Jmmal10 Test Point Upd 2021 May 2026

The JMM-AL10 refers to the Honor 6C Pro (also known as the Huawei V9 Play). When users mention "test point upd," they are typically looking for the hardware test points required to force the device into USB COM 1.0 (MTK Bootrom) mode for servicing, such as bypassing FRP (Factory Reset Protection) or removing a Huawei ID. The Technical "Story": Preparing Your Device

To properly prepare your Honor 6C Pro for a "test point" update or repair, follow these steps: Hardware Prep: Power off the device completely. Remove the back cover carefully to access the motherboard.

Identify the two specific gold pads (test points) located near the battery connector or the CPU shielding. Establishing the Connection:

Using a pair of fine-tip metal tweezers, short (connect) the two test points together.

While holding the short, plug the device into your PC via a USB cable.

If done correctly, your PC should recognize the device in Device Manager under "Ports (COM & LPT)" as MediaTek USB Port or Huawei USB COM 1.0. Software Execution: Launch a servicing tool such as UnlockTool or ChuyenMobile. Select the Huawei V9 Play / Honor 6C Pro (JMM-AL10) model.

Execute the desired function, such as "Erase FRP" or "Remove Huawei ID". Visual Guidance jmmal10 test point upd

The JMMAL10 test point updates, or "jmmal10 test point upd," refine the hardware debugging process by addressing signal integrity, relocating the reference voltage (TP_REF), and improving ground access to reduce noise. These revisions also introduce a mandatory hardware-firmware handshake at TP_04 to enhance security during JTAG access, improving data reliability during high-frequency testing.

Here’s a structured technical summary in paper-like format based on available service documentation and repair community knowledge.

Part 4: The Anatomy of the JMMAL10 Test Point

Crucial Warning: Opening your phone voids warranty and risks permanent physical damage. Proceed at your own risk.

Here is the exact location for the JMMAL10 Test Point:

Remove the Back Cover: Use a heat gun or iOpener to soften the adhesive. The back cover is plastic but glued tightly.
Remove Midframe Screws: Remove all Phillips screws holding the black plastic midframe.
Locate the Motherboard: The mainboard sits at the top left of the device (camera side).
Find the Shield/Test Points: Look for two tiny metallic dots labeled TP (Test Point) near the SIM card slot or close to the MediaTek CPU shield. On JMMAL10, they are usually:
- Point A (GND): A large, exposed copper area or a specific small dot.
- Point B (CLK/KCOLO): A smaller dot adjacent to it.

Visual Reference (Text Diagram):

[ Camera Modules ]
-------------------
|  CPU (Shielded)  |
|    o (TP1)       |  <-- Short these two
|    o (TP2/GND)   |
-------------------
[ SIM Slot ]

Since I cannot display an image, search "Redmi Note 10 JMMAL10 test point motherboard" for exact PCB markings. Look for metal dots not covered by the shield. The JMM-AL10 refers to the Honor 6C Pro

Why You Might Need This Procedure

You should consider performing the JMMAL10 test point UPD method if your device exhibits any of the following symptoms:

Hard Brick: The phone shows no signs of life. No vibration, no LED, no display, and it is not detected by the PC as a USB device (only appears as "Unknown Device" or "Huawei USB COM 1.0" with a yellow exclamation mark).
Fastboot/Recovery Loop: The phone boots only to the Huawei eRecovery or Fastboot mode but fails to install any update or boot normally.
FRP Lock (Factory Reset Protection): You cannot bypass the Google account verification after a factory reset, and standard methods fail.
Corrupted OEM Info: After an unofficial unlock or flash, the device shows "IMEI null" or "No Service."
Wrong Firmware Flashed: You accidentally flashed firmware for a different variant (e.g., JMMAL22 onto a JMMAL10).

2. Technical Background

In the context of the JMMAL10 control architecture (commonly found in PowerTech engine control units), a "Test Point" refers to specific memory addresses or physical pin-outs used to verify voltage, resistance, or data signals during quality assurance and field diagnostics.

An UPD (Update) in this context is a revision to the firmware or the diagnostic service tool configuration (Service Advisor) that changes how these points are read or interpreted.

3. Procedure for EDL Mode

Remove battery connector.
Locate TP1 and a GND point.
Short TP1 to GND using tweezers.
Keep shorted → connect USB cable to PC.
Release short after 2–3 seconds.
PC should detect Qualcomm HS-USB QDLoader 9008.

Technical Report: JMMAL10 Test Point Update (UPD)

Date: October 26, 2023 Subject: Analysis of JMMAL10 Test Point Update Implementation Component ID: JMMAL10 (Referencing Engine/Electronic Control Module Context)

4. Expected Outcome

Device stays black screen (no display).
Device Manager shows Qualcomm 9008 under Ports.
Service tool can write bootloader (aboot.mbn, sbl1.mbn) or full firmware.

JMMAL10 Test Point UPD

JMMAL10 is a compact test point update (UPD) specification used in embedded-system diagnostics and manufacturing validation. A JMMAL10 UPD package typically contains the following elements:

Identifier: Unique test-point name (e.g., JMMAL10) tied to a specific PCB net or module.
Purpose: Short description of why the test point exists (signal monitoring, programming access, power verification, ground reference).
Location: PCB coordinates or reference designator (silkscreen-marked near connectors or components).
Signal Type: Digital (UART, I2C, SPI), analog (ADC input), power rail (VCC, VSS), or test trigger.
Expected Levels: Voltage ranges and logic thresholds for pass/fail (e.g., 0 V = low, 3.3 V ±5% = high).
Test Procedure: Step-by-step actions for technicians or automated test equipment (ATE), including probe method, required fixtures, and measurement equipment settings.
Measurement Points: Exact pad or via to probe; recommended probe tip type and contact force.
Safety & ESD: Handling precautions, allowable current, and any isolation needed during live probing.
Failure Modes: Common faults detected at JMMAL10 (open circuit, short to ground, noisy signal) and suggested troubleshooting steps.
Firmware/Protocol Notes: If the point carries serial data, include baud rate, packet structure, and timing constraints.
Revision History: UPD version, date, and author to track changes across PCB revisions.

Example short UPD entry:

Identifier: JMMAL10
Purpose: Monitor 3.3 V microcontroller I/O rail
Location: Board coordinate B4, near U3 pin 12
Signal Type: Power rail (VCC)
Expected Levels: 3.3 V ±5% under nominal load
Test Procedure: With board powered, place multimeter probe on JMMAL10 pad, measure voltage; record reading. If <3.0 V, remove power and check regulator U5 and associated capacitors C12/C13.
Safety: Observe ESD precautions; max probe current 50 mA.

Use this structure to document or update any test point named JMMAL10 in your test plan or manufacturing documentation.

Disclaimer: This article is for educational purposes only. Performing test point procedures can void warranties, damage hardware, or brick your device. Proceed at your own risk.

Part 2: What does "UPD" mean in this context?

In the command jmmal10 test point upd, "UPD" stands for Update. Specifically, it refers to the firmware file you will flash once the test point is successful.

Common UPD Files used for JMMAL10:

Stock Fastboot ROM (tgz/tar.gz): Flashed via Mi Flash Tool (requires EDL authorization, which is hard to get).
SP Flash Tool ROM (scatter-based): Flashed via SP Flash Tool. This is the most common method after using the test point.
Auth Bypass UPD: A patched DA (Download Agent) file that bypasses Xiaomi's authentication.

Note: Using the test point without an authorized account is only possible with "MTK Bypass" or "SP Flash Tool with DA file."