Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems.

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Pierre Merriaux
 
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Default [IIYAMA] vision master pro 450 A901HT

Hi,

I have a dead CRT from Iiyama but all parts are manufactured by
mitsubishi.
Symptoms : After power on, the screen light its led for 1/2 - 1 second
then turn off this led.
After a little investigation, I noticed that when I unplug a cable from
the main board (near a microcontroller) to the little board connected to the
CRT, the led stay on.

Anyone have seen this before ?

Perhaps some of you have an appropriate schematic (or service manual) for
this screen or for the same type of screen from mitsubishi.

I took some pictures : http://lerhu.free.fr/iiyama

Thanks,




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Dave D
 
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Default [IIYAMA] vision master pro 450 A901HT


"Pierre Merriaux" wrote in message
...
Hi,

I have a dead CRT from Iiyama but all parts are manufactured by
mitsubishi.
Symptoms : After power on, the screen light its led for 1/2 - 1 second
then turn off this led.
After a little investigation, I noticed that when I unplug a cable from
the main board (near a microcontroller) to the little board connected to

the
CRT, the led stay on.

Anyone have seen this before ?

Perhaps some of you have an appropriate schematic (or service manual) for
this screen or for the same type of screen from mitsubishi.

I took some pictures : http://lerhu.free.fr/iiyama

Thanks,





There's not much to go on, it could be a failed HOT, a PSU fault or heaven
knows what else. One thing for certain, powering on your monitor with
unplugged connectors is asking for a whole load of trouble.

Dave


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Hellraiser
 
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Default [IIYAMA] vision master pro 450 A901HT

This may be of use:

http://home.clara.net/adrian-smith31...ips.htm#Iiyama

Hellraiser..........

"Pierre Merriaux" wrote in message
...
Hi,

I have a dead CRT from Iiyama but all parts are manufactured by
mitsubishi.
Symptoms : After power on, the screen light its led for 1/2 - 1 second
then turn off this led.
After a little investigation, I noticed that when I unplug a cable from
the main board (near a microcontroller) to the little board connected to

the
CRT, the led stay on.

Anyone have seen this before ?

Perhaps some of you have an appropriate schematic (or service manual) for
this screen or for the same type of screen from mitsubishi.

I took some pictures : http://lerhu.free.fr/iiyama

Thanks,






  #4   Report Post  
Hellraiser
 
Posts: n/a
Default [IIYAMA] vision master pro 450 A901HT

"Pierre Merriaux" wrote in message
...
Hi,

I have a dead CRT from Iiyama but all parts are manufactured by
mitsubishi.
Symptoms : After power on, the screen light its led for 1/2 - 1 second
then turn off this led.
After a little investigation, I noticed that when I unplug a cable from
the main board (near a microcontroller) to the little board connected to

the
CRT, the led stay on.

Anyone have seen this before ?

Perhaps some of you have an appropriate schematic (or service manual)

for
this screen or for the same type of screen from mitsubishi.

I took some pictures : http://lerhu.free.fr/iiyama


Incidentally, on a slightly different note, if any of you have a Vision
Master Pro 510 (A201HT) that powers on but gives no picture, replace the
2SC5570 (Q503 I think it is) and the fusible resistor R561. Worked fine for
me, I'm now enjoying 20" of flat screened loveliness

Hellraiser............


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