EG&G ORTEC 775 Service manual

rsj
^77^ yn
Models 775 and 775H
Counters
I.V»- j;..;:- 'i-- -.vs" -■■ ■■ ■ '

ORTEC 775 COUNTER
Manual Change Sheet April 30, 1974
REV 04
On schematic 775-0101-Sl included at the back of the manual, change
the reference designation for the IK front panel Discriminator control
from R65 to R68. This is a correction in the schematic only.
March 14, 1975
REV 06
On the Replaceable Parts List, page 10, change the listing for LED3 to:
LED3 9103 60283 LED, Numeric Display, 7-segment (6 each)
Monsanto MAN-3M
On schematic 775-0101-81, change the type designation for LED3 from
TIL360 to (6 each) MAN-3M.

Models 775 and 775H
Counters
Operating and Service Manual
This manual applies to instruments
"Rev 03" (on rear panel)
Printed in U.S.A. Copyright ORTEC I ncorporated 1973 1707 050 0174

STANDARD WARRANTY FOR ORTEC INSTRUMENTS
ORTEC warrants its instruments other than preamplifier
FET input transistors, vacuum tubes, fuses, and batteries to
be free from defects in workmanship and materials for a
period of twelve months from date of shipment provided
that the equipment has been used in a proper manner and
not subjected to abuse. Repairs or replacement, at ORTEC
option, will be made on in-warranty instruments, without
charge, at the ORTEC factory. Shipping expense will be to
the account of the customer except in cases of defects
discovered upon initial operation. Warranties of vacuum
tubes and semiconductors made by their manufacturers will
be extended to our customers only to the extent of the
manufacturers' liability to ORTEC. Specially selected
vacuum tubes or semiconductors cannot be warranted.
ORTEC reserves the right to modify the design of its
products without incurring responsibility for modification
of previously manufactured units. Since installation condi
tions are beyond our control, ORTEC does not assume any
risks or liabilities associated with methods of instal lation or
with installation results.
advance of its return. ORTEC must be informed, either in
writing or by telephone [[phone] ], of the nature of
the fault of the instrument being returned and of the
model, serial, and revision ("Rev" on rear panel) numbers.
Failure to do so may cause unnecessary delays in getting
the unit repaired. Our standard procedure requires that
instruments returned for repair pass the same quality
control tests that are used for new-production instruments.
Instruments that are returned should be packed so that
they will withstand normal transit handling and must be
shipped PREPAID via Air Parcel Post or United Parcel
Service to the nearest ORTEC repair center. Instruments
being returned that are damaged in transit due to inade
quate packing will be repaired at the sender's expense, and
it wil l be the sender's responsibility to make claim with the
shipper. Instruments not in warranty will be repaired at the
standard charge unless they have been grossly misused or
mishandled, in which case the user wil l be notified prior to
the repair being done. A quotation will be sent with the
notification.
QUALITY CONTROL
Before being approved for shipment, each ORTEC instru
ment must pass a stringent set of quality control tests
designed to expose any flaws in materials or workmanship.
Permanent records of these tests are maintained for use in
warranty repair and as a source of statistical information
for design improvements.
REPAIR SERVICE
If it becomes necessary to return this instrument for repair,
it is essential that you contact our Customer Services in
DAMAGE IN TRANSIT
Shipments should be examined immediately upon receipt
for evidence of external or concealed damage. The carrier
making delivery should be notified immediately of any such
damage, since the carrier is normally liable for damage in
shipment. Packing materials, waybills, and other such
documentation should be preserved in order to establish
claims. After such notification to the carrier, please notify
ORTEC of the circumstances so that we may assist in
damage claims and in providing replacement equipment if
necessary.

CONTENTS
Page
WARRANTY "
PHOTOGRAPHS 'V
1. DESCRIPTION 1
2. SPECIFICATIONS 1
2.1. Performance ^
2.2. Indicators "I
2.3. Controls 1
2.4. Connectors 1
2.5. Electrical and Mechanical 2
3. INSTALLATION 2
3.1. General 2
3.2. Connection to Power 2
3.3. Signal Connections 2
4. OPERATING INSTRUCTIONS 3
4.1. Front Panel Controls and Indicators 3
4.2. Initial Operation of Counter 3
4.3. Counting Setup with One Counter 3
4.4. Counting Setup with 775 and 771 Timer-Counter 4
5. CIRCUIT DESCRIPTION 4
5.1. General Description 4
5.2. Pulse Input Circuit 4
5.3. Counting Decades 4
5.4. Reset Circuit 5
5.5. Internal Power Supply 5
6. MAINTENANCE 5
6.1. General 5
6.2. Fuse Replacement 5
6.3. Factory Repair 5
APPENDIX 6
Replaceable Parts
Schematic
775-0101-S1

"' y
ORTEC
' MODEL 775 €
COUNTER
Display
Overflow Tt-..i
DISCRIMINATOR
4. i 6
O.IV lOV
RESET
COUNT
ikfiix
®—
STOP
GATE
./>st .
" *'* .»t'%
/V- ■• ■:.:■:■■
INPUT
:.E!T
<£» &
IM'llT
liATE
o
I^ESET
vQ.
;)VEI^FL()'.V
o
ci>:w
•'*•••
'*>MO

