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World of Ham Radio 1997
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WOHR97_AmSoft_(1997-02-01).iso
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bc200_c.doc
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1997-02-01
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Uniden Bearcat 200/205XLT Battery Extension Mod
As usual, I take no responsibility if you screw up your radio or if the mod doesn't work.
BC200XLT LOW BATTERY FIXES
Troy T. Pummill,
Here are two small articles from MT. I have not tried these
mods, do so at your own risk (i.e. your mileage may vary).
From Monitoring Times
Bob's Tip of the Month
May 1990, page 98
BC200XLT SHORT BATTERY LIFE SOLVED
Short battery life--sometime only an hour or two between
charges--seems to be the only major complaint among owners
of the leading hand-held scanner, the Uniden Bearcat
BC200XLT. Presumably, owners of similar sets like the
BC100XLT BC205XLT, and Cobra 4030 could have the same prob-
lem. Now that is an ailment of the past.
It turns out that the batteries were not really at fault; a
zener diode which determines the voltage at which the low-
battery indicator would come on was defective in some units,
causing the circuit to actuate prematurely. Replacing that
idode and changing the value of an associated resistor pro-
vides the answer.
FREE FIX
MT contacted Uniden and was assured that they will provide
the fix for free, even if the radio is outside of the one-
year warranty period. If your Uniden BC200XLT suffers from
short battery life, send the radio along with a brief note
describing the ailment, to Uniden Customer Service, 9900
West Point Drive, Indianapolis, Indiana, 46250.
As shown in the accompanying diagram, zener diode D203 and
resistor R208 are the parts in question. D203 should be
about 7 volts and R208 should be 150,000 ohms. These are
miniature surface-mount devices on double- sided circuit
board; if your radio is under warranty, attempting this fix
yourself will void that warranty.
===========================================================================
BBS: The Technical Hangout BBS
Date: 06-26-92 (15:17) Number: 327
From: MARSHAL PERLMAN Refer#: NONE
To: ALL Recvd: NO
Subj: SCANNER MODS 3/3 Conf: (22) Radio-Scan
---------------------------------------------------------------------------
>>> Continued from previous message
The tools: You will need a small Phillips screwdriver,
fine-tip soldering iron and solder wicking braid.
The procedure: Remove the battery pack, then the two screws
form the bottom spring clip. Carefully pull the rear cover
off, bottom first. Remove the two small screws at the base
of the circuit board. Pull the front panel away from the
mainframe, bottom first.
At the bottom of the remaining board--to the left of the
speaker magnet--are two blue electrolytic capacitors; just
above them are two striped components-- one resistor and one
diode. Using the soldering iron and braid, carefully remove
the two components without overheating the board or damaging
the copper traces.
When you reassemble the radio, be very careful to note the
insertion of the front panel into the slot at the base of
the volume/squelch panel. Be especially careful to align
the screw holes perfectly, allowing the two rows of fine pin
contacts to mate correctly with the socket. If this is not
done correctly (and it probably won't be the first time!) no
damage will occur, but the scanner display will be blank.
Recharge your batteries after 6-8 hours of heavy use. If
the scanner dies, recharge it as soon as possible to prevent
loss of your memorized frequencies.
__
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[___] resistor
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[___] diode
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capacitors (2, round) Speaker Magnet
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