service manual 6026 member of a att·1' i signal union … · 2015-06-09 · union switch...
TRANSCRIPT
I UNION SWITCH & SIGNAL I (.fill A member of Iha ANSALOO Group 5800 CO<pct~tl! Ot1ve Pins.burgh, PA 15237
OCTOBER. 1987 A-10/87-100-2043-ADl
COPYRIGHT 1991. UNION SWITCH & SIGNAL INC. PRINTED IN USA
SERVICE MANUAL 6026
ATT·1'
Audio Track Transceiver N437360
. N437361 N437362 N438589
ANSALDO Trasporti
I UNION SWITCH & SIGNAL I (fil] A member of the ANSALOO Group 5800 CO<potate Drive Pittsburgh, PA 15237
OCTOBER, 1987 A-10/87-100-2043-AD1
COPYRIGHT 1991, UNION SWITCH & SIGNAL INC. PRINTED IN USA
SERVICE MANUAL 6026
ATT-10
Audio Track Transceiver N437360 N437361 N437362 N438589
AN SAL DO Trasporti
ffi UNION SWITCH & SIGNAL
SECTION
I
II
III
IV
v
INTRODUCTION 1.1 GENERAL 1.2 PURPOSE 1. 3 DESCRIPTIO~
CONTENTS
1.4 SYSTEM SPECIFICATIONS
PRINCIPLES OF OPERATION 2.1 GENERAL 2.2 SYSTEM FUNCTIONAL DESCRIPTION 2.3 UNIT DESCRIPTION 2.4 CIRCUIT DESCRIPITON - TRANSMITTER PCB
(N451055-7401) 2.5 CIRCUIT DESCRIPTION - RECEIVER PCB
(N451055-7501)
INSTALLATION AND APPLICATION 3.1 GENERAL 3.2 PHYSICAL DESCRIPTION 3.3 INPUT REQUIREMENTS 3.4 POWER SUPPLY 3.5 TERMINAL DESCRIPTION 3.6 INSTALLATION SPECIFICATIONS 3.7 LIGHTNING PROTECTION 3.8 MOUNTING REQUIREMENTS 3.9 INSTALLATION PROCEDURE
FIELD MAINTENANCE 4.1 GENERAL 4.2 INSPECTION
SHOP MAINTENANCE 5 .1 GENERAL . 5.2 ELECTRICAL INSPECTION 5.3 TRANSMITTER OUTPUT TEST
74XX) 5.4 RECEIVER OPERATION TEST
75XX)
(PCB N451055-
(PCB N451055-
VI TROUBLESHOOTING PROCEDURE 6.1 GENERAL 6.2 PROCEDURE
VII ORDERING REFERENCES
APPENDIX A PARTS LIST A.l TRANSCEIVER PARTS IDENTIFICATION A.2 TRANSMITTER PARTS LIST N451055-7401
TO N451055-7406 A.3 RECEIVER PARTS LIST N451055-7501
TO N451055-7506
i
PAGE
1 1 1 1 2
3 3 3 3
4
5
6 6 6 6 6 7 7 8 9 9
14 14 14
15 15 15
15
16
18 18 18
19/20
A-19 A-19
A-21
A-23
( FIGURE
1 - 1
2 - 1
•' 2 - 2
3 - 1
-3 - 2
3 - 3
3 - 4
3 - 5
3 - 6
3 - 7
( 5 - 1
5 - 2
5 - 3
A - 1
LIST OF ILLUSTRATIONS
Audio Track Transceiver, Model ATT-10
Transmitter Circuit Diagram
Receiver Circuit Diagram
Lightning Arrester Block Diagram
Shunt type Track Circuit Installation and Adjustment
Highway Crossing Island Circuit
Switch Lock Protection
Vehicle Detection
Series Type Track Circuit Installation and Adjustment Procedure
Switch Lock Release
Transmitter Output Waveform
UNION SWITCH & SIGNAL ffi
PAGE
iv
4
5
8
9
11
11
12
12
13
16
Receiver Test Circuit No. 1 17
Receiver Test Circuit No. 2 17
Parts Identification and Wiring Diagram A-2
ii
ffi UNION SWITCH & SIGNAL
Figure 1-1. Audio Track Transceiver Model ATT-10
iii
UNION SWITCH & SIGNAL ffi
SECTION I
INTRODUCTION
1.1 GENERAL
This manual is provided for the installation, operation, and maintenance of the US&S Audio Track Transceiver, ATT-10. Section I briefly describes the system and lists the operating specifications. Section II deals with the principles of operation and gives a detailed description of the transmitter and receiver circuits. Section III covers the installation of four basic kinds of track circuit applications. Field maintenance instructions are given in Section IV. Section v deals with shop maintenance, including the testing of transmitter and receiver PC boards. Trouble shooting procedure is outlined in Section VI. Parts lists for the ATT-10 Transceiver unit are contained in Appendix A and the ordering references and the mailing address are given in Section VII.
1.2 PURPOSE
The ATT-10 can be used in applications such as, highway crossing island circuits, switch lock protection, and general vehicle detection. Both series and shunt type track circuits are possible.