ORTEC 775 and 776H COUNTERS
1. DESCRIPTION
The ORTEC 775 Counter is a general-purpose 6-decade
sealer with an adjustable input discriminator. It accepts and
counts positive pulses if their amplitudes exceed the
discriminator threshold setting, which has a range of 100
mV through 10 V. The input pulse pair resolution is <50
nsec, and the maximum counting rate is 20 MHz.
The 775 is packaged in a NIM-standard single-width
module. It includes all the connectors and controls for
either manual or automatic operation and indicates the
accumulated count with 7-segment l ight-emitting diodes
(LED's) in a direct-reading digital display.
A Gate LED indicator l ights to show when the 775 is in a
counting condition. The gate is controlled by both the
manual Count/Stop switch and the Gate signal input
circuit, with connectors on both the front and rear panels.
If the counter overflows, this condition is also shown by an
LED on the front panel; the indicator remains lit from the
first overflow until the unit is reset. At each overflow an
output pulse is also furnished through a rear panel
connector and may be used for connection into another
counter for an increased counting capacity.
Reset is generated automatical ly when power is first applied
and can be provided manual ly or by a signal through a rear
panel connector at any time, whether the unit is or is not in
a counting condition.
The 7-segment digital display can be tested at any time by
pressing the Test switch on the front panel . When this
switch is pressed, al l seven segments in each digit should
l ight to provide a reading of 888 888.
The 775H operates identically to the 775 but requires that
the bin and power supply in which it is operated furnish +6
V dc as a power source. The ORTEC 401B/402H Bin and
Power Supply is typical of the equipment required.
2. SPECIFICATIONS
2.1. PERFORMANCE
Count Capacity 6 decades, for 000 000 through 999 999.
Counting Rate 20 MHz guaranteed.
Input Discriminator Adjustable through range of +0.1 to
+10 V; drift <0.01% of ful l scale/°C, 0 to +50°C.
Automatic Clear Generated when power is turned on
initial ly or after a power fai lure.
2.2. INDICATORS
Readout Display 6 direct-reading 7-segment LED digits.
Overflow LED il luminated from first overflow unti l reset.
Gate LED il luminated whi le unit is in the counting
condition.
2.3. CONTROLS
Display Test Push-button switch l ights al l 7 segments of
each digit in the display when it is pressed for a reading of
Discriminator Single-turn potentiometer sets the discrimi
nation level for the positive input signal from 100 mV to
10 V.
Reset Push-button switch resets display and internal logic
to an initial condition when pressed.
Count/Stop Toggle switch selects counting or noncounting
condition of the unit manual ly.
2.4. CONNECTORS
Input Front and rear panel type BNC connectors accept
positive unipolar or bipolar signals to ±25 V maximum.
Input ampl itude must exceed adjusted threshold level for

20 nsec minimum to be counted. Zjp 1 kS2 to ground,
dc-coupled.
Gate Front and rear panel type BNC connectors accept
standard positive logic signal to control the counter gate
and the associated indicator. Open circuit or >+3 V to
al low counting; <+1.5 V to inhibit counting; 25 V
maximum; driving source must be capable of sinking 0.5
mA of positive current.
Reset Rear panel type BNC connector accepts standard
positive logic pulse to reset the unit to an initial zero
condition. >+3 V resets; <+1.5 V does not reset; 25 V
maximum; 100 nsec width minimum. 2 kfi dc-coupled
to ground.
Overflow Rear panel type BNC connector furnishes stand
ard positive logic output, +5 V for 2 /tisec, whenever the
counter overflows from 999 999 to 0. Driving source
impedance <1 Of2 dc-coupled.
2.5. ELECTRICAL AND MECHANICAL
Power Required For the 775 Counter: +25 V, 95 mA;
—1 2 V, 20 mA; 11 5 V ac, 50 mA, 50 or 60 Hz.
For the 775 H Counter: + 12 V, 95 mA; —12 V, 20 mA; +6
V, 550 mA.
Dimensions Standard NIM single-width module (1.35 by
8.714 in.) per TID-20893.
3. INSTALLATION
3.1. GENERAL
3.3. SIGNAL CONNECTIONS
The 775 operates on input power that must be furnished
from a Nuclear-standard Bin and Power Supply such as the
ORTEC 401/402 Series. If any vacuum tube equipment is
operated in the same rack with the 775, there must be
sufficient cool ing air circulating to prevent any local ized
heating of the integrated circuitry used throughout the 775.
The temperature of equipment mounted in racks can easi ly
exceed the maximum l imits of 120°F (50 C) unless
precautions are taken.
3.2. CONNECTION TO POWER
Turn off the Bin Power Supply when inserting or removing
any modules. The ORTEC modules are designed so that it is
not possible to overload the Power Supply with even a ful l
complement of modules in the Bin. Since, however, this
may not be true when the Bin contains modules other than
those of ORTEC design, the Power Supply voltages should
be checked after al l modules have been inserted. The
401/402 has test points on the Power Supply control panel
to permit monitoring the dc voltages easi ly.
The 775 requires 11 5 V ac as one of its power inputs. Some
bins and power suppl ies, as wel l as jumper cables, may not
be wired to include this power. In the event that the unit
fai ls to operate in a new instal lation, check the bin and/or
cable to determine whether the 11 5-V ac circuit is included.
The 775H version requires +6 V at 550 mA. It must be
used with an ORTEC 401 B/402H Bin and Power Supply or
equivalent to satisfy this power requirement. No ac power
is required for the 775H.
Count Input The signal to be counted by the 775 can be
connected to either the front or rear panel BNC connector.
These two connectors are not isolated from each other;
signals from two sources should not be used and connected
simultaneously to the two input connectors.
The input circuit of the 775 is dc-coupled to eliminate
basel ine shifts associated with changing counting rates. For
signals whose average dc level is greater than ±25 V,
external capacitive coupl ing must be provided by the user.
For dc levels below 25 V, connection can be made to the
input safely without damage to the 775. However, for the
sealer to count these signals there must be transitions of the
signals within the range of 0.1 to 10 V, since this is the
input range over which the discriminator operates.
The flexibi l ity of the 775 makes it possible to count almost
any signal wider than 20 nsec and greater than 100 mV in
ampl itude. There are two important points to remember
when supplying signals to the input: (1) The signal should
not cross the threshold level more than one time. Signals
with overshoot, ringing, etc. , wi l l be counted more than
once if the discriminator level is raised to the level at which
the perturbations occur. (2) Signals with slow rise and fall
times should be as clean (noise-free) as possible because of
the high gain and bandwidth of the 775 discriminator. As a
slow signal approaches the threshold, a smal l spurious noise
pulse can traverse the threshold and return, causing an extra
count to be added to the contents of the sealer.
Gate Input The Gate input signal can be connected to the
775 by either the front or rear panel BNC connector. As in

