Kenwood TK-280 Service Manual page 43

• Panel tuning
SCREW
TUBE
BLU (7)
To Radio
BRN (10)
RED (2)
BLK (3)
• PC tuning
Connect the wires to the PCB in the connector case of
interface cable.
For output the wires out of the connector case, need to
process the connector case.
KPG-36
Remove the
screw
PCB layout
16 Ω
Shield
ADJUSTMENT
2: RED (RX AF OUTPUT)
3: BLACK (RX AF OUTPUT)
5: WHITE (MIC INPUT)
6: BROWN (MIC GND)
7: BLUE (PTT SW) GND → ON
8: YELLOW (PF SW)
10: BROWN (GND)
11: GREEN (5M)
PTT SW
100µ 10V
+
16Ω
AF Voltmeter
+
100µ 10V
WHT
+
(5)
10µ 10V
Audio generator
BRN (6)
PCB lay
Connector case
100 µ 10 V
+
100 µ 10 V
AF voltmeter
+
10 µ 10 V
+
Audio generator
Repair Jig (Chassis)
Use jig (part No.: W05-0825-00) for repairing the TK-280.
The jig facilitates the voltage check and protects the module
when the voltage on the flow side of the TX-RX unit is checked
during pepairs.
Battery terminal (+)
Power
module
How to Remove the Flat Cable
1. Gently draw out both sides of the connector lever uniformly
in the direction of the arrow with tweezers.
(CN300, CN301)
Flat cable
2. Gently rise up the connector lever in the direction of the
arrow with a fine regular screwdriver or tweezers.
(CN1, CN3, CN304)
Regular screwdriver
TK-280
TX-RX unit
Jig
Tweezers
Lever
Flat cable
Lever
43