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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Monday 25 March 2019

PANASONIC TC-29P10N - TC-33P10N - HOW TO ENTER SERVICE MODE - HOW TO ENTER SELF CHECK MODE - ADJUSTMENTS - ERROR CODES DISPLAY

PANASONIC TC-29P10N - TC-33P10N - HOW TO ENTER SERVICE MODE - HOW TO ENTER SELF CHECK MODE - ADJUSTMENTS - ERROR CODES DISPLAY



TO ENTER SERVICE MODE
  • Press the button [VOL -] inside the door of the main unit while pressing the button [Recall ] on the remote control transmitter three times in a row (within 2 seconds).
  • Switch off the power with the [POWER] button on the main unit or the [POWER] button on the remote control to EXIT service mode.
After entering service adjustment mode, perform adjustment after making notes of the values for each item. The written values (data) differ according to the set. Using the notes value as a reference facilities adjustment.
The item OPT adjusmtment,  in the contents for service adjustment mode is for adjustment at the plant.  Stay away form this item, at it means adjustment of all items.
  • Button (1)  for selection in forward direction.
  • Button (2) for selection in reverse direction.
  • When R, G, B-CUT, BRT, or S-BRT is selected, the screen becomes one horizontal line when button (5) on the remote control is pressed.  Even when BRT is adjusted, the value will not be memorized.
  • After entering service adjustment mode, perform adjustment after making notes of the values for each item.
  • The written values (data) differ according to the set.  Using the noted values as a reference facilitates the adjustment.
  • The item [OPT ] (OPT adjustment) in the contents for service adjustment mode is for adjustment at the plant.  Stay away from this item, as it means adjustment of all items.
  • When H-key (vertical pin keystone distortion) is adjusted, the vertical position changes, and V-POS (vertical position) must be adjusted.  However, when the vertical position is raised too much, the on-screen display no longer can be seen.
  • The item [OPT ] (OPT adjustment) in the contents for service adjustment mode is for adjustment at the plant.  Stay away from this item, as it means adjustment of all items.
  • After entering service adjustment mode, perform adjustment after making notes of the values for each item. The written values (data) differ according to the set. Using the noted values as a reference facilitates the adjustment.
VERTICAL POSITION ADJUSTMENT
  1. Set the item [H-V ] (H-V adjustment) (omitted in the following) to [V-HET].
  2. Adjust with the remote control buttons [VOL +/-] to a narrower vertical amplitude and confirm the vertical center of the image (crosshatch pattern).
  3. Set to the item [V-POS].
  4. Adjust with the remote control buttons [VOL +/-] so that the vertical center of the crosshatch pattern comes to the center of the screen.
VERTICAL AMPLITUDE [HEIGHT] ADJUSTMENT
  • Set to the item [V-HET], set to "3F", and adjust by turning R464 so that the number of horizontal lines of the crosshatch pattern becomes 5.5 lines at the top and at the bottom.
  • For adjustment of V-HET, keep "3F" fixed and adjust by turning R464. However, when adjustment of the vertical amplitude with R464 is not possible, adjust the value for [V-HET] in the range from 3A to 44 (hexadecimal).
VERTICAL LINEARITY ADJUSTMENT
  • Set to the item [V-LIN].
  • Adjust with the remote control buttons [VOL +/-] so that the interval between the lines of the upper half and the lower half of the crosshatch pattern becomes uniform.
VERTICAL 'S' SHAPE COMPENSATION ADJUSTMENT
  • Set to the item [V-SCR].
  • Adjust with the remote control buttons [VOL +/-] so that the grid size of the crosshatch pattern becomes the same at the center and at the top and the bottom.
  • Perform the adjustments 6. to 9. Alternately until the line interval between the straight lines becomes uniform.
HORIZONTAL POSITION ADJUSTMENT
  1. Set to the item [H-WID], narrow the horizontal amplitude with the remote control buttons [VOL +/-], and confirm the horizontal center.
  2. Set to the item [H-POS].
  3. Adjust with remote control buttons [VOL +/-] so that the horizontal center of the crosshatch pattern comes to the center of the screen.
HORIZONTAL AMPLITUDE [WIDTH] ADJUSTMENT
  1. Return to the item [H-WID].
  2. Adjust with the remote control buttons [VOL +/-] so that the number of vertical lines of the crosshatch pattern on the left and on the right becomes 7.2 lines each.
HORIZONTAL LINEARITY CONFIRMATION
  • Confirm that the horizontal linearity is not unbalanced.  If it is unbalanced, switch S551 (H. CENT) and set to the best position.
  • When the right side of the screen is shrunk, set S551 to the side of the terminal board, and when the left side of the screen is shrunk, set S551 to the side of the fly back transformer.
  • When the balance is not too bad, leave S551 at the center.
  • When S551 is not set at the center, perform horizontal position adjustment for 4:3 mode and for 16:9 mode.
SELF CHECK FUNCTION
When phenomena like “the power fails from time to time” or “the video/audio fails from time to time” can not be confirmed at the time of servicing, the self-check function can be used to confirm the occurrence and to limit the scope for the defective circuits.  Also, when “the power fails from time to time”, display of the color bar on the screen can be used confirm the occurrence and to limit the scope for the defective circuits.
  • Display method and display position:  When display is desired.
Hold (OFF TIMER) on the remote control pressed and press [VOL - ] on the TV set.  (The reception screen switches to TV monitor.
  • To return to normal display
When one of the buttons for channel selection etc. is operated, the display returns to the normal screen.
ERROR CODES

Display symbol
Phenomenon, condition
Treatment method
H10
No output of video and audio.
Exchange the tuner (TNR001).
H21
Audio stop. Surround function not effective.
Inspect the main board [A] IC2401 (audio compensation).
H30
No video and audio. Surround function not effective.
Inspect the rear terminal switching board [H] IC3001.


H34
No video. No raster. Color stop. No color synchronization.
Wrong colors. Bad on-screen display. No horizontal/vertical
synchronization.

Inspect the digital core board [DG] IC6601.

H36
No video. Color stop. Wrong colors. Bad on-screen display.
No horizontal/vertical synchronization.

Inspect the video signal processing board [AG] IC301.


H55
The red bar is displayed momentarily and then the power is interrupted. The power signal lamp (red) flashes three times in intervals of 2.8 sec.
Detection of overcurrent (140V line), vertical output.
Detection of 25 V line overcurrent, 25V line.


H56
The yellow bar is displayed for 0.5 sec., and then the power
is interrupted. The power signal lamp (red) flashes twice in intervals of 3.3 sec.

“Power failure from time to time” because of the overcurrent (140V line), vertical output (+15V line).


H57
The green bar is displayed for 1 sec., and then the power is
interrupted. The power signal lamp (red) flashes once in
intervals of 3.8 sec.

“Power failure from time to time” because of the overcurrent (140V line), vertical output (+15V line).

H58
Abnormal power circuit. The power does not come up, and
it is switched off after a few seconds.

Inspect the main 5V line.
H90
The memory gets lost.
Exchange the main board [A] IC1114 (memory).
H91
One horizontal line is not obtained at the time of servicing

Inspect the main board [A] IC1201 (expansion DAC).



H99
“No video from time to time” because of causes in the
antenna~tuner~video circuit.
*This also may be displayed when the antenna plug is disconnected or when a channel without a signal is received.



Inspect the tuner~video circuit.
Posted By: FRANK at 01:44
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