Sharp ER-A770 Service Manual Page 19
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Check point address = 800000H,800001H
800002H,800004H
800008H,800010H
800020H,800040H
800080H,800100H
800200H,800400H
800800H,801000H
802000H,804000H
808000H,810000H
820000H,840000H
880000H,900000H
Display
The screen displays the capacity of RAM in the unit of 64 KB.
The error address and the bit are displayed only when the error
occurs. (If the error does not occur, they are not displayed.)
Terminating procedure
After completion of check, press the CANCEL key.
3-3. ROM & SSP Diagnostics
The standard ROM and the service ROM are checked. The SSP
circuit is also checked.
The following menu is displayed. The cursor position is highlighted.
Use
key and key to move the cursor. Move the cursor to the
process you desire and press the enter key. The selected individual
diagnostics program is executed.
1) Standard ROM Check
Check contents
The standard ROM area (200000H ~ 3FFFFFH) is added in the
unit of byte. If the lower two digits of the result is 20H, it is normal.
The ROM version and the model name code which are stored in
address 31FFE0H ~ 31FFEFH where the ROM version and the
check sum correction data are stored are displayed. The format of
data (ASCII) to be stored is as follows:
31FFE0H ~ 31FFEFH: Model name code (example: ER-A770.
Display is made up to 00H of data.)
31FFF0H ~ 31FFF9H: 27801R****(****=PROGRAM VERSION)
31FFFAH ~ 31FFFBH: BLOCK NO. ("20" ~ "3F")
31FFFCH: TERMINATOR ("=")
31FFFDH ~ 31FFFEH: BLOCK VERSION (example "00")
31FFFFH: CHECK SUM CORRECTION DATA
The flash ROM used as the standard ROM has rewriting block of
64KB as the unit. To control the version in each block, the compo-
sition is the same as the above 31FFF0H or later and arranged in
each 64KByte. At that time, correction is made so that the sum of
each block becomes 01H, and the total of 2MByte is 20H.
The program version of the IPL is displayed so that 0PAGE
(BLOCK) where the IPL is stored is individually controlled.
Display
The screen displays the capacity of RAM in the unit of 64 KB.
Terminating procedure
After displaying the check result, press the CANCEL key to termi-
nate the check.
2) SERVICE ROM Check
Check content
For the SERVICE ROM area (D00000H ~ EFFFFFH) consisting of
two EPROMs, addition is made in the unit of byte for each chip.
The lower two digits of the result are 10H, it is regarded as normal.
The ROM version and the model name code which are stored in
address D1FFE0H ~ D1FFFFH where the ROM version and the
check sum correction data are stored are displayed. The format of
data (ASCII) to be stored is as follows:
D1FFE0H ~ D1FFEFH: Model name code (example: ER-A770.
Display is made up to 00H of data.)
D1FFF0H ~ D1FFF9H: 27801R****(****=PROGRAM VERSION)
D1FFFAH ~ D1FFFBH: BLOCK NO. ("20" ~ "2F")
D1FFFCH: TERMINATOR ("=")
D1FFFDH ~ D1FFFEH: BLOCK VERSION (example "00")
D1FFFFH: CHECK SUM CORRECTION DATA
This SERVICE ROM allows to write into the FLASH ROM when
re-execution is impossible because of an abnormality during re-
writing into the FLASH ROM. The composition is the same as the
standard ROM.
The program version of the IPL is displayed so that 0PAGE
(BLOCK) where the IPL is stored is individually controlled.
Display
The screen displays the capacity of RAM in the unit of 64 KB.
Terminating procedure
After displaying the check result, press the CANCEL key to termi-
nate the check.
UP-P02MB2 Check
Extended RAM size : 2048KB PASS!!(or ERROR!!)
Error Address xxxxxxH
Write Data xxxxH
Read Data xxxxH
ROM & SSP Check
Service ROM Check
SSP Check
Standard ROM Check
Standard ROM Sum Check : PASS!!(or ERROR!!)
IPL PROGRAM Version
**
APL PROGRAM Version
← Displays the version.
