Sharp PC-1260, Service Manual

Page 1: ...function inverse trigonometric func tion logarithm exponen tial angle conversion power raising square root extract integer conversion absolute value signum function circle ratio etc Horizontal cursor shift Insertion I NS Deletion DEL Line up and down I l t Editing function Stack System ROM Memory capacity Programming language CPU Computation method Operational capacity 10 digits of mantissa with t...

Page 2: ...PLAY2 4 1 DISPLAY HA HA From HA DIS DIS R W CPU _____ DIS CE AL 01 s CE AL R W F03 t Va TEST BOS R W RESET AL KON o r os DATA F05 Al AOl S ADDR I _____ AS BOl 7 IBl IB4 XOXI _ _ I 1F04 B06 IB6 IB7 I I 7 7 FOl 2 IB5 BS I CEA0 13 01 8 R W A0 10 01 8 Key Matrix 51 Key ONKey ROM 32K RAM 2K SI ide SW SC613256FG53 HM6 l 16 X 2 CE 1 CE Buzzer c J L Sell ACK BUSY 1 Din Al3 CE CE2 Sel2 Dout Va F04 I I l l ...

Page 3: ...put key strobe output normally low but pulse issued with a key operation 21 iB8 In ACK signal which enables the 1 0 PCU to read data from the CPU 22 iB7 In Data in signal Din which is a serial data input from the PCU bit unit serial handshake 23 iB6 Out SE L2 select output P type open drain 24 iB5 Out SE L 1 select output P type open drain 25 iB4 In Slide switch input 26 iB3 Out Key strobe output ...

Page 4: ...s line normally high impedance 55 06 In Out Data bus line normally high impedance 56 o5 In Out Data bus line normally high impedance 57 o4 In Out Data bus line normally high impedance 58 o3 In Out Data bus line normally high impedance 59 o2 In Out Data bus line normally high impedance 60 o1 In Out Data bus line normally high impedance 61 Fo5 Out 32K ROM chip enable 62 Fo4 Out Option RAM chip enabl...

Page 5: ...VAH Segment output waveform HI H2 H3 H4 HS HS H7 HS H9IHIOIHll Hl2 Hl3H14i H H2 H3 H4 HS hi TRI h2 TR2 h3 TR3 h4 TR4 h5 TR5 RES HA DIS 4 3 Counter section and segment outp ut wave forms NOTE Voltage when VDIS is 7 0V 7 0V Vs 5 6V 4 2V 2 sv L4V 0 1 GND Retains the state at the time of OFF HA DIS Display ON Power OFF _____ _ ____ __ CPU at standby Display OFF 4 2 LCD timings The 24 digit liquid crys...

Page 6: ... H L L H L H H H H H H H L L L H L H H L H H H H H H L L H H L H H H L H H H H H L L L L H H H H H L H H H H L L H L H H H H H H L H H H L L L H H H H H H H H L H H L L H H H H H H H H H H L Truth table SELECT ENABLE Y7 Vss DATA OUTPUT A B c GM G2B Gl I VDD Y6 DATA OUTPUTS Pin configuration F04 Al3 Al2 All Output 0 0 0 0 RAMl 0 0 0 1 II 2 0 0 1 0 II 3 0 0 1 1 II 4 0 1 0 0 II 5 7 1 PC 1261 decoder ...

Page 7: ... PC 1261 flat type PWBcircuitdiagram Since the first production unit the P COS type RAM unit 2 KB x 5 has been used for the PC 1261 memory PWB unit But in some of PWB unit in future it may be superseded by the flat type PWB unit that consists of the 8 KB flat packaged RAM UPD4364G 20L composed of the flat packaged the P COS type RAM 2 KB x 4 and the 2 KB RAM HM6116 or TC5711 The P COS type PWB uni...

Page 8: ...AT type 0 CAN NQA E 10 C CE u NC SC6 I 3256FG53 GND VGG 04 AS 08 CBA 18 s l HO VJ l A9 AO AO Al4 c I F04c J FOS c J OI Ii 08 R Wc J 8 2 PC 1261 memory PWB P COStype _________ _J 6FG76 1650s t 07 t 06 _______ 05 ______ t 104 t OM I 1 1 L __ l lckaged 116 or PES ...

Page 9: ...hip I I Chip RAM3 RAMl 2K byte RAM 2K RAM chip SC613256FG53 1 I 2K RAM chip 2 Addre s A 0 A 10 E r izi jtl jt g Zi µ gg gm j R W li 4 VGG HA 32K ROM 3 Data bus 01 08 1 I I I I I 4 DISPLAY2 SC43536 DJSPLAYl SC43536 t Segment Segment SI 562 I 5 6 CIRCUIT DIAGRAM ...

