Spark Logic

DSO138 oscilloscope connection guide

DSO138 oscilloscope DSO138 13803K / 13804K wiring guide with power, signal assignments, and bench checks.

DSO138 13803K / 13804K

7 contacts Current package

JYE Tech · JYE Tech kit connectors for the BNC input, DC supply and test signal.

Power the oscilloscope

Required

Use a regulated 9 V DC adapter with a center-positive 5.5 × 2.1 mm plug and a current rating above 200 mA.

Bench checks

  • Verify the polarity and the unloaded adapter voltage before inserting the plug. The kit accepts 8–12 V DC.
  • Power on with the BNC probe disconnected and set coupling to GND. Confirm that the display starts and shows a steady zero trace.

JYE Tech DN138-01v05, Operation and Probe Calibration on p. 3 and schematic on p. 4.

Connection scenarios

Measure a 1.5 V cell

Set DC coupling and start at 1 V/div with a ×1 probe. Connect a single loose 1.5 V cell directly to the probe clips.

Measure a 1.5 V cell1.5 V+−J1 centerJ1 shell

Bench checks

  • Record the zero position with coupling set to GND, then return the switch to DC.
  • The trace moves upward from zero by the cell voltage divided by the volts-per-division setting. Compare the displayed reading with a multimeter if you have one.

JYE Tech DN138-01v05, Operation and Probe Calibration on p. 3 and schematic on p. 4.

DSO138 13803K / 13804K wiring map

Highlighted contacts are used in the required step or selected circuit. Select a contact to inspect it.

J1 BNC input
Viewed into the input socket. The center is the signal.
J10 DC barrel jack
Viewed into the DC jack. The center is positive. J10 is beside the power header on the PCB.
J9 alternate DC header
PCB pin numbers from the schematic. Use one power entry at a time.
J2 test output
One exposed test contact. Both PCB pads of the terminal carry the same signal.
Selected pin details

J10 sleeve · DC_RETURN

Supply return · Ground

Outer sleeve of the barrel jack.

JYE Tech DN138-01v05, Operation and Probe Calibration on p. 3 and schematic on p. 4.

Electrical limits · Pin in the reference

Models and documents

This map covers original JYE Tech kits 13803K and 13804K. The optional J4 Mini-USB footprint is listed without a user function. Use J10 or J9 for power.

DSO138 13803K / 13804K
JYE Tech kit connectors for the BNC input, DC supply and test signal.