the case of the count input connectors, no isolation is
provided between the two inputs; so two signal sources
should not be connected simultaneously. When there is no
connection to the Gate input, the sealer gate permits the
unit to operate. To cut the gate off, the gate input must be
pul led down below +1.5 V but not below —5 V. To do this,
the driving circuit must be capable of absorbing 0.5 mA
from the gate input circuit. The gate input circuit permits
counting when the gate input is at +3 V or greater.
Reset Input A reset input signal can be connected to the
775 through the rear panel BNC connector. To reset the
sealer to zero, a positive signal of +3 V or greater
originating from zero potential with a minimum width of
100 nsec should be used. The input impedance is approxi
mately 2 kfZ dc-coupled to ground. Negative signals will not
perform any useful function at the reset input. The input
circuitry wi ll not be harmed as long as the input signal level
does not exceed ±25 V.
Overflow Output The overflow signal is available through
a rear panel BNC connector. A positive 5-V signal appears
at the output each time the contents of the counter change
from 999999 to zero. The output signal width is 2 /jsec. Zq
< 10Tl, dc-coupled.
4. OPERATING INSTRUCTIONS
4.1. FRONT PANEL CONTROLS AND INDICATORS
The following functions are indicated and controllable from
the front panel :
Count/Stop Manual ly controls counting of the 775; Count
position permits counting and Stop position inhibits
counting.
Gate Indicator An LED indicates the condition of the
input gate. When it glows, the 775 is able to count input
pulses. When it is dark, the 775 is inhibited from counting.
Reset A push-button switch resets the contents of the
counter to zero when it is depressed.
Discriminator A single-turn potentiometer selects the
threshold level of the internal discriminator with a range of
100 mV through 10 V. Normally, for counting logic signals,
the level should be adjusted about half way between the
lowest expected true signal amplitude and the maximum
false signal amplitude. For use with l inear signals assure that
the signals have only one point of inflection, or some
signals may cross the threshold more than one time and
produce erroneous results.
Overflow Indicator An LED l ights if the counter capacity
of 999 999 counts is exceeded, and remains l ighted unti l
the unit is reset.
Display Test A push-button switch permits a quick check
of the digital display. When it is pressed, all seven segments
of each of the six digits wi l l be lighted, regardless of the
counter contents, and the display wi ll read al l "eights."
Digital Display Six 7-segment characters with logically
selected blanking for each segment display the counter
contents at all times except during the Display Test
interval. Each character can display a digit from 0
through 9.
4.2. INITIAL OPERATION OF COUNTER
1. Install the 775 into a 401/402 Series Bin and Power
Supply or equivalent and turn on the power.
2. Press Reset. The display should now indicate that the
contents of the counter are zero.
3. Press Display Test. The display should read
and should return to 0 when the switch is released
4. Set the Count/Stop switch at Count, and the Gate
indicator should light. Set the switch at Stop, and the light
should go out.
5. Connect a signal to the Input connector.
6. Set the Count/Stop switch at Count.
7. Turn the Discriminator control counterclockwise unti l
the 775 starts to count.
8. Ground the Gate input and observe that counting stops
and that the indicator LED is not l ighted. Remove the
ground and restore the counting condition.
9. Set the Count/Stop switch at Stop, and counting should
stop and the indicator again not be l ighted.
4.3. COUNTING SETUP WITH ONE COUNTER
Proceed as outl ined in Section 4.2 but omit those steps
used in "testing" the instrument. Be sure that the input
signals do not exceed the ±25-V maximum limits.

