milanomike
Well-Known Member
On my 2230, I believe a transistor has gone out creating ugly noise thru the left channel. This is on the P400 board. So, I've decided to replace all 8 transistors (and caps once I verify it works), but I am not savvy enough to sort thru and determine equivalent replacements. I've read tons of threads but have not clearly identified replacements. Do the transistors need to be matched for this board?
Finally, my board appears to be mislabeled, I have attached a photo of the board, hope it shows OK. There are 2 H402's shown (on left and right with left being top in the photo) by studying the parts list I believe the H402 on the right should be H403 (2SA493GR) and the H403 or the left (top) should be H404 (2SA493GR). I base this on logic from the other channel on the board. Does this make sense?
H401 - 2SC1000BL
H402 - 2SC1000BL
H402 right side should be H403 or 2SA493GR
H403 left side should be H404 or 2SA493GR
H405 - 2SC1000BL
H406 - 2SC1000BL
H407 - 2SA493GR
H408 - 2SA493GR
I need to identify the correct equivalents here so any help is appreciated. Don't want this post to be too long, so cap question saved until I sort this out. Thanks.
Mike
t
Finally, my board appears to be mislabeled, I have attached a photo of the board, hope it shows OK. There are 2 H402's shown (on left and right with left being top in the photo) by studying the parts list I believe the H402 on the right should be H403 (2SA493GR) and the H403 or the left (top) should be H404 (2SA493GR). I base this on logic from the other channel on the board. Does this make sense?
H401 - 2SC1000BL
H402 - 2SC1000BL
H402 right side should be H403 or 2SA493GR
H403 left side should be H404 or 2SA493GR
H405 - 2SC1000BL
H406 - 2SC1000BL
H407 - 2SA493GR
H408 - 2SA493GR
I need to identify the correct equivalents here so any help is appreciated. Don't want this post to be too long, so cap question saved until I sort this out. Thanks.
Mike
t