DOWNLOAD Sharp AL-1255 (serv.man14) Service Manual ↓ Size: 293 KB | Pages: 13 in PDF or view online for FREE

Name: Sharp AL-1255 (serv.man14)
Brand: Sharp
SKU: 42723
Rating: 4 (1 reviews)

Model: AL-1255 (serv.man14)
Pages: 13
Size: 293 KB
Type: PDF
Document: Service Manual
Brand: Sharp
Device: Copying Equipment / Electrical section
File: al-1255-sm14.pdf
Date: 2018-11-20

PREV: Sharp AL-1255 (serv.man13) Service Manual

Sharp AL-1255 (serv.man14) Service Manual ▷ View online

AL-1555 ELECTRICAL SECTION 12 - 5
16
ope_latch
OUT
Tr array IC Operation circuit latch 
signal. Data take-in at 
"L"
17
op_data
OUT
Tr array IC Operation circuit data 
signal
18
VCC(AC) 3.3V
Power
19
op_clk
OUT
Tr array IC Operation circuit clock 
signal
20
vfmcnt
OUT
Tr array IC Ventilation fan rotation 
speed control signal. 
"H": High speed, "L": 
Low speed
21
GND(AC)
Power
22
vfm
OUT
Tr array IC Ventilation fan control 
signal. "H": Fan ON
23
tc
OUT
Tr array IC  Transfer charger 
control signal. "H":ON
24
gridl
OUT
Tr array IC Main charger grid 
control signal. "H": L 
output
25
mc
OUT
Tr array IC Main charger control 
signal. "H": ON
26
mrps3
OUT
Tr array IC SPF/RSPF motor 
current control signal
27
mm_y3
OUT
Tr array IC Carriage motor current 
control signal
28
bias
OUT
Tr array IC DV bias control signal. 
"H":ON
29
lden
OUT
Tr array IC Laser circuit control 
signal. "H": Laser 
circuit ON
30
pmd
OUT
Tr array IC Polygon motor control 
signal. "H": Polygon 
motor ON
31
GND(CORE/DC) Power
32
mmd
OUT
Tr array IC Main motor control 
signal. "H": Main motor 
ON
33
GND(CORE/DC) Power
34
VCC(CORE/DC) 
3.3V
Power
35
mpfs
OUT
Tr array IC Manual feed solenoid 
control signal. "H": ON
36
cpfs2
OUT
Tr array IC Second cassette 
paper feed solenoid 
control signal. "H":ON
37
cpfs1
OUT
Tr array IC Cassette paper feed 
solenoid control 
signal. "H":ON
38
poffr
(Not used)
39
rrs
OUT
Tr array IC Resist roller solenoid 
control signal. "H":ON
40
pr
OUT
Tr array IC Power relay control 
signal. "H":ON
41
hl
OUT
Tr array IC Heater lamp control 
signal. "H":ON
42
TMON
OUT
Tr array IC (Not used)
43
TM_
OUT
Buffer IC
Toner motor control 
signal 
44
VCC(AC) 3.3V
Power
45
TM
OUT
Buffer IC
Toner motor control 
signal 
46
miron
OUT
Buffer IC
SPF scanner select 
signal 
47
GND(AC)
Power
48
spfon
OUT
Buffer IC
SPF ON signal
PIN 
No.
Signal Name
IN/OUT
Connected 
to
Description
49
mircnt
OUT
Buffer IC
SPF scanner select 
signal 
50
GND(AC)
Power
51
pcl_s_print
(Not used)
52
fax_s_print
(Not used)
53
es_s_print
(Not used)
54
prareaen
(Not used)
55
d_s_ATDI_B
(Not used)
56
GND(CORE/DC) Power
57
VCC(CORE/
GND) 3.3V
58
pfclko
(Not used)
59
RESET
IN
ASIC reset signal
60
GND(CORE/DC) Power
61
ATRST
IN
(Not used)
62
ATCK
(Not used)
63
ATMS
(Not used)
64
VCC(AC) 3.3V
Power
65
ie1284_stb
IN
I/F board 
connector
/STB signal 
(IEEE1284 
communication port) 
66
ie1284_autofd
IN
I/F board 
connector
/AUTOFD signal 
(IEEE1284 
communication port) 
67
ie1284_slctin
IN
I/F board 
connector
/SLCTIN signal 
(IEEE1284 
communication port) 
68
ie1284_init
IN
I/F board 
connector
/INIT signal 
(IEEE1284 
communication port) 
69
VCC(CORE/DC) 
3.3V
Power
70
ie1284_slct
OUT
I/F board 
connector
SLCT signal 
(IEEE1284 
communication port) 
71
ie1284_pe
OUT
I/F board 
connector
PE signal (IEEE1284 
communication port) 
72
GND(CORE/DC) Power
73
ie1284_busy
OUT
I/F board 
connector
BUSY signal 
(IEEE1284 
communication port) 
74
ie1284_ack
OUT
I/F board 
connector
/ACK signal 
(IEEE1284 
communication port) 
75
ie1284_fault
OUT
I/F board 
connector
/FAULT signal 
(IEEE1284 
communication port) 
76
ie1284_rev
OUT
I/F board 
connector
/REV signal 
(IEEE1284 
communication port) 
77
ie1284_parad7
IN/OUT I/F board 
connector
DATA bus (IEEE1284 
communication port) 
78
ie1284_parad6
IN/OUT I/F board 
connector
DATA bus (IEEE1284 
communication port) 
79
ie1284_parad5
IN/OUT I/F board 
connector
DATA bus (IEEE1284 
communication port) 
80
ie1284_parad4
IN/OUT I/F board 
connector
DATA bus (IEEE1284 
communication port) 
81
ie1284_parad3
IN/OUT I/F board 
connector
DATA bus (IEEE1284 
communication port) 
82
VCC(AC) 3.3V
83
ie1284_parad2
IN/OUT I/F board 
connector
DATA bus (IEEE1284 
communication port) 
84
ie1284_parad1
IN/OUT I/F board 
connector
DATA bus (IEEE1284 
communication port) 
85
GND(AC)
Power
PIN 
No.
Signal Name
IN/OUT
Connected 
to
Description

