Genuine Icom Volume Control Board with Rotary Encoder for IC-F4261DT
This is a genuine Icom volume control unit board assembly designed for the IC-F4261DT digital two-way radio. The green PCB is marked "S501" and "B765B" with board identification "0L6" visible on the reverse side. This complete assembly includes a rotary encoder with metal shaft for volume control, push switches for additional functions, a white ribbon cable connector for main board interface, and a nine-pin gold-plated through-hole pad array for component connections. The board also features an integrated flat flexible cable (FFC) connector. This unit handles user interface functions including volume adjustment and related control inputs.
Key Features
- Genuine Icom replacement volume control unit for IC-F4261DT radio
- Complete assembly with rotary encoder featuring metal shaft and knurled adjustment knob
- Board markings: S501, B765B, 0L6, 8S99L8
- White multi-conductor ribbon cable with blue stripe for main board connection
- Nine gold-plated through-hole solder pads for component mounting
- Integrated push switches for additional control functions
- FFC (flat flexible cable) connector for display or other interface connections
- Factory-assembled and tested unit ready for installation
Compatible Models
- Icom IC-F4261DT Digital UHF Two-Way Radio
What's Included
- One (1) Complete Volume Control Unit Board Assembly with Attached Ribbon Cable
Replacement Part Numbers
- Includes components: 2250000800 and 7210003610
Application & Installation
This volume control unit is a user interface component that requires careful installation by a qualified technician. The board must be properly positioned within the radio's housing with the rotary encoder shaft aligned through the front panel opening and the control knob secured to the shaft. Installation involves disconnecting the ribbon cable from the main board, removing screws or clips securing the old unit, carefully extracting it from the radio chassis, installing the new unit with proper mechanical alignment, reconnecting the ribbon cable ensuring correct orientation and full insertion into the connector, and verifying that all switches and the rotary encoder function properly before reassembly. Common reasons for replacement include worn or scratchy rotary encoder operation, broken encoder shaft, failed push switches, damaged ribbon cable, or complete loss of volume control function. While less complex than RF board replacement, this repair still requires radio disassembly skills, attention to proper cable routing, and verification of functionality after installation. Care must be taken not to damage the delicate ribbon cable during installation, and proper strain relief should be maintained to prevent future cable fatigue failures.
Manufacturer Part Number: 98416862
Board Markings: S501, B765B, 0L6, 8S99L8
Includes Components: 2250000800, 7210003610
