Vdcdca (Vlow) Level; Vpa Level - Nokia RM-609 Service Manual

RM-609
Cellular RF troubleshooting

VDCDCA (Vlow) level

Check the VDCDCA level (1.5 V) at C7528.
The WCDMA transmitter has to be activated before the VDCDCA supply voltage can be measured. Follow the
instructions given in chapter 'Manual transmitter (TX) testing with Phoenix → 'WCDMA transmitter activation'.
Note: The VDCDCA signal is continuously on when WCDMA TX is activated.

VPA level

The GSM or WCDMA transmitter has to be activated before the VPA supply voltage can be measured. Follow
the instructions given in chapter 'Manual transmitter (TX) testing with Phoenix → GSM transmitter activation'
or 'WCDMA transmitter activation'.
Check the VPA voltage level at C7514.
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