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Page Title:
Resolvers and Peak Detection Circuit Checks. |
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 TM 9-4931-378-13&P
(4) Set circuit breakers CB1 (47) and CB2
(13)
Check DVM for indication
less than
(46) to ON.
0.010 Vac. (See table 5-4, 70.)
Set α resolver B1 (1) to 90.0.
(14)
(5) Read 6.87 Vac to 7.27 Vac on DVM. Re.
(15)
C h e c k D V M f o r i n d i c a t i o n less than
cord reading. (See table 5-4, 68 and 69).
0.010 Vac.
(6) Observe 380 Hz to 420 Hz (waveform 3,
Set TS MON switch S11 (52) to SIN (α-
(16)
5-4, 69.)
resolver B2 (2) to 0.0O.
(17)
Set
(7)
Disconnect
from panel/
Check DVM for indication
(18)
Iess than
chassis.
0.010 Vac (See table 5-4, 70.)
m. Resolvers and Peak Detection Circuit Checks.
(19)
resolver B2 (2) to 180.0.
Set
(20)
Check DVM for indication less than
NOTE
0.010 Vac. (See table 5-4, 70.)
(21)
Set TS MON switch S11 (52) to COS
The reading recorded in paragraph 1, step
(22)
Set
resolver B2 (2) to 270.0.
(5) is required to perform this test.
(23)
Check DVM for indication less than
0.010 Vac (See table 5-4, 70.)
(24)
resolver B2 (2) to 90.0.
Set
(1) Connect DVM positive lead to TP9 (50).
(25)
Check DVM for indication less than
(2) Connect DVM negative lead to TP10
0.010 Vac. (See table 5-4, 70.)
(51).
(3) Set circuit breakers CB1 (47) and CB2
(46) to OFF.
NOTE
(4) Connect test cable (figure 1-3) between
connectors J4 (36, figure 2-1) and J5
For the following tests, the DVM must be
(34).
set to the 10 Vdc range.
(5) Set circuit breakers CB1 (47) and CB2
(26) Move DVM positive lead from TP9 (50)
(46) to ON.
to TP15 (40).
(27) Move DVM negative lead from TP10 (51)
to TP16 (39).
Set AADS TEST switch S16 (30) to REF
(28)
OSC.
Record DVM reading (9 to 11 Vdc nomi-
(29)
nal). (See table 5-4, 71 and 72. )
Excessive rate of resolver drive rotation
Set AADS TEST switch S16 (30) to SIN
(30)
will result in damage to the drive assem-
α.
bly.
(31 ) Set α resolver B1 (1) to 90.0.
C a r e f u l l y adjust α resolver B1 (1) for
(32)
maximum positive dc voltage. Record vol-
NOTE
tage. (See table 5-4, 73 and 76.)
(33) Dual-speed dial shall indicate
between
The DVM must be set to the one-volt ac
89.9 and 90.1. (See table 5-4,
75.)
scale to provide sufficient sensitivity.
(34) Voltage recorded in step (32)
shall be
within 0.136 Vdc of the voltage
recorded
in step (29) multiplied by 0.440. (See ta-
(6) Set TS MON switch S11 (52) to SIN α .
ble 5-4, 74.)
(35)
Set AADS TEST switch S16 (30) to COS
α.
(8) Check DVM for indication less than
Set α resolver B1 (1) to 0.0O.
0.010 Vat. (See table 5-4, 70.)
(36)
(9) Set α resolver BI (1) to 180.0.
C a r e f u l l y adjust α resolver B1 (1) for
(37)
(10) Check DVM for indication less
than
maximum positive dc voltage. Record
0.010 Vat. (See table 5-4, 70.)
voltage.
(11) Set TS MON switch S11 (52) to COS α -
(38)
Dual-speed dial shall indicate between
(12) Set α resolver B1 (1) to 270.0.
5-22
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