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voveo[USER="499229"]voveo[/USER] Could you post links to your ordered ic's?
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Pandor[USER="194028"]Pandor[/USER] How did you know how to wire it up? Couldn't find anything in the 29gl850 service manual. A logic analyzer is new to me. Nice! But at least I would understand how you got the pinout.
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Pandor[USER="194028"]Pandor[/USER] Well, the IC600 is a buck converter and LED driver, so if that one is broken, we would also be seeing no response. But it...
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Did you try to erase, program and verify it with one of the uploaded bin-files? You can do that without desoldering,right?...
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[URL=filedata/fetch?id=3209907&d=1706986274][ATTACH=JSON]{"alt":"Click image for larger version Name:\tblackminiprogrammer.jpg Views:\t0 Size:\t37.3 KB ID:\t3209907","data-align":"none","data-attachmentid":"3209907","data-size":"thumb"}[/ATTACH][/URL]
I used a CH341A Mini Pro programmer and read the EEPROM IC201 (24C32A, 4KB) and the SPI Flash IC202 (GD25Q80C, 8MB). The data didn't appear totally random. (See attached IC201READ4KB_24C32 and IC202READ1MB_GD25Q80.rar.)
Comparison of the result...
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[URL=filedata/fetch?id=3209752&d=1706969263][ATTACH=JSON]{"alt":"Click image for larger version Name:\tS9a1aa675ef9348f4b0ba7a9740b854ffb.jpg_640x640Q90.jpg_.jpg Views:\t2 Size:\t42.1 KB ID:\t3209752","data-align":"none","data-attachmentid":"3209752","data-size":"thumb"}[/ATTACH][/URL]
Testing MP2315 a.k.a. IC402.
I have 18V on pin 2 (IN).
I used a USB buck converter (See image) set to 2.0V and connected the negative to GRD (The metal of one of the connectors, JK102) and the postive to pin 6...
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With the microscope I am also able to read the IC101: [TABLE="border: 1, cellpadding: 1, width: 500"]
[TR]
[TD][I]IC101[/I][/TD]
[TD][URL="https://www.ti.com/lit/ds/symlink/ts3dv642.pdf"]SD642A0[/URL][/TD]
[TD]TI 99A6801 [U]G4[/U][/TD]
[TD]12 channel 1:2 or 2:1 bi-
directional multiplexer/demultiplex[/TD]
[/TR]
[/TABLE]
So if the HDMI would crap out on a later date, I'll have to get new skills to replace that IC....
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So the next thing on the flowchart is the flash memory. I have the ICs: [TABLE="border: 1, cellpadding: 1, width: 500"]
[TR]
[TD][I]IC201[/I][/TD]
[TD][URL="https://www.ineltek.com/wp-content/uploads/manual/fmd/FT24C32A_64A.pdf"]FT24C32A[/URL][/TD]
[TD]9eHBAC[/TD]
[TD] [/TD]
[TD]Two-Wire Serial EEPROM[/TD]
[/TR]
[TR]
[TD][I]IC202[/I][/TD]
[TD]BE1941[/TD]
[TD][URL="https://www.tme.eu/Document/bbb079340ad3295a2e89ae85d688906e/gd25q80c.pdf"]25080CSIG[/URL][/TD]...
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As the numbering is different from ours, I used the datasheets. However, I am interested now wat the analogue to ic705 would be.
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[ATTACH=JSON]{"data-align":"none","data-size":"medium","data-attachmentid":3205990}[/ATTACH]
These were the values that I measured at my defunct board.
(IC402 = AGC = MP2315, IC400 = AQT = MP2315S: 1 = AAM, 2 = IN, 3 = SW, 4 = GRD, 5 = BST, 6 = EN/SYNC, 7 = VCC, 8 = FB)
(IC401 = AKX = MP9148: 1 = FB2, 2 = EN2, 3 = SW2, 4 = EN1, 5 = GND, 6 = SW1, 7 = IN, 8 =FB1 )
So my IC400 also has 3.3V on output.
My 401 has 0.08V and 1.2V on resp. SW1 and SW2. Since EN1 = 1.7V and EN2 = 0.3V, I would expect them to...
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Doesn't mean it's dead. Could also mean that it doesn't receive a trigger voltage on the relevant pins.
I've posted all datasheets a few posts back. On it are the input range voltages and the output response to the control pins....
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[ATTACH=JSON]{"data-align":"none","data-size":"medium","data-attachmentid":3165140}[/ATTACH]
I've blown c451 of the board while I replaced IC402 (|AGCK). Can't find it anywhere.
Would anyone be able to tell me the capacitance? Thanks!...Last edited by markismus; 12-19-2023, 08:52 AM.
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Re: LG 27GL63T-B completely dead
I've used my magnifier and the IC codes are:
[I]IC101:[/I]
SD642AO or SD642A0
TI 69A680I G4 of TI 69A68OI G4
[I]IC201:[/I]
FT24C32A
9eHBAC
[I]IC202:[/I]
BE1941
25Q80CSIG or 25080CSIG
[I]
IC500:[/I]
TPA6138
98T[U]G4[/U]
CISZ
[I]IC600:[/I]
MPS1928
MP3378R
K4871538XRe: LG 27GL63T-B completely dead
I've used my magnifier and the IC codes are:
[I]IC101:[/I]
SD642AO
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Re: LG 27GL63T-B completely dead
I've added 2 Hi-res photo's. (How do you take a photograph from a PCB without the glare?)
The |AKX buck regulator generates 2.0V falling down to 0.89V and continuing on the L409 coil. It's too hot to touch.
The |AGC step down converter generates 0V on the L410 coil.
The |AQT step down converter generates 3.33V on the L405 coil.
I've added the datasheet of these three. It seems that only the |AQT is working as expected. I've ordered the other two from AliExpress. Nor the...
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