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Calculators: Handheld: Brother 202
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Size (approx): | 88mm x
153mm x 33mm(max) (w,h,d) Weight 184g excluding batteries |
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Power: |
6V DC, 4 x AA size batteries. Does accept an adaptor (undefined but 4mm plug, centre positive) through socket on the right side at the top. Battery compartment has a ribbon pull to aid battery extraction. | ||
| Case: | Very sturdy two-piece white smooth plastic case. It has a flat bottom and rounded top. Keyboard has a brushed aluminium surround which matches the two panels below the display. One of these is printed with a black company name and model block. The neutral, angled, display filter also has white printed digit numbers and sign reminders. There is an extensive instruction panel on the back in another aluminium panel. Simple colour scheme works well and the keys are soft touch short travel but work very well. | ||
| Display: | 8 digit blue VFD display with ninth digit for negative, error and memory signs. | ||
| Features: | Standard four functions, percentages, pi, square root, register exchange, sign change and four function memory. | ||
| Age: | 1975 | ||
| Manufacturer: | No manufacturer's name or model number, made in Japan, serial number (label inside battery compartment) 75100343 | ||
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Comments:
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This calculator just oozes quality. Solid feel, bright display, quality keys and good range of functions. No surprise that my example is mint - it's easy to treasure this instrument. |
| Components: | 1 x cpu: NEC µPD278C H58366 28
pin DIL 1 x 9 digit VFD round single tube display 1 x transistor 8 x diodes 7 x capacitors 3 x resistor arrays 6 x resistors 1 x transformer; 30T 475 Sumioa |
| Boards: | The keyboard assembly (Ref KBM-525S) attached to the front by a "tight fit" and to the main cpu board by 13 long flexible wires. |
| Construction: | Undo the three screws on the back and gently lift of the front. The keyboard assembly will separate from the front. |
| Logic comments: | (C) is used once to cancel the last number entered and a second time to clear the whole calculator. |
| There is automatic constant on multiply and divide only | |
| Input overflow is suppressed, inputting a ninth digit is ignored | |
| Negative numbers are shown with a "-" in far right (ninth) digit thereby allowing full eight digit negative numbers | |
| The change sign key "(+/-)" can be used in mid-number entry | |
| Divide by zero shows a "C" in the far right (ninth) digit and "0" and is not recoverable | |
| Overflow shows the result and "C" (or if negative "E") in the far right (ninth) digit and is not recoverable | |
| Memory storage is indicated by the far right (ninth) digit decimal point | |
| Overflow in memory if flagged as divide by zero above and retains the original number |
