Sony STR-KS380 receiver Parts

The Sony STR-KS380 is a home audio receiver (AV receiver) that acts as the hub for your entertainment system; it takes audio from sources like a TV, cable box, or game console and powers connected speakers. This model is listed under Audio equipment parts for service and repair.

What it does in a home theater setup

A receiver like the Sony STR-KS380 typically handles these core jobs:

• Switches between multiple input sources (for example, TV, DVD/Blu-ray, or game console)
• Decodes and processes surround sound audio (depending on the source and settings)
• Amplifies audio and sends it to your speaker channels
• Provides volume control, tone adjustments, and listening modes
• Routes audio through speaker terminals and may support a subwoofer output

Common symptoms that lead people to look up this model

If you are on the STR-KS380 parts page, these are the most common reasons:

• No power (dead unit, no display)
• No sound from one or more speakers
• Unit turns on then shuts off (protection mode behavior)
• Distorted audio, crackling, or intermittent sound
• Inputs not working or audio cutting in and out

Quick checks before you plan a repair

These steps help narrow the problem to wiring, speakers, or the receiver itself:

Check	What to do	Why it matters
Speaker wiring	Inspect for loose strands touching other terminals	Shorts can trigger protection shutdown
Source/input	Try a different input and a different source device	Confirms whether the issue is upstream
Power	Try a known-good outlet and power strip	Rules out a supply problem
Reset basics	Power off, unplug for a few minutes, then retry	Clears some temporary faults

Why it matters

Receivers combine power, signal processing, and multiple connections in one chassis; a single loose wire, blown fuse, or damaged internal connection can cause symptoms that look like a major failure. A structured check saves time and prevents repeat shutdowns.

For electrical troubleshooting steps (like checking a fuse safely), use our DIY guide: how to tell if a fuse is blown.

Last updated: February 2026

Yes. Sony receivers like the STR-KS380 can feel hot during normal operation because the amplifier and processing circuits generate heat even at low volume. The top or rear vent areas can become noticeably warm, and the unit can run hotter with louder playback or poor ventilation.

What “normal heat” looks like

A receiver that is working normally often has these traits:

• Warm to hot air coming from the top or rear vents
• The chassis feels hottest near ventilation holes
• Heat increases with higher volume, bass-heavy content, or long listening sessions
• Heat is worse when the receiver is in a tight cabinet or stacked with other gear

When heat is a problem (what to check)

If your STR-KS380 is shutting down, smells like hot plastic, or is too hot to touch for more than a second, treat it as overheating and check:

• Vent openings blocked by dust, papers, or décor
• Receiver placed on carpet, inside a closed cabinet, or too close to a wall
• Other components stacked on top (cable box, game console, etc.)
• Speaker wiring issues (stray strands touching, pinched wire, loose terminals)
• Speaker load concerns (very low-impedance speakers can run an amp hotter)

Quick cooling and placement tips

Use these setup basics to reduce heat stress:

• Leave open space above and behind the receiver for airflow
• Keep vents clear and gently dust them regularly
• Avoid stacking components directly on top
• If in a cabinet, keep the door open during use or add ventilation

Typical causes and what to do

Symptom	Common cause	What we recommend
Runs warm but plays fine	Normal heat from operation	Improve airflow and keep vents clear
Gets very hot at low volume	Blocked vents or tight space	Reposition for better ventilation
Shuts off after a while	Overheat protection or wiring issue	Check speaker wires and reduce load

Why it matters

Excess heat shortens the life of internal components (power supply parts, output transistors, solder joints). Good ventilation helps your Sony receiver stay reliable and prevents nuisance shutdowns.

For safe electrical checks (like verifying a fuse or testing continuity), use our guide: how to use a multimeter to test electrical parts video.

Last updated: February 2026

For the Sony STR-KS380 receiver, STR-KS380 is the manufacturer’s model number, not an acronym you translate word-for-word. In Sony audio equipment, “STR” commonly identifies an A/V receiver product line, and **“KS380” distinguishes the specific series/package and feature set.

What the model number tells you (and why it matters)

Using the exact model number helps us match the right audio equipment parts, wiring, and compatibility details for your receiver.

• STR: Sony receiver line identifier (used across many Sony receivers)
• KS380: the specific model family or home theater package designation
• STR-KS380: the full identifier you should use when searching parts and diagrams

Where to find and confirm the model number on the receiver

On most Sony receivers, the model number is printed on the unit and packaging. Check these common spots:

• Rear panel label near the power cord or speaker terminals
• Bottom label (if present)
• Original carton label
• Setup paperwork or purchase receipt

Quick check table

Item to match	What to look for	Example
Brand	Manufacturer name	Sony
Product type	Component category	Receiver
Model number	Exact characters and dashes	STR-KS380

Common mix-ups we see

Some customers see “STR” used in other industries (real estate, banking, etc.). For this product page, STR-KS380 is strictly the Sony receiver model identifier.

