37
VSX-LX52
5
6
7
8
5
6
7
8
A
B
C
D
E
F
Step 2: X'tal
Step 4: HDMI IN, HDMI OUT
To Step 3
Yes
IC803 (Pins 5, 7) (side B)
IC1302 (Pin 7)
No
Is there
a 27 MHz
output?
No
Is there
a 36.864 MHz
output?
Yes
E
To Step 4
CLK27EMMA CLK27AB1
XHDTX1RST
F
JA1602-JA1604 (Pin 18)
Step 4-1: IN 1,2,3/INBD 1,2
Is the voltage
around 5 V ?
No
Yes
+5V
Check the soldering of JA1602-
JA1604 and the source equipment
connected in JA1602-JA1604.
JA1602-JA1604 (Pin 19)
Is the voltage
around 5 V ?
No
Yes
Hot plug detect
Check IC1501 and its peripheral
circuits.
Check IC803 and its peripheral
circuits.
Step 3: RESET
Yes
R931 (side B)
No
Is the
voltage "H"
(around 3.3 V)
?
XEMRST
Check the soldering and parts of
the path.
Yes
R1851 (side B)
No
Is the
voltage "H"
(around 3.3 V)
?
XVSRST
Check the soldering and parts of
the path.
Yes
IC1300 (Pin 91)
No
Is the
voltage "H"
(around 3.3 V)
?
XGARST
Check the soldering and parts of
the path.
Yes
R1509
No
Is the
voltage "H"
(around 3.3 V)
?
Check the soldering and parts of
the path.
H1
G
Yes
R9018
No
Is the
voltage "H"
(around 3.3 V)
?
Check the soldering and parts of
the path.
XHDTX2RST
H2
Yes
R9118
No
Is the
voltage "H"
(around 3.3 V)
?
Check the soldering and parts of
the path.
Check IC1302 and its peripheral
circuits.
X1501 (Pins 1, 3)
No
Is there a
27 MHz input or
output?
Yes
F
Q
JA1602-JA1604 (Pins 15,16)
Does
a signal output in
constant period
?
No
Yes
DDC (SDA/SCL)
Check the soldering of JA1602-
JA1604.
JA1602-JA1604
(Pins 1,3,4,6,7,9,10,12)
Is there
0.5Vp-p in CLK
and DATA?
No
Yes
TMDS signal
Check the soldering of JA1602-
JA1604.
Check X1501 and IC1501
and its peripheral circuits.
IC1702 (Pin 7) (side B)
No
Is there
a 28.63636 MHz
output?
Yes
Check IC1702 and its peripheral
circuits.
R1270
No
Is there
a 48 MHz
signal?
Yes
Check IC1251 and its peripheral
circuits.
A