High-Accuracy Numerical Control Power Supply DZ-0903A

High-Accuracy Numerical Control Power Supply DZ-0903A

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High-Accuracy Numerical Control Power Supply DZ-0903A

Special multi-functional device designed for mobile phone repair
Double protection from burning-the world only device with high accuracy constant voltage and constant current output
Liquid-Crystal display-Reduced internal resistance, increased sensibility and stability of NC adjustment, visualisable setting platform
Adjustable current intensities-Overcurrent protection intensity and constant output intensity
Data-encoding knob-one step for all the settings
Supreme copper made-lower loss at output terminal, higher accuracy of voltage and current output
Connectable to PC and upgradable-instant curve graph of voltage and current enhancement of function and performance of the device.

Technical specifications
Voltage :110~220V:br />Voltage Output:2.00~9.00V accuracy0.001V
current output:0.01~3.00A accuracy0.0001A
constant current output:0.01~2.00A accuracy0.0001A
overcurrent protection 0.1ms~25ms adjustable

device config
main device + Power supply cable+Power output cable+mini USB Cable

Interface introduction
USB/power interface( may be used to upgrade your device by connecting your PC)
main power supply interface 220V/110V
main switch
viewing screen
encoding button
power output positive and negative interface


When power on and displaying normally, with each switch of the knob to select the function settings, you may turn the knobs to adjust the required the settings. After settings and no further operation within 3 seconds, the display returns to idle and it automatically confirms the current settings, and the setting values will be shown at the bottom of screen; when setting up constant voltage or current, a dash will appear under the V or A, respectively.
Turn off the power, the unit will automatically save the settings. And when power on again, the screen shows the parameters of the last settings.
1:ncoding button
Press the button to select functions. Switch it to adjust the required settings; when adjusting voltage or current, quickly switch the button to achieve coarse tuning(+/- 0.1 V/A), or slowly for fine tuning(+/-0.01V/A)

2:onstant voltage function
For cell phones able to power on, the over-current protection value can be set after setting the voltage; Generally, set 1 A for phones with smaller screens, 2 A for phones with larger screens, moderately depending on user experience. Maximum current can be set up to 3A.
3:onstant current function
For cellphones enter over-current protection mode once power on, compulsory power supply is a must. Setting up the constant current can solve such issue. (Power source cannot enter over-current protection). The usual solution to this is to apply constant current and compulsive power supply time to diagnose the problem; faulty circuit will overheat or breakdown components. Maximum constant current can be set up to 2.00 A.

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LCD Screen Grades

ConditionDescriptionLCDGlassFlex CableFrameAppearance Intactness
Aftermarket BasicChina LCDJKAftermarketAftermarketAftermarketNew
Aftermarket StandardFlex Cable ReplacedOriginalAftermarketOriginalAftermarketNew
Aftermarket SelectedGlass ReplacedOriginalAftermarketOriginalAftermarketNew
Original PullsPull From Used DevicesOriginalOriginalOriginalOriginalNew Alike
OriginalOriginal Equipment ManufacturerOriginalOriginalOriginalOriginalNew

In Union Repair store, we grade our iPhone screen into 5 different types of quality on the basis of different material assembled. The following is the full details of each condition.


After Market Basic

It is with widely accept major complaint replacements for original parts, which keeps a right balance between price and quality. It has sustainable supplying chain in China, and all the components of the screen are copy quality. Typically, the LCD screen is from several different factories, the most popular 4 on China market are JK,AUO, LongTeng, and ShenChao. By comparing the brightness and sharpness of the LCD, we found JK is the best quality among them and the second best is AUO. No doubt, the other components on the screen are all copy.


After Market Standard

It is better than After Market Basic cause it comes with original laminated flexes and the LCD panel. Other components like touch panel, frame(hot pressed), backlight, polarize lens, and OCA is all copy from different factories.


After Market Selected

The core components (like LCD and flexes) is 100% original pulled from used iPhone while the frame and touch panel is copy. The touch panel and frame come together with cold pressed glue and assembled together with the LCD by the capable third-party factory which keeps its excellent quality. 


Original Pulls

No doubt, it is tear down from used iPhone with all the parts 100% original and working perfectly just like an original new screen, it has whatever the original new screen has. The only complaint about this quality is that some of the displays are with 1 or 2 scratches but still be welcome by our critical customers who are requiring good quality.


Original New

It is 100% original from Apple-authorized factories like Toshiba, Sharp, and LG. We get this kind of screen from the first level dealer. The touch panel of the screen is oleophobic coated which prevents from fingerprints when using your iPhone. And starting with iPhone 7g, the backlight from different authorized factories comes with a different code. Backlight from Sharp has the code begins with DKH/CON, from Toshiba begins with C11/F7C/FZQ, from LG begins with DTP/C3F. 



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