Dc Distribution (V2_2.775V) Test - Motorola MTH500 Service Manual

68P02963C70-O

DC Distribution (V2_2.775V) Test

Use this test on a unit with the following symptoms: no power, no V2_2.775V, V1_1.875V,
V3_2.775V, VREF1_2.775V, VREF2_2.775V.
Note: The following are the DC power distribution voltages with their correct values and ap-
propriate location to check the voltages:
• Fused_B+ (3.6 Vdc) @ F600
• Filt_B+ (3.6 Vdc) @ C640
• V1_1.875V (1.875 Vdc) @ C611
• V2_2.775V (2.775 Vdc) @ C610, C613, C657
• V3_2.775V (2.775 Vdc) @ C609, C658, C659
• VREF1_2.775V (2.775 Vdc) @ C628
• VREF2_2.775V (2.775 Vdc) @ C612, C660, C661
• V4_2.775V (2.775 Vdc) @ C625, C644, C647
• VSIM1 (3 Vdc) @ C653
• 5V_RF (5 Vdc) @ C615, C651
• PWM2_1.8V (1.8 Vdc) @ C624, C648
• PWM1_5.6V (5.6 Vdc) @ C623
Troubleshooting
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