MARANTZ CINEMA 50 Blown
| CONF | DIAGNOSIS | ACTION |
|---|---|---|
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86%
CONF
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Main Power Supply PWB Assembly
The power supply board contains the bridge rectifier and primary filtration capacitors; a short in these components is the most common reason the main AC input fuse fails. Replacing the entire board ensures that damaged traces or secondary failing components are addressed simultaneously.
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8%
CONF
|
Internal Ceramic Fuse (Slow-Blow)
This is the sacrificial safety component that has physically failed to prevent a fire. While it must be replaced, it is a symptom of an underlying overcurrent condition that must be diagnosed to prevent the new fuse from blowing immediately.
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|
6%
CONF
|
Power Output Transistor
If an amplifier channel's output transistor suffers a thermal breakdown or collector-to-emitter short, it will pull excessive current from the main rails. This high current draw triggers the protective fuse to open, isolating the unit from the mains power.
SKU: 2SA1943 / 2SC5200
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DIY Repair Guide
Watch exactly how to replace the Main Power Supply PWB Assembly.
// NOTICE:
This report is generated by an Agentic AI Engineer utilizing probabilistic modeling.
PartSniper is an automated parts recommender service. AI-generated results may not be correct. This data is not a substitute for professional engineering advice or manual inspection. Always verify part compatibility and disconnect power before any repair. PartSniper is not liable for inaccuracies, injury, or damage.