Disassembly - Pioneer VSX-1022-K Service Manual

5

7. DISASSEMBLY

Note:
(1) Even if the unit shown in the photos and illustrations in this manual may differ from your product, the
procedures described here are common.
(2) For performing the diagnosis shown below, the following jigs for service is required:
• 9P extension jig cable (GGD1739)
• 13P extension jig cable (GGD1740)
• 3P extension jig cable (GGD1741)
• Board to board extension jig cable (GGD1756)
• Board to board extension jig cable (GGD1770)
• Board to board extension jig cable (GGD1800)
• 25P extension jig FFC (GGD1801)
1. Discharging
[1] MAIN Assy Capacitor (C55, C58)
[Procedures]
(1) Unplug the power cord.
(2) Disconnect the 10P connector from CP403 of the AMP7/AMP5 Assy between CN3 of the MAIN Assy.
(3) 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.
(4) Check that the voltage between the +B and –B terminals is less than 1 V, using a tester.
∗ Be sure to connect the GND terminal of the tester to the chassis.
∗ If the voltage is still 1 V or higher, repeat Step (3).
[2] FL-30 V Capacitor (MAIN Assy C101)
[Procedures]
(1) Unplug the power cord.
(2) Connect pin 1 (–30V) and pin 2 (GND) of CN704B 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 –30V terminal is less
than 1 V, using a tester.
∗ Be sure to connect the GND terminal of the tester to
the chassis.
∗ If the voltage is still 1 V or higher, repeat Step (2).
5
6
CP403
AMP7/AMP5 Assy
VSX-1022-K
6
7
C58 C55
–B +B
D7
47 - 100 ohms
(2 W or higher)
CN704B
GND
−30V
47 - 100 ohms
(2 W or higher)
7
8
A
B
C
MAIN Assy
D
CPU Assy
E
F
55
8