for 13803K/04K
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1. x TP1 These voltages were measured J1 DC O SW1A when SW1 is at GND position vi Cov SEN2 AV x BNC TP2 U2C 0 C1 AC 85 No C2 220pF SENT AV Xl i SW3A_ TL084 SO _ r U2B i Olu GNDg R1 100K Lom io a VO pa Zia So 10 2 l 8 d c3 3pF 0 1V i A 300 X5 AG T g SSF 4 a l R2 1 8M 1 U ia TE os f R7 i dil l R3 180 H C4 200K 1 Me AV Ny Se A 30pF N R8 lt 7 aen 120 U2A C5 1pF 5x R11 TL084 SO AV DaN R7 R4 2M1 R20 a VSENSEL1 TP7 C6 BS N E E E E R21 a 30pF 20K 1 A Psd C7 yo AVt SW1B 120pF NZ CPLSEL TP6 Test Signal Terminal U2D TESTSIG l T R26 1K J2 Power Supply Caution Power supply voltage can not be higher than 12V D2 1N4004 Vt TP20 EJ JYE Tech Ltd www jyetech com ENT ED TP27 TP28 TP29 TP30 x TP25 v wa eT 8550 D1 L1 1N5819 100uH ko C24 L2 C25 100uF 1mH 1 100uF K R38 1 5K VGEN R41 oz R40 470 gayi R4 R39 0 1u These voltages are power voltage dependent Th 10K r values shown were measured at 9 3V power voltage TLO84 SO 100K l U1 PAO PA1 PA2 PAS PA4 PA5 PA6 PA7 PA8 PAQ PA10 6 PA11 PA12 TP10 PA13 PA14 PA15 PD1 OSC_ OUT PDO OSC_IN PBO PB1 PB2 PB3 P2. RESET before using Test Mode PIN 1 Test Mode is used to find out possible opens for all port pins and shorts for pins PBO 15 and PC13 15 When entered it first checks PB and PC pins with special patterns to find out possible shorts If found LED will be fast blinking Otherwise it generate 3 3V and OV alternatively at each port pins PA PB PC and PD in cycle of about 4 seconds These signals can be used to check for opens How to use 1 Hold down SW4 and press RESET to enter Test Mode 2 If you see LED fast blinking that means there are shorts on PB or PC pins You need to find out the shorts first 3 If you see LED slowly blinking use a volt meter to check each pin related connections that are suspected open When you don t see voltage change at a spot which is supposed being connected to a port pin there may be open between the spot and the port pin Tech Support www jyetech com forum The voltages on your board could be different But they should be close to the values shown BV GD Gav G Ate References l 7 gt C0 19V C6 43V 9 9 39 Input Voltage i 53050158 AE e DIGITAL OSCILLOSCOPE AV AV 5 5V oV que a i 6 a 01 1N5819 a1 Aa N Di i gt egm R25 u2 TL084 gt EAS he R35 eI SEL X5 X2 X1 rra rea 5 2 ART 2 S p Em vi v2 vs m Sool E 5 j 4 iricceD S RESET DGND PN fi09 13600 00C oe 7 These voltages are input voltage dependent The value
3. board for possible opens or shorts use Test Mode Check LCD board 0 Set CPL switch to GND and measure V1 and V2 Visit forum for detailed troubleshooting guide Are they correct No Check U2B U2C and related parts around these two amplifiers Yes Check R12 and C8 eg JYE Tech Ltd www jyetech com Plug LCD board into the female headers J3 J7 and J8 on the main board NOTE 2 LED will be blinking constantly if MCU No Display gt Check 3 3V voltage gt Check Y1 C12 C13 gt Check LED installation Test Mode What it is and how it works Press SW8 Does LED blink gt Check J1 soldering on LCD 22 LCD Board Short JP3 with solder QO J1 C J2 J3 their functions Note Install to the side opposite to LCD panel The assembly should look like 1 after you have finished all part Connect power supply again You should see LCD lights up and oscilloscope panel displayed Press various buttons and move switches to verify 2 X 20 pin 1 X2 pin Q Attach probe clips to J1 Touch the red clip with your finger Do you see signal from your finger Trigger LED blinking twice indicates booting up is good NOTE 1 The voltages in the photo are for reference only U1 can not detect valid LCD controller Check LCD pin header soldering NOTE 3 Make sure U1 and LED working you see LED blinks twice at pressing
4. B4 PB5 PB6 PBZ PB8 PB9 PB10 PB11 PB12 PB13 PB14 PB15 VDD 1 VDD 2 VDD 3 3 3V LCD nCS on D nWR C16 G17 PC13 TEMPER RTC VSS 1 PC14 0SC32 IN VSS 2 PC15 0SC32 OUT VSS 3 STM32F103Cx 0 1u 0 1u D3 LED R28 470 iq 143 3V LoD RS 1 3 3V LCD nRD LCD nRESET LCD HEADER Part values 3 3V C18 0 1u used could be different to the values shown Please refer to part list Parts in dash line boxes are SMD devices JYE Tech Ltd WWW NETECH COM jyetek gmail com Page 4
5. Sa s a set level i e trigger level along a specified direction os Analog bandwidth 0 200KHz i e trigger slope rising or falling Oscilloscope uses z i triggers as reference points in time for stable waveform Sensitivity range 10mV div 5V div display and measurements Max input voltage 50Vpk 1X probe Input impedance 1M ohm 20pF Auto Mode 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 a 120mA refresh when there are triggers If no triggers happen Dimension 117x76x 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 Sg JYT Tech Ltd Normal and single modes are useful for capturing sparse or single waveform Tel 86 0773 2113856 www jyetech com Page 3