1.3 DESCRIPTION (Refer to Figure 1-1)
The ATT-10 is a short range, 12 to 2a KHz audio frequency overlay track circuit. It is a transceiver: a single unit contains both a transmitter and a receiver. The unit operates at high audio frequencies to provide sharp block definition. The use of insulated joints is not required and track circuits up to 300 feet are realizable even under poor ballast conditions. Ringby is on the order of 5 to 10 feet and will not change appreciably with ballast variation.
6026, p. l
m UNION SWITCH & SIGNAL
1.4 SYSTEM SPECIFICATIONS
6026 I P • 2
Input Requirements.
1. 8.8 - 16.2 volts de. (10/12 volts de nominal)
2. 1 volt peak to peak ripple maximum
3. 250 milliamperes
4. Reverse battery and surge protection built in.
Output Characteristics
1. 2.0 volts rms (nominal) into 15 ohm load.
2. Frequency (KHz) ±1.0%
12.28 15.00 20.00 28.0.0
3. Modulation Frequency 52 ± 5 Hz.
4. Harmonic generation - second harmonic - 45db (less than 0.6%)
Sensitivity
1. 12 millivolts rrns operating level (Modulated Signal) into 5 ohm impedance.
2. Less than 15 feet spillover, typically 5-10 feet
Temperature Range
-4o0 c to +7o0 c (-40°F to 160°F)
Maximum Block Length
300 feet at 3 ohms per 1000 feet of ballast for the 12.28, 15.0, and 20..0. KHz units. 200 feet at 3 ohms per 10.0Q:feet of ballast for the 28KHz unit.
Overall Dimensions
H - 8-3/16, W - 4-11/1~, L - 9-1/4 Weight: 4 lb. 12 oz. (2.15 KGt
UNION SWITCH & SIGNAi: ffi SECTION II
PRINCIPLES OF OPERATION
2.1 .GENERAL
This section provides a functional description of the ATT-10 system and circuit description of the transmitter and receiver individual printed circuit boards.
2.2 SYSTEM FUNCTIONAL DESCRIPTION
The transmitter produces a high audio frequency output which is sinewave modulated to provide noise immunity. The assigned frequency is introduced into the track through a pair of twisted wires which are connected to the rails. The point at which the wires are connected defines one end of the track circuit. The other end of the track circuit is the point at which the connection for the receiver is made.
Upon receiving the proper frequency, the receiver detects, amplifies, and rectifies the signal to provide a de output to operate an external relay. The receiver detects the presence of a train through the loss of the audio frequency
. signal which is shunted by the train wheels.
2.3 UNIT DESCRIPTION
The unit operates at audio frequencies ranging from 12 to 28 kilohertz, providing sharp block definition. The transmitted signal is amplitude modulated at 52 Hz, providing high noise immunity. The receiver responds only to modulated. signals. The unit can be connected for a series or shunt type track circuit. All track connections are filtered so that the unit is compatible with low frequency overlay equipment and o.c. track circuit equipment. The unit has surge protection and reverse battery protection built into it.
6026, p. 3
~ UNION SWITCH & SIGNAL
2.4 CIRCUIT DESCRIPTION - TRANSMITTER PCB (N451055-7401)
The transmitter circuit diagram is shown in Figure 2-1. Transistor Ql and its associated circuitry comprise a 52 Hz oscillator. Constant signal level is maintained by zener diode, Dl. Transistor Q2 and its associated components form a high frequency oscillator which switches transistor Q3 on and off. Transistor Q3 is a chopper modulator. Inductor Ll and capacitor C3 filter the modulated signal to remove the low frequency component and high frequency harmonics. Resistor Rl2 provides level control. Integrated circuit IC-1 with transistors QS and Q6 make up a unity gain amplifier having low output impedance. Transformer T3, capacitors CS, C6, and C7 comprise a high pass filter to couple the output to the track. Diode 06 provides reverse battery protection, and diode 07, along with the diodes built into transistors QS and Q6, provide surge protection.
s ...
"' ])<;,,
,f7 1 .. 400] IW ft.11
41
Tl '7>~ ....
RI~ 11'1
Cl IS
Q4 Q5
f'#Jfl/lM
11.10 R9 10" P.11
10 TRKI
lU6 Cl ZOO·lW
Rt'5 TRK2 ... ~ LI 11,• 2.Z K "1'3
351< IM
1)1. ... ~ ...... Rt?
''"' CZ. 1001<
e,-
SCHEMATIC OIAGRA"'1 - ATT· 10
· Figure 2-1. Transmitter Circuit Diagram
6026, p. 4
UNION SWITCH & SIGNAL m 2.5 CIRCUIT DESCRIPTION - RECEIVER PCB (N451055-7501)
The receiver circuit diagram is shown in Figure 2-2. Capacitors Cl, C2, C3, transformer Tl, and inductor Ll comprise a high Q bandpass filter. Diode Dl is a detector which demodulates the signal. Transistors Ql and Q2 make up an emitter follower to provide a low impedance source for terminals X and Z which are connected to a terminal strap at.the top the ATT-10 unit. Terminals X and Y are connected for a shunt type track circuit while terminals Y and z are connected for a series type track circuit. Integrated circuit IC-1 is a temperature compensated amplifier which increases the signal to a working level. Capacitors C9 and ClO, and diodes 03 and 04 produce a negative DC voltage from the amplified signal to operate an oscillator which acts as a level detector. The output of this oscillator is a 22 KHz signal which is amplified by transistors Q4, QS, Q6, and Q7. This signal is then rectified and filtered by network 07, 08, Cl6, and Cl7 to produce a negative DC voltage to drive the relay. Diode 09 provides reverse battery protection, and capacitor Cl8 provides power surge protection at the battery connection.
