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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Note that if you don't find what you searched for, try it after a period of time; the site is a never ending job !

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

Showing posts with label HCL. Show all posts
Showing posts with label HCL. Show all posts

Friday, 5 April 2019

HCL HCM9LWAT11 - 19 INCH LCD MONITOR – POWER SUPPLY SCHEMATIC [CIRCUIT DIAGRAM] - NO POWER - TROUBLESHOOTING

HCL HCM9LWAT11 - 19 INCH LCD MONITOR – POWER SUPPLY SCHEMATIC [Circuit Diagram] - No Power - Troubleshooting


SMPS SCHEMATIC
CLICK ON THE SCHEMATIC TO ZOOM IN
NO POWER [ TROUBLESHOOTING]
Posted By: FRANK at 02:04
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SAMSUNG _ HCL - HD4715W - PROJECTION TV - POWER SUPPLY SCHEMATIC

SAMSUNG _ HCL - HD4715W - PROJECTION TV - POWER SUPPLY SCHEMATIC


POWER SUPPLY SCHEMATIC
HORIZONTAL OUTPUT
VIDEO OUTPUT [CRT BASE CARDS]
CLICK ON THE SCHEMATICS TO MAGNIFY
Posted By: FRANK at 01:48
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Friday, 29 March 2019

HCL HCM9LWAT11 AND ACER CDB223PWL V223PWL SM20120424V0 – SMPS & BACK-LIGHT INVERTER BOARD CIRCUIT DIAGRAM - ZENER DIODE COLOR CODES

HCL HCM9LWAT11 and ACER CDB223PWL V223PWL SM20120424V0 – SMPS & Back-Light inverter board circuit diagram - Zener Diode Color Codes

Power and Back-light inverter board Schematics _ ACER_LCD_B223PWL and HCL HCM9LWAT11 _ Zener Diode Color codes.
Acer LCD B223 SMPS SCHEMATIC
Acer LCD B223 Converter Schematic
HCL HCM9LWAT11 SMPS Schematic
HCL HCM9LWAT11 Back-light Inverter Schematic
ZENER DIODE COLOR CODES
Most manufacturers stamp the ID right on the diode but some do use color banding as the method of identification. For purposes of alignment, the side with any color band closest to either side of the diode is the equivalent of the left side of this table. The three examples in the table when associated with the values in the lower table are identified as 1N64E for the top diode, 1N452G for the middle diode and 1N4762 for the bottom diode. 
Posted By: FRANK at 01:56
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Friday, 1 March 2019

HCL AND SAMSUNG 15 INCH LCD MONITOR – HOW TO ENTER THE SERVICE MODE – ADJUSTMENTS – POWER AND BACKLIGHT INVERTER SCHEMATIC

HCL and Samsung 15 Inch LCD monitor – How to enter the service mode – adjustments – Power and backlight inverter Schematic

