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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Wednesday, 13 March 2019

SHARP LC-32AX3H/M/X - LC-37AX3H/M/X - ADJUSTMENT PROCEDURE - INITIALIZATION - LAMP ERROR DETECTION

SHARP LC-32AX3H/M/X - LC-37AX3H/M/X - ADJUSTMENT PROCEDURE - INITIALIZATION - LAMP ERROR DETECTION


ADJUSTMENTS
The adjustment values are set to their optimum at the factory before shipping. If by any chance a value should become improper or a readjustment is required due to part replacement, make an adjustment according to the following procedure.  Before adjustment, perform aging for approx. 60 minutes to stabilize the unit.
After replacement of any PWB and/or IC for repair, note the following.
When replacing the following units, be sure to prepare the new units loaded with updated software.
AV UNIT:
: DUNTKD513DE01 (LC-32AX3M) DUNTKD513DE04 (LC-37AX3M)
: DUNTKD513DE02 (LC-32AX3H) DUNTKD513DE05 (LC-37AX3H)
: DUNTKD513DE03 (LC-32AX3X) DUNTKD513DE06 (LC-37AX3X)
MAIN UNIT:
 : DUNTKD558FE01 (LC-32AX3M) DUNTKD558FE04 (LC-37AX3M)
: DUNTKD558FE02 (LC-32AX3H) DUNTKD558FE05 (LC-37AX3H)
: DUNTKD558FE03 (LC-32AX3X) DUNTKD558FE06 (LC-37AX3X)
PROGRAM RE-WRITING PROCEDURE
Described below is how to write new control software into the flash memory in the unit via the outside computer.
  • PC with parallel port (printer port)
  • Parallel cable (Straight type)
  • Jig PWB (PAL JiGUiF-001)
  • 20-pin cable (1 in the figure below)
  • Application software for the rewriting program (IAP Writer)
  1. Set the PC printer port to EPP or ECP from BIOS setting.
  2. (Settings are different depending on PCs; it is desirable that a skilled person performs this operation.)
  3. Install the application software for the rewriting program (IAP Writer) into the PC.
  4. Connect the PC and the jig PWB with the parallel cable.
  5. Rewrite the program
  1. Unplug the AC cord during power up.
  2. Connect the jig PWB and the AV PWB with the cable (20-pin).  (Connect P5601 of the jig PWB and FD of the AV PWB.)
  3. Start the application software for the REWRITING program (IAP Writer). (If start-up is impossible, recheck the procedure.)
  4. While holding down the "SYSTEM RESET" button, plug in the AC cord to turn on the power.  * LED on the jig PWB lights up.  *Jig PWB connection is automatically detected and the system is shifted to the program rewriting mode.
  5. The rewriting program (IAP Writer) on the PC dictates writing. (Writing conditions are indicated on the IAP Writer.)
  6. Wait until Step 5 is ended.
  7. When ended, exit the IAP Writer.
  8. Turn off the AC power of the unit. (Unplug the AC cord.)
  9. Remove the cable from the jig PWB and the AV PWB.
  10. Turn on the AC power of the unit to check for operation.  (If "TV/VIDEO" and "VOL (+)/(–)" are available, rewriting is completed.)
  11. Factory initialization (INDUSTRY INIT) is required after version update.
ENTERING AND EXITING ADJUSTMENT MODE
  • Before entering the adjustment process mode, press the "RESET" button or adjust the menu image to reset the AV position.
  • Unplug the AC power cord of the running TV to force off the power.
  • While holding down "VOL (–)" and "TV/VIDEO" keys at once, plug in the AC power cord to turn on TV. The letter K appears on the upper left of the screen.
  • Next, hold down the "VOL (–)" and "CH (▼)" keys at once. Multiple lines of blue characters appearing onscreen indicate that the unit is now in the adjustment process mode. If you fail to enter this mode (the display is the same as normal start-up), retry the procedure.
  • To exit the adjustment process mode after adjustment is completed, unplug the AC cord to force off the power.  (When the power is turned off with the remote control, once plug the AC cord and after approx. 10 seconds plug it in again.)
Caution: Use due care in handling the information described here lest the users should know how to enter the adjustment process mode. If the setting is tampered with in this mode, unrecoverable system damage may result.
Remote controller key operation and description of display in adjustment process mode
  • CH “▲/▼” à Moving an item (line) by one (UP/DOWN)
  • VOL (+/–) à Changing a selected item setting (+1/–1)
  • Cursor (“▲/▼” / “◄/►”) à UP/DOWN: PAGE BACK/NEXT:  LEFT/RIGHT: Changing data (every ten)
  • TV/VIDEO à Input source switching (toggle switching) (TUNER à INPUT1 à INPUT2 à INPUT3 à INPUT4)
  • CH UP/DOWN (Main unit & R/C) à Moving items: BACK/NEXT
  • Enter Key à Executing a function
** Input mode is switched automatically when relevant adjustment is started so far as the necessary input signal is available.
Description of display
INITIALIZATION TO FACTORY SETTINGS
Caution: In the factory settings, all user setting data including the channel settings are initialized.  (The adjustments made in the adjustment process mode are not initialized.) Keep this in mind when initializing these settings.
After adjustment, exit the adjustment process mode as follows:
Unplug the AC power cord from the outlet to force off the power. (When the power is turned off with the remote control, once unplug the AC power cord and after 10 seconds plug it in again.)
Factory settings.
Adjustment conditions à Turn off the AC power to exit the adjustment process mode.
Adjustment procedure à Use the "VOL(+)"/ [R/C] key on Page 2 to turn "ON" INDUSTRY INIT and then press "OK" [R/C] key.  "////////" appears and then "SUCCESS" appears if the setting is completed.
The followings are initialized to factory settings.
  • Use settings
  • Channel data (e.g. broadcast frequencies)
  • Manufacturer’s option settings
  • Password data.
LAMP ERROR DETECTION
  • This LCD color TV set incorporates the lamp error detection feature that automatically turns off the power for safety. If the lamp or the lamp circuit is defective or if the lamp error detection is activated for some reason, the following will result.
  • The power is interrupted in approx. 6 seconds after turned on.(The power LED on the front of the TV set turns from green to red and keeps blinking in red: ON for 250ms; OFF for 1 sec)
  • If the phenomenon mentioned in 1 above occurs five consecutive times, the power cannot be turned on.(The LED keeps blinking in red: ON for 250ms; OFF for 1 sec)
Measures
Checking with lamp error detection OFF
Enter the display process, referring to "3. Entering and exiting the display process mode". If the lamp or the lamp circuit is defective, the lamp will go out. (The power LED is green.).  Thus abnormalities can be checked.
Resetting the lamp error circuit
  • After checking for abnormality in the lamp or the lamp circuit, reset the lamp error count. If the lamp error is detected five consecutive times, the power cannot be turned on. Use the "CH “▲/▼” key to move to [LAMP ERROR RESET], (Line 6) on the display process mode service page. Then use the "cursor“◄/►” key to select the [LAMP ERROR RESET] value. Finally press the "cursor“▲/▼”  key to reset the value to "0"
Posted By: FRANK at 08:23
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