UBS Axcera 836A User Manual

INSTRUCTION MANUAL

836A

2000 WATT UHF

TRANSLATOR

AXCERA, LLC

103 FREEDOM DRIVE P.O. BOX 525 LAWRENCE, PA 15055-0525 USA

[phone] • FAX [phone]

www.axcera.com • [e-mail]

836A 2 kW UHF Television Translator, Internally Diplexed Table of Contents

1. Introduction:

2. System - 836A:
A. System Description

B. Specifications
C. Site Considerations
D. Unpacking and Installation Procedures
E. Translator Set Up and Operation Procedure
F. Meters, Switches and Indicators
G. Translator Detaile d Alignment Procedure
H. Remote Control Interface Connections
I. Drawings:

1. 2 kW Translator Block Diagram..................................................... 1276-3000

2. 2 kW Translator Interconnect ...................................................... 1276-8000

3. Remote Interface Assembly w/Moseley Interconnect ........................ 1276-8011

3. AC Distribution Assembly, Narrow
A. Drawings:

1. Interconnect ............................................................................ 1276-8200

4. UHF Exciter
A. Drawings:

1. Block Diagram........................................................................... 1265-3300

2. Interconnect ............................................................................ 1265-8300

5. VHF/UHF Receiver Tray
A. Drawings

1. Block Diagram........................................................................... 1265-3100

2. Interconnect ............................................................................ 1265-8100

6. UHF Amplifier Tray
A. Drawings:

1. Block Diagram........................................................................... 1281-3100

2. Interconnect ............................................................................ 1281-8100

7. Subassemblies:

Refer to the Subassembly Section of the Instruction Manual for the Schematics, of the
Boards and Modules that make up the 836A. A Subassembly Drawing List, which is a list of
the drawings in the order they appear in the Section, is located in the front of the
Subassembly Section.

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836A 2 kW UHF Television Translator, Internally Diplexed Table of Contents

8. Maintenance:

This section contains information on the operation and maintenance of the 836A. This
section contains information on the Plugs, Jacks, Sockets and Pins that make up the
Harness and Cable Assemblies in the 836A.

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FF WARNING!!!

×× HIGH VOLTAGE ØØ

DO NOT ATTEMPT TO REPAIR OR TROUBLESHOOT THIS EQUIPMENT
UNLESS YOU ARE FAMILIAR WITH ITS OPERATION AND EXPERIENCED
IN SERVICING HIGH VOLTAGE EQUIPMENT. LETHAL VOLTAGES ARE
PRESENT WHEN POWER IS APPLIED TO THIS SYSTEM. IF POSSIBLE,
TURN OFF POWER BEFORE MAKING ADJUSTMENTS TO THE SYSTEM.

«« RADIO FREQUENCY RADIATION HAZARD ««

MICROWAVE AMPLIFIERS AND TUBES GENERATE HAZARDOUS RF
RADIATION WHICH CAN CAUSE SEVERE INJURY INCLUDING
CATARACTS, WHICH CAN RESULT IN BLINDNESS. SOME CARDIAC
PACEMAKERS MAY BE AFFECTED BY THE RF ENERGY EMITTED BY
MICROWAVE AMPLIFIERS. NEVER OPERATE A MICROWAVE SYSTEM
WITHOUT A PROPERLY MATCHED RF ENERGY ABSORBING LOAD
ATTACHED. KEEP PERSONNEL AWAY FROM OPEN WAVEGUIDES AND
ANTENNAS. NEVER LOOK INTO AN OPEN WAVEGUIDE OR ANTENNA.
MONITOR ALL PARTS OF THE RF SYSTEM FOR RADIATION LEAKAGE
AT REGULAR INTERVALS.

EMERGENCY FIRST AID INSTRUCTIONS

Personnel engaged in the installation, operation, or maintenance of this equipment are urged to become
familiar with the following rules both in theory and practice. It is the duty of all operating personnel to be
prepared to give adequate Emergency First Aid and thereby prevent avoidable loss of life.

RESCUE BREATHING

1. Find out if the person is

breathing.

You must find out if the person
has stopped breathing. If you
think he is not breathing , place
him flat on his back. Put your
ear close to his mouth and look
at his chest. If he is breathing
you can feel the air on your
cheek. You can see his chest
move up and down. If you do
not feel the air or see the chest
move, he is not breathing.