HCL HCMDLWBT21 - HCMDLWBN21 - Samsung 15 inch monitor – Power (SMPS) and Back-light inverter – Circuit Diagram – Service Mode and adjustments
Service Mode
Press the MENU button, pull out the power cord, and then plug the power cord. Then the factory OSD will be at the left top of the panel.
White- Balance, Luminance Adjustment
Approximately 30 minutes should be allowed for warm up before proceeding white balance adjustment. Before started adjust white balance , please set the Chroma-7120 MEM Channel 3 to Warm (6500K) color, MEM Channel 4 to Normal (7300K) color, MEM Channel 9 to Cool (9300K) color , and MEM Channel 10 to sRGB color ( our Warm color parameter is x = 313 ±30, y = 329 ±30, Y>140cd/m2; Normal color parameter is x = 302 ±30, y = 318 ±30, Y>130cd/m2; Cool color parameter is x = 283 ±30, y = 297 ±30, Y>110cd/m2; sRGB color parameter is x = 313 ±30, y = 329 ±30, Y>140cd/m2).
How to setting MEM channel you can reference to chroma 7120 user guide or simple use “ SC” key and “ NEXT” Key to modify xyY value and use “ID” key to modify the TEXT description Following is the procedure to do white-balance adjust.
Setting the color temp. you want
A. MEM.CHANNEL 3 (Warm color):
Warm color temp. parameter is x = 313 ±30, y = 329 ±30, Y>140cd/m2
B. MEM.CHANNEL 4 (Normal color):
Normal color temp. parameter is x = 302 ±30, y = 318 ±30, Y>130cd/m2
C. MEM.CHANNEL 9 (Cool color):
Cool color temp. parameter is x = 283 ±30, y = 297 ±30, Y>110cd/m2
D. MEM.CHANNEL 10 (sRGB color):
sRGB color temp. parameter is x = 313 ±30, y = 329 ±30, Y>140cd/m2
Into Factory mode.
Press the MENU button, pull out the power cord, and then plug the power cord. Then the factory OSD will be at the left top of the panel.
Bias adjustment:
Set the Contrast to 50; Adjust the Brightness to 80.
Gain adjustment:
Move cursor to “-F-” and press MENU key.
A. Adjust Warm (6500K) color-temperature
1. Switch the chroma-7120 to RGB-Mode (with press “MODE” button)
2. Switch the MEM.channel to Channel 3 (with up or down arrow on chroma 7120)
3. The LCD-indicator on chroma 7120 will show x = 313 ±30, y = 329 ±30, Y>140cd/m2
4. Adjust the RED on factory window until chroma 7120 indicator reached the value R=100
5. Adjust the GREEN on factory window until chroma 7120 indicator reachedthe value G=100
6. Adjust the BLUE on factory window until chroma 7120 indicator reached the value B=100
7. Repeat above procedure (item 4, 5, 6) until chroma 7120 RGB value meet the tolerance =100±2
B. Adjust Normal (7300K) color-temperature
1. Switch the chroma-7120 to RGB-Mode (with press “MODE” button)
2. Switch the MEM.channel to Channel 4(with up or down arrow on chroma 7120)
3. The LCD-indicator on chroma 7120 will show x = 302 ±30, y = 318 ±30, Y>130cd/m2
4. Adjust the RED on factory window until chroma 7120 indicator reached the value R=100
5. Adjust the GREEN on factory window until chroma 7120 indicator reachedthe value G=100
6. Adjust the BLUE on factory window until chroma 7120 indicator reached the value B=100
7. Repeat above procedure (item 4, 5, 6) until chroma 7120 RGB value meet the tolerance =100±2
C. Adjust Cool (9300K) color-temperature
1. Switch the Chroma-7120 to RGB-Mode (with press “MODE” button)
2. Switch the MEM. Channel to Channel 9 (with up or down arrow on chroma 7120)
3. The LCD-indicator on chroma 7120 will show x = 283 ±30, y = 297 ±30, Y>110cd/m2
4. Adjust the RED on factory window until chroma 7120 indicator reached the value R=100
5. Adjust the GREEN on factory window until chroma 7120 indicator reached the value G=100
6. Adjust the BLUE on factory window until chroma 7120 indicator reached the value B=100
7. Repeat above procedure (item 4, 5, 6) until chroma 7120 RGB value meet the tolerance =100±2
D. Adjust sRGB color-temperature
1. Switch the chroma-7120 to RGB-Mode (with press “MODE” button)
2. Switch the MEM.channel to Channel 10 (with up or down arrow on chroma 7120)
3. The LCD-indicator on chroma 7120 will show x = 313 ±30, y = 329 ±30, Y>140cd/m2
4. Adjust the RED on factory window until chroma 7120 indicator reached the value R=100
5. Adjust the GREEN on factory window until chroma 7120 indicator reachedthe value G=100
6. Adjust the BLUE of on factory window until chroma 7120 indicator reached the value B=100
7. Repeat above procedure (item 4, 5, 6) until chroma 7120 RGB value meet the tolerance =100±2
E. Turn the Power-button off to quit from factory mode.
715G2852-2 SMPS board Circuit Diagram (Schematic) and PWB
Back Light inverter schematic
Click on the pictures to zoom in
Posted By: FRANK at 05:40
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Thursday, 7 February 2019

HCL AND SAMSUNG 15 INCH LCD MONITOR – HOW TO ENTER THE SERVICE MODE – ADJUSTMENTS – POWER AND BACKLIGHT INVERTER SCHEMATIC

HCL and Samsung 15 Inch LCD monitor – How to enter the service mode – adjustments – Power and backlight inverter Schematic

