Pioneer VSX-LX52 Service Manual page 37

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