Brand: Haier
Category: Televisions
Document Type: Manual
Language: EN
Manual for HLE20BB
Uploaded: Nov. 21, 2025, 9:20 p.m.
Main Unit Description: Details control panel functions, including TV/AV selection, menu navigation, volume and channel control, and power switch operation.
Connection Options: Explains various input and output connections such as DC Power, AV/S-VIDEO/COMPONENT Audio, Antenna, DVD/DTV, PC Audio, D-SUB, Video, and Earphone ports.
Features: Lists technical specifications of the 15HL25S model, covering aspects like screen size, resolution, brightness, response time, color system, and various input/output functionalities.
Remote Control Key Functions: Illustrates and describes the function of each button on the remote control, including MUTE, RECALL, DISPLAY, MENU, TV/AV, etc.
ICs Function Description: Provides a detailed breakdown of the functions of various integrated circuits (ICs) used in the TV, including their pin assignments and descriptions.
Troubleshooting: Offers step-by-step guides and flowcharts to diagnose and resolve common issues related to Power Supply, Display (Black, White, Exceptional Screen), Audio (No Audio, TV No Audio, TV Audio Abnormal), and Function (TV, PC, AV/SV SCART) problems.
Troubleshooting and error codes
| Trouble Area | Symptom | Possible Cause | Solution |
|---|---|---|---|
| Power Supply | No Power / Unit won't turn on | Blown fuse (F1) | Check and replace F1. |
| No Power / Unit won't turn on | Faulty power supply net | Check the power supply net. | |
| No Power / Unit won't turn on | MCU issues | Check MCU, power supply, and crystal. | |
| Low Voltage Output | Faulty LDO or load shorted | Change LDO or check for shorted load. | |
| Display | Black Screen | No 5V for BLON on CN7 | Check 5V for BLON on CN7. |
| Black Screen | No 12V inverter input | Check 12V inverter input. | |
| Black Screen | Power supply issue | Check the power supply. | |
| Black Screen | MCU issues | Check MCU, power supply, and crystal. | |
| White Screen | Incorrect power supply for panel | Check power supply for the panel. | |
| White Screen | Incorrect voltage on Q23 | Check Q23 voltage (5V or 12V). | |
| White Screen | Incorrect voltage on Q24 | Check Q24 voltage. | |
| White Screen | U5/RTD2023B signal output issue | Check signal output of U5/RTD2023B. | |
| White Screen | LCD or Panel Connector issue | Check LCD or Panel Connector. | |
| Exceptional Screen | Incorrect panel voltage | Select the right panel voltage. | |
| Exceptional Screen | Panel connector issue | Check the panel connector. | |
| Exceptional Screen | LCD issue | Check LCD. | |
| Exceptional Screen | Output net/connector issue | Check the output net, the connector. | |
| Exceptional Screen | U5 power supply & timer circuit issue | Check U5 for power supply & timer circuit. | |
| Audio | No Audio | No audio signal input | Check audio signal input. |
| No Audio | Volume/mute settings | Check volume and mute settings. | |
| No Audio | Signal from C11 issue | Check signal from C11. | |
| No Audio | Power issue with U20/TPA1517NE | Check U20 PIN8 ≥ 9.2V. | |
| No Audio | Signal input issue for U20 | Check U20 PIN1 and PIN9 for signal input. | |
| No Audio | Signal output issue for U21 | Check U21 PIN60,61 for signal output. | |
| No Audio | Input audio issue (AV/PC) | Check input audio for AV (U21 PIN49,50) or PC (U21 PIN53,54). | |
| No Audio | Net issue between U21 and U20 | Check the net between U21 and U20. | |
| TV No Audio (with picture) | SAW2 issue | Check SAW2. | |
| TV No Audio (with picture) | U21 PIN issue | Check U21 PIN29,30. | |
| TV No Audio (with picture) | Power supply issue for U21 | Check power supply of U21. | |
| TV No Audio (with picture) | Damaged U21 | Make sure U21 is not damaged. | |
| TV No Audio (with picture) | Net issue between SAW2 and C133 | Check the net between SAW2 Pin1 and C133/0.01μF. | |
| TV Audio abnormal | Noise and NICAM not detected | Check the audio system. | |
| TV Audio abnormal | Picture not normal | If picture is normal, proceed to check components C113, D26, R140 or change SAW2. | |
| Function | TV Can not search/No Picture | RF signal input issue | Check RF signal input. |
| TV Can not search/No Picture | Voltage issue on T1/TDQ-6H3 | Check voltages on T1/TDQ-6H3 pins (3, 4,5, 9). | |
| TV Can not search/No Picture | I²C signal issue | Check I²C signal T1 PIN4,5. | |
| TV Can not search/No Picture | Net issue between T1 and U21 | Check the net between T1 PIN11 and U21 PIN24,25. | |
| TV Can not search/No Picture | Component issue on T1/TDQ-6H3 | Change T1/TDQ-6H3. | |
| TV Can not search/No Picture | Repair issue with the circuit | Examine and repair the circuit. | |
| TV Can not search/No Picture | I²C net issue with U25/SM5964 | Check I²C net (connect with U25/SM5964 PIN16,17). | |
| TV Can not search/No Picture | Component issue on R267/02 | Examine and repair R267/02. | |
| TV Can not search/No Picture | Power supply net issue | Examine and repair the power supply net. | |
| PC | Picture not in center | Auto adjust required | Auto adjust. |
| Picture not in center | Reset needed | Reset. | |
| Picture not in center | R,G,B circuit issue | Check R,G,B circuit. | |
| Missing color | RGB input issue for U5 | Check U5 RGB input. | |
| Picture dithering | VS,HS signal issue | Check VS,HS signal. | |
| Picture dithering | OSD setting/Reset issue | Check OSD setting, Reset. | |
| Picture dithering | VS.HS issue | Check VS.HS. | |
| No signal | VS,HS circuit issue | Check VS, HS circuit. | |
| AV/SV SCART | No signal | Check VS, HS circuit | Check VS, HS circuit. |
| Missing color | Reset needed | Reset. | |
| Missing color | RGB input issue for U5 | Check RGB signal input for U5. | |
| No signal (except PC) | Power supply issue for U21 | Check the circuit for power supply of U21. |