Brother PT-1090 Service Manual page 4

[ 10 ] Removing the Battery Terminals A.............................................................................. III-14
[ 11 ] Removing the Cutter Sensor ASSY, the Main PCB ASSY
and the Cassette Sensor PCB ASSY ............................................................................ III-15
[ 12 ] Removing the Contact Sheet and the Rubber 52 Key .................................................. III-17
3.1.2 Reassembly Procedure.................................................................................................... III-18
[ 1 ] Installing the Rubber 52 Key and the Contact Sheet.................................................... III-18
[ 2 ] Installing the Cassette Sensor PCB, the Main PCB ASSY
and the Cutter Sensor ASSY ........................................................................................ III-19
[ 3 ] Installing the Battery Terminals A ............................................................................... III-22
[ 4 ] Installing the Ribbon Clutch Spring,
the Ribbon Drive Gear and the Ribbon Drive Cam ..................................................... III-23
[ 5 ] Installing the DC Motor ASSY and the Motor Holder................................................. III-24
[ 6 ] Installing the Gears....................................................................................................... III-25
[ 7 ] Installing the Head ASSY ............................................................................................ III-26
[ 8 ] Installing the Roller Holder Release Spring, the Roller Holder ASSY,
the Cutter Lever Spring and the Cutter Lever .............................................................. III-27
[ 9 ] Installing the + Terminal ASSY ................................................................................... III-28
[ 10 ] Installing the - Terminal ASSY and the Terminal Press Cover ................................... III-29
[ 11 ] Assembling the Bottom Cover and the Upper Cover,
and installing the Board and the Cutter Case ASSY .................................................... III-31
[ 12 ] Installing the Dry Cells, the Tape Cassette and the Cassette Cover............................. III-33
3.2 Final Check and Inspection Mode ........................................................................................ III-35
CHAPTER IV TROUBLESHOOTING
4.1 Precautions..............................................................................................................................IV-1
4.2 After Repairing .......................................................................................................................IV-1
4.3 Troubleshooting Flows ...........................................................................................................IV-2
[ 1 ] Tape feeding failure........................................................................................................IV-2
[ 2 ] Printing failure................................................................................................................IV-4
[ 3 ] Powering failure (Nothing appears on the LCD.) ..........................................................IV-6
[ 4 ] No key entry possible ..................................................................................................... IV-7
[ 5 ] Tape cassette type not identified ....................................................................................IV-8
Appendix 1 Main PCB Circuit Diagram
Appendix 2 Key PCB Circuit Diagram