User Manual Rev. 01
Contents
1. ranpe 10mV div 5V div display and measurements Max input voltage 50Vpk 1X probe Input impedance 1M ohm 20pF Auto Mode a p Resolution 12 bits In auto mode oscilloscope will perform display refresh no Record length 1024 points matter triggers happen or not When triggers are detected waveform display will be displayed with reference to trigger points Otherwise display waveform at ramdom reference points 500s Div 10us Div Auto Normal and Single Timebase range Trigger modes Trigger position range 50 Normal Mode Power supply 9V DC 8 12V In normal mode oscilloscope will only perform display eee 120mA refresh when there are triggers If no triggers happen Dimension 117x 76x 15mm waveform display will stay unchanged Weight 70 gram without probe Single Mode Single mode is the same as normal mode except that oscilloscope will enter HOLD state after a trigger has been detected and waveform display has been updated Tech Support www jyetech com forum i JYT Tech Ltd Normal and single modes are useful for capturing sparse or single waveform Tel 86 0773 2113856 Www jyetech com Page 3 TP1 These voltages wer e measured J1 DC O SW1A when SW1 is at GND position vi Cov SEN2 AV are BNC TP2 U2C C1 AC No C2 220pF NV X14 SW3A TLO842. BJ JYE Tech Ltd www jyetech com 14 Electrolytic capacitors Solder positive pole the longer lead to the square pad LI C19 C21 100nF 16V C22 C24 C25 C26 LI 37 38 LI 33 2 X20 pin 1X2 pin O SW1 SW2 2P3T SW3 Page 1 20 Test signal ring 22 LCD Board 1 Make a small ring with a ae ayo m Note Install to the side lead cut off TEANNEN Short JP3 with solder opposite to LCD panel 2 Solder the ring to the two M holes of J2 as shown in a O Ji 2 X 20 pin the photo 3 79 05 _ O J2 53 1 X2 pin NOTE You need a9V DC power supply at least 200mA capacity The assembly should look like this to run the scope This power supply is not included in the kit after you have finished all parts B Attach LCD board C Verify Apply 9V power to J10 or J9 Plug LCD board into the female headers J3 J7 and J8 Q Connect power supply again You should see LCD Q Attach probe clips to J1 Check voltage at TP22 It should be around 3 3V on the main board lights up and oscilloscope panel displayed QG If voltage at TP22 is good disconnect power Short JP4 Press various buttons and move switches to verify with solder permanently O their MICHONS Q Touch the red clip with your finger Do you see signal from your finger RIA g oy 3 n v Trigger LED blinking twice indicates booting up is good T
3. SO i SEN1 U2B ra 0 1u GND R1 100K 10mV O TL084 S0 R6 X2 a m 140 E SW2A o C3 3pF 0 1V oO 6 300 XS 4o lg rs R2 1 8M 1 iv 4 7 lg on O R7 I YO R3 180 k C4 200K 1 n a s 30pF DES R8 s Z ie 120 UA C5 1pF ie R11 TLO84 SO AV I 7 1 5K R4 2M1 R20 aa VSENSEL1 TP7 C6 RS PIa gan Ree 7 R21 7 30pF 20K 1 a roi f C7 AV SW1B 1200F NZ R17 LpEo K TAR oso CPLSEL_ TP6 U2D Test Signal Terminal TESTSIG T R26 1K J2 Power Supply Caution Power supply voltage can not be higher than 12V D2 TP20 1N4004 Vt BJ JYE Tech Ltd www jyetech com TP27 TP28 TP29 TP30 8550 oe D1 a L1 1N5819 100uH C24 L2 1 5K 1mH 1A iF GDA CD C25 100uF an R39 0 1u C23 R40 470 10K _NGEN E TL084 S0O 100K 79L05 TO92 Th These voltages are power volt age dependent values shown were measured at 9 3V power voltage TP31 re U1 PAO PD1 OSC_OUT PA1 PA2 H PA3 PA4 PA5 PA6 PA7 PA8 ETE lt PA9 I PA10 C a PA11 Sal TP10 PA13 PA14 PA15 PDO OSC_IN PBO PB1 PB2 PB3 PB4 PBS PB6 PB7 PB8 PB9 PB10 Oo 2 E PB11 PB12 PB13 PB14 PB15 VDD_1 VDD_2 VDD_3 3 3V N CO O EB C16 C17 C18 PC13 TEMPER RTC VSS_1 PC14 O0SC32_IN
4. Soldering Hints C Put leads through mounting holes from the side with part outline Ensue component evenly touch PCB 2 Solder leads at the other side Solder should fully fill and cover soldering pads Avoid bridges between neighbering pads Cut unused leads flush with cutter DSO 138 Oscilloscope DIY Kit User Manual rs Before you start Tools you need Q Iron 20W Screw driver Q Solder wire Flush cutter Q Multimeter Tweezers C Check part values amp quantities against part list 2 Always meter resistor values before soldering QG Understand all part polarities and orientations These parts are optional and not required for the normal oscilloscope function Step Assembly Main Board and LCD board follow the order as numbered 9 Pin header for power Face the opening outward Always meter resistor cual values before soldering USB mini 2 Pin L R7 R36 1802 C R8 R12 R13 1202 LI R9 R15 R26 1KQ O R10 3K Q C R11 R38 1 5KQ L sw4 Sws 6X6X 5mm C R28 R40 470Q Uu 1 A ae C R6 C R37 R39 10K 2 L R1 R14 R16 100K Q C R2 1 8MQ C R3 200K Q C R4 2MQ Li rs 20K Q 2 HF Chokes O cC1 C9 C10 C11 C14 C15 C16 C17 C18 C20 C33 Ll c7 cs O L1 L3 L4 O 12 ci3 Cathode 1IN5819 IN4004 or 1N4007 5 30pF Solder positive pole the longer lead to the square pad 1mH 0 5A
5. VSS_2 PC15 OSC32_OUT VSS_3 STM32F103Cx a4 0 1u 0 1u D3 LED R28 470 Sd 3 3V LCD RS 1 3 3V LCD _nRD LED A LED K2 D K4 DB1 DB3 DB5 DB7 LCD_nRESET 3 3V LCD HEADER Notes 1 Part values used could be different to the values shown Plea se refer to part list 2 Parts in dash line boxes are SMD devices JYE Tech Ltd WWW JYETECH COM jyetek gmail com Page 4
