AL-1456 (serv.man14). Electrical section - Sharp Copying Equipment Service Manual (repair manual)

al-1456 (serv.man14) service manual
Model
AL-1456 (serv.man14)
Pages
13
Size
293 KB
Type
PDF
Document
Service Manual
Brand
Device
Copying Equipment / Electrical section
File
al-1456-sm14.pdf
Date

Read Sharp AL-1456 (serv.man14) Service Manual online

AL-1555 ELECTRICAL SECTION 12 - 1
[12] ELECTRICAL SECTION
1. Block diagram
A. Overall block diagram
Carriage Unit
CCD PWB 
12V
R
G
8bits
MSB/LSB)
B
VCL
5VEN
PSW
SELin
ADCCLK
Kin
BSAMP, VSAMP
SDI, SCLK, LOAD
1, 
2, 
TG, 
TG2, 
TG3
RB, 
CLB, 
1L
3.3V
Clock,Data,
LATCH
      CCD
  ( uPD8861)
AFE(AD9826)
  C
  D
  S
  A
  G
  C
  M
  P
  X
  AD
 
16bits
   CCD Driver
    
Operation PWB
   SDRAM
(8MB/16MB)
     CCFL
Lamp
Inverter
I/F PWB
(Optional)
ASIC Reset
IEEE 1284 I/F
3.3V
A[9
1]
USB I/F
D[15
0]
MMD
LSU UNIT
VFM
Main Motor
      PMD
TM+, TM–
DMT0/1/2/3
                     ASIC
     CPU
 H8S/2320
 
I
E
E
E
1
2
8
4
    Laser
I/F PWB
(Optional)
Polygon Motor
OSC
(24MHz)
OSC
(13.9867MHz)
Other Loads
<ASIC I/O>
MPFS,RRS,HL,PR
FAN Motor
SGS
SRRC
SPUS
SPPS
TC
GRIDL
MC
BIAS
MPFS
CPFS2
Toner Motor
Scanner Motor
CPFS1
Duplex Motor
Other Inputs
CPU INTERRUPT
PMCLK
MHPS
SPPD
CPU I/O
RTH
PPD1, POD, MFD, CED1, TCS,
DVS1, PPD2, PPD3, CED2, DSWS
SDSW, SPID, SDOD, DRST
MultiPlexed
MCU PWB UNIT
I2C Bus
  A[16..0]
     D[15
8]
  A[19..0]
     D[15..0]
A[19
0]
D[15
0]
Power Reset
3.3V
3.3V/5V/
5VEN/12V
24V
     CPU
 H8S/2320
 
(19.6608MHz)
EEPROM
(2Kb)
  Reset IC
    SRAM
 (1Mb x 1)
ROM (4Mb)
 
Power Supply Unit
(Low Power/High Power)
 
SPMT0/1/2/3
SPF Motor
U
S
B
1
.
1
AL-1555 ELECTRICAL SECTION 12 - 2
B. MCU PWB unit
T
oner 
Mo
to
Main
 
Motor
 
SPF 
Mo
to
Dupl
e
x
 
Mo
to
S
c
anner 
Mo
to
Operation
PW
CCD 
PW
Inverter
PW
Copy
Lamp 
PO
W
E
R
 
SU
PPL
NewDrum
 
Detect
 
PPD
POD
 
MFD
 
FA
N
 
Mo
to
Cassette
Detect
CPF
S
 
MPFS 
RRS
 
SD
OD
 
D
S
PF
     
M
odel
 Onl
y
 
SPF/D
SPF  
M
odel
 Onl
y
 
CN106 
CN111 
CN114 
CN123 
CN108 
CN109 
CN117 
CN116 
CN110 
IC
126 
CN114 
IC
128 
CN122 
LS
U UNI
T
 
(P
ol
y
gon M
o
to
r) 
 
IC
127 
CN103 
IC
129 
CN124 
IC
103 
CPU(H8S
/2320) 
  
IC
106 
  
ASIC
 
HG73C119HF
 
CN123 
IC
121 
IC
115 
IC
117 
IC
114 
IC
119 
IC
121 
IC
124 
CN101 
IC
125 
CN104 
IC
115 
IC
114 
IC
116 
CN102 
CN112 
IC
124 
IC
125 
Interlock SW
IC
118 
IC
113 
IC
124 
IC
121 
CN119 
IC
115 
CN107 
IC
113 
Interface
 
