Kenwood TK-7160 Service Manual

© 2005-7 PRINTED IN JAPAN
B51-8722-00
(
N
)
375
VHF FM TRANSCEIVER
TK-7160/7162
SERVICE MANUAL
GENERAL .................................................. 2
SYSTEM SET-UP ...................................... 3
OPERATING FEATURES .......................... 4
REALIGNMENT ......................................... 6
DISASSEMBLY FOR REPAIR ................. 10
CIRCUIT DESCRIPTION .......................... 11
SEMICONDUCTOR DATA ...................... 16
COMPONENTS DESCRIPTION .............. 17
PARTS LIST ............................................. 18
EXPLODED VIEW.................................... 26
PACKING ................................................. 27
ADJUSTMENT ........................................ 28
TERMINAL FUNCTION ........................... 33
PC BOARD
DISPLAY UNIT (X54-3510-10) ............ 34
DISPLAY UNIT (X54-3522-70) ............ 36
TX-RX UNIT (X57-7102-70) ................ 38
SCHEMATIC DIAGRAM.......................... 42
BLOCK DIAGRAM ................................... 48
LEVEL DIAGRAM .................................... 50
SPECIFICATION ................... BACK COVER
CONTENTS
Panel assy
(A62-1107-13)
Key top
(K29-9342-01)
Modular jack
(E08-0877-05)
Panel assy
(A62-1108-03)
Key top
(K29-9342-01)
Modular jack
(E08-0877-05)
TK-7160 E
TK-7162 E
This product uses Lead Free solder.

Kenwood TK-7160 Specifications

Power

operating voltage	13.6V DC ± 15%
current drain on standby	Less than 0.4A
current drain on receive	Less than 1.0A
current drain on transmit	Less than 8.0A

Operating Environment

operating temperature range	–30°C to +60°C
frequency stability	± 2.5ppm

Receiver Specifications

sensitivity (12dB SINAD) wide	0.28µV
sensitivity (12dB SINAD) narrow	0.35µV
selectivity wide	75dB
selectivity narrow	65dB
intermodulation wide	70dB
intermodulation narrow	60dB
spurious response	75dB
audio power output	4.0W

Transmitter Specifications

rf power output high	25W
rf power output low	5W
spurious and harmonics	70dB
modulation wide	16K0F3E
modulation narrow	11K0F3E
fm noise wide	45dB
fm noise narrow	40dB
audio distortion	Less than 3%

Weight and Dimensions

width	6.30 inch (160 mm)
height	1.70 inch (43 mm)
depth	5.40 inch (137 mm)
weight	2.60 lbs (1.18 kg)

Summary

GENERAL

PERSONAL SAFETY

Safety precautions during operation and servicing.

GENERAL / SYSTEM SET-UP

SERVICE

Guidance on servicing using schematics, PCB views, and alignment procedures.

REALIGNMENT

5. Self Programming Mode

Explains self-programming mode for TK-7160, intended for authorized service personnel.

CIRCUIT DESCRIPTION

Unlock Circuit

Explains the circuit that prevents transmission when the PLL is unlocked.

Power Supply Circuit

Explains the power supply operation, voltage regulation, and protection circuits.

ADJUSTMENT

Test Equipment Required for Alignment

Lists necessary test equipment and their major specifications for alignment.

PCB Section

Details adjustments for Setting, VCO lock voltage, IF coil, and RF bandpass filter.

2. Squelch 9

Procedure for adjusting squelch levels with specific SSG output and modulation.

Receiver Section

Details sensitivity adjustment for wide/narrow channels and SSG output levels.

Transmitter Section

Details adjustments for frequency, maximum power limiting, and high power.

SCHEMATIC DIAGRAM

DISPLAY UNIT (X54-3510-10)

Schematic diagram for the TK-7160 display unit.

LEVEL DIAGRAM

Receiver Section

Level diagram illustrating signal levels in the receiver section.

SPECIFICATIONS

GENERAL (Applicable standards: EN standard, AS-4295)

RECEIVER (Measurements made per EN standard)

TRANSMITTER (Measurements made per EN standard)