Read Sharp AR-155 (serv.man13) Service Manual online
The FAX data stored in the main memory are transmitted to LC8213,
where they are converted into bit map data, which are sent to ASIC
and transmitted to the FAX/PCL MCU PWB for printing.
where they are converted into bit map data, which are sent to ASIC
and transmitted to the FAX/PCL MCU PWB for printing.
LZ9FH19 receives image data from FAX/PCL MCU and stores in the
scan data memory. The mage data are transmitted to LC52113 and
converted into MMR format. The converted data are stored in the main
memory then read by FX200 and transmitted to the public line.
scan data memory. The mage data are transmitted to LC52113 and
converted into MMR format. The converted data are stored in the main
memory then read by FX200 and transmitted to the public line.
6. LCD circuit (AR-F151 only)
A. Outline
The LCD PWB is composed of the 4-bit, single-chip microprocessor,
HD404344, the LCD panel, the key SW block, the LED circuit, and the
shunt regulator circuit. The block diagram is shown below.
The LCD PWB is composed of the key scan process block, the serial
I/O process block, the LED lighting process block, the LCD display
process block, the reset process block, the oscillation circuit, and the
LCD power circuit. These circuits are driven by 5V, and only the LCD
circuit is driven by 12V to generate 5.2V as the LCD display drive volt-
age.
HD404344, the LCD panel, the key SW block, the LED circuit, and the
shunt regulator circuit. The block diagram is shown below.
The LCD PWB is composed of the key scan process block, the serial
I/O process block, the LED lighting process block, the LCD display
process block, the reset process block, the oscillation circuit, and the
LCD power circuit. These circuits are driven by 5V, and only the LCD
circuit is driven by 12V to generate 5.2V as the LCD display drive volt-
age.
B. CPU pin table
Pin No.
Signal name
Input/Output
1
LED1
Output
2
LED2
Output
3
LCDRS
Input/Output
4
LCDRW
Input/Output
5
LCDB4
Input/Output
6
LCDB5
Input/Output
7
LCDB6
Input/Output
8
LCDB7
Input/Output
9
OSC1
Input
10
OSC2
Output
11
GND
–
12
KEYCOM1
Output
13
KEYCOM2
Output
14
KEYCOM3
Output
15
KEYCOM4
Output
16
V
CC
–
17
TEST
Input
18
/PANEL RESET
Input
19
/SCK
Input
20
SID
Input
21
SOD
Output
22
LCDE
Output
23
KEYCOM9
Output
24
KEYCOM8
Output
25
LED3
Output
26
KEYCOM7
Output
27
KEYCOM6
Output
28
KEYCOM5
Output
FX164
FX200
NCU
Main Memory
LC8213
ASIC
Buf. Mem.
Prog.ROM
Image.
Memory
CPU Bus
PSTN
Compressed
Image
Image
Image Bus
(FAX reception)
Print operation
FAX/PCL
MCU PWB
MCU PWB
LZ9FH19
FAX/PCL
MCU PWB
MCU PWB
SCAN
DATA
Memory
DATA
Memory
LCD PWB
FX164
FX200
NCU
Main Memory
ASIC
Buf. Mem.
Prog.ROM
Image.
Memory
CPU Bus
PSTN
Compressed
Image
Image
Image Bus
LC8213
(FAX transmission)
FAX/PCL
MCU PWB
MCU PWB
FAX/PCL
MCU PWB
MCU PWB
LZ9FH19
SCAN
DATA
Memory
DATA
Memory
LCD PWB
Key scan section
LED circuit section
LCD power circuit
LCD panel
Oscillation
circuit
circuit
FAX board
PWB
PWB
LCD PWB
CPU
HD404344
HD404344
SOD
SCK
SIO
RESET
SIO
RESET
AR-F151
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