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TR0UBLE
CHART
(Con't)
Symptom
Cause
Remedy
Speed
variation, or
wow.
l.
O11
orforeign matter
on cap-
stan shaJt
(17),
tape
pressure
roller
(22),
speedchange
id-
ler
wheels
(95)
and(97),
main
drive
pulley
(79), and
main
drive belt
(13?).
1. Clean contact
surfaces with
cleaning
fluid.
3.
4.
2.
3.
4.
Setscrewin motor
drive pul-
ley
(126)
and
capstan
drive
flywheel
(87)
loose.
Pressure
roller
arm formed
spring
(5?) loose
or broken
.
Insufficient
tape
pressure
roller
pressure
on
capstar
shaft (U).
2.
Tighten setscrew.
Replace pressure
roller
arm
formed spring
(5?).
See
"Pressure
Roller Adjust-
under "Mechanical Adjustments.
"
Fatls
to record or
play.
l.
Tape
pressure
pad
(54)
fails
to
holdtape
against heads
due
to
mlssing
return
spring
(143).
2.
Right-hand
tape
guide
post
(18)
improperly
positioned
.
Open
eircuit in
head
or
con-
necting
cable.
Defect
in
amplifier circuit,
5. Record actuating
rod
(64)
missing.
1. Replace
return spring
(143).
See
"Record-Playback
Head
Ad-
justment" under
"Electrical Ad-
justments.
"
Ifhead
and connecting
cable are
open, replace.
Check
amplifier circuit
for faulty
2.
3.
4.
3.
4.
components.
5. ReplaeeRecord actuating
rod
(64).
Fails to
erase-
l.
Open
coil in erase
head
(l5B).
2.
Defective
oscillator
tube.
3. Defectin oscillator circuit.
1. Replace erase head
(158).
Replace
oscillator
tube.
Check
oscillator circuit for faulty
components.
2.
3.
MECHANICAL PARTS
LIST
I
2
2A
3
3A
4
5
6
87
09
r05410
105584
Retainer,
Tape
Reel Retalner
(Rubber)
ShaJt,
Right-Iland
Reel
Eub
And
Shaft
Ass'y.
Shaft, Left-Eand
ReeI Eub And Shaft
Ass'y.
Knob,
Tone
Control
Knob (Brown)
Knob,
lfiark/ Stereo-Slngle Control
Knob (Brown)
Knob,
Loudness
Control
Knob
(Suntan
Gold
Screw,
#6-32
x 3/4t!
Fil.
Hd.
Escutcheon,
Front Control
Panel
Escutcheon
I
8
9
10
11
t2
l3
L4
l5A
l5B
r0l?0?
101483
r015r4
r05612
105589
103277
Screw,
#6-32
x 3/16"
Binding
Head
Microphone Housing
Interlock,
Fagt Forward
or
Rewind
Interlock Bar
Spring, Interlock Bar
Tension Spring
Mounting
Screws
(4)
Motorboard, Motorboard
Subassembly
Screw,
#8-32
x
L/
2" Long
Escutcheon,
Record-Play-Erase llead
Escutcheon
Head, Record-Play
Head
With
Male
Connector
Head, Erase
Head
With
Male
Connector
Page
lZ
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