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  Motorola Spectra Mobile Radio
HLN6094B Command Board Jumpers

By Robert W. Meister WA1MIK
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This information was obtained from the Spectra Detailed Service manual. The PDF files are incomplete and unsuitable for service work.

Note that some jumpers on the schematic or circuit board layout are identified with a leading zero digit, so you might find JU503 or JU0503. Motorola often uses leading zeroes for parts located on the bottom side of the circuit board, but they didn't follow that convention here. I've removed them in this table.

"Pg" refers to the page number of the printed schematic diagram, a 500kB PDF file that can be found here.

"S" refers to the side of the circuit board X-ray view / layout: top (T) or bottom (B), a 3.2MB PDF file that can be found here.

"Dflt" shows the default condition or value.

"Circuit" is my idea of the electronic functionality the jumper affects.

"See Also" identifies related jumpers that may need to be altered as a set.

"Near" gives you some help in physically locating the jumper.

JumperPgSDfltCircuitSee AlsoNear Notes / Use
JU5001BINPTT508, 524J502 IN FOR PTT
JU5014 OUTFUSED A+F0500  IN TO BYPASS FUSE
JU5021TINU522 SIO U522 CONFIGURATION
JU5031BOUTCH. ACTIVE U401 IN FOR CH. ACTIVE
JU5052BINU520 CPU MIDDLE CONFIGURATION
JU5062BINU521/MLM512J505 CONFIGURATION
JU5074BOUTDET AUDIO9730U401 IN FOR DET AUDIO
JU5081TOUTPTT/A+500, 524J502 IN FOR A+
JU5091BOUTRESET J502 IN FOR RESET
JU5104BOUTIGN/SWB+ P503 IN FOR SWB+
JU5114BOUTMIC HI/GND514, 515P503 IN FOR GND
JU5124BOUTSPARE 1506J502  
JU5134BOUTSPARE 2 J502  
JU5144BINMIC HI/GND511, 515U523 IN FOR MIC HI
JU5151TOUTRESET511, 514U522  
JU5161TOUTEMERGENCY U502 IN TO DISABLE
JU5234BOUTRX AUD / VO2 J502 IN FOR RX AUDIO
JU5241TOUTS.NET WE500, 508J502  
JU7092+3BINU700 SF J502 CONFIGURATION
JU97304BINDET AUDIO507U401 IN FOR DET AUDIO
R00014BOUT+5V503U401 IN FOR +5V
R97454B10KTX AUDIO J502 IN FOR TX AUDIO

NOTE: JU501 is shown on the schematic but not on the circuit board X-ray view. There were additional jumpers listed in a table on the schematic but they were not present on the schematic or the circuit board X-ray view and have been removed.

DISCLAIMER: The information presented herein is accurate to the best of my knowledge. The Notes / Use column is my interpretation of what the jumper seems to affect or be used for. There is no Motorola-published list of jumper configurations.

The author may be contacted at: his-callsign [ at ] comcast [ dot ] net.

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This page originally posted 14-Dec-09.



Article text, photographs, and hand-coded HTML © Copyright 2009 By Robert W. Meister WA1MIK.

This web page, this web site, the information presented in and on its pages and in these modifications and conversions is © Copyrighted 1995 and (date of last update) by Kevin Custer W3KKC and multiple originating authors. All Rights Reserved, including that of paper and web publication elsewhere.