pioneer sx1500td blowing fuse
Posts: 1,519
Threads: 69
Joined: Nov 2012
City: Kansas city, MO.
Well the problem seems to still be here. I hooked up main amp. with B+ and the Es for each side connected. Drawing over .7 amps at 65v. Tried each side of amp with one fuse removed also doing it on both sides. when I turned VR1 &2 to clockwise the amperage came down a little ccw caused it to climb. I did take a voltage reading of the two power transistors on one side of amp.The Q10 & Q12. this is the (out#2 side)
(Q10) BtoE +.743v) B to C neg. 1.5v) (Q12) B to E .630v) B to E 34v). They were getting very hot and I noticed the amperage on the meter had climbed to 1 amp so I turned off with out getting any more readings.
The power transistors I installed were from mouser (pn. 2n3442G)-10A 140V 117W NPN. The only thing I know to do now is wait for your advice on how to proceed.
Messages In This Thread
RE: pioneer sx1500td blowing fuse - by KCMike - 01-11-2015, 03:46 PM
Users browsing this thread: 1 Guest(s)
|
|
Recent Posts
|
|
HiFi (Chifi) tube amp build - but my own design.
|
| It's the other forum. I'm also in DIY, but mostly read there. Honestly, I kinda jumped into this without much thought to...TV MAN — 10:43 AM |
|
Philco 71 Code 125
|
| Hello,
I am in need of a schematic for this radio. Mine has the three separate circular tube shields and a shadow me...dconant — 08:06 AM |
|
Stromberg Carlson 1500 Squeal
|
| And life just keeps getting more complicated.dconant — 07:57 AM |
|
54C Complete Teardown/Rebuild
|
| Hello Roy,
here is this one
sincerely Richardradiorich — 12:45 AM |
|
54C Complete Teardown/Rebuild
|
| Richard,
Had grabbed it already but thank you just the same. I find myself wanting to find some way to block out the...glyphmon — 12:03 AM |
|
54C Complete Teardown/Rebuild
|
| Hello roy,
here is a link to the schematic .
Sincerely Richardradiorich — 11:54 PM |
|
54C Complete Teardown/Rebuild
|
| Richard,
The Silvertone 2014 also is a transformerless set, so I am incorporating a 1:1 600 ohm audio isolation transfo...glyphmon — 11:37 PM |
|
Preliminary work on wife's Silvertone 2014
|
| Did an alignment today which was interesting. IF alignment went great, almost all was already spot-on. Adjusting on th...glyphmon — 11:35 PM |
|
54C Complete Teardown/Rebuild
|
| The main problem with adding a Bluetooth input is that this set lacks a traditional power transformer to isolate it from...radiorich — 11:19 PM |
|
54C Cabinet Refinish
|
|
I started stripping this cabinet before it got super chilly out because I knew I wasn't going to be able to work on ...glyphmon — 11:18 PM |
|
Who's Online
|
There are currently 1665 online users. [Complete List]
» 1 Member(s) | 1664 Guest(s)
|
|
|
|
 
|
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
