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1- 2. Abnormal initial operation (Normal +2.8V voltage source)
Service Manual Online Homepage: http://manual.kmip.net/ Email: web_manual@163.com ICQ: 343183
Service Manual Online Homepage: http://manual.kmip.net/ Email: web_manual@163.com ICQ: 343183
Press PWR button
PCM CLK applied to
U200 pin2?
Yes
TCXO CLK signal
applied outputted from
U200 pin4?
Yes
RAM_CS signal ouputted
from U201 Pin J2?
Yes
CHIP X8 CLK signal
ouputted from U202 Pin
A14?
Yes
LED on?
Yes
Normal initial display
on LCD?
Yes
END
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SCH- X359 F low Chart of Troubleshooting and Circuit Diagrams
No
Check VCTCXO Output.
No
Check U200 and its neighboring circuits.
No
Check MSM board U202
No
Check MSM board U202
No
Check the LED and its
neighboring circuits.
Replace if required
No
Check the LCD pins and its
neighboring circuits.
Replace if required
2- 3
Replace if required.
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