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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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punch amplifier part
A friend of mine has a Punch 200DSM car audio amp that is blown. He had
it mounted in his trunk and discovered his trunk had a leak when the amp blew. I've found 5 of the transistors that were toast and replaced them. I've also found a surface mount trasistor that is blown up but I can't find the info as to what exactly it is. I have the schematic and this shows the part is on a small "daughter board" labelled as HB4 WP-D039C. The schematic doesn't show the breakdown of this little "daughter board" though. The part itself is labelled 3BJ (the J is underlined). Anybody out there have any info which may help me out? Thanks in advance. Cheers, Lawrence |
#2
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Quote:
http://www.alldatasheet.com/datashee...M1100.3BJ.html |
#3
Posted to sci.electronics.repair
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punch amplifier part
Nope, it looks like your typical surface mount transistor with two
connections on one side a one connection on the opposite side. Thanks for the response though. Cheers, Lawrence |
#4
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Quote:
Thre should be some other markings on it - they may be very faint/faded. Try using a bright spot light to view the markings at an angle. |
#5
Posted to sci.electronics.repair
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punch amplifier part
"Lawrence" wrote in message ... A friend of mine has a Punch 200DSM car audio amp that is blown. He had it mounted in his trunk and discovered his trunk had a leak when the amp blew. I've found 5 of the transistors that were toast and replaced them. I've also found a surface mount trasistor that is blown up but I can't find the info as to what exactly it is. I have the schematic and this shows the part is on a small "daughter board" labelled as HB4 WP-D039C. The schematic doesn't show the breakdown of this little "daughter board" though. The part itself is labelled 3BJ (the J is underlined). Anybody out there have any info which may help me out? Thanks in advance. Cheers, Lawrence Probably a '3B' and the J may be a manufacturer's code. It's nothing special- according to my notes it's a BC856B, whose conventional equivalent is the humble BC556B. If there's space you could just graft a BC556B in its place. Dave |
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