JYE Tech 13803K - User Manual

Iron (20W)
1
Solder wire
Multimeter
Screw driver
User Manual
Rev. 04
DSO 138 Oscilloscope DIY Kit
2
3
4
Flush cutter
5
Tools you need
Tweezers
6
Assembly Main Board and LCD board (follow the order as numbered)
Step 1
- www.jyetech.com -
JYE Tech Ltd.
1. Resistors
Always meter resistor
values before soldering
Note:
R1, R14, R16
100KΩ
R2
1.8MΩ
:
:
R3
200KΩ:
R4
2MΩ:
R5
20KΩ:
R6
300Ω:
R7, R36
180Ω
R8, R12, R13
120Ω
:
:
R9, R15, R26
1KΩ
:
R10
3KΩ
:
R38
1.5KΩ
:
R28, R40
470Ω
:
R37, R39
10KΩ
:
L1,L3,L4
100Hμ
2. HF-Chokes
:
D1
1N5819
3. Diodes
:
D2
1N4004
:
(or 1N4007)
Y1
8MHz
4. Crystal
:
J4 USB mini -B
5. USB Socket *
:
6 X 6 X 5mm
6. Tact Switches
:
SW4, SW5,
SW6, SW7,
SW8
7. Ceramic Capacitors
0.1F μ
:
330pF:
3pF:
C1, C9,
C10, C11,
C14, C15,
C16, C17,
C18, C20,
C23
1pF:
C7, C8
120pF
:
C12, C13
22pF
:
C2
C3
C5
D3
8. LED
:
φ3mm, green
Solder positive pole
(the longer lead) to
the square pad
J9
2 Pin
9. Pin header (for power)
:
Face the opening
outward
8550
10. Transistors
:
Q1
9014
:
Q2
Cathode
79L05
11. Regulators
:
U4
78L05
:
U5
C4, C6
5 - 30pF
12. Capacitor trimmers
:
L2
1mH/0.5A
13. Power inductor
:
14. Electrolytic capacitors
:
100μ /16VF
Solder positive pole
(the longer lead) to
the square pad
C19, C21,
C22, C24,
C25, C26
DC005
15. Power connector
:
J10
16. Pin-header (male) *
1 X 3 pin
:
J5
1 X 4 pin
:
J6
17. Pin-header (female)
:
1 X 2 pin
J7, J8
:
2 X 20 pin
J3
SW1, SW2,
SW3
2P3T
18. Slide switches
:
J1
BNC
19. BNC connector
:
Put leads through mounting holes from the side with
part outline. Ensue component evenly touch PCB.
1
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.
2
3
Soldering Hints
Check part values & quantities against part list
1
Always meter resistor values before soldering
Understand all part polarities and orientations
2
3
Before you start
Page 1
Packages are similar.
Do not mix up!
Attention!
Packages are similar.
Do not mix up!
Attention!
The thicker pins need
to heat up longer to get
good soldering result.
Note:
R11
150Ω
:
These pin-headers are
optional.
Note:
Applicable models: 13803K, 13804K
Install all SMD parts before proceeding
to Step1 if you purchased kit 13804K.
Important !!!
This connector is
optional.
Note:

Summary

Soldering Hints and Tools

Soldering Hints

Basic tips for soldering components evenly and cleanly on PCB pads.

Tools Required for Assembly

List of essential tools needed for the oscilloscope kit assembly.

Step 1: Component Installation

Resistors Installation Guide

Instructions for identifying and installing various resistor values.

HF-Chokes Installation

Guide for installing the HF-chokes (inductors).

Diodes Installation

Instructions for identifying and installing diodes, noting polarity.

Crystal Oscillator Installation

Guide for installing the 8MHz crystal oscillator.

USB Socket Installation

Instructions for installing the USB mini-B socket.

Tact Switches Installation

Guide for installing the 6x6x5mm tactile switches.

Ceramic Capacitors Installation

Instructions for installing various ceramic capacitors.

LED Installation

Guide for installing the LED, noting polarity and color.

Power Pin Header Installation

Instructions for installing the 2-pin header for power input.

Transistors Installation

Guide for identifying and installing transistors (8550, 9014).

Regulators Installation

Instructions for installing voltage regulators (79L05, 78L05).

Capacitor Trimmers Installation

Guide for installing capacitor trimmers (5-30pF).

Power Inductor Installation

Instructions for installing the power inductor (1mH).

Electrolytic Capacitors Installation

Guide for installing electrolytic capacitors, noting polarity.