TRK 3 3CI r' 2
1:,'..,
II CJ I LI ~~I TRK4 . . ~ ~
R7 rao
c, 04 1112
C7 !Uf
'" 10011
ll.23 15K
TID
RIO ~OOA
C8 + IOOUFI
12
AU 10011.....,. ........ -1
tl4 fatll
SC.HE MATIC DIAGRAM ATr·!O
11122 +
10.n. c,, IOOUI"
Figure 2-2. Receiver Circuit Diagram
8+ IIM003
Cl7 IUf'
rs-
rR+
6026 I P • 5
ffi UNION SWITCH & SIGNAL
SECTION III
INSTALLATION AND APPLICATION
3.1 GENERAL
This section provides installation and application information for the ATT-10 and related equipment vital to the proper functioning of the specific installation.
3.2 PHYSICAL DESCRIPTION
"The ATT-10 is a single unit (transceiver) containing a transmitter and receiver mounted on a common chassis. The solid state transmitter components are all located on a single printed circuit board. The same applies to the receiver. A sheet steel cover encloses and protects the transmitter and receiver components. Internal wiring is brought out through a rubber grommet to AAR terminals mounted on the front of the case. External circuit connections are made to these terminals, which have applicable circuit markings to facilitate making connections. Also located on the front panel of the case is a screwdriver adjustment access hole for setting the relay operating voltage level control.
3.3 INPUT REQUIREMENTS
8.8 - 16.2 volts DC (10/12 V nominal battery)
3.4 POWER SUPPLY
The ATT-10 may be operated by a CPR Rectifier, but a surge ripple filter must be used to aid in reducing voltage ripple. Part No. Reference {N451036-0701)~ 10-12 volts NOM, .5 ampere rating, Service Manual 5862.
6026, p. 6
,.
UNION SWITCH & SIGNAL ffi 3.5 TERMINAL DESCRIPTION
Terminals are located on front of unit and are designated follows: as
TERMINAL NUMBER CONNECTIONS
1 + Battery
2 4 - Battery
3 ~ '
• Transmitter Leads 4 ./
5 4 ' 6 4
Receiver Leads J
7 • + Relay Lead
8 • - Relay Lead
9 Jumper 9 to 10 Shunt Ckt.
10 Jumper 10 to 11 Series Ckt.
11
3.6 INSTALLATION SPECIFICATIONS
1) Use #14 A.W.G. or heavier twisted pairs, (1000 foot maximum length) for track connections in shunt type track circuit applications. Use t9 A.W.G. or heavier twisted pair, (100 foot maximum length), for track connections in series type track circuit applications.
2) Observe 300 feet (200 feet for 28 KHz Units) maximum block length requirements if poor ballast conditions are expected for shunt type track circuit application.
3) No insulated joints are required. 4) Use higher frequencies where less spillover is desired. 5) Supply power from a 10 or 12 volt nominal battery. 6} Use any of the following relays:
PN-150B-N322500-901 - 400 ohm plug-in DN-11B-N274069 - 500 ohm shelf DN-22B-N272937 - 500 ohm shelf
7} Provide adequate lightning protection. (See Section 3.7}
6026, p. 7
UNION SWITCH & SIGNAL
3.7 LIGHTNING PROTECTION
In order to limit the lightning source voltage it is necessary to employ suitable arresters between the unit and any points of exposure. Use a shunt arrester between the track leads and series arresters from each track lead to a common ground bus. See Figure 3-1.
~.__---'I I SHU NT TRACK Cl RCU IT
0C> TWISTED PAIRS
r,HZ 1 @
+DC 3
2 -DC TO { CD T/R TRACK 7 +RELAY
6026, p. 8
®
5 4 6 10 11 8 -RELAY
I• SERIES TRACK CIRCUIT
(D N314265, USG SHUNT ARRESTER
~ N327989, USG SERIES ,WITH TERM. BLOCK
Q) N314266, USG SHUNT WITH TER1v1. BLOCK
Figure 3-1. Lightning Arrester Block Diagram
UNION SWITCH & SIGNAL ffi 3.8 MOUNTING REQUIREMENTS
A convenient mounting bracket, which is an integral part of the case, provides four holes 2-1/4 inches by 8-1/2 inches apart and facilitates wall, shelf or rack mounting.
3.9 INSTALLATION PROCEDURE
Shunt Type Track Circuit. (Figure 3-2) Figures 3-3 through 3-5 show shunt application
* / / ft. Max.------.... / . /
/ / 1 tP.mporary
/ :-shunt for level
................................................ ...,..,. ...... adjustment
- 400 OHM relay
jumper
011
'8' ATT-10
*: 300 feet for the 12.28, 15, and 20 KHz Units, 200 feet for the 28 KHz Unit.
