Re: upgrading HP 2509B to LED - Need help
does anyone know what the voltage range that is needed for the brightness control to work correctly. obviously the connection i made does not have enough range (1.2v to 3v) for it to alter the brightness by much. could i hook it to a higher voltage source, lets say 5v and use a potentiometer (that i could mount next to the on/off switch i did) to alter the voltage from that to 0v. Or do i do the same with the voltage i have 3v and make adjustable down to 0v. The controls for brightness to operate in reverse but that doesn't bother me. Just...
cherokee.warrior
Senior Member
Last Activity: 03-23-2024, 11:37 PM
Joined: 05-11-2017
Location: Wichita, KS
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Re: upgrading HP 2509B to LED - Need help
I have it in a usable state at least...Leave a comment:
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Re: upgrading HP 2509B to LED - Need help
I used the pin 6 for the dim connection but it does not dim by very much. My guess its not a big enough voltage change for the led board. I hooked the led enable to a 5v source and i put a toggle switch between the dc-dc converter and the led board on the positive wire to turn off the leds.
I suppose I could a potentiometer to control the voltage for dimming, create a larger voltage change.Last edited by cherokee.warrior; 07-19-2021, 03:49 PM.Leave a comment:
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Re: upgrading HP 2509B to LED - Need help
OK.. Got the DC-DC converter is wired and adjusted to 12v. The dim wire from the led board is connected to the yellow wire i connected to the power board /inverter brd (which is wired ultimately to pin 6 of U1 (it does go thru a 100k and a 10k resistor and a cap before it gets to pin 6 on U1)) the brightness does work but does not adjust the brightness a whole lot and the adjustment is reversed (lowering raises brightness - raising lowers brightness). I'm wondering if wiring dim directly to U1 #6 pin will give increase the level of adjustment...Leave a comment:
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Re: upgrading HP 2509B to LED - Need help
I am waiting for the dc-dc buck converter to show up which is sometime this Sunday. Once I have that I will wire it to the plus side of one of the 31v electrolytic caps and the negative to power board ground plane and adjust the voltage down to 12v. I am thinking about connecting both wires (enable & dim) to pin 11 of cn853 which becomes pin 6 on the iltr-034 board (except it has two resistors and a cap it runs thru the board before it gets to U1 pin 6 on iltr-034 board). I found a spot on the power board that i have wired a yellow wire...Leave a comment:
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Re: upgrading HP 2509B to LED - Need help
the pin 11 i was talking about was from the cn853 connector and cable that runs from the power supply to the main board and not the IC. It changed in voltage when i went into the brightness settings of the monitor and adjusted it up and down it went from 3v to 1.2v and back up when i turned it back up. but that pin also has no power when the power for the monitor is shut off.
on IC U1 i get 2.9v on pin 6 (enable and and pwm dimming input) and zero on pin 7 (pid-analog dim).
I have traced pin 11 from Cn 853 and it goes...Last edited by cherokee.warrior; 07-16-2021, 11:18 PM.Leave a comment:
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Re: upgrading HP 2509B to LED - Need help
ok just tested ping 11 on cn853 on power board. when monitor is powered up and using my led tester to power the leds not very brightly but enough to see the screen. I have got into the brightness setting and went from 100% to zero and and pin 11 goes from 1.2v to 3v. so I'm guessing i have found the brightness control connection. But when power is shutdown on the monitor pin 11 has no power so it acts as an on and off connection. so could I hook both the enable wire and the brightness wire together and connect both to pin 11?
...Leave a comment:
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Re: upgrading HP 2509B to LED - Need help
Ok testing the electrolytic caps on the power board they are either 31v or 5v so I am guessing i will need to get a dc-dc buck converter for supplying the power for the led board. On Cn 853 on the power board i am reading (this is the cable running from the main board to power board).
color on off
1 red 5v 5v
2 nw (no wire)
3 blk 5v 5v
4 blk 5v 5v
5 blk 5v 5v
6 blk 5v 5v
7 blk 0v 0v
8 blk 0v 0v
9 blk ...Leave a comment:
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Re: upgrading HP 2509B to LED - Need help
iltr-034 rev:a
...