SKIN REDDENED: Apply ice cold water to burned
area to prevent burn from going deeper into skin
tissue. Cover area with clean sheet or cloth to
keep away air. Consult a physician.

SKIN BLISTERED OR FLESH CHARRED: Apply ice
cold water to burned area to prevent burn from
going deeper into skin

2. If he is not, open the airway
by tilting his head backwards.

Lift up his neck with one hand
and push down on his forehead
with the other. This opens the
airway. Sometimes doing this
will let the person breathe
again by himself. If is does not,
begin rescue breathing.

3. If he is still not breathing,
begin rescue breathing.

-Keep his head tilted backward.
Pinch nose shut.

-Put your mouth tightly over his
mouth.

-Blow into his mouth once
every five seconds

-DO NOT stop rescue breathing
breathing until help comes.

LOOSEN CLOTHING - KEEP
WARM

Do this when the victim is
breathing by himself or help is
available. Keep him as quiet as
possible and from becoming
chilled. Otherwise treat him for
shock.

BURNS

tissue. Cover area with clean sheet or cloth to
keep away air. Treat victim for shock and take
to hospital.

EXTENSIVE BURN - SKIN BROKEN: Cover area
with clean sheet or cloth to keep away air. Treat
victim for shock and take to hospital.

LIMITED WARRANTY

ONE YEAR

Seller warrants each new product manufactured and sold by Seller against
defects in material and workmanship under normal use and service, for a
period of one (1) year from the date of shipment from Seller's plant, when
operated in accordance with Seller's operating instructions. This warranty
shall not apply to tubes, fuses, batteries, or bulbs.

Warranties are valid only when and if (a) Seller receives prompt written
notice of breach within the period of warranty, (b) the defective product is
properly packed and returned by the Buyer (transportation and insurance
prepaid), and (c) Seller determines, in its sole judgment, that the product is
defective and not subject to any misuse, neglect, improper installation,
negligence, accident, or (unless authorized in writing by Seller) repair or
alteration. Seller's exclusive liability for any personal and/or property damage
(including direct, consequential or incidental) caused by the breach of any or
all warranties, shall be limited to the following: (a) repairing or replacing (in
Seller's sole discretion) any defective parts free of charge (F.O.B. Seller's
plant), and/or (b) crediting (in Seller's sole discretion) all or a portion of the
purchase price to the Buyer.

Equipment furnished by Seller, but not bearing its trade name, shall bear no
warranties other than the special hours-of-use or other warranties extended
by or enforceable against the manufacturer at the time of delivery to the
buyer. NO WARRANTIES, WHETHER STATUTORY, EXPRESSED OR

IMPLIED, AND NO WARRANTIES OF MERCHANTABILITY, FITNESS FOR
ANY PARTICULAR PURPOSE, OR FREEDOM FROM INFRINGEMENT, OR THE
LIKE, OTHER THAN AS SPECIFIED IN PATENT LIABILITY ARTICLES, AND
IN THIS ARTICLE, SHALL APPLY TO THE EQUIPMENT FURNISHED
HEREUNDER.

))MATERIAL RETURN PROCEDURE

In order to efficiently handle equipment or components returned for repair or sent out on loan,
Axcera requests that each returned item be accompanied by a Material Return Authorization
Number (MRA#).

To obtain an MRA follow the procedures below:

pp Call Axcera Customer Service at (724)-873-8100

or FAX [phone]

pp A Service Engineer will provide you with an MRA#

pp Write the MRA# on the packing list or in the case of repairs, a

note describing the reason for return. Also, be sure to include contact
information.

pp Send ALL MRA items to the following address

Axcera, LLC

103 Freedom Drive P.O. Box 525

Lawrence, PA 15055-0525

%% TELEPHONE TECHNICAL SUPPORT

Axcera currently provides free telephone technical support. When calling, be prepared to
provide the following information:

pp Transmitter model # AND Serial #

pp Status of front panel LED’s (are any red LED’s on ?)
pp Have a copy of your operation manual ready prior to calling

From 8:00 AM - 5:00 PM EST call [phone] for technical support

..PROPER PACKING OF MATERIALS

When returning materials to Axcera, it is extremely important to pack them properly. Due to the
delicate nature of components contained within the equipment, major damage can occur without
proper packing. Please adhere to the following guidelines when returning materials.

oo Save the boxes that the transmitter is shipped in. Each tray is sent
double boxed and enclosed in foam padding. Use the same packing
method when returning materials.

