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Operation theory
Engine controller system
FS-6750
16
VDD
Power terminal
17
TNMOC*
IN
Toner motor over-current detection input L: Over-
current
Developer
18
TNEMP*
IN
Developer interior toner detection input, L: No
toner
Developer
19
TNCON
Waste toner bottle detection input, H: Not
installed
Waste toner bottle
20
CBIAS
OUT
Transfer reverse bias on output, H: On
Neg.
21
VSS
Power terminal (Ground)
22
TRCHON2
Transfer limit voltage change
Neg.
HV unit
23
SDVDR1
OUT
Separation remote output, H: On
Neg.
HV unit
24
HVCLK1
OUT
Developing bias clock output 1
HV unit
25
HVCLK2
OUT
Developing bias clock output 2
HV unit
26
TRCHON1
OUT
Transfer remote on output, H: On
Neg.
HV unit
27
MCHON
OUT
Main charging remote on output, H: On
Neg.
HV unit
28
DEVSEL*
OUT
Not used
Pos.
29
SPVDR2
OUT
Separation output current change
Neg.
HV unit
30
PSEL
OUT
Transfer current change
Neg.
HV unit
31
VSS
Power terminal (Ground)
32
IXIN
IN
Quartz oscillator input terminal
33
OVDD
Power terminal for quartz oscillator
34
BXIN
IN/OUT
Quartz oscillator input/output terminal
35
SAMPLE2*
OUT
Not used
36
REGDR
OUT
Regist. roller clutch on output, H: On
Neg.
Drive assembly
37
MPFCLH
OUT
MP lift solenoid on output, H: On
Neg.
Drive assembly
38
FEDDR
OUT
Cassette roller clutch on output, H: On
Neg.
Drive assembly
39
MPFSOL
OUT
Paper feed solenoid for MP tray on output, H: On Neg.
Drive assembly
40
MMOTRDY
IN
Main motor ready input, L: Ready
Drive assembly
41
VSS
Power terminal (Ground)
42
MMOTON
OUT
Main motor on output, H: On
Neg.
Drive assembly
43
FGIN
IN
Main motor rotation clock input
Drive assembly
44
BFANON
OUT
Box fan on output, H: On
Neg.
Box fan
45
BFANSPD
OUT
Box fan speed control output, H: High speed/L:
Low speed
Pos.
Box fan
46
VDD
Power terminal
47
FPRST*
OUT
Front panel reset output, L: Resetting
Pos.
Front panel
48
POLRDY*
IN
Polygon motor ready input, L: Ready
Scanner unit
49
POLCLK
OUT
Polygon motor number of rotations setting output
Scanner unit
50
POLON
OUT
Polygon motor on output, H: On
Neg.
Scanner unit
51
VSS
Power terminal (Ground)
52
LASER*
OUT
Laser light emission enable output, L: Enable
Pos.
Scanner unit
53
SAMPLE*
OUT
Laser light quantity sample/hold output 1, L:
Sample
Pos.
Scanner unit
54
POWCONT
OUT
Not used
Pos.
55
PDIN*
IN
Pin photo detection input, L: Scanning
Scanner unit
56
VDFON2*
OUT
Not used
Pos.
57
PDOUT*
OUT
Pin photo detection input, L: Scanning
Pos.
Main I/F
58
SYSRES*
OUT
Controller reset output, L: Reset
Pos.
Main I/F
Table 4. 3 g/a pin assignment—2/4
Pin no.
Signal
In/Out
Function
Logic
Remarks
Содержание FS-6750
Страница 1: ...SERVICE MANUAL...
Страница 6: ...Conventions Preface vi This page left intentionally blank...
Страница 52: ...Maintenance Handling the developer unit 3 10 FS 6750 Insert the developer into the container as shown below...
Страница 120: ...Disassembly Disassembly Option paper feeder 5 24 FS 6750 This page left blank intentionally...
Страница 148: ...Troubleshooting Print quality problems 6 28 FS 6750 This page left blank intentionally...