On Fri, 27 Feb 2009 23:16:58 -0600, wrote:

On Fri, 27 Feb 2009 20:17:10 -0800, David Nebenzahl
wrote:

On 2/27/2009 6:04 PM Zootal spake thus:

There isn't much to this thing - it was not a high quality unit to
start with, and there are only a handfull of components in it. There
is no obvious sign of damage. Is it worth fixing? Probably not.

You've answered your own question there. Probably the majority of the
circuit, including what's damaged, is in one ASIC (application-specific
integrated circuit). Not a replaceable part.

Get a new meter.


I agree this is likely an ASIC. I'd suggest cleaning the pots inside
as a possible fix, and clean the switch too.

Otherwise..........

Im no fan of Ebay, and I dont even use ebay, so I am not recommending
this,
but I did a search for this model and ran across this one on ebay.
This is the model 22-168a
Probably very similar but the next upgrade model.

Keep the original one for sentimental reasons, (remove the batteries).

Get a new one for use. Maybe this one.
Currently no bids, $30 starting bid, Buy it now $50
$7 shipping.
18 hours left
Ebay Item number: 110354829090

4+ hours left now, but there is no Buy it Now. I didn't think that
would happen, especially since it's still only 1 bidder at 30 dollars.


Here's the parts list

-----------------

http://support.radioshack.com/suppor...oc21/21589.htm

220-0166B DIGITAL MULTIMETER Faxback Doc. #
21589

To order parts call 1-800-843-7422 or visit your local RadioShack
store.

Reference # Cat.No. Description NP Part #
------------------------------------------------------------------------
11334687 2SD400
10529378 REPLACED BY 2SD400 2TR1067
DUE TO COST OF UNIT. AA0000X
C13 12237004 CAP CER 50V .1UF +-10
CDR104KJBC
12237004 AFTER DATE CODE 5A7
CDR104KJBC
10589745 CX0171
11290558 DB0946
10623197 DX0587
D003 D004 D005 D006 10623593 DIODE LL4148 FAST RECT DX0702
10623593 DX0702
10698454 HF1249
10769370 ROTARY SWITCH K3006
10846400 MANUAL,USERS 22-166A
MU2200166A
IC001 10871028 IC,NJU9207F C-MOS AC/DC MX0421
10871028 MX0421
VR002 10972040 POT,SEMI-FIXED 10KB P6013
10972040 P6013
VR001 10972511 POT,2KB SEMI-FIXED P6141
10972511 P6141
PO001 11053410 POSISTOR RX0012
11053410 RX0012
SW002 11054343 SWITCH,SLIDE POWER S0078
11054343 S0078
SW001 11054350 SWITCH,ROTARY RANGE S0079
11054350 S0079
11115185 W3417
11222502 WINDOW PVC SILK Z7104
11222510 LABEL WARNING STICKER Z7108

(This list was generated on 07/08/2005)



Good luck