31
VSX-523-K
5
6
7
8
5
6
7
8
A
B
C
D
E
F
7. DISASSEMBLY
1. Discharging
(1) Unplug the power cord.
(2) Disconnect the 10P connector from CP403 of the AMP5 Assy between C
N
3 of the MAI
N
Assy.
(3) Disconnect the 7P connector from CP7 of the REG Assy between
W
7 of the MAI
N
Assy.
(4) Connect B+ and B– terminal of the D7, using resistor leads with 47 - 100 ohms (2
W
or higher), for discharging.
∗
Discharging time: 30 - 60 seconds, depending on the level of resistance.
(5) Check that the voltage between the B+ and B– terminals is less than 1
V
, using a tester.
∗
Be sure to connect the G
N
D terminal of the tester to the chassis.
∗
If the voltage is still 1
V
or higher, repeat Step (4).
[1] MAIN Assy Capacitor (C55, C5
8
)
[Procedures]
(1) Unplug the power cord.
(2) Connect pins 3, 4 (–30
V
) and pins 5, 6 (G
N
D) of the
C
N
704B on the CPU Assy,
using resistor leads with 47-100 ohms (2
W
or higher),
for
discharging.
∗
Discharging time: 5 - 10 seconds, depending on the
level of resistance.
(3) Check that the voltage between the –30
V
terminal is less
than
1
V
, using a tester.
∗
Be sure to connect the G
N
D terminal of the tester to
the chassis.
∗
If the voltage is still 1
V
or higher, repeat Step (2).
[2] FL-30 V Capacitor (MAIN Assy C101)
[Procedures]
47 - 100 ohms
(2
W
or higher)
47 - 100 ohms
(2
W
or higher)
C55
B+
G
N
D
−30
V
B–
D7
CP403
C
N
704B
CP7
C5
8
Note:
Even if the unit shown in the photos and illustrations in this manual may differ from your product, the procedures
described here are common.
Some connections of the housing wires or connectors may be tight.
W
hen disconnecting those wires or
connectors, be careful not to damage them.
MAI
N
Assy
AMP5 Assy
REG Assy
CPU Assy