6. lighted Press on or button Adjust the parameter selected by SEL button Press on OK button Freeze waveform refresh entering HOLD state Press on it again will de freeze Change CPL switch Set couple to DC AC or GND When GND is selected the scope input is isolated from input signal and connected to ground 0V input Change SEN1 or SEN2 switch Adjust sensitivity The product of SEN1 and SEN2 settings makes the actual sensitivity which is displayed at the lower left corner of the panel Press on Reset button Performa system reset and re boots the oscillscope 0V Line Alignment Sometimes you may find the OV line the trace corresponding to 0V input voltage does not match with the VPOS indicator at the screen left border This can easily be fixed by performing the 0V line alignment function First set the couple switch CPL to GND position Then press on SEL button to make VPOS indicator highlighed and hold down OK button for about 2 seconds You will set the trace aligned to VPOS indicator when you release OK button You may see some residue mismatch remains at the highest sensitivity settings This is normal BJ JYE Tech Ltd www jyetech com Probe Calibration Connect red clip to test signal output Leave black clip un connected Because there is always some capacitance between scope input and ground probe needs to be calibrated to achieve better measurement results for high freque
7. ncy signals This can be done with the help of the built in test signal To do this please follow the steps below 1 Connect the red clip to the test signal terminal and leave the black clip un connected see photo at right 2 Set SEN1 switch to 0 1V and SEN2 switch to X5 Set CPL switch to AC or DC 3 Adjust timebase to 0 2ms You should see waveform similar to that shown in photos below If traces are not stable adjust trigger level the pink triangle on right screen border so as you get a stable display 4 Turn C4 capacitor trimmer with a small screw driver so that the waveform displays sharp rightangle photo C 5 Set SEN1 switch to 1 V and SEN2 switch to X1 while keep all other settings unchanged Adjust C6 so that sharp rightangle waveform is displayed Ruming Ruming 9 W AC 0 ens AUTO osu Ac ezm AUTO f B Too much A Not enough Hints The LED at bottom right corner labelled TRIGGED is the trigger indicator It blinks when triggers are detected Triggers and Their Modes a Specifications Triggers are events that indicate signal voltage acrossing p j i on i Max realtime sample rate 1MSa s a Set level i e trigger level along a specified direction a Analog bandwidth 0 200KHz i e trigger slope rising or falling Oscilloscope uses ioe triggers as reference points in time for stable waveform oy
8. red when input voltage was 9 39V Tech Support WWW y etech com fo rum Cheek R12 and C8 Place the negative pen of volt meter F These voltages are measured when CPL switch SW1 here to do voltage measurements is set to GND position Are the values of AV and AV correct Check U2B U2C and related parts around No BEJ JYE Tech Ltd www jyetech com Page 2 Howto Use Display and Controls Trigger Level Readout Connectors q a for Power Supply Horizontal 3 Oscilloscope Position Mode Connector for Probe gt l D05018 n saes A OK e i n A nN N N 33 a at ee EA HOLD RUN a Top Daa r Selection EE or Couple Parameter Selection Adjustment SEN1 SEL Sensitivity Parameter Selection er cass ee Ae Selection SEN2 Trigger Sensitivity Level Selection 2 Indicator Reset Trigger Trigged Button Slope Indicator Timebase Sensitivity s div Vertical V div Trigger Position Couple Mode Indicator Connections Power Supply Connect DC power supply to J9 or J10 The power supply voltage must be in the range of 8 12V Attention 1 Power supply voltage must not exceed 12V Otherwise U5 will get hot 2 Allowed maximum signal input voltage Probe Connect probe to J1 is 50Vpk 100Vpp with the clip probe Operations Press on SEL button Select parameter to be adjusted The selected parameter will be high
9. roubleshooting NOTE The voltages in the photo are for reference only C5 0V 4 99V 20 C5 02V Voltage LCD Dark The voltages on your board could be different Ja References No backlight No Display But they should be close to the values shown T 19 ABV 039V Anput TT Is voltage at V NO good Yes Is R36 value correct Check power suppl and soldered good eae Yes Do you get about 3V No between J1 pin 16 amp Check R36 and 18 on LCD board power again Yes Check LCD board ANO M Y fel aa a gt Check 3 3V voltage Press SW8 Does LED blink gt Check Y1 C12 C13 gt Check LED installation Short JP4 if it has not been J amp Fin 7 x mor done See Step 2 above C8 11V GS J i Eg i 5 mi K se T gt amp a af 4 ry A a a K gt Check J3 soldering for possible opens or shorts gt Check J1 soldering on LCD board for possible opens No Trace or shorts No AT P 3 ne 5 m E E Ma RS a ee ee ae 3 SEN i Q Ae co el aA 8 Bile SEL X5 X2 Xt Ee RZE Gt erm J3 oo Sega SHO 9s m Wi v2 v3 miv PEE mss 2 J i Wty ds ey JA A Ri DGND PN iD9 1360e 00C cH Bs Y i 39V DIO CEK GND RIGGED S RESET Yes Set CPL switch to GND and measure V1 and V2 Are they correct these two amplifiers 7 Yes These voltages are input voltage dependent The values shown were measu
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