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!

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All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Monday, 18 March 2019

HOW TO ENTER SERVICE MODE - PHILIPS - LC4.1E CHASSIS – [20”] LCD TVs

HOW TO ENTER SERVICE MODE - PHILIPS - LC4.1E CHASSIS – [20”] LCD TVs


SERVICE DEFAULT MODE [SDM]
  Service Default mode (SDM) and Service Alignment Mode (SAM) offers several features for the service technician, while the Customer Service Mode (CSM) is used for communication between the call center and the customer.  This chassis also offers the option of using ComPair, a hardware interface between a computer and the TV chassis. It offers the abilities of structured troubleshooting, error code reading, and software version readout for all chassis. Minimum requirements for Compair Pentium processor, a Windows OS, and a CD-ROM drive (see also paragraph "ComPair")
Purpose
To create a predefined setting for measurements to be made.
To override software protections.
To start the blinking LED procedure.
To inspect the error buffer.
To check the life timer.
Specifications
Tuning frequency: 475.25 MHz.
Color system: PAL-BG.
All picture settings at 50% (brightness, color contrast, hue).
Bass, treble and balance at 50 %; volume at 25 %.
All service-unfriendly modes (if present) are disabled. The service unfriendly modes are:
Timer / Sleep timer.
Child / parental lock.
Blue mute.
Hotel / hospital mode.
Auto shut off (when no “IDENT” video signal is received for 15 minutes).
Skipping of non-favorite presets / channels.
Auto-storage of personal presets.
Auto user menu time-out.
Auto Volume Leveling (AVL)
HOW TO ENTER SDM
  1. Press the following key sequence on the remote control transmitter: “062596” directly followed by the MENU button (do not allow the display to time out between entries while keying the sequence).
  2. Short "Service" jumpers on the small signal board during cold start and apply mains (see Figure "Service jumpers"). Then press the mains button (remove the short after startup).  Caution: Entering SDM by shorting "Service" jumpers will override the +5V-protection. Do this only for a short period. When doing this, the service-technician must know exactly what he is doing, as it could damage the television set.
  3. Or via ComPair.
After entering SDM, the following screen is visible, with SDM in the upper right corner of the screen to indicate that the television is in Service Default Mode.
How to Navigate
  • When you press the MENU button on the remote control, the set will switch on the normal user menu in the SDM mode.
  • On the TV, press and hold the VOLUME DOWN and press the CHANNEL DOWN for a few seconds, to switch from SDM to SAM and reverse.
How to Exit
  • Switch the set to STANDBY by pressing the mains button on the remote control transmitter or the television set.
  • If you turn the television set off by removing the mains (i.e., unplugging the television) without using the mains button, the television set will remain in SDM when mains is re-applied, and the error buffer is not cleared.
SERVICE ALIGNMENT MODE [SAM]
Purpose
To change option settings.
To display / clear the error code buffer.
To perform alignments.
Specifications
Operation hours counter (maximum five digits displayed).
Software version, Error codes, and Option settings display.
Error buffer clearing.
Option settings.
AKB switching.
Software alignments (Tuner, White Tone, Geometry & Audio).
NVM Editor.
ComPair Mode switching.
How to Enter
  1. Press the following key sequence on the remote control transmitter: “062596" directly followed by the OSD/STATUS button (do not allow the display to time out between entries while keying the sequence).
  2. Or via ComPair.
After entering SAM, the following screen is visible, with SAM in the upper right corner of the screen to indicate that the television is in Service Alignment Mode.
Menu Explanation
1. LLLLL.This represents the run timer. The run timer counts normal operation hours, but does not count standby hours.
2. AAABCD-X.Y.This is the software identification of the main microprocessor:
A = the project name (LC41).
B = the region: E= Europe, A= Asia Pacific, U= NAFTA,
L = LATAM.
C = the software diversity:
  • Europe:T= 1 page TXT, F= Full TXT, V= Voice control.
  • LATAM and NAFTA:N= Stereo non-dBx, S= Stereo dBx.
  • Asian Pacific:T= TXT, N= non-TXT, C= NTSC.
  • ALL regions:M= mono, D= DVD, Q= Mk2.
D = the language cluster number.
X = the main software version number (updated with a major change that is incompatible with previous versions).
Y = the sub software version number (updated with a minor change that is compatible with previous versions).
EEEEEE = the scaler sw cluster
F = the main sw version no.
GG = the sub-version no.
SAM àIndication of the Service Alignment Mode.
Error Buffer à Shows all errors detected since the last time the buffer was erased. Five errors possible.
Option Bytes à Used to set the option bytes. See “Options” in the Alignments section for a detailed description. Seven codes are possible.
Clear à Erases the contents of the error buffer. Select the CLEAR menu item and press the MENU RIGHT key -->  The content of the error buffer is cleared.
Options à Used to set the option bits. See “Options” in the Alignments section for a detailed description.
Tuner à Used to align the tuner. See “Tuner” in the Alignments section for a detailed description.
White Tone à Used to align the white tone. See “White Tone” in the Alignments section for a detailed description.
Audio à No audio alignment is necessary for this television set.
NVM Editor à Can be used to change the NVM data in the television set.
SC NVM Editor à  Can be used to edit Scaler NVM.
ComPair à Can be used to switch on the television to In System Programming (ISP) mode, for software uploading via ComPair.
Caution: When this mode is selected without ComPair connected, the TV will be blocked. Remove the AC power to reset the TV.
To Navigate
In SAM, select menu items with the MENU UP/DOWN keys on the remote control transmitter. The selected item will be highlighted. When not all menu items fit on the screen, use the MENU UP/DOWN keys to display the next / previous menu items.
With the MENU LEFT/RIGHT keys, it is possible to:
  • Activate the selected menu item.
  • Change the value of the selected menu item.
  • Activate the selected sub-menu.
In SAM, when you press the MENU button twice, the set will switch to the normal user menus (with the SAM mode still active in the background). To return to the SAM menu press the MENU or STATUS/EXIT button.
When you press the MENU key in while in a sub-menu, you will return to the previous menu.
To Store SAM settings
To store the settings changed in SAM mode, leave the top level SAM menu by using the POWER button on the remote control transmitter or the television set.
To Exit
Switch the set to STANDBY by pressing the mains button on the remote control transmitter or the television set.
If you turn the television set “off” by removing the mains (i.e., unplugging the television) without using the mains button, the television set will remain in SAM when mains is re-applied, and the error buffer is not cleared.
Posted By: FRANK at 03:19
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