Self Diagnosis Function - Sony KDP-57XBR2 Service Manual

1. Summary of Self-Diagnosis Function
• This device includes a self-diagnosis function.
• In case of abnormalities, the STANDBY/i. LINK STANDBY indicator automatically blinks. It is possible to predict the abnormality
location by the number of blinks. The Instruction Manual describes blinking of the STANDBY/i. LINK STANDBY 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 STANDBY/i. LINK STANDBY 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 malfunctions
occurred.
No. of times
Diagnosis Item STANDBY / i. 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
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 STANDBY/i. LINK STANDBY indicator blinks six (6) times, unplug the unit and wait 10 minutes before performing the adjustment.
3. Blinking count display of STANDBY / i. LINK STANDBY indicator
< FRONT PANEL >
POWER
STAND BY/
i.LINK STAND BY
TIMER
STANDBY/i. LINK STANDBY indicator
Release of STANDBY/i. LINK STANDBY indicator blinking.
• The STANDBY/i. LINK STANDBY 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)
• IC6104 is faulty (G board)
• PH6002 is faulty (G board)
• ±15 V is not supplied. (D board)
• IC8003 is faulty. (D board)
• Video out (IC3701, 3801, 3901) is faulty. (CR, CG, CB board)
• CRT drive (IC3006) is faulty. (A board)
• G2 is improperly adjusted. (See Note 2)
• LOW +B line is overloaded. (A, B boards)
• LOW +B line is shorted. (A, B boards)
• Q8035, 8038 is shorted. (D 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
• 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
2 times
3 times
4 times
– 6 –
KDP-57XBR2/65XBR2
Deteced symptoms
Lamp OFF :
3.0 seconds
RM-Y185