User Guide

TV out troubleshooting

Troubleshooting flow

Steps

1. Make sure the phone display is working.

2. Make sure TV out cable is plugged into both phone and TV set.

If no image is shown on TV, make sure it is selected in phone SW:

Tools→Setting→General→Enhancement→TV out (open)→TV system

→Select appropriate TV setting

3. Check TV out signal (R2485).

4. Check R2482 (should be 560 Ω), R2481 (should be 1500 Ω), C2470, C2471, C2472 and L2470.

5. Check switch EMI/EDS + AV connector (N2003, C2137, L2010, R2013, E2012).

6. Verify voltage over these capacitors:

C2481 (VIO) = 1.72 V - 1.92 V

C2480 (VTVOUT) = 1.44 V - 1.56 V

C2482 (PLLVDD) = 1.44 V - 1.56 V

C2484 (DACVCC) = 2.66 V - 2.86 V

7. Replace TV out ASIC (D2480).

8. Retest after each repair/replaced part.

RM-348; RM-349; RM-350

Baseband Troubleshooting

Issue 2 COMPANY CONFIDENTIAL Page 3 –15