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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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48" RCA projection tv model:PJR500SR no video
48" RCA projection tv model:PJR500SR,chassis:Hitachi # VP3X,year:March
1983.The tv has audio,and from time to time the picture comes in and it is perfect so I know that the three crt's and their Glycol Ethylene coolants are fine,but when the picture is absent there is no video so I don't know if the problem is HV or video related. I looked everywheres for common repair tips but found none,I have not yet gone to the customers house but would like to know which part/s are defective before I head there. I don't usually do service calls nor do I usually repair projection tv's but my car requires serious frame and body work so a customer of mine decided to trade services at my request so I am purchasing the parts for the tv and my car,hence my lack of technical detail of measurements taken and the like. I appreciate your responses. Sidney E-mail:sidneybekyahoo.com |
#2
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48" RCA projection tv model:PJR500SR no video
Set probably has a bad ceramic horizontal/vertical module. This was a very
common failure and the symptom fits. Part has not been available for around 10 years. You might be able to confirm this by carefully tapping on the module. It is nearly impossible to resolder on the module due to the heatsinking capabilities of the substrate without damaging the components. David Sidney wrote in message om... 48" RCA projection tv model:PJR500SR,chassis:Hitachi # VP3X,year:March 1983.The tv has audio,and from time to time the picture comes in and it is perfect so I know that the three crt's and their Glycol Ethylene coolants are fine,but when the picture is absent there is no video so I don't know if the problem is HV or video related. I looked everywheres for common repair tips but found none,I have not yet gone to the customers house but would like to know which part/s are defective before I head there. I don't usually do service calls nor do I usually repair projection tv's but my car requires serious frame and body work so a customer of mine decided to trade services at my request so I am purchasing the parts for the tv and my car,hence my lack of technical detail of measurements taken and the like. I appreciate your responses. Sidney E-mail:sidneybekyahoo.com |
#3
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48" RCA projection tv model:PJR500SR no video
The module, if needed, is still available and in stock at
www.tritronicsinc.com Hitachi Part number is 2370542 (HM7052) Usually, however, replacing the caps around that module will usually result in a successful repair. There will also be quite a few old dried out caps in the power supply as well as the deflection/high voltage circuits in need of replacement. Good Luck, Bill Jr "David" wrote in message ... Set probably has a bad ceramic horizontal/vertical module. This was a very common failure and the symptom fits. Part has not been available for around 10 years. You might be able to confirm this by carefully tapping on the module. It is nearly impossible to resolder on the module due to the heatsinking capabilities of the substrate without damaging the components. David Sidney wrote in message om... 48" RCA projection tv model:PJR500SR,chassis:Hitachi # VP3X,year:March 1983.The tv has audio,and from time to time the picture comes in and it is perfect so I know that the three crt's and their Glycol Ethylene coolants are fine,but when the picture is absent there is no video so I don't know if the problem is HV or video related. I looked everywheres for common repair tips but found none,I have not yet gone to the customers house but would like to know which part/s are defective before I head there. I don't usually do service calls nor do I usually repair projection tv's but my car requires serious frame and body work so a customer of mine decided to trade services at my request so I am purchasing the parts for the tv and my car,hence my lack of technical detail of measurements taken and the like. I appreciate your responses. Sidney E-mail:sidneybekyahoo.com |
#4
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48" RCA projection tv model:PJR500SR no video
Double checked Tritronics as we tried to order one late last year and
they came back with NLA. Tritronics web site shows NLA even now. David "Bill Jr" wrote in message om... The module, if needed, is still available and in stock at www.tritronicsinc.com Hitachi Part number is 2370542 (HM7052) Usually, however, replacing the caps around that module will usually result in a successful repair. There will also be quite a few old dried out caps in the power supply as well as the deflection/high voltage circuits in need of replacement. Good Luck, Bill Jr "David" wrote in message ... Set probably has a bad ceramic horizontal/vertical module. This was a very common failure and the symptom fits. Part has not been available for around 10 years. You might be able to confirm this by carefully tapping on the module. It is nearly impossible to resolder on the module due to the heatsinking capabilities of the substrate without damaging the components. David Sidney wrote in message om... 48" RCA projection tv model:PJR500SR,chassis:Hitachi # VP3X,year:March 1983.The tv has audio,and from time to time the picture comes in and it is perfect so I know that the three crt's and their Glycol Ethylene coolants are fine,but when the picture is absent there is no video so I don't know if the problem is HV or video related. I looked everywheres for common repair tips but found none,I have not yet gone to the customers house but would like to know which part/s are defective before I head there. I don't usually do service calls nor do I usually repair projection tv's but my car requires serious frame and body work so a customer of mine decided to trade services at my request so I am purchasing the parts for the tv and my car,hence my lack of technical detail of measurements taken and the like. I appreciate your responses. Sidney E-mail:sidneybekyahoo.com |
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