The value of the control might be marked on the board too so you could use that
as a guide.
Sent from my iPhone
> On Oct 29, 2022, at 13:15, Wayne S wrote:
>
> One thought is that the brightness control might be heating up and changing
> value. You can check the controls easily with a ohm
One thought is that the brightness control might be heating up and changing
value. You can check the controls easily with a ohm meter. Check ohms across
the control when cold, disconnect ohm meter and plug in the machine until it
goes white. Then disconnect and measure across the control again.
> Is there any kind of brightness control? Does it work at all when the screen
> goes white?
There are brightness and contrast controls, but they don't seem to do anything
even when the screen is working properly. (Note that this could simply be an
issue with the physical controls themselves
Is there any kind of brightness control? Does it work at all when the screen
goes white?
Sent from my iPhone
> On Oct 29, 2022, at 12:56, Cameron Kaiser via cctalk
> wrote:
>
>
>>
>> This usually means the timer of the pulse width modulation circuit is
>> changing.
>> If it’s an RC type
> This usually means the timer of the pulse width modulation circuit is
> changing.
> If it’s an RC type circuit, probably the resistor is heating up and changing
> value. If it’s a ic that controls the PWM then check out the IC and the
> components that connect to the control pin.
That's an
This usually means the timer of the pulse width modulation circuit is changing.
If it’s an RC type circuit, probably the resistor is heating up and changing
value. If it’s a ic that controls the PWM then check out the IC and the
components that connect to the control pin.
Sent from my iPhone
>
> I've been trying to do a little work on the RDI BriteLite IPX I have here, but
> when it runs more than a few minutes the LCD just blanks out white. The
> machine
> seems to still respond to commands, so it seems like it's something with the
> display hardware. Even powered off and back on it
