Author Topic: Lifted pad for battery circuit. Help with repair?  (Read 697 times)

0 Members and 1 Guest are viewing this topic.

Offline Mp3Topic starter

  • Frequent Contributor
  • **
  • Posts: 361
  • Country: us
Lifted pad for battery circuit. Help with repair?
« on: July 24, 2018, 08:11:44 pm »
Hi guys! i'm asking for a little bit of advice since there is a battery involved here and i don't want to do something stupid. I got an older machine which uses SRAM and has a soldered in 3.6v battery, the problem is after about 10 minutes of being powered off the machine would lose its memory despite having a new battery.

I opened it and found the pad to the battery was lifted. It must have had just enough contact to let the battery keep it charged within a minute or two of being powered off.

Looking at the circuit, the side with the lifted pad (negative) connects on the PCB to  a nearby transistor(?) while the positive side connects to a nearby resistor.

Is it safe to directly wire the leg of the battery to these two components the PCB connects them to? I don't like to do something so hacky, but i am afraid i don't have much other option.

I've attached a photo of the pcb from the top side as well as clips from the service manual of the relevant parts of the schematics

Thanks in advance!!!
High school graduate
 

Offline Relayer

  • Contributor
  • Posts: 35
  • Country: au
Re: Lifted pad for battery circuit. Help with repair?
« Reply #1 on: July 25, 2018, 12:32:23 am »
Hello Mp3,

Quote
Is it safe to directly wire the leg of the battery to these two components the PCB connects them to? I don't like to do something so hacky, but i am afraid i don't have much other option.

Yes, but you have to be very wary of how much heat you apply to the battery.
Is it possible you could take a photo of the damaged pad and the surrounding
area? It would make it so much easier to see whether the pad and track it used
to connect to can be repaired, rather than soldering it all directly to the battery.
Regards,
Relayer
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf