Drawer Circuit - Olivetti ECR 7900 Service Manual

3-10. DRAWER CIRCUIT

The solenoid for a drawer is activated using the signal P110 from the CPU.
This signal is normally Low, and goes High to cause the drawer to run. When P110 is High, Q2 is on.
Current flow through the transistor cause the collector to be held Low, near grand potential.
(1)
DRW_O N
DRW_ON
Trouble shooting
- Drawer remains opened. (Drawer does not close.)
Check the voltage at point (1)
DC +3.3V - - - Replace Main board.
0V - - - Replace the Drawer unit.
- Drawer remains closed. (Drawer does not open)
Check whether or not the drawer opens by emergency lever.
If drawer opens - - - It should not be considered a mechanic problem.
If drawer does not open - - - It should be considered a mechanic problem.
34
VDRW
1S R154 -400
R1 05
B
4.7 K
R1 08
10K
PG
Check the voltage at point (1)
Replace the drawer unit.
ECR 7900 Service Manual
D1
Q2
2S D986
PG
CN5
1
2
3
B3 P-SHF-1A A
Y108540-8