4.4. COUNTING SETUP WITH 775 AND
771 TIMER-COUNTER
An ORTEC 771 Timer-Counter can be used to control the
time in a counting interval whi le input pulses are being
counted in the 775. The setup Is made by connecting a
cable from the Interval output BNC on the rear panel of the
771 to the Gate Input on either the front or rear panel of
the 775. This interconnection wil l al low the 775 to
accumulate input counts only during the interval when the
771 is counting time. Use theTol lowIng procedure:
1. On the 775 set the Count/Stop switch at Count.
2. With no Gate input connection and with the light
indicating that the 775 is in a counting condition, check to
see that Input pulses are able to be counted. Readjust the
Discriminator level if necessary.
3. Set the Count/Stop switch at Stop and press Reset.
4. Connect the Gate input cable from the 771 Interval
output to the 775 Gate input.
5. On the 771 set the Count/Stop switch at Stop.
6. On the 775 set the Count/Stop switch at Count.
7. The instruments are ready to be used. When the
counting interval is to be started, set the 771 Count/Stop
switch at Count, and both modules should be in a counting
condition. At the end of the selected time Interval on the
771, preset stop wil l affect both modules. To stop the
counting interval manual ly, use the Count/Stop switch on
the 771 and read the time for the interval on the 771.
If In the setup just described the 771 Timer-Counter had
been operated as a counter, the 775 data would have
represented the number of counts above its threshold per N
(preset condition) counts from another source Into the 771.
The ratio of two counting rates can be determined in this
manner.
5. CIRCUIT DESCRIPTION
5.1. GENERAL DESCRIPTION
The ORTEC 775 Counter is a 6-decade ripple sealer
preceded by a precise l inear discriminator and includes logic
for gating. An internal osci l lator drives a 7-state ring
scanner with a BCD-to-decimal decoder to control the
6-diglt LED display. See schematic 775-010TS1 at the back
of the manual for circuit detai ls.
5.2. PULSE INPUT CIRCUIT
Input signals in the range of 0.1 through 10 V can be
applied through either the front or rear panel BNC Input
connector. They are dc-coupled through divider R41 and
R42 to the positive input of comparator IC 24. The
negative Input to IC 24 is the dc level selected with
Discriminator control R65 on the front panel . Each input
pulse whose amplitude exceeds the discrimination level wi l l
generate a logic output from IC 24-7 to drive IC 9-8. If the
775 is not being reset and its Gate indicator l ight is l ighted,
the Input pulse becomes a clock pulse into the least
significant decade, IC 10, and Is counted.
With no Gate input signal and with switch S3 set at Count,
IC 19-6 is high and IC 20-8 is low, making IC 19-11 high
and permitting IC 9-6 to pass the Input pulse. If the switch
is set at Stop, IC 20-8 goes high and the gate is inhibiting.
Likewise, If there is a Gate input connection and the signal
is dropped to <+1.5 V, IC 20-8 goes high and the gate Is
inhibited. One of the functions of IC 19-11 is to drive the
input to IC 20-1 2 and l ight LED 1 when the gate is enabled.
During the interval of a reset signal, IC 21-11 goes low and
this drives IC 20-12 high and turns off LED 1 ; any input
during this interval wil l not be counted because IC 19-3 is
low and gate IC 9-6 inhibits the Input pulse.
5.3. COUNTING DECADES
The type 7490 circuits, IC 10 through IC 15, are the
counting decades. The gated Input pulses are used as clock
input pulses to IC 10, and the overflow from each of the
decades Is the clock pulse for the next more significant
decade. The overflow output from IC 15 triggers fl ip-flop
IC 22-11 and IC 22-8 to l ight LED 2 unti l the next reset.
The same pulse is shaped for an Overflow output signal
through CN6 by monostable Q16 and IC 23-8 and
emitter-fol lower 017. If there is more than one overflow,
each overflow wil l generate an output pulse.
The 1-2-4-8 BCD state of each decade is avai lable through
four output lines. The states of all four output l ines for each
decade are gated onto common l ines through IC 1 to IC 6.
Gating is control led by a ring scanner, and the coded
combination for each digit Is gated onto the common l ines
individual ly and sequential ly.
Osci l lator IC 23-2 and IC 23-4 is a free-running multi
vibrator with a period of about 1 msec. Its output is used to
drive the clock Input of decade counter IC 16. The BCD
output from IC 16 is decoded to decimal numbers in IC 8,
and each of the decoded states 0 through 5 enables the gate
for a selected decade and enables the comparable character

