Re: Samsung LE27T51BX/BWT no start
Pictures from AV IN and menu...
rafis
Member
Last Activity: 07-26-2017, 09:29 AM
Joined: 05-27-2017
Location: Kazan
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Re: Samsung LE27T51BX/BWT no start
Blue screen and menu are perfectly fine. Input at the picture is from PC D-SUBLeave a comment:
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Re: Samsung LE27T51BX/BWT no start
Replaced inventer. Unit is starting up, but I got bad picture. Please see screen attached...Leave a comment:
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Re: Samsung LE27T51BX/BWT no start
Will desolder and check them later just to confirm. Have to find second solderer in garageLeave a comment:
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Re: Samsung LE27T51BX/BWT no start
Smd fuses require second tip, that I don't have. Instead removed caps and checked fuses again, all open (caps were parallel to fuse). Fuse order cost is approx. same as board, so will order a boardLast edited by rafis; 06-05-2017, 10:54 AM.Leave a comment:
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Re: Samsung LE27T51BX/BWT no start
In ohms range all four have open loop.
What should I check to prevent repeated fuse blow?Last edited by rafis; 06-04-2017, 01:43 PM.Leave a comment:
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Re: Samsung LE27T51BX/BWT no start
One side is constant 24V, other side is growing from 16V to 22,5V during 30 seconds, then ranges 22,4-22,7V. This is for F4 and F2. Also meashured F1 and F3 one side is 1.4V and another 24VLast edited by rafis; 06-03-2017, 12:45 PM.Leave a comment:
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Re: Samsung LE27T51BX/BWT no start
It's short first second then opens....Leave a comment:
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Re: Samsung LE27T51BX/BWT no start
1 BL ON/OFF 5,27
2 A/D 3,25
3 P/D 4,94
4 GRD 0
5 24V DET 5,22
Yes, I have checked the fuse on the inverter board. But I'm not sure if I should desolder it. It shows 2 MOhm and goes down. In continuity meashurement node it shows short first half a second....Last edited by rafis; 06-03-2017, 09:52 AM.Leave a comment:
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Re: Samsung LE27T51BX/BWT no start
How do I freeze eeprom?...Leave a comment:
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Re: Samsung LE27T51BX/BWT no start
BL ON/OFF - 5,2V constant
P/D - 4,9V
Also noticed light "shsh" in the speakers during 15 sec after switching on, then LED switches of. If Power button is pressed, it goes to the S/B mode (LED is on), if pressed again - starts to blink as on startup and everything repeates againLast edited by rafis; 05-30-2017, 09:27 AM.Leave a comment:
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Re: Samsung LE27T51BX/BWT no start
image - no
24v - yes
bl_on signal is coming but not constantlyLeave a comment:
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Re: Samsung LE27T51BX/BWT no start
Pin# - Pin Description - Pin Voltage standby - Pin voltage power on
1 - POWER_ON/OFF - 0v - 2,9v
2 - ST/BY_6.2V - 6,66v - 6,12v
3 - GND - 0v - 0v
4 - GND - 0v - 0v
5 - GND - 0v - 0v
6 - 12V - 0v - 12,08v
7 - 12V - 0v - 12,08v
8 - 12V - 0v - 12,08v
9 - GND - 0v - 0v
10 - GND - 0v - 0v
11 - GND - 0v - 0v
12 - 5,4V - 0,2v - 5,39v
13 - 5,4V - 0,2v - 5,39v
14 - 5,4V - 0,2v - 5,39v
15 - GND - 0v - 0v
16 - 12V - 0,05v - 13,21v...Leave a comment:
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Samsung LE27T51BX/BWT no start
SUMMARY
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Samsung LE27T51BX/BWT
CPU: FLI5921H-LF
Panel: V270B1-L01 rev c1
T-con: V270B1-L01
Inverter (backlight): DARFON V070 4H.V0708.001 /E5 OZ960GN, LM339, 4006A, FDS8958A
THINGS TESTED
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Had trickling at start. STB voltage was 16V
After replacing Power board components no start, red LED, all voltages on the exit connectors of the power board are tested and OK
Parts replaced: CM852, 851, 856, 860, 861
CS804,
IPS801S
DZS801, DZS802, DZ803
With Main board disconnected backlight...Last edited by rafis; 05-27-2017, 10:09 AM. -
Re: New Members - please post your introductions here
Hi, I'm Rafis. TV repair is my hobby.Leave a comment:
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