Riparo un amplificatore subwoofer in protezione che emette uno strano suono (con schema elettrico)

I'm repairing a subwoofer amplifier with protection that's making a strange sound (with wiring diagram). For free consultations: [email protected] Visit my online store: https://www.amazon.it/hz/wishlist/ls/... wd40: https://amzn.to/3VpXqXp thermal paste: https://amzn.to/3v5eQ0Z 10 ohm 1 watt resistors: https://amzn.to/4cjpgdW 250V polyester capacitors: https://amzn.to/4ae4yuc Bass guitar: https://amzn.to/48Y4w8z Low frequency generator: https://amzn.to/3TkmXia More from the channel: BNC connectors : https://amzn.to/3rHew6M Universal Power Supply https://amzn.to/3MVoNTv Heat Shrink Tubing: https://amzn.to/3WWUtMK Step-up Charger Module: https://amzn.to/3WNmTJ2 3S BMS Module: https://amzn.to/3oNkEsM Micro USB Solder Connector: https://amzn.to/3nQbj2Y USB Monitor: https://amzn.to/3Bpuh3C CR6842S: https://amzn.to/42xDoL6 20N60 MOSFET: https://amzn.to/3pjOCnS SMD Tweezers: https://amzn.to/3nclcaF 20N60 N-Channel MOSFET 20A MOSFET https://amzn.to/44doF9u Micro Spring Test Leads: https://amzn.to/3LAiUvu Instant Soldering Iron: https://amzn.to/422SA2r White Double Spring Connectors: https://amzn.to/3LC4T06 Stackable Hook-Type Multimeter Leads: https://amzn.to/3Ld9zIt 1000V 2A Bridge Rectifier: https://amzn.to/3HhDnTm Ribimex Rainwater Recovery: https://amzn.to/3nf3inN 12V 5050 LED Strip: https://amzn.to/3La078O 1W 3V Amplifier: https://amzn.to/3Ve4wMu LED Flashing lights: https://amzn.to/40RLgpb Male-female DuPont cables: https://amzn.to/3VbOmU3 Colorful SMD LEDs: https://amzn.to/3ndKOUG Resistor kit: https://amzn.to/3V1uzXf Double-sided perforated board for electronic circuits: https://amzn.to/3n283B2 Single-sided perforated board: https://amzn.to/3NlCD3p Micro USB step-up converter: https://amzn.to/3JupkLR TP4056 without protection chip: https://amzn.to/3GZhqHG TP4056 with 2A BMS protection chip: https://amzn.to/3GY2Zn9 1 ohm resistors 3W: https://amzn.to/3HnutnJ 1S 4A BMS: https://amzn.to/3iPO1HX 12V 21W Car Bulbs: https://amzn.to/3GLCfWY TEC06 Battery Capacity Tester (up to 15V): https://amzn.to/3H8EDbM 555 Astable Module: https://amzn.to/3Ld8Yqd 5V Buzzers: https://amzn.to/3vDm8W0 Reed Relay with Magnet: https://amzn.to/3jKAEZJ Electronics Enclosures: https://amzn.to/3GbhWls Bluetooth Receiver: https://amzn.to/3GdziPF Relay Control Module (6 pieces): https://amzn.to/40Gzz4Q 12V to 5V Converter Module (5 pieces): https://amzn.to/3HZMgSI Current-Switch Terminals: https://amzn.to/3GfcXS3 Car Radio ISO Connector: https://amzn.to/3WHDblg 19V 3A Laptop Power Supply: https://amzn.to/3Pnfn3K XL 4015 DC-DC to DC-CV Converter Module: https://amzn.to/3hszQaP Digital Voltmeter: https://amzn.to/3hofsYt Mini Digital Voltmeter: https://amzn.to/3VbD4z3 Integrated Analog Shunt Ammeter: https://amzn.to/3UVOjtL Multi-Turn Trimmer Assorted: https://amzn.to/41Dbn4B Potentiometer Kit: https://amzn.to/3iZGtSH Pre-wired Red LEDs: https://amzn.to/3iZu9lo Step-up Charger Module: https://amzn.to/3FczaQc Spring Connectors: https://amzn.to/422fEhO Rechargeable LED Flashlight with Horn: https://amzn.to/3sIZzhp SMD Heating Plate: https://amzn.to/3N6BYCJ Solar Panel and Controller Kit: https://amzn.to/3ViwQNN Lead-Acid Solar Controller: https://amzn.to/3LC5bUV Lithium Solar Controller: https://amzn.to/3DbybyB Current Clamp Meter unit https://amzn.to/3s6Mheg Fervi Multimeter: https://amzn.to/3s6pQ99 Small Stepdown Module: https://amzn.to/3SI4B9i 10" Monitor: https://amzn.to/3rB2rw8 36V Hoverboard Battery: https://amzn.to/3EgKFWq 10S 36V BMS: https://amzn.to/3BWY3fP BIFRC Spot Welder: https://amzn.to/4289IDS Nickel-Plated Strips for 18650 Batteries: https://amzn.to/3QbvqRv 1S TP 4056 BMS: https://amzn.to/3OVaDQZ 2S NON-BMS BALANCED: https://amzn.to/448z4U7 2S BALANCED BMS: https://amzn.to/3zLPc0E Programmable Type-C Lithium Battery Charger: https://amzn.to/3SfkYu1 Protection Stickers: https://amzn.to/3PRZrpO Variable Power Supply 3-36V 2.5A https://amzn.to/3O6I17G Variable Power Supply 3-24V 1A https://amzn.to/3Qbw9D5 Digital Voltmeter https://amzn.to/3mv7U5l Analog Ammeter 5A https://amzn.to/3xmp61A Trimmer Kit https://amzn.to/3xyjjri Wire Iron https://amzn.to/3O2ZDRz SINGLE-SIDED 1000-HOLE LIGHT https://amzn.to/3rT1H6f Rechargeable Rear Light https://amzn.to/3OFO3NB Toggle Switch: https://amzn.to/3hP4VSI Dremel: https://amzn.to/41NhkvM Presence Sensor: https://amzn.to/3Cq4l7i TP4056 Type-C Charger: https://amzn.to/3nk3TEy AMTEC 559 Flux: https://www.ebay.it/itm/144276352811?...