in LED 3 to display that digit. When IC 16 is advanced to a
state of 6, the decade is reset to zero through IC 22-3 and
IC 22-6 to start the scan again.
The four common l ines wi l l carry the BCD identification
for the selected decade into IC 17, which decodes the digit
for the 7-segment LED 3 character that is enabled by the
selection of IC 8. When al l seven segments of a character are
lighted, a digit 8 is formed in the display. Selective blanking
of the segments a through g forms any of the other 9 digits.
Segment a is across the top of the character, with segments
b through f clockwise around the border and segment g
across the center. When switch SI is pressed, al l seven
segments of al l characters are lighted for a test of the
display. IC 21-3 and IC 21-6 provide blanking for insignifi
cant zeros in the display.
(Local Reset) signal resets all counting decades to zero,
restores the fl ip-flop for LED 2 if it had been set during the
prior counting interval, inhibits acceptance of any input
pulses and turns off LED 1 through IC 20-12, and inhibits
the generation of an Overflow output pulse by the response
through IC 23-6.
5.5. INTERNAL POWER SUPPLY
An internal power supply is included to generate the +5-V
source for the integrated circuits. 115 V ac is appl ied to T1
and ful l-wave-rectified by D4, fi ltered by C18 and C19, and
regulated by Q18 through Q20. Fuse F1, 1.5 A, is mounted
in a fuseholder on the printed circuit board. The fuse
protects the +5-V source from overloads due to shorts in
the instrument.
5.4. RESET CIRCUIT
The 775 can be reset at any time by either pressing switch
S2 on the front panel or by furnishing a reset input pulse
through CN5 on the rear panel . Either of these conditions
makes IC 20-6 go high during the reset signal. The LR
The 775H Counter does not contain the portion of this
power supply that consists of T1, D4, C18, and C19. It
obtains its +5-V power from the +6-V source in the
ORTEC 401 B/402FI Bin and Power Supply. In this version
the collector of Q20 is connected to pin 10 of the rear
panel module power connector.
6. MAIIMTEIMANCE
6.1. GENERAL
The basic performance of the 775 Counter can be tested by
following the procedure outl ined In Section 4.2. This wil l
not check the unit to its publ ished specifications.
If the unit fails to respond properly during testing, use the
information in Section 5 to determine the fault. Schematic
775-0101-S1 at the back of the manual includes al l the
circuits in the unit.
6.2. FUSE REPLACEMENT
If the front panel display and indicators cannot be lighted,
remove the left side panel and inspect fuse F1. This fuse
protects the +5-V power source that is used for al l the
integrated circuits in the instrument, and the Indicators
cannot be lit unless the Integrated circuits are operating.
Replace the fuse with a type SAG fuse with a 1.5-A rating
only.
6.3. FACTORY REPAIR
The 775 can be returned to ORTEC for repair service at a
nominal cost. Our standard procedure requires that each
repaired instrument receive the same extensive qual ity
control tests that a new instrument receives. Please contact
our Customer Service Department at [phone] for
shipping instructions before returning the instrument.

APPENDIX
REPLACEABLE PARTS
ORDERING INFORMATION
The Replaceable Parts List shown below contains informa
tion needed for ordering spare and/or replacement parts.
Each listing indicates the reference designator number, the
part number, a description of the component, and the part
manufacturer and manufacturer's part number.
All inquiries concerning spare and/or replacement parts and
all orders for same should include the model serial, and
revision ("Rev" on rear panel) numbers of the instruments
involved and should be addressed to the Customer Service
Department at 100 Midland Road, Oak Ridge, Tennessee
37830. The Manager of Customer Services can be reached
by telephone at [phone]. The minimum order for
spare and/or replacement parts is $25.00.
ORDERING INFORMATION
FOR PARTS NOT LISTED
In order to facilitate the ordering of a part not listed below,
the following information should be submitted to the
Customer Service Department:
1. the instrument model number,
2. the instrument serial number,
3. revision ("Rev" on rear panel) number,
4. a description of the part,
5. information as to the function and location of the part.
The solid-state-device (diodes, transistors, and integrated circuits) types installed in your instrument
may differ from those shown in the schematic diagram and parts l ist. In such cases, necessary replace
ments can be made with either the type shown or the type actual ly installed in the instrument.
Replaceable Parts List
RtFERENCE
DESIGNATOR
ORTEC PART NO
DESCRIPTION
MFR.
MFR PART NO
775-0100
5OOI4 ^46193
CR1
9097 41339 ConiKctor. BNC. UG1094/U
95712
DCE
cm
9097 41339 Connector, BNC, UG1094/U
95712
DGE
cm
9097 41339
Connector, BNC, UC1094/U
95712 DCE
CM
9097 41339
Connector, BNC, UC1094/U
95712
DGE
CK
9097 41339
Connector, BNC, UC1094/U
95712
DCE
CN6
9097 41339
Connector, BNC, UG1094/U
95712
DCE
K65
9091 40801
IK 3W 57, Pot.
44655
OHM #RV4NAYSiPl02A (MIL)
SI
9094 41293
Switch, P-B, SPOT (Red)
82389
sue
S2
9094 41293
Switch, P-B, SPOT (Red)
82389
sue #953
S3
9094 41277 Swtich, Toggle, SPDT
95146
AEP #MST-105D
LEDl
9103 63798 LED Indicator W/Mount
72619
DIL #521-9166
LBD2
9103 63798
LED Indicator W/Mount
72619 DIL #521-9166

