Name: MVME7100-0173
Price: 6666 CNY
Availability: InStock

Description

‌Emerson MVME7100-0173 VMEbus SBC – Diagnostic Protocol‌

‌1. Pre-Diagnostic Safety‌

Critical Precautions‌:

De-energize VME chassis and disconnect all I/O (EN 60204-1 compliance)
Verify board revision: ‌“0173”‌ denotes 1GB DDR2 RAM + Xilinx XC5VLX30T FPGA
Use ESD-safe workstation (ANSI/ESD S6.1)

‌2. Symptom-Based Troubleshooting‌

‌A. No Power/Status LEDs Dark‌

mermaidCopy Code

graph LR

A[Check Backplane Voltage] --> B{+5V Standby ≥4.85V?}

B -->|No| C[Test PSU: VME P1 pin A32/A33]

B -->|Yes| D[Measure VBAT: CR2032 ≥2.9V?]

D -->|Low| E[Replace CMOS battery]

D -->|OK| F[Reseat FPGA: Apply 30N force to heatsink]

‌B. Continuous POST Failure‌

‌LED Pattern‌	‌Diagnosis‌	‌Action‌
‌STATUS 1-3 Red‌	DDR2 ECC fault	Reseat DIMMs → Test with MemTest86+
‌STATUS 4 Red‌	FPGA config error	Reflash firmware via JTAG (Xilinx USB-II)
‌STATUS 5-8 Amber‌	PCIe link failure	Check slot keying (VME64x vs. VXS)

‌3. Advanced Diagnostics‌

‌Required Tools‌:

Emerson SmartStart Diagnostics v4.1+
Wind River Workbench (for VxWorks BSP debugging)

‌Procedure‌:

Connect RS-232 console (J12, 115200 8N1)
Interrupt boot: Press ‌‘‌ key at ‌“Hit ‘Enter’ to stop autoboot”‌
Run diagnostics:
bashCopy Code

=> emerson diag full
Check critical thresholds:
- Core temperature: ‌>85°C‌ = Check airflow (<3m/s invalidates UL/c-UL)
- +3.3V rail: ‌±5% tolerance mandatory‌

‌4. Common Failure Modes & Solutions‌

‌Issue‌	‌Root Cause‌	‌Resolution‌
Kernel panic during boot	Corrupted NOR flash (U18)	Reprogram firmware via TFTP: `tftpboot 200000 mv7100.bin`
VMEbus timeout errors	P0 connector pin corrosion	Clean with Stabilant 22® + reseat
Intermittent lockups	MPC8548E CPU PLL desync	Replace C283/C284 (0.1μF decoupling caps)
Missing Ethernet (eTSEC)	Marvell 88E1111 PHY fault	Check magnetics module L5 inductance (600Ω @100MHz)

‌5. Firmware Recovery‌

Set SBC to bootstrap mode:
- SW1.1 = ON, SW1.2 = OFF, SW1.3 = ON
Connect JTAG (J22):
textCopy Code

TCK: Pin 1 TDI: Pin 3 TDO: Pin 9 TMS: Pin 7
Program via Xilinx iMPACT:
textCopy Code

impact -batch -source flash_mvme7100.cmd

‌6. Critical Notes‌

‌DO NOT‌ hot-swap without VME64x R1 backplane
‌ESD Sensitivity‌: All components rated Class 1B (HBM 500V)
‌Component Lifetime‌:
- Electrolytic caps: Replace at 50,000 hrs (MTBF calc per MIL-HDBK-217F)
- Cooling fan: Mandatory replacement at 3 years (P/N AFB0312HA-AF00)

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