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Re: upgrading HP 2509B to LED - Need help
I think i might have figured out some of this but checking for confirmation. There Is a daughter board connected to the power board before the circuit gets to the transformers. It is iltr-034 rev:a it has an IC on it U1 (inl816gn). Im thinking this chip is where i get the connections i need for the on and off, also the dimming. Will i need to do something to disable the transformers so they are not under power anymore. I will upload pictures of the iltr-034 the whole board when I can....Leave a comment:
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Re: upgrading HP 2509B to LED - Need help
yes there are no markings on the board. I have looked all over the internet trying to find a service manual or schematic to this monitor and have had no luck finding anything. I have even tried looking for something that used the same boards like a different model and no luck there. Trying for find out what i need to look for when probing the board does help. Im sure i will have more questions once i start probing around for voltages and such
.
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Re: upgrading HP 2509B to LED - Need help
the cable running from power to main board.
on main board side
1 Red 5v
2 black 5v
3 black 5v
4 black 5v
5 black 5v
6 black 0
7 black 0
8 black 0
9 black 0
10 black 135mv
11 black 0
12 black 3.2v
on power board side
1 Red 5v
2 no pin no wire
3 black 5v
4 black 5v
5 black 5v
6 black 5v
7 black 0
8 black 0
9 black 0
10 black 0
11 black 135mv
12 black 0
13 black 3.2vLast edited by cherokee.warrior; 07-09-2021, 08:59 PM.Leave a comment:
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Re: upgrading HP 2509B to LED - Need help
this is what i am looking at
[url]https://www.amazon.com/dp/B00XFXM4NA/?coliid=I3BMNBRGKRE6BP&colid=2O7R9U2GVT44Y&psc=1&ref_=lv_ov_lig_dp_it[/url]
and
[url]https://www.amazon.com/dp/B01MQGMOKI/?coliid=I1ITA6VCCS7VPA&colid=2O7R9U2GVT44Y&psc=1&ref_=lv_ov_lig_dp_it[/url]
unless you can suggest anything better...Re: upgrading HP 2509B to LED - Need...ig_dp_it[/url]Last edited by cherokee.warrior; 07-09-2021, 02:32 PM.Leave a comment:
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upgrading HP 2509B to LED - Need help
I have spent a while trying to get My Hp 2509B Monitor to work by fixing the power board. the stand off board than needed 3 items replaced
(HP 2509m Monitor PS ILPI-162 Repair Kit) and i also replace the transformers (Transformer SPW-068) and a tube and its still having the shutdown issues.. I have decided to just upgrade the monitor to LED instead so i don't have to deal with this tube issue again. The only issues I have is one the boards are not marked telling me what each wire is at the connectors and the other is trying to figure out where to connect up the wires when i do buy the... -
Samsung-UN39FH5000FXZA-Will Not Turn ON
I have tried all that was listed on the following link
[url]https://www.badcaps.net/forum/showthread.php?t=53185&highlight=un39fh5000fxza[/url]
the reading i get on cnm803 connector on the power supply are as follows:
b13v 12.9v
b13v 12.9v
vamp 12.9v
vamp 12.9v
gnd 0
b5v 5.3v
b5v 5.3v
pwm_dm 3.2v
b13v 12.9v
blu on/off 2.9v
gnd 0
gnd 0
a5v 5.3v
pwr on/off 2.3v
If i completely take the... -
Re: Sanyo FW55D25F stuck in color test mode
I tried what you described and nothing happened the screen remained black. 12 volts to fuse and board grounded....Leave a comment:
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Re: Sanyo FW55D25F stuck in color test mode
not sure where the letters in the alphabet are on the remote but i tried converting the letters into numbers that you would see on a phone. That didnt work. where does the L A L K L H L I L B come from? how do i convert to what is on the remote?Leave a comment:
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Re: Sanyo FW55D25F stuck in color test mode
Here is the pinout i intended to post for power board...Leave a comment:
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Re: Sanyo FW55D25F stuck in color test mode
The white page is not what I intended to post ahhhh...Leave a comment:
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Re: Sanyo FW55D25F stuck in color test mode
Ok i have been working hard to find out what the pinout on the power board is so here is what i have come to.
Pins 1 2 3 4 P-On 21v
Pin 5 Board ground
Pins 6 7 8 9 Amp +13v
Pins 10 11 12 13 14 15 Board ground
Pin 16 All 3.3v
Pin 17 BL-ADJ
Pin 18 P-on H2
Pin 19 BL-SW
Pin 20 Reset
Pin 21 Protect 3
Pin 22 Protect 1
Pin 23 Does not seem to go to anything
Its getting late so i will i will get to looking at it more at a later time. I hope what...Leave a comment:
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