MX3500N EXTERNAL VIEW AND INTERNAL STRUCTURE 5 – 14
M. PWB
No. Name Function/Operation Note
1 RD I/F PWB Detects the sensors in the right door unit.
2 Tray 1 detection PWB Detects the tray 1.
3 Tray 2 detection PWB Detects the tray 2.
4 DC power PWB Outputs the secondary side voltage.
5 Driver main PWB Drives the transport motor and related sections.
6 MC PWB Generates the high voltage for the main charger and the developing bias voltage.
7 Primary transfer PWB Generates the primary transfer voltage.
8 AC power PWB Controls the primary side power source.
9 Scanner control PWB Controls the scanner section.
10 CCD PWB Scans the document images.
11 Phase detection PWB Adjusts the BL/CL drum phase.
12 CL inverter PWB Drives the xenon lamp.
13 Document detection light receiving PWB Outputs the document size detection signal.
14 Document detection light emitting PWB Emits the document size detection LED lights.
15 LCD INV PWB Generates the high voltage for the LCD backlight.
16 LVDS PWB Converts the display signal and outputs to the LCD.
17 MFP OPE-P PWB Outputs the key operation signal.
18 Power SW PWB Outputs the ON/OFF control signal of the DC power source.
19 HL PWB Controls the heater lamp.
20 Driver sub PWB Drives the process motor and related sections.
21 Secondary transfer PWB Generates the secondary transfer voltage and the transfer belt cleaning voltage.
22 Temperature/humidity sensor PWB Detects the ambient temperature and humidity.
23 Manual paper feed width detection PWB Detects the manual paper feed tray paper width.
24 MFPcnt PWB Controls images and the whole machine.
25 Mother PWB Interfaces the MFPcnt PWB and other PWB.
26 PCU PWB Controls the engine section.
27 PCU Flash ROM PWB Controls the PCU PWB.
28 BD PWB Detects laser and outputs the synchronous signal.
29 LSU CNT PWB Controls the LSU.
30 LSU thermistor Measures the temperature in the LSU.
31 DL PWB Discharges electric charges on the OPC drum.
32 DV initial PWB Detects the DV model.
33 LD PWB Controls laser lighting.
DV
LSU
control box
10
21
23
22
1
13
18
17
15
16
12
14
9
39
37
19
20
8
24
25
26
27
28
29
30
31
32
4
5
11
2
3
7
6
38
33
34
35
36
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