Re: Cyber Power 2200E not switching to AC power (0V output)
Hello all,
please don't ask me to publish SM here, i don't want to be responsible for any copyright infringement, its a Cyberpower authority
i can send to moderators and then forum badcaps.net can be responsible
mladen82
Member
Last Activity: 09-22-2020, 12:30 PM
Joined: 03-07-2009
Location: Podgorica
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Re: Acer Aspire 5750-Dead, No Power or Lights
On same motherboard i found that are shorted:
main cpu (voltage rail +1.05VS_VTT)
something else on same rail, maybe main chipset itself
PU1 definite
several PQxx mosfets
so this is not profitable to repair in my opininonLeave a comment:
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Hi
give me email to send you service manual of Cyberpower UPS -
Hi mladen82.
I've only just seen your posts. If I could get a copy of the circuits and manuals as you offered, I will be eternally grateful!!
Best Wishes,
Susi. -
Re: Cyber Power 2200E not switching to AC power (0V output)
I think that finally find root cause of problem.
It is a NPN transistor MPSA42 in TO-92 package (Q9) that drive main relay, precisely there are two of them but only one was bad (diode test-open circuit both base-emiter, base-colector).
I change both MPSA42.
UPS works for now, will test couple of days.Leave a comment:
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Re: Cyber Power 2200E not switching to AC power (0V output)
Unfortunately, UPS come back for repair.
Same problem.
I found that -15V voltage is actually -10.5V. Checked all components in circuit for generating -15V but all seems ok.
I can't find out why this voltage is not good, its not voltage regulated, no regulator, delivered by LM324 op amp probably some pwm configuration.
I doubt that PCB maybe since is double-side have some bad via connections.
ps. i have schematic and service manual so anyone if need, contact by pm.Last edited by mladen82; 09-10-2013, 05:34 AM.Leave a comment:
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Re: Cyber Power 2200E not switching to AC power (0V output)
Problem solved!
Re-soldered solder joints for all relays on pcb (there are 4 of them). Seems that were cracks in solder. First remove them completely then rework by new soldering.
Also replaced all 22uF/50V and 47uF/63V capacitors.Last edited by mladen82; 08-30-2013, 03:37 AM.Leave a comment:
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Re: Cyber Power 2200E not switching to AC power (0V output)
I have identical problem with this UPS.
I found near all 22uF/50V caps are bad, and one 47uF/63V.
But still problem is exist, no voltage from mains 220V.Leave a comment:
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Re: Samsung Syncmaster 245BW
Ooh yes, i saw
thanks...Leave a comment:
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Re: Samsung Syncmaster 245BW
don't have esr tester,
but seems like primary capacitor is slightly bulged, but i don't have such capacitor for replace, dimensions are crucial
however monitor is returned to user
we will see if monitor come back again...Leave a comment:
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Re: Samsung Syncmaster 245BW
Ok, problem is solved with replacing burned resistor RB805 (temporaly with 45ohm).
Now i reading both main voltages +5.3V and +24V.
PFC was not in function because of open RB805.
Thanx [B]cloepula[/B] for resistor
In for turn, i measure normal condition (PS ON) voltages VCC for IC's
VCC voltage on ICE3B0365J - 12,5V (stable)
on PFC 4863g - 15V (stable)Re: Samsung Syncmaster 245BW
Ok, problem is solved with replacing burned resistor RB805 (temporaly with 45ohm).
NowLeave a comment:
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Re: Samsung Syncmaster 245BW
I shorted Stb +5V with PS_ON pin, so i can simulate Power On state.
I done some measurement, voltage on primary capacitor CP803 is 310V, so i assume PFC controller is not in working condition.
PFC controller is 4863G, VCC is 0V in Power On state, so PFC is not running.
Will continue to troubleshoot this.Leave a comment:
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Re: Samsung Syncmaster 245BW
Its marked BQ on my board, QM802 and seems ok. It is probably NPN transistor....Leave a comment:
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Re: Samsung Syncmaster 245BW
I find burned resistor RB805 burned too....Leave a comment:
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Re: Samsung Syncmaster 245BW
I can't find that ic on my board!!!???...Leave a comment:
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Re: Samsung Syncmaster 245BW
Hi to all!
I have exact problem with Syncmaster 245B, model code LS24HUBCBQ/EDC
Power board: BN44-00173A
Standby voltage +5V is present but no main +5.3V and +24V for inverter
Stay tuned for problem seeking.Leave a comment:
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Re: Problems with Samsung 740N monitors
also check optocupler 817Leave a comment:
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Re: Viewsonic VP211b
[URL=http://img218.*************/my.php?image=lcd1.jpg][/URL]Leave a comment:
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Re: Viewsonic VP211b
maybe this picture can help you
[URL=http://img24.*************/my.php?image=lcdj.jpg][/URL]
middle chassis is plastic frame, be aware that this is for lcd tv panels but with lcd monitors you only have two pair of ccfl, up and downRe: Viewsonic VP211b
maybe this picture can help you
[URL=http://img24.*************/my.php?image=lcdj.jpg][/URL]
middle chassis is plastic frame, be aware that this is for lcd tv panels but with lcd monitors you only have two pair of ccfl, up and downLast edited by mladen82; 05-07-2009, 12:14 PM.Leave a comment:
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Re: Viewsonic VP211b
if problem is with backlight unit, you can disassemly carefuly, but be aware any dust will easily stay inside backlight films
face down lcd on soft cloth, remove four crews, and the cover
then use flat screwdriver to unlatch catches
then turn over lcd and carefuly remove metal frame
lcd panel is probably sealed together with plastic frame, you can carefuly try on edges with flat screwdriver to pull, try to avoid touch panel with fingers inside but you must remove lcd from plastic frame
then you have...Last edited by mladen82; 05-07-2009, 12:07 PM.Leave a comment:
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