BENDIXKing KY 97A User manual

MAINTENANCE MANUAL
KY 96A, KY 97A
VHF COMMUNICATION
TRANSCEIVER
MANUAL NUMBER 006-05674-0005
Revision 5, April 2003
h

WARNING
THE ENCLOSED TECHNICAL DATA IS ELIGIBLE FOR EXPORT UNDER LICENSE
DESIGNATION NLR AND IS TO BE USED SOLELY BY THE INDIVIDUAL/ ORGANIZA-
TION TO WHOM IT IS ADDRESSED. DIVERSION CONTRARY TO U.S. LAW IS PRO-
HIBITED.
COPYRIGHT NOTICE
©1989, 1992, 1994, 1997, 2003 HONEYWELL INTERNATIONAL INC.
REPRODUCTION OF THIS PUBLICATION OR ANY PORTION THEREOF BY ANY
MEANS WITHOUT THE EXPRESS WRITTEN PERMISSION OF HONEYWELL IS
PROHIBITED. FOR FURTHER INFORMATION CONTACT THE MANAGER, TECHNICAL
PUBLICATIONS, HONEYWELL, ONE TECHNOLOGY CENTER, 23500 WEST 105TH
STREET OLATHE KS 66061 TELEPHONE: [phone].

BKY 96A, KY 97A
Rev 5, Apr 2003 MM 006-05674-0005.dwd RH-1
REVISION HISTORY
MAINTENANCE MANUAL
BENDIX/KING
KY 96A, KY 97A
VHF Communication Transceiver
PART NUMBER REV DATE DESCRIPTION
---------------------------------------------------------------------------------------------------------------------
006-05674-0005 5 Apr/2003 Incorporated -0020 SW/HW versions.
006-05674-0004 4 Apr/1994 Incorporated IM Rev 3.
006-05674-0003 3 Jan/1994 Revised Section VI.
Incorporated IM Rev 2.
006-05674-0002 2 Oct/1992 Revised Section VI.
006-05674-0001 1 Oct/1989 Incorporated IM Rev 1.

BKY 96A, KY 97A
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THIS PAGE RESERVED

BTABLE OF CONTENTS KY 96A, KY 97A
Rev 5, Apr 2003 MM 006-05674-0005.dwd TOC-1
SECTION IV
THEORY OF OPERATION
Paragraph Page
4.1 General....................................................................................................4-1
4.2 GeneralCircuit Theory.............................................................................4-1
4.3 Detailed Theory of Operation...................................................................4-3
LIST OF ILLUSTRATIONS
Figure Page
4-1Receiver Block Diagram........................................................................4-13
4-2Transmitter Block Diagram....................................................................4-15
4-3Microprocessor Block Diagram..............................................................4-17
SECTION V
MAINTENANCE
Paragraph Page
5.1 GeneralInformation.................................................................................5-1
5.2 Test Equipment........................................................................................5-1
5.3 Performance Test Procedure...................................................................5-4
5.4 Alignment Procedure ...............................................................................5-9
5.5 Overhaul................................................................................................5-11
LIST OF TABLES
Table Page
5-1Required Test Equipment........................................................................5-1
5-2Optional Test Equipment.........................................................................5-2
LIST OF ILLUSTRATIONS
Figure Page
5-1TypicalTest Equipment Setup................ ................................................5-3
5-2Linear Detector....................................... ..............................................5-13
5-3MIC Test Circuit...................................... ..............................................5-13
5-440 dB Antennuator.................................. ..............................................5-14
5-5
Bench Test Harness.................................. ..............................................5-15

BTABLE OF CONTENTS KY 96A, KY 97A
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SECTION VI
ILLUSTRATED PARTS LIST
Paragraph Page
6.1 Introduction..............................................................................................6-1
6.2 Bill of MaterialDescription.......................................................................6-1
6.3 SoftwareDocumentation .........................................................................6-9
6.4 Illustrated Parts List ...............................................................................6-17
6.4.1KY96A VHF Communication Transceiver.............................................6-17
6.4.2KY97A VHF Communication Transceiver.............................................6-41
6.4.3KY96A, KY 97A Unit Software Set.......................................................6-53
6.4.4LCDProcessor Board............................................................................6-57
6.4.5KY97A (14V) Modulator Assembly .......................................................6-71
6.4.6KY96A (28V) Modulator Assembly .......................................................6-79
6.4.7LCDDisplay Board ................................................................................6-87
6.4.8Transmitter Board................................................................................6-105
6.4.9Audio Amplifier Board..........................................................................6-135
6.4.10 Main Board ..........................................................................................6-149
LIST OF TABLES
Table Page
6-1Reference Designator Abbreviations.......................................................6-1
6-2Description Abbreviations........................................................................6-3
6-3Unit of MeasureAbbreviations.................................................................6-9
LIST OF ILLUSTRATIONS
Figure Page
6-0Sample Parts List.................................... ..............................................6-13
6-1KY96A Final Assembly ..........................(Dwg 300-04268-0000).........6-25
6-1AKY96A Final Assembly ..........................(Dwg 300-04268-0000).........6-29
6-1BKY96A Final Assembly ..........................(Dwg 300-04268-0000).........6-33
6-1CKY96A Final Assembly ..........................(Dwg 300-04268-0000).........6-37
6-2KY97A Final Assembly ..........................(Dwg 300-04268-0001).........6-49
6-3LCDProcessor Board Assembly ............(Dwg 300-07475-0000).........6-61
6-3ALCD Processor Board Assembly ............(Dwg 300-07475-0000).........6-63
6-4LCDProcessor Board Schematic...........(Dwg 002-07475-0000).........6-65
6-4ALCD Processor Board Schematic...........(Dwg 002-07475-0000).........6-67
6-4BLCD Processor Board Schematic...........(Dwg 002-07475-0000).........6-69
6-5KY97A (14V) Modulator Assembly ........(Dwg 300-04270-0000).........6-75
6-5AKY97A (14V) Modulator Assembly ........(Dwg 300-04270-0000).........6-77
6-6KY96A (28V) Modulator Assembly ........(Dwg 300-04271-0000).........6-83