AL-1555 ELECTRICAL SECTION 12 - 6
86
ie1284_parad0
IN/OUT I/F board 
connector
DATA bus (IEEE1284 
communication port) 
87
suspend
OUT
I/F board 
connector
SUSPEND signal 
(USB communication 
port) 
88
vmin
IN
I/F board 
connector
VMIN signal (USB 
communication port) 
89
vpin
IN
I/F board 
connector
VPIN signal (USB 
communication port) 
90
rcv
IN
I/F board 
connector
RCV signal (USB 
communication port) 
91
oen
OUT
I/F board 
connector
OEN signal (USB 
communication port) 
92
vmout
OUT
I/F board 
connector
VMOUT signal (USB 
communication port) 
93
vpout
OUT
I/F board 
connector
VPOUT signal (USB 
communication port) 
94
tm2_15m
(Not used)
95
VCC(PLL) 3.3V
Power
96
GND(PLL)
Power
97
VCC(PLL) 3.3V
Power
98
GND(PLL)
Power
99
pfclk
IN
Clock
100 VCC(CORE/DC) 
3.3V
Power
101 GND(CORE/DC) Power
102 ram_data0
IN/OUT SDRAM
SDRAM (Image 
process page 
memory) data bus
103 ram_data1
IN/OUT SDRAM
SDRAM (Image 
process page 
memory) data bus
104 ram_data2
IN/OUT SDRAM
SDRAM (Image 
process page 
memory) data bus
105 GND(AC)
Power
106 ram_data3
IN/OUT SDRAM
SDRAM (Image 
process page 
memory) data bus
107 ram_data4
IN/OUT SDRAM
SDRAM (Image 
process page 
memory) data bus
108 VCC(AC) 3.3V
Power
109 ram_data5
IN/OUT SDRAM
SDRAM (Image 
process page 
memory) data bus
110 ram_data6
IN/OUT SDRAM
SDRAM (Image 
process page 
memory) data bus
111 GND(CORE/DC) Power
112 ram_data7
IN/OUT SDRAM
SDRAM (Image 
process page 
memory) data bus
113 ram_data15
IN/OUT SDRAM
SDRAM (Image 
process page 
memory) data bus
114 ram_data14
IN/OUT SDRAM
SDRAM (Image 
process page 
memory) data bus
115 VCC(CORE/DC) 
3.3V
Power
116 ram_data13
IN/OUT SDRAM
SDRAM (Image 
process page 
memory) data bus
117 ram_data12
IN/OUT SDRAM
SDRAM (Image 
process page 
memory) data bus
PIN 
No.
Signal Name
IN/OUT
Connected 
to
Description
118 GND(CORE/DC) Power
119 ram_data11
IN/OUT SDRAM
SDRAM (Image 
process page 
memory) data bus
120 ram_data10
IN/OUT SDRAM
SDRAM (Image 
process page 
memory) data bus
121 VCC(CORE/DC) 
3.3V
122 ram_data9
IN/OUT SDRAM
SDRAM (Image 
process page 
memory) data bus
123 ram_data8
IN/OUT SDRAM
SDRAM (Image 
process page 
memory) data bus
124 GND(AC)
Power
125 ram_clk
OUT
SDRAM
SDRAM (Image 
process page 
memory)  CLK signal
126 ram_cke
OUT
SDRAM
SDRAM (Image 
process page 
memory)  CKE signal
127 xram_wde
OUT
SDRAM
SDRAM (Image 
process page 
memory)  WDE signal
128 VCC(AC) 3.3V
Power
129 GND(CORE/DC) Power
130 xram_cas
OUT
SDRAM
SDRAM (Image 
process page 
memory) CAS signal
131 xram_ras
OUT
SDRAM
SDRAM (Image 
process page 
memory) RAS signal
132 xram_cs
OUT
SDRAM (Image 
process page 
memory) CS signal
133 VCC(CORE/DC) 
3.3V
Power
134 ram_banks0
OUT
SDRAM
SDRAM (Image 
process page 
memory) BANK signal
135 ram_banks1
OUT
SDRAM
SDRAM (Image 
process page 
memory) BANK signal
136 GND(CORE/DC) Power
137 ram_dqm0
OUT
SDRAM
SDRAM (Image 
process page 
memory) DQM signal
138 ram_dqm1
OUT
SDRAM
SDRAM (Image 
process page 
memory) DQM signal
139 ram_mad12
OUT
SDRAM
SDRAM (Image 
process page 
memory) address bus
140 VCC(CORE/DC) 
3.3V
Power
141 ram_mad11
OUT
SDRAM
SDRAM (Image 
process page 
memory) address bus
142 ram_mad9
OUT
SDRAM
SDRAM (Image 
process page 
memory) address bus
143 GND(AC)
144 ram_mad8
OUT
SDRAM
SDRAM (Image 
process page 
memory) address bus
PIN 
No.
Signal Name
IN/OUT
Connected 
to
Description

