HTX-404 (190-1140) Error Codes Faxback Doc. # 6178 The HTX-404 has two error code displays. This section explains each error code. Er1 indicates that the HTX-404 has detected an error in its battery-backed up memory. This is most commonly caused by a low lithium backup battery, but can also be caused by static discharge or a physical shock. To clear the error, reset the HTX-404 by turning it off, then holding down F+D while you turn it on again. This clears and reinitializes memory. If the transceiver frequently displays the error, have the battery replaced by an authorized Radio Shack repair center. Er2: PLL Unlock Error Er2 indicates that the HTX-404's PLL section has unlocked. Have the HTX- 404 repaired by an authorized Radio Shack repair center. (RLR-02-25-94)