SM 2547-1

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

Zero_Cross

 

 

 

 

 

Circuit

 

 

 

 

 

 

 

82VAC

Relay

Economy

 

 

 

Driver

 

 

 

 

Relay

Relay

 

 

 

Driver

 

 

Micro Controller

L2

L1

 

 

 

 

 

 

M MirrorMotor

Mirror

 

 

 

Motor

 

 

 

 

Driver

 

 

 

Dual Lamp

 

 

 

 

Modul

 

 

 

 

Lamp

Lamp_curr

 

 

 

Current

SOFTWARE TRIGGER

Software

 

 

Lamp

 

 

 

 

 

 

 

DATA

Control

 

 

Dissolve

 

 

 

SYNC

 

Lamp Current

 

Logic

GND

 

 

 

 

 

 

 

 

Detection and

 

 

 

 

Switch off

 

 

 

 

Power Regulation Board

Master Board

 

figure 3-10

 

 

 

Kodak AG, Stuttgart

3-13

03/98

Page 49
Image 49
Kodak (9020/CINE), 7020, 5020, 4020 service manual Micro Controller, Lamp Dimming

(9020/CINE), 5020, 9020, 7020, 4020 specifications

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