Brother DP-525CJ - Page 9

SERVICE MANUAL
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Figure Title Page
Fig. 2.10 Carriage Motor Drive Circuit................................................................................ 2-12
Fig. 2.11 Line Feed Motor Drive Circuit ............................................................................. 2-13
Fig. 2.12 Carriage Home Position Sensor Circuit............................................................... 2-14
Fig. 2.13 PE Sensor Detection Circuit ............................................................................... 2-14
Fig. 2.14 External View of the Switch PCB ........................................................................ 2-15
Fig. 2.15 Switch PCB Circuit ............................................................................................. 2-15
Fig. 2.16 Key/FPC Operation ............................................................................................ 2-16
Fig. 2.17 Electrode Wiring................................................................................................. 2-17
Fig. 2.18 Keyboard Control Circuit..................................................................................... 2-18
Fig. 2.19 Keyboard Matrix ................................................................................................. 2-19
Fig. 2.20 Keyboard Symbols (Corresponding to Keyboard Matrix in Fig. 2.19)................... 2-19
Fig. 2.21 LCD Display Operation Block Diagram................................................................ 2-20
Fig. 2.22 Example of Control Signal Timing Chart.............................................................. 2-21
Fig. 2.23 LCD Drive Voltage Generation Circuit (Minus Voltage VEE)................................ 2-22
Fig. 2.24 LCD Drive Voltage Generation Circuit (Plus Voltage VEE).................................. 2-22
Fig. 2.25 CFL Backlight Circuit.......................................................................................... 2-23
Fig. 2.26 FDD Block Diagram............................................................................................ 2-25
Fig. 3.1 Troubleshooting Flowchart.................................................................................... 3-4
Fig. 3.2 Troubleshooting Flowchart (continued) ................................................................. 3-5
Fig. 3.3 Serial Number Entry Display............................................................................... 3-14
Fig. 3.4 Self-Print Pattern................................................................................................ 3-15
Fig. 3.5 Results of Self-Print Test.................................................................................... 3-17
Fig. 3.6 Self-Test Menu................................................................................................... 3-18
Fig. 3.7 LCD Test Menu .................................................................................................. 3-20
Fig. 3.8 CHECK Test Display (magnified)........................................................................ 3-21
Fig. 3.9 CROSS Test Display (magnified)........................................................................ 3-22
Fig. 3.10 BLACK Test Display........................................................................................... 3-23
Fig. 3.11 DISP Q Test Display (magnified) ........................................................................ 3-24
Fig. 3.12 Slant Line Test Display (magnified)..................................................................... 3-25
Fig. 3.13 Printer Check #1 (in progress) Display................................................................ 3-26
Fig. 3.14 Diagram of Print Test Pattern 1 .......................................................................... 3-27
Fig. 3.15 Sample Print Test Pattern 1................................................................................ 3-28