Read Sony KV-DA29M31 Service Manual online
– 5 –
KV-DA29M31/M86
RM-W105
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".
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.
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.
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.
To quit the entire self-diagnostic screen, turn off the power switch on the remote commander or the main unit.
6. SELF-DIAGNOSTIC CIRCUIT
[+B overcurrent OCP ]
Occurs when an overcurrent on the +B(135) line is detected by Q6804.
If Q6804 go to ON, the voltage to the pin57 of IC4301 go to "HIGH".
The unit will automatically turn off.
If Q6804 go to ON, the voltage to the pin57 of IC4301 go to "HIGH".
The unit will automatically turn off.
[High voltage protector of Horizontal Deflection]
Occurs when an overvoltage of horizontal pulse is detected by D6809.
If the voltage of anode D6809, Q6814 and D6808 goes to High, the
voltage to pin57 of IC4301 go to "HIGH".
The unit will automatically turn off.
If the voltage of anode D6809, Q6814 and D6808 goes to High, the
voltage to pin57 of IC4301 go to "HIGH".
The unit will automatically turn off.
[+B overvoltage OVP ]
Occurs when an overvoltage on the +B(135) line is detected by D6635
and Q6611. If Q6611 go to ON, the voltage to pin6 of IC001 go to
"HIGH". The unit will automatically turn off.
and Q6611. If Q6611 go to ON, the voltage to pin6 of IC001 go to
"HIGH". The unit will automatically turn off.
[Vertical deflection failure]
Occurs when an absence of the vertical deflection pulse is detected by
Q6808 and R6910. Shut down the power supply.
Q6808 and R6910. 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.
This error will be detected by IC4301.
TV will stay on, but there will be no picture.
[5V/9V failure]
Occurs when 5V/9V is not supplied to Mcon (IC001).
No raster will be detected or no picture.
No raster will be detected or no picture.
IC4301
RGB JUNGLE
CXA2170AQ
OVP
FROM
CRT (IK)
[V] Q6808, R6910
IC001
SYSTEM
SDA
SDA
9V
5V
IC004
MEMORY
IK_IN
H PROT
RED LED
5
24
57
7
6
V PROT
56
[OCP] Q6804, D6821
[H] D6808, D6809
84
14,47,
82
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