Sharp AL-1566 (serv.man15) Service Manual ▷ View online
AL-1556/1566 ELECTRICAL SECTION 12 - 5
92
op_clk
OUT
Tr array IC
Operation circuit
clock signal
clock signal
93
VCC_AC
Power
94
scanstop
IN
CPU
Scan stop signal
95
testpin0
IN
TEST
TEST
96
testmode_on
IN
TEST
TEST
97
ie1284_stb
IN
I/F board
connector
connector
/STB signal
(IEEE1284
communication port)
(IEEE1284
communication port)
98
ie1284_autofd IN
I/F board
connector
connector
/AUTOFD signal
(IEEE1284
communication port)
(IEEE1284
communication port)
99
VCC_core
Power
100 ie1284_slctin
IN
I/F board
connector
connector
/SLCTIN signal
(IEEE1284
communication port)
(IEEE1284
communication port)
101 ie1284_init
IN
I/F board
connector
connector
/INIT signal
(IEEE1284
communication port)
(IEEE1284
communication port)
102 ie1284_slct
OUT
I/F board
connector
connector
SLCT signal
(IEEE1284
communication port)
(IEEE1284
communication port)
103 GND_core
Power
104 ie1284_pe
OUT
I/F board
connector
connector
PE signal (IEEE1284
communication port)
communication port)
105 ie1284_busy
OUT
I/F board
connector
connector
BUSY signal
(IEEE1284
communication port)
(IEEE1284
communication port)
106 ie1284_ack
OUT
I/F board
connector
connector
/ACK signal
(IEEE1284
communication port)
(IEEE1284
communication port)
107 ie1284_fault
OUT
I/F board
connector
connector
/FAULT signal
(IEEE1284
communication port)
(IEEE1284
communication port)
108 VCC_core
Power
109 ie1284_rev
OUT
I/F board
connector
connector
/REV signal
(IEEE1284
communication port)
(IEEE1284
communication port)
110 ie1284_parad7 IN/OUT I/F board
connector
DATA bus (IEEE1284
communication port)
communication port)
111 ie1284_parad6 IN/OUT I/F board
connector
DATA bus (IEEE1284
communication port)
communication port)
112 ie1284_parad5 IN/OUT I/F board
connector
DATA bus (IEEE1284
communication port)
communication port)
113 ie1284_parad4 IN/OUT I/F board
connector
DATA bus (IEEE1284
communication port)
communication port)
114 ie1284_parad3 IN/OUT I/F board
connector
DATA bus (IEEE1284
communication port)
communication port)
115 ie1284_parad2 IN/OUT I/F board
connector
DATA bus (IEEE1284
communication port)
communication port)
116 VCC_AC
Power
117 ie1284_parad1 IN/OUT I/F board
connector
DATA bus (IEEE1284
communication port)
communication port)
118 ie1284_parad0 IN/OUT I/F board
connector
DATA bus (IEEE1284
communication port)
communication port)
119 suspend
OUT
I/F board
connector
connector
SUSPEND signal
(USB communication
port)
(USB communication
port)
120 GND_AC
Power
121 oen
OUT
I/F board
connector
connector
OEN signal (USB
communication port)
communication port)
122 vmout
OUT
I/F board
connector
connector
VMOUT signal (USB
communication port)
communication port)
123 vpout
OUT
I/F board
connector
connector
VPOUT signal (USB
communication port)
communication port)
124 GND_core
Power
PIN
No.
