TM 32-5835-005-14 & P
u. Rewind unit to 0 on counter. Set
n. Note and record readings for 200Hz,
audio generator to voltmeter and the
400Hz and 2000Hz. All readings should
0dB range.
be 3dB with reference to 1000Hz at 0dB.
v. Place unit into the REPRODUCE mode.
o. Connect audio generator to RCVR 1
input. Connect headphone jack with 600
w. Adjust channel 1 gain control for
ohm load to audio generator input and
0dB. At 1000Hz, at 8000Hz adjust R15 on
oscilloscope. Load cassette with blank
record/reproduce board (A1A3) for 0dB.
tape into unit.
p. Set audio generator switch to
x. Note and record readings for 200Hz,
oscillator output and the 0dB range.
400Hz, 2000Hz and 4000Hz. All readings
Adjust oscillator output to 0dB.
should be 3dB with reference to 1000Hz
0dB.
q. Set channel selector switch to
channel 1. AGC/MAN switch to MAN. Speed
y. Connect audio generator output to
selector switch to 1-7/8 IPS.
RCVR 2 input.
r. Set audio generator switch to
z. Repeat steps o. through v. Insure
voltmeter and the +10dB range. Adjust
channel selector switch is in channel 2
channel 1 gain control to +7dB.
position.
s. Set audio generator switch to
aa. Adjust channel 2 gain control for
oscillator output and the 0dB range.
0dB. At 1000Hz, at 8000Hz adjust R33 on
Decrease audio generator oscillator to
record/reproduce board (A1A3) for 0dB.
10dB.
bb. Note and record readings for 200Hz,
Reset unit counter to 0; place
t.
400Hz, 2000Hz, and 4000Hz. All readings
into the RECORD mode. Record:
unit
should be 3dB with reference to 1000Hz
10 counts 400HZ
10
counts 1000HZ
0dB.
counts 8000Hz
10 counts 2000HZ
10
counts 200HZ
10 counts 4000HZ
10
Section
X.
TESTING
AFTER
REPLACEMENT OF SERVO CAPSTAN CONTROL
(A1A5)
c. Place speed selector in 1-7/8 IPS
7-31 Test equipment required.
position.
a. Pre-recorded tape cassette 3KHz
d. Switch to AGC position.
.5% at 1 7/8 IPS.
e. Obtain a 3KHz count by adjusting
b. Counter, Electronic Digital Read-
out, AN/USM-207A.
R-14.
f. To adjust 15/16 IPS speed, use
c. VTVM Type ME318/U.
the 1 7/8 IPS tape with speed selector
set to 15/16 IPS and adjust R13 for
Testing Procedure.
7-32.
1.5KHZ, 2%.
a. Connect frequency counter to head-
g. Place unit in STOP and remove
phone jack and select channels 1 and 2.
electronic counter.
b. Place 1 7/8 IPS tape in unit and
activate PLAY.
7-11/(7-12 blank)
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