Failure to properly pack any returned materials may result in damage to the
equipment. Axcera is not responsible for damaged equipment under these
circumstances. Many freight companies will not compensate for damages when items
are not packed properly. Please pack items properly!

dBm, dBw, dBmV, dBµµV, AND VOLTAGE EXPRESSED IN WATTS

50 ohm system

WATTS PREFIX dBm dBw dBmV dBµV VOLTAGE

1,000,000,000,000 1 TERAWATT +150 +120
100,000,000,000 100 GIGAWATTS +140 +110
10,000,000,000 10 GIGAWATTS +130 +100
1,000,000,000 1 GIGAWATT +120 + 99
100,000,000 100 MEGAWATTS +110 + 80
10,000,000 10 MEGAWATTS +100 + 70
1,000,000 1 MEGAWATT + 90 + 60
100,000 100 KILOWATTS + 80 + 50
10,000 10 KILOWATTS + 70 + 40
1,000 1 KILOWATT + 60 + 30
100 1 HECTROWATT + 50 + 20
50 + 47 + 17
20 + 43 + 13
10 1 DECAWATT + 40 + 10
1 1 WATT + 30 0 + 77 +137 7.07V

0.1 1 DECIWATT + 20 - 10 + 67 +127 2.24V

0.01 1 CENTIWATT + 10 - 20 + 57 +117 0.707V

0.001 1 MILLIWATT 0 - 30 + 47 +107 224mV

0.0001 100 MICROWATTS - 10 - 40

0.00001 10 MICROWATTS - 20 - 50

0.000001 1 MICROWATT - 30 - 60

0.0000001 100 NANOWATTS - 40 - 70

0.00000001 10 NANOWATTS - 50 - 80

0.000000001 1 NANOWATT - 60 - 90

0.0000000001 100 PICOWATTS - 70 -100

0.00000000001 10 PICOWATTS - 80 -110

0.000000000001 1 PICOWATT - 90 -120

TEMPERATURE CONVERSION

°°F = 32 + [(9/5) °°C]

°°C = [(5/9) (°°F - 32)]

USEFUL CONVERSION FACTORS

TO CONVERT FROM TO MULTIPLY BY

mile (US statute) kilometer (km) 1.609347
inch (in) millimeter (mm) 25.4
inch (in) centimeter (cm) 2.54
inch (in) meter (m) 0.0254
foot (ft) meter (m) 0.3048
yard (yd) meter (m) 0.9144
mile per hour (mph) kilometer per hour(km/hr) 1.60934
mile per hour (mph) meter per second (m/s) 0.44704
pound (lb) kilogram (kg) 0.4535924
gallon (gal) liter 3.7854118
U.S. liquid

(One U.S. gallon equals 0.8327 Canadian gallon)

fluid ounce (fl oz) milliliters (ml) 29.57353
British Thermal Unit watt (W) 0.2930711

per hour (Btu/hr)

horsepower (hp) watt (W) 746

NOMENCLATURE OF FREQUENCY BANDS

FREQUENCY RANGE DESIGNATION

3 to 30 kHz VLF - Very Low Frequency
30 to 300 kHz LF - Low Frequency
300 to 3000 kHz MF - Medium Frequency
3 to 30 MHz HF - High Frequency
30 to 300 MHz VHF - Very High Frequency
300 to 3000 MHz UHF - Ultrahigh Frequency
3 to 30 GHz SHF - Superhigh Frequency

30 to 300 GHz EHF - Extremely High Frequency

LETTER DESIGNATIONS FOR UPPER FREQUENCY BANDS

LETTER FREQ. BAND

L 1000 - 2000 MHz
S 2000 - 4000 MHz
C 4000 - 8000 MHz
X 8000 - 12000 MHz
Ku 12 - 18 GHz
K 18 - 27 GHz
Ka 27 - 40 GHz
V 40 - 75 GHz
W 75 - 110 GHz

