Contents / General; Ordering Replacement Parts; Personnel Safety; Table Of Contents - Kenwood TK-790 Service Manual

TK-790/ ( B
GENERAL ......................................................................................................................... 2
SYSTEM SET-UP ............................................................................................................. 4
OPERATING FEATURES ................................................................................................. 5
INSTALLATION .............................................................................................................. 16
DISASSEMBLY FOR REPAIR ......................................................................................... 22
CIRCUIT DESCRIPTION ................................................................................................. 26
SEMICONDUCTOR DATA ............................................................................................. 32
DESCRIPTION OF COMPONENTS ............................................................................... 36
PARTS LIST .................................................................................................................... 39
EXPLODED VIEW .......................................................................................................... 57
PACKING ........................................................................................................................ 61
ADJUSTMENT ............................................................................................................... 65
TERMINAL FUNCTION ................................................................................................. 74
WIRING .......................................................................................................................... 77
PC BOARD VIEWS / CIRCUIT DIAGRAMS
DISPLAY UNIT (X54-3190-20) : KCH-10 .................................................................. 79
DISPLAY UNIT (X54-3200-20) : KCH-11 .................................................................. 81
CONTROL UNIT (X57-5610-XX) (B/3) ..................................................................... 87
FINAL UNIT (X57-5610-XX) (C/3) : TK-790/(B) ....................................................... 97
TX-RX UNIT (X57-5610-XX) (A/3) ......................................................................... 101
FINAL UNIT (X45-3560-10) : TK-790H(B) .............................................................. 113
BLOCK DIAGRAM ........................................................................................................ 117
SPECIFICATIONS ......................................................................................................... 119
GENERAL
INTRODUCTION
SCOPE OF THIS MANUAL
This manual is intended for use by experienced techni-
cians familiar with similar types of commercial grade com-
munications equipment. It contains all required service in-
formation for the equipment and is current as of this publica-
tion date. Changes which may occur after publication are
covered by either Service Bulletins or Manual Revisions,
which are issued as required.

ORDERING REPLACEMENT PARTS

When ordering replacement parts or equipment informa-
tion, the full part identification number should be included.
This applies to all parts : components, kits, and chassis. If
the part number is not known, include the chassis or kit
number of which it is a part and a sufficient description of
the required component, for proper identification.
2
) /H ( B )

CONTENTS / GENERAL

PERSONNEL SAFETY

The following precautions are recommended for person-
nel safety :
• DO NOT transmit if someone is within two feet (0.6
meter) of the antenna.
• DO NOT transmit until all RF connectors are secure and
any open connectors are properly terminated.
• SHUT OFF this equipment when near electrical blasting
caps or while in an explosive atmosphere.
• All equipment should be properly grounded before
power-up for safe operation.
• This equipment should be serviced by only qualified tech-
nicians.