JYE Tech DSO 138 User manual

Iron (20W)
1
Solder wire
Multimeter
Screw driver
User Manual
DSO 138 Oscilloscope DIY Kit
2
3
4
Flush cutter
5
Tools you need
Tweezers
6
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JYE Tech Ltd.
1. Resistors
Always meter resist or
values before soldering
Note:
R1, R14, R16 100K
R2
1.8M
:
:
R3
200K
:
R4
2M
:
R5
20K
:
R6
300
:
R7, R36
180
R8, R12, R13
120
:
:
R9, R15, R26 1K :
R10
3K
:
R38
1.5K
:
R28, R40
470
:
R37, R39
10K
:
L1,L3,L4
100 H
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 5 mm
6. Tact S witches
:
SW4, SW5,
SW6, SW7,
SW8
7. Ceramic Capacitors
0.1 F
:
330pF
:
3pF
:
C1, C 9,
C10, C11,
C14, C15,
C16, C17,
C18, C20,
C23
1pF
:
C7, C8
12 0 p F :
C12, C13
22pF
:
C2
C3
C5
D3
8. LED
:
3mm, gree n
Solder positive pole
(the longer lead) to
the s quare pad
J9
2 Pin
9. Pin header (for power)
:
Face the opening
outward
855 0
10. Transistors
:
Q1
901 4
:
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
:
100 / 1 6 V
F
So lder pos itive pole
(the longer lead) to
the square p ad
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 con nector
:
Put leads through mounting holes from the side with
part outline. Ensue component evenly tou ch PCB.
1
Sol der leads at the other side. Solder should fully
fill and cover so ldering 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
Un derstand all part polarities and orientations
2
3
Before you start
Page 1
Packag es are similar.
Do not mix up!
Packages are similar.
Do not mix up!
The thicker pins need
to heat up longer to get
good soldering result.
Note:
R11
150
:
These pin- h eader s a re
optional.
Note:
Install all SMD parts before proceeding
to Step1 if you purchased kit 13804K.
This connector is
optional.
Note:

1
C. Verify
Co nnect power supply again. You should see LCD
lights up and oscillo scope pane l d isplayed.
2Press various buttons and move switches to verify
their functions.
1 ) M ake a small r ing with a
lead cut-o ff.
20. Test signal ring
2 X 20 pin
22. LC D Board
:
J1
1 X 2 pin
:
J2, J3
2 ) Solder the ring to the two
holes of J2 (as show n in
the photo).
21. JP3
Short JP3 with solder Note: Install to the side
opposite to LCD panel.
3 ) A 9V DC power supply (> 200mA ca pacity) is required to run the scope. Power su p ply is not included in the kit.
1
A. Check voltages
2
3
Apply 9V power to J10 (or J9).
2 C heck voltage at TP 22. It should be around +3.3V.
3If voltage at TP22 is good disconne ct power. S hort JP4
with solder .permanently 1
B. Attach LCD board
Plug LCD board into the female headers J3, J7, and J8
on th e main board.
1
A. U se
Attach probe clips to J1.
2 To uch the red clip with your finger. Do you se e signal
from your finger?
1
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JYE Tech Ltd.
Troubleshooting
Is voltage at V+
good? Check power
supply
Is R36 value correct
and soldered good?
Do you get about 3V
between J1 pin 16 &
18 on LCD board?
Fix R36
LCD Dark
No
No
Yes
Yes
(No backlight)
No
Yes
Check R36 and
power again
Check LCD
board
Press SW8. Does LED blink? Check Y1, C12, C13
Check LED installation
Check +3.3V voltage
Check J3 soldering fo r
possible opens or shorts
No Display
Yes
No
Check J1 soldering on LCD
board for possible opens
or s horts (us e Test Mo de)
2
8.60V
9.39V
8.34V
3.3V
-1.39 V
2.16 V
0.81V
6.43 V0.19 V
5.02 V
3.3V
4.99 V
-5.0V
-8.08 V
-8.11V
1.66 V0V
*
*
**
*
*
*
**
**
Voltage
Referenc es
(Input Vol tage)
*: These v olt ages ar e inpu t voltage d ependen t. The v al u es
sho w n w ere measured when inpu t voltage w as 9.39 V.
