SONY KF-42WE610 SERVICE MODE AND POWER SUPPLY CIRCUIT

SONY KF-42WE610 SERVICE MODE AND POWER SUPPLY CIRCUIT

SONY KF-42WE610 

SERVICE MODE AND POWER SUPPLY CIRCUIT

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 > Vol -  >POWER

Self-Diagnosis function operation
- 3 : Lamp cover When lamp cover SW is opened then pin 3 of CN8014 on the A board is high, LCD Engine u-com (pin 27 of IC3208 on the C2 board) detects it and make turn off the lamp.
- 4 : Fan When Fan1 or Fan2 or Fan3 is stopped then pin 2 or 5 or 8 of CN8022 on the A board is high, LCD Engine u-com (pin 24 of IC3208 on the C2 board) detects it and make turn off the lamp.
- 4 : Temp When a temperature sensor on the H3 board detects a high temperature or IIC-E line connector (CN8023:A board,CN44:H3 board) is not attached securely, LCD Engine u-com IIC-E line detects it and make turn off the lamp.
- 5 : Lamp driver When lamp is not turned on then pin 29 of LCD Engine u-com (IC3208 on the C2 board) is high, checks pin 28 of LCD Engine u-com. If pin 28 is low, it is judged no high voltage.
- 6 : +B OVP When +17V line drop then pin 53 of MAIN u-com (IC3405 on the C2 board) is low, it turns off the main power.
- 7 : Audio When DC is appeared by audio amp failure at speaker line. Then it is detected by MAIN u-com (pin 59 of IC3405 on the C2 board) and it turns off the main power.
- 8 : D-OVP When +3.3V or +2.5V or +1.8V line over then pin 49 of MAIN u-com (IC3405 on the C2 board) is low, it turns off the main power.
- LAMP : Lamp When lamp is not turned on then pin 29 of LCD Engine u-com (IC3208 on the C2 board) is high, checks pin 28 of LCD Engine u-com. If pin 28 is high, it is judged lamp is burned out.

Method of Setting the Service Adjustment Mode
1. Standby mode. (Power off)

2. DISPLAY > 5 > VOL (+)  >TV POWER

on the remote commander. (Press each button within a second.)The following service screen will appear.

Service Mode Adjustment
1. The SCREEN displays the item being adjusted.
2. Press “1” or “4” on the remote commander to select the adjustment item.
3. Press “3” or “6” on the remote commander to change the data.
4. Press “2” or “5” on the remote commander to select the category. Every time you press “2” (Category up), Service mode changes

5. If you want to recover the latest values press “-” then “[ENTER]” to read the memory.
6. Press “[MUTING]” then “[ENTER]” to write into memory.
7. Turn power off.
Note: Press “8” then “[ENTER]” on the remote commander to set the shipping conditions or turn set off and on to exit.

Memory Write Confirmation Method
1. After adjustment, turn power off with the remote commander.
2. Turn power on and set to service mode.
3. Call the adjusted items again and confirm they were adjusted.

FUNCTION OF KEYS ON COMMANDER
• 1 : Changes adjustment item. (item No. moves up)
• 4 : Changes adjustment item. (item No. moves down)
• 2 : Changes adjustment category. (category moves up)
• 5 : Changes adjustment category. (category moves down)
• 3 : Changes data value. (up)
• 6 : Changes data value. (down)

POWER SUPPLY CIRCUIT 

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