Hi,
Please see these threads for past issues to do with me trying to fix this Toshiba 32C3035D TV.
https://www.badcaps.net/forum/showthread.php?t=12604
https://www.badcaps.net/forum/showthread.php?t=12874
I am now at the stage where I have replaced the inverters with different units from a Philips TV that looked almost identical (same connectors for 24V input).
I didn't have the correct ribbon cable and using a CAT5 cable introduced too much resistance. So I instead created an extension cable for the right hand CCFL and then used short lengths of wire to connect the boards together (see attached), separated by plastic stand-offs.
The PCB design had nice copper pads that went to each pin which made connecting in this way quite easy and I'm sure nothing is shorted out. The extra wire in the picture is just a grounding wire as they old units were screwed to the chassis, which I can no longer do.
Problem :
The backlights now turn on for 2 seconds and aren't bright enough to light the whole screen (blackish area in the middle of screen). I've seen what it was like with the old inverters and it should be much, much brighter!
- Are the inverter boards simply not powerful enough? (the MOSFETs on the old boards do seem much bigger)
- Are the voltages just wrong for these CCFL units and I need to replace them with different ones?
Any ideas?
Please see these threads for past issues to do with me trying to fix this Toshiba 32C3035D TV.
https://www.badcaps.net/forum/showthread.php?t=12604
https://www.badcaps.net/forum/showthread.php?t=12874
I am now at the stage where I have replaced the inverters with different units from a Philips TV that looked almost identical (same connectors for 24V input).
I didn't have the correct ribbon cable and using a CAT5 cable introduced too much resistance. So I instead created an extension cable for the right hand CCFL and then used short lengths of wire to connect the boards together (see attached), separated by plastic stand-offs.
The PCB design had nice copper pads that went to each pin which made connecting in this way quite easy and I'm sure nothing is shorted out. The extra wire in the picture is just a grounding wire as they old units were screwed to the chassis, which I can no longer do.
Problem :
The backlights now turn on for 2 seconds and aren't bright enough to light the whole screen (blackish area in the middle of screen). I've seen what it was like with the old inverters and it should be much, much brighter!
- Are the inverter boards simply not powerful enough? (the MOSFETs on the old boards do seem much bigger)
- Are the voltages just wrong for these CCFL units and I need to replace them with different ones?
Any ideas?
Comment