Brother PT-1800 Service Manual page 16

CHAPTER II MECHANISMS
2.1 THEORY OF OPERATION .................................................................................................. II-1
2.1.1 Print Mechanism...................................................................................................... II-1
2.1.2 Platen and Tape Feed Sub Roller Setting & Retracting Mechanism ....................... II-3
2.1.3 Regular Tape & Ribbon Feed Mechanism............................................................... II-4
2.1.4 Tape Cutter Mechanism .......................................................................................... II-6
2.1.5 Roller Holder ASSY & Cassette Cover Interlocking Mechanism.............................. II-7
2.2 DISASSEMBLY & REASSEMBLY........................................................................................ II-8
2.2.1 Disassembly Procedure........................................................................................... II-8
[ 1 ] Removing the Battery Lid and Batteries.................................................................. II-8
[ 2 ] Removing the Tape Cassette ................................................................................. II-9
[ 3 ] Removing the Bottom Cover ................................................................................. II-10
[ 4 ] Removing the Chassis ASSY................................................................................ II-11
[ 5 ] Removing the Main PCB and Rubber Key Pad..................................................... II-14
[ 6 ] Removing the Cassette Sensor PCB .................................................................... II-15
[ 7 ] Removing the Blind Cover .................................................................................... II-15
[ 8 ] Removing the Power Supply PCB ........................................................................ II-16
[ 9 ] Removing the Battery Terminals........................................................................... II-16
2.2.2 Reassembly Procedure ......................................................................................... II-17
[ 1 ] Installing the Battery Terminals............................................................................. II-17
[ 2 ] Installing the Power Supply PCB .......................................................................... II-17
[ 3 ] Installing the Blind Cover ...................................................................................... II-18
[ 4 ] Installing the Cassette Sensor PCB ...................................................................... II-18
[ 5 ] Installing the Rubber Key Pad .............................................................................. II-19
[ 6 ] Installing the Main PCB......................................................................................... II-19
[ 7 ] Installing the Chassis ASSY.................................................................................. II-20
[ 8 ] Installing the Bottom Cover ................................................................................... II-23
[ 9 ] Installing the Cassette Cover ................................................................................ II-24
[10] Installing the Tape Cassette ................................................................................. II-25
[11] Loading Batteries and Installing the Battery Lid.................................................... II-25
[12] Demonstration Print and Final Check ................................................................... II-26
CONTENTS