Figure 3-2. Shunt Type Track Circuit Illustration and Adjustment Procedure
1. Verify frequency selection: a) For shunt operation do not repeat the use of a
frequency on a track without separation by insulated joints.
b} Where less spillover is desired use higher frequencies. c} Where longer block length is desired use lower
frequencies.
2. Verify correct installation: a} Connect jumper strap between terminals 9 and 10 for
shunt operation · b) Connect terminals 3 and 4 and 5 and 6 to the rails
using #14 or heavier twisted pairs. Maximum lead length is 1000 feet.
c) Observe 300 foot (200 foot for 28 KHz Units) maximum block length. if poor ballast conditions exist.
d} Connect terminals 7(+) and 8(-) to the relay. Recommended relay is N322500-901, PNlSOB, 400 ohm, 5.3 volt, biased neutral relay.·
e} Connect terminals l{+} and 2(-) to a nominal 10 or 12 volt battery (8.8 vdc minimum,.16.2 vdc maximum). If battery ripple is greater than· 1.0 volt peak to peak use surge ripple filter N451036-0701.
6026, p. 9.
UNION SWITCH & SIGNAL
f) Install lightning arresters at all battery and track connections.
3. Adjustment procedure: a) Connect hardwire shunt across track outside of the
block 5 feet from the receiver connections (those from ATT-10 terminals 5 and 6).
b) Rotate level adjusting potentiometer clockwise through access hole in front cover until relay is energized.
c) Rotate potentiometer counterclockwise until relay just releases.
d) Remove shunt from track.
Series Type Track Circuit Installation and Adjustment Procedure for Switch Lock Release. (Figure 3-6) Figure 3-7 shows a series application.
1. Verify frequency selection: For series allow at least 2500 feet between locations for units operating at the same frequency.
2. Verify correct installation: a) Connect jumper straps between terminals 4 and 6 and
10 and 11 for series operation. b) Connect terminals 3 and 5 to the rails 75 feet from
the switch points using #9 twisted pair leads. Maximum lead length is 100 feet.
c) Connect terminals 7{+) and 8(-) to the relay. Recommended relay is N322500-901, PN150B, 400 ohm, 5.3 volt, biased neutral relay.
d) Connect terminals l(+) and 2(-) to a nominal 10 or 12 volt battery (8.8 VDC minimum, 16.2 VDC maximum). If a battery ripple is greater than 1.0 volts peak to peak use surge ripple filter N451036-0701.
e) Install lightning arresters at all battery and track connections.
3. Adjustment procedure:
6026, p. 10
a) Connect hardwire shunt across track at ATT-10 lead connections.
b} Monitor relay voltage at ATT-10 terminals 7 and 8 using DC voltmeter.
c) Rotate level adjusting potentiometer clockwise through access hole in front cover until maximum relay voltage is obtained as observed on voltmeter.
d) Rotate potentiometer counterclockwise to obtain 1 to 1-1/2 volts less than the maximum relay voltage obtained in step (C).
e) Remove shunt from track.
- I
* FT. MAX. _! ___ !,..ill I I
+ ..c:--01 10/12v -c___a
2
I I I
3
4
JUMPER --~• §SHUNT *· 300 feet for the 12.28, IO SERIES.
15, and 20 KHz units. I I () 200 feet for the 28 KHz unit.
UNION SWITCH & SIGNAL m
5 7~--...
6 8
PNISOB
Figure 3-3. Highway Crossing Island Circuit
* FT.---__, .... MAX.
JUMPER --9
§5HUNT * · 300 feet for the 12 .28, ro 3ERIES
15, and 20 KHz units. f I() 200 feet for the 28 KHz unit.
7
8
PNl50B
Figure 3-4. Switch Lock Protection
6026, p. 11
~ UNION SWITCH & SIGNAL
* FT .. MA x .. -----.)1,WI
3 +..c--01 f 0/12V T -
----v2 4
JUMPER-__,j,....Q SHUNT
IO() 5ERIES *· 300 feet for the 12.28, 1 IQ
15, and 20 KHz units. 200 feet for the 28 KHz unit.
Figure 3-5. Vehicle Detection
~75ft~
PNl50B
#9 twisted pair, 100 ft. max
p. 12, 6026
+ battery
jumpers
o-to--+ PN150B
c.:8.-- - 400 OHM relay
A'IT-10
Figure 3-6 Series Type Track CirGuit Installation
and Adjustment Procedure for lockrelease
I...,.~-- 75 FT. MAX.----, ...
+..,e--01 3 5 10/12v -::-
-c__,o 2 4 0----0 6
g 0 sHUNT
JUMPER IO QSERIES II tj
Figure 3-7. Switch Lock Release
WARNING
UNION SWITCH a SIGNAL m
Electric propulsion equipment employing phase control or chopper control may create an excessive amount of electromagnetic interference in the audio spectrum, thereby causing improper or potentially unsafe operation· of audio frequency equipment such as ATT-10.
Proper application of such equipment under the conditions of interference described above requires special engineering analysis. Contact US&S Sales for additional information.
