DP-3080Mk
ΙΙ
/3090
4
ADJUSTMENT
No.
1
2
3
FOCUS
OFFSET
TRACKING
BALANCE
TRACKING
GAIN
TEST DISC
TYPE 4
Test disc
type4 Apply
signal of
1.2kHz
50mVrms to
TP301 pin5-6.
TEST DISC
TYPE 4
CONNECT AN
OSCILLOSCOPE
to TP301
CH1 : RF(
1
)
CONNECT AN
OSCILLOSCOPE
to TP301
CH1 : TE1(
5
)
CH2 : VC(
4
)
Connect a LPF to
TP301 pin 5-6 to
which you connect
an oscilloscope or
AC voltmeters.
STOP
PLAY
SHORT–CIRCUIT
TP2 WITH TP5
AFTER THE
ADJUSTMENT
REMOVE
SHORT–WIRE
PLAY
VR301
FE OFFSET
VR302
TE BALANCE
VR303
TE GAIN
DC=0V
SYMMETRY
BETWEEN
UPPER AND
LOWER
Two VTVMs
should read the
some value.
(e)
ITEM
INPUT
SETTING
OUTPUT
SETTING
PLAYER
SETTING
ALIGNMENT
POINT
ALIGN FOR
FIG.
1. WITH PRESSING PLAY/PAUSE (
6
6
) TURN THE POWER ON TO ENTER THE TEST MODE.
2. SET THE TEST DISC TO DISC NO SONY YEDS–18. (TYPE4)
(e) Tracking gain
Note:
Type 4 disc : SONY YEDS-18 Test Disc or equivalent.
LPF: Around 47 k
Ω
+ 390 pF or so.
GND
TP301
1.2 kHz
50 mVrms
+
_
L.P.F.
+
+
L.P.F.
VTVM
VTVM
1
2
3
4
5
6
7
DP-3080Mk2(k)
COVER(
98.4.24
2:42
PM
y [ W
8
