SM | Service Manual |
e) Lamp Dimming
The LAMP DIMMING FUNCTION is installed in Model 4020 - 9020. It is used for dissolving for Economy and Standard LAMP settings. The main devices for dimming are the TRIAC, TRIAC CONTROL and Zero_Cross circuit on the POWER REGULATION PCB, the dissolve logic and the MICROCONTROLLER (MC) on the
MASTER PCB.
The TRIAC FUNCTION is controlled by the MICROCONTROLLER and its software, it works according to phase cut principals.
91VAC | Zero_Cross |
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Circuit |
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82VAC | Relay | Economy |
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| Driver |
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| Relay | Relay |
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| Driver |
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| Micro Controller |
L2 | L1 |
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| M MirrorMotor | Mirror |
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| Motor |
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| Driver |
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| Dual Lamp |
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| Modul |
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| Lamp | Lamp_curr |
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| Current | SOFTWARE TRIGGER | Software | |
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| DATA | Control |
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| Dissolve |
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| SYNC |
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Lamp Current |
| Logic | GND |
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Detection and |
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Switch off |
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Power Regulation Board | Master Board | |||
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Kodak AG, Stuttgart | 03/98 |
