Sony KDF-55XS955 Service Manual page 9

Clearing the Result Display
To clear the result display to "0", press the buttons on the Remote Commander sequentially when the diagnostic screen is displayed, as shown below:
1. If the screen is already displayed, proceed to step 3. If not, Power off (Set to Standby model).
2. Press Display
Channel 5
ENTER
3. Press Channel 8
Clearing the Self-Diagnostic Screen
The self diagnosis screen display is cleared by turning off the set using the Remote Commander or the power switch.
Self-Diagnostic Circuit
Self-Diagnosis Function Operation
3 : Lamp cover
4 : Fan
4 : Temp
5 : Lamp driver
6 : Low B error
7 : Audio
8 : D-OVP
10 : ATSC-OVP
LAMP : Lamp
KDF-55XS955/60XS955
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Sound Volume -
Power ON
The rib at the back of the lamp cover closes the SW on the T board to ground pin 3 of CN8001.
It is monitored by the DE-micro (pin 94 of IC6902) and turns off the lamp when it is opened.
Fan rotation is detected by "FAN-PROT" and the DE-micro (pin 92 of IC6902) turns off the lamp
when it is "high".
When the temperature sensor on the H3 board (WE models) or H4 board (WF/XS models)
detects high temperature, or IIC-E line connector (CN6022:G2 board, CN44:H3board/H4board)
is not seated securely, the DE-micro turns off the lamp.
When the "LAMP-PROT" (pin 95) is low, the lamp is not turned on. If the "LAMP-HV-DET"
(pin 96) is low at the same time, it is classified as no high voltage of the lamp driver.
When no "DD 6V " is detected, pin 129 of TV-micro is low and it turns off the main power.
When DC voltage is detected at the speaker or woofer outputs, pin 128 of TV-micro is low and it
turns off the main power.
When overvoltage of "+3.3V" or "+2.5V" is detected, pin 126 of TV-micro is low and it turns off
the main power.
When no "Digital Module 5V" is detected, pin 127 of TV-micro is low and it turns off the main
power.
When the "LAMP-PROT" (pin 95) is low, the lamp is not turned on. If the
"LAMP-HV-DET" (pin96) is high at the same time, it is classified as no lamp or a dead lamp.
KDF-55XS955/60XS955
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