Epson Photo PC-750Z, Service Manual, Page: 24 / 94

EPSON PhotoPC-750Z Revision A
Operating principles Board Component 24
2.1 Board Component
Majority of the EPSON PhotoPC-750Z consists of the electric circuit
boards. The figure below shows those boards and explains their
functions.
Figure 2-1. Board Location
Table 2-1. Functions of each board
C A 2 B o a r d
P W 1 B o a r d
T B 2 B o a r d
T B 1 B o a r d
S Y 1 B o a r d
C A 1 B o a r d
Name Function
SY1
4-bit microprocessor as the central system is mounted on
the back of this board. Power supply/Stop control, STROBE
charge/discharge control, Clock control and back up for
setting and internal communication bus control are handled
by this board.
CA1
CCD is directly soldered on this board. Lens with zoom is
fixed on the CCD. H/V Driver to drive the CCD, CDS/AGC to
correct the image and A/D converter circuit to transfer the
data to the internal ASIC are mounted on this board.
TB1
This board takes power from the batteries. Shutter switch is
mounted on this board.
ST1
This board generates power supply for digital and analog.
Also, electrolytic condenser for flash, connectors for AC
adapter and for video output are mounted on this board.
CA2
This board has LCD monitor control, optional memory flash
card control, and also works as the internal control system
for the photographic processing.
TB1
Small board mounted on the LED for Self-Timer. It is all
right if this board is not connected during adjustment and
operation check.
W A R N I N G ST1 board has a danger of getting electric shock
because of C5412. Hold the edges of this board and
never touch the board surface when you handle this
board. DIscharge the charged energy of C5412 for
safety before handling this board. (See Chapter 4 for
more details)