**: These voltage s are mea sure d w hen CPL switch (SW1)
is set t o G ND pos ition.
NOT ES:
Place the negative pen of volt-meter
here to do voltage measurements.
Finished look
Short JP4 if it has not been
done. See Step 2 above.
Check U2B, U2C and
related parts around
these two a mplifiers
No
Se t CPL switch to GND
and me asure V1 and V2.
Are they correct?
Chec k R12 and C 8
Visit forum for detailed
troubleshooting guide
Are the val ue s of AV+ a nd
AV- correc t?
No Trace
Yes
No
Yes
The voltages in the photo are for reference only.
The voltage s on your b oard could be diffe rent.
But they should be close to the values show n.
NOTE 1:
www.jyetech.com/forum
Tech Support:
Trigge r LED blinking twice
indicates booting-u p is good.
Page 2
Test Mode
What it is and how it works
Test Mode is used to find out pos sible opens (fo r all port pins) and shorts
(for pins PB0 - 15 and PC13-15). When entered it first checks PB and PC
pins with special pattern s to find out possible shorts. If found LED will be
fast blinki ng. Otherwise, it generate 3.3V and 0V alternatively at each port
pins (PA, PB, PC an d PD) in cycle of about 4 seconds. Thes e sig nals can be
used to check for opens.
How to us e
Hold do wn SW4 and press RESET to enter Test Mode.
If yo u see LED fast bli nking that means there are shorts on PB or PC pins.
You need to find out the shorts first.
If yo u see LED slowly blinking use a volt-meter to check each pi n related
connections that are suspected open. When you don t see voltage change
at a spot which is suppos ed being co nnected to a port pin there may be
open between the spot and the port p in.
1.
2.
3.
PIN 1
Mak e sure U1 and LED working
(y ou see LED blinks twice at pressing
RESET) b efore using Test Mode.
NOTE 3:
LED will be blinking constantly if MCU
(U1) can not detect vali d LCD controller.
Check LCD pin-heade r sold ering.
NOTE 2:
1 ) JP1, JP2, JP5, and JP6 at bottom side sh o uld be kept open for normal runni ng mode.
2 ) The US B conne ctor do not have function. It was provided for future or user own use.

HOL D RUN/
Connec tors
for Pow er S upply
Trig ger Level
Rea d out
Horizontal
Positio n
Osc i ll osco p e
Mode
Connec tor
for Probe
Couple
Se l ection
Se nsiti vity
Se l ect ion 1
Sen s iti vity
Sel ection 2
Vertic al
Position
Indicator
Se nsitivi ty
Couple
Timeba se
Trigge r
Mod e
Trig ger
Slop e Trigg ed
Indicator
Trig ger
Leve l
Indicator
Parameter
Se l ection
Para m eter
Adjustment
Res et
Butt on
[+] or [-]:
[SEL]:
[OK]:
[CP L]:
[SEN1] :
[SEN 2]:
Display and Controls
Connections
Power Supply:
Co nnect DC power supply to J9 or J10. The power
supply voltage must be i n the range of 8 - 12V.
Probe:
Connect probe to J1.
Power supply voltage must not exc eed
12V. Otherwi se U5 will get hot.
1.
Allowed maximum signal input voltage
is 50Vpk (100Vpp) with the clip pro b e.
2.
Operations
Press on [SEL] button:
Select parameter to be adjusted. The sel ected 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
signal and connected to ground (0V input).
Change [S EN1] or [SEN2] switch:
Adjust sensi tiv ity. 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:
Perform a system reset and re-boots the oscillscope.
Tips
This is to fix the mismatch between 0V trace and VPos indicator. To do this set couple switch [CPL] to GND po sition.
Press on [SEL] button to make VPos indicator highlighed. Hold down [O K] 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 highes t sensitivity settings. This is normal.
Probe Calibration
Because there is alwa ys 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 fol low the steps below.
Connect red cli p to
test s ign a l output
Leave bl ack cl ip
un- con nected
Connect the red clip to the test signal terminal and le ave the
black clip un-connected (see p hoto at ri ght).
1.
Set [S E N1] switch to 0.1V an d [SEN2] switch to X5 .
Set [C PL] switch to AC or DC.
2.
