TONO THETA 5000E Service Manual Download

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Summary of Contents for THETA 5000E

Page 1: ...TONO e SOOOE SERVICE MANUAL Pinkboy1006...

Page 2: ...ATION CIRCUIT 8 CPU AND THE AROUNDS 9 10 11 12 13 14 15 FRONT PANEL KEYBOARD SWITCH BOARD CLOCK PRINTER PORT KEYING CIRCUIT VIDEO CIRCUIT SPARE PARTS LI ST BLOCK DIAGRAM SUPPLEMENT SERVICE MANUAL OF B...

Page 3: ...and 12VDC outputs PROBLEMS 1 Over current including fuse cut 13 8V l Is there any short circuit at 030 DBA30 D32 RD30E or the eouivalent 30V zener diode 2 Does the over current run even when CNS is re...

Page 4: ...great voltage s measured at the SVDC and 12VDC outputs when the power supply board is in no load state with CN8 removed the unit is considered to be in normal state in case the rated voltage is obtain...

Page 5: ...x PC3 CPU dividing TP 5 8 8255 8031 LS373 1456 LS73 LS145 80 PB3 4 IC35 IC36 ICll 2 IC40 IC23 ICS ICS LS51 MAl 250 125KHz VR15 S4 9a cw LPF for CW IC27 324 LPF for LOW TONE IC27 324 LPF for HIGH TONE...

Page 6: ...OT OUT N 2119 7 Hz 170 OUT R 2294 7 Hz H T 425 OUT R 2552 3 Hz 850 OUT R 2979 2 Hz don t care PROBLEMS 1 Accurate frequency is not obtained 1 System clock may not be set to 8 004MHz Check TP13 2 Eithe...

Page 7: ...6 Hz TP4 1 6 1 8Vpp OUT N 1276 l Hz 2 2 TP5 l 6 l 8Vpp 170 Otrr R 1445 8 Hz 2 5 TP4 1 6 1 8Vpp L T Vpp 425 Otrl R 1701 5 Hz 1 3 TP4 l 6 l 8Vpp 850 OUT R 2119 7 Hz 1 4 TP4 l 6 l 8Vpp BAUOOT Vpp Otrr N...

Page 8: ...stage of B P F ___ Check IC38 3301 IC39 3301 TR1 2SC536 and TR2 2SC536 and check if the circuit is disconnected or short circuit between the AF IN jack and TPl 2 Excessive signal is output from TPl __...

Page 9: ...14051 VRl xl VR2 J x2 7 VR3 x3 VR4 h x4 VR5 7 x5 VR6 x6 J VR7 x7 t VR8 FINE TUNING IC39 3301 IC33 14066 MARK FILTER IC43 14052 _i VR9 xO VRlO xl VRll I x2 VR12 _h x3 I TPS C j to Detection Circuit 7...

Page 10: ...st cor responding trinmer potentiometer to get maximum output from TP4 and TPS Maximum amplitude should be l 6Vpp through 1 8Vpp PROBLEMS 1 No normal signal is output in spite normal signal is sent to...

Page 11: ...unit in the following state MODE BAUDOT TONE L T SHIFT SHIFT l70 OUT R SPEED L S AF IN IN N AFSK GAIN MAX FINE TUNING VOLUME center Turn VR13 to minimum then turn it clockwise gradually till the fifth...

Page 12: ...hat amplitude of TP6 through TPS is as shown in Fig 3 4 Make sure that the waveform of TP6 through YPS does not change even when the THRESHOLD control is changed to FTL Make sure that the waveform rem...

Page 13: ...loscope for it is very difficult to judge singly whether the waveform is nonnal or not 3 5 ANTI NOISE Switching AF TTL Switching Input Polarity Switching Circuit IC22 339 IC14 LS02 from AGC from MARK...

Page 14: ...evel of TPS becomes 1 1 1 2V Increase the frequency furthermore to make sure that the output level of TPS becomes 1 0 1 lV when the frequency becomes higher than 1275 Hz and that the 1 pin level of IC...

Page 15: ...aker The input signal sound being monitored is switched by S4 2a and S4 3a The input output signal sound is switched by Pl3 It is controlled by PB6 to inject the bell sound into the audio monitor circ...

Page 16: ...to 6116 CS OE of 8031 and 8255 Fig 5 1 POWER SW ON RESET SW ON POWER SW OFF i _ _ j ____ i 5VDC POWER SUPPLY VOLTAGE RST OUTPUT I i I I 6116 5832 Vu VOLTAGE 6116 VOLTAGE of cs oo approx 4V RESET CPO...