Signal Name
IN/OUT Connected to
Description
125 vmin
IN
I/F board
connector
connector
VMIN signal (USB
communication port)
communication port)
126 vpin
IN
I/F board
connector
connector
VPIN signal (USB
communication port)
communication port)
127 rcv
IN
I/F board
connector
connector
RCV signal (USB
communication port)
communication port)
128 scanst
IN
CPU
Scan start signal
129 printst
IN
Start signal
Start signal
130 receptst
IN
Start signal
Start signal
131 transst
IN
CPU
Data transfer start
signal
signal
132 VCC_core
Power
133 dci_dat7
IN
E-SORT
(OA982)
(OA982)
E-SORT data bus
134 dci_dat6
IN
E-SORT
(OA982)
(OA982)
E-SORT data bus
135 dci_dat5
IN
E-SORT
(OA982)
(OA982)
E-SORT data bus
136 dci_dat4
IN
E-SORT
(OA982)
(OA982)
E-SORT data bus
137 dci_dat3
IN
E-SORT
(OA982)
(OA982)
E-SORT data bus
138 dci_dat2
IN
E-SORT
(OA982)
(OA982)
E-SORT data bus
139 dci_dat1
IN
E-SORT
(OA982)
(OA982)
E-SORT data bus
140 dci_dat0
IN
E-SORT
(OA982)
(OA982)
E-SORT data bus
141 GND_core
Power
142 out_dc_req
IN
E-SORT
(OA982)
(OA982)
E-SORT control
signal
signal
143 in_dc_req
IN
E-SORT
(OA982)
(OA982)
E-SORTcontrol signal
144 GND_AC
Power
145 out_dc_ack
OUT
E-SORT
(OA982)
(OA982)
E-SORT control
signal
signal
146 out_dc_wt
OUT
E-SORT
(OA982)
(OA982)
E-SORT control
signal
signal
147 VCC_AC
Power
148 in_dc_ack
OUT
E-SORT
(OA982)
(OA982)
E-SORTcontrol signal
149 in_dc_cs
OUT
E-SORT
(OA982)
(OA982)
E-SORTcontrol signal
150 dco_dat7
OUT
E-SORT
(OA982)
(OA982)
E-SORT data bus
151 dco_dat6
OUT
E-SORT
(OA982)
(OA982)
E-SORT data bus
152 dco_dat5
OUT
E-SORT
(OA982)
(OA982)
E-SORT data bus
153 dco_dat4
OUT
E-SORT
(OA982)
(OA982)
E-SORT data bus
154 dco_dat3
OUT
E-SORT
(OA982)
(OA982)
E-SORT data bus
155 VCC_AC
Power
156 dco_dat2
OUT
E-SORT
(OA982)
(OA982)
E-SORT data bus
157 dco_dat1
OUT
E-SORT
(OA982)
(OA982)
E-SORT data bus
158 dco_dat0
OUT
E-SORT
(OA982)
(OA982)
E-SORT data bus
159 hsync
FAX
FAX
160 GND_core
Power
161 out_req
Not used
162 in_ack
Not used
163 in_cs
Not used
164 GND_AC
Power
PIN
No.
Signal Name
IN/OUT Connected to
Description
AL-1556/1566 ELECTRICAL SECTION 12 - 6
165 mdat00
Not used
166 mdat01
Not used
167 mdat02
Not used
168 mdat03
Not used
169 VCC_core
Power
170 mdat04
Not used
171 mdat05
Not used
172 mdat06
Not used
173 GND_core
Power
174 mdat07
Not used
175 mdat08
Not used
176 mdat09
Not used
177 VCC_AC
Power
178 mdat10
Not used
179 mdat11
Not used
180 mdat12
Not used
181 VCC_core
Power
182 mdat13
Not used
183 mdat14
Not used
184 mdat15
Not used
185 GND_AC
Power
186 pcl_s_print
Not used
187 fax_s_print
Not used
188 es_s_print
Not used
189 out_ack
Not used
190 out_cs
Not used
191 in_req
Not used
192 VCC_core
Power
193 TCK
JTAG
Not used
194 TMS
JTAG
Not used
195 TRSTA
JTAG
Not used
196 TDI
JTAG
Not used
197 TDO
JTAG
Not used
198 GND_core
Power
199 afp_vsmp
OUT
CCD PWB
AFE control signal
200 ccd_tg
OUT
CCD PWB
CCD control signal
201 ccdrs
OUT
CCD PWB
CCD control signal
202 afp_bsmp
OUT
CCD PWB
AFE control signal
203 ccdcp
OUT
CCD PWB
CCD control signal
204 afe_sdata
IN
CCD PWB
AD's serial data
205 ccd_ph2
OUT
CCD PWB
CCD control signal
206 ccd_ph1
OUT
CCD PWB
CCD control signal
207 afp_afesen
OUT
CCD PWB
AFE control signal
208 GND_core
Power
209 afp_adcclk
OUT
CCD PWB
AFE control signal
210 VCC_core
Power
211 afp_afesck
OUT
CCD PWB
AFE control signal
212 GND_AC
Power
213 afp_data7
IN
CCD PWB
Image scan data
214 afp_data6
IN
CCD PWB
Image scan data
215 afp_data5
IN
CCD PWB
Image scan data
216 afp_data4
IN
CCD PWB
Image scan data
217 afp_data3
IN
CCD PWB
Image scan data
218 afp_data2
IN
CCD PWB
Image scan data
219 afp_data1
IN
CCD PWB
Image scan data
220 afp_data0
IN
CCD PWB
Image scan data
221 VCC_AC
Power
222 cl
OUT
Logic IC
Copy lamp control
signal
signal
223 GND_core
Power
224 mtr_y3
OUT
I/O
Carriage motor
current control signal
current control signal
225 mtr_y2
OUT
Tr array IC
Carriage motor
current control signal
current control signal
PIN
No.
