Schematic | Xhdata D-808
While the DSP chip handles the heavy lifting, the quality of the signal entering the chip is critical. The schematic reveals a carefully designed analog front-end.
As of 2025/2026, it is unlikely. The D-808 is being slowly phased out in favor of the newer XHDATA R-108 and the upcoming "D-808W" (Wi-Fi version). However, legacy support remains strong on Chinese forums like Hellocq.net and radiomanual.info.
Pro tip: If you search for "XHDATA D-808 schematic site:radiomanual.info", you will sometimes find a scanned copy of a handwritten correction that XHDATA sent to an early reseller. Bookmark that site and check monthly.
Common issues:
If you want, I can:
XHDATA D-808 Go to product viewer dialog for this item. does not have a single "official" service manual containing a full factory schematic available to the public. However, the community has documented its internal design extensively based on its core Silicon Labs Si4735-D60 DSP chip. Core Architecture and Components
The D-808 is built on a high-performance Digital Signal Processing (DSP) architecture. Understanding its design involves looking at these key sections:
RF Section (DSP Chip): The heart of the radio is the Si4735-D60 chip, located on the main RF board. This chip handles all demodulation for AM (MW/LW), FM, SW, and SSB.
Audio Power Amplifier: The radio uses a CS4863 (equivalent to the LM4863) IC for audio output. Some technical analyses suggest that because the Si4735's output is low (~80mVrms), the CS4863 may produce audible background noise if not properly pre-amplified.
Protection Circuitry: Lithium battery safety is managed by the DW01A (IC2) and a 82015A MOSFET (IC1) to prevent overcharging or discharging.
PCB Design: The unit consists of two main circuit boards connected via a plug-in ribbon cable. The Si4735 chip is specifically located on the RF board near the center-right edge. Schematic Variations (Version Comparison)
If you are troubleshooting, it is critical to know that XHDATA revised the internal layout across different versions:
Original Version (Pre-2023): Characterised by a Micro-USB port and often a blue or orange screen.
New Version (2023-Present): Features a USB-C port and rubber feet on the bottom. The RF circuit boards in this variant are completely different from the original. Some DXers report a change in the audio amplifier that may affect performance on very weak AM signals. Common Technical Modifications xhdata d-808 schematic
Because the factory schematic is restricted, the "deep guide" for most enthusiasts consists of popular hardware mods: XHDATA D-808 Radio
A very specific topic!
The XHData D-808 is a popular digital radio and a highly sought-after device among radio enthusiasts. Here's some interesting content related to its schematic:
Overview of the XHData D-808
The XHData D-808 is a compact, portable digital radio that supports multiple frequency bands, including shortwave, FM, and AM. It's known for its excellent reception, compact design, and user-friendly interface. The device is based on the SDR (Software Defined Radio) technology, which allows for flexible and upgradeable firmware.
The Schematic: A Glimpse into the Design
The XHData D-808 schematic provides a fascinating look into the device's internal design. The schematic diagram shows the various components, including:
Design Considerations and Challenges
Designing a device like the XHData D-808 poses several challenges:
Reverse Engineering and Community Efforts
The XHData D-808 has sparked interest among radio enthusiasts and hackers, leading to various reverse engineering and community-driven projects:
The XHData D-808 schematic provides a fascinating glimpse into the design of a modern digital radio. The device's SDR architecture, combined with its compact design and user-friendly interface, make it a popular choice among radio enthusiasts. The community-driven projects and reverse engineering efforts demonstrate the device's potential for customization and innovation.
Providing a full schematic for the XHDATA D-808 is challenging because the manufacturer does not publicly release service manuals. However, here is the proper content and known sources you can use to find or request it: While the DSP chip handles the heavy lifting,
No legally free, full official schematic is publicly available as of 2026. Do not pay for “official service manuals” from third-party sites – they are usually fake or just chip datasheets.
Recommendation: Join the Groups.io XHDATA-D808 list and ask politely. A member there has shared a partial PDF (power supply and audio stages) in the past.
Finding a complete service manual for the XHDATA D-808 can be difficult as the manufacturer does not publicly distribute a master schematic. However, a technical XHDATA D-808 schematic is hosted on enthusiast platforms like Radioscanner.Ru.
This guide breaks down the core architecture and hardware versions to help with repairs or modifications. Core Architecture & Key Components
The D-808 is a Digital Signal Processing (DSP) receiver built on two main circuit boards (RF and Control) connected by a ribbon cable.
