Download dso 138

Soldering Hints
DSO 138 Oscilloscope DIY Kit
1 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.
3 Cut unused leads
flush with cutter.
User Manual
Before you start
Tools you need
4 Screw driver
1 Iron (20W)
2 Solder wire
1 Check part values & quantities against part list
2 Always meter resistor values before soldering
5 Flush cutter
6 Tweezers
3 Multimeter
14. Electrolytic capacitors
3 Understand all part polarities and orientations
Install all SMD parts before proceeding
to Step1 if you purchased kit 13804K.
1. Resistors
5. USB Socket *
Solder positive pole
(the longer lead) to
the square pad
C19, C21, : 100
C22, C24,
C25, C26
15. Power connector
9. Pin header (for power)
: DC005
J10
Note:
J4
Always meter resistor
values before soldering
R7, R36
Face the opening
outward
: USB mini -B
Note:
This connector is
optional.
: 180
J9
: 2 Pin
16. Pin-header (male) *
R8, R12, R13 : 120
R1, R14, R16 : 100K
R9, R15, R26 : 1K
R2
: 1.8M
R3
: 200K
R11
: 150
R4
: 2M
R38
: 1.5K
R5
: 20K
R28, R40
: 470
R6
: 300
R37, R39
: 10K
R10
10. Transistors
6. Tact Switches
: 3K
SW4, SW5, : 6 X 6 X 5mm
SW6, SW7,
SW8
2. HF-Chokes
: 100
H
3. Diodes
Cathode
D1
D2
C1, C9,
C10, C11,
C14, C15,
C16, C17,
C18, C20,
C23
: 0.1
F
Q1
: 8550
Q2
: 9014
Packages are similar.
Do not mix up!
U4
: 79L05
U5
: 78L05
Packages are similar.
Do not mix up!
C2
: 330pF
C7, C8
: 12 0p F
C3
: 3pF
C12, C13
: 22pF
C5
: 1pF
: 1N5819
: 1N4004
J5
J6
: 1 X 3 pin
: 1 X 4 pin
Note:
These pin-headers are
optional.
17. Pin-header (female)
11. Regulators
7. Ceramic Capacitors
L1,L3,L4
F / 16 V
12. Capacitor trimmers
C4, C6
8. LED
: 5 - 30pF
J7, J8
: 1 X 2 pin
J3
: 2 X 20 pin
18. Slide switches
SW1, SW2,
SW3
: 2P3T
(or 1N4007)
4. Crystal
19. BNC connector
13. Power inductor
J1
Y1
JYE Tech Ltd.
: 8MHz
Solder positive pole
(the longer lead) to
the square pad
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D3
: 3mm, green
L2
: 1mH/0.5A
: BNC
Note:
The thicker pins need
to heat up longer to get
good soldering result.
Page 1
20. Test signal ring
21. JP3
22. LCD Board
1 ) Make a small ring with a
lead cut-off.
Finished look
Note: Install to the side
opposite to LCD panel.
Short JP3 with solder
2 ) Solder the ring to the two
holes of J2 (as shown in
the photo).
J1
: 2 X 20 pin
J2, J3
: 1 X 2 pin
1 ) JP1, JP2, JP5, and JP6 at bottom side should be kept open for normal running mode.
2 ) The USB connector do not have function. It was provided for future or user own use.
3 ) A 9V DC power supply (> 200mA capacity) is required to run the scope. Power supply is not included in the kit.
A. Check voltages
B. Attach LCD board
1 Apply 9V power to J10 (or J9).
2 Check voltage at TP22. It should be around +3.3V.
3 If voltage at TP22 is good disconnect power. Short JP4
with solder permanently .
1
Plug LCD board into the female headers J3, J7, and J8
on the main board.
C. Verify
A. U se
1 Connect power supply again. You should see LCD
lights up and oscilloscope panel displayed.
2 Press various buttons and move switches to verify
their functions.
1 Attach probe clips to J1.
2 Touch the red clip with your finger. Do you see signal
from your finger?