Page 17: ...s away The capacity of Cl16 may be deficient IC22 339 may be defective check 02 03 and 012 2 When power is turned on the reset function is activated properly but no reset function is activated when th...

Page 18: ...ystroke is detected by IC4 14068 and starts the keyboard scan Pll KBSTR is set to H level to enable prograrrming in Cl 14094 The data which is to be programmed in QB is set to P30 One clock pulse is g...

Page 19: ...epted Check ICl 14094 IC2 14021 D1 D8 IC4 14068 and R9 3 The keying of a specified key is not accepted The key switch may be defective 7 SYSTEM CLOCK OSCILLATION CIRCUIT iC3 8 004MHz _ i F _ ___ TP13...

Page 20: ...OOH I 8255 I I I I I 67FFH I 6000H I 6116 0 Program Memory ROM Area RAM 1 0 Area Fig 8 1 Memory Map _________ TCY LHLL 4 LLIV _ TLLPL ALE TLLAX TA PORT 2 6Q0fffi P2 _A_o_o_RE_s_s_A_1s_ _A_s_____ TPXAV...

Page 21: ...8 ns TCLCL 25 ns TPLPH PS N Pulse Width 215 ns 3TCLCL 35 ns TPLIV PSEN To Valid Instr In 125 ns 3TCLCL 125 ns TPXIX Input Instr Hold After PSEN 0 ns 0 ns TPXIZ1 Input Instr float After PSEN 63 ns TCLC...

Page 22: ...ress ALE provides the Address Latch Enable output which is to be used to latch a low order address to external memory PSEN Program Store Enable Output is a control signal which enables external memory...

Page 23: ...RIVER AfJ 80 A7 DIR 87 EN Fig 8 3 page switching DAlS IC13 LS32 i _ LAl5 DA14 lC47 LS04 IC24 LS157 A lY A 2Y A 4A 3Y 4Y _ B 2B s IC25 LS157 lA lY 4A 18 I IC20 lA 4A 18 4B 4Y s LS15 y I 4Y s D4 D IC31...

Page 24: ...LLWL ALE To WR or RO 200 30b ns 3TCLCL 50 3TCLCL 50 TAVWL Aoo ess To WR 01 RO 203 ns TCLCL 130 ns TWHLM WR 01 RO H gh To ALE M gn 3 123 ns TCLCL O TCLCL 0 ns TOVWX Data Vlh0 To WR T11n1 1ton 0 ns 0 ns...

Page 25: ...4 cs rl I P25 los0 DB7 00 I P07 BUS 07 IC35 LS373 IC36 14569 IC29 LS373 AFSK LATCH DRIVER ADDRESS 10 00 DPAl LATCH 00 I I 10 080 87 03 DPA4 17 04 DPBl I I I I 17 07 07 DPB4 ENA m1 WR DAl 3 IC14 LS02 F...

Page 26: ...e is set to L level and the rest to H level In this case the reading in of PC0 PC3 enables CPU to see the state of the line If any one key is pressed then either of PC0 PC3 which is on the same line w...

Page 27: ...46 is controlled by IC40 8255 The function table of IC46 5832 is as shown in Fig 10 1 When the RESET button is pressed each port of IC40 8255 becomes in high impedance state and TR7 DTA114 becomes OFF...

Page 28: ...D1 0 9 D2 leap year by 11 H11 29 days for 0 0 0 1 D10 0 0 3 February D2 28 days for February by 11 L11 1 0 0 1 MOl 0 9 0 1 0 1 MOlO 0 1 1 1 0 1 Yl 0 9 0 0 1 1 YlO 0 9 NOTES When a leap year is set the...

Page 29: ...utput buffer of the printer port is provided with power through a noise filter to keep the spurious radiation at low rate As PA0 PA7 of IC4O 8255 are used to control the real time clock IC46 5832 PBS...

Page 30: ...N4 is defective of contact 2 No printing of characters though the electric characteristic and the timing of the printer interface is compatible l Check if the BUSY signal and the SELECT signal are cor...

Page 31: ...by TR9 2SC536 at 125 KHz The PTT keying circuit works only when plus voltage is added for the circuit uses emitter grounded NPN transistor 2SC1384 of TR17 PROBLEMS 1 A certain cercuit among REMOTE CW...

