Technics SL-6 - Preparations for Adjustment; Adjusting Method

Servo gain and
offset voltage
Preparations for adjustment
Adjusting
portion Adjusting method
. Open the upper cabinet and hold the
cabinet switch with the tape.
. Close the upper cabinet.
. Connect the DC voltmeter to CN301
. Turn the power switch on and push the
start switch to shift the tonearm inward.
. Open the upper cabinet. a
. Completely shift the tonearm to the
right. Then, adjust VR501 so than the
voltage is 3.6V. (Servo gain)
veo! . Set the tonearm to the center and make
(Servo gain)
P.C.B.
sure that the output voltage is 1.8V.
If the voltage is not 1.8V, loosen the
(Offset
voltage)
(Fig. 32)
terminal 3 and ground terminal.
. Remove the Label of the tonearm cover.
printed circuit board screw and move the
board to the right or left with a screw-
driver so that the output voltage
becomes 1.8V.
After the adjustment, tighten the printed
circuit board screw.
(Offset adjustment)
. Turn the power switch on,
. Set the speed selector switch to 45 rpm.
. Turn VR201 to adjust the speed to the
rated speed (45 rpm).
. Set the speed selector switch to 33 rpm.
. Turn VR202 to adjust the speed to the
rated speed (33-1/3 rpm}.
Note: Be sure to adjust 45 rpm. first.
VR201
(45 rpm)
VR202
(33 rpm)
1. Open the upper cabinet and put on the
Rotation
speed
record.
m@ REPLACEMENT PARTS LIST...Electric Parts
Notes:
1.
5.
Bracketed
indications
in
Ref.
No.
columns
specify
the
area.
Parts
without
these
indications
can
be
used
for
all
areas.”
Areas
Part numbers are indicated on most mechanical parts.
Please use this part number for parts orders.
2. tmportant safety notice:
Components identified by A mark have special characteristics
important for safety, When replacing any of these components
use only manufacturer’s specified parts.
3. This ‘'S '’ mark is service standard parts and may differ from
production parts.
4. Unless otherwise specified.
All resistors are in OHMS (2) K = 10000 , M= 1000k0
All capacitors are in MICROFARADS (uF) P= puF
* [E] is available in Switzerland and Scandinavia.
* [EK] is available in United Kingdom.
* [XL] is available in Australia.
* [EG] is available in F.R. Germany.
* [EB] is available in Belgium.
* [EF] is available in France.
* [XA] is available in Southeast Asia, Oceania, Africa,
Middle Near East and Central South America.
* [EH] is available in Holland.
* [Ei] is available in Italy.
* [EC] is available in Czechoslovakia.
* [XM] is available in Central South America.
Description
Ref.
No.
Part
No.
Description
Ref.
No.
Part
No,
Description
INTEGRATED
CIRCUITS
Q305
2SB641
Switching
D320
SVDPR5704SF
Light
Emitting
Q306
2SD636
Converter
Diode
AN7812
Regulator
Q308,
309
2SB641
Waveform
0321
SVDPG5724SYF
|
Light
Emitting
AN6636
Drive
Shaping
Diode
AN6552
FG
Amplifier
&
Q310
288641
Speed
Select
D501
S
|MA162A
Constant
Q311
2SD636
Start/Stop
D502
S
|MA162A
Voltage
(Hall
Select
D503
SVDPR3432S
Light
Emitting
Element)
Diode
MN1425F
PE
Micro.
Computer
Q312
2SD636
Switching
D801, 802
S
|MA162A
Slice
&
Integration
AN6552
Arm
Motor
Q401,
402
2SD592
Arm
Motor
D803
MA1047TA
4.7V,
Zener
Control
Control
D804,
805
S
|MA162A
Biass
AN6562
OC
amplifier
&
Q403,
404
2SD638
Arm
Motor
D806
S
|RVDRD7R5FB
|
7.5V,
Zener
Band
Pass
Filter
Control
AN6912
Comparator
@801
2SB641
Biass
SWITCHES
$1
A
|
SFOSCOSNO8
Power
$301
~
314
EVQQSHO3B
Program,
Reset,
Cueing,
Start
&
TRANSISTORS
Stop
2SC1383NC
Regulator
DI
A
|SVDSiRBA20F
|
Rectifier
ts
STDSHSVVO699
an
eee
9301
2SD636
Speed
Select
D2
S
|MA1056
5.6V
Zener
eI
alae
ie
pie
.
$701
SFDSCOS5NO01
Cabinet
Q302
2SD636
Muting
Relay
D301
~
311
SVDPR5704SF
Light
Emitting
$801
SEDSHSWwo0699
|
Gain
Selector
Drive
Diode
i
@303
2SD636
Cueing
Drive
D312
~
317
MA162A
Switching
cia
ite
HANES
ener
eee
eae
aed
@304
28D892
Cueing
Drive
D319
s
IRVDRD7A5FB_|7.5V,
Zener
Baal