Read Sharp MX-1800N (serv.man13) Service Manual online
MX-1800N EXTERNAL VIEW AND INTERNAL STRUCTURE 5 – 13
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.
34
DOCC PWB
Recognizes the document control pattern.
Option
DV
LSU
control box
10
21
23
22
1
13
18
17
15
16
12
14
9
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
36
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