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Alpine 3545 blows all fuses after 5 seconds of power
Alpine 3545 blows all fuses after 5 seconds of power
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Old 25th November 2017, 01:48 AM   #21
bmore5077 is offline bmore5077  United States
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More awesome info. Thanks again
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Old 26th November 2017, 04:15 PM   #22
bmore5077 is offline bmore5077  United States
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I found a place in pa that has the transistor I pulled that was bad. Here is the link
2SC3182
Is that company reputable. Thanks
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Old 26th November 2017, 04:37 PM   #23
Perry Babin is offline Perry Babin  United States
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I've used them a few times and haven't had any problems.

You can't replace only one of the outputs. At the very least, you have to replace all 3 of the same part number in that channel.

Also confirm that all 3 emitter resistors for those transistors are within tolerance.
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Old 26th November 2017, 05:00 PM   #24
bmore5077 is offline bmore5077  United States
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Will do....figured I'd do all 3 as well. I looked at the part numbers you gave me. The transistor that was bad was npn,,you gave me part numbers for npn and pnp. What would you replace if I go to the new part numbers you gave me. Thanks
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Old 26th November 2017, 05:09 PM   #25
Perry Babin is offline Perry Babin  United States
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I would replace all 6 in that channel. There is a very slight chance that the alternate part number parts could be incompatible but I've never had a problem with them.

Find the other problems (hissing, leaky caps..) before buying output transistors.
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Old 26th November 2017, 05:15 PM   #26
bmore5077 is offline bmore5077  United States
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Will do... thanks
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Old 27th November 2017, 12:06 AM   #27
bmore5077 is offline bmore5077  United States
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Hello I looked closer at the caps and it looks like these are maybe the filter caps but these look like maybe they leaked. It not gooey.. it's crusty but looks more black then brown. Was trying to find replacements but these are vt (m) stamped which looks to be obsolete. I attached a picture for advice. Thanks
Attached Images
File Type: jpg 20171126_183608.jpg (981.4 KB, 58 views)
File Type: jpg 20171126_183555.jpg (838.5 KB, 55 views)
File Type: jpg 20171126_200912.jpg (772.9 KB, 56 views)

Last edited by bmore5077; 27th November 2017 at 12:10 AM.
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Old 27th November 2017, 12:22 AM   #28
Perry Babin is offline Perry Babin  United States
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I would remove that fixative. The caps are likely OK.
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Old 28th November 2017, 10:59 PM   #29
bmore5077 is offline bmore5077  United States
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Ok so I tried to do adjustment from service manual. Was able to adjust supply voltage to 104 but idle current I'm getting zero on both test points. Not sure if I'm doing something wrong or what. The bad transistor is stil removed from circuit board if that matters.
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Old 28th November 2017, 11:03 PM   #30
Perry Babin is offline Perry Babin  United States
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Check for audio. Measure across the speaker terminals for each channel to confirm that the DC voltage is well under 1v. If so, connect a speaker to one channel at a time to see if it's producing clean audio.
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