Adjust timebase to 0.2 m s. You should see waveform similar
to that shown in photos below. If t races are not stable adjust
trigger lev el (the pink triangle on righ t screen border) so as
you get a stable display.
3.
Turn C4 (capacit or trim mer) with a small screw driver so that
th e waveform displays sharp rightangle (photo C).
4.
C4
C6
Set [SEN1] switch to 1V an d [SEN2] switch to X1while keep al l other
settin g s unchanged. Adjust C6 so that sharp rightang le waveform is
di splayed.
5.
A Not en ough B Too much C Good
Analog bandwidth
Se nsi tivity range
Resolution
Record length
Max realti me sampl e rate
Timebase range
Max input volta ge
Input impedance
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/Di v -- 10us/Div
9V DC (8 12V)
~120mA
117 x 76 x 15mm
70 gram (withou t probe)
Trigger mode s
Trigger position range
Auto, N ormal, and Singl e
50%
Specifications
Waveform Save/R ecall
Press [SEL] & [+] simultaneously: Save currently di splayed waveform to non-volatile memory.
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Tel. [phone]
Triggers and Th eir Modes
Triggers are even ts that indicate signal volt age acrossing
a set lev el (i.e. trigger le vel) along a specified direction
(i.e. trigger slop e, rising or falling). Oscilloscope uses
triggers as reference poin ts in time for stab le waveform
dis play and measurements.
In aut o mo d e oscill oscope will perform disp lay refresh no
matt er triggers happen or not. When triggers are detected
waveform display will be dis p layed with reference to
trigger points. Otherwis e, disp lay waveform at ramdom
reference points.
In normal mode oscilloscope will onl y perform dis play
refresh whe n there are tri ggers. If no t rigg ers happen
waveform display will stay u nchan g ed.
Single mode is the sam e as normal mode except that
oscillo scope will enter HOLD state after a trigger has been
detected and waveform display has bee n up d ated.
Normal and single modes are us eful for capturing sparse
or single waveform.
Se l ection
(s/div)
(V/d iv )
Tech Support: www.jyetech.com/forum
Page 3
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JYE Tech Ltd.
Turn On/Off Readouts
Press [SEL] so that timebase is highlighted. Hold down [OK] button for ab out 2 seconds. This wi ll turn
on/off measurement readouts.
Press [SEL] & [-] simultaneously: Recall saved waveform
Hold down [+] and [-] buttons simultaneousl y for 2 seconds.
Highl ight trigger level indicator and hold down [O K] button for 2 seconds.Highl ight trigger level indicator and hold down [O K] button for 2 seconds.
Highl ight HPos indicator and ho ld down [OK] button for 2 seconds.

Page 4
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JYE Tech Ltd.
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
8 3V
*
AC
0 1V
1V
GND
X1
X2
X5
10mV
DC
USE SWD DEBUG
MODE ONLY
V1
V2
V3
AIN
V-
TLVL
DC 9V
-
+
Analog Channel
USB
Uart
Power Supply
-
+
Buttons SWD Port LCD Module Connector
MCU
JYE Tech Ltd.
WWW J.YETECH.COM
jyetek gmail.com
Notes:
Part values used could be different to
the values shown Plea
.
se refer to part
list
.
1.
2.
Parts in dash line boxes
-
are SMD devices.
Test Signal Terminal
3 3V
5V
8 6V
0 8V
1 4V
6 4V
8 6V
*
*
*
0 2V
*
8 1V
*
5V
*
9 3V
*
These voltages are power voltage dependent The
values shown were measured at 9 3V power voltage
*
Caution
:
Power supply voltage can
not be higher than 12V
.
0V
1 6V
**
**
**
These voltages were measured
when SW1 is at GND position.
