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Search: Posts Made By: Ahakim
Forum: Troubleshooting TVs and Video Sources 05-24-2018, 07:31 AM
Replies: 5
Views: 491
Posted By Ahakim
MOSFET Eqivalent of IGBT RJP63K2 in SAMSUNG PLASMA TVC SMPS

Any MOSFET equivalent of RJP63K2 ...found blown in a SAMSUNG plasma TV SMPS?? IF there is ..Please help.. many thanks..
Forum: Troubleshooting TVs and Video Sources 02-10-2017, 03:29 PM
Replies: 21
Views: 1,383
Posted By Ahakim
Re: Lg 47lv3700

What about sound? connect a video source (a demo for instance) and see..Most probably, leds (one or more) are sick!!
Forum: Troubleshooting TVs and Video Sources 02-10-2017, 03:22 PM
Replies: 1
Views: 507
Posted By Ahakim
Arrow LED current consumption in LED LCD TVs

Is there a way to reduce the number of leds (3 arrays, 7 leds in each in the 32" LG TV I'm working on right now... no backlight) without loosing on lighting and picture quality...? 3 strips of 6 in...
Forum: Troubleshooting Power Supplies and Power Supply Design 02-10-2017, 03:00 PM
Replies: 8
Views: 645
Posted By Ahakim
Forum: Troubleshooting Power Supplies and Power Supply Design 02-10-2017, 02:31 PM
Replies: 8
Views: 645
Posted By Ahakim
Forum: Troubleshooting Power Supplies and Power Supply Design 02-10-2017, 02:18 PM
Replies: 8
Views: 645
Posted By Ahakim
Help to find cheapest 12V/5A power supply

I have a THOMSON 24" LCD TV that works with an external 12V/5A (in fact 5.2A rated current consumption). The CHINA-made smps I bought with it just literally burned after a few hours of continuous...
Forum: Troubleshooting TVs and Video Sources 12-14-2015, 12:17 PM
Replies: 8
Views: 2,196
Posted By Ahakim
SHARP LCD TV LC-3244E-BK: No Backlight

TV on by main AC and then by Remote: front LED green. After about 5sec: complete shut down, LED becomes red. All repeats if disconnected and connected again to AC power.
In this TV both SMPS and...
Forum: Troubleshooting TVs and Video Sources 11-09-2015, 04:20 PM
Replies: 3
Views: 587
Posted By Ahakim
Question T-con or Main board Fault in LED TVs

I must say I'm new with LED TV repair...
First: What's different from LCDs besides Backlighting?? What does the absence of backlight mean in most cases of LED TVs? (sound good...)
Can someone...
Forum: Troubleshooting TVs and Video Sources 07-31-2014, 01:02 AM
Replies: 23
Views: 4,944
Posted By Ahakim
Re: TV Power Supply Unit

:nutkick:I think the main cause is that manufacturers don't reveal their "secrets" as easily...specially of newer brands (The laws of Market competition!!). I might be wrong though...
How do you...
Forum: Troubleshooting TVs and Video Sources 07-30-2014, 03:38 PM
Replies: 14
Views: 3,078
Posted By Ahakim
Re: Samsung PS-42C96HD DEAD

OK OK ...
Thanks so much TOM66!! It's a library...
Forum: Troubleshooting TVs and Video Sources 07-30-2014, 03:24 PM
Replies: 14
Views: 3,078
Posted By Ahakim
Re: Samsung PS-42C96HD DEAD

:bow:This is all the info. I can read on the back cover of the 42" SAMSUNG TV (I mentioned earlier):

PLASMA DISPLAY
Model: PS-42C96HD
Model code: PS42C96HDX/XEC
Type No.: CA42C9
AC...
Forum: Troubleshooting TVs and Video Sources 07-27-2014, 05:06 PM
Replies: 14
Views: 3,078
Posted By Ahakim
Re: Samsung PS-42C96HD DEAD

Yes you're right...In fact I wrote all the info. of the power board on a sheet of paper...I closed the TV ... I left the sheet in my workshop...I'm now dead tired at home...
That will be for...
Forum: Troubleshooting TVs and Video Sources 07-27-2014, 04:45 PM
Replies: 0
Views: 1,304
Posted By Ahakim
SAMSUNG PS-42C96HD dead: Problem Solved

:feedback::feedback:
Thanks to the infos I received on this forum... Good guys...the problem is solved:
Indeed the ZENER ZDB803 must be a no less than 15 no more than 30 volts. the ref. on the...
Forum: Troubleshooting TVs and Video Sources 07-27-2014, 04:16 PM
Replies: 14
Views: 3,078
Posted By Ahakim
Re: Samsung PS-42C96HD DEAD