ABBREVIATIONS/ACRONYMS

AC Alternating Current

AFC Automatic Frequency Control

ALC Automatic Level Control

AM Amplitude modulation

AGC Automatic Gain Control

AWG American wire gauge

BER Bit Error Rate

BW Bandwidth

DC Direct Current

D/A Digital to analog

dB Decibel

dBm Decibel referenced to 1 milliwatt

dBmV Decibel referenced to 1 millivolt

PCB Printed circuit board

QAM Quadrature Amplitude Modulation

dBw Decibel referenced to 1 watt

FEC Forward Error Correction

FM Frequency modulation

Hz Hertz

ICPM Incidental Carrier Phase Modulation

I/P Input

IF Intermediate Frequency

LED Light emitting diode

LSB Lower Sideband

MPEG Motion Pictures Expert Group

O/P Output

PLL Phase Locked Loop

R
E
T
U
R
N

RETURN LOSS VS. VSWR

0

-10

-20

-30

dB

L
O
S

-40

-50

-60

-70

1.001 1.01 1.1 2.0

VSWR

836A 2 kW UHF Translator, Internally Diplexed System Description

The 836A is a complete 2 kW UHF Solid State Internally Diplexed Television Translator which
operates at a nominal Visual Output Power of 2000 Watts Peak of Sync and with an Average Aural
Output Power of 200 Watts at an A/V Ratio of 10 dB, 10 % Sound. The Translator uses the
combined IF Output of the Receiver Tray as the input to the UHF Exciter Tray.

The 836A (1078476) is functionally comprised of (A4) the UHF Exciter (1300-1020), (A3) the
VHF/UHF Receiver Tray (1265-1100), (A5) the 4 Way Splitter Assembly, (A6, A7, A8 & A9) four
UHF Amplifier Trays (1294-1112, 1294-1113 or 1294-1114), (A10 & A11) two UHF Tee Assemblies,
(A12) a Hybrid Combiner , (A13) a Bandpass Filter, (A14) an (Optional) UHF Trap Filter, (A16) a
Coupler Assembly, (A2) an AC Distribution Assembly (1276-1200) and (A17) an (Optional) A/V
Input & Remote Interface Assembly (1276-1008) or a Remote Interface Assembly w/Moseley
(1314-1008).

The (A3) VHF/UHF Receiver Tray (1265-1100) takes the On Channel RF Input, which connects to
J5 for 75Ω or J1 for 50Ω on the rear of the Tray and generates a Modulated Diplexed IF Output.
The Combined IF from J4 connects to the J6 on the (A4) UHF Exciter Tray (1265-1300) which
upconverts the signal to the On Channel Frequency Visual + Aural RF Output. The RF Output of
the UHF Exciter at J15 is split four ways by (A5) the Four Way Splitter Assembly (ZFSC-4-1SMA).
The outputs of the Splitter feed to J1 on the four (A6, A7, A8 & A9) UHF Amplifier Trays. The RF
outputs of the (A8 & A9) UHF Amplifier Trays are combined in the (A11) UHF Tee Assembly and the
outputs of the (A6 & A7) UHF Amplifier Trays are combined in the (A10) UHF Tee Assembly. The
Combined Outputs of each UHF Tee are combined in (A12) a Hybrid Combiner. A 500 Watt Dummy
Load (A18) is connected to the Hybrid Combiner and provides Transmitter protection, using the
Thermal Switch (A18-A1), in case of misalignment in the combining or a malfunction in the UHF
Amplifier Trays which causes overtemperature. The RF output of the Hybrid Combiner is connected
to (A13) a Bandpass Filter, and then either directly to (A16) an Output Coupler Assembly or
through (A14) an (Optional) One Section or Two Section UHF Trap Filter. The 7/8” RF Output at
J2 of the Coupler is the output of the Translator. The (A16) 7/8" Coupler Assembly supplies a
Forward Power Sample and a Reflected Power Sample to the Visual/Aural Metering Board located in
the UHF Exciter. The Samples are peak detected and wired to the Transmitter Control Board which
connects the Visual, Aural and Reflected Power Output Samples to the front panel Meter on the
Exciter for monitoring.

The Combined Visual IF + Aural IF Input (0 dBm Typical) from the Receiver Tray connects to J6 on
the UHF Exciter Tray. The Combined IF is cabled to the (A8) ALC Board (1265-1305) which gives
the operator control over the output power level of the Translator by adjusting the level of the
combined IF Signal. The IF Signal is fed out of the ALC Board to (A9) an IF Phase Corrector Board
(1227-1250) that is adjusted for best signal and then back to the ALC Board.

