Disassembly - Pioneer VSX-2016AV-S Service Manual

1

7.1.9 DISASSEMBLY

A
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)
1. Before the Power Amp Block is removed
B
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]
1
Unplug the AC power cord.
2
Discharge C3257 and C3258 on the TRANS 2-1 Assy.
Note: For discharging, use a load of 100Ω, 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.
C
25
VLb 26
VHb
27
D
E
F
238
1
2
IC3252
AEK7021
7A
-65V
S
TRANS 2-1 ASSY
VSX-2016AV-S
2
3
Q3252 Q3252
UMD2N UMD2N
D3265
13(B)
D3266
Q3253 Q3253
13(B)
UMD2N UMD2N
R3254 R3256
4.7k 3.3k
(1/2W)
(1W)
LMF
LMF
1 2
To VH TR ASSY
C3257
C3258
S
TRANS 2-1 ASSY
3
4
+56V
-56V
3 4 5 6
3251
51048-0600
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