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BEARCAT 200XLT CELLULAR FREQUENCY RESTORATION
AKNOWLEDGEMENTS
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The following was extracted, and partially edited, from literature
received from:
MONITORING TIMES
140 Dog Branch Road
Brasstown, North Carolina 28902
If the reader desires to obtain the original literature, which comes
complete with an illustration of the circuit board and indication of
the resistor to be cut, a check for $2.00 along with a stamped self-
addressed envelope may be mailed to the above address. The
turn-around for my literature was very fast (Less than 1 week after
mailing my check). Although the directions presented here should be
quite adequate, the quick turn-around on the mail order literature
might provide the extra measure of visual security that some desire.
The documentation also includes a review of the BC200/205XLT scanner.
NOTES
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It is unlawful to monitor cellular telephone conversations. It is
possible to monitor signals from the deleted ranges even without
conversion. Simply add 21.7 MHZ to the deleted frequency and enter
the higher (image) frequency. Reception is virtually identical in
strength to that which would be heard on the deleted frequency.
The frequencies deleted at the factory may be restored, but the
procedure should not be attempted by anyone unfamiliar with
electronic circuitry. No one anywhere, anytime, in anyway, etc...
assumes any reponsibility for damage caused by this procedure.
THIS MODIFICATION WILL VOID YOUR WARRANTY!
TOOLS
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Small Philips Screwdriver
Small Wire Cutters
DISASSEMBLY
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1. Slide off the battery pack and remove your antenna.
2. Remove the two screws from the back of the scanner, the two screws
which hold the battery retaining spring at the base, and the battery
retaining spring itself.
3. Carefully pry the bottom of the rear cover from the radio and remove the
cover.
4. Locate the two small screws at the base of the circuit board and remove
them. Gently pull the front panel from the mainframe at the base and
seperate them.
MODIFICATION
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5. On the face of the circuit board that faces the front of the scanner when
installed, locate the microprocessor IC labeled "UNIDEN UC-1147". Locate
the 10K ohm resistor (brown, black, orange), which is positioned
approximately along the longitudinal centerline of the board, and next to
the microprocessor. The resistor is of the leadless type and should be
positioned directly next to the microprocessor and above the "DEN" on the
IC label.
6. Using the small wire cutters, cut the resistor body in two without
disturbing anything next to it. If the left solder pad comes loose, it
may be peeled from the board. Brush or blow away any debris. This
completes the restoration.
REASSEMBLY
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7. Insert the top of the front panel into the slot under the volume/squelch
control panel and, noting carefully the alignment of the dual-inline
connector at the bottom of the board, press the front panel firmly into
place. Be sure that the holes at the bottom of the circuit board line
up with the holes in the plastic standoffs below them. Insert the two
screws and gently tighten them.
8. Replace the back cover by inserting the top of the cover into the slot
under the volume/squelch control panel; press the cover into place,
insert and tighten the screws.
9. Reposition the battery retaining spring (slotted side toward notched hole),
insert the two remaining screws and gently but securely tighten them.
10. Slide the battery pack into place; switch the scanner on to make sure the
display comes on. If not, the battery is discharged or the dual-inline
connector was misaligned during assembly (see step 7).
CHECK OUT
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11. Assuming the display comes on, press: MANUAL, 845.0, E; within two seconds
the frequency 845.000 should appear on the display.