Sharp DM-1500 (serv.man2) Service Manual ▷ View online
3. PCL PWB Block diagram
A. Overall block diagram
CPU
IDT
RV4650
133MHz
DRAM
On
board 8MB
Chipset
ASIC
Pegasus
SYSCMD[8:0]
SYSAD[63:0]
SYSAD[31:0]
RAD[21:1]
Code
ROM(1)
RAD[21:0]
SYSAD[31:0]
BOOT
ROM(1)
RAD[21:0]
SYSAD[31:0]
ROMCS3
ROMCS0
ROMCS[3:0]
I/F
ASIC
PARA CONN
RAD[21:0]
SYSAD[15:0]
PIACS0
USS725
USB to
IEEE1284 Bridge
USB CONN
M66236FP
Video
CONN
PLL
IC
CY2292
VFCLK
=13.98MHz
UCLK=14.318MHz
MasterCLK=44.44MHz
MODECLK
MODEIN
14.31818MHz
168pin
DIMM
SLOT
MD[63:0]
MA[11:0]
RAS/CAS
22.22MHz
MA[11:0]
MD[63:0]
RAS/CAS
MA[11:0]
MD[63:0]
RAS/CAS
EEPROM
DM-1505
11 – 12
4. Block diagram functional descriptions
Descriptions of each block
PCL PWB
Controls PCL print.
CPU
Control IC
Chipset ASIC
Image forming, ROM/RAM access
PLL IC
CPU/ASIC/M66236fp clock
generation
generation
M66236FP
Jitter adjustment IC
I/F ASIC
IEEE1284 parallel conversion ASIC
EEPROM
Stores device ID and data
necessary for control.
necessary for control.
BOOTROM (1)
Stores data necessary for booting
programs.
programs.
Code ROM (1)
Stores PCL process program and
fonts.
fonts.
USS725 USB to
IEEE1284 Bridge
IEEE1284 Bridge
Converts USB standard signals
into IEEE1284 standard signals.
into IEEE1284 standard signals.
DRAM On board 8
MB
MB
Work RAM for the system and
PCL process
PCL process
168 pin DIMM
SLOT Max 64 MB
SLOT Max 64 MB
Work RAM for PCL process
(Expanded by expansion RAM.)
(Expanded by expansion RAM.)
Video CONN
Interface connector for
communication between MCU
PWB and PCL PWB
communication between MCU
PWB and PCL PWB
14.31818 MHz
PLL IC reference clock
PCL I/F PWB
Interface PWB for connection of
external device and PCL PWB
external device and PCL PWB
PARACONN
IEEE1284 conforming Centronics
connector
connector
USB CONN
USB connector
MCU PWB
Digital copier main control PWB
Operational descriptions
Connected to PARACONN or USBCONN of PCL I/F PWB
(CPWBF0057QS51).
Print data made by page description language is inputted from an ex-
ternal device.
Connected to PARACONN or USBCONN of PCL I/F PWB
(CPWBF0057QS51).
Print data made by page description language is inputted from an ex-
ternal device.
The PCL I/F PWB (CPWBF0057QS51) is provided with two kinds of
connectors for external devices. The suitable connector is determined
according to the connection type with an external device as follows:
•
connectors for external devices. The suitable connector is determined
according to the connection type with an external device as follows:
•
An external device is connected to PARACONN, and not connected
to USBCONN.
to USBCONN.
→ Data sent from the external device connected to PARACONN is
printed.
•
An external device is not connected to PARACONN, but connected
to USBCONN.
to USBCONN.
→ Data sent from the external device connected to USBCONN is
printed.
•
An external device is connected to PARACONN, and not connected
to USBCONN.
to USBCONN.
→ Data sent from the external device connected to USBCONN is
printed.
The external device connected to PARACONN is not recognized.
The external device connected to PARACONN is not recognized.
Data inputted to PCL I/F PWB is inputted to PCL PWB and PCL-
decoded and converted to generate BITMAP data for print.
decoded and converted to generate BITMAP data for print.