WARNING
OPERATING A HAND-HELD TRANSCEIVER OR OTHER RADIOFREQUENCY DEVICES WITHIN 5 TO 10 FEET OF A SHUNT MODE ATT-10 UNIT MAY CAUSE THE UNIT TO FALSELY ENERGIZE IT'S TRACK RELAY WHEN THE TRACK CIRCUIT IS ACTUALLY OCCUPIED. THIS MAY RESULT IN UNSAFE OPERATING CONDITIONS. DO NOT OPERATE HAND-HELD TRANSCEIVERS OR OTHER RADIO-FREQUENCY DEVICES IN THE VICINITY OF SHUNT-MODE ATT-10 UNITS, ESPECIALLY WHEN TRAIN TRAFFIC IS PRESENT.
6026, p. 13
m UNION SWITCH a SIGNAL
SECTION IV
FIELD MAINTENANCE
4.1 GENERAL
This section provides instructions for field maintenance of the . US&S Audio Track Transceiver, ATT-10.
4.2 INSPECTION
When the ATT-10 unit is suspected of failure, proceed as follows:
Inspect and make certain that there are no broken conductors, and no loose solder or terminal connections.
Measure the o.c. input voltage for a reading of 8.8 to 16.2 vo.lts. Measure the transmitter output for proper voltage level, and · check the receiver for proper relay voltage level adjustment.
The ATT-10.has no internal fuses and should be returned to the railroad repair facility when it fails to operate properly. (
Substitute a properly operating unit in place of the suspected defective unit. Be sure that the unit being substituted meets the operating frequency and strapping options for that particular application.
6026, p. 14
, .
UNION SWITCH & SIGNAL m SECTION V
SHOP MAINTENANCE
5.1 GENERAL
This specification provides for electrical testing of the Audio Track Transceiver, ATT-10.
5.2 ELECTRICAL INSPECTION
Equipment nece_ssary for electrical inspection and testing.
• Power supply 0-18 VDC, 0-1.5 amps. Harrison Laboratories Model 855B or equivalent.
• Scope, Tektronics 516 or equivalent. • Counter, Hewlett Packard Model 521C or equivalent. • Simpson Model 260 analyzer. • Resistor, 10 ohm, "J720881. • Resistor, 15 ohm, ,17226 31. • Resistor, 100 ohm, J721194~ • Resistor, 390 ohm, "J720763 • Resistor, l.5K ohm, "J721064. • Resistor decade box, 10 ohm to lOOK ohm.
5.3 TRANSMITTER OUTPUT· TEST (PCB N451055-74xx) Refer to Fig. 2-1
(1) Apply 12.5 ~ .1 VDC to the unit to be tested.
(2) While measuring the frequency across 02, adjust pot core T2 so that the frequency is within 1% of the-value shown in Table I of Section VII.
(3) Check that the voltage across Cl is 6.5 + lV p-p at 52 + 5 Hz.
(4) Increase the DC voltage to 15.0 + .lVDC. The voltage across Cl should not increase more than 0.15 V p-p from the reading at 12.5VDC.
(5) Decrease the DC voltage to 10.5 + .1 VDC. The voltage across Cl should not decrease more than 0.3 V p-p from the reading at 12.5 VDC.
(6) Decrease the DC voltage to 8.5 + .1 VDC. The voltage across Cl should not decrease more than 0.6 v p-p from the reading at 12.5 voe.
(7) Increase the DC voltage to 15.0 + .1 voe.
6026, p. 15
UNION SWITCH & SIGNAL
(8) Adjust pot core Ll to give a maximum voltage across C3.
(9) Connect a 15 ohm resistor across the transmitter output terminals.
(10) Increase the transmitter output to maximum by adjusting Rl2 (through the access hole at the top of the unit) fully clockwise. Adjust pot core L2 so that the voltage at the transmitter output (across the 15 ohm resistor) agrees with the value given in Table I. The waveform should appear as shown in Figure 5-1, with no visible distortion.
TABLE I
Output J
I I
,.
Piece No. Voltage
N437360 7.2 ± 1.8 v p-p
N437361 9.7 ± 2.4 v p-p \ I
\,;~ \
\
N437362 10. 0 ± 2.5 v p-p N438589 10.0+ 2.5 v p-p Figure 5-1. Transmitter Output
Waveform
5.4
(1)
(2)
(3)
(4)
-RECEIVER OPERATION TEST (PCB N451055-75xx) Refer to Fig. 2-2.
Connect the unit as shown in Figure 5-2. Connect a jumper in place of R7 on receiver P.C.B. N451055-75xx. Connect a jumper across C3 on receiver P.C.B. Adjust the DC voltage to 12.5 ± .1 voe.
While maintaining. _the transmitter output voltage at 1.4 + .05 V p-p, adjust pot core Tl on the receiver P.C. boara for a minimum peak-to-peak voltage at the receiver input. This voltage should be less than 0.6 V p-p. Remove the jumper from C3.
Increase the transmitter output to 3.0 V p-p and check that there are no spurious oscillations at the transmitter output.
Adjust the transmitter output so that there is 0.6 V p-p at the receive input. Adjust pot core Ll on the receiver P.C. board for a maximum peak-to-peak voltage at terminal "X". The bottom of the waveform will be clipped but the top of the waveform should not be clipped.
