Gadget1st

Help!!!

My 4 year old iPAQ has finally given up and will not power up, I have tried a different battery/charger.

I personally think it's the charging circuit, HP want to charge me £175 to get it repaired!

I have engineering knowledge and can find my way around a PCB, if someone has either specific information or a complete schematic I would be very greatfull.

Thanks in advance.

Gadget

dfmclore

Welcome aboard gadget1st I am sorry to hear of your plight. Have you thought about replacing it I replaced mine about 2 months back for about $125 us on ebay the good thing aside from the synch cradle most everything that you have for it will work on any of the h series 3600 - 5500 series I bought an h 3950 and haven't looked back. I loved my h 3630 but this soooo much faster and I got to keep all my memory card and expansion pack.

BTW I could not locate any schematics for the h 3600 when I looked. Needed to replace front bezel.

http://www.ipaqhq.com/forums/showthread.php?t=17739

http://www.ipaqhq.com/forums/showthread.php?t=15848

http://www.ipaqhq.com/forums/showthr...el+replacement

these threads nay ao may not help I'm not sure.

__________________
"The usefulness of a door or window is emptiness."

門或窗口的有用性是空虛

DavesPPC

While I love the concept of all DIY projects...I'd say that a 3630 wouldn't be worth saving.
You could buy a used 3630 on ebay for less than $50 but I'd take this opportunity to upgrade!!
At least go with a H37xx series....and can still be bought for around $50
The H3765 is a great unit still, I have one still, although it has been handed down to my son. Works great after all these years, and a tremendous upgrade from the 3630.

jagster

The charging controller is made by BENCHMARQ for compaq.
It is actually a BQ2057CTS, look on the Texas Instruments site for a datasheet.

This chip is on the back side, so you have to take the pcb out to check/replace this IC. The transistor and FET are on the other side left of the battery connector

Also get:
ftp://ftp.handhelds.org/misc/compaq/.../PDF/Reference power.pdf

The circuit on page 3 looks simmilar to the circuit of the ipaq.
Only the MAX846AEEE is then the BQ6257CTS

Michel

dfmclore

Originally Posted by jagster

The charging controller is made by BENCHMARQ for compaq. It is actually a BQ2057CTS, look on the Texas Instruments site for a datasheet. This chip is on the back side, so you have to take the pcb out to check/replace this IC. The transistor and FET are on the other side left of the battery connector Also get: ftp://ftp.handhelds.org/misc/compaq/.../PDF/Reference power.pdf The circuit on page 3 looks simmilar to the circuit of the ipaq. Only the MAX846AEEE is then the BQ6257CTS Michel

Welcome to the site jagster nice bit of research there.

__________________
"The usefulness of a door or window is emptiness."

門或窗口的有用性是空虛