To generate BITMAP data for print, DRAM On board 8 MB and the ex-
pansion RAM inserted into the 168 pin DIMM are used as the work
area.
pansion RAM inserted into the 168 pin DIMM are used as the work
area.
BITMAP data generated in PCL PWB are subject to jitter adjustment by
M66236FP, and inputted to MCU PWB through Video CONN to per-
form laser output and print.
M66236FP, and inputted to MCU PWB through Video CONN to per-
form laser output and print.
DM-1505
11 – 13
CPU (VHIIDT79RC465) I/O pin arrangement list (PCL Model)
PIN
No.
Pin name
Signal name
IN/OUT
Destination
Function
1
N.C
N.C
N.C,
2
N.C
N.C
N.C
3
N.C
N.C
N.C
4
N.C
N.C
N.C
5
N.C
N.C
N.C
6
N.C
N.C
N.C
7
N.C
N.C
N.C
8
N.C
N.C
N.C
9
N.C
N.C
N.C
10
SYSAD11
SYSAD11
IN/OUT
ASIC(KZ4H167V06), 16M FLASH,
8M FLASH, 74LVC16245
8M FLASH, 74LVC16245
System address data bus
11
V
SS
GND
IN
GND
12
V
CC
3.3V
IN
Power source
13
SYSCMD8
SYSCMD8
OUT
ASIC (KZ4H167V06)
System command data bus
14
SYSAD42
SYSAD42
IN/OUT
ASIC(KZ4H167V06), 74LVC16244
System address data bus
15
SYSAD10
SYSAD10
IN/OUT
ASIC(KZ4H167V06), 16M FLASH,
8M FLASH, 74LVC16245
8M FLASH, 74LVC16245
System address data bus
16
SYSCMD7
SYSCMD7
OUT
ASIC (KZ4H167V06)
System command data bus
17
V
SS
GND
IN
GND
18
V
CC
3.3V
IN
Power source
19
SYSAD41
SYSAD41
IN/OUT
ASIC(KZ4H167V06), 74LVC16244
System address data bus
20
SYSAD9
SYSAD9
IN/OUT
ASIC(KZ4H167V06), 16M FLASH,
8M FLASH, 74LVC16245
8M FLASH, 74LVC16245
System address data bus
21
SYSCMD6
SYSCMD6
OUT
ASIC (KZ4H167V06)
System command data bus
22
SYSAD40
SYSAD40
IN/OUT
ASIC(KZ4H167V06), 74LVC16244
System address data bus
23
V
SS
GND
IN
GND
24
V
CC
3.3V
IN
Power source
25
SYSAD8
SYSAD8
IN/OUT
ASIC(KZ4H167V06), 16M FLASH,
8M FLASH, 74LVC16245
8M FLASH, 74LVC16245
System address data bus
26
SYSCMD5
SYSCMD5
OUT
ASIC (KZ4H167V06)
System command data bus
27
SYSADC4
IN
NC (3.3V pull up)
28
SYSADC0
IN
NC (3.3V pull up)
29
V
SS
GND
IN
GND
30
V
CC
3.3V
IN
Power source
31
SYSCMD4
SYSCMD4
OUT
ASIC (KZ4H167V06)
System command data bus
32
SYSAD39
SYSAD39
IN/OUT
ASIC(KZ4H167V06), 74LVC16244
System address data bus
33
SYSAD7
SYSAD7
IN/OUT
ASIC(KZ4H167V06), 16M FLASH,
8M FLASH, 74LVC16245
8M FLASH, 74LVC16245
System address data bus
34
SYSCMD3
SYSCMD3
OUT
ASIC (KZ4H167V06)
System command data bus
35
V
SS
GND
IN
GND
36
V
CC
3.3V
IN
Power source
37
SYSAD38
SYSAD38
IN/OUT
ASIC(KZ4H167V06), 74LVC16244
System address data bus
38
SYSAD6
SYSAD6
IN/OUT
ASIC(KZ4H167V06), 16M FLASH,
8M FLASH, 74LVC16245
8M FLASH, 74LVC16245
System address data bus
39
MODECLOCK
MODECLK
OUT
ASIC(KZ3H008302)
Boot mode clock
40
WR RDY
READY_
IN
External IC write ready
41
SYSAD37
SYSAD37
IN/OUT
ASIC(KZ4H167V06), 74LVC16244
System address data bus
42
SYSAD5
SYSAD5
IN/OUT
ASIC(KZ4H167V06), 16M FLASH,
8M FLASH, 74LVC16245
8M FLASH, 74LVC16245
System address data bus
DM-1505
11 – 14
PIN
No.
