BTP-R356 Ⅱ 用户手册 - 2 - 4.7 打印机自检 .....................................................................................15 5 接口信号 ................................................................................. 16 5.1 并行接口 ......................................................................................... 16 5.2 串行接口 ......................................................................................... 17 5.3 电源接口定义 ................................................................................. 17 5.4 钱箱接口的信号定义 ..................................................................... 18 6 故障处理 ................................................................................. 19 6.1 打印机不工作 ................................................................................. 19 6.2 告警指示灯和蜂鸣器报警 ............................................................. 19 6.3 打印过程中出现的问题 ................................................................. 19