Page 32: ...cter Font 76543210 0 1 2 3 4 5 6 J 7 ________ ___ 8 t i 1 9 1 II 10 __ _ _ ___ _ _ _ J _ Jll Vertical Synchronizing Frequency 50 Hz Fig 13 1 76543210 Vertical Synchronizing Frequency 60 Hz In case the...

Page 33: ...l 4 4 1 t 1 51 1 1 6 l 4 4 4 4 f l t 7 a 1 l 8 l 4 1 1 1 91 4 4 t 1 4 4 f l I 101 4 4 ___ _4 j f 4 l I 1111 _1 1 1 12 1 1 1 131 4 4 I 14 _____ _ 15 I 6 l 4 lf t 171 4 f 4 4 4 18 i 19 l 20 I 21 4 4 l...

Page 34: ...4Y I M 3 1B s J 4B ICll LS73 MAS I lJ lQ lCK fQ lK IC18 LS93 CN A QA B QB CN2 R l CN3 1 QC r R 02 QD rtfi ICl0 LAlS IC12 A LS30 d IC4 LS393t ti A lQAU lQB _ S It 25 lQC i i Wiss switching lQD l Plo c...

Page 35: ...ISPLAY BLANK H sync l 5625Hz 60 0 1 2 3 4 5 6 7 8 9 10 ll 1213 1415 16 l 1819 20 21 22 23 2425 0 l 2 3 4 5 6 7 8 9 10 ll 1213 14 15 16 l71819 2021 22 2324 25 0 l 2 3 4 5 6 7 8 9 10ll 12 1314 l302 083H...

Page 36: ...INTENTIONALLY LEFT BLANK...

Page 37: ...IC9 LSll and ICl0 LS04 to produce the horizontal synchronous signal H for the composite signal IC3 LS74 is a flip flop for generating the horizontal display duration signal and the display is activate...

Page 38: ...through the driver IC2 7406 VR17 s a variable resistor for contrast adjustment VR18 s a var able resistor for brightness adjustment An 12VDC power is supplied from CNS to drive the bu lt in monitor Ha...

Page 39: ...IC25 LS157 IC31 6116LP 4 IC32 2716 and IC41 LS166 NO Check the synchronizing signal generating circuit 4 Two data or more are displayed horizontally when one data is to be displayed on the screen Chec...

Page 40: ...IC 6 7 8 LS157 IC 9 LS73 IC 10 lS74 IC 11 8255 PPI IC 13 6116LP 4 OllS RAM IC 14 15 1593 Tl L IC 16 5832 RF AL Tl 1E CLOCK IC 17 14569 OllS LOGIC IC 18 15166 TTL IC 19 2716 EPRON CHARACTER GENERATOR I...

Page 41: ...OS LOGIC IC 53 7805 5V VOLTAGE REGULATOR IC 54 7812 12V VOLTAGE REGULATOR IC 55 14021 010S LOGIC IC 56 14094 IC 57 14068 IC 58 14007 IC 59 PC837 OPTOISOLATOR IC 60 BA546 AUDIO AMP DIODE CODE NO _____N...

Page 42: ...DIODE ALLEY D52 55 DAP601 IBANSISTQR CODE NO NAME DFSCRIPTION TR 1 3 5 9 10 16 2SC536F TRANSISTOR TR 4 Al015Y TR 7 DTA114 TR 13 17 2SC1384 TR 14 15 2SC2271E COIL CODE NO NAME DESCRIPTION L 1 6 7 12 13...

Page 43: ...22K 22K VR 11 IOK IOK VR 12 4 7k 4 7K VR 15 123P N 10KB VARIABLE RESISTOR 10KB VR 16 179N 10KA lOKA VR 17 l23P N 5008 500 8 VR 18 123P N 100KB 100KB CONNECTOR tQ OE NO NAME DESCRIPTI_ON CN l 5281 4A W...

Page 44: ...OWER s lJRCE TRANSFORMER Xl X 2 J 1 9 J 10 11 S I S3 S 4 S 5 S 6 9 8NHZ 32 768KHZ SQ 3099 SQ 3063 SDU JS5040 SUZAI U SUZAI L SPQ051D CRYSTAL PIN JACK POWER SWITCH VOLTAGE SWITCH 10 CF AR PUSH SWITCK 5...

Page 45: ......

Page 46: ...5 V IC 53 54 7 IC 22 Tr 3 4 5 RESET CONTROL 1 I C PU IC 23 BUS ADDRESS _ ADDRESS t LATCH IC 29 OPT REMOTE 1 u FSK ISOLATOR o CW IC 48 _______ DRIVER IC16 Tr 17 PTT CONTROL ADDRESS __ SELECTOR R A M CG...

