So for reasons I am not sure of the backlights are coming on the moment you plug in the power and they stay lit, no dimming. Still no red STB light. The voltages on XP811 connector on the power supply board are now: 11.87v from 8v, 16. 65v from 13v and 1.86v on STB pin. The panel is off.
I am trying to upload the schematic diagram and some couple of main board and power supply board pics but I can't I will keep on trying....
Rusenga
Member
Last Activity: 04-11-2024, 10:07 AM
Joined: 02-08-2017
Location: Johannesburg
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Hisense 55u7wf no power
Hie techs, I have a Hisense 55u7wf which is not powering on. Changed the power supply board but still nothing.
The power board has no stby voltage
It has 8v instead of 12v, 13v instead of 18v.
Somebody help me or may I have schematic diagram of the TV
Main board - RSAG7.820.9580/ROH
Power supply board RSAG7.820.8717/ROH -
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Samsung PS43E450A1R Picture Problem
Hie techs, I have a samsung plasma TV which when plugged in shows a very dull reddish image. Tested some voltages and below is what I get:
Note the green light on the tcon flashes every second.
Power supply board:
PS on 0v
Stby 5v
VS CON 1.72v
VS ON 3.2v
VS 208v
VA. 57v
X buffer :
Svt vs 209v
Svt xout>flactuating between 280 to 900v
Y main board:
Svt vs. 208v
Svt ve. more than 1000v
Svt yg c More than 1000v
Svt yout flactuating between 400v and 1900v
Svt... -
Re: Sony HCD-SH2000 No sound
Thank you for your reply. I did check Q207 it has -3v on the collector, 3.3v on the emitter and 3.2v on the base. However pin 51 on IC100 has a 3.2v out of the IC which is coming on and off every 3s or so. I isolated the pin and there is no change the 3.2v is still going on and off. With pin 51 on IC100 isolated, the voltages on Q207 are stable. I am suspecting IC100 might be faulty but I may be wrong.Leave a comment:
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Sony HCD-SH2000 No sound
Hi techs, I have a Sony hcd-sh2000 sound system which has very faint sound output behind a loud humming noise. I have tested all semiconductors voltages against ones in the schematic and all seem to be ok except mute output from system controller IC which is a 3.3v but is appearing and disappearing. I have isolated this leg but still the 3.3v is on and off. Anyone ever come across this fault please help.
See attached the schematic and the main and amp boards.... -
Nec sl1000 pabx
Hi techs, can someone help me with a firmware version v7.20 or later for a NEC SL1000 pabx EMEA Region. In particular I am looking for the CPU.nomem and MEMDB.pkg files of the firmware version. Thanks in advance. -
Samsung UA39EH5003R Stuck on standby
Hi techs, I have a Samsung ua39eh5003r which switches on and then goes to standby. I have to wait for a day or two for the tv to switch on again, all the time it is stuck on standby. I have checked the voltages on the power supply board on both occasions when it is on and off and these are my findings:
[B]Connector CNM803:[/B]
[U]TV ON[/U]
Pin1,3,4,5(Vamp),7(Vamp)- 12.6V; Pin2(PWM_DIM)- 0.96v; Pin6(BLU_ON/OFF)- 4.41v; Pin8,9,10- grnd; Pin11,12,13- 5.16v; Pin14(Power ON/OFF)- 3.3v
[U]TV OFF[/U]
Pin1,3,4,5(Vamp),7(Vamp)- 12.6V; Pin2(PWM_DIM)- 0.06v;... -
Re: Telefunken 32" LED TV Model TLEDD-32HD Require Firmware
[QUOTE=angelos;852798]Hi all.
I am desperately looking for an eprom dump for the above set. The set is stuck on standby and suspect eprom. All voltage regulators on board are active. Pressing on the standby button on the tv or on the remote makes no difference to any voltages and standby led is permanently lit. This is a "all in one board". The panel number is HV320WX2-500 and the chassis number is CV59TH-A32. The Eprom is a 25Q32BSIG.
Hi, has anyone came across this...Leave a comment:
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