HCL HCMDLWBT21 - HCMDLWBN21 - Samsung 15 inch monitor – Power (SMPS) and Back-light inverter – Circuit Diagram – Service Mode and adjustments
Service Mode
Press the MENU button, pull out the power cord, and then plug the power cord. Then the factory OSD will be at the left top of the panel.
White- Balance, Luminance Adjustment
Approximately 30 minutes should be allowed for warm up before proceeding white balance adjustment. Before started adjust white balance , please set the Chroma-7120 MEM Channel 3 to Warm (6500K) color, MEM Channel 4 to Normal (7300K) color, MEM Channel 9 to Cool (9300K) color , and MEM Channel 10 to sRGB color ( our Warm color parameter is x = 313 ±30, y = 329 ±30, Y>140cd/m2; Normal color parameter is x = 302 ±30, y = 318 ±30, Y>130cd/m2; Cool color parameter is x = 283 ±30, y = 297 ±30, Y>110cd/m2; sRGB color parameter is x = 313 ±30, y = 329 ±30, Y>140cd/m2).
How to setting MEM channel you can reference to chroma 7120 user guide or simple use “ SC” key and “ NEXT” Key to modify xyY value and use “ID” key to modify the TEXT description Following is the procedure to do white-balance adjust.
Setting the color temp. you want
A. MEM.CHANNEL 3 (Warm color):
Warm color temp. parameter is x = 313 ±30, y = 329 ±30, Y>140cd/m2
B. MEM.CHANNEL 4 (Normal color):
Normal color temp. parameter is x = 302 ±30, y = 318 ±30, Y>130cd/m2
C. MEM.CHANNEL 9 (Cool color):
Cool color temp. parameter is x = 283 ±30, y = 297 ±30, Y>110cd/m2
D. MEM.CHANNEL 10 (sRGB color):
sRGB color temp. parameter is x = 313 ±30, y = 329 ±30, Y>140cd/m2
Into Factory mode.
Press the MENU button, pull out the power cord, and then plug the power cord. Then the factory OSD will be at the left top of the panel.
Bias adjustment:
Set the Contrast to 50; Adjust the Brightness to 80.
Gain adjustment:
Move cursor to “-F-” and press MENU key.
A. Adjust Warm (6500K) color-temperature
1. Switch the chroma-7120 to RGB-Mode (with press “MODE” button)
2. Switch the MEM.channel to Channel 3 (with up or down arrow on chroma 7120)
3. The LCD-indicator on chroma 7120 will show x = 313 ±30, y = 329 ±30, Y>140cd/m2
4. Adjust the RED on factory window until chroma 7120 indicator reached the value R=100
5. Adjust the GREEN on factory window until chroma 7120 indicator reachedthe value G=100
6. Adjust the BLUE on factory window until chroma 7120 indicator reached the value B=100
7. Repeat above procedure (item 4, 5, 6) until chroma 7120 RGB value meet the tolerance =100±2
B. Adjust Normal (7300K) color-temperature
1. Switch the chroma-7120 to RGB-Mode (with press “MODE” button)
2. Switch the MEM.channel to Channel 4(with up or down arrow on chroma 7120)
3. The LCD-indicator on chroma 7120 will show x = 302 ±30, y = 318 ±30, Y>130cd/m2
4. Adjust the RED on factory window until chroma 7120 indicator reached the value R=100
5. Adjust the GREEN on factory window until chroma 7120 indicator reachedthe value G=100
6. Adjust the BLUE on factory window until chroma 7120 indicator reached the value B=100
7. Repeat above procedure (item 4, 5, 6) until chroma 7120 RGB value meet the tolerance =100±2
C. Adjust Cool (9300K) color-temperature
1. Switch the Chroma-7120 to RGB-Mode (with press “MODE” button)
2. Switch the MEM. Channel to Channel 9 (with up or down arrow on chroma 7120)
3. The LCD-indicator on chroma 7120 will show x = 283 ±30, y = 297 ±30, Y>110cd/m2
4. Adjust the RED on factory window until chroma 7120 indicator reached the value R=100
5. Adjust the GREEN on factory window until chroma 7120 indicator reached the value G=100
6. Adjust the BLUE on factory window until chroma 7120 indicator reached the value B=100
7. Repeat above procedure (item 4, 5, 6) until chroma 7120 RGB value meet the tolerance =100±2
D. Adjust sRGB color-temperature
1. Switch the chroma-7120 to RGB-Mode (with press “MODE” button)
2. Switch the MEM.channel to Channel 10 (with up or down arrow on chroma 7120)
3. The LCD-indicator on chroma 7120 will show x = 313 ±30, y = 329 ±30, Y>140cd/m2
4. Adjust the RED on factory window until chroma 7120 indicator reached the value R=100
5. Adjust the GREEN on factory window until chroma 7120 indicator reachedthe value G=100
6. Adjust the BLUE of on factory window until chroma 7120 indicator reached the value B=100
7. Repeat above procedure (item 4, 5, 6) until chroma 7120 RGB value meet the tolerance =100±2
E. Turn the Power-button off to quit from factory mode.
715G2852-2 SMPS board Circuit Diagram (Schematic) and PWB
Back Light inverter schematic
Click on the pictures to zoom in
Posted By: FRANK at 02:04
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