1
2
2
Trigger LED blinking twice
indicates booting-up is good.
3
Troubleshooting
LCD Dark
Is voltage at V+ No Check power
good?
Is R36 value correct
and soldered good?
No
No
Press SW8. Does LED blink?
Fix R36
Yes
Yes
Check J3 soldering for
possible opens or shorts
Check J1 soldering on LCD
board for possible opens
or shorts (use Test Mode)
Do you get about 3V No
Check R36 and
between J1 pin 16 &
power again
18 on LCD board?
Yes
Check LCD
board
NOTE 2:
LED will be blinking constantly if MCU
(U1) can not detect valid LCD controller.
Check LCD pin-header soldering.
Short JP4 if it has not been
done. See Step 2 above.
supply
Yes
NOTE 1: The voltages in the photo are for reference only.
The voltages on your board could be different.
But they should be close to the values shown.
No Display
(No backlight)
No Trace
No
Are the values of AV+ and
AV- correct?
Visit forum for detailed
troubleshooting guide
Yes
Set CPL switch to GND No Check U2B, U2C and
and measure V1 and V2.
related parts around
Are they correct?
these two amplifiers
Yes
Check R12 and C8
JYE Tech Ltd.
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Check +3.3V voltage
Check Y1, C12, C13
Check LED installation
Test Mode
NOTE 3:
Make sure U1 and LED working
(you see LED blinks twice at pressing
RESET) before using Test Mode.
-5.0V
4.99 V
3.3V
*
0.19 V
*
*
*
6.43 V
9 .39V
*
(In put Voltage)
8.60V
-8.11V
-8.08 V
What it is and how it works
Voltage
R eferences
5.02 V
*
3.3V
PIN 1
8 .34V
Test Mode is used to find out possible opens (for all port pins) and shorts
(for pins PB0 - 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 0V 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.
*
-1.39 V
2.16 V
0 .81V
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.
** 1.66 V **
You need to find out the shorts first.
0V
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 Place the negative pen of volt-meter
at a spot which is supposed being connected to a port pin there may be
here to do voltage measurements.
open between the spot and the port pin.
Tech Support: www.jyetech.com/forum
NOTES:
*: These voltages are input voltage dependent. T he val ues
shown were measured when input voltage was 9.39V.
**: These voltages are measured when CPL switch (SW 1)
is set t o GND position.
Page 2
Probe Calibration
Display and Controls
Trigger Level
R eadout
Oscilloscope
M ode
Connector
for Probe
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 frequency signals. This can be done with the help of
the built-in test signal. To do this please follow the steps below.
Horizontal
Position
Connectors
for Pow er Supply
[OK]:
HOLD / RUN
Selection
[+] or [-]:
[CPL]:
Couple
Selection
Parameter
A djustment
[SEN1] :
Sensitivity
Selection 1
[SEL]:
Parameter
Selection
[SEN2]:
Sensitivity
Selection 2
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).
C onnect red clip to
test signal output
C6
C4
5. Set [SEN1] switch to 1V and [SEN2] switch to X1while keep all other
settings unchanged. Adjust C6 so that sharp rightangle waveform is
displayed.
Trigger
Level
Indicator
Vertical
Position
Indicator
Timebase
(s/div)
Sensitivity
(V /div)
Couple
Trigger
Slope
Trigged
Indicator
R eset
Button
Trigger
Mode
Connections
Power Supply:
Connect DC power supply to J9 or J10. The power
supply voltage must be in the range of 8 - 12V.
Probe:
Connect probe to J1.
A
Not enough
B
1. Power supply voltage must not exceed
12V. Otherwise U5 will get hot.
2. Allowed maximum signal input voltage
is 50Vpk (100Vpp) with the clip probe.
Operations
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.
Perform a system reset and re-boots the oscillscope.
Tips
Press [SEL] so that timebase is highlighted. Hold down [OK] button for about 2 seconds. This will turn
on/off measurement readouts.