Power Connector Installation

Instructions for installing the DC power connector.

Male Pin Header Installation

Guide for installing male pin headers (e.g., 1x3, 1x4 pins).

Female Pin Header Installation

Guide for installing female pin headers (e.g., 1x2, 2x20 pins).

Slide Switches Installation

Instructions for installing the 2P3T slide switches.

BNC Connector Installation

Guide for installing the BNC connector, noting thicker pins.

Step 2: Testing and Operation

Test Signal Ring and JP3

Instructions for creating a test signal ring and soldering JP3.

LCD Board Installation

Steps for connecting the LCD board to the main board.

Initial Voltage Checks

Procedure to check critical voltages after power connection.

LCD Board Verification

Steps to verify the LCD board functions after connection.

System Verification

Checking basic functions after assembly and initial power-up.

Basic Usage and Probe Attachment

Instructions on connecting probes and initial scope usage.

Troubleshooting Common Issues

Guidance for diagnosing and resolving display or power problems.

Test Mode Operation

Explanation and usage of the oscilloscope's diagnostic test mode.

Voltage Reference Points

Reference voltage values for testing specific points on the board.

Oscilloscope Usage and Features

Display and Control Interface

Overview of the oscilloscope's screen layout and physical controls.

Power and Probe Connections

Details on connecting the power supply and input probe.

Basic Operation Controls

Instructions for adjusting parameters like sensitivity and position.

OV Line Alignment Procedure

Steps to calibrate the zero-volt line on the display.

Probe Calibration Guide

Procedure to calibrate the probe for accurate high-frequency measurements.

Measurement Readout Control

How to enable or disable measurement readouts on the screen.

Waveform Saving and Recalling

Instructions for storing and retrieving captured waveforms.

Trigger Modes Explained

Detailed explanation of Auto, Normal, and Single trigger modes.

Technical Specifications

Key technical specifications of the DSO138 oscilloscope.

Overview

1. Function Description
2. Usage Features
3. Maintenance Features

This document provides a comprehensive guide for assembling, testing, and using the DSO 138 Oscilloscope DIY Kit. It's designed for hobbyists and electronics enthusiasts who want to build their own oscilloscope. The manual is structured to walk users through each step, from soldering individual components to performing initial tests and understanding the device's operational features.

Function Description

The DSO 138 Oscilloscope DIY Kit, once assembled, functions as a basic digital oscilloscope. Its primary purpose is to visualize electrical signals, allowing users to observe waveform shapes, measure voltage levels, and analyze signal frequencies. This device is particularly useful for educational purposes, basic circuit debugging, and hobby electronics projects where a full-featured, expensive oscilloscope might be overkill. It provides a visual representation of how voltage changes over time, which is fundamental for understanding and troubleshooting electronic circuits. The oscilloscope can display various types of signals, from simple DC voltages to more complex AC waveforms, and offers different trigger modes to stabilize the display of repetitive signals.

Usage Features

The usage of the DSO 138 oscilloscope involves several key features and controls:

