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 !

Thursday 7 March 2019

SHARP 27R-FS1 SERVICE MODE AND ADJUSTMENTS

SHARP 27R-FS1 SERVICE MODE AND ADJUSTMENTS

SHARP 27R-FS1

Service Mode
Before putting unit into the service mode, check that customer adjustments are in the normal mode. Use the reset function in the video adjustment menu to ensure customer controls are in their proper (reset) position.
Service Number Selection
Once in the service mode, press the Ch-up or Chdown button on the remote controller or at the set. The service adjustment number will vary in increments of one, from "D01" to "OP05". Select the item you wish to adjust.
Data Number Selection
Press the Vol-up or down button to adjust the data number.
To enter the service mode and exit service mode.
While pressing the Vol-up and Ch-up buttons at the sametime, plug the AC cord into a wall socket. Now the TV set is switched on and enters the service mode.
To exit the service mode, turn the television off by pressing the power button.
SERVICE ADJUSTMENT
Screen Adjustment
1. Receive a good local channel.
2. Enter the service mode and select the service No. "V03" and set the data value to "00" to set the color level to minimum. (Record original data code under No. "V03" before changing) You may skip this step, if you selected a B/W picture or monoscope pattern.
3. Select the service No. "V10" and adjust the data value to "01", this turn off the luminance signal (Y-mute).
4. Select the service No. "V04" and adjust data value to "51".
5. Adjust the master screen control until the raster darkens to the point where raster is barely seen.
6. Adjust the service numbers "V05" red, "V06" green and "V07" blue to obtain a good grey scale with normal whites at low brightness level.
7. Select the service No. "V10" and reset data to "00". Select the service No. "V03" and reset data to obtain normal color level.
8. Reset the master screen control to obtain normal brightness range.
White Balance Adjustment
1. Receive a good local channel.
2. Enter the service mode and select the service No. "V03" and set to "00" (minimum color)(Record original data code under adjustment "V03" before changing). "V03" does not have to be adjusted, if you selected a B/W picture or monoscope pattern.
3. Alternately adjust the service numbers "V08" and "V09" until a good grey scale with normal whites is obtained.
4. Select the service No. "V03" and adjust data to obtain normal color level.
Sub-Picture Adjustment
1. Receive a good local channel.
2. Make sure the customer picture control is set to maximum.
3. Enter the service mode and select the service No. "V01".
4. Adjust the data value to achieve normal contrast range.
Sub-Tint Adjustment
1. Receive a good local channel.
2. Set customer tint control to center of it's range.
3. Enter the service mode and select the service No. "V02".
4. Adjust "V02" data value to obtain normal flesh tones.
Video-Tint Adjustment
1. Enter the service mode and select the service No. "V15".
2. Adjust "V15" data value to "V02" data value.
Sub-Color Adjustment
1. Receive a good local channel.
2. Make sure the customer color control is set to center position .
3. Enter the service mode and select the service No. "V03".
4. Adjust "V03" data value to obtain normal color level.
Sub-Brightness Adjustment
1. Receive a good local channel.
2. Make sure the customer brightness control is set to center position.
3. Enter the service mode and select the service No. "V04".
4. Adjust "V04" data value to obtain normal brightness level.
Vertical Linearity Adjustment
1. Receive a good CATV channel.
2. Set to standard setting mode.
3. Enter the service mode and select the service No. "D02".
4. While observing the top and bottom of the screen, adjust "D02" data value to proper vertical linearity.
Vertical Phase Adjustment
1. Enter the service mode and select the service No. "D08".
2. Adjust data value to "00".
Note: This must be set "00" when changed data retrace line will appear.
Vertical-Size Adjustment
1. Receive a good local channel.
2. Enter the service mode and select the service No. "D01".
3. While observing the top and bottom of the screen, adjust "D01" data value to proper vertical size.
Side Pincushion Adjustment
1. Receive a good CATV channel or crosshatch pattern signal.
2. Set to standard setting mode.
3. Enter the service mode and select the service No. "D05".
4. Adjust the data of service No. "D05" so that the outermost line on the screen be straight.
Horizontal Position Adjustment
1. Receive a good CATV channel or crosshatch pattern signal.
2. Set to standard setting mode.
3. Enter the service mode and select the service No. "D09".
4. Adjust so that the left and right overscans are equal to each other.
Horizontal Size Adjustment
1. Receive a good CATV channel or crosshatch pattern signal.
2. Set to standard setting mode.
3. Enter the service mode and select the service No. "D04".
4. Vary the data of service No. "D04" to obtain the best horizontal size.
Trapezoidal Distortion Adjustment
1. Receive a good CATV channel or crosshatch pattern signal.
2. Set to standard setting mode.
3. Enter the service mode and select the service No. "D07".
4. Adjust so that the leftmost and rightmost vertical lines are parallel to each other.
Corner Distortion Adjustment
1. Receive a good CATV channel or crosshatch pattern signal.
2. Set to standard setting mode.
3. Enter the service mode and select the service No. "D06".
4. Adjust so that the vertical lines should be straight. Caption Position Adjustment (Horizontal)
1. Receive a good local channel.
2. Enter the service mode and select the service No. "D15".
3. A black text box appears on the screen.
4. Adjust "D15" data value so that text box is positioned in the center of the screen.
Sharpness Adjustment
1. Receive a good local channel.
2. Enter the service mode and select the service No. "V11".
3. Adjust data value to "55" (center of data range).
MTS Level Adjustment
1. Feed the following monaural signal to pin (14) of IC3001. Monaural signal : 300Hz, 245mVrms
2. Connect the rms voltmeter to pin (39) of IC3001.
3. Enter the service mode and select the service No. "M01".
4. Adjust the data so that the rms voltmeter reads. Spec : 490 ±10mVrms.
MTS VCO Adjustment
1. Keep the unit in no-signal state.
2. Connect the frequency counter to pin (39) of IC3001.
3. Connect a capacitor (100µF, 50V) in between positive(+) side of C3005 and ground.
4. Enter the service mode and select the service No. "M02"
5. Adjust the data so that the frequency counter reads. Spec : 62.94 ±0.75kHz.
Filter Adjustment
1. Feed the following stereo pilot signal to pin (14) of IC3001 .
Stereo pilot signal: 9.4kHz, 600mVrms.
2. Enter the service mode and select the service No. "M03".
3. Adjust the data until "OK" appears in position on the screen. Make sure the "OK" is displayed almost at the center of the data range.
Separation Adjustment
1. Connect the rms voltmeter to pin (39) of IC3001.
2. Receive the following composite stereo signal 1. Composite stereo signal: 30% modulation, left channel only, noise reduction on, 300Hz
3. Enter the service mode and select the service No. "M04".
4. Adjust the data until the AC voltage reading of the rms voltmeter is minimum. 5. Receive the following composite stereo signal 2.
Stereo signal: 30% modulation, left channel only, noise reduction on, 3kHz
6. Enter the service mode and select the service No. "M05".
7. Adjust the data until the AC voltage reading of the rms voltmeter is minimum.
8. Take the above steps 1 thru 7 again for fine adjustment.
Posted By: FRANK at 03:43
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