Press [SEL] & [+] simultaneously: Save currently displayed waveform to non-volatile memory.
Press [SEL] & [-] simultaneously: Recall saved waveform
Triggers are events that indicate signal voltage acrossing
a set level (i.e. trigger level) along a specified direction
(i.e. trigger slope, rising or falling). Oscilloscope uses
triggers as reference points in time for stable waveform
display and measurements.
In auto mode oscilloscope will perform display refresh no
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.
This is to fix the mismatch between 0V trace and VPos indicator. To do this set couple switch [CPL] to GND position.
Press on [SEL] button to make VPos indicator highlighed. Hold down [OK] button for about 2 seconds. You will see
VPos indicator aligned to 0V trace when you release [OK] button. You may see some residue mismatch remains at
the highest sensitivity settings. This is normal.
In normal mode oscilloscope will only perform display
refresh when there are triggers. If no triggers happen
waveform display will stay unchanged.
Hold down [+] and [-] buttons simultaneously for 2 seconds.
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.
Highlight trigger level indicator and hold down [OK] button for 2 seconds.
Highlight HPos indicator and hold down [OK] button for 2 seconds.
JYE Tech Ltd.
Good
Waveform Save/Recall
Triggers and Their Modes
Press on [SEL] button: Select parameter to be adjusted. The selected parameter will 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
Press on [Reset] button:
C
Too much
Turn On/Off Readouts
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Normal and single modes are useful for capturing sparse
or single waveform.
Specifications
Max realtime sample rate
Analog bandwidth
Sensitivity range
Max input voltage
Input impedance
Resolution
Record length
Timebase range
Trigger modes
Trigger position range
Power supply
Current consumption
Dimension
Weight
1MSa/s
0 -- 200KHz
10mV/div - 5V/div
50Vpk (1X probe)
1M ohm/20pF
12 bits
1024 points
500s/Div -- 10us/Div
Auto, Normal, and Single
50%
9V DC (8 12V)
~120mA
117 x 76 x 15mm
70 gram (without probe)
Tech Support: www.jyetech.com/forum
JYE Tech Ltd.
Tel. +86-0773-2113856
www.jyetech.com
Page 3
5
4
CPL
AIN
**
TP1
J1
BNC
SW1A
DC 1
3
AC 3
0.1u
C2
2
GND 4
220pF
SEN1
SEN2
R1
100K
10mV
1
C3
3pF
0 1V
3
SW2A
2
X1
AV+
U2B
TL084/SO
1V
5
4
D
SW3A
1
R6
X2 3
300
X5
1 6V
2
10
9
C8
AV-
180
R9
AVR8
1K
R10
3K
AV-
120
2
C5
1pF
R11
R20
10K
R21
3.3K
7
C6
R5
30pF
AV+
10K
8
10K
TP4
5
TP6
12
SW3B
6
7
R19
1.5K
3.3K
V3
100K
AV+
R23
6
R14
AV+
C7
120pF
CPLSEL
18
19
20
39
40
41
42
43
TL_PWM
45
VGEN
46
LCD_nRD
21
LCD_nRESET 22
BTN4
25
BTN3
26
BTN2
27
BTN1
28
TP7
R22
1.5K
20K 1%
SW1B
7
VSENSEL1
6
8
R24
14
VSENSEL2
