Re: Help with Parts Identification TV Board: JUC7.820.00208835
Thx a lot for the help.
Thank you to the guys at HEGE supporting Badcaps [ HEGE ] [ HEGE DEX Chart ]
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Help with Parts Identification TV Board: JUC7.820.00208835
Hi,
Any kind sould with a JUC7.820.00208835 TV board on hand that could help me
identify the values of some components, these are in the feedback section near the optocoupler, i need to know the value of:
Resistors: RP28, RP27, RP25
IC: UP2
I attached a picture for easier finding of the components in question.
Thx in advance....
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Re: Help with TV PSU LEKE LKP-PL034
Thx for info, i will report back after i get the parts.
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Help with TV PSU LEKE LKP-PL034
Hi everyone,
I have this LEKE LKP-PL034 PSU from a Blaupunkt 23/157I TV and need help identifying some components, namely the pwm controller and some blown up component near the optocoupler.
Thx in advance for any info....
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Re: Toshiba 40TL933
Found the problem the transistor marked in the picture was short between base-emitter, replaced it and all is working ok....
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Re: Toshiba 40TL933
Thx for the help, i will give a check in the primary section, will report my findings.
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Re: Toshiba 40TL933
Main filter caps are at 327v with and without jumper.
Also don't know if this helps but there is no voltage present on U1 (L6571B) pins 1&4.
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Re: Toshiba 40TL933
Sorry if i give a poor response, i will try to be more on the point.
So pins 9-11 jumped, no 12v or 24v present
Attached picture shows the measurements at several points following pin 11 path....Last edited by VHSFI; 04-18-2022, 11:18 AM.
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Re: Toshiba 40TL933
Appreciate the feedback, and while i am not a professional i am aware of the dangers and where i can not put my fingers the questions i make may a seem a bit newbish but that's just because i just want to be sure i don't mess up.
As for the psu it's dead, it does not power up, gonna check a few components in the area, you think it can be an optocoupler ?
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Re: Toshiba 40TL933
So how do it turn the psu on without the mainboard? Is it that wire i see on the back of the board in the picture you posted? Also are there any other signal present besided the +5V when the psu is in standby (AC_DETECT/ POWER_TV / POWER_SIG....)
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Re: Toshiba 40TL933
Update:
So i can't find anything obviously wrong in either the psu or the main, so i decided to do a test and supply the mainboard with +5 and +12v and the main board works i get the standby light and the board turns on and off with the remote or power button.
Does anyone knows if this psu is also supposed to output +12v while in stanby....
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Re: Toshiba 40TL933
I also forgot to mention that the set started to shutdown by itself after a couple minutes of being on and a few times even turned on by itself.
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Toshiba 40TL933
Hi Everyone,
So i have this TV that is apparently dead, no standby led and no response to any remote or buttons press.
The only signal i got on the psu side is 5V witch will be converted on the mainboard side to 3.3V_STANDBY witch i was able to track and is present.
I am trying to figure out where the problem lies (mainboard / psu) any tips are welcome.
Thx in advance.
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Re: LG 42PQ3000 Image Problem
Hi again,
Did the cleaning in the bottom tab connectors but the problem remains, thx for the info.
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LG 42PQ3000 Image Problem
Hi,
I have this plasma tv that has this grainy aspect (more at the borders) and some vertical lines at intervals.
VA/VS voltages are ok.
Any tips on what may be causing this problem?...
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Sony HK5 DA0HK5MB6F0 MBX-269 Rev.F
Hi everyone,
I have a problem with this mainboard, original problem was PU101 very hot and no system response, after replacing it with a new one voltages started to appear but no response to power button, replaced EC controller, now after power button press the power led and battery led light up and then turn off and the system doesn't start.
Bios has been reflashed same symptom, also EC controller was replaced to another new one and same symptom. Battery charges ok.
Here are some measured values:
Before Power Button Press:
EC_WAKE_ON...
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Re: Sanyo PDP-42PF2 Stuck on StandBy
Here they are, sry about the quality if you need to know some reference or part number let me know....
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Re: Sanyo PDP-42PF2 Stuck on StandBy
Repeated again with remote and even removed the connection to the front panel buttons so that we can rule out a bad switch, voltages remain the same, from observation all caps seem ok no bulges or similar visible problems.
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Re: Sanyo PDP-42PF2 Stuck on StandBy
There are no changes in the voltages when pressing the panel buttons or the remote.
The behavior before it stopped turning on for good was that sometimes it would not turn on imediatly and it would turn it self on after a couple of minutes.
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Sanyo PDP-42PF2 Stuck on StandBy
Hi,
I have a Plasma TV Sanyo PDP-42PF2 (seems based on a samsung chassis) that is stuck on standby, it does not respond to remote control or front panel buttons, all voltages on the PSU section are down with the exception of the ones i presume are responsible for the standby circuit and connect to the control board (attached picture) this connector has the following voltages:
Vsb - 5.23V
Vson - 0.2mV
AC_DET - 5,20V
Relay - 4.10V
D5V - 2.3mV
DEV3 - 20.6mV
Any help would be apreciated....
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