Tuesday, January 26, 2016

SONY KLV-V26A10 - KLV-V32A10 - KLV-V40A10 Service mode - led blinking error codes - Service mode adjustments - LCD television repair and service - Manual tips

Category: LCD Television Repair and Service 
Contents of this article 

  • How to access service mode 
  • LED Blinking and causes 
  • White balance adjustment  



SONY KLV-V26A10 - KLV-V32A10 - KLV-V40A10

SELF-DIAGNOSIS FUNCTION
LED BLINKING PATTERNS AND MONITORING ITEMS
(1) The following table shows LED blinking patterns to be used for reporting causes in the case of safety shutdown.
(2) Since the TV set is provided with many failure items, causes of shutdown can be identified by the following blinking patterns.
LED blinking times
Item
Abbreviation
Description
Detection location
2
Abnormal inner temperature
Panel TEMP ERR
Panel module overheating detected.
Communication between LM75 and I2C
3
+B power OVP
+B_OVP
6.5V (inverter power) overvoltage detected.
Unregulated 6.5V line
4
Fan error
FAN_ERR
Malfunction of any fan detected
Return voltage from fan (L/H detected by the circuit)
6
Low B power error
LowB_ERR
Power low of main power supply (for set’s load) detected.
10.5V line
7
Speaker protection
Audio_Prot
Amplifier output error (short-circuit, no power supply to K board) detected.
K board
8
Digital power OVP
D_OVP
Overvoltage for T-CON detected.
Panel 5V
9
Backlight error
B_LIGHT _ERR
Inverter error detected.
Panel module (inverter with power supply)

DISPLAYING SERVICE MENU
(1) Turn ON the power of the TV set, and drive it into the standby mode by the remote control.
(2) Press the buttons on the remote control as follows.
DISPLAY >  TEN KEY “5” >  VOL “+” >  TV POWER
ADJUSTMENT USING THE SERVICE MENU
Set adjustment values using the”LEFT/RIGHT/UP/DOWN ” keys and the “ ENTER” key.
SELF CHECK MENU
For errors eith symptoms such as “power sometimes shuts off” or “screen sometimes goes out” that cannot be confirmed, it is possible to bring up past occurances of failure for confirmation on the screen:
To bring up screen test
In stand by mode, press buttons on the remote commander sequentially in repid succession as shown below:
DISPLAY >  TEN KEY “5” > VOL“-” > TV power >  Note that this differs from entering the service mode(mode volume “+”)
Gamma Adjustment
1. Send ECS_ADJUST_LEVEL_SETTING_INIT command.
2. Ensure COL_MATRIX_INDEX=15.
3. Ensure hreg p1_d_p_26=0 and hreg p1_d_p_28=0.
4. Ensure G_GAMMA_IDX_OFST=15.
5. Ensure DYNAMIC_EN=0.
Set up Trident internal SG and brightness measurement
1. Ensure TEST_PATTEN_ON=1.
2. Ensure TEST_G_LEVEL=204.
3. Ensure TEST_R_LEVEL=0.
4. Ensure TEST_B_LEVEL=0.
5. Measure brightness A.
6. Ensure TEST_G_LEVEL=102.
7. Ensure TEST_R_LEVEL=0.
8. Ensure TEST_B_LEVEL=0.
9. Measure brightness B.
10. Set up G_GAMMA_OFST_01=brightness B/brightness
A*10000. The result is written to G_GAMMA_OFST_01.
11. Send Gamma_Tbl_Search_1 command.
12. Ensure TEST_G_LEVEL=153.
13. Ensure TEST_R_LEVEL=0.
14. Ensure TEST_B_LEVEL=0.
15. Measure brightness C.
16. Set up G_GAMMA_OFST_02=brightness C/brightness
A*10000. The result is written to G_GAMMA_OFST_02.
17. Send Gamma_Tbl_Search_2 command.
18. Save set up value in NVM in register G_GAM_IDX_OFST.
* Incase of 26V need reduce 2 from original data.
White Balance Adjustment
Set up mode for White Balance Adjustment
1. Send ECS_ADJUST_LEVEL_SETTING_INIT command.
2. Ensure COL_MATRIX_INDEX=15.
3. Ensure hreg p1_d_p_26=0 and hreg p1_d_p_28=0.
4. Ensure DYNAMIC_EN=0.
White Balance of colour temperature "High"
1. Set up COLOR_TEMP=0.
2. Set up GAMMA_OFF=15.
3. R_GAMMA_OFST_01=128
R_GAMMA_OFST_02=128
R_GAMMA_OFST_03=128
R_GAMMA_OFST_04=128
B_GAMMA_OFST_01=128
B_GAMMA_OFST_02=128
B_GAMMA_OFST_03=128
Set up B_GAMMA_OFST_04=128.
4. Set up ìWaitî.
5. Set up the correct values for 20IRE for TEST_R_LEVEL, TEST_G_LEVEL and TEST_B_LEVEL.
6. Adjust R_GAMMA_OFST_01 and B_GAMMA_OFST_01 chroma values so that they are within tolerance
7. Set up the correct values for 40IRE for TEST_R_LEVEL, TEST_G_LEVEL and TEST_B_LEVEL
8. Adjust R_GAMMA_OFST_02 and B_GAMMA_OFST_02 chroma values so that they are within tolerance
9. Set up the correct values for 60IRE for TEST_R_LEVEL, TEST_G_LEVEL and TEST_B_LEVEL
10. Adjust R_GAMMA_OFST_03 and B_GAMMA_OFST_03 chroma values so that they are within tolerance in the table below.
11. Set up the correct values for 80IRE for TEST_R_LEVEL, TEST_G_LEVEL and TEST_B_LEVEL.
12. Adjust R_GAMMA_OFST_04 and B_GAMMA_OFST_04 chroma values so that they are within tolerance
13. Write R_GAMMA_OFST_01~R_GAMMA_OFST_04 and B_GAMMA_OFST_01~B_GAMMA_OFST_04 in the NVM.
14. Write R_GAMMA_OFST_04~R_GAMMA_OFST_05 and B_GAMMA_OFST_04~B_GAMMA_OFST_05 in the NVM.
15. Set up TEST_PATTEN_ON=0.
16. Set up COL_MATRIX_INDEX=30.
17. Set up hreg_p1_d_p_26=3.
18. Set up hreg_p1_d_p_28=3.
19. Set up DYNAMIC_EN=0xffff
20. Set up COLOR_TEMP=1.
21. Write the correct values for R_DRV, B_DRV, R_BKG and B_BKG
22. Send ECS COLOR_SAVE command.
23. Set up COLOR_TEMP=2.
24. Write the correct values for R_DRV, B_DRV, R_BKG and B_BKG
25. Send ECS COLOR_SAVE command.
26. Set up COLOR_TEMP=3.
27. Write the correct values for R_DRV, B_DRV, R_BKG and B_BKG
28. Send ECS COLOR_SAVE command.
29. Switch the TV set OFF and then ON again to retain adjustment
values.