Disassembly - Pioneer VSX-03TXH Service Manual
Audio/video multi-channel receiver
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Also See for VSX-03TXH:
- Specification sheet (2 pages) ,
- Operating instructions manual (104 pages)
Table of Contents
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7. DISASSEMBLY
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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 (GGD1576)
• 19P board to board extension jig cable (GGD1577X2)
• 11P FFC (GGD1578)
1. Before the Power Amp Assy is removed
Before the Power Amp Assy is removed, discharge C5721 and C5722 on the POWER AMP Assy, as indicated below.
If you don't, the protectors (P5001 and P5002) on the POWER AMP Assy may be open, and DC voltage may be generated at the power
amplifier output, which will result in "AMP ERR."
The discharge operation indicated below is performed when the MAIN Assy and the AUDIO IN Assy are removed temporarily to remove
the screws of the Regulators attached to the Chassis for a diagnosis of the POWER AMP Assy B side.
[Procedure]
1
Unplug the AC Power Cord.
2
Discharge C5721 and C5722 on the POWER AMP Assy by discharging Pin 1 and Pin 4 of D4701on the DIODE Assy to the earth
point of POWER AMP 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 C5721 and C5722 is 1V or less.
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C5722
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VSX-03TXH
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9 4
2 8
C5721
0 5
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2 9
9 4
2 8
D4701/DIODE Assy
Earth point
Enlarged view of the GND.
m
Enlarged view of the D4701 terminal
discharge point.
Diode lead
Caution shall be exercised when touching the
lead with a short-circuit jig so as not to touch
the lead and the chassis simultaneously.
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B
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