Test the diode values of all MIPI lines leading to the CPU; an open loop (OL) indicates a broken trace or cracked CPU solder joint.
Understanding the internal layout of a smartphone is essential for hardware repairs, component level troubleshooting, and microsoldering. For technicians working on the Vivo Y93, having access to an accurate schematic diagram and board layout (PCB map) can mean the difference between a successful repair and a permanently dead device.
Look at the pins of the connector. Identify power supply lines (marked with VREG or VDD ), data lines ( MIPI ), and control lines ( I2C_SDA , I2C_SCL , RESET ). Take Multimeter Measurements: vivo y93 schematic diagram download new
When a Vivo Y93 refuses to turn on and draws zero or irregular current on a DC power supply, the issue usually lies within the power rails.
Locate broken traces hidden beneath the board layers using continuity test points. Test the diode values of all MIPI lines
When sourcing modern, updated schematic packets for the Vivo Y93, utilizing structured servicing software is highly recommended over searching for loose internet files.
Measure the buck regulator coils surrounding the main PMIC. If voltages like 1.8V or 1.1V are missing, the PMIC may be faulty or held in a reset state due to a shorted capacitor. Look at the pins of the connector
| Component | Reference IC | Key Test Points in Diagram | | :--- | :--- | :--- | | | Qualcomm SDM439 | C1102 (VDD_CORE: 0.9V), C1205 (VDD_MEM: 1.1V) | | Charging IC | Texas Instruments BQ25601 | VBUS (5V-0V), PMID, BAT_SNS | | Display | FT5446DQS (Touch) | TP_RST, TP_INT, I2C_SDA (TP2002) | | Audio | WCD9370 | HPH_L, HPH_R, MIC_BIAS |