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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..............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 !

Wednesday 11 December 2019

PHILIPS 24PHG4032 – LCD TV – HOW TO ENTER THE SERVICE MODE, SOFTWARE UPDATE, SMPS SCHEMATIC


TPM17.5L LA- Chassis, MTK5561 – Platform, 24PHG4032/77 – Model
Display resolution
640 x 480 - 60Hz
800 x 600 - 60Hz
1024 x 768 - 60Hz
1360 x 768 - 60Hz
Video formats
Resolution — Refresh rate
480i - 60Hz
 480p - 60Hz
 576i - 50Hz
 576p - 50Hz
 720p - 50Hz, 60Hz
 1080i - 50Hz, 60Hz
 1080p - 24Hz, 25Hz, 30Hz, 50Hz, 60Hz
Picture / Display
 Display type: - LED backlight HD
 Diagonal size: - 59.8 cm / 24 inches
 Aspect ratio: 16:9 (widescreen)
 Panel resolution: - 1360x768p @60Hz
 Picture enhancement: Digital Crystal Clear
 Picture Performance Index (PPI): 240
Service Modes
The Service Mode feature is split into following parts
Factory Mode
Customer Service Mode (CSM).
SAM and the Factory mode offer features, which can be used by the Service engineer to repair/align a TV set.
The CSM is a Service Mode that can be enabled by the consumer. The CSM displays diagnosis information, which the customer can forward to the dealer or call centre.
 In CSM mode, “CSM”, is displayed in the top right corner of the screen. The information provided in CSM and the purpose of CSM is to:
Increase the home repair hit rate.
Decrease the number of nuisance calls.
Solve customers’ problem without home visit.
Note: For the new model range, a new remote control (RC) is used with some renamed buttons. This has an impact on the activation of the Service modes. 
For instance the old “MENU” button is now called “HOME” (or is indicated by a “house” icon).
Factory mode
To perform extended alignments.
How to Activate the Factory mode
To activate the Factory mode, use the following method:
Press the following key sequence on the remote control transmitter: from the “menu/home” press “1999”, directly followed by the “Back/Return” button. Do not allow the display to time out between entries while keying the sequence.
After entering the Factory mode,  can see many items displayed, use the UP/DOWN keys to display the next/previous menu items
How to Exit the Factory mode
Use one of the following methods:
Select EXIT_FACTORY from the menu and press the “OK” button.
Note: When the TV is switched “off” by a power interrupt, or normal switch to “stand-by” while in the factory mode, the TV will show up in “normal operation mode” as soon as the power is supplied again. The error buffer will not be cleared.
Customer Service Mode (CSM)
The Customer Service Mode shows error codes and information on the TVs operation settings.The call centre can instruct the customer (by telephone) to enter CSM in order to identify the status of the set.This helps the call centre to diagnose problems and failures in the TV set before making a service call.
The CSM is a read-only mode; therefore, modifications are not possible in this mode.
Ignore “Service unfriendly modes”.
Line number for every line (to make CSM language independent).
Set the screen mode to full screen (all contents on screen is visible).
After leaving the Customer Service Mode, the original settings are restored.
Possibility to use “CH+” or “CH-” for channel surfing, or enter the specific channel number on the RC.
How to Activate CSM
To activate CSM, press the following key sequence on a standard remote control transmitter: “456987” (do not allow the display to time out between entries while keying the sequence). After entering the Customer Service Mode, the following items are displayed. use the Right/Left keys to display the next/previous menu items
Note: Activation of the CSM is only possible if there is no (user) menu on the screen.
How to Navigate
By means of the “CURSOR-DOWN/UP” knob (or the scroll wheel) on the RC-transmitter, can be navigated through the menus.
How to Exit CSM
To exit CSM, use one of the following methods.
Press the MENU/HOME button on the remote control transmitter.
Press the POWER button on the remote control transmitter.
Press the POWER button on the television set.
Software Upgrading
The following update is for .bin file.
1. Rename the file to “Usb_update.bin”
2. Prepare a USB memory.
3. Copy the software to USB flash disk(root directory).
4. Switch off the TV and Insert the USB memory stick that contains the software update files in one of the TV’s USB 2.0 ports.
5. Switch on the TV. The TV will detect the USB memory stick automatically.
6. When the TV software is updated, the TV will turn on again automatically. Remove the USB flash drive.
7. We can enter in CSM or Factory mode to check the current software version.
Check the SW version
1. After burning software, TV will restart.
2. Press “Menu+1999+back”, enter Factory mode to check if the software version is correct
Caution: Please make sure that software upgrade is finished before unplug the USB and AC power.
Power Supply Unit
 Philips LCD TV power supplies are a black box for Service. When defective, a new board must be ordered and the defective one must be returned, unless the main fuse of the board is broken. Always replace a defective fuse with one with the correct specifications. This part is available in the regular market.
Consult the Philips Service web portal for the order codes of the boards.
Important delta’s with the platform are:
New power architecture for LED backlight
“Boost”-signal is now a PWM-signal + continuous variable
The control signals are
 PS-ON
 Lamp “on/off”
 DIM (PWM) (not for PSDL)
No detailed information is available because of design protection issues.
 +12 output (on-mode)
 +12V_audio (audio AMP power)
 Output to the display; in case of
- IPB: High voltage to the LCD panel
- PSL and PSLS (LED-driver outputs)
- PSDL (high frequent) AC-current.
Diversity
The diversity in power supply units is mainly determined by the diversity in displays.
The following displays can be distinguished:
 CCFL/EEFL backlight: power panel is conventional IPB
 LED backlight:
- side-view LED without scanning: PSL power panel
- side-view LED with scanning: PSLS power panel
- direct-view LED without 2D-dimming: PSL power panel
- direct-view LED with 2D-dimming: PSDL power panel.
PSL stands for Power Supply with integrated LED-drivers.
PSLS stands for a Power Supply with integrated LED-drivers with added Scanning functionality (added microcontroller).
PSDL stands for a Power Supply for Direct-view LED backlight with 2D-dimming.
DC/DC Converters
The on-board DC/DC converters deliver the following voltages(depending on set execution):
 PVDD from the power 12V_AMP for the AUDIO AMP.
 3V3SB, permanent voltage for the Stand-by controller, LED/IR, keyborad receiver and controls.
 +12V, input from the power supply for the panel common(active mode)
 +12V, input from the power supply for the AMP
 DDRV supply voltage for DDR
 TUNER3.3V, supply voltage for tuner
 +5V_SW, input intermediate supply voltage for the USB Power
 3V3SB, from the power supply for the scaler IC MT5561
 DVDD3V3, +1V2,clean voltage for Demodulator IC channel decoder.
Posted By: FRANK at 07:49
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