39
HTP-071
5
6
7
8
5
6
7
8
A
B
C
D
E
F
7. DISASSEMBLY
7.1 VSX-321-K-P
1. Discharging
(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 G
N
D terminal of the tester to the chassis.
∗
If the voltage is still 1 V or higher, repeat Step (2).
[1] MAIN Assy Capacitor (C55, C58)
[Procedures]
(1) Unplug the power cord.
(2) Connect C
N
704 pins 1 or 2 (–30V) and pins 7 or 8 (G
N
D), 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 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
[Procedures]
47 - 100 ohms
(2 W or higher)
47 - 100 ohms
(2 W or higher)
C
N
704
1
27
C58
C55
J35 (B+)
J57 (B−)
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)
MAI
N
Assy
FRO
N
T Assy
Summary of Contents for HTP-071
Page 9: ...9 HTP 071 5 6 7 8 5 6 7 8 A B C D E F ...
Page 12: ...12 HTP 071 1 2 3 4 A B C D E F 1 2 3 4 4 2 OVERALL BLOCK DIAGRAM H FRONT ASSY A INPUT ASSY ...
Page 89: ...89 HTP 071 5 6 7 8 5 6 7 8 A B C D E F C SIDE B CP1 CP3 CP5 CN1 CN3 ...
Page 93: ...93 HTP 071 5 6 7 8 5 6 7 8 A B C D E F D SIDE B CN600 CP104 ...
