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!

©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 !

Friday 1 March 2019

HAIER HL24XD2 – SERVICE MODE, ADJUSTMENTS, SMPS- 715G3754P01W30003H AND AUDIO AMPLIFIER SCHEMATIC

Haier HL24XD2 – Service mode, adjustments, SMPS- 715G3754P01W30003H and audio amplifier schematic


Haier HL24XD2 23.6″ LCD TV Horizontal Frequency 31~68 KHz - Power Board 715G3754P01W30003H, Backlight inverter,  audio amplifier schematics, service mode and adjustments, parental lock and more
Supported scan rate: 640x480@60/72/75Hz,720x400@70Hz,
800x600@56/60/72/75Hz,1024x768@60/70/75Hz,
1280x720@60Hz,1280x768@60Hz
1360x768@60Hz:For HL19D2 / HL32D2 only.
1280x1024@60Hz,1440x900@60Hz,1680x1050@60Hz
1920x1080@60Hz: For HL24XD2 / HL42XD2 only.
Recommended: For HL19D2 / HL32D2: 1360x768
For HL24XD2 / HL42XD2: 1920x1080
Component Video and L/R Audio input
Supported resolution: 480i,480p,720p,1080i,1080p

Parental Control: Provide the parental Control (V-chip) function setting. Before entering the Parental Control sub-menu, user has to key in the password first. Enter the Parental Lock item, then the user can modify the restricted table about MPAA or TV Rating respectively. While exiting the sub-menu, the parental control function is working. The inhibit channels or source signals can be unlocked through key in the correct password. Note: This feature is only available in TV, Composite and S-Video source modes. 
(The default password is: 0 0 0 0.)
Password Setting: Change the 4-numeral parental control password. Three steps are required for changing the password: Enter Old Password > Enter New Password >Confirm New Password.
Note: This item is only available in TV, Composite and S-Video source modes. 
The default password is 0 0 0 0
Service mode [Factory mode] adjustment
There is no need to adjust the white balance for this model, do ADC only.
Step1: Turn on the TV, press “Menu”, then press number key 1 > 9 > 9 > 9 and “ENTER”, it will achieve the factory mode [Service Mode]
Step2: Change TV, press the “Current Source” to Component mode and change signal to 1080i mode, press the “Auto Color”;
Step3: Change TV, press the “Current Source” to PC mode and change signal to PC TIMING 137(1024X768); Pattern 147 (16 Grays), press the “Auto Color”.
Button Lock – Select On or Off to lock or unlock the control buttons on the side panel of the TV. When this function enables, the control buttons on your TV will be locked and TV only can be controlled by remote control only.
Block Unrated TV – When Block Unrated TV is set to on, your TV will block unrated program.
USA Parental Locks – Set the parental control level by MPAA or TV Rating.
Canadian Parental Locks – Set the parental control level by English Rating or French Rating.
Open V-Chip – Open V-Chip is an advanced V-Chip rating system for digital channels that are received.
The rating table will be updated by downloading the RRT5 data for blocking.
SMPS schematic
Back-light inverter
Sub-power
Audio amplifier
Closed Captions: Select a closed caption options. (Off / On / With Mute) Analog Captions: Select an analog caption options. (CC 1-4 / TEXT 1-4) Digital Captions: Select a digital caption options. (SERVICE 1-6) Digital Captions Setup: Provide numerous options for setting the digital closed caption style in the sub-menu. Style – Set to Automatic or Customer mode. If Custom mode is selected, user can modify the detail styles.  The setting result will be shown immediately on the bottom of the sub-menu OSD. 
Note: This feature is only available in Digital TV (ATSC) mode.
 Size – Digital closed caption font size, which can be set as Automatic, Small, Normal, or Large.
Font – Digital closed caption font style, which can be chosen as Automatic, Default, or Font 1 ~ 7.
Text Color – Automatic / White / Red / Green / Blue / Yellow / Magenta / Cyan / Black.
Text Opacity – Automatic / Solid /Flashing / Transparent / Translucent.
Background Color – Automatic /Black / White/ Red / Green / Blue / Yellow /Magenta / Cyan.
Background Opacity – Automatic /Solid / Flashing / Transparent / Translucent.
Edge Effect – Automatic / None/ Raised / Depressed / Uniform / Left / Shadow / Right Shadow.
Edge Color – Automatic / Red / Green / Blue / Yellow / Magenta / Cyan / Black / White.
Input Labels: User can edit the input labels.
Component Setting: This option only shows and is available in component mode, which provides fine tuning component display.
Phase – Adjust Picture Phase to reduce Horizontal-Line noise. The tuning range is from 0 to 31.
Preset – Restore the default component setting values.
Posted By: FRANK at 05:57
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