Badcaps.net Forum
Go Back   Badcaps Forums > Troubleshooting Hardware & Devices and Electronics Theory > General Electronics Technical Discussion
Register FAQ Calendar Search Today's Posts Mark Forums Read

 
Thread Tools Display Modes
Old 01-13-2022, 07:46 AM   #1
alltvrepairs
Member
 
Join Date: Jan 2014
City & State: Malta
My Country: Malta
I'm a: Knowledge Seeker
Posts: 48
Default (Multiple Spark Discharge) MSD 6AL Q204 required

Hi,

Am after the part number for this unit used in an old Ford Capri for boosting spark ignition.

Unit is MSD6AL and Q204 is the damaged part.
If I can figure out at least if it is a Mosfet type or Bipolar Transistor like MJE3055T as used in older Models.

Any help appreciated!
Attached Images
File Type: jpg CM220113-135240001.jpg (360.2 KB, 15 views)
File Type: jpg 20220113_133833.jpg (359.2 KB, 13 views)
File Type: jpg 20220113_133823.jpg (355.1 KB, 9 views)
alltvrepairs is offline   Reply With Quote
Old 01-13-2022, 09:05 AM   #2
stj
Great Sage 齊天大聖
 
stj's Avatar
 
Join Date: Dec 2009
City & State: Europe
My Country: some shithole run by Israeli agents
I'm a: Professional Tech
Posts: 26,441
Default Re: (Multiple Spark Discharge) MSD 6AL Q204 required

try cleaning it.
what are the others on that pcb edge?
stj is offline   Reply With Quote
Old 01-13-2022, 10:56 AM   #3
alltvrepairs
Member
 
Join Date: Jan 2014
City & State: Malta
My Country: Malta
I'm a: Knowledge Seeker
Posts: 48
Default Re: (Multiple Spark Discharge) MSD 6AL Q204 required

I think it is a N Channel Mosfet as marked with Mitsubishi Logo and starts with
FS7........
FS70KM-2 VDss 100v, Id 70A looks a good contender.

http://pdf.datasheetcatalog.com/data...on/mXrqvuq.pdf

According to Transformer thick windings that is switched solely from this Q240, 70A seems reasonable.
This winding is 1 side 12v and the other switchable by Q240 so 100v is also in range.

What do you think?
Attached Images
File Type: jpg CM220113-173724002.jpg (276.1 KB, 12 views)
alltvrepairs is offline   Reply With Quote
Old 01-13-2022, 05:31 PM   #4
redwire
Badcaps Veteran
 
Join Date: Dec 2010
City & State: Alberta
My Country: Canada
Posts: 2,471
Default Re: (Multiple Spark Discharge) MSD 6AL Q204 required

From another MSD 6AL repair blurb:

TC4627 has voltage-doubler 2.2uF tantalum caps that fail.
BUP213 IGBT 1,200V 32A or IRG4PH40K
FS70KM or IRF1010E if you add insulator.

FS70KM-02 is 100V 70A 20mR
FS70KM-06 is 60V 70A 7.5mR
IRF1010E is 60V 84A 12mR

Plastic TO-220 fullpack aren't great at getting rid of heat. The 1N5244A zener apparently can go too if the mosfet shorts.
Higher voltage mosfets have higher RDS on, which will make them run hotter.
redwire is offline   Reply With Quote
Old 03-08-2022, 07:50 AM   #5
alltvrepairs
Member
 
Join Date: Jan 2014
City & State: Malta
My Country: Malta
I'm a: Knowledge Seeker
Posts: 48
Default Re: (Multiple Spark Discharge) MSD 6AL Q204 required

Quote:
Originally Posted by redwire View Post
From another MSD 6AL repair blurb:

TC4627 has voltage-doubler 2.2uF tantalum caps that fail.
BUP213 IGBT 1,200V 32A or IRG4PH40K
FS70KM or IRF1010E if you add insulator.

FS70KM-02 is 100V 70A 20mR
FS70KM-06 is 60V 70A 7.5mR
IRF1010E is 60V 84A 12mR

Plastic TO-220 fullpack aren't great at getting rid of heat. The 1N5244A zener apparently can go too if the mosfet shorts.
Higher voltage mosfets have higher RDS on, which will make them run hotter.
Sorry for late reply as just noticed you replied. Many thanks for your feedback. I will post update hopefully very soon!
alltvrepairs is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



Badcaps.net Technical Forums 2003 - 2022
Powered by vBulletin ®
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.
All times are GMT -6. The time now is 05:12 PM.
Did you find this forum helpful?