Upconverter Section

The output of the ALC Board (0 dBm) connects to (A11) the UHF Upconverter Board (1265-1310),
located in the Upconverter Section, which takes the L.O. and heterodynes it with the Combined IF,
that is then filtered to produce the RF On Channel Output. The crystal frequency needed to
generate the L.O. is produced by (A14-A1) the Channel Oscillator Board (1145-1201) located in
(A14) the Channel Oscillator Assembly (1145-1202) or if the Optional FSK Identifier Kit is
purchased, by the VCXO Channel Oscillator Board (1145-1204) located in the VCXO Channel
Oscillator Assembly (1145-1206). The Crystal Frequency (+5 dBm) is multiplied 8 times by (A15­A1) the x8 Multiplier Board (1227-1002), located in (A15) the x8 Multiplier Enclosure (1265-1347),
which produces the L.O. Signal at the proper frequency (+16 dBm) needed in the upconversion
process that takes place on the UHF Upconverter Board. The L.O. is filtered by (A16) a UHF Filter
(1007-1101) before it is applied to the UHF Upconverter Board. The L.O. is mixed with the IF to
produce an On Channel RF Output that is filtered by (A12) a UHF Filter (1007-1101) and connected
back to the Upconverter Board. The RF is connected through an AGC circuit and is amplified
before it is attached to the output of the board.

- Page 1 of 3 -

836A 2 kW UHF Translator, Internally Diplexed System Description

Output RF Section

The RF Output of the UHF Exciter is split four ways in (A5) the 4 Way Power Splitter Assembly
(ZFSC-4-1SMA). The outputs of the Splitter feed the four (A6, A7, A8 & A9) UHF Amplifier Trays
which amplify the RF signals to approximately 600 Watts each. A Forward Power Sample from the
4 Way Combiner Board inside the Tray is connected to the Dual Peak Detector Board which
provides a peak detected forward sample to the Amplifier Control Board that supplies the sample to
the front panel meter of the UHF Amplifier Tray. Before exiting each UHF Amplifier Tray the RF is
fed through a Circulator for protection of the Tray from high VSWR conditions. The Reject Port of
the Circulator provides a Reject Sample to the 4 Way Combiner Board, which supplies the Reflected
Sample to the Dual Peak Detector Board. The peak detected Reflected Sample connects to the
Amplifier Control Board that provides the sample to the front panel meter of the Tray. The outputs
of the two (A6 & A7) UHF Amplifier Trays are then combined in (A10) a UHF Tee Assembly (1227­1017 L.B., 1227-1018 M.B. or 1227-1019 H.B.) that provides approximately 1100 Watts Peak of
Sync Output. The outputs of the other two (A8 & A9) UHF Amplifier Trays are then combined in
(A11) a UHF Tee Assembly (1227-1017 L.B., 1227-1018 M.B. or 1227-1019 H.B.) that provides
approximately 1100 Watts Peak of Sync Output. The two 1100 Watts Outputs then combined in
(A12) a Hybrid Combiner that provides approximately 2200 Watts Peak of Sync Output. The
combined output is connected to (A13) a Bandpass Filter, then either through (A14) an (Optional)
One Section or Two Section Trap Filter or directly to (A16) the Output Coupler Assembly to the
output of the System. The Bandpass Filter and Trap Filter are tuned to provide high out of band
rejection of unwanted products. The (A16) 7/8" Coupler Assembly provides a Forward Power
Sample and a Reflected Power Sample. The Forward and Reflected Samples are cabled to the
Visual/Aural Metering Board located in the UHF Exciter. The Forward and Reflected Samples are
processed to provide peak detected Visual and an Aural Power Output Samples to the Transmitter
Control Board. The Transmitter Control Boards connect the Visual, Aural and Reflected Power
Output Samples to the front panel Meter for monitoring.

Control and Status

The Meter and the LED indicators located on the front panel of the UHF Exciter provide the Control
and the Status Indications of the Translator. The switches and LED indicators are part of the
Transmitter Control Board (1265-1311) which is mounted so that the switches and the LEDs are
operated or viewed from the front Panel of the UHF Exciter. Switch (S1) is an Operate/Standby
Switch that controls the output of the Translator by providing the Enables, when in Operate,
needed to turn on the Switching Power Supplies in the four UHF Amplifier Trays. In Operate the
Green LED (DS2) is On and when in Standby the Amber LED (DS1) is On. If the Translator does
not switch to Operate, when S1 is switched to Operate, check that a Dummy Jumper Plug, with a
Jumper between Pins 23 & 24 is connected to J11 on the rear of the UHF Exciter Tray or with a
jumper between Pins 21 & 22 on Jack J9 on (A17) the (Optional) A/V Input & Remote Interface
Panel. This Jumper provides the Interlock needed for the Translator to operate. If the Interlock is
present the Green LED (DS5), located on the Transmitter Control Board, should be lit.