Replaceable Parts List (continued)
REFERENCE
DESIGNATOR
ORTEC PART NO
DESCRIPTION MFR.
MFR. PART NO.
775-0100-1
500ii '♦6196
Cl8
9067 147378
2200 uf 25V El,
FRAKO
FRAKO #B1735/2200/25(70)
C19 9067 147378
2200 uf 25V El.
FRAKO
FRAKO #B1735/2200/25(70)
Dlt
9080 1414206
F.W. Bridge
27777
VRO #VH2l47
T1 9090 61173 Transformer
07119
KMC #T-11*97
775-0200
5007 I4619I4
C1
90^9 I4O889
200 nf 500V 2% D.M. 81*171
ARC #DM1 5-201 G
C2
9059 I4O892
1*70 pf 5OOV 57o D.M.
8I4I71
ARC #DM15-l471J
C3 9065 I4O9I42
1 uf 35V 20% Tan.
80183
SPR #1500105X0035A2
Ck
9065 I4O9I42
1 uf 35V 20% Tan.
80183 SPR #1500105X0035A2
C5
9055 I4O855
0.01 uf 5OV 20% Disc.
80183 SPR #C023K101F103M
C6 9055 140855
0.01 uf 5OV 20% Disc.
80183 SPR #C023K101F103M
C7
9065 14951+2
6.8 uf 35V 20% Tan.
12951+
DCK #d68r8g5B35M
C8
9055 I4O855
0.01 uf 5OV 20% Disc.
80183 SPR #C023K101F103M
C9
9055 I4O855
0.01 uf 5OV 20% Disc.
80183 SPR #C023K101F103M
CIO
9065 I4O953
220 uf 10V 20% Tan.
80183
SPR #1500227X00152
C11
9065 I4O9I48
6.8 uf 35V 20% Tan.
80183 SPR #1500685x003562
C12
9065 1409148
6.8 uf 35V 20% Tan.
80183 SPR #1500685x003502
C13 9055 I4O855
0,01 uf 5OV 20% Disc. 80183
SPR #C023K101F103M
CII4
9055 I4O855
0.01 uf 5OV 20% Disc.
80183
SPR #C023K101F103M
C15 9055 1*0855
0.01 uf 5OV 20% Disc.
80183 SPR #C023K101F103M
CI6
9055 I4O855
0 01 uf 5OV 20% Disc.
80183 Sm #C023K101F103M
CI7
9055 1+0855
0.01 uf 5OV 20% Disc.
80183
SPR #C023K101F103M
C20
9059 40886
100 pf 500V 2% DM
84171
ARC #DM15-101G
D1
9080 1(1125 Diode - INI4OO9
11+1433
ITT
D2
9080 I4II25 Diode — 1N1|009
11*1*33
ITT
D3
9080 I4II25
Diode - 1Nlt009
11+1+33
ITT
F1
9101 I4I7I+7
Fuse, 1 .5 Amp, 250V
75915
LIT #312001 .5
IC-1 9079 I4I4O83
IC - SN7I4O3N
270II4
NSC
IC-2
9079 I4I+O83
IC - SN7I4O3K
27011*
NSC
IC-3 9079 1+1*083
IC - SN7I4O3N
27011*
NSC
IC-ir
9079 I4I4O83
IC - SN7I4O3N
27OII4
NSC
ic-5
9079 I4I4O83
IC - SN7I4O3N
27OII4
NSC
ic-6
9079 1+1+083
IC - SN7I4O3N
27OII4
NSC
lc-7
9079 1+1+079
IC - SN7l401*N
27OII4
NSC
ic-8
9079 1+91+95
IC - SN71+I42N
27OII4
NSC
lc-9
9079 1+1+081
IC - SN7I4ION
27011*
NSC

Replaceable Parts List (continued)
REFERENCE
DESIGNATOR
ORTEC PART NO DESCRIPTION
MFR.
MFR. PART NO
775-0200
5007 hSTSk
cont'd.
IC-10
9079 ltlt072
IC - SN7490N
27014
NSC
IC-1 1
9079 44072
IC - SN7490N
27014
NSC
IC-12
9079 44072
IC - SN7490N
27014
NSC
IC-1 3
9079 44072
IC - SN7490N
27014
NSC
IC-1/4
9079 44072
IC - SN749ON
27014
NSC
IC-1 5
9079 44072
IC - SN7490N
27014
NSC
IC-1 6
9079 44072
IC - SN7490N
27014
NSC
IC-1 7
9079 66152
IC - SN7448N
01295
TI
IC-1 8
9079 44079
IC - SN7404N
27014
NSC
IC-1 9
9079 44073
IC - SN7400N
27014
NSC
IC-20
9079 44081
IC - SN7410N
27014
NSC
IC-21
9079 44073
IC - SN7400N
27014
NSC
IC-22
9079 44073
IC - SN7400N
27014
NSC
IC-23
9079 44082
IC - SN7405N
27014
NSC
IC-24
9079 41815
IC - 710
13715
Fsc #U5B771039X
Q1
9078 43655
Transistor - MPS6531
80211
MOT
Q2
9078 43655
Transistor - MPS6531
80211
MOT
Q3
9078 43655 Transistor - HPS653I
80211
MOT
Oh
9078 43655
Transistor - M?S65JT
80211
MOT
05
9078 43655 Transistor - MPS6531 §021 1
MOT
06 9078 43655
Transistor - MPS6531 80211 MOT
07
9078 43655
Transistor - MPS653I 80211 MOT
q6
9078 43655
Transistor - MPS6531 80211 MOT
09
9078 43655
Transistor - MPS6531 80211
MOT
QIC
9078 43655
Transistor i- MPS6531
80211
MOT
Oil
9078 43655
Transistor - MPS6531 80211
MOT
012
9078 43655
Transistor - MPS653I
80211
MOT
013
9078 43655 Transistor - MPS6531
80211
MOT
01 If
9078 43655
Transistor - MPS6531
80211
MOT
015
9078 43655
Transistor - MPS653I
80211
MOT
016
9078 43651
Transistor - MPS3646
80211
MOT
017
9078 43655 Transistor - MPS6531 80211
MOT
018 9078 41083 Transistor - 2N3643
13715
FSC
019
9078 41070
Transistor - 2N3053
86684
RCA
020
9078 43682
Transistor - MJE3055 80211
MOT
Q21 9078 43655
Transistor - MPS653I
80211
MOT
R1
9015 40269
180 n 1/4W 5% C
01121
ABC CB
R2
9015 40233
2.4 K 1/4W 5% C
01121
ABC CB
R3
9015 40269
180 n 1 /4w 57o C
01121
ABC CB
Rlt
9015 40233
2.4 K 1 /4W 57o C
01121
ABC CB
R5
9015 40269
180 f? 1 /4W 57o C
01121
ABC CB
r6 q015 40233
2.4 K 1/4W 5% C
01121
ABC CB
R7
9015 40269
180 n 1/4W 5% C
01121
ABC CB

