This manual mainly introduces the repair safety tips, technical specifications, overall composition and machine core function characteristics, overall signal flow, main integrated circuits and component function introductions, key point waveform test charts (for reference only), maintenance modes, bus data, etc. of CHD-8 machine core
The CHD-8 chassis service manual covers all aspects needed by technicians to safely repair and adjust Changhong digital HDTV sets that use the CHD-8 board. It includes safety warnings, maintenance knowledge, technical specifications, and detailed descriptions of the chassis components and their functions.
The document is organized into chapters on safety, technical specs, chassis composition, signal flow, major IC functions, waveform reference, and the service (S) mode with bus data. It also provides step‑by‑step adjustment procedures for colour purity, convergence and white balance, as well as wiring diagrams and test waveforms. This manual is written in Chinese.
| Colour standards | PAL, NTSC358, NTSC4.43, SECAM |
|---|---|
| Sound standards | D/K, B/G, I, M |
| VHF channel range | 1‑12 |
| Power supply voltage | 150‑250 V ~ 50 Hz |
| Rated power consumption | 140 W |
Set the volume to 0, hold the mute key on the remote for 5 seconds, release it, then press the MENU key to enter S mode.