Sy 1 Circuit Description; Configuration And Functions - Epson PhotoPC3100Z Service Manual

PhotoPC 3100Z
TRIGGER CIRCUIT
When a TRIG signal is input to the trigger circuit, D5405 switches on, a high-voltage
pulse of several kilo volts is generated inside the trigger circuit, and this pulse is then
applied to the light emitting part.
LIGHT EMITTING ELEMENT
When the high-voltage pulse form the trigger circuit is applied to the light emitting
part, current flows to the light emitting element and light is emitted.
W A R N I N G
Beware of electric shocks.
Special attention is needed because high voltage is generated around
C5412 and xenon lamp terminals.
Operating Principles

2.2.4 SY 1 Circuit Description

2.2.4.1 Configuration and Functions

For the overall configuration of the SY1 circuit board, refer to the block diagram
below.
Figure 2-15. SY1 Circuit Board Block Diagram
The configuration of the SY1 circuit board centers around a 8-bit microprocessor
(IC301). The 8-bit microprocessor handles the following functions:1. Operation key
input, 2. Mode LCD display, 3. Clock control, 4. Power ON/OFF, 5. Strobe charge
control.
Circuit
Revision A
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