(5) Connect the unit as shown in Figure 5-3. Leave the jumper connected in place of R7.
6q26, p. 16
..
UNION SWITCH & SIGNAL ffi
(6) Connect the jumper on the front of the unit in "shunt" position. Set the level adjustment so that there is 55 + 5 mV p-p at the receiver input. Connect a resistor decade box in place of Rll.
{7) Adjust Rll so that 5.3 volts DC is measured at the relay output {across the 390 ohm resistor). This vpltage should be of the polarity shown in Figure 5-3. Rll should be in the range of lOK ohms. Solder the nearest valued 1/2 w 5% carbon resistor in place of Rll.
(8) Connect the jumper on the front of the unit in "series" position. Set the level adjustment so that there is 400 t 40 mV p-p at the receiver input. Connect a resistor decade box in place of R7.
{9) Adjust R7 so that 5.3 volts DC is measured at the relay output (across the 390 ohm resistor). This voltage should be of the polarity shown in Figure 5-3. R7 should be in the range of 100 ohms. Solder the nearest valued 1/2 W 5% carbon resistor in place of R7.
_l 3 15n
+ ~5 .7 12.5 !. .1 -Volts _2 4 .6 .8 - • DC -
+ • • + Battery XMT RCV Relay
- • • -
Figure 5~2. Receiver Test Circuit No. 1
1 3 1oon
5 7 + --
12.5+ .1 39on
Volts DC -2 6 8 -
+ • • +
Battery XMT RCV Relay
• •
Figure 5-3. Receiver Test Circuit No. 2
6026, p. 17
UNION SWITCH & SIGNAL
(10} Connect a l.5K ohm resistor in parallel with the 100 ohm resistor shown in Figure 5-3.
(11} Set the level adjustment so that there is between 5.3 and 6.0 volts DC at the relay output (across the 390 ohm resistor).
(12) Upon removal of the l.5K ohm resistor, the voltage at the relay output (across the 390 ohm resistor) should drop to less than 1.9 volts D.C.
(13} After final adjustment, seal pot cores with RTV UA41701.
END OF TEST.
SECTION VI
TROUBLESHOOTING
6.1 General
This section provides information for determining when an ATT-10 Transceiver unit has become defective.
6.2 PROCEDURE
When possible, substitute a known properly operating unit in place of the suspected defective unit. Be sure that operating frequency is observed when exchanging units.
Before exchanging units check the following items:
All wiring All soldered connections D.C.input voltage(8.8-16.2 Volts} Transmitter output voltage as shown in Table I Relay adjustment procedure as discussed in paragraph 3.9.
When all the items listed above have been checked and no trouble is found, exchange units. Restored operation by the second unit indicates that the first unit is defective and should be returned to the railroad repair facility for servicing.
6026, p. 18
SECTION VII
ORDERING REFERENCES
Table I
Assembled Frequency Transmitter PCB Pc. No. Pc. No.
N437360 12.28 KHz N451055-7402 N437361 15 KHz N451055-7403 N437362 20 KHz N451055-7404 N438589 28 KHz N451055-7406
Address all orders for units and parts to:
Onion Switch & Signal Division American Standard Inc. Swissvale, PA 15218
UNION SWITCH & SIGNAL ffi
Receiver PCB Pc. No.
N451055-7502 N451055-7503 N451055-7504 N451055-7506
6026, P· 19/20
I UNION SWITCH & SIGNAL I [m] A member of the ANSALOO Group 5800 Corporate Drive Pittsburgh, PA 15237 SERVICE MANUAL 6026
PARTS LIST for
ATT-10
AUDIO TRACK TRANSCEIVER N437360
OCTOBER. 1987 A-10/87-100-2043-AD1
COPYRIGHT 1991, UNION SWITCH & SIGNAL INC. PRINTED IN USA
N437361 N437362 N438589
APPENDIX A
AN SAL DO Trasporti
IJNION SWITCH & SIGNAL ffi APPENDIX A PARTS LIST
A.l TRANSCEIVER PARTS IDENTIFICATION
The following table lists ATT-10 parts description and the associated part number. Refer to Figure A-1, Parts Identification and Wiring Diagram.
ITEM GROUP PART
HUMID U QUANTITY IDENTIFICATION DESCRIPTION M UNITSI 01'.i;. T NUMIER SUFFIX
1 1· ON 4'31359 CHASSIS
2 1 IN 18182.S 9LOC"'-, T.Er<M.
3 4 J Scc98 5GR - I o-32~ w F1 l.. sr.1. 4 4 J 41733 W6Hfl- 10 LOC.K.. .$TL
.5 4 J 48172. NtJT- IQ·:3Z HE')( STL..
c. 33 J ·41818 WSi-tQ.
7 22 M '2.9103 NUT B 22. h1 29101 NLJ-T; 'Sl NDu-J G
9 2. J 75413 G R .~ rr, t'Y1 e:. T
10 \ N Pc.:e .. TRArJ5ty1t1"'iE'R
11 I N - ' PC.B, RE.C:.ElVE;:a..
iZ 4 J 525190 SC.R- 8-32 xf ~ fZl) S,.'-
13 4 J 41114 vlSHa.-e 1.JT.T. 1.;.oci..:. ~'Tl..
