BMC PS2000TL+, Service Manual

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5-2 Block Diagram
CPU HD64180Z
ROM 256K bytes
27C2001
RAM 512K bytes
TC54001CF
RAM 512K bytes
Drawer Drive &
Sensor Circuit
Back‑Up
Battery
Power Circuit
+24V,+5V,VFD
/RESET
/POWER FAIL
/RESET
/POWER FAIL
Real‑Time
Clock
RTC72423
Printer
Controller
M37732SAFP
ROM 32K bytes
Printer Driver
Circuit
MT245
Thermal R/J
Printer
4x20 LCD DOT
Display Module
VFD Numeric
Back Display
SCANNING
Multiplex
Circuit
DC/DC for
Back‑Light
VFD Driver
uPA80GR x 3
Control
Lock
Chashier
Key
Keyboard Unit
+24V
Vf
Vgrid
Fiscal Memory
Control Circuit
82C55 & HC273
Fiscal Memory
27C1001
I/O ADDRESS
DECODER GAL MEMORY ADDRESS
DECODER GAL
Sync
Serial
RS485 Driver
MAX491
RS232C Driver
MAX238
PORT0
PORT1
KEY & DISPLAY
SCANNING Circuit
Sync.
Port
Drawer A
Drawer B
Vf
Vgrid
+24V
VCC
/RESET
/POWER FAIL
/RESET
2