Brand: Haier
Category: Televisions
Document Type: Manual
Language: EN
Manual for 21FA18-T
Uploaded: Nov. 21, 2025, 6:59 p.m.
Manual Publish Date: 2007-06-25
Warranty Information
This manual does not contain warranty information.
1. SPECIFICATIONS
Refer to page 3 for detailed specifications of the TV model.
4. ADJUSTMENT
A. Factory adjustment information:
- Operation: Set volume to zero. Press "V-" on TV and "DISP" on remote simultaneously to enter "S" state. Press "DISP" again to exit "S" state. Repeat to enter "D" mode, indicated by "D" on screen.
- Adjustment: Use PRO-/PRO+ buttons to select items. Use VOL-/VOL+ buttons to adjust values.
- Exit: Press POWER button to switch off and return to normal.
B. Maintenance menu (Table 8)
Refer to pages 11-18 for a comprehensive list of maintenance menu functions, their descriptions, reference values, and initializations.
7. CIRCUIT EXPLANATION
1. Microprocessor and Small signal processing (Haier8873): Details integrated circuit functions, including image amplification, sound amplification, scan, color decoding, and I²C bus control. Refer to Table 1 for testing data.
2. Sound power amplifying circuits: Composed of IC AN7522N and peripheral components. Table 4 provides testing data.
3. Vertical sync and vertical scan output circuits: Describes signal processing for vertical sync and scan, mentioning IC N401 (STV9302A). Table 5 provides testing data.
4. Horizontal sync and horizontal scan output circuits: Explains horizontal oscillation and scanning processes within IC N201.
5. Video amplifying circuits: Details video amplification using transistors and control via an I²C serial bus system.
Troubleshooting and error codes
| Symptom | Check these things |
|---|---|
| TV is not turned on | • Be sure the power cord is plugged in. |
| Good picture, no sound | • The MUTE function may be used. • Adjust the volume of the TV set. |
| Poor color / tint, good sound | • The contrast, color and tint may be incorrectly adjusted. • If you change the direction of the TV while the TV is on, the picture may suffer from color shading. If so, turn off the TV and allow about 30 minutes to cool, then turn on the TV again. |
| Spots appear on the screen | • The broadcast signal may be jammed by other electrical sources such as cars, motorcycles, electric trains, high tension lines, neon signs, hair dryers. |
| Lines appear on the screen | • The broadcast signal may be jammed by other TV receivers, personal computers, and TV games, as well as interference from radio stations. |
| Double images or ghosts | • Interference may be due to broadcast waves reflected from mountains or buildings. |
| Snowy picture or black screen | • Check if the direction of the antenna is changed. • The antenna may be disconnected or falling out. • Check if the direction of the antenna is changed. |
| Remote control does not work | • The batteries in the remote control may be exhausted. • The batteries may be improperly installed. • Check if there are obstacles between the remote control and the remote (infrared ray) receiver. • Check if there is strong light interference around the remote (infrared) receiver. • Check if the main power is ON. |
The following conditions are not troubles:
| Condition | Explanation |
|---|---|
| Clacking noise inside the receiver | • It may result from the expansion of the shell caused by a temperature change. This will not affect the picture and sound quality. |
| Uneven colour in a certain portion of the screen | • If the picture is too bright, this may occur according to the nature of the pictures. Reduce the contrast, it may resume to normal. |