Thursday, December 31, 2015

SONY KP-57WV600 - KP-57WV700 - KP-65WV600 - KP-65WV700 Service mode Led blinking and power supply circuit

SONY KP-57WV600 - KP-57WV700 - KP-65WV600 - KP-65WV700

SELF DIAGNOSTICS
If an error occurs, the STANDBY/TIMER LED will automatically begin to flash. The number of times the LED flashes translates to a probable source of the problem. A definition of the STANDBY/TIMER LED flash indicators is listed in the instruction manual for the users knowledge and reference. If an error symptom cannot be reproduced, the Remote Commander can be used to review the failure occurrence data stored in memory to reveal past problems and how often these problems occur.
Diagnostic Test Indicators
When an error occurs, the STANDBY/TIMER LED will flash a set number of times to indicate the possible cause of the problem. If there is more than one error, the LED will identify the first of the problem areas. Results for all of the following diagnostic items are displayed on screen. If the screen displays a 0, no error has occurred.
No. of times STANDBY / TIMER lamp flashes
Probable Cause Location
Detected Symptoms
Does not light


Power cord is not plugged in.
Fuse is burned out (F501). (A Board)

Power does not come on.
No power is supplied to the TV.
AC Power supply is faulty.
2 times


H.OUT(Q8024) is shorted. (D Board)
+B PWM (Q8035) is shorted. (D Board)

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

3 times
4 times




IC6504 is faulty. (D Board)
15V is not supplied. (D Board)
IC8003 is faulty. (D Board)



Has entered standby mode.
Has entered standby mode after
Horizontal raster.
Vertical deflection pulse is stopped.
Power line is shorted or power
supply is stopped.
5 times



Video OUT(IC9101, IC9201, IC9301)
is faulty. (CR, CG, CB Board)
CRTdrive (IC2801) is faulty. (B Board)
G2 is improperly adjusted.**
No raster is generated.
CRTcathode current detection
reference pulse output is small.


6 times



+5 line is overloaded. (A, B, M Boards)
 +5 line is shorted. (A, B, M Boards)
IC504 is faulty. (A Board)

No picture


7 times

No picture

If a +B overcurrent is detected, stoppage of the vertical deflection is detected simultaneously. The symptom that is diagnosed first by the microcontroller is displayed on the screen.
If STANDBY/STEREO LED flashes six (6) times, unplug the unit and wait 10 seconds before performing the adjustment.
Release of TIMER STAND BY indicator blinking
The TIMER/STANDBY indicator blinking display is released by turning OFF the power switch on the TV main unit or removing the plug from the power.
Self-Diagnosis Screen Displays
In cases of malfunctions where it is not possible to determine the symptom such as when the power goes off occasionally or when the screen disappears occasionally, there is a screen display on whether the malfunction occurred or not in the past (and whether the detection circuit operated or not) in order to allow confirmation.
Screen Display Method
Quickly press the remote command button in the following order from the standby state.
Display > Channel 5 > Sound Volume - >Power ON
Self-Diagnosis Screen Display
The results display is not automatically cleared. In case of repairs and after repairs, check the self-diagnosis screen and be sure to return the results display to  0 .
If the results display is not returned to 0  it will not be possible to judge a new malfunction after completing repairs.
Method of Clearing Results Display
1. Power off (Set to the stanby mode.)
2. Display > Channel 5 > Sound Volume + > Power ON (Service Mode)
3. Channel 8 ENTER (Test reset = Factory preset condition)
Method of Ending Self Diagnosis Screen
When ending the self-diagnosis screen completely, turn the power switch OFF on the remote commander or the main unit.
Self-Diagnosis Function Operation
+B overcurrent (OCP)
Occurs when excessive current flows through R5013. The increase in voltage across R5013 causes the output of Q5004 to go high, and this high signal goes to the micro.
+B overvoltage (OVP)
IC6505 detects +B OVP condition and turns on Q6522. This sends a high signal to the micro and also shuts down the AC relay.
V-STOP
Occurs when an absence of the vertical deflection pulse is detected by pin 24 of IC2801 (B Board). Power supply will shut down when waveform interval exceeds 2 seconds.
White Balance Failure
If the RGB levels do not balance within 2 seconds after the power is turned on, this error will be detected by IC2801. TV will stay on, but there will be no picture.
Low B OCP/OVP
Occurs when set 5V is out.
Horizontal Deflection Stopped Occurs when either:
1) a +B overcurrent is detected (IC5007), or
2) overheating is detected (Thermistor TH5002).
METHOD OF ENTERING THE SERVICE ADJUSTMENT MODE
SERVICE MODE PROCEDURE

1. TV must be in Standby mode. (Power off)
2. Press “DISPLAY”, “5”, “VOL +”, then “POWER” on the remote commander.
3. The screen displays the item being adjusted within that category.
4. Press 1 or 4 on the remote commander to select the adjustment item
5. Press 3 or 6 on the remote commander to change the data
6. Press 2 or 5 on the remote commander to select the adjustment category
7. If you want to go back to the most recently saved value, press “0” then “ENTER” to read the memory.
8. Press “MUTING” then “ENTER” to write the new adjustment data into memory.
9. Turn power off when you want to exit the service mode.
Note: Press “8” then “ENTER” on the remote commander to restore the factory settings for user controls and channel memories (this will also turn set off and then on to exit the service mode).
MEMORY WRITE CONFIRMATION METHOD
1. After adjustment, turn the power off with the remote commander.
2. Turn the power ON and set to service mode.
3. Cycle through the adjusted items again and confirm that the adjustments were saved.
OPERATION CHECK
1. Receive the dot signal.
2. Set PIC MIN/BRT MIN.
3. Confirm that the voltage between cathode of D8038 (JW171) and GND is more than 23.0V DC.
4. Using an external DC Power supply, apply the voltage shown below between cathode of D8038 (JW171) on ìDî and GND, then confirm that the HV-Prot circuit works. (Raster disappears)
Apply DC voltage: Less than 29.05V DC.
HV HOLD-DOWN ADJUSTMENT
1. Connect a HV static voltmeter to the unconnected plug of the high-voltage block.
2. Power on the set.
3. Connect an external 10kΩ VR at CN8015 and adjust this VR so that the high voltage is 34.50kV.
4. Adjust VR8002 to the point that the HV-Prot circuit works (Raster disappears) at 34.50 ± 0.50kV reading on the static voltmeter.
5. After adjustment, put the VR cover on VR8002 and apply sufficient amount of epoxy resin around VR8002 as the same manner for VR8001.
G BOARD
+B MAX VOLTAGE CONFIRMATION

The following adjustments should always be performed when replacing IC6503 R6518.
1. Supply 130VAC to variable autotransformer.
2. Receive dot signal pattern and set the PICTURE and BRIGHTNESS settings to their minimum.
3. Confirm the voltage of TP +B 135V is less than 137.0Vdc.
4. If step 3 is not satisfied, replace IC6503 and repeat steps 1-3.
+B OVP CONFIRMATION
1. Add to low voltage power supply between to TP. 6502 and ground.
2. Supply 120VAC to variable autotransformer.
3. Power on the Set and receive dot signal pattern.
4. Set the PICTURE and BRIGHTNESS settings.
5. Check the OVP is activated. Operate :less than 2.50V
POWER SUPPLY SCHEMATICS 
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