Self Diagnosis Function - Sony KP-61HS20 - 61" Projection Tv Service Manual

1. Summary of Self-Diagnosis Function
• 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.
2. Diagnosis Items and Prediction of Malfunction Location
• 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.
• The screen display displays the results regarding all the diagnosis items listed below. The display " 0 " means that no malfunc-
tions occurred.
No. of times
Diagnosis Item TIMER/STANDBY
indicator blinks
Power does not turn on
+B overcurrent (OCP)
2 times
(See Note 1)
+B overvoltage (OVP) 3 times
Vertical deflection stopped 4 times
White balance failure
5 times
(Not balanced)
LOW B OCP/OVP
(Overcurrent/over voltage) 6 times
(See Note 3)
Horizontal deflection stopped 7 times
High voltage error 8 times
Audio error 9 times
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.
3. Blinking count display of TIMER/STAND BY indicator
< FRONT PANEL >
TIMER/STAND BY indicator
Release of TIMER/STAND BY indicator blinking.
• 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.
SECTION 1

SELF DIAGNOSIS FUNCTION

Probable Cause Location
•Power cord is not plugged in.
0
• Fuse is burned out (F6001) (G board)
• H. OUT (Q8024) is shorted. (D board)
• +B PWM (Q8035, 8038) is shorted. (D board)
• IC501 is faulty (G board)
• IC5002 is faulty (G board)
• +- 15V is not supplied. (D board)
• IC8003 is faulty. (A board)
• 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)
• +5 line is overloaded. (A, B boards)
• +5 line is shorted. (A, B boards)
• Q8035, 8038 is shorted. (D board)
• T8005 is faulty. (D board)
• +- 19V line is shorted. (A, B boards)
• IC708 is faulty. (A board)
• PS701 or PS702 is opened. (A board)
* One blink is not used for self-diagnosis.
•EXAMPLE
<Diagnosis Items> <Number of Blinks>
• +B overcurrent
• +B overvoltage
• Vertical deflection stop
Lamp ON : 0.3 seconds
Lamp OFF : 0.3 seconds
KP-43HT20/53HS20/53HS30/61HS20/61HS30
RM-Y908 RM-Y908
Deteced symptoms
• Power does not come on.
• No power is supplied to the unit.
• AC power supply is faulty.
• Power does not come on.
• Load on power line is shorted.
• Has entered standby mode.
• Has entered standby state after horizontal raster.
• Vertical deflection pulse is stopped.
• Power line is shorted or power supply is stopped.
• No raster is generated.
• CRT cathode current detection reference pulse output is small.
• No picture
• No picture
• No sound
2 times
3 times
4 times
Lamp OFF :
3.0 seconds
– 5 –
RM-Y908 RM-Y908 RM-Y908