Replaceable Parts List (continued)
REFERENCE
DESIGNATOR
ORTEC
PART NO
DESCRIPTION
MFR
MFR PART NO
775-0200
5007
^♦619^
cont'd.
R8
9015 40233
2.4 K 1 /4W
5%
c
01 121 ABC CB
R9
9015
40269
180 n
1 /4w
57o
c
01 121
ABC
CB
RIO
9015
40233
2.4 K 1 /4w
5%
c
01121
ABC
CB
R11
9015 40269
180 n
1 /4w
57o
c
01121
ABC
CB
aia
9015 40233 2.4 K 1 /4W 5%
c 011 21 ABC
CB
9015
40269
180 f?
1 /4w
57v
c
01121
ABC
CB
Hlk
9015
40233
2.4 K
1 /4W
57o
c 01121
ABC CB
ni5
9015
40233
2.4 K 1 /4W
5%
c
01121
ABC CB
wt
9015
40287 1 .3 K
1 /4W
5%
c
01121
ABC
CB
117
9015
40233
2.4 K 1 /4W
57c
c
01121
ABC
CB
tl8
9015
40287
1 .3 K
1 /4W
57c
c
01121
ABC CB
119
9015 40233
2.4 K 1 /4W
57c
c
01121
ABC CB
RM
9015
40287
1.3 K
1 /4W
5'?(;
c
01121
ABC
CB
m
9015
40233
2.4 K
1/4J|(
57c
c
01121
ABC
CB
n
n
9015
40287
1 . 3 K
1 /4w
57o
c
01121
ABC
CB
b
9015
40233
2.4 K
1 /4W
57c
c
01121
ABC
CB
K
9015
40287
1 .3 K
1 /4W
57c
c
01121
ABC CB
iM
9015
40233
2.4 K
1 /4W
57c
c
01121
ABC CB
9015
40287 1 .3 K
1 /4w
57c
c
011 21 ABC
CB
9015
40224
820 n
1 /4w
5%
c
01121
ABC
CB
9015
40224
820 9
1 /4w
5%
c
01121
ABC
CB
119
9015
40231
2 K
1 /4w
5%
c
01121
ABC
CB
no
9015 40231
2 K
1 /4w
57c
c
01121
ABC
CB
131
9015
40231
2 K
1 /4w
57c
c
01121 ABC
CB
132
^15
40231
2 K
1 /4w
57c
c
01121
ABC
CB
R33
9027
40594
57.6 K 1 /8w
1%
MF
24546 CGW
C-4
R}H
9027
40598 34.8 K
1 /8w
1%
MF
24546
CGW C-k
R95
9027 40547
12.1 K
1 /8w
17c
MF
24546
CGW
C-k
R36
9015
40259
6.2 K
1 /4w
57c
C
01121
ABC
CB
R37
9015
40238 4.7 K
1 /4w
57c
C
01121 ABC CB
I13«
9015
40212 200 n
1 /4w
57c
C
01121
ABC
CB
R39
9027
40517
1.47 K
1 /8w
17
MF
24546
CGW
C-4
RkO
9027
40481
10 f?
1 /8w
17o
MF
24546
CGW
C-I4
9027
40510
51 1 0
1 /8w
U
MF
24546 CGW
C-4
Ri,? 9027
40510
511 0
1 /8w
17c
MF
24546
CGW
C-4
R'43
9015
40209
100 n
1 /4w
57„
C
01121 ABC
CB
Rifif
9015
43951
75 K
1 /4w
57o
C
01121
ABC
CB
RI45
9015 40287
1 .3 K
1 /4w
5%
C
011 21
ABC
CB
Rti6
9015
40220 510 Q
1 /4w
57c
C
01 121 ABC
CB
RUJ 9015
40226 1 K
1 /4w
57c
C
01121
ABC
CB
RU8
9015
40232
2.2 K
1 /4w
5%
C
01121 ABC
CB
Rk9
9015
40259
6.2 K
1 /4w
57c
C 01 1 21
ABC
CB
R50
9015
40235 3 K
1 /4w
57o
C
01121
ABC
CB
R51
9015
40212 200 n
1 /4w
57„
C
01 121 ABC
CB
R52
9015
40259
6.2 K
1 /4w
57o
C
01121
ABC
CB
R53
9015
40226 1 K
1 /4w
5%
C
011 21
ABC
CB
RSk
9015
43951
75 K
1 /4w
57o
C
01 121 ABC
CB
R55
9015
40226 1 K
1 /4w
57c
C
01121 ABC
CB
Rq6
9015
40238
4.7 K
1 /4w
57c
C
01 121
ABC
CB
R57
9015
40238
4.7 K
1 /4w
57c
C
01121 ABC
CB

