Haier DTA-1496 Service Manual

The Haier DTA-1496 supports 4:3PS and 4:3LB video formats.

The Haier DTA-1496 supports Dolby AC-3 audio decoding.

To adjust the horizontal shift, you can use the direct access key '1' and select the item '5/6HSH'. This item is adjustable and allows you to modify the horizontal shift settings.

To enable the Arabic language setting, you need to set the ARABIC_SET bit to 1. This can be done by accessing the OP2 settings and enabling the corresponding bit.

The HALFTONE function is used to enable a specific display mode. To enable the HALFTONE function, you need to set the HALFTONE bit to 1 in the OP2 settings.

Enabling the 'HOTEL' function allows for specific settings or features that are typically used in hotel environments. This could include features like automatic channel selection, or other settings that are commonly used in hotel rooms.

To enable the 'DIRECT_SWITCH_ON' function, you need to set the corresponding bit to 1. This function, when enabled, allows the device to switch on directly to a specific mode or setting without additional steps.

The 'TUNER AGC' output is used for Automatic Gain Control in the tuner section of the TV. It helps in maintaining a consistent signal level for better reception and performance.

Under normal power supply conditions, the MTK1389D mono-chip initialization process involves the reset circuit resetting the MTK1389D, followed by the crystal oscillator circuit providing a clock signal. The MTK1389D then performs an initialization check for Flash, E2PROM, and SDRAM. If these components are normal, it proceeds to check the built-in Audio DAC, servo, and motor Driver IC. If all parts are good, the MTK1389D sends a signal to the motor Driver to drive the servo system, pick up the DVD light for collection, and trace the main shaft to check for a disc and confirm its format.

To adjust the main voltage, you can use the resistor R817A. It is adjustable and allows you to select between 150, 220, or 330 volts.