27801R**** ER-A770
27801R**** ER-A770
BLOCK Version
20=**,21=**,22=**,23=**,24=**,25=**,26=**,27=**
28=**,29=**,2A=**,2B=**,2C=**,2D=**,2E=**,2F=**
:
Service ROM Sum Check 1 : PASS!!(or ERROR!!)
Service ROM Sum Check 2 : PASS!!(or ERROR!!)
IPL PROGRAM Version
**
APL PROGRAM Version
←
Displays the version.
27801R**** ER-A770
27801R**** ER-A770
BLOCK Version
20=**,21=**,22=**,23=**,24=**,25=**,26=**,27=**
28=**,29=**,2A=**,2B=**,2C=**,2D=**,2E=**,2F=**
:
- SERVICE MANUAL 1
- CHAPTER 1. SPECIFICATION 2
- 3. Display 4
- CHAPTER 2. OPTIONS 5
- ER-A770 bus connector 7
- CHAPTER 3. SERVICE PRECAUTION 8
- IPL from IR 10
- Connected 115200 10
- 21 22 23 24 25 26 27 28 10
- SENDING 00000 11
- 4. Note for handling of LCD 12
- 6. Others 12
- SRV. reset 13
- MRS-1 Key 14
- Symbol/PartsCod) 15
- MRS-3 Key 16
- ENTER PASSWORD 16
- 1. General 17
- 2. System configuration 17
- 3. Diagnostics 17
- 3-2. RAM Diagnostics 18
- UP-P02MB2 Check 19
- Error Address xxxxxxH 19
- Write Data xxxxH 19
- Read Data xxxxH 19
- 3-5. RS232 I/F Diagnostics 20
- RS232 CH1 Check 21
- ER-DR : ERROR!! 21
- Rear Display Check 23
- • Satellite machine setting 24
- • Master machine setting 25
- Magnetic Card Reader Check 26
- TRACK1:BUFFER EMPTY 26
- TRACK1:MCR ERROR 26
- TRACK2:BUFFER EMPTY 26
- TRACK2:MCR ERROR 26
- 1. Hardware block diagram 27
- 2) Block diagram 29
- 3) Pin description 30
- 2-2. G.A.(MPCA8) 31
- 2-3. OPC2 35
- 1) Features 38
- 2) Pin configuration 38
- 3) General description 39
- 4) Pin description 39
- 2) General description 39
- 3) Pin configuration 40
- 4) Functional description 40
- 5) Pin description 40
- DMA CONTROLLER 41
- 1) FEATURES 41
- 2-7. MB62H149 42
- 1) Pin Configuration 44
- 2-9. CKDC9 (HD404728B02FS) 46
- (MAX4MB) 48
- 4. LCD display 49
- 5. Customer display 49
- 6. Pseudo SRAM (Standard) 50
- 7. NOR-type flash memory 50
- 8. SSP control 50
- 9. Interrupt control 50
- 10. WAIT control 51
- 11. CKDC9 51
- 12. Option RAM interface 51
- 13. Reset sequence 52
- 14. Drawer 52
- 16. RS232 53
- CHAPTER 8. CIRCUIT DIAGRAM 54
- FLASH ROM 56
- ODD SIDE 57
- EVEN SIDE 57
- +24V/+5V POWER CIRCUIT 65
- DC-DC CNV CIRCUIT 66
- CONNECTOR 67
- 2. CKDC PWB 68
- 3. INVERTOR PWB 70
- 4. N/F PWB 71
- 2. Main PWB (Side-B) 73
- 3. Mother PWB 74
- 4. CKDC PWB 74
- 5. Inverter PWB 75
- 6. Noise filter PWB 75
- PARTS GUIDE 76
- 1 Top cabinet etc 77
- 2 Bottom cabinet etc 79
- 4 Main PWB unit 81
- 5 Mother PWB unit 84
- 6 CKDC PWB unit 84
- 7 NF PWB unit 85
- 8 Inverter PWB unit 85
- 9 Service tools 85
- 10 Supply 85
- PARTS CODE NO 86
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