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TK-480/481
ADJUSTMENT
Repair Jig (Chassis)
Use jig (part No. : W05-0825-00) for repairing the TK-480/
481.
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 repairs.
How to Remove the Flat Cable
1. Gently draw out both sides of the connector lever uni-
formly in the direction of the arrow with tweezers.
(CN300, CN301)
2. Gently prise up the connector lever in the direction of the
arrow with a fine regular screwdriver or tweezers.
(CN1, CN3, CN304)
Tweezers
Lever
Flat cable
Power
module
Jig
TX-RX unit
Battery terminal (+)
Flat cable
Lever
Regular screwdriver

•Panel tuning

•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.
11: GREEN (5M)
TUBE
SCREW
8: YELLOW (PF SW)
2: RED (RX AF OUTPUT)
3: BLACK (RX AF OUTPUT)
10: BROWN (GND)
6: BROWN (MIC GND)
5: WHITE (MIC INPUT)
7: BLUE (PTT SW) GND → ON
PCB layout
Shield
AF voltmeter
Audio generator
100µ 10 V
100µ 10 V
10µ 10 V
+
+
+
16Ω
RED (2)
BLK (3)
+
+
100µ 10V
100µ 10V
16Ω
WHT
(5)
BRN (6)
BLU (7)
BRN (10)
PTT SWTo Radio
AF Voltmeter
Audio generator
+
10µ 10V
Connector case
KPG-36
Remove the
screw