Sony WM-150 - Main Board (Side A)

Tape Speed Adjustment
Procedure:
test tape
WS-48A
. . ;
(3kHz,
O0dB)
.
|
frequency
counter
p=
PHONES
1, Playback WS-48A (tape center portion) in FWD mode.
Adjust the RV601 so that the frequency counter reads”
3,000 Hz +15 Hz. | my
2. Playback WS-48A (tape center portion) in REV mode.
Confirm
that
the
reading
of
frequency
counter
is
within
2.5% from the reading in step 1.
Adjustment Parts Location Diagram
MAIN BOARD (SIDE A)
RV101___ wig!
~(L-CH) ‘S'
Playback Level Adjustment
DOLBY
NR
switch.
.........
ee
ay
OFF
VOis
HOO:
6s
2G.
-ahis
he
oR
a
Mo
a
minimum
DEB
switcha..
«oo
us
eae
ace
SX
NORM
TAPE
2.
ocx
«nk
bS
BO
oe
aE
EB
-
NORM
Procedure:
1, Playback mode.
test tape —
P-4-L300 -
(315 Hz, 0 dB)
—_—_ set
2. Adjust RV101(L-CH), RV201(R-CH) so that the VTVM
reading is -32.7 +1.0dB(0.02 V-0.017V)
Adjustment Location: MAIN BOARD (SIDE A)
— VTVM
ae ILL
to TPL — aA IL
+
to TP R =«——-° {
R-CH | z