• Power Supply: The device requires a 9V DC power supply, with a range of 8-12V, connected to either J9 or J10. It's crucial not to exceed 12V to prevent overheating of the U5 component.
• Probe Connection: The oscilloscope probe connects to J1. The manual emphasizes the importance of probe calibration for accurate high-frequency measurements.
• Display and Controls: The device features an LCD panel that displays the waveform and various parameters. Controls include:
  • Oscilloscope Mode: Selects the operating mode.
  • Horizontal Position: Adjusts the horizontal position of the waveform.
  • Trigger Level Readout: Shows the current trigger level.
  • Connectors for Power Supply: Points for power input.
  • [OK] (HOLD/RUN Selection): Freezes or unfreezes waveform refresh.
  • [+] or [-] (Parameter Adjustment): Adjusts the value of the currently selected parameter.
  • [SEL] (Parameter Selection): Selects which parameter to adjust.
  • Trigger Level Indicator: Shows the current trigger level on the display.
  • Reset Button: Performs a system reset and re-boots the oscilloscope.
  • Timebase (s/div): Adjusts the horizontal scale (time per division).
  • Trigger Slope Indicator: Indicates the trigger slope (rising or falling edge).
  • Couple (CPL) Switch: Selects DC, AC, or GND coupling. GND coupling isolates the input from the signal and connects it to ground, useful for setting the 0V reference.
  • Sensitivity (V/div) Switches ([SEN1] and [SEN2]): Adjusts the vertical scale (volts per division). The product of these settings determines the actual sensitivity displayed on the panel.
  • Vertical Position Indicator: Shows the vertical position of the waveform.
  • Trigger Mode: Selects the trigger mode (Auto, Normal, Single).
• Probe Calibration: A critical step for accurate measurements, especially at higher frequencies. This involves connecting the red probe clip to the test signal terminal (leaving the black clip unconnected) and adjusting trimmer capacitors C4 and C6 to achieve a sharp right-angle waveform display. This process ensures the oscilloscope accurately reflects the input signal without distortion caused by probe capacitance.
• Readout Control: Measurement readouts can be turned on or off by highlighting the timebase parameter with [SEL] and holding down [OK] for about 2 seconds.
• Waveform Save/Recall: The device allows saving the currently displayed waveform to non-volatile memory by pressing [SEL] and [+] simultaneously, and recalling saved waveforms by pressing [SEL] and [-] simultaneously.
• Trigger Modes:
  • Auto Mode: The oscilloscope continuously refreshes the display, regardless of whether a trigger event occurs. If triggers are detected, the waveform is displayed with reference to the trigger points. Otherwise, it displays the waveform at random reference points.
  • Normal Mode: The display only refreshes when triggers occur. If no triggers happen, the waveform display remains unchanged. This mode is useful for stable display of repetitive signals.
  • Single Mode: Similar to Normal mode, but the oscilloscope enters a HOLD state after a trigger has been detected and the waveform display has been updated. This mode is ideal for capturing sparse or single-shot waveforms.
• 0V Line Alignment: A feature to correct any mismatch between the 0V line trace and the VPOS indicator on the screen. This is done by setting the CPL switch to GND, highlighting the VPOS indicator with [SEL], and holding down [OK] for about 2 seconds.

Maintenance Features

The manual implicitly covers maintenance through its assembly and troubleshooting sections:

• Assembly Guidelines: The detailed step-by-step assembly instructions, including soldering hints (ensuring components touch the PCB, proper lead soldering, avoiding bridges, and cutting unused leads flush), are crucial for the initial integrity and long-term reliability of the device. Correct assembly is the first step in preventing future issues.
• Component Verification: The emphasis on metering resistor values before soldering and checking part values and quantities against the part list helps ensure that the correct components are used, preventing malfunctions from the start.
• Polarity and Orientation: Understanding and correctly installing components with specific polarities and orientations (like diodes, transistors, and electrolytic capacitors) is vital for the device's functionality and prevents damage.
• Troubleshooting Guide: A dedicated section helps users diagnose and resolve common issues:
  • LCD Dark (No backlight): Guides users to check voltage at V+, power supply, R36 value and soldering, and voltage between J1 pins on the LCD board.
  • No Display: Directs users to short JP4 if not already done, press SW8 to check LED blinking, and inspect J3 and J1 soldering on both the main and LCD boards for opens or shorts. It also suggests checking LCD pin-header soldering if the LED blinks constantly (indicating MCU cannot detect LCD controller).
  • No Trace: Advises checking AV+ and AV- values, setting the CPL switch to GND and measuring V1 and V2, and inspecting R12 and C8.
  • Test Mode: A built-in diagnostic tool to find possible opens and shorts on port pins (PB0-15 and PC13-15). Entering test mode (hold SW4, press RESET) allows the LED to indicate shorts (fast blinking) or enables checking for opens by observing voltage changes at port pins (slow blinking). This is a powerful feature for self-diagnosis after assembly or during troubleshooting.
• SMD Parts Installation: For kits including SMD parts, the manual stresses installing them before proceeding with Step 1, indicating a specific assembly order for different component types.
• Power Supply Voltage: The warning about not exceeding 12V to prevent U5 from overheating is a direct maintenance tip to prolong the life of a critical component.

Overall, the manual provides a comprehensive framework for building, operating, and maintaining the DSO 138 Oscilloscope, making it accessible even for those with limited prior experience in electronics assembly.

JYE Tech 13803K Specifications

General

Category	Test Equipment
Model	13803K
Brand	JYE Tech
Type	Oscilloscope
Channels	2
Input Impedance	1 MΩ
Sampling Rate	1 MS/s
Sensitivity	10 mV/div to 5 V/div
Coupling	AC/DC
Display	2.4" TFT LCD
Resolution	320x240 pixels
Power Supply	DC 9V (8-10V acceptable)