Sony KDX-46Q005 Service Manual page 8

•DISPLAY UNIT (XDM-F4600Q)
Diagnosis item
LED POWER ERR
FAN P-TEMP
POWER (G_PROT)
AU PROT
LED ERR
POWER ERR (PS_PROT)
Number of
LED(POWER ON/STANDBY)
blink times
Green/red alternate blinking
4 times
6 times
7 times
9 times
11 times
Possible cause (faulty location)
• Main converter primary circuit, F/B circuit,
rectifier diodes.
• SUB11V circuit.
FAN • Fan (or fan stop due to dust or other causes).
HARNESS • Disconnection of fan relay connector,
short-circuit/disconnection due to cable catching.
• Fan drive circuit.
• Excessively high ambient temperature or overheat
of Panel unit (due to dust, etc.)
• SUB6.5V/P_VCC circuit.
• 3.3V, 1.8V (generated from SUB6.5V).
• Speaker output DC (over 2VDC).
• Audio_VCC short-circuit.
• Sub_11V short-circuit
• LED backlight microcomputer communication
error ("No Ack" continues for a predetermined time).
BL (LED) • LED_ERROR: LEDs/arrays in BL (open).
• TEMP_ERROR: LED backlight overheat.
• TEMP SENSOR_ERROR: Boards, I2C bus, harness
disconnection (including communication error)
• PHOTO SENSOR_ERROR: Boards, interface bus,
harness disconnection
(including communication error).
FAN • FAN_ERROR: Fan, fan drive circuit, harness
disconnection
LCD • P_VCC circuit.
• P_VCC (LCD panel power) short-circuit in
T-CON board of LCD.
Failure part etc.
KDX-46Q005 (UC) 1-2E