求助:泰利特50尿仪

求助:泰利特50尿仪开机后出现 "INSTRUMENT ERROR 4",   进入维修程序后VOLTS为(前为光源灯灭,后为光源灯开)   IR 0.539/3.328     RED 0.596/2.394     GREEN0.560/2.462   BLUE0.580/0.734    REF.3.999/3.999 BAT.8.880/8.842    LAMP.   0.043/5.008   另RD为I: 2794 R:1868 G:1978 B:0150     DRK为I:0552   R :0609  G:0753   B:0595
请问各位专家是什么原因?   muqiangshan@yahoo.com.cn