TP8
R13
120
R25
1.5K
3.3K
13
U2D
TL084/SO
AV+
C10
0.1u
LCD_nCS
LCD_RS
LCD_nWR
AV-
TP5
TLVL
JP3
C11
C9
0.1u
TP33
J4 USB_mini_B
USB
Buttons
R31 1.5K
1
2
3
4
5
VBUS
DD+
ID
GND
R29
R30
22
22
USBDM
USBDP
+
BTN2
BTN4
J2
TP21
JP4
VOUT
VOUT
GND
J9
+
-
1
2
+3.3V
10K
JP5
SWDIO
SWCLK
LED-K1
LED-K3
IM3
DB0
DB2
DB4
DB6
LCD_nRESET
JP6
R35
10K
TESTSIG
R26
1K
9 3V
8 6V
D2
1N4004
J10
1
3
2
+
-
1
+3.3V
C22
100uF
Q1
8550
8 6V
V+
TP23
2
4
1
0 2V
3
8 3V
R37
V+
100uF
2
VIN
L3
100uH
+5V
U5
VOUT
1
GND
LM78L05/T92
TP24
C24
*
5V
IN
OUT
3
AV-
U4
79L05/TO92
D
44
R27
1K
TP10
nRST
7
C14
VDDA
VSSA
VDD_1
VDD_2
VDD_3
1
9
SW8
0.1u
+3.3V
C15
0.1u
L4 100uH
+3 .3V
C26
100uF
8
24
36
48
+3.3V
23
35
47
C
C16
C17
C18
0.1u
0.1u
0.1u
R28
470
+3.3V
VGEN
2
Q2
9014
C21
100uF
TP27 TP28 TP29 TP30
0.1u
C23
R39 0.1u
10K
4
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R40
470
+3.3V
1
2
LCD_RS
LCD_nRD
+3.3V
B
LED-A
LED-K2
LED-K4
V+
R36
180
DB1
DB3
DB5
DB7
+3.3V
LCD HEADER
R41
10K
R42
1K
0 8V
2. Parts in dash-line boxes are SMD devices.
V-MON
JYE Tech Ltd.
WWW.JYETECH.COM
TP31
TP32
These voltages are power voltage dependent The
values shown were measured at 9 3V power voltage
3
J8
1
2
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
the values shown. Please refer to part
list.
1 4V
6 4V
J7
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
Notes:
1. Part values used could be different to
C25
100uF
100uF
*
JYE Tech Ltd.
2
L1
100uH
L2
1mH/1A
DC 9V
5
5V
*
R38
1.5K
AV+
C20
TP25 V-
1
1N5819
10K
*
TP20
3
C19
8 1V
TP26
D1
2
*
3 3V
*
*
LM1117 -3.3/TO263
*
1
2
A
+3.3V
BOOT0
J3
1
2
3
4
*
TP22
U3
VIN
22pF
JP1
PC13/TEMPER/RTC VSS_1
PC14/OSC32_IN
VSS_2
PC15/OSC32_OUT VSS_3
LCD_nCS
LCD_nWR
IM0
+3.3V
3
C13
LCD Module Connector
J6
Test Signal Terminal
TP16
TP17
Caution:
Power supply voltage can
not be higher than 12V.
Y1
8MHZ
5
D3
R34
SW7
Power Supply
PD0/OSC_IN
22pF
6
STM32F103Cx
+3.3V
J5
RX1
TX1
VBAT
LED
BTN3
SEL
1K
1K
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
PB8
PB9
PB10
PB11
PB12
PB13
PB14
PB15
USE SWD DEBUG
MODE ONLY
SW5
-
R32
R33
PD1/OSC_OUT
SW4
TP14
TP15
B
1
2
3
C12
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PA8
PA9
PA10
PA11
PA12
PA13
PA14
PA15
0.1u
SW6
Uart
2
3
4
R16
100K
SWD Port
BTN1
OK
Trigger
Level
AV-
Analog Channel
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
JP2
1K
8
5
C
SW2B
5
AV-
R18
R15
AV+
R4 2M 1%
R17
TRIG
120pF
1
U2A
TL084/SO
TP11
TP12
TP13
8
4
R12
120
30pF
3
10
VSENSEL2 11
VSENSEL1 12
CPLSEL
13
14
15
V-MON 16
TESTSIG 17
29
TX1
30
RX1
31
USBDM
32
USBDP
33
SWDIO 34
SWCLK 37
LED
38
TP3
6
R3
200K 1%
C4
ADCIN
V2
R7
AV+
TP9
U1
**
AV+
U2C
TL084/SO
7
R2 1.8M 1%
1
MCU
0V
V1
TP2
C1
2
**
These voltages were measured
when SW1 is at GND position.
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