Pioneer SX-20-K Service Manual page 38

1
[ Method: 2 ]
A
(1) Unplug the power cord.
(2) Remove the Cabinet.
(Refer to the " [2-1] Cabinet". )
(3) Connect J304(-30V) of the MAIN ASSY to
J272(GND), with a resistor of 47 to 100Ω,
2W or more.
∗ Discharge time: 5 to 10 sec. (according to
the resistor.)
(4) Check by a tester if the voltage of -30V
B
terminal is 1 V or less.
∗ Connect the tester's GND terminal to a
Chassis.
∗ If the voltage is higher than 1V, repeat the
step (3).
C
[2] Disassembly
[2-1] Cabinet
(1) Remove the six screws.
( S-20-K: 1500040083B10-IL)
( S-20-S: 1500040084B10-IL)
(2) Remove the five screws.
(B020030103B11-IL)
(3) Remove the Cabinet.
D
[2-2] Front Section
Remove the Cabinet.
(Refer to the " [2-1] Cabinet". )
-----------------------------------------------------------------
(1) Release the 19P FFC from the PCB binder.
E
(2) Disconnect the connector.
Note on assembling:
When you attach each unit, styling and
connection of cable as shown in the photo.
F
38
1
2
CP501
Power Trans
Front
Cabinet
1
1
1
19P FFC
MAIN ASSY
SX-20-K
2
3
47 to 100Ω
2W or more
J272 (GND)
J304 (-30V)
1
1
2
2
2
1
GUIDE R ASSY
2
FPC101
3
4
C510
MAIN ASSY
2
3
1
2
4