116 lines
5.0 KiB
Plaintext
116 lines
5.0 KiB
Plaintext
|
||
BEARCAT 200XLT CELLULAR FREQUENCY RESTORATION
|
||
|
||
|
||
|
||
AKNOWLEDGEMENTS
|
||
---------------
|
||
|
||
|
||
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
|
||
-----
|
||
|
||
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
|
||
-----
|
||
|
||
Small Philips Screwdriver
|
||
Small Wire Cutters
|
||
|
||
|
||
DISASSEMBLY
|
||
-----------
|
||
|
||
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
|
||
------------
|
||
|
||
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 longitud
|
||
inal 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 with
|
||
out 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
|
||
----------
|
||
|
||
7. Insert the top of the front panel into the slot under the
|
||
volume/squelch control panel and, noting carefully the align
|
||
ment 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
|
||
---------
|
||
|
||
11. Assuming the display comes on, press: MANUAL, 845.0, E; within
|
||
two seconds the frequency 845.000 should appear on the display.
|
||
|
||
|
||
|