Page 47: ...I DDC5NDG I DATA DISPLAY MONITOR CHASSIS TECHNICAL MANUAL DO NOT SCALE THIS DRAWING I A1 f TECHNICAL MANUAL f r t...

Page 48: ...al Circuit 15 6 3 Horizontal Circuit 15 6 4 High Level Stages 15 7 TROUBLESHOOTING 16 8 HOWTOREPAIR 17 8 1 No Raster 1 17 8 2 No Raster 2 18 8 3 Only One Horizontal Raster Line 19 8 4 Vertical Synchro...

Page 49: ...re hazard and others These characteristics are often passed unnoticed by a visual inspection and the protection afforded by them cannot necessarily be obtained by using replacement components rated fo...

Page 50: ...and vertical drive as separate TTL level signals The 100 solid state sillicon circuitry provides cool operation and high reliability Features 5 5 inch CRT Direct etched non glare faceplate option 650...

Page 51: ...y V R type mounted on PCB Rotary V R type mounted on PCB Rotary V R type mounted on Main PCB Optionall External user supply Raster centering Raster centering rings magnet type mounted on Deflection Yo...

Page 52: ...C Humidity Operation 10 to 80 non condensing Storage 10 to 80 non condensing Altitude Up to 10 000 ft 3 050 m X ray radiation Less than 0 5 mR H MTBF 30 000 hours without CRT Factory adjusted rate Pow...

Page 53: ...N 4 N 5 I t OSMDK REVISION 11 1 C I I C I 5 SCALE C e 11 1 Ii t N I 0 M 0 N 122 76 Unit mm co r N H N M DO NOT SCALE THIS DRAWING F1LE cooe...

Page 54: ...izontal Drive 5 NC 4 BRIGHTNESS B 100K ohmt 3 OARK 2 BRIGHT ______J Ground 5x7 doll DOT CLOCK SOH s 8 2 bOH B 10 doll CHARACTER CLOCK 8 MHz 1 MHz SYNC VIDEO 40 charl I Total Character Diaplay Characte...

Page 55: ...E 65 57 MIN TO 60 24 MAX 3 VERTICAL RETRACE IS INITIATED AT t5WITHOUT DELAY 4 VsPERIOO OF ONE FIELD 16 4ms MIN TO 20 4ms MAX TABLE 1 t3 VS t1 TIMING FOR CENTERED HORIZONTAL VIDEO AS FUNCTION OF H BLAN...

Page 56: ......

Page 57: ...5770 COMB TAP SCREW MBW 1 4 2761 51670 DEFLECTION YOKE 1 111 2 3441 17070 CRT MTG BR KT MOK 102 3 2203 00802 SB RT 2 3 0x8 Z1 5 111 2 3121 19870 CHASSIS FRAME MOK 111 2 6231 16570 GROUNDING TIP MOK 00...

Page 58: ...LS on PCB Vertical Linearity i Horizontal Video Centering Height IVertical Hold Sub brightness Focus Horizontal Linearity r ____ _ Contrast op J Fig 3 DO NOT SCALE THIS DRAWING INST RACTIONS DOCSNI x...

Page 59: ...rd especially the vertical and horizontal circuit as the external flux field or noise may cause mal effect on displayed picture stability 3 3 Power Input The DC input power is applied through Pin 7 8...

Page 60: ...ghtness control 3 External Brightness and Contrast Control Connection If necessary an external brightness conttot 8 100K OHM and external contrast control B 500 OHMI can be used under the following me...

Page 61: ...e CRT discharge the HIGH VOLTAGE throughly with the following procedures step 1 to 5 Refer to Fig 4 WARNING Great care must be taken because the High Voltage will be charged for approximately 30 hours...

Page 62: ...e the displayed picture is center of the background raster in horizontal leave even space at left and right between each side of the back ground 3 After Horizontal Video Center Ad1ustment t Brightness...

Page 63: ...at provides a positive feedback Specifically when 0601 is turned on by the drive pulse it discharges C603 at a rate determined by the setting of VR601 When C603 is discharged to 2 75 volts 0602 turns...

Page 64: ...ufficient horizontal width Check horizontal circuits Unusual vertical size Readjust VR502 and VRS0J or check 0701 and vertical circuit Dark screen Readjust VR651 or check CRT s associated circuitry Ve...

Page 65: ...YES NO i Is power output of horizontal drive Check horizontal phase shift circuit 0601 circuit applied to the Base of 0604 WF 9 I YES NO Check horizontal output circuit 0604 WF 11 Check Jrizontal dri...

