, DSP5200, DSP5500VC, P300W, SW1600, G68, 568.2, HD621, G57, G55, Oppo BDP-105.
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Joined: Feb 2012
Posts: 126 Likes: 2
Hitchhiker
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Hitchhiker
Joined: Feb 2012
Posts: 126 Likes: 2 |
Is a very simple change - I had to do my G61R, think the PSU just came from Farnell.
One note of caution - I recall there is a tech note somewhere that you have to set the output of the PSU to exactly 5.00V as measured on the PCB using a trimmer pot on the PSU.
Compatible PSUs may not have this trim feature (or if you are lucky might be accurate enough anyway!).
Last edited by Gruffle; 2015-02-25 13:16. Reason: spelling
G61R, 5K5's (fronts & centre), 5K's (sides & rears), D2500, JVC DLA-X70, QNAP, Roon(Pi)
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Joined: Apr 2004
Posts: 2,492
Senior Shouting Officer
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Senior Shouting Officer
Joined: Apr 2004
Posts: 2,492 |
Actually, people have found the G68 more stable with the voltage set to 5.2
When I replaced mine (via the wiki instructions) the voltage was hovering at 5.0\4.9 for that particular rail and I had had some issues.
Main system - Sources (Kodi-HTPC, Vero 4k, FireTV, Sat) into Trinnov Altitude 32 (8-16) (+Roon), Trinnov Amplitude 8 amp & Vivid Audio (Giya G3, V1.5) and REL Stentor III speakers. Others: F80 + Raspberry Pi and other Pi systems.
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Joined: Apr 2004
Posts: 12,733 Likes: 88
Don't Panic!
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Don't Panic!
Joined: Apr 2004
Posts: 12,733 Likes: 88 |
One note of caution - I recall there is a tech note somewhere that you have to set the output of the PSU to exactly 5.00V as measured on the PCB using a trimmer pot on the PSU. The voltage is set to 5.1V at the factory. Anything less than 5.0V can result in instability and anything more than 5.2V could damage components. 5.1V is "the place to be". Edit: IMPORTANT. 5.1V is recommended for G61R, G61SL, and the various G68s. 5.2V is recommended for the 861v4.
Last edited by VirusKiller; 2015-02-25 14:53.
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Joined: Oct 2012
Posts: 909 Likes: 2
Pan-dimensional being
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Pan-dimensional being
Joined: Oct 2012
Posts: 909 Likes: 2 |
HT: Audiocom LX800CE, MP-60,HOLO MAY*2 Analogue speaker(LRC), DSP5200SL (side), DSP7200SE (rear),AntimodeX4,JTR Cap4000ULF*2,Christie HD8C,GIK Bass Traps.
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Joined: Apr 2004
Posts: 2,492
Senior Shouting Officer
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Senior Shouting Officer
Joined: Apr 2004
Posts: 2,492 |
I've always found the strict voltage tolerance for the G68 surprising. I suspect (but have zero evidence for) that the voltage dropping from 5.1 to 5.0 is a symptom of a failing PSU and that considerably greater fluctuations occur when the unit is working hard and the PSU is under load.
Main system - Sources (Kodi-HTPC, Vero 4k, FireTV, Sat) into Trinnov Altitude 32 (8-16) (+Roon), Trinnov Amplitude 8 amp & Vivid Audio (Giya G3, V1.5) and REL Stentor III speakers. Others: F80 + Raspberry Pi and other Pi systems.
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