Haier LE32B7600 Service Manual

If your Haier LE32B7600 TV has no power and the LED is off, first check the AC input and ensure the power is turned on. If the power is on, check the power board output to see if it is 12V. If the output is not 12V, replace the power board. If the output is 12V, check the IR board and LED. If the IR board is faulty, replace it. If the issue persists, replace the main board.

If your Haier LE32B7600 TV has no display and the LED is red, first check if the TV is under control and power on/off by remote control and power key. If it is, check if the backlight is 'On'. If the backlight is not 'On', check the LVDS cable and ensure the B/L signal is available. If the signal is not available, reinsert or replace the LVDS cable. If the Panel Vcc is 12V, replace the main board. If the power board output is not 12V, replace the power board. If the issue persists, you may need to replace the main board or the panel.

First, check if the remote control battery is properly placed and has power. If the battery is fine, try using another remote control. If that doesn't work, check if the IR board is abnormal. If the IR board is fine, you may need to replace the main board.

The YPbPr video input on the Haier LE32B7600 shares the connector with the CVBS input. You can connect an external device to the YPbPr input by using the appropriate RCA jacks and ensuring the connections are secure.

The SPDIF (Sony/Philips Digital Interface Format) output on the Haier LE32B7600 is used to transmit digital audio signals to an external audio device, such as a soundbar or AV receiver, for improved audio quality. It is connected through a coaxial cable to the SPDIF_OUT connector.

To troubleshoot 'DC OFF' and 'AC OFF' issues, you should check the components and connections related to the power supply, such as R642, C664, and the associated resistors and capacitors. Ensure that all components are functioning correctly and that there are no loose or damaged connections.

The components labeled as 'FB9902' and 'FB9904' are identified as 'BEAD'. These are likely ferrite beads used for noise suppression and filtering in the power board circuit.

The component labeled as 'TL431G-AE2-R' is a precision programmable reference voltage source. It is likely used for voltage regulation and stabilization in the power board circuit.

The backlight specification for the Haier AP 43" is 31 ~ 37 V/ 1.675 A.

The component labeled 'R9128' is a 100 OHM 1/4W resistor, which is likely used in the circuit for voltage regulation or current limiting.