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DRUM
SM 3-53 C267
C267 Service
Manual
3.9.7 INK DETECTION ADJUSTMENT
Using an Oscilloscope
Purpose:
To ensure that the CPU detects a no ink condition.
Standard:
4.0
±
0.2
μ
sec
NOTE:
1) Before attempting this procedure, wipe off the ink around the ink roller.
To do this, set SP2-10 (Ink Detection) to OFF, and feed paper until ink
ends.
2) This adjustment is required every time the MPU has been replaced.
3) Normally, the simple method is sufficient. But, the oscilloscope method
is more accurate. Use the oscilloscope method if you cannot adjust the
sensor to the required value with the simple method, or if ink flooding
problems occur after adjustment with the simple method.
1. Turn off the main switch and disconnect the power plug.
2. Remove the rear cover.
3. Connect the CH1 probe of an oscilloscope to TP25 (INK1), the CH2 probe to
TP23 (INK2). Select the 2-microsecond range on the oscilloscope.
4. Connect the power plug and turn on the main switch.
5. Make sure that the waveform is as shown in the illustration while the ink end
indicator lights.
6. If it is not correct, adjust the ON timing of the detection signal by turning VR1
beside the test pins.
NOTE:
1) If the ink detection off mode has been selected with SP2-10, do not
forget to return it to the default (detection on).
C267R912.WMF
CH1
(Standard signal)
CH2
(Detection signal)
4.0 ± 0.2
μ
sec
Summary of Contents for JP3000
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Page 166: ...INPUT OUTPUT CHECK MODE 4 30 C231 C237 C238 SM THIS PAGE IS INTENTIONALLY LEFT BLANK ...
Page 169: ...PREVENTIVE MAINTENANCE ...
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Page 173: ...REPLACEMENT AND ADJUSTMENT ...
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Page 192: ...MASTER FEED SECTION 6 18 C231 C237 C238 SM A Master making unit 2 screws C231R522 WMF A ...
Page 229: ...TAPE MARKER C532 ...
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Page 239: ...PCRIP EZ1 GDI QuickDraw Priport Controller User s Guide ...
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Page 511: ...INSTALLATION PROCEDURE SM 1 7 C267 C267 Service Manual C267I103 WMF C267I111 WMF C267I106 WMF ...
Page 574: ...DRUM C267 3 44 SM Installation C267R068 WMF C267R070 WMF Inside Outside A B ...
Page 578: ...DRUM C267 3 48 SM NOTE The side E with the part number printed on it must be on the top ...
Page 689: ...6 13 4 PRINT C267D911 WMF ...