Signal Name
IN/OUT Connected to
Description
226 mtr_y1
OUT
Tr array IC
Carriage motor
current control signal
current control signal
227 VCC_core
Power
228 mtr_phase2
OUT
Motor driver
Carriage motor
control signal
control signal
229 mtr_i02
OUT
Motor driver
Carriage motor
control signal
control signal
230 mtr_i12
OUT
Motor driver
Carriage motor
control signal
control signal
231 mtr_i22
OUT
Motor driver
Carriage motor
control signal
control signal
232 mtr_phase1
OUT
Motor driver
Carriage motor
control signal
control signal
233 mtr_i01
OUT
Motor driver
Carriage motor
control signal
control signal
234 mtr_i11
OUT
Motor driver
Carriage motor
control signal
control signal
235 mtr_i21
OUT
Motor driver
Carriage motor
control signal
control signal
236 GND_AC
Power
237 ram_mad3
OUT
SDRAM
SDRAM (Image
process page
memory) address bus
process page
memory) address bus
238 ram_mad2
OUT
SDRAM
SDRAM (Image
process page
memory) address bus
process page
memory) address bus
239 GND_core
Power
240 ram_mad1
OUT
SDRAM
SDRAM (Image
process page
memory) address bus
process page
memory) address bus
241 ram_mad0
OUT
SDRAM
SDRAM (Image
process page
memory) address bus
process page
memory) address bus
242 ram_mad10
OUT
SDRAM
SDRAM (Image
process page
memory) address bus
process page
memory) address bus
243 VCC_core
Power
244 ram_banks1
OUT
SDRAM
SDRAM (Image
process page
memory) BANK
signal
process page
memory) BANK
signal
245 ram_banks0
OUT
SDRAM
SDRAM (Image
process page
memory) BANK
signal
process page
memory) BANK
signal
246 xram_cs
OUT
SDRAM (Image
process page
memory) CS signal
process page
memory) CS signal
247 xram_ras
OUT
SDRAM
SDRAM (Image
process page
memory) RAS signal
process page
memory) RAS signal
248 xram_cas
OUT
SDRAM
SDRAM (Image
process page
memory) CAS signal
process page
memory) CAS signal
249 VCC_AC
Power
250 xram_wde
OUT
SDRAM
SDRAM (Image
process page
memory) WDE signal
process page
memory) WDE signal
251 ram_dqm0
OUT
SDRAM
SDRAM (Image
process page
memory) DQM signal
process page
memory) DQM signal
252 GND_AC
Power
253 ram_data7
IN/OUT SDRAM
SDRAM (Image
process page
memory) data bus
process page
memory) data bus
PIN
No.
Signal Name
IN/OUT Connected to
Description
AL-1556/1566 ELECTRICAL SECTION 12 - 7
(4) Reset circuit
This circuit detects ON/OFF of the power source, and controls start/
stop of each circuit. The voltage of 3.3V in the MCU PWB is detected
by the reset IC to generate the reset signal.
stop of each circuit. The voltage of 3.3V in the MCU PWB is detected
by the reset IC to generate the reset signal.
When the power voltage reaches the specified level, each circuit is
operated, but stopped before the power voltage falls below the speci-
fied level in order to protect against malfunction of the circuit. The
CPU/Flash ROM is reset by the power reset circuit, and system reset
of ASIC, OA982, FAX, and NIC is generated from the CPU (general-
purpose port output).
operated, but stopped before the power voltage falls below the speci-
fied level in order to protect against malfunction of the circuit. The
CPU/Flash ROM is reset by the power reset circuit, and system reset
of ASIC, OA982, FAX, and NIC is generated from the CPU (general-
purpose port output).