10
Replaceable Parts List (continued)
REFERENCE
DESIGNATOR
ORTEC PART NO
DESCRIPTION
MFR. MFR. PART NO.
775-0200
5007 '•6194
cont'd
R58
9015 40245
10 K 1/4W 5% C
01121
ABC CB
R59 9015 40238
4.7 K 1/4W 57o c
01121
, ABC CB
r60
9015 40238
4.7 K 1/4W 5% C
01121
ABC CB
r61
9015 40209
100 f? 1 /4W 57„ C
01121
ABC CB
r62
9015 40227
1 . 1 K 1/4w 5% C
01121
ABC CB
r63 9027 40520
1.78 K 1/8w r/„ MF 24546
CGW C-4
R6i4
9027 43710
5.23 K 1/8W 1% MF
24546
CGW C-4
r66
9015 40221
fi ?0 Q 1 /4W 57o C
01121
ABC CB
r67
9015 40235
3 K 1/4W 5% C
01121
ABC CB
775-0300 5007 46195
LED 3
9103 63800
LED, Numeric Display
01295
Til #T1XL360
7-Segment
BIN/MODULE CONNECTOR PIN ASSIGNMENTS
FOR AEC STANDARD NUCLEAR INSTRUMENT MODULES
PER TID-20893
Pin Function
Pin
Function
1
+3 volts 23 Reserved
2 —3 volts
24
Reserved
3
Spare Bus
25 Reserved
4
Reserved Bus 26
Spare
5
Coaxial 27 Spare
6 Coaxial *28
+24 volts
7
Coaxial *29
—24 volts
8 200 volts dc 30
Spare Bus
9
Spare
31
Spare
10 +6 volts 32
Spare
11
—0 volts *33 11 5 volts ac (Hot)
12 Reserved Bus *34
Power Return Ground
13
Spare
**35
Reset (Sealer)
14 Spare
**36
Gate
15 Reserved
**37 Reset (Auxiliary)
16 + 12 volts 38
Coaxial
17
—12 volts
39 Coaxial
18
Spare Bus
40 Coaxial
19
Reserved Bus
*41 115 volts ac (Neut.)
20
Spare
*42
High Qual ity Ground
21
Spare G Ground Guide Pin
22
Reserved
Pins marked (*) are installed and wired in ORTEC 401A and 401 B Modular System Bins.
Pins marked (*) and (**) are installed and wired in EG&G/ORTEC—HEP M250/N and M350/N NIMBINS.

+
u
M
J
-P?67l-
Q
u
IC
25
/C
zz
/C
2/
IC
20
tc
19
—mzK)
775-02OI@
JL
/C
/&
55TT-TT
A
M
I/I
/c
/c
/C
/c
/c
/O
/C
/O
S
7
<2>
5
4
a
E
/
/c
/c
/C
/C
/C /C
IC
iC
/6
/5
1^
/3
/2
//
/O
9
/C
/7
(D
(D
(!)
E)
ID
ID
iSiii
ttttt
DDE)®
—re?2T—
—fgWT—
T
N
v5
V
1
on
q
r\
e
S]
TT

C/=.R)
^59 issa
[
i-SV
\0V6R^L0¥^
I i£0 2 0
f.) ^ <
T;.e "jTs J.oT J'iJ J.or -J-.oT -p
CA/<£
Gve/z^iot/v
ce R)
CN!
INPUT
(F-P.)
T<tOO
^£7
4Jf<
ICZ^
CN3
INPUT
(r.
& 2<
14^0
IC24
UAT/O
+IZV
DlideiMiNATOH.
k k40
ICI3
/c/s
r<t9o
IC/f-
/<J90
740(5
'02 \IC2 \ ICS IC6, W'CC, /(Ti /Ci£>
7400
C7-
/C/7
■74-f-a
d « -f
COUNT
^37
4.TK I n
ICZO
14IO
£zy \i^o\i^i
/I o ® J ^-T <
r>»A^ *!./» «>
L&D 3
7 SeCNEUT
Display
FP
7404-
TlLSCcO
POiMER 5UAPLY
CNI>SSIS
^.A-K
/C6
744Z
VHZ47
■I-I2.Y Tli-V
I Ilia 'y-Ci9
^200 1 2200
74 90
A/OT£S7 U7U£-£.SS OTNBRUV'Se SPeC/P/EO
^BS/sTO'^s PNce ^ 5%, CPeeo/v.
YtPLUES /a/ Oa/A^S
i^£s/sTo<e.s A/fi9e.P:£D * Pe.e
metpl. p/uN
C.'PP^C/r'9/UCS /S /A/ /W/C'CO PPeATDS
O/OOBs P-e£ /7UR<D0 9.
A/PN r^p/TS/sroiPs mpsg£3/
SPiTeS MAPKED "•" A/PYB OPE/V
dOUUBCTOlZ. OUTPUTS.
14C0
<9/.S
2n3<.45
L^'2T MO
MODEL 77S
c GO As/re R.
D- 3<2.ies
IDOO® *V. 9-UI2
175-0101-SI