PW
IC
131 
CN105 
/V
IDE
O
 MPRDY
/SYNC
SPMT_0 
 3 
/DMT_0 
 3 
OUT_A+ 
 B-
SHO
L
D
 
/L
DEN 
PSW 
TMA
_
O
 MMLD
 
/MMD
 
KI
N1
KI
N2
 
OP_C
LK
 
Et
OP_LA
TC
H
 
OP_D
A
T
A
 
Et
AF
E_CL
A
D
_C
LK
 
VCL
 
Et
AF
E_DB0 
 7
MT_A
T_H
OME
 
Et
USBI
VPI
VM
IN
 
Et
P
A
RAD0 
 7
VPO
UT
 
VM
OU
T
 
Etc
 
/POF
F
 
HL
OUT
 
Et
3.3V
IN
 
5V
IN
 
12V
IN
 
24V
IN
 
Et
Et
Et
TMB
_
O
 
VF
M
O
UT
 
/VF
M
CNT
 
IC
125 
CN120 
PPD
THERMISTO
R
HIGH VOLTAGE
 
CONTROL UNIT
 
Heater Lamp
DV UNIT
D
VSEL
 
AL-1555 ELECTRICAL SECTION 12 - 3
2. Circuit descriptions
A. Main PWB (MCU)
(1) General
The MCU PWB is composed of:
• CPU peripheral sections which perform mechanical sequence
control and function job management
• Image process ASIC which performs image process, CCD control,
LSU control, and print control
• Motor control circuit
• Mechanical load, sensor I/O circuit
It controls the processes for copying, the transport loads, fusing, the
optical system, the operation panel, and the option PWB.
(2) CPU signal table (HD6412320F)
PIN 
No.
Signal code
Input/
Output
Operating
1
/CS1
Output
SRAM chip select
2
/CS0
Output
Flash ROM chip select
3
GND
DGND
4
GND
DGND
5
Vcc
CPU3.3V
6
A0
Output
Address bus
7
A1
Output
Address bus
8
A2
Output
Address bus
9
A3
Output
Address bus
10
GND
DGND
11
A4
Output
Address bus
12
A5
Output
Address bus
13
A6
Output
Address bus
14
A7
Output
Address bus
15
A8
Output
Address bus
16
A9
Output
Address bus
17
A10
Output
Address bus
18
A11
Output
Address bus
19
GND
DGND
20
A12
Output
Address bus
21
A13
Output
Address bus
22
A14
Output
Address bus
23
A15
Output
Address bus
24
A16
Output
Address bus
25
A17
Output
Address bus
26
A18
Output
Address bus
27
A19
Output
Address bus
28
GND
DGND
29
A20
Pull-Up
30
PSW
Interruption 
level input
Print SW
31
SPPD
Interruption 
level input
SPF paper sensor
32
CCD_TG
Interruption 
level input
CCD horizontal sync signal
33
Mt_at_home
Interruption 
level input
Mirror Home Position
34
/CPUSYNC
Interruption 
level input
Horizontal sync (ASIC)
35
GND
DGND
36
GND
DGND
37
FW
Interruption 
level input
Zero cross signal
38
ARB_INT
Interruption 
level input
ASIC interruption
39
Vcc
CPU3.3V
40
D0
Data I/O
Data bus
41
D1
Data I/O
Data bus
42
D2
Data I/O
Data bus
43
D3
Data I/O
Data bus
44
GND
DGND
45
D4
Data I/O
Data bus
46
D5
Data I/O
Data bus
47
D6
Data I/O
Data bus
48
D7
Data I/O
Data bus
49
D8
Data I/O
Data bus
50
D9
Data I/O
Data bus
51
D10
Data I/O
Data bus
52
D11
Data I/O
Data bus
53
GND
DGND
54
D12
Data I/O
Data bus
55
D13
Data I/O
Data bus
56
D14
Data I/O
Data bus
57
D15
Data I/O
Data bus
58
Vcc
CPU3.3V
59
ONL
Output
Online LED control
60
TxD1
Output
For debug
61
D_CONT
Output
USB Pull-Up control
62
BEO
Output
OPE LED control
63
RESETOUT1
Output
ASIC Reset signal
64
CL_Reset
Output
Copy lamp control
65
GND
DGND
66
/DREQ0
Pull-Up
67
GND
DGND
68
GND
DGND
69
RY/BY
Input
Flash Busy signal
70
KIN1
Input
HC151 selector detection
71
KIN2
Input
HC151 selector detection
72
TMCLK
Output
Toner motor lock
73
TMEN
Output
Toner motor enable
74
POFF
Output
Shut off control
75
PMCLK
Output
Polygon clock
76
DMT0
Output
Duplex Motor signal
77
DMT1
Output
Duplex Motor signal
78
DMT2
Output
Duplex Motor signal
79
DMT3
Output
Duplex Motor signal
80
WDTOVF
Output
NC Pull-Up
81
/RES
Input
Reset
82
NMI
Output
NC Pull-Up
83
STBY
Output
NC Pull-Up
84
Vcc
CPU3.3V
85
XTAL
Input
Clock
86
EXTAL
Output
Clock
87
GND
DGND
88
CPUCLK
Output
NC
89
Vcc
CPU3.3V
90
Reset OUT
NC 
91
/RD
Output
Read signal
92
/HWR
Output
