Teac A-4070G - Test Point

REEL
TORQUE
ADJUSTMENT
PROCEDURES
—————--—————_
"=
Voltage Specifications
Before
making
reel
torque
adjustments,
measure
the
voltages
as
outlined
below.
Voltages
are
measured
from
point
(A)
on
PC
board
#50482780
and
the
applicable
resistor
tap.
Place
the
unit
in
the
PLAY
mode.
A. R-801, TAKE-UP TORQUE. Voltage from point (A) to center tap of R-801
should read 54 +1V AC.
B. R-802, BACK TENSION. Voltage from point (A) to lower tap of I-802
should read 45 +1V AC. (Tape switch in REGULAR position.)
C. R-803, TAPE TENSION (0.5 mil THIN position). Voltage from point (A)
to R-802 lower tap should read 40 +1V AC with tape tension switch at
THIN position.
CONNECT VIVM
OR EQUIVALENT
METER
THIN
TAKE-UP BACK TENSION TAPE 0.5 MIL
Rsot
REAR
OF
TAPE
DECK
M-0282
#50482780
Rsol
C 803
“s, (A)
+o TEST POINT
~~
Caos
}
W
aby
D-OSI7
Fig. 6-2 Tension Resistor Voltage Measurements
and Operation Diagram