VSX-2016AV-S
238
1
2
3
4
1
2
3
4
C
D
F
A
B
E
7.1.9 DISASSEMBLY
1. Before the Power Amp Block is removed
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.
Note 2:
For performing the diagnosis shown below, the following jigs for service is required:
• 11P board to board extension jig cable (GGD1482)
• 13P board to board extension jig cable (GGD1483)
• 15P board to board extension jig cable (GGD1484)
• 21P board to board extension jig cable (GGD1485)
2
Discharge C3257 and C3258 on the TRANS 2-1 Assy.
Note:
For discharging, use a load of 100
Ω
, 3W or more, to protect the IC protectors. Do NOT discharge instantly by short-circuiting.
3
Check that the voltage between the electrodes of each C3257 and C3258 is 1V or less.
4
Reassembling the Power Amp Block.
1
Unplug the AC power cord.
Before the Power Amp Block is removed, discharge C3257 and C3258 on the TRANS 2-1 Assy, as indicated below.
If you don't, the IC protectors (IC3351 and IC3352) on the VH TR Assy may be open, and DC voltage may be generated at the power
amplifier output, which will result in "AMP ERR."
[Procedure]
IC3252
C3254
C3260
C3259
R3251
3251
R3256
R3254
C3257
C3258
Q3253
Q3253
D3266
C3256
D3265
Q3252
Q3252
D3264
D3262
D3260
D3258
D3256
D3254
UDZS12(B)
UDZS6R8(B)
UDZS8R2(B)
7A
AEK7021
470/100
STBY
STBY
MUF
(1/4W)
47
51048-0600
4.7k
LMF
(1W)
3.3k
(1/2W)
LMF
220/100
220/100
UMD2N
UMD2N
13(B)
100/63
13(B)
UMD2N
UMD2N
2
1
3
6
5
4
-65V
VHb
27
VLb
26
25
-VH
-C
-B
+C
+VH
+B
-56V
+56V
TRANS 2-1 ASSY
To VH TR ASSY
S
TRANS 2-1 ASSY
S
C3258
C3257
Содержание Elite VSX-81TXV
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