Thursday, October 15, 2015

TOSHIBA 42WP27B SERVICE MODE LED BLINKING AND POWER SUPPLY CIRCUIT

TOSHIBA 42WP27

SERVICE MODE LED BLINKING AND POWER SUPPLY CIRCUIT 

Adjustment Procedure
+B Set-up
Item / Preparation
1. Input a Grey scale signal.
2. Set the picture controls: -
Picture mode: Normal
White balance: Normal
Adjustments
Adjust and confirm indicated test point for the specified voltage.
Adjust
Vsus ---R540 ----170V ± ---- 1V ----P1 pin 3
Vda---- R537----- 67V ±----- 0.5V--- P12 pin 1
Confirm
15V ------------15.3V ± 0.5V ------P23 pin 2
13V ------------13.3V ± 0.5V ------P25 pin 5
15V------------ 15.2V ± 0.5V------- P25 pin 1
Audio 13V -----12.5V ± 0.8V ----P6 pin 1
Audio-13V -----12.5V ± 0.8V---- P6 pin 3
5V --------------5.2V ± 0.3V-------- P25 pin 7
STB 5V --------5.0V ± 0.3V ------P27 pin 4
Fan 15V -------15.0V ± 0.5V----- P10 pin 1
Fan 5V --------5.2V ± 0.3V------- P10 pin 4
PFC 380V-----± 15V -------C447(+)
Driver Set-up
Item / Preparation
1. Input an APL 100 % white signal.
2. Set the picture controls: -
Picture mode: Normal
White balance: Cool
Aspect: 16:9
Adjustments
Adjust driver section voltages referring the panel data on the panel data label
Name
Test Point
Voltage
Volume
Vsus
TPVSUS (SS)
170V ± 1V
R540 (P)
Vbk
TPVBK (SC)
155V ± 5V
R6443 (SC)
Ve
TPVE (SS)
150V ± 1V
R6774 (SS)
Vset
TPVSET (SC)
218V ± 6V
---
Vad
TPVAD (SC)
-90V ± 1V
R6477 (SC)
Vscn
TPVSCN (SC)
Vad*+118V ± 2V
---
Vda
TPVDA (SS)
67V ± 1V
R537 (P)

Service mode
CAT (computer Aided Test) mode
Press and hold the volume down button on the front panel of the unit and press the status button on the  remote control 3 times quickly with in 1 second. This will place the unit in to CAT mode .
 To exit the CAT mode, access the ID mode and switch off the main power.
IIC mode
Select the IIC mode by Up/Down button on the remote control at the front page of CAT mode then press the Action button on the remote control.
To exit the IIC mode, press the R button on the remote control.
CD mode
Select the CD mode by Up/Down button on the remote control at the front page of CAT mode then press the Mute button on the remote control more than 5 sec
To exit the CD mode, press the R button on the remote control.
SD mode
Select the SD mode by Up/Down button on the remote control at the front page of CAT mode then press the Action button on the remote control.
To exit the SD mode, press the R button on the remote control.
White balance adjustment
1) Find the nearest area to brightness of 10 cd/m2 as Low light by color sensor.
2) Adjust Sub bright to set Low light level to 10 cd/m2 exactly.
3) Set G cut off to " 80 ".
4) Adjust B and R cut off to set color temperature.
5) If Sub Bright is changed re-adjust it to set Low light to 10 cd/m2.
6)Find 75% of white area by color sensor.
7) Set G Drive to " E8 ".
8) Adjust B and R Drive to set color temperature.
9) Repeat item 4) to 7) to set both Low light and high light.
10) Increase same steps of R, G and B Drive to set largest level of 3 color drive to "FC".
11) Re-adjust Low light level again.
Sub brightness setting
1) Set white balance to Cool.
2) Adjust All cut off to start some pixels emission at black 2% area and no emission at black 0% area.
3) Write down all cut off data.
4) Set white balance to Nornal.
5) Adjust All cut off to set same data of Cool mode.
6) Set white balance to warm.
7) Adjust All cut off to set same data of Cool mode.
Self Check
1. Self-check is used to automatically check the bus line controlled circuit of the Plasma display.
2. To get into the Self-check mode, press the volume down button on the customer controls at the front of the set, at the same time pressing the OFF-TIMER button on the remote control, and the screen will show.
If the CCU ports have been checked and found to be incorrect Or not located then " - - " will appear in place of " OK
Power LED Blinking timing chart
1. Subject
Information of LED Flashing timing chart.
2. Contents
When an abnormality has occurred the unit, the protection circuit operates and reset to the stand by mode. At this time, the
defective block can be identified by the number of blinkes of the Power LED on the front panel of the unit.
LED BLINKING
CHECK POINT
2
SC,SS,C BOARD
3
D BOARD
4
P BOARD (CHECK IC508 PROTECTION CIRCUIT
6

FAN CIRCUIT , FAN STOP CHECK PIN 3 OF P10 CONNECTOR

POWER SUPPLY CIRCUIT 

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