E-sky 12v Lipo charger used on Tx gets quite warm?

[turnbui]

I'm using the 240v-ac-12v-dc adapter that came with the HoneyBee King 2 for Lipo charging plugged into the 6-ch transmitter to save batteries in the Tx whilst I play on FMS but th Tx is getting quite warm just near the crystal. 35Mhx 0406A. Does anyone else have this problem?