Manual / Guide · c. 1975
Unisonic 790R Instruction Manual
The 16-page manual of the Unisonic 790R pocket calculator, with NiCd, dry-cell and adapter operation.
Manual / Guide · c. 1975
The 16-page manual of the Unisonic 790R pocket calculator, with NiCd, dry-cell and adapter operation.
Unisonic® 790R=—= mum = «8 DIGIT POCKETABLE CALCULATOR =zmm wih WV} &) &2 Ww 790R -C INSTRUCTION MANUAL FEATURES AND SPECIFICATIONS 1. DtSPLAY SRR 8-digit capacity Zero suppression Minus sign Memory sign Overflow condition indicater 2. FUNCTIONS Sean ee Addition, subtraction, multiplication, division, repeating addition and subtraction, credit balance, automatic constant calculation for multiplication and division, percentage calculation, add-on/discount function, exchange, sign change, memory caiculation, square root calculation. 3. SPECIAL FEATURES SR 1} Automatic all-clear function at “Power-On” condition. 2) Display indications for: a) memory function, b) overflow condition. 3) Accumulating memory. 4) 8-digit capacity, Zero suppression. 5) Full floating decimal point system. POWER SOURCE sane Ni-CD cells (NR-AA) 1.2Vx4, Dry cells (UM-3) 1.5Vx4, or by AC Adaptor. . POWER CONSUMPTION ERE EES 0.4 (W) DIMENSIONS (eras 1-2/5 inches(H)} x 3-1/2 inches(W} x 6-1/10 inches(L) . WEIGHT See 9-3/5 oz. (with Ni-CD cells) ELEMENT te MOS-LSI complete 1 chip. KEYBOARD ORGANIZATION AND KEY DESCRIPTION (0)-[8) Numerical entry keys. Keyboard Organization View Gees 8a 48) 6) Us Ow OOe8 S (:} Decimal point key Plus key Used for addition. (=) Minus key Used for subtraction. Multiply kay Used for multiplication, ] Division key Used for division (=} Equal key Express results of an arithmetic process. Clear and Clear entry key Used for all clear and clear entry. Depress once : Clear entry. Depress twice: All clear. Sign change key €) Exchange key (%| Percentage key Used for percentage calculation, (V'} Square root key Used for square root calculation. {| Claar memory key Clears the memory registor. Recall memory key Displays the contens of the memory. i} Memory plus key Used for Add. to memory. fi-] Memory minus key Used for Sub from memory. CALCULATION EXAMPLES (1) ADDITION | 5+3=8 | 5 36@-—-—— 8. {2} SUBTRACTION 6-2=4 | 6 | 2 ———» 4, (3) NEGATIVE BALANCE |}4-9=-5 | Digit 9 (Minus sign) Note: NEGATIVE NUMBER INDICATOR This indicator is located in the leftmost display position and lights whenever negative numbers or credit balances are displayed. (4) MIXED ADDITION, SUBTRACTION {3-7+8=4 | 30788 & ——— 4. (5) MULTIPLICATION {5.2 x 6.3 = 32,76 | 5.2 6.3 32,76 (6) DIVISION 1124 +04 = 31 | 124 (3) 4 & ——— 31. (7) MIXED MULTIPLICATION, DIVISION CALCULATION | 8x6+12=4 | 8 xX) 6 & 12 & —— 4. rs (8) PERCENTAGE CALCULATION | How much is 20% of 2007 | 200 {x} 20 40. | How much % is 200 of 400? | 200 (=) 400 50. (9} AUTOMATIC MARK-UP | A $47.25 Purchase Pius 4% Tax. | 47.25 4 (=) 49.14 (10) AUTOMATIC DISCOUNT [ A $15.25 Item Discounted 20% _ | 15.25 —) 20 wm & 12.20 (141) POWER 2 ee 2 16. (12) REPEATED CALCULATION (a) Addition | 20+4+44+4 32 | —oes, oot 20 4 Ge —— 32. {b) Subtraction [| %8-2—-2—2 = 12 | (X} me N (4 ON wWwE26 Fe 12. (13) CONSTANT CALCULATION (a) Multiplication 3x2: 6 3 4x2: 8 5 x 2 = 10 (b) Division 6 + 2 = 3 6 8+2= 4 10 +2 = § _ =) OOO OO 10, - @ (14) . KEY USED CALCULATION 20 5 x (~2} 5 248 20 & = ~2 ¥ 2 Digit 9 (Minus sign) (15) MEMORY CALCULATION | 5x2+8x5—10x2 = 30 | SH 2EGWMs8es5GWMoR2eaWw—, 30. Digit 9 (Memory sign) NOTE: An“. will appear in the leftmost display position whenever the contents of the memory are non-zero. (16) ENTRY CLEAR | 123 + 123 = 246 123 (122 (4) 123 &] ———> 246. (17) SQUARE ROOT CALCULATION Mis-entry VB x 45 = 15 5%) 46 BEFORE OPERATING YOUR CALCULATOR Your unisonic 790R calculator is designed for use principally as a rechargeable unit. Please read the instructions below carefully on the use of rechargeable batteries and charger. 