14 4 ~- 481,~ NlJ"i- 8-;,-z. )4Ex. 51"&..
15 B M !?>7854 SPACE.Q. 1(o I N 2154'00 002. COVER 17 4 J 52~8'. Sc ,z - 8·3, x.Y8£:Z)Rl) .S M 18 .B 3.0DOC A ·45"2' DOOi W -'2 "2. ii:. F BLK. tr1'ZSl·3C
19 B 2.5000 A 4-5'11. I 6002 W·"Z"L TEF R. ~'ZSl·30
zo :s 2.5000 A 4SG, "Z.I ooos W-'2. '2 TEF G M'Z.5l·30 z, :s 1.0000 A 45~Z.t 0007 W-7. '2. Te:F O MZSl-30
2"Z :B 2.0000 A 45~z., 0008 W-2'1. TEF Y M'2.Sl·30
23 :I {3 J 730041 TE.RMl~AL..
24 t. M 10~154 SLOCK 1 "T'c.~MlNAL
25 1 M 472<30 JUMPER
Z<o I 3 M 105713 MtYT~ INSULATED
6026, p. A-1
UNION SWITCH & SIGNAL
............. _ .:.=i~.\;_:,f.$ ...
"·"··---' Wl'l&CO !It .... __ _ ' ",;"....,, ..... ___ .
.!_~-.:.. -& ) "-~.__;;~;;._ ____ ,_t__,7 ____ __. I
<rr0' @
Vlt.lil.S~~ ..... TMIS SllQ$tTIOtrJ "RC. 'l"O 81t ~1IT&'D-..t&6
-4;i5 .. ---·· ---
Figure A-1. Parts Identification and Wiring Diagram
6026, p. A-2
IJNION SWITCH & SIGNAL ffi
A-2 TRANSMITTER PARTS LIST N451055-7401 to 7406.
(Refer to Schematic Diagram, Figure 2-1 for item reference and Figure A-2 for parts location)
ITEH
Cl C4 cs, 6 C7 Dl 02 I 3 f 4 f 5 D6 07 08 I Cl I Cl
Ql, 3, 4 Ql I 2 I 3 f 4 Q5 Q6 Q5, 6 Rl R2, 7 R3, 6 RS R9 RlO, 11 Rl2 Rl3, 14 Rl5 Rl6 Rl7 Tl
T3 Q2
DESCRIPTION
Transmitter PCB Cap. 15 OF, 10%, 20V, Tant. Cap. 1000 PF, 2%, SOOV, Mica Cap. 4UF, 20%, 200V, Mtl. Myl. Cap. 2UF, 5%, 200V, Mtl. Myl. Diode, IN748A, Zener Diode, IN914A Diode, IN4003 Diode, IN5359B, Zener Diode, IN5341B, Zener Ckt. Int. 741 Insulator, Converter
Transistor, 2N3643 Pad, Transistor, Mtg. Transistor, MJlOOO Transistor, MJ900 Sink Heat Res. 47 ohm, 5%, 2W, Carbon Res. 8.2K, 5%, l/2W, Carbon Res. 3.3K, 5%·, l/2W, Carbon Res. 47K, 5%, l/2W, Carbon Res. 33K, 5%, l/2W, Carbon Res. lOK, 5%, l/2W, Carbon Pot. lOOK, 10% Res. lMeg., 5%, l/2W, Carbon Res. 2.2K, 5%, l/2W, Carbon Res. 200 ohm, 5%, 2W, Carbon Res. 47 ohm, 5%, l/2W, Carbon Inductor
Transformer Transistor 2N3644
WABCO Part lt
N451055-7405 J706891 J700612 J706817 J706815 J726150-0071 J726031 J723555 J726150-0055 J726150-0031 J715022 J792668
J731282 J792072 J731427 J731398-0056 J792324 J721450 J720775 J720888 J720846 J720889 J720883 J620833 J720839 J720842 J721161 J721189 N451030-3504
N437365 J731283
6026, p. A-3
UNION SWITCH & SIGNAL
TRANSMITTER PARTS LIST {CONTINUED)
SUFFIX FREQUENCY KHZ CAPACITOR C2, C3 N451055- PART NUMBER MFD
7402 12.28 J70914·5-oo 35 .015 7403 15 J709145-0034 .01 7404 20 J709145-0131 .0056 7405 28 J709145-0125 .0022
SUFFIX FREQUENCY KHZ POT CORE L2 POT CORE Ll N451055- PART NUMBER PART NUMBER
7402 12.28 N451030-0320 N451030-0315. 7403 15 i-1451030-0321 N451030-0315 7404 20 ~'1451030-0322 N451030-0315 7406 28 M451030-0329 N451030-·0328
SUFFIX FREQUENCY KHZ INDUCTOR T2 N451055- --
7402 12.28 N451030-0314 .7403 15 N451030-0314 7404 20 N451030-0314 7406 28 N451030-0327
6026, p. A-4
UNION SWITCH & SIGNAL m A-3. RECEIVER PARTS LIST N451055-7501 to 7506
(Refer to Schematic Diagram, Figure 2-2 for item reference and Figure A-3 for parts location)
ITEH
C4 cs CG C7,16,17 C8,10,18 C9 Cll,12,13,
ClS Dl, 2 06, 9 DS
14
D7, 8 , 3, 4 I Cl I Cl
L2 Ql,2,3,4 QS Q6 Q7 QS,6,7 Rl,2,4,17 R3, 16 RS,8,9,13,
14 R6, 12 R7, 11 RlO RlS,18,19,
20 R2l, R24 R22 R23 Tl
DESCRIPTION
PCB Receiver Cap •• OOlUF, 2%, SOOV, Mica Cap •• lUF, 20%, 200V, Mtl.Myl. Cap. • lUF, 10%, 200V, .Mtl.Ply-Cbn. Cap. lUF, 10%, 35V, Tant. Cap. lOOUF, 10%, 20V, Tant. Cap. 47UF , 10%, 20V, Tant.
