U8950 Maintenance Guide V1.0
10 Principles and Failure Analysis
2012-10-22
Huawei Proprietary and Confidential
61
Circuit Diagram Symbols in this Section
Signal Name
Function
Test Reference Value or
Oscillogram
XTAL32K
_OUT
Output from the 32.768 kHz
main clock
XTAL32K_IN
Input from the 32.768 kHz main
clock
VREG_TCXO
19.2 MHz oscillator power
supply
2.9 V
TRK_LO_ADJ
Control signal of the 19.2 MHz
output frequency
None
RTR6285_TCX
O
19.2 MHz clock output
TCXO
19.2 MHz clock output
10.1.4 Flash Memory Circuit
Circuit Block Diagram
