ldler Wheel ( 33)
When the idler wheel (33) is in the Rewind or
Stop position, the distance from the idler wheel to the
larger dlameter of the motor pulley is 5/ 32 ". To
obtain this dlstance, adjust the two screws on selector
lever (21). The tenslon on idler spring (34), measured
by a spring scale connected to the center shaft of the
idler wheel (33), is I lb. + 0.7 oz. at 3 3/4 ips and
1 lb. ? oz. at 7 l/ 2 ips.
ldler Wheel l42l t
The distance between idler wheel (42) and motor
pulley fs 3/16" and between idler wheel (42) take-up
reel hub is 5/64" when the idler wheel (a2) is in its
disengaged position. Toobtain these distances, adjust
the two screws on the fast forward arm (45). The
tension on idler spring (37), measured by a sprlng
scale connected to the shaft of the idler wheel, is
L2.7 oz. + 0.7 oz.
Record-Playback Head
l. Thread an alignment tape on the recorder.
2. Adiust the mounting while playing back at any
frequency above ?000 cps until the maximuln
output is obtained.
Record Bias
Set Selector Srvitch to Record position. Connect
VTVM across Record play head. Adjust Cl3 for a
meter reading between -44 and -55 volts.
Record Level
krject 1000 cycle at . 98 -1.55 miltivolts to the
Mie. input jack. Set Selector Switch to Record. Ad-
justR3 until record level indicator shadows just close.
A DJ U STMENTS
CLEAN ING
LUBRI CATION
TROU BLE CHART
Record head (9), erase head (t2), pressure rol-
ler (6), tape guides (8) and (13) and capstan are sub-
iect to tape residue as it passes these parts. Clean
these parts with a soft cloth and alcohol.
Clean all idler wheels or any rotating part that
contacts the idler wheels with alcohol.
Lubricate the following parts as follows with a
good light weight oil.
I. Flywheel (46) - 5 drops every 300 hours through
hole at the bottom of capstan.
2. Idler Wheels (29), (33), and (42) - 2 drops to
shaft and I drop to bearlng.
3. Pressure Roller (6) - 2 drops to shaft andl drop
to bearing"
4. Rewind Pulley(30) - 2 drops to shaftand I drop
to bearing.
5. Reel Hubs (2'll - 2 drops to shaft and 2 drops to
bearing.
6. Friction Roller (59) - I drop to bearing.
7. Selector Cam - I droP to bearing.
Sym ptom Cause Remedy
Capstan does not ro-
tate. Defective motor (35).
Capstan idler wheel (33), motor pulley,
or flywheel (46) oify.
Idler wheel tension spring (34) defec-
tive.
Idler wheel (33) and fl.ytiheel (aG) in-
sufficiently lubrica'rci cttusing them to
bind"
Capstan screw hr',
Motor pulley loosv"
Replace motor (35).
fi.|*an with alcohol.
Fi,eplace.
ilIean the spindle bearing and
Lubricate.
Tighten capstan scre\p.
Tighten set screw.
l.
2.
3.
t.
2.
3.
4.
5.
6. 5.
fl
Tape speed too fast. l. Pressure roller tens'nn spring defet:'
tive. 13 If broken, replace. If insuffi-
cient tenslon, shorten.
Weak output; 1.
2. Misaligned record-play head (19).
Loose pressure pad retalning serrrw.
Pressure pad worn and doesnrt contact
the head.
Record-play head (9) defecttve.
Magnetized record-play head (9).
l. See "Adjustfirenis. "
2. Align the Frc-sure pad so it is
parallel with the headand tighten
the retainlng screw.
3. Replace pressure pdd"
4. Replace record-play head (9).
5. Demagnetiz-:, the head.
3.
4.
5.
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