Cap •• OlUF, 5%, lOOV, Polystn Cap •• 068UF, 5%, lOOV, Polystn Diode, IN914A Diode, IN4003 Diode, IN748A Diode, IN2 77 Ckt. Int. 741 Insulator, Converter
Inductor, 10,000UH Transistor, 2N5962-18 Transistor, 2N3644 Transistor, 2N2270 Transistor, 2N4037 Transipad, Trans. Res. lM, 5%, l/2W, Carbon Res. 2.2M, 5%, l/2W, Carbon
Res. lOOK, 5%, l/2W, Carbon Res. lK, 5%, l/2W, Carbon Res. to be determined Res. 500 ohm, l/4W, Silicon
Res. lOK, 5%, l/2W, Carbon Res. 470 ohm, 5%, l/2W, Carbon Res. 10 ohm, 5%, l/2W, Carbon Res. l.SK, 5%, l/2W, Carbon Transformer - Pot Core
WABCO Part i
i.'14 51055-7 5 05 J700612 J702280 J709145-0211 J706387 J706416 J706254
J706589 J706569 J72603l J723555 J726150 -0071 J726150-0ll3 J715022 J792668
J703315 J731398-0040 J731283 J731186 J731291 J792072 J720839 J720845
J720838 J720882
J735260
J720883 J721065 J720881 J721064 '1'1451030-3531
6026, p. A-:
ffi UNION SWITCH & SIGNAL
RECEIVER PARTS LIST (CONTINUED)
SUFFIX FREQUENCY KHZ CAPACITOR Cl N451055- PART NUMBER UF ...
7502 12.28 J709145-0134 . 01 7503 15 J709145-0132 .0068 7504 20. J709-l45-0l28 .0039 7506 28 J1og14s-01s1 • 002
. -
SUFFIX FREQUENCY KHZ CAPACITOR C2 N451055- PART NUMBER PF
7502 12.28 J709145-0023 so 7503 15 J706938 39 7504 20 J706950 22 7506 28 J70689Q 15
SUFFIX FREQUENCY KHZ CAPACITOR C3 N451055- PART NUMBER UF
7502 12.28 J709145-0l26 .0027 7503 15 J709145-0124 .0018 7504 20 J709145-0068 .001 7506 28 J7 0.9.14 5 ..... 01151 • 0005
SUFFIX FREQUENCY KHZ POT CORE Ll N451055- PART NUMBER
7502 12.28 N45l030-0317 7503 15 N451030-0317 7504 20 N451030-0317 7506 28 N45l030-0330
6026, P· A-6
'·
,.
I c:a
FIGURE A-2
Transmitter PCB Parts Location
'JNION SWITCH & SIGNAL m
1~ I --,
_ __J,~
6026, p. A-7
O'I 0 N O'I
'U . :x,, I
co
~ (1) 0 (1) ..... <! (1) Ii
l"(j (1 td
l"(j ~ Ii rt (I)
t-' 0 0 ~ rt ..... 0 ::s
hj H G) Cl
G1 :x,, I
w
ox r- Cl ..
I B- I =i LI c :J
0 ' L Tl n"( \ ~ :J ml:/~ \ ; n
QY
O I \J ~ __/ Cl
n _)C4 +
zo R23 + RIO
"'n nn II LJ LJ CB
LJ +
I ~o•,v~ 0 : \ "8 .. ~ :J " -, ...... ,)
TRK 4 "'-..__ J RI L _J !Cl
0 : 1°• C:::2
:l [ cs ~ ~ 0
, c, LJ,:;;: n112
R
0
,
,,: ~ C :J 14
15 02 LI [ J 115
LJ U i I [Jnnn 02 ___ ,, __ c::J n
2 : 11.. u u u :;: n C c ;,JJ, C J u"
LJ
11 [ eta~+
0 I + " " " "' 0' C "' i r'('LJn04 Cl4 n n n I ) .._) 113 114
- 05 R2D\.J Rlln n n LJ LJ O Ol Cl& + 06 c :J LJ R+ II :::J [ =:;i ...--... :;:o, 119 LJ '"lJc11
C17 ( l L =:) LJ · DB L =:)
I
©
(±)
[ J:i+ _) [ J () O C D Ol Cl3 03
R- 121 C15
L UN451055-75 _J
.. IJ
EE c z 0 z ~ -i 0 :r 11" UI
15 z )> r