Thanks guys...the problem is solved:
Indeed the ZENER must be a "15 to 30" volts. the ref. on the diode is gone(from heat).
(although the schematic is not exactly the same)
The one in the...
Forum: Troubleshooting TVs and Video Sources 07-27-2014, 08:52 AM
Replies: 14
Views: 3,078
Posted By Ahakim
Samsung PS-42C96HD DEAD

:rejoice:I'm working on a SAMSUNG PS-42C96HD:
TV dead! Not even a standby voltage!
POWER BOARD:
VDD on pin4 of VIPer22A (SMPS primary switcher) is ZERO vollt(s). In fact ZDB803 is short...
Forum: Troubleshooting TVs and Video Sources 05-11-2014, 02:38 PM
Replies: 3
Views: 3,601
Posted By Ahakim
Re: PLASMA TV 42PA4520-TJ: Vs Short cicuited...

:swords:
Many thanks for the reply...
In fact the 2 components are designated on PC board as Q's not D's...This why I assumed they should be FET's.. Next to these I can see other similar (in shape)...
Forum: Troubleshooting TVs and Video Sources 05-11-2014, 07:46 AM
Replies: 11
Views: 1,455
Posted By Ahakim
Re: LG 50PQ300 spark from Y-Sus

There must be insulating pads in such TVs. High current/voltage could cause such sparks from too close components from back or to each other...
Check for carbonisation in spark area...
Forum: Troubleshooting TVs and Video Sources 05-11-2014, 06:53 AM
Replies: 3
Views: 3,601
Posted By Ahakim
PLASMA TV 42PA4520-TJ: Vs Short cicuited...

:violin:

I'm working on an LG PLASMA TVC (model: 42PA4520). Short cicuit because of faulty FETs. I can read the following on 2 of these:
G7S313u
I R 235P
B3

and

G7S313U
Forum: Troubleshooting TVs and Video Sources 04-21-2014, 04:59 PM
Replies: 1
Views: 1,015
Posted By Ahakim
Factory Reset procedure of NEOVIA LCD 32" TV??

Glad... to find the factory reset procedure (to enter the service mode) of a 32" LCD TV. Brand name: NEOVIA!! Any help?
What happened: TV was in prefect working condition... Then transported by...
Forum: Troubleshooting TVs and Video Sources 02-06-2014, 03:34 PM
Replies: 7
Views: 4,189
Posted By Ahakim
Re: Samsung PLASMA PS50C450B1W: Y-Buffer board Problem!!

Sorry...I don't really get what you said in the first reply. Can you be more explicit. Ok ...I'll try ... Thanks anyway.
Note: There is only ONE long Y-Buffer board in this TV.
Forum: Troubleshooting TVs and Video Sources 02-06-2014, 03:24 PM
Replies: 5
Views: 1,181
Posted By Ahakim
Re: LCD TV: LG32LD330 A Repaired

:whip: The fuse is an 8A/250V! Good question,TOM ! In fact I was wondering why the current/voltage rating is so high, While it is supposed to handle an average 40mA / 24VDC!!!
Forum: Troubleshooting TVs and Video Sources 02-06-2014, 03:15 PM
Replies: 7
Views: 4,189
Posted By Ahakim
Samsung PLASMA PS50C450B1W: Y-Buffer board Problem!!

:confused: No light on screen. TV ON by TLC or by hand on front panel: power red led blinks once and TV goes back off. Relay can be heard switching on and off again repeatedly...
When Y-main board...
Forum: Troubleshooting TVs and Video Sources 02-06-2014, 02:36 PM
Replies: 5
Views: 1,181
Posted By Ahakim
LCD TV: LG32LD330 A Repaired

:bow:TVC LCD
Model: LG32LD330 A
Dark screen, Very very dim blue light uniformly on all screen (almost nothing).
24VDC gets to Starting circuit(from smps). However no voltage to Inverter IC(Ref...
Forum: Troubleshooting TVs and Video Sources 12-18-2013, 07:03 AM
Replies: 1
Views: 1,074
Posted By Ahakim
Arrow Looking for PCB NO: LJ41 - 05122A of PLASMA TV

:fart:
Where can I find this part (Y-Buffer "low")
PCB NO: LJ41 - 05122A
PBA NO: LJ92 - 01492A ??

of the Plasma TVC PHILIPS 50PFP 5532D/12 ?? Price?? Samsung SOLD OUT!!!
Forum: Troubleshooting TVs and Video Sources 12-13-2013, 02:26 AM
Replies: 0
Views: 1,326
Posted By Ahakim
50" Philips Plasma TV: NO BACKLIGHT

:p: Could someone help...?
50" Philips Plasma TVC
Philips S LC7 .2E PA (From inside: all boards are Samsung as well as the panel ..!)
Model N 50PFP 5532D/12
220VAC/380w!!
Made in Hungary
...
Showing results 1 to 25 of 57

 
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