Kenwood TK-885, Service Manual

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16
TK-885
5. Optional Voice Scrambler Function
You can use the voice scrambler in the following two con-
figurations.
1. Assign this function to the Scrambler key by using the
programming software (KPG-62D CPS).
When the Scrambler key is pressed, the ... indicator
appears, and the optional (scrambler) function is enabled.
When the key is pressed again, the ... indicator goes off
and the function is disabled.
2. Using the KPG-62D CPS, you can set the voice scrambler
to be always active, without pressing a key. The operator
cannot switch off the voice scrambler.
5-1. Configuring a Scrambler Code
The scrambler code cannot be changed using the trans-
ceiver keys. Only one scrambler code can be set into the
transceiver. If you want to change the code, you must use
the KPG-62D CPS to reconfigure the scrambler code.
5-2. Voice Scrambler Board Connection
Modification
1. Remove the upper half of the case of the TK-885.
2. Remove R529 and R571 on the Control unit (X57-637 B/2).
Code 4 (C4)
Code 3 (C3)
Code 2 (C2)
Code 1 (C1)
(TX-RX PCB)
(TX-RX PCB)
(TX-RX PCB)
(TX-RX PCB)
(TX-RX PCB)
(Cont. PCB)
(Cont. PCB)
(Cont. PCB)
TXAI (TXAI)
RXAI (RXAI)
OPT (OP)
MPTT (MPTT)
SB (SB)
GND (GND)
RXAO (RXAO)
TXAO (TXAO)
R529
Remove
R571
Remove
TK-885 Scrambler board
( ) : PCB silk name
(Cont. PCB)
(Cont. PCB)
(Cont. PCB)
(Cont. PCB)
C4 C3
OP
C2
C1
MPTT
GND
SB
TXAO
TXAI
RXAO
RXAI
R571
R529
Fig. 7 /
Fig. 8 /
TX-RX unit (A/2)
Component side view
Control unit (B/2)
Foil side view
INSTALLATION /