Page 66: ...riztntal applied to CiT s Pin 6 I circuit transformer output circuit YES 10 Is normal cafhode voltage Check Eg2 circuit applied to CjT s Pin 2 7 YES NO Checl CRT Chel video circuit Note Check high vol...

Page 67: ...and defective I connectors NO Is 8 appliet to Pin 2 and Pin 10 of IC NO t Check B line I YES Check IC at its associated circuits WF 4 5 and 6 WF 4 0 5Vp p V N j IC501 JIPCl031H2 7 WAVEFORM SHAPING rm...

Page 68: ...synchronous pulses applied to WF 3 7 NO Check defective I YES Check VR501 VERT OSC ORI VE a OUTPUT WF 3 3Vp p V m 0701 250612 11 8V Alt II I IF a nnectors of deflection yoke WF 4 WF 6 R504 I SK HOW TO...

Page 69: ...I I YES NO Check VR502 and VR503 Check IC and its associated circuits WF 4 5 and 6 0701 2S0612 VAIi VERT OSC DRIVE a OUTPUT IC501 J1PC1031H2 VIDE IV LINi VR5O3 1 5K 1tl1J VR5O2 IV HEIGHTI 8 50K C508 I...

Page 70: ...maximum position No Raster appears I YES Are input siJnals completely supplied NO Check the signal source I YES Check videot cuit WF 1 VIDEO AMP 11111 111I ilwnl l PICTURE TUBE _o tl fJ t Alf R901 680...

Page 71: ...athode of CRT NO Check R902 I YES Is normal video signal injected NO check EXT Control VR to Pin 8 of edge connector I YES Adjust VR6 2 for optimum focus DO NOT SCALE THIS DRAWING 111f rom HOW TO REPA...

Page 72: ...CRT socket cathode green lead together with other leads SCAI F Make sealed wires from WIRE BAND TCM encroach on area encircled by dotted line Make sealed wires from WI RE BAND THJ DO NOT SCALE THIS DR...

Page 73: ...the high voltage lead once and shape as shown in illustration Insert the high voltage cap in the direction shown in the illustration Make a loop in the cathode green lead as shown D NOT SCALE THIS ORA...

Page 74: ...hen replacing electrolytic condenser Single ended type apply CEMEDINE 550 for 15mm or more to the condenser height above the base plate Electrolytic Condenser ___i 17 Single ended typeJ Apply CEMEDINE...

Page 75: ...u 1 silicon glass tube Use a silicon glass tube to cover the composition resistor R902 PCB Composition Resistor R902 00 NOT SCALE THIS DRAWING l r if C JUt CAUTION TO OBSERVE OURINGSET UP I nnc5NDG 2...

Page 76: ...__ WF 6 R509 C508 CI0RIOJJ R506 RSJ4 7K C503 7 1 r 1 r Hf eC25T J603 WF 8 C602 Cl6R 10 1 R604 RSJ6 8K I g 0 0022 1 IJJ HOR OUTPUT C509 CSOF 0 082JJ T601 42731 05970 WF 7 R611 Rl 2C 6 8 PHASE SHIFT 060...

Page 77: ...DO NOT SCALE THIS DRAWING v r 1 q f r tc cunt CIRCUIT BOARD DIAGRAM t H 4W N t Mf tllt I PAGf e f PAf fS DDCSNDG 29 32 EVISION...

Page 78: ...CCESSORIES LABELS 111 6 4551 16970 1116476136170 11164761 35971 111 6 4761 35971 111 6 4761 35971 1116479112154 1116479112154 1116479113376 1116479113376 SCAEW CH ASSIS 102 3 2203 00601 102 3 2203 008...

Page 79: ...0068M sov 1 C602 C1CRE 477A ELECT 470M 16V 1 C603 C1HFRK222A M LAR 0 0022M sov 1 C605 C2GORK223A POLYPR 0 022M 400V 1 C606 C2JORK682A POLYPR 0 0068M 630V 1 C607 C1HAEM009T ELECT 4 7M sov 1 C608 C1ERE...

Page 80: ...K 1 R904 R2HCPK333A SOLID 33K 1 2W K 1 R905 R2HCPK223A SOLID 22K 1 2W K 1 TUBES SEMICONDUCTORS 0601 4 2021 21070 SI DIODE S442H 1 0602 4 2021 21070 SI DIODE DS442H 1 0603 4 2021 21070 SI DIODE DS442H...

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