CPL
SEN1
SEN2
Trigger
Level
OK
+
-
SEL
VGEN
IM0
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
ADCIN
VSENSEL2
VSENSEL1
CPLSEL
LCD_n RD
LCD_n RESET
LCD_n CS
LCD_RS
LCD_n WR
BTN2
BTN1
BTN3
BTN4
TRIG
RX1
TX1
TX1
RX1
USBDM
USBDP
USBDM
USBDP
SWCLK
SWDIO
SWDIO
SWCLK
LCD_n WR
DB1
LCD_RS
DB7
LED K4-
LCD_n RD
DB3
DB5
DB0
IM3
LED A-
DB6
DB2
LCD_n RESET
DB4
LCD_n CS
LED K2-
LED K3-
LED K1-
TESTSIG
VGEN
BTN4
V-MON
TESTSIG
VSENSEL1
VSENSEL2
CPLSEL
LED
BTN3
BTN2
BTN1
LED
TL_PWM
V-MON
AV-
AV+
AV+
AV+
+3.3V
+ .3 3V
V+
AV-
V+
+3.3V
+5V
+ .3 3V
AV+
+3.3V
+ .3 3V
+ .3 3V
AV-
AV-
AV-
AV-
AV-
V+
+3.3V
+ .3 3V
+ .3 3V
AV+
AV+
AV+
AV+
AV+
+3.3V
+ .3 3V
SW8
R1 100K
TP2
TP24
C14
0.1u
C12
22pF
TP6
C7
120pF
TP12
C8
120pF
C21
100uF
J6
1
2
3
4
C10
0.1u
JP2
TP13
R16
100K
J5
1
2
3
R9 1K
U1
STM32F103Cx
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
VBAT
PC13/TEMPER R/TC
PC14/OSC32_IN
PC15/OSC32_OUT
PD0/OSC_IN
PD1/OSC_OUT
nRST
VSSA
VDDA
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PB0
PB1
PB2
PB10
PB11
VSS_1
VDD_1
PB12
PB13
PB14
PB15
PA8
PA9
PA10
PA11
PA12
PA13
VSS_2
VDD_2
PA14
PA15
PB3
PB4
PB5
PB6
PB7
BOOT0
PB8
PB9
VSS_3
VDD_3
R41 10K
J10
2
3
1
TP31
J7
1
2
L2
1mH/1A
C9
0.1u
R42 1K
J8
1
2
R11
TP28
D1
1N5819
12
R23 10K
TP29
Q2
9014
2
SW4
C19
100uF
R18 3.3K
TP30
U4
79L05/TO92
2 3
IN OUT
C11
0.1u
TP21
JP5
SW3A
2
1
3
4
R21 3.3K
SW1A
2
1
3
4
C23
0.1u
U5
LM78L05/T92
3
2
1
VIN
GND
VOUT
J9
1
2
Q1
8550
1 3
TP20
J1
BNC
J2
1
2
U2B
TL084/SO
5
6
7
U2C
TL084/SO
10
9
8
SW2A
2
1
3
4
R7
180
R31 1.5K
C25
100uF
TP3
SW6
TP5
R4 2M 1%
R38
1.5K
C24
100uF
R35 10K
JP6
D2
1N4004
R26 1K
R32 1K
TP1
D3
TP4
TP33
C3 3pF
U2D
TL084/SO
12
13
14
R33 1K
TP26
R8
120
C18
0.1u
C2 220pF
JP3
R24 3.3K
C6
30pF
R34
10K
TP23
R28 470
R30 22
TP10
U3
LM1117 -3.3/TO263
1
3 2
4
GND
VIN VOUT
VOUT
R40 470
JP4
C20
0.1u
L3
100uH
R2 1.8M 1%
SW1B
6
5
7
8
C5 1pF
R37
10K
R14 100K
R17 10K
TP16
J4 USB_mini B_
1
2
3
4
5
VBUS
D-
D+
ID
GND
R36
180
R13
120
R19
1.5K
TP22
R3
200K 1%
TP9
R39
10K
R29 22
R6
300
Y1
8MHZ
C26
100uF
TP25
TP17
C22
100uF
SW3B
6
5
7
8
L4 100uH
C4
30pF
JP1
TP7
TP14
R25
1.5K
R5
20K 1%
SW2B
6
5
7
8
TP27
R12
120
R20 10K
U2A
TL084/SO
3
2
1
C16
0.1u
TP15
R10 3K
C1
0.1u
L1
100uH
R15
1K
SW5
TP8
R22
1.5K
C17
0.1u
J3
LCD HEADER
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
25 26
27 28
29 30
31 32
33 34
35 36
37 38
39 40
R27 1K
C15
0.1u
TP11
TP32
SW7
C13
22pF