AL-1555 ELECTRICAL SECTION 12 - 7
145 ram_mad7
OUT
SDRAM
SDRAM (Image 
process page 
memory) address bus
146 VCC(AC)
147 ram_mad6
OUT
SDRAM
SDRAM (Image 
process page 
memory) address bus
148 ram_mad5
OUT
SDRAM
SDRAM (Image 
process page 
memory) address bus
149 GND(CORE/DC)
150 ram_mad4
OUT
SDRAM
SDRAM (Image 
process page 
memory) address bus
151 ram_mad10
OUT
SDRAM
SDRAM (Image 
process page 
memory) address bus
152 ram_mad0
OUT
SDRAM
SDRAM (Image 
process page 
memory) address bus
153 VCC(CORE/DC)
154 ram_mad1
OUT
SDRAM
SDRAM (Image 
process page 
memory) address bus
155 ram_mad2
OUT
SDRAM
SDRAM (Image 
process page 
memory) address bus
156 ram_mad3
OUT
SDRAM
SDRAM (Image 
process page 
memory) address bus
157 d_s_ATDO_B
(Not used)
158 cl
OUT
Logic IC
Copy lamp control 
signal
159 VCC(CORE/DC) 
3.3V
Power
160 afp_oeb
(Not used)
161 ccd_tg
OUT
CCD PWB
CCD control signal
162 GND(CORE/DC) Power
163 afp_vsmp
OUT
CCD PWB
AFE control signal
164 ccdrs
OUT
CCD PWB
CCD control signal
165 ccdcp
OUT
CCD PWB
CCD control signal
166 VCC(AC) 3.3V
Power
167 afp_bsmp
OUT
CCD PWB
AFE control signal
168 ccd_ph2
OUT
CCD PWB
CCD control signal
169 afp_afesdi
OUT
CCD PWB
AFE control signal
170 GND(AC)
Power
171 ccd_ph1
OUT
CCD PWB
CCD control signal
172 VCC(CORE/DC)
173 afp_adcclk
OUT
CCD PWB
AFE control signal
174 afp_afesen
OUT
CCD PWB
AFE control signal
175 GND(CORE/DC) Power
176 afp_afesck
OUT
CCD PWB
AFE control signal
177 mtr_at_home
IN
CCD PWB
Carriage home 
position signal
178 VCC(CORE/DC)
Power
179 afp_data7
IN
CCD PWB
Image scan data
180 afp_data6
IN
CCD PWB
Image scan data
181 afp_data5
IN
CCD PWB
Image scan data
182 GND(CORE/DC) Power
183 afp_data4
IN
CCD PWB
Image scan data
184 afp_data3
IN
CCD PWB
Image scan data
185 VCC(AC) 3.3V
Power
186 afp_data2
IN
CCD PWB
Image scan data
187 afp_data1
IN
CCD PWB
Image scan data
188 GND(AC)
Power
PIN 
No.
Signal Name
IN/OUT
Connected 
to
Description
189 afp_data0
IN
CCD PWB
Image scan data
190 GND(CORE/DC) Power
191 sfclk
IN
Clock
192 tm2_24m
(Not used)
193 GND(PLL)
Power
194 VCC(PLL) 3.3V
Power
195 GND(PLL)
Power
196 VCC(PLL) 3.3V
Power
197 VCC(CORE/DC) 
3.3V
Power
198 mtr_y1
OUT
Tr array  IC Carriage motor current 
control signal
199 mtr_phase1
OUT
Motor 
driver
Carriage motor control 
signal 
200 GND(CORE/DC) Power
201 mtr_i01
OUT
Motor 
driver
Carriage motor control 
signal 
202 mtr_i11
OUT
Motor 
driver
Carriage motor control 
signal 
203 mtr_i21
OUT
Motor 
driver
Carriage motor control 
signal 
204 mtr_phase2
OUT
Motor 
driver
Carriage motor control 
signal 
205 VCC(CORE/DC) 
3.3V
Power
206 mtr_i02
OUT
Motor 
driver
Carriage motor control 
signal 
207 mtr_i12
OUT
Motor 
driver
Carriage motor control 
signal 
208 mtr_i22
OUT
Motor 
driver
Carriage motor control 
signal 
209 mtr_y2
OUT
Tr array  IC Carriage motor current 
control signal 
210 VCC(AC) 3.3V
Power
211 xsync
IN
LSU
Horizontal sync signal 
from LSU (/SYNC)
212 xld
OUT
LSU
Laser drive signal 
(/VIDEO)
213 GND(AC)
Power
214 xlend
OUT
LSU
Laser APC signal 
(/LEND)
215 xcpuwr
IN
CPU
CPU write signal
216 xcpurd
IN
CPU
CPU read signal
217 scanstop
IN
CPU
Scan stop signal
218 scanst
IN
CPU
Scan start signal
219 transst
IN
CPU
Data transfer start 
signal
220 printst
IN
CPU
Print start signal
221 tmen
IN
CPU
Toner motor clock 
enable signal
222 testpin4
(Not used)
223 VCC(CORE/DC) 
3.3V
Power
224 testpin3
(Not used)
225 tmclk
IN
Toner motor clock 
signal
226 GND(CORE/DC) Power
227 testpin2
(Not used)
228 testpin1
(Not used)
229 testpin0
(Not used)
230 cpudata15
IN/OUT CPU
CPU data bus
231 cpudata14
IN/OUT CPU
CPU data bus
232 cpudata13
IN/OUT CPU
CPU data bus
233 cpudata12
IN/OUT CPU
CPU data bus
234 cpudata11
IN/OUT CPU
CPU data bus
PIN 
No.
Signal Name
IN/OUT
Connected 
to
Description

