6V AC/DC Rechargeable Fan Control Circuit Board
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৳ 420.00৳ 550.00 (-24%)
Universal Circuit System HD-2391-2-AII 6V Rechargeable Fan PCB
The HD-2391-2-AII (KN-2391) is an all-in-one replacement controller board designed for 6V AC/DC emergency rechargeable fans (compatible with Sunca, Defender, and Kennedy models). This single-sided phenolic module integrates power rectification, battery management, and load distribution onto a compact footprint.
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- Input Support: Dual 2-pin terminal connection slots for low-voltage AC transformer output and direct DC battery lines.
- Integrated Rectifier: Onboard 4-diode bridge rectifier layout (
D1-D4) paired with dual electrolytic smoothing capacitors ensures clean DC conversions. - Control Interface: Features 3 heavy-duty mechanical slide switches (
SW1,SW4,SW5) to seamlessly toggle fan speeds (High/Low/Off) and emergency lighting arrays. - Power Safety: Built-in blocking diodes (
D5,D6) prevent reverse current discharge, while a dedicated green status LED gives real-time charging feedback.
Perfect for fixing dead or non-charging 6V portable fans and custom low-voltage emergency backup configurations.
If you are replacing this board, tell me:
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- What brand or model of fan are you installing it into?
- Do you need help mapping the transformer or battery wires to the correct board pins?
- Are you checking for replacement components like compatible switches or capacitors?
Universal Circuit System HD-2391-2-AII 6V AC/DC Rechargeable Fan Control Board
This replacement circuit module is engineered for 6V emergency rechargeable fans (compatible with models such as Sunca, Defender, Kennedy, and Midea). It features integrated power management logic, a multi-stage battery charging regulator, and speed/light selector switch paths on a heavy-duty single-sided phenolic substrate.
6V AC/DC Rechargeable Fan Control Circuit Board
⚙️ Core Technical Specifications
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- Module Code: HD-2391-2-AII / KN-2391
- Input Interface: Dual 2-Pin headers for AC mains step-down transformer input and DC source routing
- Nominal Operating Voltage: 6V DC
- Battery Support: Designed for 6V 4.5Ah / 7Ah Sealed Lead-Acid (SLA) rechargeable batteries
- Switching Configurations: 3 onboard multi-position mechanical slide switches (
SW1,SW4,SW5) - Filtering Infrastructure: High-capacity radial electrolytic capacitors (
C1,C5) paired with ceramic bypass capacitors
6V AC/DC Rechargeable Fan Control Circuit Board
🛡️ Functional Sub-Systems & Circuit Layout
1. AC-to-DC Full-Bridge Rectifier Stage
The bottom quadrant houses a heavy-duty discrete rectifier network consisting of four robust black power diodes (
D1, D2, D3, D4). This layout processes the incoming low-voltage step-down AC current into raw DC power. It is immediately filtered by high-capacity smoothing capacitors to eliminate ripple voltage prior to battery distribution.2. Dual-Mode Operation Control
Equipped with independent control tracks to segregate operational loads:
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- Fan Motor Controller: Features direct multi-speed trace configurations (
High / Low / Off) routed via high-contact mechanical slide switches capable of handling inductive DC motor currents. - Emergency Lighting Array Unit: Dedicated traces (
LED/Tube) allow the module to toggle auxiliary night lamps or emergency LED arrays while simultaneously operating the motor.
- Fan Motor Controller: Features direct multi-speed trace configurations (
3. Battery Management & Safety Loop
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- Overcharge Protection: Employs an onboard Zener-stabilized biasing network with ballast resistors (
R3,R7,R15) to limit current and prevent thermal runaway in lead-acid cells. - Reverse Current Blocking: Dedicated blocking diodes (
D5,D6,D11) prevent the battery from discharging backward through the transformer coil during power cuts. - Visual Telemetry: Includes a high-brightness green status LED (
LED4) alongside auxiliary status indicators to confirm live AC power availability and active charging states.
- Overcharge Protection: Employs an onboard Zener-stabilized biasing network with ballast resistors (
6V AC/DC Rechargeable Fan Control Circuit Board
🛠️ Common Applications & Repair Scenarios
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- Direct Drop-In Repair: Restores functionality to dead, non-charging, or speed-locked 6V portable emergency fans.
- DIY Power Projects: Provides an all-in-one charging and load control platform for custom 6V DC backup power banks and solar-assisted low-voltage fans.
If you are currently troubleshooting or replacing this board, tell me:
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- What is the exact issue you are experiencing (e.g., fan won’t spin, battery not charging, completely dead)?
- Do you need assistance mapping the wire colors to their respective solder pads?
- Are you looking for information on a specific burned component value?
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