Samsung YP-R1, Руководство по обслуживанию

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Samsung Electronics 4-1
Troubleshooting
4. Troubleshooting
4-1 Checkpoints by Error Mode
Oscilloscope Setting Values Normal Voltage 24MHz 32.768KHz
Voltage/DIV 800mV/DIV 400mV/DIV 400mV/DIV
TIME/DIV 100ms/DIV 100us/DIV 100ns/DIV
4-1-1 If there is no power
Check that the
firmware is upgraded.
(See 4-2 Upgrade Methods)
Charge the battery and
check that the power is on.
Yes
No
1
/
2
/
3
C316: 2.5V, C318: 1.2V, C303: 3.0V
Check the voltage.
No
No
No
6
/
7
Check CPU_RST - HIGH
R406 - LOW
4
/
5
Check that the clock on X403 and
X402 oscillates.
No
Faulty
Yes
Yes
Yes
Yes
If there is no power

See the waveform and
the image in Fig. 4-1.
A
B

See the waveform and
the image in Fig. 4-3.

See the waveform and
the image in Fig. 4-2.