50
SC-LX81
1
2
3
4
A
B
C
D
E
F
1
2
3
4
Step 6-1: Power supply
V+1R5HD
V+1R5HD
V+3R3HD
V+3R3HD
Is the voltage
1.5 V?
No
Check the L1702.
No
Replace IC1702 or L1702.
Check the IC1702.
No
Replace IC1702 or L1703.
Is the voltage
1.5 V?
No
Check the IC1902.
No
Replace IC1902 or L1902.
Is the voltage
2.5 V?
No
Check the IC1051.
No
Replace IC1051 or L1701.
Is the voltage
3.3 V?
No
Check the IC1051.
No
Replace IC1051 or L1701.
Is the voltage
3.3 V?
No
1.5 V (Scaler)
IC1701(Pin 143)
RSTSWB
Q2
Is the voltage
"H"(3.3 V)?
No
Check the CN1701 (Pin 6).
No
Diagnosis the D-MOTHER ASSY.
Check the CN1701 (Pin 7).
No
Diagnosis the D-MOTHER ASSY.
Check the CN1701 (Pin 8).
No
Diagnosis the D-MOTHER ASSY.
IC1701(Pin 114)
EMMA SCK
Q2
No
IC1701(Pin 113)
EMMA SI
Q2
No
J
GUI(EMMA) section
Does
a signal output in
constant period
(0 - 3.3 V)
?
Check the CN1701 (Pin 9).
No
Diagnosis the D-MOTHER ASSY.
No
Does
a signal output in
constant period
(0 - 3.3 V)
?
Does
a clock output in
constant period
(0 - 3.3 V)
?
Step 6-3: Control
IC1701(Pin 112)
IC1701(Pin 111)
EMMA SO
Q2
Yes
Check the CN1701 (Pin 10).
No
Diagnosis the D-MOTHER ASSY.
No
Does
a signal output in
constant period
(0 - 3.3 V)
?
Yes
EMMA REQI
Q2
IC1701(Pin 133)
Check the CN1701 (Pin 11).
No
Diagnosis the D-MOTHER ASSY.
No
Does
a signal output in
constant period
(0 - 3.3 V)
?
Yes
EMMA REQO
Q2
L1703
Yes
1.5 V (Scaler)
L1902
Yes
V+2R5DDR_EM
2.5 V (Scaler)
L1701
Yes
3.3 V (Scaler)
L1706
Yes
3.3 V (Scaler)
Yes
Check the X1701.
No
Replace X1701 or IC1703.
Step 6-2: X'tal, Reset
X1701
X'tal
Q1
No
Is oscillation
of 27.0 MHz
?
Yes
Yes
Yes
Yes
Yes
L1702