Experience shows that the crystal oscillator foot is thick and the most likely to be broken. Because the shock is poor!
The improvement method is: separate the foot of the crystal and the circuit board, use a double-sided tape, thick. Put the double-sided tape on the position of the crystal. Then the crystal is attached to the double-sided tape. Stick the crystal to the crystal with glue (not used for 502). Pay special attention when sticking glue: don't stick too much. So as not to affect the anti-shock effect of double-sided tape! Then the foot of the crystal is connected to the board just by a small wire. Ok!
Trial proof: the effect is very good. The guest fell to the microphone cover and both sides were open, and there were launches. Special note: This method is suitable for customers who are far away from the MIC manufacturer! Need to know a little about electronic knowledge! This method of not knowing the crystal oscillator is for reference only.
The wireless microphone used in KTV will inevitably fall or fall to the ground. It is easy to cause the fragile crystal oscillator inside the microphone to break, resulting in no launch! The appearance of the crystal oscillator is good, but it has been broken, and it is shaken at the ear. I can hear the sound inside. Prove that it is broken! (I haven't got it, I have to change it)
Experience shows that the crystal oscillator foot is thick and the most likely to be broken. Because the shock is poor!
The improvement method is: separate the foot of the crystal and the circuit board, use a double-sided tape, thick. Put the double-sided tape on the position of the crystal. Then the crystal is attached to the double-sided tape. Stick the crystal to the crystal with glue (not used for 502). Pay special attention when sticking glue: don't stick too much. So as not to affect the anti-shock effect of double-sided tape! Then the foot of the crystal is connected to the board just by a small wire. Ok!
Trial proof: the effect is very good. The guest fell to the microphone cover and both sides were open, and there were launches. Special note: This method is suitable for customers who are far away from the MIC manufacturer! Need to know a little about electronic knowledge! This method of not knowing the crystal oscillator is for reference only.
The wireless microphone used in KTV will inevitably fall or fall to the ground. It is easy to cause the fragile crystal oscillator inside the microphone to break, resulting in no launch! The appearance of the crystal oscillator is good, but it has been broken, and it is shaken at the ear. I can hear the sound inside. Prove that it is broken! (I haven't got it, I have to change it)
Experience shows that the crystal oscillator foot is thick and the most likely to be broken. Because the shock is poor!
The improvement method is: separate the foot of the crystal and the circuit board, use a double-sided tape, thick. Put the double-sided tape on the position of the crystal. Then the crystal is attached to the double-sided tape. Stick the crystal to the crystal with glue (not used for 502). Pay special attention when sticking glue: don't stick too much. So as not to affect the anti-shock effect of double-sided tape! Then the foot of the crystal is connected to the board just by a small wire. Ok!
Trial proof: the effect is very good. The guest fell to the microphone cover and both sides were open, and there were launches. Special note: This method is suitable for customers who are far away from the MIC manufacturer! Need to know a little about electronic knowledge! This method of not knowing the crystal oscillator is for reference only.
The CH0004 is a self-contained Battery Charger/conditioner mounted in a ruggedized environmentally resistant case, which provides a reliable and consistent recharge of one or two batteries simultaneously. The CH0004 auto senses battery type to assure proper charge profile.
Unattended Charging
• Smart charge modules that detect open or shorted cells. If a defective cell is detected the CH0004 will not start charge cycle
• No programming or special instruction set to achieve safe and complete recharge of battery
• In no event will a battery be overcharged using the smart charging
techniques of the CH0004
Wide Range Input Voltage
• Allows operation from nearly any AC or DC power source likely to be encountered worldwide
Conditioning Cycle
• Automatic discharge/recharge function included. The conditioning cycle can be activated individually per battery at operator`s option
Recharge Each String of Cells
• To assure a positive recharge of the battery each individual string of cells in the battery is recharged independently
Any combination
of the following batteries: BB-390/U - (NiMH), BB-590/U - (NiCd), BB-2590 /
UBI-2590 (UBBL02) / MRC-2590 /UBBL09 / UBI-2590 SMBus (UBBL10) -Lithium-Ion
(Li-ion)
Military Battery Charger,Battery Charger,Nimh Battery Charger,Lithium Battery Charger
YFJ TECHNOLOGY (HK) CO.,LIMITED , http://www.yfjpower.com