254 ram_data6
IN/OUT SDRAM
SDRAM (Image
process page
memory) data bus
process page
memory) data bus
255 ram_data5
IN/OUT SDRAM
SDRAM (Image
process page
memory) data bus
process page
memory) data bus
256 ram_data4
IN/OUT SDRAM
SDRAM (Image
process page
memory) data bus
process page
memory) data bus
257 GND_core
Power
258 ram_data3
IN/OUT SDRAM
SDRAM (Image
process page
memory) data bus
process page
memory) data bus
259 ram_data2
IN/OUT SDRAM
SDRAM (Image
process page
memory) data bus
process page
memory) data bus
260 ram_data1
IN/OUT SDRAM
SDRAM (Image
process page
memory) data bus
process page
memory) data bus
261 ram_data0
IN/OUT SDRAM
SDRAM (Image
process page
memory) data bus
process page
memory) data bus
262 GND_AC
Power
263 ram_data15
IN/OUT SDRAM
SDRAM (Image
process page
memory) data bus
process page
memory) data bus
264 ram_data14
IN/OUT SDRAM
SDRAM (Image
process page
memory) data bus
process page
memory) data bus
265 VCC_AC
Power
266 ram_data13
IN/OUT SDRAM
SDRAM (Image
process page
memory) data bus
process page
memory) data bus
267 ram_data12
IN/OUT SDRAM
SDRAM (Image
process page
memory) data bus
process page
memory) data bus
268 ram_data11
IN/OUT SDRAM
SDRAM (Image
process page
memory) data bus
process page
memory) data bus
269 ram_data10
IN/OUT SDRAM
SDRAM (Image
process page
memory) data bus
process page
memory) data bus
270 ram_data9
IN/OUT SDRAM
SDRAM (Image
process page
memory) data bus
process page
memory) data bus
271 ram_data8
IN/OUT SDRAM
SDRAM (Image
process page
memory) data bus
process page
memory) data bus
272 VCC_core
Power
273 ram_dqm1
OUT
SDRAM
SDRAM (Image
process page
memory) DQM signal
process page
memory) DQM signal
274 ram_cke
OUT
SDRAM
SDRAM (Image
process page
memory) CKE signal
process page
memory) CKE signal
275 GND_AC
Power
276 ram_clk_out
SDRAM
SDRAM's clock
277 GND_core
Power
278 ram_mad12
OUT
SDRAM
SDRAM (Image
process page
memory) address bus
process page
memory) address bus
279 ram_mad11
OUT
SDRAM
SDRAM (Image
process page
memory) address bus
process page
memory) address bus
280 ram_mad9
OUT
SDRAM
SDRAM (Image
process page
memory) address bus
process page
memory) address bus
PIN
No.
Signal Name
IN/OUT Connected to
Description
281 VCC_core
Power
282 ram_mad8
OUT
SDRAM
SDRAM (Image
process page
memory) address bus
process page
memory) address bus
283 ram_mad7
OUT
SDRAM
SDRAM (Image
process page
memory) address bus
process page
memory) address bus
284 VCC_AC
Power
285 ram_mad6
OUT
SDRAM
SDRAM (Image
process page
memory) address bus
process page
memory) address bus
286 ram_mad5
OUT
SDRAM
SDRAM (Image
process page
memory) address bus
process page
memory) address bus
287 ram_mad4
OUT
SDRAM
SDRAM (Image
process page
memory) address bus
process page
memory) address bus
288 GND_AC
Power
289 cpudata15
IN/OUT CPU
CPU data bus
290 cpudata14
IN/OUT CPU
CPU data bus
291 cpudata13
IN/OUT CPU
CPU data bus
292 cpudata12
IN/OUT CPU
CPU data bus
293 cpudata11
IN/OUT CPU
CPU data bus
294 cpudata10
IN/OUT CPU
CPU data bus
295 cpudata9
IN/OUT CPU
CPU data bus
296 cpudata8
IN/OUT CPU
CPU data bus
PIN
No.
Signal Name
IN/OUT Connected to
Description
R18
11kF
21
C22
0.1u
0.1u
1
2
C23
OPEN
OPEN
1
2
R20
10kF
21
IC4
M51957BFP
NC
8
GND
4
VCC
7
NC
1
IN
2
NC
3
Cd
5
OUT
6
R19
3.3kJ
3.3kJ
21
VCC3
VCC3
/RESET0
(2-C4)
Reset IC
AL-1556/1566 ELECTRICAL SECTION 12 - 8
(5) Heater lamp control circuit
a. Outline
The heater lamp control circuit detects the heat roller surface tempera-
ture, and converts the temperature into a voltage. The converted volt-
age is inputted to the CPU.
ture, and converts the temperature into a voltage. The converted volt-
age is inputted to the CPU.
The CPU converts the inputted analog voltage into a digital value. The
digital conversion value and the set value of the test command are
compared to control ON/OFF of the heater lamp according to the level,
controlling the heat roller surface temperature to be the fixed level.
digital conversion value and the set value of the test command are
compared to control ON/OFF of the heater lamp according to the level,
controlling the heat roller surface temperature to be the fixed level.
