A two-pinned 13.824 MHz crystal oscillator broke away from the pads on a PCB board. One pad is labeled + and the other is GND. Do two-pin crystal oscillators have specific polarity?
closed as off-topic by Leon Heller, Dave Tweed♦, alexan_e, Chetan Bhargava, Daniel Grillo Feb 5 '14 at 15:08
This question appears to be off-topic. The users who voted to close gave this specific reason:
- "Questions on the repair of consumer electronics, appliances, or other devices must involve specific troubleshooting steps and demonstrate a good understanding of the underlying design of the device being repaired. See also: Is asking on how to fix a faulty circuit on topic?" – Leon Heller, Dave Tweed, alexan_e, Chetan Bhargava, Daniel Grillo
Simple two-pin oscillator crystals don't have a specific polarity (the circuit which drives them does). It doesn't matter how you insert it; it'll work.
Since piezo crystals are electromechanical devices, the shock which caused the component to come loose may also have damaged it internally. If the device doesn't work after soldering it back into place, try getting a new crystal.
You might also want to check whether the solder pads on the PCB are still OK. With this type of damage, the copper pads often "stick" to the component rather than the PCB itself.