Other Potential Problems; Mobile Terminal Does Not Power Up; Shutdown After 32 Seconds; No Audio - Nokia 2366i Baseband Description And Troubleshooting

2366i (RM-155)
Baseband Description and Troubleshooting

Other Potential Problems

Mobile Terminal Does Not Power Up

• Check the baseband regulators – VR3, VIO, VFLASH1, VCORE dc/dc, PURX.
• Check VCTCXO 19.2MHz signal at the D2800 input.
• Check the power up sequence.
• Check Flash IC, flash bus signals, and voltage level.

Shutdown after 32 Seconds

• Check for the absence of 32KHz SleepCLK.
• Check for incorrect SleepX and PURX signal levels.
• Check if the ESN number was corrupted.

No Audio

• Check for bad contacts or damaged earpiece
• Check for bad connections at the microphone
• Check for broken or bad solder joint of transistors and audio ASIPs
• Verify the audio signal paths using baseband "audio test" component with
Phoenix

Keypad Malfunction

• Check for protective film left on the back of the key dome if a new one was
installed
• Check for corrosion on the keypad and keydome
• Check if the flash software was corrupted
• Check for a bad joint from the D2800 to the Z2400 interface
• Check for damage on the Z2400

No LCD Display

• Check for bad connections
• Check for a cracked or damaged display
• Probe test points for missing or incorrect signal levels
Page 26 Company Confidential
Nokia Customer Care
Issue 2 - February 2007