SONY KDS-70R2000 SERVICE MODE LED BLINK AND POWER SUPPLY CIRCUIT
SONY KDS-70R2000
LCD TV
SERVICE MODE ,LED BLINK AND POWER SUPPLY CIRCUIT
Self Diagnostic
SP-3 chassis TV’s contain a self diagnosis
function. In the event of an error occurring, the STANDBY LED indicator will
automatically begin to flash. The number of times the STANDBY LED indicator
flashes translates to a probable source of the problem. 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 indicator will flash a set number of times to indicate the possible cause of the problem. If there is more than one error, the indicator will identify the first of the problem areas. If the errors occur simultaneously, the item with the lower flash count will be shown. The result for all of the following diagnosis items are displayed on screen. No error has occured if the screen displays a “0”.
When an error occurs, the STANDBY indicator will flash a set number of times to indicate the possible cause of the problem. If there is more than one error, the indicator will identify the first of the problem areas. If the errors occur simultaneously, the item with the lower flash count will be shown. The result for all of the following diagnosis items are displayed on screen. No error has occured if the screen displays a “0”.
Error Message
|
LED Code
|
Probable Cause Location
|
Symptom
|
Temp Error
|
02
|
- Set temperature is high
- Temp sensor connector is not attached securely. |
- No picture/No sound
|
Lamp Cover Error
|
03
|
- Lamp cover is not
attached securely. - Lamp is not set securely. |
- No picture/No sound
|
Fan Stopped
|
04
|
- Fan has no power.
- Fan connector is not attached securely. |
- No picture/No sound
|
Lamp Driver Error
|
05
|
- d Lamp driver is faulty
|
- No picture/No sound
|
Power Error
|
06
|
- d D5V is missing
|
- No picture/No sound
|
Audio Prot
|
07
|
- d Short circuit of Audio line
|
- No picture/No sound
|
Power OVP
|
08
|
- d 7V is overvoltage
|
- No picture/No sound
|
Device Error
|
09
|
- Temperature sensors,
Bus decoder IC's IC6402 |
- No picture
- No picture/No sound |
Lamp Error
|
- Lamp for light source
burns out. |
STOPPING THE STANDBY INDICATOR
FLASH
Turn off the power switch on the TV to stop the STANDBY indicator from flashing.
Turn off the power switch on the TV to stop the STANDBY indicator from flashing.
SELF-DIAGNOSTIC SCREEN DISPLAY
For errors with symptoms such as “power sometimes shuts off” or “screen sometimes goes off” that cannot be confirmed, it is possible to bring up past occurrences of failure on the screen for confirmation.
For errors with symptoms such as “power sometimes shuts off” or “screen sometimes goes off” that cannot be confirmed, it is possible to bring up past occurrences of failure on the screen for confirmation.
To bring up the screen test
In standby mode, press buttons on the remote commander sequentially in rapid sucession as shown below:
In standby mode, press buttons on the remote commander sequentially in rapid sucession as shown below:
INFORMATION (i) > 5 > VOLUME - >TV
- The results display is not automatically
cleared. In case of repair and after repair, 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 error after completing repair.
- If the results display is not returned to “0” it will not be possible to judge a new error after completing repair.
Method of Clearing Results Display
1. Power off ( Set to standby mode )
1. Power off ( Set to standby mode )
DISPLAY -> Channel 5 -> Vol - >
POWER
SELF-DIAGNOSIS FUNCTION OPERATION
2 : Temp over > When the inside temperature
sensed with IC3150, IC3200 and IC2000 mounted on the S1 board, S2 board and C
board respectively exceed the threshold, DEM (Display Engin u-com) detcts it
and turns off the lamp.
3 : Lamp cover > When the lamp cover is opened or the harness from the T board is off, DEM detects it and turns off the lamp.
4 : FAN error > When any FAN stops or the harness is not connected correctly, DEM detects it and turns off the lamp.
5 : Lamp driver > When the ballast is not working with high voltage, DEM detects it and turns off the lamp.
6 : Power error When the 5V regulated from the 11V is low, TVM (TV u-com) detects it and turns off the lamp.
7 : Audio > When DC appears on the speaker line because of audio amp failure, DEM detects it and turns off the lamp.
8 : Power-OVP > When the output voltage from the 7V line is abnormally high, TVM detects it and turns off the lamp.
9 : Device error > When the temperature sensor and bus decoder IC’s do not return ACK on IIC bus to DEM, DEM detects it and turns off the lamp. LAMP : Lamp When the lamp is broken, DEM detects it.
3 : Lamp cover > When the lamp cover is opened or the harness from the T board is off, DEM detects it and turns off the lamp.
4 : FAN error > When any FAN stops or the harness is not connected correctly, DEM detects it and turns off the lamp.
5 : Lamp driver > When the ballast is not working with high voltage, DEM detects it and turns off the lamp.
6 : Power error When the 5V regulated from the 11V is low, TVM (TV u-com) detects it and turns off the lamp.
7 : Audio > When DC appears on the speaker line because of audio amp failure, DEM detects it and turns off the lamp.
8 : Power-OVP > When the output voltage from the 7V line is abnormally high, TVM detects it and turns off the lamp.
9 : Device error > When the temperature sensor and bus decoder IC’s do not return ACK on IIC bus to DEM, DEM detects it and turns off the lamp. LAMP : Lamp When the lamp is broken, DEM detects it.
Method of Setting the Service
Adjustment Mode
1. Turn on the power to the TV set and enter
into the stand-by mode.
2. Press the following sequence of buttons on the Remote Commander.
2. Press the following sequence of buttons on the Remote Commander.
INFORMATION (i) > 5 > VOLUME + >TV
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.
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.
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.
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.
TEST RESET
The user settings can be reset to the factory
default condition as follows.
1. Press “TEST “ and “RESET “ key in sequence when the set is ON. The LAMP,TIMER and POWER LED light and the picture is muted. After about 5 seconds the LAMP and TIMER LED go off, and the color of POWER LED changes from amber to green.
After another 10 seconds the reset is completed and the initial set-up display appears.
1. Press “TEST “ and “RESET “ key in sequence when the set is ON. The LAMP,TIMER and POWER LED light and the picture is muted. After about 5 seconds the LAMP and TIMER LED go off, and the color of POWER LED changes from amber to green.
After another 10 seconds the reset is completed and the initial set-up display appears.
POWER SUPPLY CIRCUIT