AL-1555 ELECTRICAL SECTION 12 - 8
(3) Reset circuit
This circuit detects ON/OFF of power to control start/stop of each cir-
cuit. The 3.3V voltage of the main PWB is detected by the reset IC to
generate the reset signal.
When the power voltage reaches the specified level, the circuit opera-
tions are started. Before the power voltage falls below the specified
level, the circuit operations are stopped to prevent against malfunc-
tions.
(4) Heater lamp control circuit
a. Outline
The heater lamp control circuit detects the heat roller surface tempera-
ture and converts in into a voltage level. The converted voltage is
inputted to the CPU analog input pin.
The CPU converts the inputted analog voltage into a digital signal level
and compares it with the set value of the simulation to control on/off the
heater lamp according to the level, maintaining the heat roller surface
temperature at a constant level.
The lower the heat roller surface temperature is, the greater the ther-
mistor resistance is, and vise versa.
Therefore, the lower the heat roller surface temperature is, the higher
the thermistor terminal voltage is, and vise versa. The thermistor termi-
nal voltage is inputted to the CPU analog port.
The CPU controls ON/OFF of the heater lamp by this input voltage
level.
[High temperature protect circuit in case of CPU hung up]
For IC120 3pin (reference voltage), +3.3V is divided by the resistor.
The thermistor terminal voltage is inputted to IC120 2pin.
When, the voltage at 2pin becomes lower than the voltage at 3pin
(when the heat roller temperature is about 220 –  230° C), IC120 1pin
becomes HIGH, and the HL signal is lowered to the GND potential
through IC124, stopping generation of the heater lamp ON signal.
(IC120 1pin is normal LOW.)
235 cpudata10
IN/OUT CPU
CPU data bus
236 VCC(AC) 3.3V
Power
237 cpudata9
IN/OUT CPU
CPU data bus
238 cpudata8
IN/OUT CPU
CPU data bus
239 GND(CORE/DC) Power
240 cpudata7
IN/OUT CPU
CPU data bus
241 cpudata6
IN/OUT CPU
CPU data bus
242 cpudata5
IN/OUT CPU
CPU data bus
243 cpudata4
IN/OUT CPU
CPU data bus
244 VCC(CORE/DC) 
3.3V
Power
245 cpudata3
IN/OUT CPU
CPU data bus
246 cpudata2
IN/OUT CPU
CPU data bus
247 cpudata1
IN/OUT CPU
CPU data bus
248 cpudata0
IN/OUT CPU
CPU data bus
249 VCC(AC) 3.3V
Power
250 xcpucs
IN
CPU
CS signal
251 mem_intr
(Not used)
252 GND(AC)
Power
253 arb_intr
OUT
CPU
INTR signal
254 cpusync
OUT
CPU
CPU SYNC signal
255 cpu_ad9
IN
CPU
CPU address bus
256 cpu_ad8
IN
CPU
CPU address bus
PIN 
No.
Signal Name
IN/OUT
Connected 
to
Description
Reset _OU T
(ASIC Reset)
VCC3
VCC3
R114
 
