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|  TM 11-6660-204-25
Item
Item
Action or Condition
No.
Normal Indications
Corrective Measures
stallation. If pen rides
11
Continued
against the chart but does
not print, clean and/or fill
the pen.
REC ZERO control
12
Check for noise in the signal
Rotate REC ZERO control
Pen records below and above
data converter. Trouble-
between limits. Adjust to
zero. Final setting produces
shoot the measuring cir-
a print at zero on the chart.
cause the pen to print at
cuit.
zero.
If pen comes to rest above or
Press until check is finished,
Pen lifts and moves to 95 and
REC TEST switch.
13
below 95, check setting of
marks the chart. When
then release.
REC TEST ADJ., drive ca-
switch is released, pen re-
ble tension, balancing mo-
turns to previous setting.
tor, serve system, and mea-
suring circuit.
If pen comes to rest above of
Pen lifts from the chart and
60 C.P.S. check.
Rotate SIG SEL switch to 60
14
below 30, check setting of
C.P.S. (Adjust SPEAKER
moves upscale, then sets
REF ADJ. control. If pen
VOL. as desired.)
down and marks the chart
does not move, and no audio
at 30 or to a position corres-
tone is produced, check the
ponding to one-half of the
power supply. If an audio
line frequency.
tone is produced, check
A 60 hertz tone is heard from
stages V305, V306 and V307.
the speaker.
Replace speaker volume con-
SPEAKER VOL.
Loudness of tone from the
15
V a r y the setting of the
trol.
loudspeaker changes. Con-
SPEAKER VOL. control.
trol operate smoothly with-
out producing noise in the
tone.
Check power supply outputs.
RFD ADJUST control.
16
Rotate the REF ADJ. hand-
Pen moves upscale and re-
Troubleshoot measuring
w h e e l fully clockwise.
c o r d s 35 ordinated or
circuit. Replace R202.
When check is completed
higher.
readjust as for item 14.
If pen records at 30, replace
120 C.P.S. check.
Pen lifts from the chart and
Rotate SOG SEL switch to
17
F403 or F404. If pen does
120 C.P.S.
moves upscale and marks
not move, check the circuit
the chart at 60 or to a posi-
of S202.
tion corresponding to the
line frequency.
A 120 hertz tone is heard from
the speaker.
Check cable connections. As-
Pen records at values equal to
SIG check. (If a signal
Rotate SIG SEL switch to
18
sure signal is provided from
one-half the input fre-
source is not available
SIG.
source (Rawin Set or Fre-
from the rawin set or fre-
quency. The audio tone is
quency Standard TS-65).
heard from the speaker. Pen
quency standard, omit
Replace signal cable.
lifts each time the signal
this step and leave the
frequency is changed.
switch to either the 60 or
120 C.P.S. setting.)
Replace switch S203.
INTER S. C.-OUTPUT
Pen goes to zero.
Set INTER S. C.-OUTPUT
19
S.C. switch.
S.C. switch to OUTPUT
S.C. Hold until pen stops.
Replace switch S203.
Pen goes to zero.
Set switch to INTER S.C.
Hold until pen stops.
If chart will not advance for
C H A R T SPEED INS/
Chart advances
inch per
20
Set at
any speed setting, check in-
minute.
MIN. (Frequency-Time
put to, or replace the chart
Recorders RD-88A/
drive motor.
TMQ-5 and RD-88B/
TMQ-5 have two-speed
(1/2 and 1) chart drive
mechanisms. RD-88C/
TMQ-5 has three speed
capabilities (1/2, 1, and
2).
If the chart advances for only
Chart advances 1-inch per
Set at 1.
one speed for Recorder
minute.
RD-88B, troubleshoot the
circuit of S502 and C501.
3-18
Change 3
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