Switch (S2) is an Automatic/Manual Switch that controls the operation of the Translator by the
presence of the Input Signal. When the switch is in Automatic the Green LED (DS3) is lit and if the
Input Signal to the Translator is lost, the Translator will automatically switch to Standby. When
the Input Signal returns the Translator will automatically switch back to Operate. In Manual,
Amber LED (DS4) lit, the Operation of the Translator is controlled by the front panel switches.
During Normal operation of the Translator Switch S2 should be in the Auto position. The front
panel of the UHF Exciter also has LEDs that indicate a Video Fault (Loss), Red LED (DS9) and a
VSWR Cutback, Amber LED (DS7).

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836A 2 kW UHF Translator, Internally Diplexed System Description

Operation of the Translator

The Translator needs an AC input of 220 VAC at 80 Amps connected to it in order to operate. The
220 VAC Input connects to the Terminal Block (TB1), located in the upper right rear of the
Cabinet, that is part of (A2) the AC Distribution Panel (1276-1200). The AC Distribution Panel
contains Six Circuit Breakers that supply the AC to the rest of the Translator.

The Input AC from TB1 is connected to (CB1) the Main AC Circuit Breaker (80 Amps) which
distributes the 220 VAC to the Terminal Block (TB2). TB2 has three MOVs, mounted to the
Terminal Block, one connected from each leg of the Input AC to ground and one across the two
legs. The Input AC is wired from TB2 through five Circuit Breakers, CB2, CB3, CB4, CB5 & CB6 to
the rest of the Translator. CB2 (10 Amps) supplies the AC voltage to the IEC Outlet Strip (A1)
into which the UHF Exciter, the Optional Receiver Tray and any other Optional Accessories are
connected. CB3 (20 Amps) supplies AC through J5 to the (A6) UHF Amplifier Tray. CB4 (20 Amps)
supplies AC through J6 to the (A7) UHF Amplifier Tray. CB5 (20 Amps) supplies AC through J7 to
the (A8) UHF Amplifier Tray. CB6 (20 Amps) supplies AC through J8 to the (A9) UHF Amplifier Tray.
When the UHF Exciter circuit breaker is switched On, +12 VDC is supplied to the UHF Amplifier
Trays for operation of the LED Status Indicators in the Tray.

Input and Remote Connections

The On Channel RF Input from the Antenna connects to J5 for 75Ω or J1 for 50Ω located on the
rear of the VHF/UHF Receiver Tray. Jacks J10 and J11 on the rear of the UHF Exciter provides
connections for Remote Monitoring and Operation of the Translator. Jack (J11) should have a
dummy plug connected to it which has a jumper between Pins 23 & 24 that provides the Interlock
needed to operate the Translator. If remote connections are made to the Translator they should
be made through the plug in J10 or J11 in the positions noted on the Interconnect Drawing (1276-

8000).
The (Optional) Remote Interface Assembly, if present, provides connections for Remote Monitoring

and Operation of the Translator at Jack (J9 & J10). Jack (J9) should have a dummy plug
connected to it which has a jumper between Pins 21 & 22 that provides the Interlock needed to
operate the Translator. If remote connections are made to the Translator they should be made
through the plug in J9 or J10 in the positions noted on the Interconnect Drawing (1276-8000).

Instruction Manual Description

The Instruction Manual is divided into sections that are labeled as to their contents. The first
main section is the System Section that contains the Parameters and Specifications of the 836A
along with the Site Preparation, Installation, System Set Up, Alignment and Operation Procedures.
The Block Diagram and Interconnect for the Translator are also found in the System Section.

The Manual is further divided into Tray and Assembly Sections. Each Tray or Assembly Section of
the Manual contains the Block Diagrams, Control Location Drawings and Interconnects of that
Assembly or Tray. Each of the Sections also contains the Circuit Descriptions and Detailed
Alignment Procedures for that Tray or Assembly.

The Schematics, Parts Location Drawings and the Replacement Parts Lists for the individual boards
that make up the Trays and Assemblies in the Translator are located in the Subassembly Section
of the Manual. There is a Drawing List at the beginning of the Subassembly Section that lists the
drawings in the order they appear in the section.

- Page 3 of 3 -