6. Soldering Hints C Put leads through mounting holes from the side with part outline Ensue component evenly touch PCB 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 Rev 04 U ser M ATL UAL Applicable models 13803K 13804K Before you start Tools you need D Iron 20W 4 Screw driver Q Solder wire 5 Flush cutter G Multimeter Tweezers C Check part values amp quantities against part list 2 Always meter resistor values before soldering G Understand all part polarities and orientations Important SUE Assembly Main Board and LCD board follow the order as numbered Testal all SMD parts before proceeding to Step1l if you purchased kit 13804K 9 Pin header for power O J4 USB mini B Face the opening K outward Note l This connector is z ee 2 Pin Ll R7 R36 180 optional R8 R12 R13 1202 LIR1 R14 R16 100K2 Fko R15 R26 1KO C R2 18M9 ORIO Ae LI R3 200KS oy Ry 1806 z A pN O Q1 8550 L R4 2M C R38 1 5KQ p o O sw4 sws 6X6X5mm O Q2 9014 f 7 amp SW6 SW7 CI R5 20K Q C R28 R40 4709 N Attention SW8 Pack mil LI R6 C R37 R39 10K2 ackages are similar Do not mix up 2 HF Chokes Ova 79L05 L P z O us 78L05 z 4 gt gt O L1 L3 L4 n E C14 C15 2 TR A
7. high frequency 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 X1while keep all other settings unchanged Adjust C6 so that sharp rightangle waveform is displayed Ruming E J Ruming p osu ac O zms muto fF O V AC AUTO F A Not enough B Too much C Good Turn On Off Readouts Press SEL so that timebase is highlighted Hold down OK button for about 2 seconds This will turn on off measurement readouts Waveform Save Recall Press SEL amp simultaneously Save currently displayed waveform to non volatile memory Press SEL amp simultaneously Recall saved waveform Triggers and Their Modes l B Specifications Triggers are events that indicate signal voltage acrossing P ape Max realtime sample rate 1M
8. ill be highlighted 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 OV 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 EJ 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
9. s shown were measured when input voltage was 9 39V Place the negative pen of volt meter These voltages are measured when CPL switch SW1 here to do voltage measurements is set to GND position Wry cli i i 3 3V DIO CLK GND i o Page 2 How to Use Display and Controls Trigger Level Readout Connectors q a for Power Supply Horizontal y Oscilloscope Position Mode Connector for Probe gt i 138 yaw a OK A i JEO TEON ee Deri oa HOLDERUN 6c Q i anga Mgaa i C Selection CPL or Couple Parameter Selection Adjustment SEN1 SEL Sensitivity Parameter Selection 1 ES sese suer ey casks Ge A eer Selection _ 15700 204 SEN2 ao ee Trigger Sensitivity kag oa caa WEL v AE Level Selection 2 pine ee 9 M 2 s Ea CREEN ee Indicator X mae al aag an Reset Trigger Trigged Button Slope Indicator Timebase Sensitivity s div Vertical V div i 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 5 0Vpk 100Vpp with the clip probe Operations Press on SEL button Select parameter to be adjusted The selected parameter w
10. ttention 2 C16 C17 Packages are similar C18 C20 Do not mix up C23 O c7 c8 120pF O C12 C13 22pF Cathode 1IN5819 1N4004 or 1N4007 5 30pF Solder positive pole the longer lead to gt h 1mH 0 5A the square pad BJ JYE Tech Ltd www jyetech com Solder positive pole the longer lead to 14 Electrolytic capacitors O C19 C21 100u F 16V C22 C24 C25 C26 1 X3 pin J6 1 X 4pin Note These pin headers are optional LI J7 J8 1X2pin LI 33 2 X20 pin SW1 SW2 2P3T SW3 O J1 BNC Note The thicker pins need to heat up longer to get good soldering result Page 1 20 Test signal ring 1 Make a small ring witha lead cut off 2 Solder the ring to the two holes of J2 as shown in the photo Apply 9V power to J10 or J9 Q Check voltage at TP22 It should be around 3 3V If voltage at TP22 is good disconnect power Short JP4 with solder permanently O Troubleshooting LCD Dark No backlight Is voltage at V good Yes Is R36 value correct Check power suppl Fix R and soldered good Yes Do you get about 3V No between J1 pin 16 amp Check R36 and power again N 18 on LCD board Are the values of AV and Yes AV correct Short JP4 if it has not been done See Step 2 above gt Check J3 soldering for possible opens or shorts
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