I remove all mosfets with heatsin and test all them with universal tester (for transistor, capacitor, resistor etc...) and all of them are working.
Next i`ll unplug all optrones and test them. There is 1 resistor R500 and on PCB i measure over it 2.5ohm. I`m not shure in his code but it
looks like red red gold gold green. But nowhere there is option gold to be on 2nd or 3rd position... Even if colours are red red yellow yellow green - it
must be some kiloohms.
Also will try to check where are going FPOB and PGO pins.
Btw on primary side there is cm6800tx IC. I`ll...
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I work after test lamp (75W)
In normal state on FPOB there is 4.91V. When i connect green to black - it goes to 0V. I make bridge between pin #2 and #3 (FPOB and GND) and then green to black - again
PSU start for second and power off.
I take second working PSU and with 5W, 12V bulb i injecti 3.3, 5 and 12V. When i power up working PSU - it is OK. There is no short in not working psu.
When i try to power up not working PSU lamp light up may be at 100%.
4 diodes on heatsink (for low voltages) are OK - i remove them with heatsink and measure them.
...4 Photos
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Problem with PSU Cooler Master MPX-5501-AMAAB
Happy new year.
This PSU use WT7527V supervisor.
On purple cable i have 5V, but on #4 of WT7527V i have 0.21V.
If i try to start PSU with short between green and black it star for a second and stop.
For what other to check? I now that is needed more info but i don`t know what else to share
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Re: LG 32LN540B power on problem
May be yes. Thanks for all your support...
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Re: LG 32LN540B power on problem
There is backligh, voltage is 66V and other voltages seems to be OK...
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Re: LG 32LN540B power on problem
It is better - 3.45V
So, may be fault mainboard?...
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Re: LG 32LN540B power on problem
Thanks. I upload pdf that i have for 2.4...
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LG 32LN540B power on problem
Hi,
The power board is EAX64905001 (2.7), over
internet i found wiring for (2.4).
May be the whole problem is that
i have 3.13V instead 3.5V. When i power up tv
the red led light up for ~10secs, then power off
for 3-4sec, and again power on, power of, etc.
In version 2.4 output 3.5V came from main transformer - D203-
C201- LB201- C209-C210.
But in my case (2.7) 3.5V came from IC202 (NR891D).
In hid datasheet there is only info that from output must
have 5kohm resistor to FB to produce 3.3V but i can`t find
what...Last edited by stomanata; 03-22-2023, 12:01 PM.
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Re: Philips 715G6353-P01-001-002H Low voltage from PSU board
It is 310V DC. BTW can i add bridge over choke to ignore PFC?
It also mean to remove mosfer or PFC chip/controller...Last edited by stomanata; 09-22-2021, 09:44 AM.
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Re: Philips 715G6353-P01-001-002H Low voltage from PSU board
715G6353-P01-001-002H is the whole number and there is the same board for sell and
also service manual of it.
There is pin #3 labeled PS_on and there is no voltage over it.
Over both capacitors (they are in paralel) there is 310V
Is there wiring but with control point/voltages on it?...
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Philips 715G6353-P01-001-002H Low voltage from PSU board
Hi,
I have 715G6353-P01-001-002H from Philips TV.
TV doesn`t start up even there is no red led light.
I noticed that 12V rail has 8.5V.
Suggestions for repair?
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CV9202L-K no backlight
Hi,
i have problem with this mainboard.
On inverter socket i have 12VDC but there is
no backlight on screen.
I try with other screen but the result is the same.
I can`t find where goes on/off and dimm lines.
Any suggestions?
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Re: Tv Grundig Vision 2 22-2920 turn off after 2 secs
This must be better. On my pc i can zoom enought to see all details.
For inverter i remove both mosfets that drive HV transformer and use
560 ohm resistor to ignore OLP.
Inverter is based on DF6113. In datasheet is labeled to use series resistor for DIM......
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Re: Tv Grundig Vision 2 22-2920 turn off after 2 secs
No luck...
I connect VCC and GND over FAN7314.
Also ENABLE of driver over pin #3 of FAN.
ADJ of driver first i try over pin #8, but it start too bright
and led strip start to blink.
Then i try over pin #7 of FAN, but it is the same.
Now i wonder if i connect resistor in series of ADJ.
It must be PWM there...
Other solutions?
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