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Search found 13 matches

by billymm
Thu Oct 15, 2009 9:11 am
Forum: ThinkPad T4x Series
Topic: Charge Circuit - Physical location of TPC8203 on mb
Replies: 4
Views: 2086

Re: Charge Circuit - Physical location of TPC8203 on mb

After tracing the board I found that the fet used on a t40 is a FDS6990A (Q4) (not a TPC8203), located on the underside of the m/b near the L5 inductor

.... maybe this will help others

billy 8)
by billymm
Thu Oct 08, 2009 10:31 pm
Forum: ThinkPad T4x Series
Topic: Charge Circuit - Physical location of TPC8203 on mb
Replies: 4
Views: 2086

Charge Circuit - Physical location of TPC8203 on mb

Hi all, I recently got hold of the t41_block_01_v1.1.pdf charging block diagram for the t41 - huge thanx to whoever did it It can be found here Ive got a t40 & was looking for the two TPC8203 fets on the mb. Based on t41_block_01_v1.1.pdf the only fets I can see near the ADP3806 are 2x TPC8014 & a T...
by billymm
Sun Jul 20, 2008 8:22 pm
Forum: ThinkPad T4x Series
Topic: T41p Battery not charging -Interesting Cause
Replies: 1
Views: 1029

definitely....... nice tip

Although it is a pain to pull everything apart to get to it.....lol ;-)
by billymm
Wed Apr 23, 2008 2:57 am
Forum: ThinkPad T4x Series
Topic: GUIDE: Reflow GPU fix - 56K WARNING!!!
Replies: 255
Views: 562848

I did this reflow method to my t40/p & its been working great for close to 6 months now....

I got hold of a GMC heat gun with temp settings on it which means once it was set I didnt have to worry about checking wiht thermometer..............

just my 2 cents - dont rush the procedure described above
by billymm
Wed Apr 23, 2008 2:53 am
Forum: ThinkPad T4x Series
Topic: Is it possible to slow my fan speed down?
Replies: 14
Views: 2158

if you pull the fan out try a little switch cleaner lubricant on fan bearing

.... some fans make hideous noises

just a side note - wouldn't slowing down the fan increase the heat on the sink as its not removing it as quickly??
by billymm
Mon Apr 21, 2008 8:02 pm
Forum: ThinkPad T4x Series
Topic: T42 blown Fuse *PIC*
Replies: 16
Views: 34463

Hi all,

I was just wondering does anyone know what those 3 green things are in the bottom left of the pic that Robbyrobot kindly supplied?
by billymm
Thu Apr 17, 2008 10:09 am
Forum: ThinkPad T4x Series
Topic: T40 Battery Not Charging but runs fine from AC
Replies: 8
Views: 3055

I checked all 3 & they arent blown
by billymm
Thu Apr 17, 2008 10:02 am
Forum: ThinkPad T4x Series
Topic: T40 Battery Not Charging but runs fine from AC
Replies: 8
Views: 3055

Hi, thanx for the help.

Do you mean the 2 directly behind the battery connector (on the top of the pcb) or the one with "10" written on it on the underside of the pcb?
by billymm
Thu Apr 17, 2008 8:19 am
Forum: ThinkPad T4x Series
Topic: T40 Battery Not Charging but runs fine from AC
Replies: 8
Views: 3055

........after a lot of searching I found out that the charging circuit is basically a couple of mosfets (TPC8109 & TPC8014) & a battery charger ic (ADP3806) I hope this helps others who are looking for this info Does anyone know where to buy either of these components as I was told the adp3806 is ou...
by billymm
Tue Oct 23, 2007 3:05 am
Forum: ThinkPad T4x Series
Topic: New RULES of this ROAD - Member comments solicited :-)
Replies: 23
Views: 14580

In addition to DenverBrian's idea of not allowing subject lines to be one work or too short.

Is to make them descriptive by model, area of problem, problem
for eg "T40p-HDD-makes squeaky noise on boot"

This way if you are searching for HDD problems they are easier to find
by billymm
Tue Oct 23, 2007 2:57 am
Forum: ThinkPad T4x Series
Topic: T40 Battery Not Charging but runs fine from AC
Replies: 8
Views: 3055

...any info on motherboard repair or motherboard troubleshooting would be greatly appreciated
by billymm
Tue Oct 23, 2007 2:53 am
Forum: ThinkPad T4x Series
Topic: T40 Battery Not Charging but runs fine from AC
Replies: 8
Views: 3055

I dont think its the charger as I have 3 of them & the charge light does the same with all. All 3 chargers charge up another T40 ok & the battery light (on the other unit) doesnt stay on when the AC adapter is not connected. I originally had 2GB memory & have removed 1GB. This in my case hasnt chang...
by billymm
Wed Oct 17, 2007 3:31 pm
Forum: ThinkPad T4x Series
Topic: T40 Battery Not Charging but runs fine from AC
Replies: 8
Views: 3055

T40 Battery Not Charging but runs fine from AC

Hi all, I stumbled across this forum when looking for some technical data & I think its a great idea. I have a T40/p which up until a few days ago was working / charging fine. The problem I am having is that as soon as I insert the battery into it the Battery Status light turns orange & stays on unt...

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