Epson PhotoPC600, Руководство по обслуживанию, Страница: 112 / 116

PhotoPC600
Chapter7 Appendix
Rev. A 7-2
7.1.2 Connector Signals
This section shows connector signals, which connects various boards.
CHECK POINT
ü ü ü ü
n
n n
n
Since the available supply of fine electric parts on the boards is
limited, connectors shown here is minimum necessity in order to
distinguish the defective unit.
7.1.2.1 Major connector signals on the SY1 board
Table 7-1. SY-CN302
Pin-No. Signal Name I/O Function
1 SCAN IN0 I Key matrix 0 input (Periodically perform auto scan)
2 SCAN OUT2A O Key matrix 2A output (Periodically auto output)
Table 7-2. SY1-CN303
Pin-No. Signal Name I/O Function
1 SCAN IN I Power supply voltage for rotary switch (power
switch) on/off detector.
2 SCAN OUT O Rotary switch (power switch)on/off signal output.
Table 7-3. SY1-CN305
Pin-No. Signal Name I/O Function
1 I Power supply line
2
BATTERY
-
- Neutral
Table 7-4. SY1-CN304
Pin-No. Signal Name I/O Function
1 SCAN OUT 3B O Key matrix 3B output
2 SCAN OUT 2B O Key matrix 2B output
3 SCAN OUT 1B O Key matrix 1B output
4 SCAN IN1 I Key matrix 1 input
5 SCAN IN0 I Key matrix 0 input
6 SCAN OUT1A O Key matrix 1A output