The customer needs phone to shield the use of cell phone when necessary

The customer needs phone to shield the use of cell phone when necessary
Emission current is too large or too small, specific performance: dial 112 when you press the launch button, and sometimes can play, but the current is high (above 400mA), or less (at 100mA or less), this situation generally check the power amplifier, high release (launch pre-amplification) pipe for damage. The response of the emission current can not call specific performance: dial 112 when you press the launch button, the current from the standby current increased to 100mA or so horde for some time and then fall back to the standby current. Some Check the power control when there is no signal output, and then prescribe the right remedy. Failure detection method. Receiving circuit, should focus on checking the antenna switch, filter, and 13 megabytes of AFC (about 1-1.5V transition). The needed shielding range of phone can be met by selecting the appropriate installation position and height.The semi finished product of phone should be passed on to the nest procedure
I removed the two filters to get the capacitor connected across the no signal and then reinstall the CPU does not work, and again asked the guests is normally used in case of no signal, if that is normally used in case of no signal then the hardware should be no any questions that write software test it to the network under disassemble software rewrite installed on a test OK signal. Telsda T608 + signal, the machine have not been revised to keep up with a current almost terminated a copper wire or no signal after the filter in the 900M, the machine is no signal of the machine under normal repair, write software test about , and later when I press * # 06 # to find the serial number is 0000000000000000, and more want to write software to try. System of completely personal responsibility is performed to phone .
The demolition of the font to the East China Sea 72 backup detection font has short-circuit or model, does not back together who knows a signal * # 06 # IMEI or ignore it anyway, a signal on the line. Later remembered a friend said he said he repaired one of these machines font dilute welding can also cause no signal MT column machine. It seems there is always the case. These two cases we have. MT chip series machine handset silent change headphones First, check the headset voltage with or without 1.2V short Headset 2.4 feet. 3-foot fly line from the headset to a handset. MTK series microarrays boot screen [2] now the MTK Ruipian the machine, some machines you do not have the software. Only the signal in the specific area can be shielded by phone .