Service Modes, Error Codes, and Fault Finding
5.
STANDBY SEQUENCE
The following flowchart depicts the Standby (plus Semi-
Standby condition) sequence:
Figure 5-12 Standby flowchart
RISC START
Disable AP RC/LKB key
Stop Backlight Dimming
PWM_DIMMING = 100%
Turn Off Backlight
BACKLIGHT_ON_OFF = LOW
Switch off LVDS Signal
Wait for Panel_Off_Time_3
based on Panel ID in ms (from
Panel Flash)
Turn Off LVDS Power,
LCD_PWR_ON = HIGH
PWM_Dimming = 0%
Disable DC_PROT &
POWER_DOWN INT
Pass Error Buffer and CEC Info
to T8032
Switch IR/GPIO control from
RISC to T8032
Mute Audio, MUTEn = HIGH
Notify T8032 to go to Standby
END
(STANDBY)
Wait 3000ms to block next
startup to ensure PSU properly
dischaged
T8032 blinks LED2 according to
Error Buffer
STANDBY due
to Protection?
No
Yes
Receive Standby Command
T8032 START
Turn off LED1
Set Last Status = STANDBY
No
Wait for Panel_Off_Time_2
based on Panel ID in ms (from
Panel Flash)
PBS Semistandby
Yes
Turn off LED
Switch off backlight
SemiStandby
1
8
490_206_090409.ep
s
090409