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1. Playback Mode
Repl
Speak
Speaker
to External Speaker
eplace
speaker
N
und
wh
ted
Transistor TR 1, TR 2,
t vEXt ' i See ie
&¢__ or TR 501 or TR 502. —————
Replace transistor
Spee eae
ole
defective
Improper adjustment
'
of VR $01 or VR 50277
Re adjust
Sound from left and right
speakers unbalanced even
when volume controls are
set to Maximum
Improper adjustment of Main Amplifier
Level Control Potentiometer
VR 601.
= ——————
Re-adjust
(20
K 2 B)
Diode D401
or transistor (TR401)
2SD223
ine-
+
1
—
No sound from Line-Out Jack [ No B (+) Voltage Supply
defective
Replace
Transi
TR104
— B (+) Voltage Supply present
Mute Relay is operating — ee
CERIO
)_ Replace
Check working order of Transistor TR101,
TR102
and IC101
Broken wire within Playback Head Coil or
broken Lead Wire
Will play back, but volume
B (+) Voltage low —___—_—____
Diode D401 or Transistor (TR401) defective — Replace
insufficient
|
B (+) Voltage normal —————————
Ox ide has accumulated on the Head —---——— Clean Head
Humming
noise
When Playback Head grounded
Hum
backing coil adjustment faulty ————-—
Re-adjust
noise decreases
L,
en circuit Playback Head Coil
Replies:
Pp
y
Playback
Head
Grounding Playback Head does
Power Supply Circuit Transistor (TR401)
R
=——
,
—
Replac:
not alter hum
defective
Oxide has accumulated
on
Playback Head
io
Check to see if B (+) Voltage is
In case B (+) Voltage is low, check D401
normal
and TR401
In case B (+) Voltage is normal,
check voltage of preamplifier parts
When
tape is running,
hissing noise increases
Tape itself noisy
Replace Tape
Replac
cuit'?
:
Open Circuit
Playback Head Coil
Pisy bem
Head
Irregular Scratching or
Transistor TR101 or TR102
Reédiace transistor
Cracking Noise
| defective
Pp
Resistor R104, R105 or R107
Replace Resistor
defective
é
.
Oxide collected on surface of
——
Clean
H
Tape itself squeaks
-————————
Replace Tape
29
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