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Technics SL-J2 Service Manual page 10

Quartz direct drive automatic turntable system

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m CONTENTS
Page
Page
SAFETY
PRECAUTION
.....-.-.
20022 seer ne ee eee 2
REPLACEMENT
PARTS LIST.........-...0.2206-
14,15
LOCATION OF CONTROLS
...........2
0c ener cece 3
EXPLODED VIEW...
2-2. eee
ee
ee
ee ee eee 15 ~17
DISASSEMBLY
INSTRUCTIONS
.........-2-++06.
4~7
CIRCUIT BOARDS AND WIRING
MEASUREMENTS
AND ADJUSTMENT..........-.-.
8,9
CONNECTION
DIAGRAM
............-..005
18 ~ 20
TROUBLE SHOOTING
......--.
2.00
ee eee eeee 10 ~12
. SCHEMATIC
DIAGRAM
..........0022
20 eee 21~24
HOW TO SET THE TONEARM
DRIVE ROPE...........
13
BLOCK DIAGRAM.
....
2... 2.22
eee
ee ee
re
ee 25 ~27
RESISTORS AND CAPACITORS
..........--8085
13, 14
PACKUNG
iss. .6; Sse chelen ei
Piel a oteed ls, Spb ale, wae tied BR
28
m SAFETY PRECAUTION
Before servicing, unplug the power cord to prevent an electric shock.
When replacing parts, use only manufacturer's recommended components for safety.
Check the condition of the power cord.
Replace if wear or damage is evident.
After servicing, be sure to restore the lead dress, insulation barriers, insulation papers, shields, etc.
Before returning the serviced equipment
to the customer, be sure to make the following insulation
resistance test to
prevent the customer from being exposed to a shock hazard.
OV
GN
>
e
INSULATION
RESISTANCE
TEST
1. Unplug the power cord and short the two prongs of the plug with a jumper wire.
2. Turnon the power switch.
Note:
Some exposed parts may be isolated from the chassis by design.
These will read infinity.
Antenna
terminal
Exposed
Exposed
metal
metal
part
part
Ohmmeter
Ohmmeter
(Fig. A)
(Fig. B)
Resistance
= 3M2—5.2M
Resistance
= Approx
oo
4. |f the measurement
is outside the specified limits, there is a possibility of a shock hazard.
The equipment should be
repaired and rechecked before it is returned to the customer.

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