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.

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
Posted to sci.electronics.repair
The Boz
 
Posts: n/a
Default Service Manual/Full Schematic for Biddle BM10 Megger

Hey all,

I'm looking for something to help me repair a Biddle BM10 megger.
Capacitor C-16 has mechanical damage and requires replacement, I think
several of the 1N5400 diodes are bad I need a better capacitance meter
to troubleshoot further - I'm working on that. I have other questions a
schematic would help with.

TIA,

Boz
  #2   Report Post  
Posted to sci.electronics.repair
The Boz
 
Posts: n/a
Default Service Manual/Full Schematic for Biddle BM10 Megger

I removed the 1N5400s, they tested fine when isolated. Probably a
Huntron would have helped in that regard.

Perhaps someone has suggestions on testing TO-92-cased transistors in
circuit? I've Googled it but find ambiguous, sometimes confusing
instructions. One method even said it of itself, it was potentially
destructive...yikes.

The Boz
  #3   Report Post  
Posted to sci.electronics.repair
Asimov
 
Posts: n/a
Default Service Manual/Full Schematic for Biddle BM10 Megger

"The Boz" bravely wrote to "All" (26 Nov 05 22:12:07)
--- on the heady topic of " Service Manual/Full Schematic for Biddle BM10 Megger"

TB From: The Boz
TB Xref: core-easynews sci.electronics.repair:349653

TB I removed the 1N5400s, they tested fine when isolated. Probably a
TB Huntron would have helped in that regard.

TB Perhaps someone has suggestions on testing TO-92-cased transistors in
TB circuit? I've Googled it but find ambiguous, sometimes confusing
TB instructions. One method even said it of itself, it was potentially
TB destructive...yikes.


To test the TO-92 transistors in-circuit just use a dmm on diode
function to test the junctions. If you want to be thorough, then
isolate 2 of the 3 transistor terminals to run a hfe gain test. I
haven't met a TO-92 transistor I couldn't desolder using a solder pump
or a solder wick.

A*s*i*m*o*v

.... Letterman of Borg - "Ok, Top 10 reasons why resistance is futile:"

  #4   Report Post  
Posted to sci.electronics.repair
Andrew Tweddle
 
Posts: n/a
Default Service Manual/Full Schematic for Biddle BM10 Megger

The Boz wrote:

I removed the 1N5400s, they tested fine when isolated. Probably a
Huntron would have helped in that regard.

Perhaps someone has suggestions on testing TO-92-cased transistors in
circuit? I've Googled it but find ambiguous, sometimes confusing
instructions. One method even said it of itself, it was potentially
destructive...yikes.

The Boz

One instrument that I use on occasion is a "Supercricket".
It will test transistor gain incircuit.The other method is the back to
back diode check with a multimeter.Not quite as reliable and not always
useful on FET's.

Andrew
Reply
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
[Fwd: Tensor UPS t100 / t120 schematic or service manual needed] ronen tirrer Electronics 0 April 22nd 04 09:31 AM
WTD: Micro now 716 schematic or service manual gcd Electronics Repair 0 November 8th 03 02:13 AM
REQ: Schematic or service manual for Iiyama VM Pro 502 (A102GT) Hellraiser Electronics Repair 0 October 11th 03 07:31 PM
Panasonic "CT-27SL13" TV Service Mode, Please! Lance Dyer Electronics Repair 0 September 16th 03 05:18 AM
SONY poor service Eric Electronics Repair 2 September 10th 03 05:28 AM


All times are GMT +1. The time now is 08:57 AM.

Powered by vBulletin® Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 DIYbanter.
The comments are property of their posters.
 

About Us

"It's about DIY & home improvement"