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