• Don’t drop the dash; search STR-KS380 exactly
• Don’t use only “KS380”; it can pull unrelated results
• If you have a similar Sony model, parts can differ even when the front panel looks the same

Helpful next step

If you are confirming the model number for parts lookup, use our guide: how to find your appliance model number (and what it means for parts).

Last updated: February 2026

Common problems we see with Sony AV receivers like the Sony STR-KS380 include no power, no sound, intermittent audio, overheating and shutdown, remote control problems, and the receiver going into protection mode. Most issues trace back to power supply problems, wiring or speaker shorts, incorrect input settings, or heat buildup.

Most common symptoms (and what they usually mean)

• No power: outlet, power cord, internal fuse, or power supply failure
• No sound or low volume: wrong input selected, muted zone, bad source device, or speaker wiring issue
• Cuts out or shuts off: overheating, blocked vents, or protection mode from a shorted speaker wire
• Protection mode: speaker wire strands touching, low-impedance load, or a failing output stage
• Remote not working: dead batteries, blocked sensor, or remote needs re-pairing (if applicable)
• Audio out of sync: TV or source device delay settings, processing modes, or cable path differences

Quick checks we recommend first

1. Power reset: unplug the receiver for 2 minutes, then plug it back in.
2. Confirm the basics: volume up, not muted, correct input selected, correct output (speakers vs. headphones).
3. Isolate the source: try a different HDMI/optical/analog input and a different source device.
4. Check speaker wiring: look for loose connections and stray copper strands touching the chassis or another terminal.
5. Ventilation: move the receiver so it has several inches of clearance on top and sides; remove anything stacked on it.

Protection mode and overheating: what to do

Protection mode is often triggered by a speaker short or an unsafe load. Use this fast isolation method:

• Disconnect all speaker wires from the receiver.
• Power on; if it stays on, reconnect one speaker at a time to find the problem channel or wire.
• If it shuts down with a specific speaker connected, inspect that wire run and speaker terminals.

Common causes at a glance

Symptom	Most likely cause	Best first action
Shuts off after a few minutes	Overheating	Improve airflow, lower volume, check vents
Shuts off immediately	Speaker short	Disconnect speakers, reconnect one-by-one
No sound on one channel	Wiring or speaker issue	Swap speakers left to right to confirm

Why it matters

Receivers protect themselves to prevent amplifier damage. Fixing a wiring short, improving airflow, or correcting input settings often restores normal audio without replacing major components.

For repair planning and parts lookup by model, use Sears PartsDirect.

Last updated: February 2026

The Sony STR-KS380 is rated at 108 watts per channel (stereo) at 3 ohms. In multi-channel specs, it’s commonly listed as 167 watts per channel (front/center/rear) at 3 ohms and 165 watts for the subwoofer at 3 ohms.

The watt ratings you’ll see for STR-KS380

These numbers are tied to specific test conditions (impedance and channels driven), so they are not interchangeable.

• 108 W x 2 (stereo) at 3 Ω
• 167 W (front/center/rear channels) at 3 Ω
• 165 W (subwoofer) at 3 Ω
• Power can look different if measured at 6 Ω or 8 Ω, or with more channels driven at once

How to compare these watts to other receivers

Most receivers are advertised at 6 Ω or 8 Ω; the STR-KS380’s published figures are at 3 Ω, which makes direct comparisons tricky.

Spec you’re comparing	What to match	Why it matters
Watts per channel	Same ohms and same channels driven	Apples-to-apples loudness expectations
Subwoofer watts	Powered sub vs. passive sub rating	Prevents mismatch and distortion
Speaker impedance	Use speakers within the receiver’s supported range	Avoids protect mode and overheating

If you’re troubleshooting low volume or shutdowns

Power issues are often wiring-related, not a lack of wattage.

• Check for stray speaker wire strands shorting at the terminals
• Verify each speaker plays cleanly at low volume, then increase gradually
• Confirm the subwoofer connection type (powered vs. passive) matches your setup
• Test suspect wiring and connections with a meter using how to use a multimeter to test electrical parts video

Why it matters

Using the correct watt rating (with the stated ohms and channels) helps you match speakers correctly and avoid clipping, distortion, or receiver protection shutdowns.

Last updated: February 2026