Teac A-4300SX - Trouble-Shooting-2; Amplifier inoperative; Playback audio intermittent or absent

9. TROUBLE-SHOOTING-2
NOTE:
Reference
numbers
given
for
the
Amplifier
section
are
Left
channel
designations.
Refer
to
the
schematic
diagrams
Right,
for
channel
reference
numbers.
Prefix letters indicate:
C: Capacitor D: Diode
Q: Transistor CR: Spark Killer (Cap.)
K: Relay SW: Switch
ELECTRICAL
a
MALFUNCTION
POSSIBLE
SOURCE
OF
TROUBLE
|
@ Amplifier inoperative — we Defective Q]1, Q2 or associated parts
@ Playback audio intermittent or absent
a) If SOURCE Monitor function
ROU ee Play head plug loose or disconnected
Q101, Q102, Q103 or associated parts
b) If SOURCE Monitor function
inoperative
Grounding
strap
loose
or
disconnected
from
the
power
amplifier PC
Board
Faulty
Q201, Q202
or the
associated
parts
VU
Meter
inoperative
in TAPE MONITOR mode
(OUTPUT
Switch
at
SOURCE)»
Defective
monitor
switch
Q203
or
associated
parts
VU Meter inoperative
in SOURCE monitor mode
(OUTPUT
Switch
at
TAPE)
>
Defective
monitor
switch
Q309
or
associated
parts
VU Meter inoperative in both modes ————_—___—» Faulty meter or wiring
Will not record and
RECORD Indicator lamp illuminates
a) No erase action ————_______—————» Faulty Q401, Q401, Q402 or associated parts
b) VU Meter SOURCE monitor function
a NL Dirty Record head
Defective Q301 or associated parts
Will not record and RECORD Indicator lamp
does not Ty ee RS RECORD-MODE switch
Faulty K401
— = | Lmause] (RecoRD
te: 0.1nF/ 4004 |
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RC-140 REMOTE CONTROL SCHEMATIC
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