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7-3. System Not Initialized
START
Check Vcc ≥ 4.75V
P9-1 (+5)
P9-2 (GND5)
N
See Section 7-2-2
Samsung Electronics
Y
Check U33Pin 3
= "High"
Y
Step motor
driving
N
Check
30 MHz
Clock U1-151
Y
Replace U28 ROM
OK ?
N
Replace U1
Jupiter-2 IC
OK ?
N
A
Replace U33
N
Voltage detector IC
Check
Y
P4 Harness or
OPE PBA
OK
Replace U1
Jupiter-2
Check
NG
30 MHz
Clock U1-131
OK
Y
END
Y
END
Troubleshooting
Replace P4 Harness
NG
or OPE PBA
NG
Replace X1 XTAL
7-5
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