Specifications

23
9-2. Power Check Procedure.
Check for AC
Cord or SMPS
Check for AC
Check for AC
Cord or SMPS
Cord or SMPS
Power circuit
normal?
Power circuit
Power circuit
normal?
normal?
Check 14.318
(Y3) oscillator
Check 14.318
Check 14.318
(Y3) oscillator
(Y3) oscillator
Reset PW218
Reset switch
Reset PW218
Reset PW218
Reset switch
Reset switch
I2CBus signal
normal?
I2CBus signal
I2CBus signal
normal?
normal?
Re-connect AC-Cord
or SMPS
Re
Re
-
-
connect AC
connect AC
-
-
Cord
Cord
or SMPS
or SMPS
Check regulators
(U61, U63, U64, U74)
Check regulators
Check regulators
(U61, U63, U64, U74)
(U61, U63, U64, U74)
Check Crystal or
PW218
Check Crystal or
Check Crystal or
PW218
PW218
Check Reset signal
(R307)
Check Reset signal
Check Reset signal
(R307)
(R307)
Check
peripheral circuit
Check con26, 27, 28
Check
Check
peripheral circuit
peripheral circuit
Check con26, 27, 28
Check con26, 27, 28
No
Problem?
No
No
Problem?
Problem?
Yes
Yes
Yes
Yes
No
No
No
No
No
END
END
END
START
START
START
NO
YES
Replace SMPS
Replace SMPS
Replace SMPS
Check for AC
Cord or SMPS
Check for AC
Check for AC
Cord or SMPS
Cord or SMPS
Power circuit
normal?
Power circuit
Power circuit
normal?
normal?
Check 14.318
(Y3) oscillator
Check 14.318
Check 14.318
(Y3) oscillator
(Y3) oscillator
Reset PW218
Reset switch
Reset PW218
Reset PW218
Reset switch
Reset switch
I2CBus signal
normal?
I2CBus signal
I2CBus signal
normal?
normal?
Re-connect AC-Cord
or SMPS
Re
Re
-
-
connect AC
connect AC
-
-
Cord
Cord
or SMPS
or SMPS
Check regulators
(U61, U63, U64, U74)
Check regulators
Check regulators
(U61, U63, U64, U74)
(U61, U63, U64, U74)
Check Crystal or
PW218
Check Crystal or
Check Crystal or
PW218
PW218
Check Reset signal
(R307)
Check Reset signal
Check Reset signal
(R307)
(R307)
Check
peripheral circuit
Check con26, 27, 28
Check
Check
peripheral circuit
peripheral circuit
Check con26, 27, 28
Check con26, 27, 28
No
Problem?
No
No
Problem?
Problem?
Yes
Yes
Yes
Yes
No
No
No
No
No
END
END
END
START
START
START
NO
YES
Replace SMPS
Replace SMPS
Replace SMPS