[High temperature protection circuit in case of CPU hung up
(uncontrollable)]
(uncontrollable)]
For IC22 3Pin (reference voltage), +3.3V is divided by the resistor. The
thermistor terminal voltage is inputted to IC22 2Pin. When, therefore,
the voltage at 2Pin falls below the voltage at 3Pin, IC22 1Pin becomes
"H" and the HL signal is pulled to the GND level, suppressing genera-
tion of the lighting signal of the heater lamp. (IC22 output 1Pin is nor-
mally Low.)
thermistor terminal voltage is inputted to IC22 2Pin. When, therefore,
the voltage at 2Pin falls below the voltage at 3Pin, IC22 1Pin becomes
"H" and the HL signal is pulled to the GND level, suppressing genera-
tion of the lighting signal of the heater lamp. (IC22 output 1Pin is nor-
mally Low.)
[When the heat roller surface temperature is lower than the set
level]
level]
a. When the thermistor terminal voltage is higher than the set level,
the output signal HL from ASIC becomes HIGH level.
b. This HL signal becomes the HLOUT signal through IC26, and is
inputted to the photo triac coupler in the power PWB. When, there-
fore, the HL signal is HIGH, the internal triac turns on.
fore, the HL signal is HIGH, the internal triac turns on.
c. When the internal triac turns on, the heater lamp lights up.
[When the heat roller surface temperature is higher than the set
level]
level]
a. When the thermistor terminal voltage falls below the set level, the
output signal HL from ASIC becomes LOW level.
b. The HL signal becomes LOW, the power PWB photo triac coupler
turns OFF, and the heater lamp turns OFF.
[When the thermistor is open]
The voltage at IC22 6Pin becomes higher than the voltage at 5Pin, and
the 7Pin output THOPEN becomes LOW. This is inputted to the CPU
to display the trouble code H2.
the 7Pin output THOPEN becomes LOW. This is inputted to the CPU
to display the trouble code H2.
(6) Driver circuit (Clutch, solenoid)
Since a load cannot be directly driven by each load signal from the
CPU or the ASIC, each load is driven through the driver IC (transistor
array).
CPU or the ASIC, each load is driven through the driver IC (transistor
array).
A large drive current (load current) is ordained from a small input cur-
rent (ASIC output current).
rent (ASIC output current).
When the driver input voltage (base resistor input) is HIGH, the transis-
tor turns ON to flow a current through the load, operating the load.
tor turns ON to flow a current through the load, operating the load.
R68
7.5kF
7.5kF
21
R71
4.3kF
4.3kF
21
D1
MA700
1
2
R67
1MF
1MF
21
R66
1kF
1kF
21
R70
10kF
10kF
21
R69
1kJ
1kJ
21
C111
22000p
22000p
1
2
C113
0.1u
1
2
R81
300J
300J
2
1
R82
100J
100J
2
1
C112
0.1u
1
2
R83
1.2kF
1.2kF
21
R85
10kF
10kF
21
R84
10kJ
10kJ
21
C114
22000p
1
2
D4
1SS355
1
2
R86
240J
240J
21
R87
240J
240J
21
IC22A
KIA393F
KIA393F
3
2
1
8
4
+
-
C110
0.1u
1
2
IC22B
KIA393F
KIA393F
5
6
7
8
4
+
-
IC24A
KIA358F
KIA358F
3
2
1
8
4
+
-
IC26
KID65503F
1B
1
2B
2
3B
3
4B
4
5B
5
6B
6
7B
7
G
8
NC
9
1C
16
2C
15
3C
14
4C
13
5C
12
6C
11
7C
10
Q2
KRA119S
KRA119S
1
2
3
D2
KDS226
2
1
3
D3
KDS226
2
1
3
INT5V
12V
VCC3
VCC3
VCC3
12V
VCC3
12V
12V
12V
VCC3
5V
MRPS1
HL
LDEN
PMCLK
FTH
HLOUT
PMCLK_A
MRPS_1
MRPS_1
/LDEN
MRPS_2
FTH
RTH
THOPEN
RTH_IN
MRPS2
MRPS3
MRPS3
MRPS_3
(11-B2)
(11-B2)
(6-A1)
(6-A1)
(6-A1)
(6-A1)
(6-A1)
(5-E3)
(2-D1)
(2-C1)
(2-D1)
(2-D1)
(2-C1)
(1-A2)
(10-B3)
(1-A3)
(4-A4)
(5-B2)
(11-C1)
LOAD
+24V
ASIC/CPU
OUT PUT
LOAD
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