1) 2) 3) 4) 5) 6) Make sure that the power switch is in the “OFF” position. Connect the adaptor plug into the calculator socket. Plug the adaptor into the power outlet. Necessary charging time is about 10 — 15 hours. Overcharging may damage electronic components of the calculator and therefore shorten calculator life. Only nickel cadmium batteries may be used for recharging. Use of any other type of battery for recharging will result in damage to the calculator, If the nickel cadmium batteries do not charge please check: A) If the polarity on the batteries match the polarity (+ or —) on the battery terminals. B) If any of the battery terminals are rusted. C) ff the charging time was indeed 10 — 15 hours. if ail of the above is checked and the batteries are still not charged return to the store where the calculator was purchased and try charging the batteries on the store charger, and with another set of nickel cadmium batteries. Haw to change rechargeable batteries. To change the rechargeable batteries, make sure the power switch is on “OFF. Remove the battery access cover fram the back of the calculator by moving the access cover toward the bottom of the calculator, Remove and discard the old batteries. Before placing in your new batteries note the polarity. Be sure to match the battery polarity with the corresponding terminals, ps NOTE. f if a rechargeable battary pack isto be used. / Be sure to make certain whether the+or — terminal on the battery pack makes contact with the terminals in the battery compartment as shown in the illustration below: TERMINAL @) TEAMINAL SK f’ NICD RECHARGEAELE Sis: HATTERY PACK It is highty recommended that rechargeable batteries be used with this catcu- lator, Since your charger is also your A/C Adaptor. The rechargeable batteries must be removed when the A/C Adaptor is used. To avoid damage use only unisonic Model 623 or Model SY-1200 or Model 620 charger/adaptors for your calculator. In the event that disposable AA pentight or carbon zinc batteries are used no attempt should be made to recharge them as this will result in serious damage to the calculator, Therefore, since the charger is your A/C Adaptor, all disposable batteries should be removed when the A/C Adaptor is used. It is not advisable to switch off between rechargeable and non rechargeable batteries continuously, as this may lead to the effors mentioned above. Do not handle rechargeable batteries unless they need changing or recharging. SERVICE CERTIFICATE Your electronic calculator is a highly precise electronic instrument which will serve you far many years with narmal care. UNISONIC PRODUCTS are quaranteed against defects in materials or workmanship for 4 period of ninety {90) days from date of purchase. This guarantee applies only to the original owner registered on the card below, This card must be completed and mailed, postage paid, within ten (10) days from date of purchase. Any merchandise that has been repaired by an unauthorized party, tampered with, or abused is not covered by this guarantee, If, within (90) days from date of purchase, you send in your calculator to us, please send us also $5.00 to cover postage which includes cost of registered mail with return receipt requested. If you return your calculator after (90) days from date of purchase, then kindly send us a check for $9.90 which covers registered mail with return receipt plus handling charges. Please be sure to include check or money order with package. All merchandise must be returned, prepaid and fully insured, in the original packaging container or in a similarly-constructed container, via U,P.S. where possible. Enclose a letter explaining the problems, with place and date of purchase. All defective units should be returned to ‘ UNISONIC Service Department 16 West 25th Street New York, N.Y. 10010 MODEL NO. DATE OF PURCHASE DEALER’S NAME SERIAL NO. Printed in Japan