Pin name
Signal name
IN/OUT
Destination
Function
43
V
SS
GND
IN
GND
44
V
CC
3.3V
IN
Power source
45
N.C
N.C
N.C
46
N.C
N.C
N.C
47
N.C
N.C
N.C
48
N.C
N.C
N.C
49
N.C
N.C
N.C
50
N.C
N.C
N.C
51
N.C
N.C
N.C
52
N.C
N.C
N.C
53
N.C
N.C
N.C
54
N.C
N.C
N.C
55
N.C
N.C
N.C
56
N.C
N.C
N.C
57
SYSCMD2
SYSCMD2
OUT
ASIC (KZ4H167V06)
System command data bus
58
SYSAD36
SYSAD36
IN/OUT
ASIC(KZ4H167V06), 74LVC16244
System address data bus
59
SYSAD4
SYSAD4
IN/OUT
ASIC(KZ4H167V06), 16M FLASH,
8M FLASH, 74LVC16245
8M FLASH, 74LVC16245
System address data bus
60
SYSCMD1
SYSCMD1
OUT
ASIC (KZ4H167V06)
System command data bus
61
V
SS
GND
IN
GND
62
V
CC
3.3V
IN
Power source
63
SYSAD35
SYSAD35
IN/OUT
ASIC(KZ4H167V06), 74LVC16244
System address data bus
64
SYSAD3
SYSAD3
IN/OUT
ASIC(KZ4H167V06), 16M FLASH,
8M FLASH, 74LVC16245
8M FLASH, 74LVC16245
System address data bus
65
SYSCMD0
SYSCMD0
OUT
ASIC (KZ4H167V06)
System command data bus
66
SYSAD34
SYSAD34
IN/OUT
ASIC(KZ4H167V06), 74LVC16244
System address data bus
67
V
SS
GND
IN
GND
68
V
CC
3.3V
IN
Power source
69
SYSAD2
SYSAD2
IN/OUT
ASIC(KZ4H167V06), 16M FLASH,
8M FLASH, 74LVC16245
8M FLASH, 74LVC16245
System address data bus
70
INT5
IN
NC (3.3V pull up)
71
SYSAD33
SYSAD33
IN/OUT
ASIC(KZ4H167V06), 74LVC16244
System address data bus
72
SYSAD1
SYSAD1
IN/OUT
ASIC(KZ4H167V06), 16M FLASH,
8M FLASH, 74LVC16245
8M FLASH, 74LVC16245
System address data bus
73
V
SS
GND
IN
GND
74
V
CC
3.3V
IN
Power source
75
INT4
IN
NC (3.3V pull up)
76
SYSAD32
SYSAD32
IN/OUT
ASIC(KZ4H167V06)
System address data bus
77
SYSAD0
SYSAD0
IN/OUT
ASIC(KZ4H167V06), 16M FLASH,
8M FLASH, 74LVC16245
8M FLASH, 74LVC16245
System address data bus
78
INT3
PARINTR_
IN
ASIC(KZ3H008302)
Print request interruption input
79
V
SS
GND
IN
GND
80
V
CC
3.3V
IN
Power source
81
INT2
INTR2_
IN
ASIC(KZ4H167V06)
ASIC interruption 2
82
SYSAD16
SYSAD16
IN/OUT
ASIC(KZ4H167V06), 16M FLASH,
8M FLASH
8M FLASH
System address data bus
83
SYSAD48
SYSAD48
IN/OUT
ASIC (KZ4H167V06), 16M FLASH,
8M FLASH, 74LVC16244
8M FLASH, 74LVC16244
System address data bus
84
INT1
INTR1_
IN
ASIC(KZ4H167V06)
ASIC interruption 1
DM-1505
11 – 15
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