BTABLE OF CONTENTS KY 96A, KY 97A
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6-6AKY96A (28V) Modulator Assembly ........(Dwg 300-04271-0000).........6-85
6-7LCDDisplay Board Assembly.................(Dwg 300-07479-0000).........6-91
6-7ALCD Display Board Assembly.................(Dwg 300-07479-0000).........6-93
6-7BLCD Display Board Assembly.................(Dwg 300-07479-0000).........6-95
6-7CLCD Display Board Assembly.................(Dwg 300-07479-0000).........6-97
6-8LCDDisplay Board Schematic ...............(Dwg 002-07479-0000).........6-99
6-8ALCD Display Board Schematic ...............(Dwg 002-07479-0000).......6-101
6-8BLCD Display Board Schematic ...............(Dwg 002-07479-0000).......6-103
6-9KY97A (14V) Transmitter Assembly......(Dwg 300-07540-0000).......6-109
6-9AKY97A (14V) Transmitter Assembly......(Dwg 300-07540-0000).......6-111
6-9BKY97A (14V) Transmitter Assembly......(Dwg 300-07540-0000).......6-113
6-10KY97A (14V) Transmitter Schematic.....(Dwg 002-07540-0000).......6-115
6-10AKY97A (14V) Transmitter Schematic.....(Dwg 002-07540-0000).......6-117
6-10BKY97A (14V) Transmitter Schematic.....(Dwg 002-07540-0000).......6-119
6-11KY96A (28V) Transmitter Assembly......(Dwg 300-07540-0001).......6-121
6-11AKY96A (28V) Transmitter Assembly......(Dwg 300-07540-0001).......6-123
6-11BKY96A (28V) Transmitter Assembly......(Dwg 300-07540-0001).......6-125
6-12KY96A (28V) Transmitter Schematic.....(Dwg 002-07540-0001).......6-127
6-12AKY96A (28V) Transmitter Schematic.....(Dwg 002-07540-0001).......6-129
6-12BKY96A (28V) Transmitter Schematic.....(Dwg 002-07540-0001).......6-131
6-12CKY96A (28V) Transmitter Schematic.....(Dwg 002-07540-0001).......6-133
6-13Audio Amplifier BoardAssembly ............(Dwg 300-07797-0000).......6-139
6-13AAudio Amplifier BoardAssembly ............(Dwg 300-07797-0000).......6-141
6-14Audio Amplifier BoardSchematic...........(Dwg 002-07797-0000).......6-143
6-14AAudio Amplifier BoardSchematic...........(Dwg 002-07797-0000).......6-145
6-14BAudio Amplifier BoardSchematic...........(Dwg 002-07797-0000).......6-147
6-15KY97A (14V) MainBoard Assembly......(Dwg 300-07799-0000).......6-199
6-15AKY97A (14V) MainBoard Assembly......(Dwg 300-07799-0000).......6-203
6-15BKY97A (14V) MainBoard Assembly......(Dwg 300-07799-0000).......6-207
6-15CKY97A (14V) MainBoard Assembly......(Dwg 300-07799-0000).......6-211
6-16KY96A (28V) MainBoard Assembly......(Dwg 300-07799-0001).......6-215
6-16AKY96A (28V) MainBoard Assembly......(Dwg 300-07799-0001).......6-219
6-16BKY96A (28V) MainBoard Assembly......(Dwg 300-07799-0001).......6-223
6-16CKY96A (28V) MainBoard Assembly......(Dwg 300-07799-0001).......6-227
6-17KY96A, KY 97A Main Board Schem......(Dwg 002-07799-0000).......6-231
6-17AKY96A, KY 97A Main Board Schem......(Dwg 002-07799-0000).......6-249
6-17BKY96A, KY 97A Main Board Schem......(Dwg 002-07799-0000).......6-261

