a-four) Verify In the event the pins of the main chip will not be soldered effectively (it had been located in repair which the pins are tinned observing through the side, although the pins usually are not stained with tin in the slightest degree if the chip is removed)

It is frequently a result of higher ambient temperature and irregular supporter Procedure to the machine not to be capable to do the job Commonly. Abnormal lovers operation will also result in abnormal temperature.

Stage three: Click on the “plan” button. Right after completion, simply click “verify”. It is going to prompt that the verification is done to demonstrate the burning is productive.

Repair approach: throughout the PT2 test, Test the serial port print log. Once the serial port begins to function for the long time, use a brief-circuit probe to short-circuit RO&one.

③ Utilize a multimeter to measure the resistor of R8 or R9 to determine if it is in just 10 ohms, as well as the studying will likely not bounce randomly. If not, switch each resistors;

Or the two ASIC chips With this domain are usually not soldered thoroughly. The majority of them are brought on by quick circuit of 0.8V and 1.2V patch filter capacitors (evaluate the resistance of your patch filter capacitors connected with the back and front sides from the PCBA).

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Examine the welding quality of the heat-sensitive chip along with the small heat sink. The deformation of the large warmth sink materials will bring about poor heat dissipation on the chip and have an affect on the temperature big difference.

2. Enter the consumer name, password and test command to check the NONCE reaction status and also the status of voltage domain. In the event the NONCE and area voltage are irregular, user can complete measurement and servicing according to the printed irregular chip.

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9. The check fixtures at the maintenance conclude all make use of the Test_Mode method and make use of the scan code mode for testing.

3. The take a look at SD card will likely be built In line with the necessities, along with the double-sided warmth sink eight-times Patter examination needs to make an SD card, as shown while in the determine down below;

① The first case: (usually the worth of the noted chip is not going to transform each individual exam), this scenario is likely to generally be caused by abnormal soldering on the front and rear CLK, CI, BO of the X-th chip, so give attention to these six resistors.

In keeping with this method, discover the chip that also has the long-term working failure immediately after a specific chip is brief-circuited. Usually, it can be a result of a certain chip harmful, so just replace it; Figure five-twenty seven. Phenomenon: PT1 chip test is OK, PT2 operate take a look at always reviews a certain chip NG;