Oppo A6s 5G CPH2789 ISP Pinout [Tested & Complete]

Here is the tested ISP pinout for the OPPO A6s 5G CPH2789. If you handle dead boot, network-locked, or PC-not-detected Samsung M-series phones, the ISP connection lets you reach the UFS memory chip directly without removing it from the board. Use it to dump firmware, remove FRP, clear MDM, or restore a working device after a bad flash.

The OPPO A6s 5G uses the MediaTek Dimensity 6300 platform and model code CPH2789. Check the model number before starting because the 4G and 5G A6s variants use different hardware. Do not apply this pinout to another OPPO model or board revision.

OPPO A6s 5G ISP Pinout Image

The original board image below shows the marked ISP points near the storage area. RXOP and RXON are the receive pair, TXOP and TXON are the transmit pair, and RST is the reset line. Use GND from a clean ground point on the motherboard.

Pin Labels and Their Functions

• Rst – Reset signal
• TXOP – Transmit Data Positive
• TXON – Transmit Data Negative
• RXOP – Receive Data Positive
• RXON – Receive Data Negative
• GND – Ground (connect to any ground point on the board)

When This ISP Pinout Is Useful

• Phone stuck on the OPPO logo after a failed flash
• Device not detected by the computer
• Storage identification and backup work
• Boot or partition repair
• Firmware reading and writing through a supported service box
• Board-level software repair when normal flashing mode is unavailable

Tools Required

• UFI Box, Easy JTAG Plus, Flash64, or another compatible box
• Fine jumper wire and a sharp soldering tip
• Microscope or strong magnifier
• No-clean flux and 99% IPA
• Multimeter for continuity and short testing
• Correct adapter and a stable USB cable

OPPO A6s 5G CPH2789 Specifications

Device	OPPO A6s 5G
Model	CPH2789
Chipset	MediaTek Dimensity 6300
Storage	256GB
RAM	8GB plus extended RAM
Display	6.75-inch
Battery	7000mAh typical capacity

How to Connect OPPO A6s 5G ISP

1.Confirm that the board belongs to OPPO A6s 5G CPH2789.

2. Disconnect the battery before cleaning or soldering.

3. Remove the shield carefully and clean the marked area with IPA.

4. Use the image to locate RXOP, RXON, TXOP, TXON, and RST.

5. Connect GND to a clean ground point on the board.

6. Solder short jumper wires and check each line with a multimeter.

7. Connect the wires to the correct UFS box adapter.

8. Open F64 Ultra Suite and connect/detect the UFS.

9. The software successfully reads the UFS/device information and displays the Android partitions.

10. Go to Partition Tasks and select the frp partition.

Create a backup of the FRP partition before performing any operation.

11. Select the Format operation for the frp partition.

Wait until F64 shows: Partition frp Format Successful

Common Problems and Fixes

• No detection: check GND, adapter direction, voltage settings, and solder joints.
• Unstable detection: shorten the jumper wires and inspect RX/TX lines for bridges.
• Read error: clean the points again and select the correct storage profile.
• Board heating: disconnect power immediately and check for a short to ground.
• Wrong storage information: stop the operation and confirm the model and board revision.

Safety Notes

Remove the battery before soldering. Use the voltage and adapter recommended by your repair box. Shorting the wrong pins can damage the storage chip or motherboard. Start with identification, keep the original backup safe, and only then continue with a write or repair operation.

Frequently Asked Questions

Final Thoughts

This CPH2789 image gives the marked RXOP, RXON, TXOP, TXON, and RST locations for OPPO A6s 5G ISP work. Confirm the board before connecting, check every jumper, and make a backup before changing storage data.