Metz mecablitz 40 MZ-2

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Summary

1. Preface

2. Block diagram

3.1. Principle of operation of the converter circuits

3.1.1. Main converter

Describes the function of the main converter circuit, transformer T501, and transistor Tr503.

3.1.2. Main converter voltage monitor

Details the monitoring circuit for flash capacitor voltage and protection against overcharging.

3.1.3. Auxiliary converter

Explains the auxiliary converter circuit driven by transistor Tr508 and its generated supply voltages.

4. Triggering the flash

4.1. IGBT

Introduces the IGBT as a new transistor type replacing thyristors for flash triggering and control.

4.2. Main reflector trigger circuit

Explains the circuit responsible for generating the high-voltage pulse to ignite the main flash tube.

4.3. Secondary reflector trigger circuit

Details the trigger circuit for the secondary reflector, ensuring its reliable ignition.

5. Program control

5.1. Microprocessor and periphery

Describes the microprocessor (IC301) and its control over various flashgun functions and peripherals.

5.1.1. LC display

Explains the function and display segments of the liquid crystal display driven by IC301.

5.1.2. Buttons and switches

Details how IC301 interrogates buttons and switches for user input and mode selection.

5.1.3. Power zoom

Describes the power zoom reflector with 6 positions and its control via IC301 and motor.

5.2. ASIC and periphery

5.2.1. Automatic light output control circuit

Details the automatic light output control circuit managed by IC504 for aperture and film speed.

6. Special flash functions

6.1. TTL flash control

Explains the operation of TTL flash control, including IGBT status and partial light control.

6.2. Cordless TTL flash control (Controller)

Describes cordless TTL flash control, where the controller flashgun emits a light pattern.

6.3. Manual flash mode

Details the manual flash mode, including trigger pulse, acknowledgement, and IGBT control.

6.3.1. Partial light output mode

Explains partial light output control as a time-based function for adjusting light levels.

6.4. Stroboscopic mode

Covers stroboscopic flash mode, its sequential flashes, and reduced IGBT 'off' time delay.

6.5. Autofocus measuring flash

Explains the autofocus measuring flash activated by the SCA adapter for AF systems.

7. SCA adapters

8. Technical Data

9. Service Notes

9.1. Service Test Set MB3000

Introduces the Service Test Set MB3000 as a mandatory tool for testing and adjustment.

9.2. Disassembly and Assembly

Provides instructions and safety notes for disassembling and assembling the flashgun unit.