Sharp AL-1651CS Service Manual page 105

d. ASIC (Signal table)
PIN
Signal Name IN/OUT Connected to
No.
1 cpudata7 IN/OUT CPU
2 cpudata6 IN/OUT CPU
3 cpudata5 IN/OUT CPU
4 cpudata4 IN/OUT CPU
5 VCC_AC Power
6 cpudata3 IN/OUT CPU
7 cpudata2 IN/OUT CPU
8 cpudata1 IN/OUT CPU
9 cpudata0 IN/OUT CPU
10 GND_AC Power
11 mircnt OUT
12 cpusync OUT
13 mem_intr
14 arb_intr OUT
15 VCC_core Power
16 cpu_ad8 IN
17 cpu_ad7 IN
18 cpu_ad6 IN
19 cpu_ad5 IN
20 GND_core Power
21 ram_clk_in IN
22 cpu_ad4 IN
23 cpu_ad3 IN
24 cpu_ad2 IN
25 cpu_ad1 IN
26 cpu_ad0 IN
27 xcpucs IN
28 sfclk IN
29 GND_core Power
30 xcpuwr IN
31 xcpurd IN
32 nrst IN
33 VCC_core Power
34 pfclk2 IN
35 clock_sw IN
36 GND_core Power
37 pfclk1_xout OUT
38 pfclk1 IN
39 VSSPLL2
40 VDDPLL2
41 VSS2
42 VDDI2
43 tm2_15m
44 xsync IN
45 GND_AC Power
46 xld OUT
47 xlend OUT
48 VCC_AC Power
49 mmd OUT
50 pmd OUT
51 tc OUT
52 gridl OUT
Description
CPU data bus
CPU data bus
CPU data bus
CPU data bus
CPU data bus
CPU data bus
CPU data bus
CPU data bus
Buffer IC SPF scanner select
signal
CPU CPU SYNC signal
Not used
CPU INTR signal
CPU CPU address bus
CPU CPU address bus
CPU CPU address bus
CPU CPU address bus
ASIC SDRAM clock on the
board
CPU CPU address bus
CPU CPU address bus
CPU CPU address bus
CPU CPU address bus
CPU CPU address bus
CPU CS signal
Oscillator Clock
CPU CPU write signal
CPU CPU read signal
SYSTEM SYSTEM RESET
RESET
Not used
Pull up
X-tal units VIDEO clock
X-tal units VIDEO clock
Pull up
Pull up
Pull up
Pull up
Pull up
LSU Horizontal sync
signal from LSU
(/SYNC)
LSU Laser drive signal
LSU Laser APC signal
Tr array IC Main motor control
signal. "H": Main
motor ON
I/O Polygon motor drive
Tr array IC Transfer charger
control signal. "H":ON
Tr array IC Main charger grid
control signal. "H": L
output
AL-1651CS ELECTRICAL SECTION 12 - 4
PIN
Signal Name IN/OUT Connected to
No.
53 mc OUT Tr array IC
54 bias OUT I/O
55 NC OUT I/O
56 vfmcnt OUT Tr array IC
57 VCC_core Power
58 vfm OUT Tr array IC
59 /FPOFF OUT I/O
60 GND_core Power
61 DEV DIR OUT I/O
62 spfclh OUT Tr array IC
63 spfrsol OUT Tr array IC
64 spfgsol OUT Tr array IC
65 spfpsol OUT Tr array IC
66 VCC_core Power
67 bias OUT Tr array IC
68 lden OUT Tr array IC
69 GND_AC Power
70 MRPS1 OUT I/O
71 MRPS2 OUT I/O
72 MRPS3 OUT I/O
73 CPFS1 OUT I/O
74 VCC_AC Power
75 CPFS2 OUT I/O
76 pr OUT I/O
77 hl OUT Tr array IC
78 GND_core Power
79 MPFS OUT I/O
80 miron OUT Buffer IC
81 spfon OUT Buffer IC
82 KEYSC1 OUT I/O
83 KEYSC2 OUT I/O
84 KEYSC3 OUT I/O
85 IMC ready OUT I/O
86 VCC_core Power
87 tmx OUT Buffer IC
88 tm OUT Buffer IC
89 op_data OUT Tr array IC
90 ope_latch OUT Tr array IC
91 GND_AC Power
Description
Main charger control
signal. "H": ON
HV bias drive
Not used
Ventilation fan
rotation speed control
signal. "H": High
speed, "L": Low
speed
Ventilation fan control
signal. "H": Fan ON
FAX poff signal
CRUM bus control
SPF/RSPF resist
roller clutch control
signal "H":ON
SPF/RSPF document
feed solenoid control
signal "H":ON
SPF/RSPF gate
solenoid control
signal "H":ON
SPF/RSPF document
transport solenoid
control signal "H":ON
DV bias control
signal. "H":ON
Laser circuit control
signal. "H": Laser
circuit ON
SPF current control
SPF current control
SPF current control
1st cassette pick up
solenoid
2nd cassette pick up
solenoid
Power relay control
Heater lamp control
signal. "H":ON
Multi-bypass solenoid
SPF scanner select
signal
SPF ON signal
Key sense control
Key sense control
Key sense control
IMC control
Toner motor control
signal
Toner motor control
signal
Operation circuit data
signal
Operation circuit latch
signal. Data take-in at
"L"