Badcaps.net Forum
Go Back   Badcaps Forums > Troubleshooting Hardware & Devices and Electronics Theory > Troubleshooting Computer Displays
Register FAQ Calendar Search Today's Posts Mark Forums Read

 
Thread Tools Display Modes
Old 02-26-2021, 12:06 PM   #1
jlum1951
New Member
 
Join Date: Feb 2021
City & State: Lafayette, CO
My Country: United States
I'm a: Knowledge Seeker
Posts: 2
Default HP w1907 2007.01.15 ILP1-027 troubleshooting

I've been struggling to find a schematic for a pesky HP w1907 monitor. Sometimes it flickers, sometimes it reverts to a 2 seconds to black. I have opened it up more times than I care to remember, reflowed solder, or switched lamps around and it magically may seem fine, then I put it back together and it will misbehave again. Some have replaced lamps but this can all the lamps suddenly go bad?

The power board marked as 2007.01.15 ILP1-027. It seems there are schematics for the later versions but they seem to be totally different. One thing I want to bring to the attention of this forum for those with the named power board is the datasheet for the IC501 Inverter Controller that is surface mounted to the back of the power board. This device is responsible for soft-start powering on the lamps, dimming, as well as shutting down the lamps in case of an OVP fault or open lamp protection. In other words, everything downstream of IC501 is slaved to it. The datasheet also includes a simplified application circuit which has been very helpful. The datasheet is attached.

But if anyone has a real schematic for this monitor with the above named power board, please post. Thanks.
Attached Files
File Type: pdf OZ9938GN_O2Micro.pdf (265.2 KB, 13 views)
jlum1951 is offline   Reply With Quote
Old 04-08-2021, 02:00 AM   #2
kasfamily
Badcaps Veteran
 
kasfamily's Avatar
 
Join Date: Aug 2014
City & State: Vologda
My Country: Russia
Line Voltage: 220VAC 50Hz
I'm a: Knowledge Seeker
Posts: 299
Default Re: HP w1907 2007.01.15 ILP1-027 troubleshooting

Hi,
It’s necessary to check each lamp separately with another single-lamp inverter
kasfamily is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



Badcaps.net Technical Forums 2003 - 2021
Powered by vBulletin ®
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
All times are GMT -6. The time now is 04:59 PM.
Did you find this forum helpful?