This document is a service manual for Hisense LCD TV LED55XT39G3D, LED46XT39G3D, LED42XT39G3D, mainly introducing the appearance, functional specifications, features, product differences, solution overview, circuit framework, power distribution, main board principle and other content.
This service manual provides detailed information for three Hisense LCD TV models (LED55XT39G3D, LED46XT39G3D, LED42XT39G3D). It includes product overview, appearance, functional specifications, differences between models, and the overall hardware scheme.
The document describes the circuit block diagram, power distribution, motherboard circuitry, interface definitions (HDMI, USB, VGA, AV, etc.), and step‑by‑step software upgrade procedures using USB or PC tools. It also contains instructions for key‑mapping, flash programming, and driver installation for the MSTAR tool. This manual is written in Chinese.
| Auxiliary voltage | 2.5 V |
|---|---|
| Core voltage for MST6i78 | 1.2 V (DC‑DC from 12 V) |
The manual provides USB and PC upgrade steps under the “USB 升级步骤及说明” and “PC 升级步骤及说明” sections.
Press the red‑circled button to open the key editor, then assign commands (e.g., “nand erase clean” for F1) and save.
Perform a hard reset by turning the TV off while holding the Enter key in SecureCRT, or issue a software reboot command.