BTABLE OF CONTENTS KY 96A, KY 97A
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APPENDIX S
SOFTWARE/ HARDWARE CONFIGURATION
LIST OF ILLUSTRATIONS
Figure Page
S-1KY96A Software/ Hardware Configuration............................................ S-3
S-2KY97A Software/ Hardware Configuration............................................ S-9

BKY 96A, KY 97A
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SECTION IV
THEORY OF OPERATION
4.1 GENERAL
The KY 96A, KY 97A Comm Transceiver is comprised of:
A. A single conversion VHF receiver utilizing a four pole varactor tuned prese-
lector, field effect transistors for the RF amplifier and mixer, an 8 pole mono-
lithic crystal IF filter and integrated circuit IF amplifier.
B. A broadband transmitter with power transistors mounted on a die-cast alu-
minum heat sink followed by a three section elliptic function low pass filter.
C. A control section utilizing a microprocessor to:
1. Increment or decrement the selected frequency.
2. Store the “USE,” “STBY,” and 9 user programmable channels in non-vola-
tile memory.
3. Remote transfer the “USE” and “STBY” frequencies and remote increment
the stored channels.
4. Light the display with a digital liquid crystal readout and control dimming of
the display.
5. Generate frequency code for the synthesizer.
D. A power supply made up of a discrete 9 volt regulator, 3 terminal 5 volt reg-
ulator.
E. A liquid crystal frequency display with variable backlighting and viewing an-
gle.
4.2 GENERAL CIRCUIT THEORY
4.2.1 Receiver
Areceiverblock diagram isshown in Figure 4-1.The received signal passes through
the low pass filter on the transmitter PC board and the T/R diode to the dual gate field
effect transistor RF amplifier. The desired signal proceeds to the dual gate FET mixer
Q103 where it is converted to 11.4 MHz, and fed through the monolithic crystal filter to
the integrated circuit IF amplifiers followed by the detector. Automatic gain control
voltage is fed back to the first and second IF amplifiers and the RF amplifier to achieve
more than 120 dB of dynamic range. The detected signal is not allowed to pass
through the squelch gate until the input signal has:
A. Exceeded the noise squelch setting or,
B. Exceeded the carrier level setting.

BKY 96A, KY 97A
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It proceeds through the low pass filter which attenuates all audio frequencies above
2.5 kHz. The audio signal is fed through the volume control to the integrated circuit
audio pre-amplifier. Its output will provide more than 100 milliwatts to a headphone,
or to an external audio mixer/amplifier.
An optional 4 ohm audio amplifier provides 4 watts on the 13.75 V units and 8 watts
on the 27.5 V units.
4.2.2 Transmitter/ Modulator
The transmitterblock diagram isshownin Figure 4-2. In the transmit mode, the VCO
feeds a signal to the transmitter of the frequency selected in the “USE” display window
on the front panel. The signal is amplified by the broadband transmitter to the 5 watts
level and fed through the elliptic function 3 section low pass filter to the antenna.
Modulation is applied to the power amplifier by series modulating the 27.5 volt line
(13.75 for KY 97A) with mic audio. A small amount of mic audio is also fed to the re-
ceiver audio amplifier for sidetone.
4.2.3 Stabilized Master Oscillator
The stabilized master oscillator (SMO) I103 generates the RF drive for the transmitter
as well as the local oscillator for the receiver. The SMO synthesizes frequencies that
are referenced to a 25 kHz signal derived from a 3.975 MHz crystal oscillator. Receive
and transmit codes are fed to the synthesizer by the microprocessor (uP) and repre-
sent the frequency indicated in the “USE” window on the front panel.
4.2.4 Microprocessor and Display
Refer tomicroprocessor block diagramshown inFigure 4-3.Themicroprocessor (uP)
contains 4 k bytes of permanent Read Only Memory (ROM) for program instruction. A
32 byte non-volatile memory is used externally for frequency information storage. The
uP receives a 3.975 MHz clock signal from the synthesizer PLL IC which is derived
from a 3.975 MHz crystal.
The uP sends a serial 24 bit code to the synthesizer PLL IC (last 20 bits used) to de-
termine the reference divide ratio. A serial 24 bit code (last 20 bits used) is also sent
to determine the divide ration of the “USE” frequency (when changed).
The increment/decrement switches send three pulses to the uP (up, pulse, down) in a
specific sequence to provide the code and validity check for increment and decrement
operations.
Display dimming controls are read through an analog to digital converter allowing the
aircraft lighting bus to dim the display.
The LCD display viewing angle is controlled by I801, which controls the display bias,
thereby controlling the display viewing angle based on inputs from R755, R802, and
Q803.