Record- Playback Head A lignment
l. Thread a standard alignment tape on the trans-
port as described under "Threading the Tape".
2. Connect an AC voltmeter to a standard phono
plug and insert the plug into the Output jack.
3. Remove the head cover.
4. Insert ascrewdriverthrough the holein thehead
into the alignment screw.
5. Playthe tape back at full volume, and rotate the
alignment screw in either direction until the
10,000 cycle note gives the highest meter read-
ing.
Brake Shoes
When brake shoes (34) and (80) become worn,
loosen the mounting screws and rotate the shoes a few
degrees until a new braking surface j,s exposed.
ADJUSTMENTS
LUBRICATION
CLEAN I NG
TROUBLE CHART
Lubricate the following parts every three months
in heavy service, every six months in moderate ger-
vice, or once a year in light service.
l. Supply and take-up reel spindle shafts, with two
drops of light oil.
2. Rewind idler bearing and take-up idler bearing
with one dropof light machine oil on each bear-
ing.
3. Apply a liberal amount of light machine grease
to the pressure roller bearing shaft. Replace
the pressure roller and wipe a\pay any excess
grease.
4. Remove the thumbscrew (120) and? L/ 2 ips bush:
ing (l2l) from the capstan. place a few diops of
oil in the oil hole in the capstan retaining ring.
Allow the motor to run for a few minutes. Wipe
away any excess oil and replace the bushing.
5. Place a small amount of grease on the index
counter rilorm gear.
6. Applya liberalamountof machinegrease to each
roller on all levers and cams.
7. Disassemble the motor and saturate the upper
and lower oil pads. Clean away all excess oil.
Most defects, other than wear or breakage, can
be traced to dirty surfaces with which the tape makes
contaet. The Record-Playbaek head, capstan and
pressure roller may accumul,ate a coating of residue
which is worn off the tape as it passes these parts.
Usinga soft cottoncloth and aleohol, clean theseparts
periodically.
=On
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sd
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Sym ptom Cause Remedy
Motor does not run. AC cord disconnected.
Fuse blown.
Defective motor.
Connect AC cord-
Replace fuse.
Replace motor.
I.
2,
3.
t.
2.
3.
Noisy playback or poor high
frequency response. Heads misaligned.
Head magnetized-
See "Record-PIayback Head
Alignment".
Demagnetize head.
i.
2.
l.
2.
Wow or flutter
speed. at 7j ips 1. Speed change bushing (f2l) slip-
ping on shaft. l. Tighten screw (120).
Insufficient drive
3 3/4 ips speed. at 7! or l.
2.
3.
4.
Defective main drive idler wheel
(31).
Oil on capstan.
Defective capstan drive belt
(u8).
Drive motor (I24) defective.
l. Replace main drive idler wheel
(3t).
See 'Cleaning".
Replace belt (ll8).
Replace drive motor (124).
2.
3.
4.
Tape spills when going from
Rewind or Forward to Stop. Reel diameters unequal.
Brake shoes (34) and (80) worn
or out of adjustment.
Tape reels must have the same
diameter.
Replace or adjust brake shoes
(3a) and (80).
l.
2.
l.
2.
Index Counter doesnot func-
tion. l. Counter belt (12?) worn or bro-
ken. I" Replace counter belt (127).
No takeup or fast forpard. l. Forward idler tension spring
(32) disconnected or broken. l. Connect or replace Forward idler
tension spring (32).
TI
o
0
m
F
(.'t
No tape movement in Play
or Record mode. l. Pressure roller tension spring
(51) broken. I. Replace pressure roller tension
spring (51).
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