Control
Functions
2-3
Amount of carrier passing TDC sensor
Toner density condition Sensor output voltage
Less
High
Lower than normal
Much
Low
Higher than normal
<Control>
The following controls are necessary for normal control of toner density
1)
Automatic adjustment of TDC sensor gain (during execution of F8-C09)
(to attain the standard reference level).
2)
Maintain the standard level by control of toner density during use.
<Explanation of the control system>
1)
Automatic adjustment of TDC sensor gain
Automatically adjust the reference through the TDC sensor by executing service
mode F8-09.
The operation flow is as shown below.
2. 2 Toner Density Control
To keep toner density(toner carrier ratio) in the developer unit constant, the TDC
sensor (toner density sensor) which is installed under the developer unit detects the
amount of carrier in the developer unit to control the toner density.
<Fundamentals>
The change in magnetic flux density in accordance with the amount of carrier
(magnetic power) in the developer (mixture of toner and carrier) is detected by the
TDC sensor and is converted to a voltage to control the toner density.
<Change of toner density and change of TDC sensor output voltage>
F8-09 start
CPU will check toner density sensor output. (2.5 V)
CPU will adjust sensor gain
control signal
Memory number will be changed to new number in memory.
(F6-21 or F6-26)
Toner density sensor output voltage will be adjusted to 2.5 V
Yes
No
Содержание FA-DS72
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Страница 178: ...11 Frame 1 2 34 PM706 S 16 17 18 26 25 24 23 22 20 21 33 31 8 30 29 28 27 19 14 13 11 15 2 9 12 7 32 5 4 3 ...
Страница 232: ...25 Paper Exit Section PM709 1 2 3 4 5 6A 7 16 15 14 13 6B 8A 9A 9C 9C 9A 11 S10 10 8A 8B 9B 17 8B 9B 12 19 18 12 18 ...
Страница 234: ...26 550 Sheet Paper Tray PM201 19 20 21 17 22 15 15 20 19 25 24 23 26 16 1 2 3 4 13 14 6 6 8 11 12 10 7 5 27 ...
Страница 236: ...27 Sheet Bypass Tray PM102 8 1 7 5 3 4 6 10 11 4 12 13 9 16 15 18 14 4 17 2 ...
Страница 238: ...28 ADU PM801 16 8 1 4 14 12 10 11 11 13 13 6 7 8 16 9 5 3 2 15 ...
Страница 249: ...Numerical Parts Index Description Part No Q ty Per Unit Ref No Page No Numerical Parts Index 33 ...
Страница 316: ...3 10 3 3 Adjustment 1 ON 2 3 4 5 6 Sorter controller PCB LED SW1 SW3 FA S620 SW2 SW3 SW1 FA S660 ...
Страница 360: ...1 4 7 10 8 9 5 6 2 3 1 Sorter Mounting Assembly ...
Страница 362: ...1 2 5 J41 3 6 7 8 4A 4 2 Covers ...
Страница 370: ...A 4 5 2 6 3 4 7 1 9 9 12 10 13 14 15 16 17 18 19 20 21 22 8 J22 M4 M2 J35 A 6 Drive Block ...
Страница 379: ...1 2 3 4 5 6 7 10 8 9 1 Sorter ...
Страница 381: ...1 A 3 4 5 12 13 15 9 10 11 6 7 8 16 2 14 13A J202 J202 J104 2 Covers ...
Страница 389: ... 6 Stapler Unit 1 5 4 3 6 2 7 8 9 10 7A 11 14 12 18 20 19 17 See P 4 33A 13 16 15 J102 J201 J103 J116 M4 MS3 ...