ARMY TM 5-6675-238-14
MARINE CORPS TM 08839A-14/1
Table 3-1. PADS Test Set Controls, Indicators, and Connectors — Continued
Control, indicator, or connector
Function
Tape reader, art no. 877406-2
(figure 3-2.1)
SRCH/HOME switch
SPL/LOOP switch
LED display
R/L switch
FAST/SLOW switch
TIME/HOURS
INPUT/OUTPUT connector
+28 V DC fuse indicator
115 V AC fuse indicator
Buffer Unit (figure 3-3)
Connector 21J1
Connector 2112
J1
Momentary switch for both functions. SEARCH position al-
lows return of tape to exact position of the character at the
1/0. This operation is functional only when tape reader has
stopped. SEARCH mode automatically places tape reader in
loop mode during character search. Tape reader will return
to spool mode when search is complete. The HOME posi-
tion returns the tape to the exact read start position, This
function is operational in either direction and may be used
for rewind. A HOME position is established by lifting read
head cover and closing. The character under the read head
at this time is the HOME character
In SPL position, tape reader is ready for operation in the
spooler mode. The LOOP position provides for tape reader
operation with a loop or unspooled section of tape
A 10-segment indicator LED display provides both fault
information and data monitoring. During normal operation,
indicator 1 thru indicator 8 displays the data present at the
1/0. Indicator 10 indicates that the tape reader is ready for
operation. This indicator will light after a short delay when
the tape reader is turned on. If indicator 10 flashes after
power is applied, a fault is indicated. Most right indicator is
number 1 and most left indicator is number 10. Indicator 9
is not used
Provides manual drive right or manual drive left. Tape reader
will drive in direction selected as long as switch is held
Selects rate for tape reader operation. FAST position allows
reader operation up to 600 characters per second. SLOW
position allows tape reader operation of 125 characters per
second
Indicates total on time for tape reader
Provides power, control, and data signals connection between
tape reader and SPU
Lights when fuse in + 28V line has blown
Lights when fuse in 115 VAC line has blown
Provides control signal connection between buffer unit and
SPU
Provides control signal connection between buffer unit and
computer
Change 1
3-6.1/(3-6.2 blank)
