Kenwood TK-480 User Manual

800MHz/900MHz FM TRANSCEIVER

TK-480/481

SERVICE MANUAL

GENERAL ............................................................ 2

SYSTEM SET-UP ................................................ 2

OPERATING FEATURES .................................... 3

REALIGNMENT ................................................. 11

CIRCUIT DESCRIPTION .................................... 14

SEMICONDUCTOR DATA ................................ 20

DESCRIPTION OF COMPONENTS .................. 23

PARTS LIST ....................................................... 24

EXPLODED VIEW ............................................. 30

PACKING ........................................................... 31

ADJUSTMENT .................................................. 32

TERMINAL FUNCTION .................................... 40

PC BOARD VIEWS

DISPLAY UNIT (X54-3210-XX) .................... 41

TX-RX UNIT (X57-5630-XX) ......................... 47

SCHEMATIC DIAGRAM ................................... 53

BLOCK DIAGRAM ............................................. 57

LEVEL DIAGRAM (TK-480) .............................. 59

LEVEL DIAGRAM (TK-481) .............................. 60

KNB-16A/17A (Ni-Cd BATTERY) ..................... 61

KPG-36 (PROGRAMMING INTERFACE CABLE) .... 61

KSC-19 (CHARGER) .......................................... 61

SPECIFICATIONS .............................................. 62

CAUTION
When using an external power connector,
please use with maximum final module pro-
tection of 9V.

CONTENTS

REVISED II

Photo is TK-480/481 K2 type.
(Produced in Singapore)

This service manual applies to products with 30100001 or
subsequent serial numbers.

Knob (PTT)
(K29-5157-03)

Whip antenna
(T90-0636-25) : TK-480
(T90-0640-25) : TK-481

Knob (ENC)
(K29-5232-03)

Knob (VOL)
(K29-5231-03)

Panel assy
(A62-0981-04)

Cabinet assy
(A02-3659-03) : K2

Badge
(B43-1139-04)

Packing
(G53-0841-02) : K2