Disassembly; Vsx-321-K-P - Pioneer VSX-321-K-P Service Manual

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7. DISASSEMBLY

7.1 VSX-321-K-P

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:
• Board to board extension jig cable (GGD1736)
• Board to board extension jig cable (GGD1772)
• 3P extension jig cable (GGD1773)
1. Discharging
[1] MAIN Assy Capacitor (C55, C58)
[Procedures]
(1) Unplug the power cord.
(2) Connect J35 (B+) and J57 (B–), using resistor leads with 47 - 100 ohms (2 W or higher), for discharging.
∗ Discharging time: 30 - 60 seconds, depending on the level of resistance.
(3) 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 (2).
MAIN Assy
[2] FL-30 V Capacitor
[Procedures]
(1) Unplug the power cord.
(2) Connect CN704 pins 1 or 2 (–30V) and pins 7 or 8 (GND), 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
J35 (B+)
J57 (B−)
C58
CN704
1
27
47 - 100 ohms
(2 W or higher)
HTP-071
6
7
47 - 100 ohms
(2 W or higher)
C55
FRONT Assy
7
8
A
B
C
D
E
F
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