Sony TRINITRON KV-ES38N90, Руководство по обслуживанию

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KV-ES38N90
RM-958
5. HANDLING OF SELF-DIAGNOSTIC SCREEN DISPLAY
Since the diagnostic results displayed on the screen are not automatically cleared, always check the self-diagnostic
screen during repairs. When you have completed the repairs, clear the result display to “0”.
Unless the result display is cleared to “0”, the self-diagnostic function will not be able to detect subsequent faults after
completion of the repairs.
[Clearing the result display]
To clear the result display to “0”, press buttons on the remote commander sequentially as shown below when the
diagnostic screen is being displayed.
Channel
[8]
/ 0
[Quitting Self-diagnostic screen]
To quit the entire self-diagnostic screen, turn off the power switch on the remote commander or the main unit.
6. SELF-DIAGNOSTIC CIRCUIT
IC4301
RGB JUNGLE
CXA2100Q
OVP OCP
FROM
CRT (IK)
[V] D6806/D6801
IC001
SYSTEM
SDA
SDA
IC003
MEMORY
IC004
MEMORY
IKIN
XRAY
LED
5 25
20
54
3
6
V PROT 16
5
[H]
IC6801
[+B overcurrent ªOCPº]
Occurs when an overcurrent on the +B(135) line is detected by
Q6610 and Q6609.
If Q6610 and Q6609 go to ON, the voltage to the pin3 of IC001 go to
UP. The unit will automatically turn off.
[+B overvoltage ªOVPº]
Occurs when an overvoltage on the +B(135) line is detected by
D6635, Q6611 and Q6612. If Q6611 and Q6612 go to ON, the
voltage to pin6 of IC001 go to UP. The unit will automatically turn off.
[Vertical deflection failure]
Occurs when an absence of the vertical deflection pulse is detected
by Q6811, Q6819, Q6820, Q6821 and D6801. Shut down the power
supply.
[White balance failure]
If the RGB levels do not balance or become low level within 5
seconds. This error will be detected by IC4301.
TV will stay on, but there will be no picture.
[High voltage protector of Horizontal Deflection]
Occurs when an overvoltage of horizontal pulse is detected by
D6809 and IC6801.
If the voltage of 7 pin of IC6801 goes to High, the voltage to pin20 of
IC4301 go to UP. The unit will automatically turn off.