KP-51HW40, KP-57HW40 - Sony TV Service Manual (repair manual). Page 5

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This device includes a self-diagnosis function.

•

In case of abnormalities, the TIMER/STAND BY indicator automatically blinks.  It is possible to predict the abnormality location

by the number of blinks.  The Instruction Manual describes blinking of the TIMER/STAND BY indicator.

•

If the symptom is not reproduced sometimes in case of a malfunction, there is recording of whether a malfunction was generated

or not.  Operate the remote command to confirm the matter on the screen and to predict the location of the abnormality.

•

When a malfunction occurs the TIMER/STAND BY indicator only blinks for one of the following diagnosis items.  In case of

two or more malfunctions, the item which first occurred blinks.  If the malfunctions occurred simultaneously, the item with the

lower blink count blinks first.

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The screen display displays the results regarding all the diagnosis items listed below.  The display “ 0 ” means that no malfunc-

tions occurred.

Lamp OFF : 
3.0 seconds

Lamp ON : 0.3 seconds

Lamp OFF : 0.3 seconds

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The TIMER/STAND BY indicator blinking display is released by turning OFF the power switch 
on the TV main unit or removing the plug from the power.

*

 One blink is not used for self-diagnosis.

•EXAMPLE

<Diagnosis Items>  <Number of Blinks>

• +B overcurrent  

2 times

• +B overvoltage

3 times

• Vertical deflection stop

4 times

< FRONT PANEL >

TIMER/STAND BY indicator

Note1: If a +B overcurrent is detected, stoppage of the vertical deflection is detected simultaneously. The sympton that is diagnosed first by the microcontroller is displayed on screen.
Note 2: Refer to Screen (G2) Adjustment in Section 3-1, 2 of this manual.
Note 3: If TIMER/STANDBY indicator blinks six (6) times, unplug the unit and wait 10 minutes before performing the adjustment.

7 times

Horizontal deflection stopped

• Q8035, 8038 is shorted. (D board)

8 times

High voltage error

• T8005 is faulty. (D board)

0

Power does not turn on

 •Power cord is not plugged in.
• Fuse is burned out (F6001) (G board)

• Power does not come on.
• No power is supplied to the unit.
• AC power supply is faulty.

2 times

+B overcurrent (OCP)
(See Note 1)

• H. OUT (Q8024) is shorted. (D board)
• +B PWM (Q8035, 8038) is shorted. (D board)

• Power does not come on.
• Load on power line is shorted.

3 times

+B overvoltage (OVP)

• IC501 is faulty (G board)
• IC5002 is faulty (G board)

• Has entered standby mode.

4 times

Vertical deflection stopped

• +- 15V is not supplied. (D board)
• IC8003 is faulty. (A board)

• Has entered standby state after horizontal raster.
• Vertical deflection pulse is stopped.
• Power line is shorted or power supply is stopped.

5 times

White balance failure
(Not balanced)

• Video out (IC7101, 7201, 7301) is faulty. (CR, CG, CB board)
•CRT drive (IC309) is faulty. (A board)
•G2 is improperly adjusted. (See Note 2)

• No raster is generated.
• CRT cathode current detection reference pulse output is small.

6 times

LOW B OCP/OVP
(Overcurrent/over voltage)
(See Note 3)

• +5 line is overloaded. (A, B boards)
• +5 line is shorted. (A, B boards)

• No picture
• No picture

Audio error

9 times

• +- 19V line is shorted. (A, B boards)
• IC708 is faulty. (A board)
• PS701 or PS702 is opened. (A board)

• No sound