Sharp AR-C240P Specifications Page 15
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Figure 2-3
The engine control block (PU) is controlled by the engine controller board (K71 PWB) which
consists of a CPU (MSM66Q577), general LSI chip, flash ROM, EEPROM, pulse motor drivers and
a video memory (see Figure 2-3).
(1) CPU
This, a 16-bit CPU with an AD converter (OKI MSM66Q577), controls the entire system.
(2) General LSI
2.2 Engine Controller Board (K7N PWB)
OPTION TRAY
INT
28MHz
CPU
MSM66Q577
FLASH
MCON
LSI
SRAM
EEPROM
CONTROL
PANEL
MOTOR
DRIVER
PULSE
MOTOR *9
GEARED
MOTOR
CLUTCH
LED HEAD (K)
LED HEAD (Y)
LED HEAD (M)
LED HEAD (C)
PU FAN
FUSER FAN
ID, BELT,
FUSER
CHECKS
CLOCK
GENERATOR
DCON
LSI
MOTOR
DRIVER
CLK
RESET
DUPLEX
PAPER SIZE
STACKER FULL
CU
SDRAM
SDRAM
PAPER THICKNESS
SENSOR
COROR REGISTRATION
SENSOR
COVER OPEN
(UPPER, STACKER, RIGHT SIDE)
1ST TRAY SENSORS
(PAPER END, PAPER NEAR END)
PAPER FEED SYSTEM SENSORS
(PAPER FEED, PAPER
REGISTRATION, EJECT)
MT SENSORS
(STAGE POSITION, PAPER END)
DISPOSAL TONER SENSOR
HEAT ROLLER TEMP
OHP
TEMPATURE
HUMIDITY
HEAD TEMP
DENSITY
ANALOG
SW
32MHz
HIGH VOLTAGE POWER
SUPPLY SERIAL INTERFACE
This LSI (UPD65454GD-241-LML, UPD65946GD-137-LML), which is contained in the
printer engine control block, incorporates 4 megabits of video memory and has functions
such as engine-controller interfacing, LED interfacing, motor control, sensor input, video
memory control, main scan color misalignment correction, skew correction and high-voltage
power supply control.
- AR -C 240P 1
- CONTENTS 3
- 1. CONFIGURATIONS 6
- 1.1 System Configuration 6
- 1.2 Printer Configuration 7
- 1.3 Supplies and Consumables 8
- Option Configuration 9
- 1.4 Specifications 10
- 2. OPERATION DESCRIPTION 12
- 2.1 Main Board (TIG PWB) 13
- 2.3 Power Units 16
- Disconnect 17
- [Maintenance Tools] 18
- Table 2-1 Maintenance Tools 18
- 2.2 Parts layout 19
- For 600dpi 20
- [Printer Unit-1/2] 21
- Figure 2-3 21
- [Printer Unit-2/2] 22
- Figure 2-4 22
- [Cassette Guide Assy (L),(R)] 23
- Figure 2-5 23
- [Duplex Unit] 24
- Figure 2-6 24
- 2.3 Replacing Parts 25
- 2.3.1 Top Cover 27
- (1) Open the Top Cover assy 27
- Figure 2-3-1 Top Cover 27
- 2.3.6 Eject Guide Assy 32
- (1) Remove the cassette 1 34
- 2.3.11 Face-Up Tray 37
- Figure 2-3-11 Face-Up Tray 37
- 2.3.15 Drum Contact Assys 41
- Stage height adjustment jig 43
- Top surface 43
- 2.3.20 Main Cooling Fan 46
- Connectors 47
- 2.3.22 Duplex Guide Assy 48
- Main chassis 52
- 2.3.27 Entrance Sensor PWB 53
- 2.3.30 Exit Sensor Assy 56
- 2.3.42 Fuser Unit 68
- (1) Open the top cover 1 68
- Figure 2-3-42 Fuser Unit 68
- 2.3.44 Duplex Unit 70
- Figure 2-3-44 Duplex Unit 70
- 3. ADJUSTMENT 76
- 3.0 System Maintenance MENU 76
- Maintenance Menu 78
- SWITCH SCAN 80
- MOTOR & CLUTCH TEST 84
- BLACK - ID MOTOR 84
- Figure 3-3 85
- Table 3-2 85
- TEST PATTERN 86
- Pattern 5 Pattern 6 88
- Pattern 7 88
- MTR=*.**KV CTR=*.**KV 89
- P=*** T=*** U=***[###] 89
- H=***% L=***[###] 89
- KTR=*.**KV YTR=*.**KV 89
- NV-RAM INITIAL 90
- TOTAL SHEETS FEED 91
- BLACK IMPRESSIONS 91
- YELLOW IMPRESSIONS 91
- MAGENTA IMPRESSIONS 91
- CYAN IMPRESSIONS 91
- 3.1.2.9 Panel display details 92
- Panel display 92
- Details of jam error display 96
- Value Check 101
- Measurement point 104
- 2-Character correction value 108
- Code content Barcode 108
- 5. TROUBLESHOOTING PROCEDURES 111
- 5.5 Troubleshooting Procedure 112
- Back-up roller thermister 128
- Heat roller thermister 128
- DIAGNOSTIC MODE 139
- XX.XX.XX 139
- Charge Roller 144
- Developing Roller 144
- Toner Supply Roller 144
- 5.6 Fuse check 145
- 6. CONNECTION DIAGRAM 146
- 6.1 Resistance Checks 146
- Feeder Motor 148
- Duplex Motor 148
- 6.2 Program/Font ROM Layouts 150
- (2) Main Controller PWB 152
- (6) N71 PWB 154
- Item Description 156
- INPUT. PRIME 157
- ACKNOWLEDGE 157
- 1. Parts Replacement 160
- APPENDIX C ERROR MESSAGES 165
- 1. Error messages 165
- 5. Other Warnings 177
- PARTS GUIDE 179
- (1) Main Assembly 1/3 181
- (1) Main Assembly 2/3 182
- (1) Main Assembly 3/3 183
- (2) Top Cover Assembly 185
- (2) Top Cover Assembly 186
- (3) Printer Unit Chassis 1/2 187
- (3) Printer Unit Chassis 2/2 188
- (3) Printer Unit Chassis 189
- (4) Paper Tray Guide 191
- (4)Paper Tray Guide 192
- (5)Duplex Unit 193
- (5) Duplex Unit 194
- ALL RIGHTS RESERVED 196
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