Disassembly - Pioneer VSX-1019AH-K Service Manual

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7. DISASSEMBLY

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Preparations Before Performing Diagnosis of the POWER PACK Assy
Before performing diagnosis of the POWER PACK Assy, it is necessary to discharge C5301 and C5302 on the board.
(See the photo below.)
If you don't, the Power Pack ICs (IC5001, IC5002, and IC5003) on the board may be damaged.
[Procedures]
1. Unplug the power cord.
2. Lift the UL tube at the location near C5301 and C5302 so that the periphery of D5301 becomes accessible.
3. Connect J192 and J1005 (or J1006 or J1007), as well as J195 and J1005 (or J1006 or 1007).
With the above connections, Pins 1 and 4 of D5301 are grounded to the ground points and discharged.
Note: For discharging, use a load of 100 Ω , 3 W or more, to protect the IC protectors. Do NOT discharge instantly by
short-circuiting.
4. Check that the voltage between the electrodes of each C5301 and C5302 is 1 V or less.
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POWER PACK Assy
POWER PACK Assy
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VSX-1019AH-K
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UL tube
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J195
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