Read Sharp AL-1622 (serv.man16) Service Manual online
AL-1611/AL-1622
ELECTRICAL SECTION
13 – 4
68
VSS
POW
Ground pin
69
/CS5
OUT
Area 5 chip select
(Not used)
L: Select
70
/DREQ1
/DREQ1
IN
DMAC channel 1 external
request
request
Lifter and separator motor
acceleration/reduction con-
trol
acceleration/reduction con-
trol
0: Request effective
71
P63
POFFR
OUT
General port 63
Power off relay control
H: AC switch OFF
72
P27
/ESPAGE
IN
General port 27
ERDH option page signal
detection
detection
0: Page effective
73
P26
/PCLPAGE
IN
General port 26
PCl operation page signal
detection
detection
0: Page effective
74
P25
/FAXPAGE
IN
General port 25
F A X o p t i o n p a g e s i g n a l
detection
detection
0: Page effective
75
P24
/READY
OUT
General port 24
Machine ready signal
L: Machine ready state
76
P23
/PWOFF
OUT
General port 23
Power off signal
L: Power interruption detect-
ing state
ing state
77
P22
/SCANSP
OUT
General port 22
Scan stop signal
L: Scanning operation inter-
ruption
ruption
78
P21
/SCANST
OUT
General port 21
Scan start signal
L: Scanning operation effec-
tive
tive
79
P20
/PRSTART
OUT
General port 20
Print start signal
L: Printing effective
80
/WDTOVR
OUT
Watch dog timer overflow
System reset
L: System restart
81
/RES
IN
System reset
System reset
0: Power on reset
82
NMI
IN
Non-maskable interruption
request
request
(Not used)
1: Level fixing input
83
/STBY
IN
Stand-by
(Not used)
1: Level fixing input
84
VCC
POW
Power pin
85
XTAL
IN
Oscillation pin
Oscillator (19.6608MHz)
86
EXTAL
OUT
Oscillation pin
Oscillator (19.6608MHz)
87
VSS
POW
Ground pin
88
â
CPUCLK
OUT
System clock
System clock
19.6608MHz clock output
89
VCC
POW
Power pin
90
/AS
/AS
OUT
Address strobe
System bus
L: Address effective
91
/RD
/RD
OUT
Lead strobe
System bus
L: Lead effective
92
/HWR
/HWR
OUT
Highlight enable
System bus
L: Highlight effective
93
/LWR
/LWR
OUT
Row write enable
System bus
L: Row write effective
94
PF2
/TMEN
OUT
General port F2
Toner motor drive control
L: Rotating
95
PF1
PMD
OUT
General port F1
Polygon motor drive control
H: Rotating
96
PF0
MMD
OUT
General port F0
Main motor drive control
H: Rotating
97
P50
/MMRDY
IN
General port 50
Main motor ready signal
0: Rotation stable state
98
P51
/PMRDY
IN
General port 51
Polygon motor ready signal
0: Rotation stable state
99
VSS
POW
Ground pin
100
VSS
POW
Ground pin
101
P52
/PRLINE
OUT
General port 52
Print line signal
L: Printing effective
102
P53
/SCLINE
OUT
General port 53
Scan line signal
L: Scanning operation effec-
tive
tive
103
AVCC
POW
Analog power pin
104
VREF
POW
Analog reference pin
105
AN0
RTH
IN
Analog input 0
Fusing thermistor tempera-
ture detection
ture detection
106
AN1
IN
Analog input 1
(Not used)
107
AN2
IN
Analog input 2
(Not used)
108
AN3
TONER
IN
Analog input 3
Toner sensor
5V: Toner empty
109
AN4
IN
Analog input 4
(Not used)
110
AN5
IN
Analog input 5
(Not used)
111
DA0
DA0
OUT
Analog output 0
CCD reference + side
Pin No.
Pin name
Signal name
I/O
Function
Purpose
Descriptions
(Pin descriptions) IN: Input pin
OUT: Output pin
BIDIR: Bi-directional pin
ODN: Open drain output pin
TR1: 3-state output pin
POW: Power pin
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