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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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#1
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Viewsonic P220f dead
I got this 22" monitor, its got the same problem with the opto-isolator i
seen going around. this monitor has more severe damage done to it though. I see several electrolytics that have popped open. around the power supply, vertical IC, and one on the neck board, couple in the HV section. the HOT and damper test ok. the power will not come on, it just cycles. there is a large 15-pin IC on the CRT neck board that is exploaded and unreadable. Does anyone know what the part number of this IC is? I can definately tell you its not LM2412, this one is 15 pin, different package style. its white and split open from smoke and fire. im assuming all the caps, this IC, and the vertical parts will need replacing, along with the opto. any ideas? |
#2
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Viewsonic P220f dead
Mike wrote:
I got this 22" monitor, its got the same problem with the opto-isolator i seen going around. this monitor has more severe damage done to it though. I see several electrolytics that have popped open. around the power supply, vertical IC, and one on the neck board, couple in the HV section. the HOT and damper test ok. the power will not come on, it just cycles. there is a large 15-pin IC on the CRT neck board that is exploaded and unreadable. Does anyone know what the part number of this IC is? I can definately tell you its not LM2412, this one is 15 pin, different package style. its white and split open from smoke and fire. im assuming all the caps, this IC, and the vertical parts will need replacing, along with the opto. any ideas? Unfortunately I no longer have one of these to look at for the numbers but what's the deal? I've fixed at least half a dozen Viewsonics with the bad opto and probably more than that. I've never had one come back after I fixed it, did they just get a bad batch of optos? |
#3
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Viewsonic P220f dead
apparently this one has the same problem. bad run i guess.
I REALLY need that part number of the chip, bolted to the heatsink of the CRT neck board. mine is white and toasted crispy. "James Sweet" wrote in message news:LLSEg.65930$u05.47272@trnddc01... Mike wrote: I got this 22" monitor, its got the same problem with the opto-isolator i seen going around. this monitor has more severe damage done to it though. I see several electrolytics that have popped open. around the power supply, vertical IC, and one on the neck board, couple in the HV section. the HOT and damper test ok. the power will not come on, it just cycles. there is a large 15-pin IC on the CRT neck board that is exploaded and unreadable. Does anyone know what the part number of this IC is? I can definately tell you its not LM2412, this one is 15 pin, different package style. its white and split open from smoke and fire. im assuming all the caps, this IC, and the vertical parts will need replacing, along with the opto. any ideas? Unfortunately I no longer have one of these to look at for the numbers but what's the deal? I've fixed at least half a dozen Viewsonics with the bad opto and probably more than that. I've never had one come back after I fixed it, did they just get a bad batch of optos? |
#4
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Viewsonic P220f dead
On Thu, 17 Aug 2006 18:13:38 GMT "Mike" wrote in
Message id: : apparently this one has the same problem. bad run i guess. I REALLY need that part number of the chip, bolted to the heatsink of the CRT neck board. mine is white and toasted crispy. You might try getting a service manual, it's only 16 bucks: http://www.manuals-in-pdf.com/p220f-p-110975.html |
#5
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Viewsonic P220f dead
if someone that already has a service manual, and can rattle off the number
of that part number, that would be REALLY helpfull... "Mike" wrote in message . .. I got this 22" monitor, its got the same problem with the opto-isolator i seen going around. this monitor has more severe damage done to it though. I see several electrolytics that have popped open. around the power supply, vertical IC, and one on the neck board, couple in the HV section. the HOT and damper test ok. the power will not come on, it just cycles. there is a large 15-pin IC on the CRT neck board that is exploaded and unreadable. Does anyone know what the part number of this IC is? I can definately tell you its not LM2412, this one is 15 pin, different package style. its white and split open from smoke and fire. im assuming all the caps, this IC, and the vertical parts will need replacing, along with the opto. any ideas? |
#6
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Viewsonic P220f dead
The only IC i found that matches the same package, and pinouts, is the sanyo
VPS13. problem is, Where do i find this IC? "Mike" wrote in message . .. I got this 22" monitor, its got the same problem with the opto-isolator i seen going around. this monitor has more severe damage done to it though. I see several electrolytics that have popped open. around the power supply, vertical IC, and one on the neck board, couple in the HV section. the HOT and damper test ok. the power will not come on, it just cycles. there is a large 15-pin IC on the CRT neck board that is exploaded and unreadable. Does anyone know what the part number of this IC is? I can definately tell you its not LM2412, this one is 15 pin, different package style. its white and split open from smoke and fire. im assuming all the caps, this IC, and the vertical parts will need replacing, along with the opto. any ideas? |
#7
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Viewsonic P220f dead
On Sun, 20 Aug 2006 20:44:44 GMT "Mike" wrote in
Message id: : The only IC i found that matches the same package, and pinouts, is the sanyo VPS13. problem is, Where do i find this IC? http://www.bdent.com/search/part.jsp?partnum=VPS13G |
#8
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Viewsonic P220f dead
WEEEE. $40 bux for that chip.
ill just build one out of discrete components, considering I have a ton on hand, and the datasheet of that IC shows the equiv schematic. "JW" wrote in message ... On Sun, 20 Aug 2006 20:44:44 GMT "Mike" wrote in Message id: : The only IC i found that matches the same package, and pinouts, is the sanyo VPS13. problem is, Where do i find this IC? http://www.bdent.com/search/part.jsp?partnum=VPS13G |
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