Teac A-3300 - Bias Trap Adjustment

‘VU METER LAMP
8.5
Qu? =
9-288 R703
fav
RECORD PERFORMANCE
REC LAMP
. s7ose — OK2020 Qaor
RECORD MODE! ERase
“a 6 Ksoz>
v3 Srosd
Hor g NORMAL
“|
Sm
TAPE SPEED)
BIAS TRAP ADJUSTMENT
Wi ——
:
cult ion
sre ~28
TaPet ay
3.5V
Fig. 8-5 Simplified Diagram -Record-
NOTE
The
bias
trap
tank
circuit
keeps
the
bias
signal
from
reaching
the
record
and
monitor
amplifier
and
under
normal
no
signal
conditions,
voltage
should
not
be
present at the OUTPUT jacks.
1. Place BIAS switch in HIGH position.
Place MONITOR switch in TAPE position.
Place ail record mode switches ON.
Place tape mode lever at PAUSE position.
Depress record and |buttons.
2. Connect a VIVM to the junction of C-309/L-302.
“Adjust L-302 for minimum reading.
3.
Connect
a
VIVM
to
the
junction
of
C-318/L-304.
Adjust L-304 for minimum reading.
Fig. 8-6 Bias Leakage