HITACHI CMP402HDE
Manual de Servicio

Picture is not displayed (LED is lit)

Is the LED red or green? green Do the Fans rotate?

red

Is the voltage applied to pin ² (PAS) No of the Signal PWB correct? Yes

No

AC/DC Power unit

Yes

With J106 (AC/DC Power unit) disconnected, is the picture displayed?

No

² +5.6V ´ GND

AC/DC Power unit Yes DC Fan No low (0V)

Is the voltage of pin - (J104) on the AC/DC Power unit 5V?

Is Voltage of the pin - (PAS) on the Signal PWB high? high (5V) Signal PWB

Yes Are the voltages of pins ¯, ² (J103) on the AC/DC Power unit correct? Yes ¯ +165V ² + 70V ¬ GND Are the voltages of the DC/DC Power unit correct?

AC/DC Power unit

AC/DC Power unit

No

Is the voltage of pin ³ (J102) on the AC/DC Power unit correct? No Yes ³ +3V ´ GND AC/DC Power unit

No (1.5V)

Panel Module

Yes See page 6 Panel Module DC/DC Power unit

5