Write signal (High address)
93
/LWR
Output
Write signal (Low address)
94
SELIN3
Output
HC151 select signal 
95
SELIN2
Output
HC151 select signal
96
SELIN1
Output
HC151 select signal
97
FAXSTS
NC
98
FAXCMD
NC
99
GND
DGND
100
GND
DGND
101
SCL
Output
EEPROM clock
102
DSDA
Data I/O
EEPROM Data bus
103
AVcc
CPU3.3V
104
Vref
CPU3.3V
105
RTH
Analog 
input
Fusing thermistor
106
Analog 
input
NC Pull-Up
107
SIN1
Input
HC151 select detection
108
SIN2
Input
HC151 select detection
109
SIN3
Input
HC151 select detection
PIN 
No.
Signal code
Input/
Output
Operating
AL-1555 ELECTRICAL SECTION 12 - 4
(3) Image process ASIC (HG73C119HF)
a. General
The ASIC is composed of the three major blocks: the image process
section, the print control section, and the I/F section.
Image process section:
With image data from the CCD PWB in the operation mode deter-
mined by the register setup, shading, AE process, input 
γ 
correc-
tion, area separation, filter process, resolution conversion, zoom
process, output 
γ 
correction, binary conversion (error diffusion,
dither method, simple binary conversion) are performed.
Print control section:
When copying, the image-processed data are outputted to the LSU
according to the LSU writing timing. When scanning, the image
data are made into 8bit width and outputted to the I/F section
(USB).
I/F section:
Controls the DRAM which is the image data buffer, and processes
data send/receive between the USB I/F and the IEEE1284 I/F.
The ASIC is controlled by writing the operation mode and the neces-
sary setup values of the operation mode into the ASIC control register
before starting each operation. (For ASIC Pin configuration, refer to the
table at the end of this document.)
b. ASIC (Signal table)
110
USBIN
Input
IF PWB detection signal
111
Input
NC
112
Input
NC
113
Avss
DGND
114
GND
DGND
115
/SCANSP
Output
Scan STOP signal
116
/SCANST
Output
Scan START signal
117
/TRANSST
Output
ASIC transfer signal
118
/PRINTST
Output
Print Start signal
119
SPMT3
Output
SPF motor signal
120
SPMT2/MIRCNT
Output/
Input
SPF motor signal/mirror 
counter
121
SPMT1
Output
SPF motor signal
122
SPMT0
Output
SPF motor signal
123
GND
DGND
124
GND
DGND
125
Vcc
CPU3.3V
126
PSL
Output
Power save LED control
127
NC
128
/CS2
Output
ASIC chip select
PIN 
No.
Signal code
Input/
Output
Operating
Scan start
CCD 
PWB
Shading
CCD drive
AE
Resolution conversion, 
Zooming, lmage 
process circuit
Print data process circuit
DRAM control
PRINT control 
DRAM
8MB or 16MB
LSU
HSYNC
VSYNC
To CPU bus
ASIC
Image process  section
I/F section
Print control section
ASIC control resistor
PIN 
No.
Signal Name
IN/OUT
Connected 
to
Description
1
cpu_ad7
IN
CPU
CPU address bus
2
cpu_ad6
IN
CPU
CPU address bus
3
cpu_ad5
IN
CPU
CPU address bus
4
cpu_ad4
IN
CPU
CPU address bus
5
VCC(CORE/DC) 
3.3V
Power
6
cpu_ad3
IN
CPU
CPU address bus
7
cpu_ad2
IN
CPU
CPU address bus
8
GND(CORE/DC) Power
9
cpu_ad1
IN
CPU
CPU address bus
10
sgs
OUT
Tr array IC SPF/RSPF gate 
solenoid control signal 
"H":ON
11
srrc
OUT
Tr array IC SPF/RSPF resist roller 
clutch control signal 
"H":ON
12
spus
OUT
Tr array IC SPF/RSPF document 
feed solenoid control 
signal "H":ON
13
spfs
OUT
Tr array IC SPF/RSPF document 
transport solenoid 
control signal "H":ON
14
mrps1
OUT
Tr array IC SPF/RSPF motor 
current control signal
15
mrps2
OUT
Tr array IC SPF/RSPF motor 
current control signal
PIN 
No.
Signal Name
IN/OUT
Connected 
to
Description
Page of 13

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