Page 10: ...l f 1 h B fill Diode L2 For OTHER COUNTRY Except for JAPAN ote t 7 Y f 7 0 A i i T2SC2812 L5 L6 c___ _ ACK DIN MTout 1 613256FG53 BUSY 32K ROM D out I I L _ l Kn ter mi nal i Sign name I I MTout2 GND 4 7Kn Kn L __ J 100PFX 2 MT in AO SC61860All ESR H CPU IA4 0 lµF GND Lithium batter CR2032 __ l 3 3 µ_F_V M xz v VR 20Kn Vue Bl L2 22 n ...

Page 11: ...f l filc t c H A H __ l H 1 D B A DISPLAY2 SC43536 DISPLAY SC43536 t GND Addre s A AlO R W VGG 3 2 K ROM 2 CET 22Kn Cf2 SC613256FG53 2 K byte 2K byte RAM RAM2 HM 6116 HM6116 Sl 560 Segment Segment S l S62 I 3 4 5 6 PC 1260 PC 1261 10 CIRCUIT DIAGRAM ...

Page 12: ...1J fO li B t f llJ Diode L2 For OTHER COUNTRY Except for JAPAN ore t 7 J J t 7 _ A 7 i3 C 2SC2812 L5 L6 SEL2 SEL ACK DIN MT out l MT in GND D out BUSY I t er mina l Signa l name I MT out 2 lOOKfl 4 7Kfl AO lOOK l I __ J CPU ESR H SC61860All 56KO GND Lithium batter CR2032 ___ l _3_ 3_µF y X2 Vo JS Vue L2 22fl ...

Page 13: ... 13 11 PARTS SIGNALS POSITION 11 1 Main PWB ...

Page 14: ...CZZ t 2 l _ wc11 fJ2 1J s t OJhi0 Jumper wire JlandJ2 For JAPAN only PC 1261 PC 1260 m tt r Not used Buzzer t l 1 t L21ilfij 1 fl t 7 t OJhJ0 B t ffl Diode L2 For OTHER COUNTRY Except for JAPAN S 59 3 A i lU 5000tl J h March 1984 Product Ion l 5000sets only im Production x 7 i fl 7 YA i C2SC2812 L5 L6 All chip type transistor is 2SC2812 L5 L6 ote 11 2 PC 1260 memory PWB PC 1260 PC 1261 ...

Page 15: ...QTA 6 LCH 7 PGU 8 RAL 9 DUN DUN 10 PSL 13 P F i 14 PTP 15 P F i 16 J K N 17 J K N 18 J K N 19 J KN 20 J K N 21 J K N 22 J K N 23 QCN 24 MSL 25 PS L 26 PGU 27 DUN DlJN 100 PTP 101 PZE I Exte 15 21 27 _____ 16 17 18 19 16 20 D __J__ r_ J L r __ L J l 1 1 iloErll i liG i lsRKl i0 G 011 1 L i __ Jl ll JL J I I L __J r I k 0 cu J0 10 G 0 2 I I I I 0 J J cgBJ 0 0 0 01 I I I I I I 0 0 lrnTERI i 0 D GJ D ...

Page 16: ...0 DUNTK7941CCZZ BR N E Main PWB unit 0 2J Main PWB unit NO PARTS CODE PRICE NEW PART DESCRIPTION PC C RANK MARK RANK 1260 261 1 XBSSC20P08000 AA c Screw 2X8 0 2 HDECA2082CC18 AF N D Bottom panel 0 HDECA2082CC17 AF N D Bottom panel 3 PZETL1491CCZZ AC c Insulator sheet 0 G DUNTK7997CCZZ BQ N E Memorv PWB unit 0 4 DUNTK7998CCZZ BX N E Memorv PWB unit P COS tvne 0 D U N T K 8 1 8 9 C C Z Z BX N E Memo...

Page 17: ...sso ry NO PARTS CODE PRICE NEW PART DESCRIPTION PC PC RANK MARK RANK 1260 1261 2 VH i HM6 l l 6 C AZ B IC HM6116 0 3 VHiTC40HOOOFN AG B IC TC40HOOOFN 0 4 VHiTC40Hl38FN AQ B IC TC40Hl 38FN 0 5 VHi 613256FG53 BD N B IC SC613256FG53 0 0 VHi 613256FG76 BD N B IC For flat type memory PWB SC613256FG76l 0 6 VHiD4364G20LN BR N B IC For flat type memory PWB UPD4364G 20Ll 0 7 VRS TP2BD223J AA c Resistor l 8...

Page 18: ...SHARP CORPORATION Industrial Instruments Group Reliability Quality Control Department Yamatokoriyama Nara 639 11 Japan 1 984 July Printed in Japan SHARP PC 1260 PC 1261 ...