~ APPLICATION NOTE ~

MODEL NO: NC802-90VOICE INVERSION

SCRAMBLER

RADIO MFG: KENWOODMODEL: TK705D/805D SERIES MOBILES

BY: RMWDATE: 12/02

APP. #1149REV. C, D, E

TONE MODULE RADIO

P1

BLACK/WHITE [MIC AUDIO OUTPUT]

RED (+) [SUPPLY]

ORANGE [RX AUDIO OUTPUT] WHITE/ORANGE [TX KEYING]

GREEN/WHITE [VISUAL OUTPUT DRIVER]

BLUE [RX AUDIO INPUT]

VIOLET [CODE SELECT C] GRAY [CODE SELECT A]

WHITE [CODE SELECT B]

BLACK (-) [SUPPLY]

YELLOW [SCRAMBLE/CLEAR] BLUE/WHITE [MIC AUDIO INPUT]

BROWN [PTT INPUT]

GREEN [SPEAKER BEEP]

HARDWIRED

TO JUNCTION OF [SEE NOTE 2] TO CN3-PIN 6 [8C] TO JUNCTION OF C46/39 & Z1-4 [HPF]

NO CONNECTION

NO CONNECTION

TO JUNCTION OF C46/39 & Z1-3 [HPF]

NO CONNECTION NO CONNECTION

NO CONNECTION

TO CN3-PIN 1 [E] TO AUX. SWITCH [SEE REVERSE SIDE]

TO JUNCTION OF [SEE NOTE 3] TO CN3-PIN 5 [TX] NO CONNECTION

MODIFICATION NOTES

TONE MODULE: *IF NOT FACTORY MODIFIED*1. REPLACE R2 WITH A 33K OHM CHIP RESISTOR.2. REPLACE R7 WITH A 1K OHM CHIP RESISTOR.3. REPLACE R21 WITH A 10K OHM CHIP RESISTOR.4. REPLACE C1 WITH A ZERO (0) OHM CHIP

RESISTOR.5. REMOVE UNUSED LEADS FROM P1.6. CUT WIRE LEADS TO 5 INCH LENGTHS.

1. ADD GENERAL PURPOSE TRANSISTOR (2N4401)AND A 10K OHM RESISTOR AS SHOWN ONREVERSE SIDE WHEN USING AUX. SWITCH TOENABLE OR DISABLE SCRAMBLER AS DESIRED.

2. FOR TK705D - JUNCTION OF R60 AND C54 FOR TK805D - JUNCTION OF R48 AND C47

3. FOR TK705D - JUNCTION OF R60 AND C53 FOR TK805D - JUNCTION OF R48 AND C46

4. REFER TO KENWOOD’S SERVICE MANUAL FORLOCATIONS OF COMPONENTS, SOLDERCONNECTIONS, AND PROGRAMMING OF“OPTIONAL” FUNCTIONS.

RADIO:1. REMOVE CHIP RESISTOR AS SHOWN ON

REVERSE SIDE. FOR TK705D - R60 FOR TK805D - R48

2. REMOVE CHIP CAPACITOR AS SHOWN ONREVERSE SIDE. FOR TK705D - C46 FOR TK805D - C39

3. PROGRAM FRONT PANEL “AUXILIARY” SWITCHTO ENABLE OR DISABLE SCRAMBLER.

NOTICE: THIS IS SHOWN AS A GUIDE ONLY. PLEASE REFER TO INDIVIDUAL EQUIPMENT MANUFACTURER’S MANUALS TO VERIFYCOMPATIBILITY. NORCOMM CORPORATION ASSUMES NO RESPONSIBILITY FOR THE ACCURACY OF THIS INFORMATION OR FOR ANY DAMAGETO THE RADIO, NORCOMM’S MODULE, OR OTHER ASSOCIATED EQUIPMENT RESULTING FROM THE USE OF THIS PROCEDURE.

REFER TO NC802 MANUALPAGE 3 UNDER ‘CODESELECTION’

15385 CARRIE DRIVEGRASS VALLEY, CA 95949

PHONE: (530) 477-8400FAX: (530) 477-8403

web: www.norcommcorp.come-mail: tech@norcommcorp.com

12

3

4

56

7

8

910

11

12

1314

MICROPHONE CIRCUITRY

RECEIVER CIRCUITRY

CLEAR/SCRAMBLE ADDED SWITCH CIRCUITRY

MIC INPUTBLACK/WHITE LEAD

NOTE: FOR TX705D - REMOVE R60 FOR TK805D - REMOVE R48

MIC OUTPUTBLUE/WHITE LEAD

REC AUDIO OUTPUT REC AUDIO INPUTORANGE LEAD BLUE LEAD

NOTE:FOR TK705D - REMOVE C48FOR TK805D - REMOVE C39

CONNECTED TO PLUGCN 204-PIN 4 [P03]

CUSTOMERADDED CIRCUITRY

CLEAR/SCRAMBLED YELLOW LEAD 10KÙ

2N4401 (NPN) OR EQUIV. KENWOOD TK705D/805D

SERIES MOBILE