62
KX-MB1520FX7/KX-MB1520FX8/KX-MB1520FXW/KX-MB1530FX7/KX-MB1530FXW
6.13.8. Drum Life sensor circuit
1. General
This circuit detects whether the drum cartridge is brand-new or secondhand.
And if Drum cartridge is detected as brand-new, after predetermined printing, Fuse, which is installed inside of the Drum car-
tridge is cut.
After cutting the fuse, the Drum cartridge is judged as secondhand, and Drum life counting starts.
This circuit consists of Fuse cut block and Drum type detection block.
2. Circuit diagram
3. Circuit Explanation of Fuse cut block
When IC300_pinT24 is "H", both Q600 and Q602 are turned on. Then current flows F99 through R600/R601. Consequently
Fuse is cut within 1 second.
R600/R601 is supplied to restrict the fuse cut current to protect Q600.
4. Circuit Explanation of Drum type detection block
This block detects whether Drum cartridge is brand-new or secondhand.
And also detect if the contact of the terminal is normal or not (contact error).
(1) In case of Brand-new Drum
Since Fuse is not open, resistance between the fuse is approx. 4 ohm.
So the voltage level of point A in the above circuit diagram is less than 1V.
As the result, both Q604 and Q605 and Q636 are turned on.
(2) In case of secondhand Drum
Since Fuse is open, resistance between the fuse is determined by the resistance of R99 (220ohm).
Since the resistance of R609 is 120ohm, the voltage level of point A in the above circuit diagram is approx.3.5V.
Consequently Q605 is turned on and Q604 is turned off.
(3) In case of contact error of the terminal
Since both F99 and R99 are open condition, resistance between the fuse is infinite.
So the voltage level of point A in the above circuit diagram is approx. 5V.
Then both Q604 and Q605 are turned off.
According to the above transistor condition, the logic level of IC300_pinV24 and V25 are changed as below table.
Thus by checking these 2 signal levels, drum cartridge condition can be detected.
OPC_CNTCT
(IC300_pinV24)
DRUM_LIFE
(IC300_pinV25)
DRUM status
L
L
contact error
H
L
Secondhand
L
H
(Not used)
H
H
Brand-new
Summary of Contents for KX-MB1520FX7
Page 52: ...52 KX MB1520FX7 KX MB1520FX8 KX MB1520FXW KX MB1530FX7 KX MB1530FXW 6 10 3 5 Waveform ...
Page 56: ...56 KX MB1520FX7 KX MB1520FX8 KX MB1520FXW KX MB1530FX7 KX MB1530FXW ...
Page 68: ...68 KX MB1520FX7 KX MB1520FX8 KX MB1520FXW KX MB1530FX7 KX MB1530FXW ...
Page 75: ...75 KX MB1520FX7 KX MB1520FX8 KX MB1520FXW KX MB1530FX7 KX MB1530FXW wave form ...
Page 77: ...77 KX MB1520FX7 KX MB1520FX8 KX MB1520FXW KX MB1530FX7 KX MB1530FXW wave form ...
Page 100: ...100 KX MB1520FX7 KX MB1520FX8 KX MB1520FXW KX MB1530FX7 KX MB1530FXW 10 1 2 Button Code Table ...
Page 108: ...108 KX MB1520FX7 KX MB1520FX8 KX MB1520FXW KX MB1530FX7 KX MB1530FXW KX MB1530 ...
Page 141: ...141 KX MB1520FX7 KX MB1520FX8 KX MB1520FXW KX MB1530FX7 KX MB1530FXW 12 3 8 3 Skew ...
Page 147: ...147 KX MB1520FX7 KX MB1520FX8 KX MB1520FXW KX MB1530FX7 KX MB1530FXW 12 3 9 2 Skew ADF ...
Page 159: ...159 KX MB1520FX7 KX MB1520FX8 KX MB1520FXW KX MB1530FX7 KX MB1530FXW ...
Page 161: ...161 KX MB1520FX7 KX MB1520FX8 KX MB1520FXW KX MB1530FX7 KX MB1530FXW ...
Page 166: ...166 KX MB1520FX7 KX MB1520FX8 KX MB1520FXW KX MB1530FX7 KX MB1530FXW ...
Page 167: ...167 KX MB1520FX7 KX MB1520FX8 KX MB1520FXW KX MB1530FX7 KX MB1530FXW ...
Page 175: ...175 KX MB1520FX7 KX MB1520FX8 KX MB1520FXW KX MB1530FX7 KX MB1530FXW Toner detection flow ...
Page 188: ...188 KX MB1520FX7 KX MB1520FX8 KX MB1520FXW KX MB1530FX7 KX MB1530FXW 2 CHG 3 TRA ...
Page 189: ...189 KX MB1520FX7 KX MB1520FX8 KX MB1520FXW KX MB1530FX7 KX MB1530FXW 4 DEV DC ...
Page 190: ...190 KX MB1520FX7 KX MB1520FX8 KX MB1520FXW KX MB1530FX7 KX MB1530FXW 5 DEV AC ...
Page 191: ...191 KX MB1520FX7 KX MB1520FX8 KX MB1520FXW KX MB1530FX7 KX MB1530FXW 6 TRA ...
Page 218: ...218 KX MB1520FX7 KX MB1520FX8 KX MB1520FXW KX MB1530FX7 KX MB1530FXW 14 10 How to Remove LVPS ...
Page 236: ...236 KX MB1520FX7 KX MB1520FX8 KX MB1520FXW KX MB1530FX7 KX MB1530FXW 14 24 7 Fuser section ...
Page 255: ...255 KX MB1520FX7 KX MB1520FX8 KX MB1520FXW KX MB1530FX7 KX MB1530FXW 15 6 1 NG Example ...
Page 258: ...258 KX MB1520FX7 KX MB1520FX8 KX MB1520FXW KX MB1530FX7 KX MB1530FXW Memo ...
Page 263: ...263 KX MB1520FX7 KX MB1520FX8 KX MB1520FXW KX MB1530FX7 KX MB1530FXW Memo ...
Page 271: ...271 KX MB1520FX7 KX MB1520FX8 KX MB1520FXW KX MB1530FX7 KX MB1530FXW Memo ...
Page 288: ...288 KX MB1520FX7 KX MB1520FX8 KX MB1520FXW KX MB1530FX7 KX MB1530FXW Memo ...
Page 294: ...294 KX MB1520FX7 KX MB1520FX8 KX MB1520FXW KX MB1530FX7 KX MB1530FXW Memo ...
Page 395: ...395 KX MB1520FX7 KX MB1520FX8 KX MB1520FXW KX MB1530FX7 KX MB1530FXW ...