AGFA d-lab.3 Digital Compact Lab
AGFA d-lab.3 Digital Compact Lab AGFA d-lab.3 Digital Compact Lab
Scanner Repair Prescanner / Scanner − Transport, positioning (APL = automatic positioning logic, slip correction) and exposure of the inserted film for the Prescan and the main scan − Definition of the film and negative-specific exposure data (TFS) as well as of the exposure time for the main scan by the Prescanner − Digitising of the frames for the main scan by the CCD (exposure of the frame on the CCD) − The Prescanner is used to define the specific properties of the film prior to the main scan, like position and colour / density values of each individual frame / slide. − On this basis, a digital image of the frame / slide is created by the CCD unit (Main-Scan) and sent to the Main PC for image processing (image processing board). Prescanner Structure: The Prescanner has a density line and three colour lines fitted with photodiodes. Each colour line is 1 mm wide and is 8 mm away from the other colour lines. The width of the density line is reduced by a shutter in the paper filter (ensures higher optical resolution). The structure of the lines for RGB is identical: They consist of 32 photodiodes, the first four and the last four being switched in pairs. This way, there are 24 individually addressable photodiodes that can be used as a function of the film size. The line for the density consists of 32 photodiodes switched in groups (as a function of the film size). The photodiodes are connected to amplifiers after they have been switched together which have the following functions: 4.3.14 2001-01-02 /PN 9009 AGFA d-lab.3
Repair Scanner Amplifiers, functions: − Setting the optimum amplification for the check of the photodiodes. For optimum utilisation of the modulation of the AD converter, the amplification factor for the current / voltage conversion can be modified. − Converting the current of the photodiodes into a voltage. Only the current of a photodiode is proportional to the infalling light. For this reason, the light must be measured here. The AD converter switched behind can only measure voltages. The amplification of the current/voltage converter is adjustable by the film drive processor. Functions: − The Prescanner is used to analyse the frames prior to the actual exposure and main scan procedure in the d-lab.3: For the Prescan, the Prescanner is moved into the light path and the film is passed over the Prescanner. For single frames, the Prescanner is put under the stationary frame. The film is digitised at low resolution while the colour and density values of the entire film including the border are collected. − The digitised data is transmitted to the FL Controller where the required integration times are found for each colour depending on: − the density of the individual frame − the colour corrections as a function of the film mask − the colour corrections as a function of a general colour cast on the film, e.g. on artificial light shots − Reading the DX code − Detecting the image boundaries for the subsequent image positioning − Exact image positioning during the film transport AGFA d-lab.3 2001-01-02 /PN 9009 4.3.15
- Page 85 and 86: Scanner Repair Functional Descripti
- Page 87: Scanner Repair ■ 4.iv 2001-01-02
- Page 91 and 92: Repair Scanner Block Circuit Diagra
- Page 93 and 94: Repair Scanner Image Recording dlab
- Page 95 and 96: Repair Scanner Scanner Motherboard:
- Page 97 and 98: Repair Scanner Driver Sensor Board
- Page 99 and 100: Repair Scanner Driver Sensor Board:
- Page 101 and 102: Repair Scanner FD/SD Output Stage d
- Page 103 and 104: Repair Scanner FL Controller: LEDs
- Page 105 and 106: Repair Scanner Algorithm/Interface
- Page 107 and 108: Repair Scanner CG Controller dlab08
- Page 109 and 110: Repair Scanner CCD Board dlabr084e
- Page 111 and 112: Repair Scanner Prescanner dlab091e
- Page 115 and 116: Repair Scanner Signal Lists Descrip
- Page 117 and 118: Repair Scanner Mirror Box MB No. De
- Page 119 and 120: Repair Scanner Activation of Motors
- Page 123 and 124: Repair Scanner Functional Descripti
- Page 125 and 126: Repair Scanner Scanner Optic dlab14
- Page 127 and 128: Repair Scanner Main Scan Cycle Filt
- Page 129 and 130: Repair Scanner Filter Wheel LH_MO01
- Page 131 and 132: Repair Scanner The motor is energis
- Page 133 and 134: Repair Scanner Auxiliary Shutter (D
- Page 135: Repair Scanner Position Auxiliary D
- Page 139 and 140: Repair Scanner Lenses − Fixed foc
- Page 141 and 142: Repair Scanner Functions and Proper
- Page 143 and 144: Repair Scanner Film Drive NC_MO01 T
- Page 145 and 146: Repair Scanner Control The Motherbo
- Page 147 and 148: Repair Scanner FD/SD Output Stage (
- Page 149 and 150: Repair Scanner Functions: − Contr
- Page 151 and 152: Repair Scanner The TFS is not perfo
- Page 153 and 154: Repair Scanner CG Controller (CCD G
- Page 155 and 156: Repair Scanner Driver Sensor Board
- Page 157 and 158: Repair Scanner I 2 C Bus The 2-Bit
- Page 161 and 162: Repair Scanner Repair / Adjustments
- Page 163 and 164: Repair Scanner Shutter Toothed belt
- Page 165 and 166: Repair Scanner − Check the belt d
- Page 167 and 168: Repair Scanner 2-Film Feeder Dismou
- Page 169 and 170: Repair Scanner Installing the Feede
- Page 171 and 172: Repair Scanner Feeder rocker Feeler
- Page 173 and 174: Repair Scanner − Light sensor act
- Page 175 and 176: Repair Scanner Changing the Lifting
- Page 177 and 178: Repair Scanner 1a Cover plate A 1b
- Page 179 and 180: Repair Scanner Changing the Light S
- Page 181 and 182: Repair Scanner Replacing the Zoom /
- Page 183 and 184: Repair Scanner Precanner Adjustment
- Page 185 and 186: Repair Scanner Remove the following
Scanner<br />
Repair<br />
Prescanner / Scanner<br />
− Transport, positioning (APL = automatic<br />
positioning logic, slip correction) and exposure of<br />
the inserted film for the Prescan and the main<br />
scan<br />
− Definition of the film and negative-specific<br />
exposure data (TFS) as well as of the exposure<br />
time for the main scan by the Prescanner<br />
− Digitising of the frames for the main scan by the<br />
CCD (exposure of the frame on the CCD)<br />
− The Prescanner is used to define the specific<br />
properties of the film prior to the main scan, like<br />
position and colour / density values of each<br />
individual frame / slide.<br />
− On this basis, a digital image of the frame / slide<br />
is created by the CCD unit (Main-Scan) and sent<br />
to the Main PC for image processing (image<br />
processing board).<br />
Prescanner<br />
Structure:<br />
The Prescanner has a density line and three colour<br />
lines fitted with photodiodes. Each colour line is<br />
1 mm wide and is 8 mm away from the other colour<br />
lines. The width of the density line is reduced by a<br />
shutter in the paper filter (ensures higher optical<br />
resolution).<br />
The structure of the lines for RGB is identical:<br />
They consist of 32 photodiodes, the first four and<br />
the last four being switched in pairs. This way, there<br />
are 24 individually addressable photodiodes that can<br />
be used as a function of the film size.<br />
The line for the density consists of 32 photodiodes<br />
switched in groups (as a function of the film size).<br />
The photodiodes are connected to amplifiers after<br />
they have been switched together which have the<br />
following functions:<br />
4.3.14 2001-01-02 /PN 9009 <strong>AGFA</strong> d-<strong>lab.3</strong>
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