REPAIRING AND NOT THROWING AWAY

REPAIRING AND NOT THROWING AWAY

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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Note that if you don't find what you searched for, try it after a period of time; the site is a never ending job !

..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

©2010, 2011, 2012, 2013, 2014 Frank Sharp - You do not have permission to copy photos and words from this blog, and any content may be never used it for auctions or commercial purposes, however feel free to post anything you see here with a courtesy link back, btw a link to the original post here , is mandatory.
All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Saturday 9 March 2019

TOSHIBA 42WP27B SERVICE MODE LED BLINKING AND POWER SUPPLY CIRCUIT

TOSHIBA 42WP27B SERVICE MODE LED BLINKING AND POWER SUPPLY CIRCUIT


TOSHIBA 42WP27B 

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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Posted By: FRANK at 06:37
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