amiga.org
     
iconAll times are GMT -6. The time now is 04:30 PM. | Welcome to Forum, please register to access all of our features.

Amiga.org Amiga computer related discussion Amiga Hardware Issues and discussion battery replacement question

Amiga Hardware Issues and discussion This forum is dedicated to the discussion and resolution of issues related to Classic and Next Generation Amiga hardware. Got a problem with a piece of hardware? Click to speak.

Reply
 
Thread Tools Display Modes
Old 11-20-2011, 04:51 PM   #21
Castellen
Cult Member
Points: 10,837, Level: 68 Points: 10,837, Level: 68 Points: 10,837, Level: 68
Activity: 4% Activity: 4% Activity: 4%
 
Join Date: Feb 2002
Location: New Zealand
Posts: 972
Default Re: battery replacement question

Quote:
Originally Posted by Tygre View Post
Hi Castellen!
Could you post or send me the schematics, the battery works but the "Save" button is ghosted so something must be wrong...

Tygre

A revival of a 2003 thread; talk about scraping off the dust!

Anyway, you'll find all the information you need on my webserver here.
Castellen is offline   Reply With Quote
Old 11-20-2011, 07:02 PM   #22
Tygre
Merely Curious
Points: 7,860, Level: 59 Points: 7,860, Level: 59 Points: 7,860, Level: 59
Activity: 8% Activity: 8% Activity: 8%
 
Tygre's Avatar
 
Join Date: Jun 2003
Posts: 18
Default Re: battery replacement question

Quote:
Originally Posted by Castellen View Post
A revival of a 2003 thread; talk about scraping off the dust!

Anyway, you'll find all the information you need on my webserver here.
Isn't it cool ;-) That really tells something about the Internet never forgetting (forgiving?) anything...

Anyway, thanks a lot for the link! I am going to check it out and I'll keep you posted (hopefully in less than 8 years...)

Cheers!
Tygre
Tygre is offline   Reply With Quote
Old 11-20-2011, 09:04 PM   #23
Tygre
Merely Curious
Points: 7,860, Level: 59 Points: 7,860, Level: 59 Points: 7,860, Level: 59
Activity: 8% Activity: 8% Activity: 8%
 
Tygre's Avatar
 
Join Date: Jun 2003
Posts: 18
Default Re: battery replacement question

Quote:
Originally Posted by Castellen View Post
A revival of a 2003 thread; talk about scraping off the dust!

Anyway, you'll find all the information you need on my webserver here.
I started to check the resistance measurements of the U177 following your great page and here are my results so far:

Code:
Resistance measurements on U177 (latch)
Pin 1 	1k ohm between pin 1 and 16 (+5V)            OK
Pin 2 	10k to ground,                               5k
        connects to U178 pin 7                       NO
Pin 3 	2.5-3k to ground,                            10k
        connects to U175 pin 6
Pin 4 	2.5-3k to ground,                            10k
        connects to U175 pin 7
Pin 5 	10k to ground,                               4k
        connects to U178 pin 6                       5k
Pin 6 	2.5-3k to ground,                            2k
        connects to U175 pin 8
Pin 7 	10k to ground,                               2.5k
        connects to U178 pin 5                       YES
Pin 8 	less than 1 ohm (approx) to ground           OK
Pin 9 	High resistance (greater than 1M ohm),       3.5k
        connects to U150 pin 72 (via 47 ohms)
Pin 10 	10k to ground,                               3k
        connects to U178 pin 4                       YES
Pin 11 	2.5-3k to ground,                            NO
        connects to U175 pin 9
Pin 12 	not connected
Pin 13 	not connected
Pin 14 	not connected
Pin 15 	not connected
Pin 16 	Less than 1 ohm (approx) between U975/U976
        (located next to U177) pin 16 (+5V)
So, it seems that either I am missing something or my U177 is really destroyed! What do you think? What else could I test to find what is wrong (including me!) to get back my clock :-)

Cheers!
Tygre
Tygre is offline   Reply With Quote
Reply

Bookmarks

Tags
battery , question , replacement

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Battery replacement Marcb Amiga Hardware Issues and discussion 8 06-09-2013 08:15 PM
Amiga battery replacement? wa9yoz General chat about Amiga topics 4 08-21-2008 08:50 AM
Blizzardppc battery replacement, how to remove battery? Bazzaq Amiga Hardware Issues and discussion 4 01-12-2007 06:01 PM
Battery replacement?? aggro_mix Amiga Hardware Issues and discussion 39 09-24-2004 04:05 AM
Battery Replacement Prmetime Amiga Hardware Issues and discussion 2 11-25-2003 07:12 PM