DSP Chip: Silicon Labs Si4735 — This is the "brain" of the radio, handling AM (LW/MW/SW) and FM decoding. It is oddly located on the RF board rather than the control board.
Audio Amplifier: LM4863S — A standard bridged-mode amplifier. In some versions, the gain is set very high to compensate for the lack of a dedicated pre-amplifier.
Power System: Driven by a single 18650 lithium battery. The charging circuit is managed internally via a micro-USB (older) or USB-C (newer) port. Identifying Your Hardware Version
XHDATA significantly redesigned the internal circuitry around 2023. Knowing your version is critical for accurate troubleshooting. Feature Original Model "New" Model (post-2023) Power Port Power Button Long-press to turn on Short-press to turn on Bottom Pads Flat plastic Rubber tabs Board Layout 5 IF coils, 6 trimmers Reduced components; 3 total adjustment points Common Service Tasks
Antenna Repair: The whip antenna was originally anchored only to the PCB, making it prone to snapping the solder joint. Newer versions add a stabilizing screw through the back case.
External Antenna Mod: The 3.5mm external jack is known to "push out" heavy adapters. Using a lightweight RG-174 pigtail is recommended to prevent socket damage.
AM Performance (Supercharging): DXers often replace the internal 4-inch ferrite rod with a 7.5-inch loopstick to significantly boost MW/LW sensitivity. XHDATA D-808 - схема - Radioscanner.Ru xhdata_d808. pdf (2201.5 Kb) Radioscanner.Ru R.I.P. Original XHDATA D-808 (High Quality) Model
While a full official schematic for the XHDATA D-808 is not publicly released by the manufacturer, hobbyists and radio enthusiasts have extensively documented its internal architecture through teardowns and reverse engineering. Core Architecture and Components XHDATA D-808 Go to product viewer dialog for this item. XHDATA D-808 Go to product viewer dialog for this item
is a high-performance portable radio built on a Digital Signal Processing (DSP) platform. Its design is notable for several key technical features:
DSP Chipset: The heart of the radio is the Silicon Labs Si4735 DSP chip. This chip handles the heavy lifting of signal decoding for FM, AM (MW/LW), Shortwave, and SSB.
Dual-Board Design: Internally, the radio consists of two main circuit boards: an RF board and a control/display board, which are typically connected by a ribbon cable.
Version Differences: There are significant circuit variations between the "original" (pre-2021) and "new" versions.
Original Version: Includes more adjustable parts, such as 5 IF coils and 6 trimmer capacitors for fine calibration.
New Version: Simplifies the board to reduce manufacturing labor, featuring only about 3 adjustment points and a different audio amplifier.
SSB Support: The circuitry includes dedicated support for Single Side Band (SSB) with independent Upper Side Band (USB) and Lower Side Band (LSB) reception. Community Documentation and Resources
Because an official diagram is hard to find, many users rely on community-driven resources for repairs or modifications:
Internal Photos: Detailed teardowns on sites like the SWLing Post provide high-resolution photos of both sides of the PCB, allowing for visual tracing of circuits.
Modification Guides: Experts like Gary DeBock have published guides on "supercharging" the D-808, which often include pinout information for the ferrite loopstick and antenna connections.
User Manuals: For functional logic (rather than component-level circuitry), the Official XHDATA Manual explains the radio's complex memory and tuning systems.
If you are looking for specific component values for a repair, are you trying to fix a power issue, an antenna connection, or a tuning problem? R.I.P. Original XHDATA D-808 (High Quality) Model
The XHDATA D-808 is a legendary device in the world of portable shortwave and airband radio. For its price point (typically $80-$100), it offers performance that rivals units costing three times as much—namely the iconic Sony ICF-SW7600GR. It features Single Side Band (SSB), Synchronous Detection (Sync), a robust Airband receiver, and Bluetooth output.
However, like all mass-produced consumer electronics, things go wrong. The delicate telescopic antenna snaps, the USB-C port loosens, or the rotary encoder starts skipping. When that happens, owners face a dilemma: ship it back to China (costly and slow) or fix it themselves.
If you fall into the latter camp, you need one specific file: the XHDATA D-808 schematic. Unfortunately, finding an official service manual for this radio is notoriously difficult. This article serves as a comprehensive guide to understanding the D-808’s internal architecture, where to find or reverse-engineer its schematic, and how to troubleshoot common failures without a map.