Flash Memory Circuit - Huawei G510 Maintenance Manual

Troubleshooting
Fault symptom: The G510 fails to be powered on or frequently breaks down. Checks on the
32.768 kHz oscillator show that X301 and U3101 have no output or output unstable
frequencies.
Handling: Replace X301 or U3101. If the problem persists, replace the PM8029.
Circuit Symbols
Signal Symbol
XTAL32K
_OUT
XTAL32K_IN
VREG_TCXO
TRK_LO_ADJ
RTR6285_TCXO 19.2 MHz clock output
TCXO

9.2.4 Flash Memory Circuit

Circuit Diagram
Figure 9-13 shows the circuit diagrams of the flash memory.
2013-01-28
G510 Maintenance Manual V1.0
Description
Output end for the 32.768
kHz main clock signals
Input end for the 32.768 kHz
main clock signals
19.2 MHz oscillator power
Control signal of the 19.2
MHz output frequency
19.2 MHz clock output
Huawei Confidential
Reference Measurement or
Waveform
2.85 V
None
INTERNAL
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