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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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32" Citizen tv model:JCTV3245X,chassis:M3N520 (Orion) no 5v
32" Citizen stereo tv model:JCTV3245X,chassis:M3N520,UL Listed:289X
(Orion),year:Oct 2003.I noticed that two of the ground traces from the rear RCA input jacks were scortched (burnt) so I assume that the micro was hit a a surge and is loading down the 5v standby. No power (no 5v standby), I assume that IC101=Micro Orion # OEC7091B=80 pin (surface mounted IC) has it's VCC pin 78 loading down the 5v as when I unsolder the jumper trace coming from D511=5.1v zener diode the 5v comes back. I also noticed that OS101=IR receiver's pin 1 & 3 are not 5v but instead 2.7v I traced one of the pins going back to IC199=EEPROM's pin 8.I don't have the service manual and cannot download it as I am on slow dial up but there is a similar model he http://www.schematicsforfree.com/arc...20JCTV3242.PDF And for more free service manual downloads: http://www.schematicsforfree.mattsoft.net http://schematicsforfree.mattsoft.net http://schforfree.seedhost.com then click on "click here to see the files" followed by "video". I noticed that most of the new cheap tv's sold are basically this Orion chassis be 27" or 32" as this tv has the same vertical ouput IC of LA78041: Other part #'s for LA78041: Daewoo # 1LA78041 ECG Philips/ NTE # NTE7182 Funai # LA78041 ILO (Wal*Mart) # DG4565RT JVC # LA78041 Orion # 103TD80410 Philips # 4835 209 47605 Sanyo (Aiwa) # 409 453 5905 Sony # 9-885-060-76 Toshiba # AD300414 Toshiba # 72794507 Toshiba old # BZ611118 Zenith # 905-10653 Therefore you techs probably worked on this Orion chassis rebranded or badged as Electrohome,Toshiba,Philips and others. Anyone have any common repair tips? or can verify that IC101 is the culprit and what other part #'s are used for this micro?.I need as many other OEM part #'s for it. Thanks in advance. Sidney E-mail:sidneybek(at)yahoo.com Dartmouth,Nova Scotia Canada |
#2
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32" Citizen tv model:JCTV3245X,chassis:M3N520 (Orion) no 5v
wrote in message oups.com... 32" Citizen stereo tv model:JCTV3245X,chassis:M3N520,UL Listed:289X (Orion),year:Oct 2003.I noticed that two of the ground traces from the rear RCA input jacks were scortched (burnt) so I assume that the micro was hit a a surge and is loading down the 5v standby. No power (no 5v standby), I assume that IC101=Micro Orion # OEC7091B=80 pin (surface mounted IC) has it's VCC pin 78 loading down the 5v as when I unsolder the jumper trace coming from D511=5.1v zener diode the 5v comes back. is the zener shorted ? pulling down the 5 volt line? |
#3
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32" Citizen tv model:JCTV3245X,chassis:M3N520 (Orion) no 5v
Sidney, these Orion designs have the highest failure micro I've ever
seen, whether it's Orion, Toshiba or whatever. You can spend hours hoping that it's not, but it almost always is. I've gone thru at least a dozen this year alone and have two here waiting for approval. I despise the prospect of removing and installng an 80 pin SMD device but, price it accordingly. It still pays the bills. www.techdata-kicksass.net |
#4
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32" Citizen tv model:JCTV3245X,chassis:M3N520 (Orion) no 5v
Thanks Terry H,I appreciate it.
Sidney Dartmouth,Nova Scotia Canada Tech Data wrote: Sidney, these Orion designs have the highest failure micro I've ever seen, whether it's Orion, Toshiba or whatever. You can spend hours hoping that it's not, but it almost always is. I've gone thru at least a dozen this year alone and have two here waiting for approval. I despise the prospect of removing and installng an 80 pin SMD device but, price it accordingly. It still pays the bills. www.techdata-kicksass.net |
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