Posts: 52
Threads: 19
Joined: Nov 2007
hi david please let me have a look i have the same problems and searching for a hp 9114 a or b.
By the way check in the power suplly box (open with
screw driver (flat)) You find a big matsushita battery
6,75 V 3 amps average ( i pick up in my mind) plus a print with little diode bidge 1 tip 41c transistor and some zener or other parts: One of these is a fuse .I supposed it a long time .Recently i discover this forum
and i found Tony Duell for sample who repaired this unit with an other HP user thru the forum .Tony Duell
confirmed my supposition the resistor have already
a siver or gold ring for tolerance and which one looks
like a resistor but doesn t be one. i check in my
data and give you the colors from the fuse.Tony Duell
said it could be a 3 amps use...which is logically adapted for the battery capacity.
Posts: 52
Threads: 19
Joined: Nov 2007
Hi david,
look at this
hp forum archive 9 Re Is there a fuse on the main board of the 9114 a? tony duell writing...
hp forum archiv 12 Re 9114b pinout tony duell writing..
so i confirm you the other mail have luck to repair it.
and if you can give me a tip to find a 9114 to buy...?
many thanks from Europe France Basel.
Christopher
Posts: 1,162
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Joined: Aug 2005
There's a schematic of the battery pack (both versions), along with the rest of the 9114A and many other HP calculators and peripherals on the HPCC schematics CD-ROM.
There's a picofuse in these battery packs on the PCB, connected between the battery +ve terminal and the output. It looks like a resistor, and is normally rated at 2A (although I have seen 5A ones that don't look like they've ever been replaced. I would check this first.
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