Canon PC960 Specifikace stáhnout pdf (Strana 111)

100

101

CHAPTER 4 IMAGE FORMATION SYSTEM

1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

4-17

Figure 4-115

Copy Start key

STBY INTR AER

SCFW SCFW

SCRV

LSTR

STBY

Main motor (M1)

Scanner / lens drive

motor (M2)

AE signal (AE)

Scanning lamp (LA1)

SCRV

Figure 4-114

68.8mm

(approx.)

23.5mm

(approx.)

5.8mm

(approx.)

37.7mm

(approx.)

Middle of

original

: Area read by AE sensor

2. Operations

When measuring the density of an original, the scanner turns on the scanning lamp, and moves

to a point 115 mm from the home position. At this time, the AE sensor reads the level of light

reflected by the area shown in Figure 4-112, and sends the AE signal (AE) to the DC controller

PCB.

In response, the DC controller PCB sends the developing DCON signal (serial communica-

tion) to the composite power supply PCB according to the level of the AE signal. The microproces-

sor (Q900) on the composite power supply PCB controls the level of the DC bias applied to the

developing cylinder based on the level of this signal.

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Canon PC960 Specifikace Strana 111

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