Setting The Kdd-4 Code (Dtmf); Accessory Connection Cable; Installing The Kct-19 In The Transceiver; Jumper Setup Charts - Kenwood TK-940 Service Manual

INSTALLATION
1-3. Setting the KDD-4 code (DTMF)
This product
IS
b u ~ l t using surface mount construc-
tion techniques. The solder jumpers used t o configure
this product should be changed using equipment-and
techniques suitable for surface mount device repair.
Abuse due t o the use of inappropriate tools and tech-
niques will VOID the warranty.
*
0
3
, m r . m
u ,
m
3
7
3 3 3 3 3 3
7
- 7 7 7 7 7 1
I
1
MONIRESET >
1
ON-HOOK OFF-HOOK
I
JU2
1
Shorted Open c ~ r c u ~ t
"-
1
(--I
supply
Fig. 5
JU3
Shorted
Open
Shorted
Open
Shorted
2. Accessory Connection Cable
(KCT-19 : Option)
The KCT-I9 is an accessory connection cable for
connecting external equipment. The connector has 15
pins and the necessary signal lines are selected for
use.
JUJ
E
A
A
C
C
2-1. Installing the KCT-19 in the transceiver
1. Remove the upper and l o w e r halves o f the
transceiver case, and lift the DC cord bushing
( 0 )
from the chassis.
2. Remove the pad
(
0
).
Table 1 Jumper setup charts
MUTE URIMUTE
Sinks to
(-1
supply
A
Fig. 6
Sources
(+)
supply
Open
circuit
HCMOS HI (5Vdc)
HCMOS LO (OVdc)
Open circuit
Sources
(+)
supply
HCMOS LO (OVdc)
HCMOS HI (5Vdc)