11kF
 
C124
 
0.1u
 
C125
 
22000p
 
R117
 
10kF
 
IC104
M51957BFP
 
NC
8
GND
 
4
VCC
7
NC
 
1
IN
 
2
NC
 
3
Cd
5
OUT
6
R115
 
10kJ
 
      CPU  
 
                P34 
 
              /RES 
ASIC 
12V
VCC3
VCC3
VCC3
12V
VCC3
12V
12V
12V
VCC3
5V
FTH
RTH
THOPEN
RTH_IN
(1-A3)
(4-A3)
(5-B2)
(9-C2)
or KIA393F
or KIA393F
or KIA358F
or KDS226
or KDS226
R156
7.5kF
R159
4.3kF
D101
MA700
R155
1MF
R154
1kF
R158
10kF
R157
1kJ
C197
22000p
C199
0.1u
R169
300J
R170
100J
C198
0.1u
D102
DA204K
1
2
3
D103
DA204K
1
2
3
R171
1.2kF
R173
10kF
R172
10kJ
C200
22000p
+
-
IC120A
NJM2903
3
2
1
8
4
C196
0.1u
+
-
IC120B
NJM2903
5
6
7
8
4
+
-
IC122A
LM358
3
2
1
8
4
CPU 
AN0 
t
1
2
Thermistor 
Heat Roller 
SW5V
(3-
3B) HL
HT EMP
HL
OUT (10-3A)
/HL
IC205
TD62503F
I1
1
O1
16
I2
2
O2
15
I3
3
I4
4
O3
14
I5
5
O4
13
I6
6
O5
12
I7
7
COM
8
O6
11
O7
10
NC
9
R2
7
4
24
0J
R2
8
0
24
0J
Q205
DTA143XKA
OUT
IN
GND
D103
1SS133
A
K
To AC circuit
(Heater lamp
Control)

Display

Click on the first or last page to see other AL-1255 (serv.man14) service manuals if exist.

RANDOM: