Sharp ER-A440 User Manual Page 49
- Page / 52
- Table of contents
- BOOKMARKS
- SERVICE MANUAL 1
- CHAPTER 1. SPECIFICATIONS 2
- 3. Mode switch 3
- 4. Display 3
- 5. Printer (DP-730) 3
- 6. Drawer 4
- CHAPTER 2. OPTIONS 5
- 2. Options 6
- 3. Service options 6
- 4. Service tools 6
- 5. Supplies 6
- 6. Options 6
- CHAPTER 3. SRV. RESET AND 7
- MASTER RESET 7
- 1. Hard ware block diagram 8
- 2. Description of main LSI’s 9
- 2) Block diagram 10
- 3) Pin description 11
- 2-2. G.A (MPCA7) 12
- I/R Control 13
- 2-3. CKDC8 15
- 3. Clock generator 16
- 4. Reset (POFF) circuit 16
- 1) Memory map 17
- (OPTION) 18
- 1) Block diagram 19
- 2) SSP register 19
- 3) SSP register access method 20
- Relation ship among RP/HP/DP 21
- 7) Caution 22
- 1) Power on sequence 22
- 10. Power supply circuit 23
- (Not used) 24
- Key code 24
- 1 2 3 4 5 6 7 8 9 0 25
- 1 0 6 X-X 26
- 7-SEGMENT DISPLAY: 27
- [12] Standard ROM test 28
- [14] Option RAM test 28
- Normal end 29
- NGRS TEST ER XX 29
- RS TEST OK 29
- CHAPTER 6. DOWN LOAD 30
- FUNCTION 30
- (Baud rate setting: #903-A) 31
- 7. Operational method 32
- CHAPTER 7. SERVICE PRECAUTION 33
- POWER SUPPLY(MAIN PWB) 34
- 1. MAIN PWB CIRCUIT DIAGRAM 34
- CPU(HD6415108) 35
- GATE ARRAY(MPCA7) 36
- Not moun ted 37
- OPTION MEMORY (OPT CN) 39
- PRINTER & SENSER 40
- DISPLAY DRIVER(CKDC8) 41
- KEY I/F(MAIN PWB) 42
- 2. MAIN PWB LAYOUT 44
- (2) SIDE B 45
- 3. FRONT PWB/POP UP PWB 1/1 46
- 4. FRONT DISPLAY PWB 47
- 5. POP-UP PWB 1/1 48
- 6. POP-UP DISPLAY PWB 49
- 7. PS PWB 50
- 8. PS PWB 51
- SHARP CORPORATION 52
- Information Systems Group 52
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