R
BN-10 (ZX-456)
BN-20 (ZX-457)
NOV. 1997
(without price)
BN-20
-- 2 --
CONTENTS
1. SPECIFICATIONS ................................................................................................ 3
2. GENERAL GUIDE
2-1. Appearances and Display Indicators ....................................................... 5
2-2. Modes and Cursor Keys etc. .................................................................... 7
2-3. Backlight Operation (BN-20 only) ..........................................................13
2-4. Power Supply ...........................................................................................14
3. RESET OPERATION and BATTERY REPLACEMENT
3-1. Reset Operation ....................................................................................... 16
3-2. Battery Replacement ...............................................................................18
4. DATA COMMUNICATION
4-1. General .....................................................................................................24
4-2. Connecting the CASIO BN Unit to PC ................................................... 25
4-3. PC sync for Windows (Brief explanation) ............................................. 27
5. OPERATION CHECK
5-1. To enter the operation check mode .......................................................29
5-2. Operation Check ......................................................................................30
6. ERROR MESSAGES .......................................................................................... 38
7. TROUBLESHOOTING ....................................................................................... 40
8. LSI PIN FUNCTION
8-1. CPU ...........................................................................................................41
8-2. Gate Array ................................................................................................ 42
9. CIRCUIT EXPLANATION
9-1. Block Diagram .........................................................................................44
9-2. Power Supply ...........................................................................................45
9-3. Function ................................................................................................... 46
10. SCHEMATIC DIAGRAMS ..................................................................................48
11. DISASSEMBLY
11-1. Disassembly for keyboard side .............................................................. 58
11-2. Disassembly for display side ................................................................. 59
12. PARTS LIST .......................................................................................................60
13. EXPLODED VIEW ..............................................................................................63
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1. SPECIFICATIONS
Model: BN-10/BN-20
Main Modes:
SCHEDULER (SCHEDULE, TO DO, REMINDER); CONTACTS; MEMO; EXPENSE MANAGER;
SPREADSHEET; CLOCK (Home Time, World Time); Pop-Up Tool (Calculator, Clock)
Data storage:
Storage and recall of SCHEDULE, TO DO, REMINDER, CONTACTS, MEMO, EXPENSE data; cal-
endar display; secret memory area; editing; memory status display
Clock:
World Time; SCHEDULE alarm; TO DO alarm; REMINDER alarm; Daily Alarm; accuracy under
normal temperatures:
±3 seconds per day
Calculations:
12-digit arithmetic calculations; arithmetic constants (+//
× /÷); independent memory; percentages;
square roots; 24-digit approximations; other mixed calculations
General:
Display:
319
× 160 dots
Memory capacity:
1MB (BN-10)
2MB (BN-20)
Main component:
LSI
Power supply:
Two AA-size alkaline batteries (Type: LR6 (AM3)) or optional
AD-A70140 AC adaptor
Battery life:
(Ambient Temperature: 20
°C)
BN-10:
· Approximately 100 hours of continuous display only in the CON-
TACTS Mode
· Approximately 80 hours with 55 minutes of continuous display
only and 5 minutes of processing operation per hour in the CON-
TACTS Mode
· Approximately 500 minutes, continuous connection of optional fax
modem
BN-20:
· Approximately 100 hours of continuous display only in the CON-
TACTS Mode
· Approximately 80 hours with 55 minutes of continuous display
only and 5 minutes of processing operation per hour in the CON-
TACTS Mode
· Approximately 65 hours with 55 minutes of continuous display
only and 5 minutes of processing operation per hour in the CON-
TACTS Mode, plus 3 minutes of backlight operation per hour dur-
ing continuous display only period
· Approximately 500 minutes, continuous connection of optional fax
modem
Power consumption:
0.6 W (MAX)
0.4 W (TYP)
-- 4 --
Current consumption: at battery voltage = 3 V, at data transmission with MODEM
Note: Value measured actually
139 mA (at battery voltage = 3 V, at data transmission with MODEM)
74 mA (at AC Adapter = 5 V, at data transmission with MODEM)
Low power voltage: See to SCHEMATIC DIAGRAMS
· Battery voltage (T651(VCC) T652(GND))
2.1 V
± 2.0 % Low battery message appears
1.6 V
± 2.0 % Forced power off
· AC Adapter voltage (T661(VCC)T652(GND))
4.5 V
± 2.0 % Forced power off
Auto power off: Approximately 6 minutes after last key operation
Operating temperature: 0
°C ~ 40 °C (32 °F ~ 104 °F)
Dimensions:
Unfolded: 11H
× 167W × 162.5D mm (3/8"H × 6 5/8"W × 6 3/8"D)
Folded:
22H
× 167W × 88D mm (7/8"H × 6 5/8"W × 3 1/2"D)
Weight:
BN-10: Approximately 270 g (9.5 oz) including batteries
BN-20: Approximately 275 g (9.7 oz) including batteries
Typical value Maximum value
146 mA
200 mA
-- 5 --
2. GENERAL GUIDE
2-1. Appearances and Display Indicators
Display
Mode keys
Cursor keys
Option port
Keyboard
Lock
Mini Cradle port
AC adaptor
connector
P button
Battery switch
RESET button
Option lock switch