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PT-1900
Brother PT-1900 User Manual
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III-
19
[ 8 ]
Removing the Power Supply PCB
(1)
Remove the positive (+) and negative (-) terminals of the battery power cords from the
bottom cover.
Note: When handling those terminals, do not grip the cords but the terminal plates.
(2)
Remove the one screw from the power supply PCB.
Fig. 3.1-21 Removing the Power Supply PCB
Negative (-) terminal
Screw
Power supply PCB
Grounding wire
Power supply harness
Positive (+) terminal
Bottom cover
46
48
Table of Contents
Default Chapter
3
Table of Contents
3
Chapter Ispecifications
6
Mechanical Specifications
6
External Appearance
6
Keyboard
7
Display
7
Printing Mechanism
7
Tape Cassette
8
Tape Cutter
8
Electronics Specifications
15
Character Generator
15
Power Supply
15
Key Commands for Special Functions
15
Initializing
15
Demonstration Print
15
Chapter II General Mechanisms
16
Main Mechanism
16
Print Mechanism
16
Roller Holder ASSY Setting & Retracting Mechanism
18
Tape & Ribbon Feed Mechanism
19
Automatic Tape Cutter Mechanism (PT-1900/1910
21
Tape Cutter Mechanism (PT-1850
22
Roller Holder ASSY & Cassette Cover Interlocking Mechanism
23
Outline of Control Electronics
25
Configuration of the Electronic Part
25
Main PCB
25
Power Supply PCB
25
Cassette Sensor
25
DC Motors
25
Thermal Print Head
25
Main Pcb
26
Block Diagram
26
Solder Points
27
Power Supply Pcb
28
Chapter III Disassembly & Reassembly
29
Disassembly Procedure
29
Removing the Battery Lid and Batteries
29
Removing the Tape Cassette and Tape Separator Stick
30
3 ] Removing the Bottom Cover
32
4 ] Removing the Cassette Cover, Main Frame ASSY
35
Removing the Main PCB Unit and Rubber Key Pad
44
6 ] Removing the Switch ASSY
46
7 ] Removing the Blind Cover
46
8 ] Removing the Power Supply PCB
47
9 ] Removing the Battery Terminals
48
Reassembly Procedure
49
1 ] Installing the Battery Terminals
49
2 ] Installing the Power Supply PCB
50
3 ] Installing the Blind Cover
52
4 ] Installing the Switch ASSY
53
5 ] Installing the Rubber Key Pad
54
6 ] Installing the Main PCB Unit
55
7 ] Installing the Main Frame ASSY
57
8 ] Installing the Bottom Cover
65
9 ] Installing the Cassette Cover
67
10 ] Installing the Tape Cassette and Tape Separator Stick
68
11 ] Loading Batteries and Installing the Battery Lid
69
12 ] Demonstration Print and Final Check
70
Chapter IV Troubleshooting and Error Message
76
Troubleshooting
76
Precautions
76
After Repairing
76
Troubleshooting Flows
77
1 ] Tape Feeding Failure
77
2 ] Printing Failure
79
3 ] Powering Failure (Nothing Appears on the LCD
81
4 ] no Key Entry Possible
83
5 ] Tape Cutting Failure
84
6 ] Abnormal LCD Indication
85
7 ] Tape Cassette Type Not Identified
86
Error Message
87
Error Message List
87
4
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Brother PT-1900 Specifications
General
Brand
Brother
Model
PT-1900
Category
Label Maker
Language
English
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