Sam4s ER-390 SERIES Service Manual page 78

11 Block Diagram
11-2 ER-390 / ER-390F
RECEIPT PRINTER (STM-210)
ON/OFF
VPRT
+8.5V
MOT DRIVE
LB1838
32.768Khz
SERIAL I/F
(RS232)
11-2
P/END
VPH LEVER
VPH
TPH_CLK, DATA
LATCH, nSTOBE
M30800SFP
RTC
FA16,17
nCS_EPROM
nCS2
FISICAL VOLT
DRIVE
12.5V 6.2V
FISICAL MEMORY B'D
512K/1M/2M
POWER
TRANS
VCC VPRT VDRV VDISP
+5V +8.5V +24V +30V
P/fail
DETECT
RESET
SPOOL
DRIVE
ADC nRST nINT0
CPU
M27C4000
XIN
ADD,nCS
FS781
14.7456Mhz
ADD,nCS
FISICAL I/F
82C55
FA FD
( 0:15 ) ( 0:7 )
SPOOL
MOTOR
DRAWER
BUZZER
DRAWER BUZZER
DRIVE DRIVE
A [0:19 ]
D [0:8 ]
EPROM SRAM
4MBITS
2MBITS
nCS
DECODE
74HC138
DECODE
74HC138
CS_KEYSCAN
KEY & MODE
SCAN RETURN
SCAN RETURN
KEY BOARD
MODE KEY
SAM4S ER-390 SERIES
REAR(10DIGIT)
FRONT(10DIGIT)
VFDDRIVE
SRAM
BUFFER
74HC541