Pioneer SC-LX82 - Page 37

37
SC-LX82
5
6 7 8
5
6 7 8
A
B
C
D
E
F
IC2309 (Pin 2)
1st Block 1V
Replace IC2309.
Is the voltage
4.2 V-4.5 V
?
No
No
The output and GND may be short-
circuited. Check the path between
them.
Ye s
Ye s
Is IC2309
abnormally hot?
A
I
J
Check the parts and patterns
in the path.
IC2301 (Pin 1, etc.)
1st DSP 1V
Is the voltage
1 V?
No
Ye s
L
Check the parts and patterns
in the path.
IC2309 (Pin 4)
Is the voltage
2.5 V?
No
Ye s
Replace IC2310.
No
The output and GND may be short-
circuited. Check the path between
them.
Ye s
Is IC2310
abnormally hot?
K
IC2310 (Pin 5)
Is the voltage
1 V?
No
Ye s
Check the parts and patterns
in the path.
IC2305 (Pin 20)
LATCH 2
Is the voltage
3.3 V?
No
Ye s
F
Check the parts and patterns
in the path.
IC2302 (Pins 12, 37)
FLASH ROM
Is the voltage
3.3 V?
No
Ye s
G
Check the parts and patterns
in the path.
IC2303 (Pin 1, etc.)
SDRAM
Is the voltage
3.3 V?
No
Ye s
H
IC2308 (Pin 5)
2nd Block 1.25V
Is the voltage
1.25 V?
No No
Ye s
Ye s
Is IC2308
abnormally hot?
O
IC2401 (Pin 8, etc.)
2nd DSP 1.25V
Is the voltage
1.25 V?
No
P
Check the parts and patterns
in the path.
Check the parts and patterns
in the path.
IC2401 (Pin 3, etc.)
2nd DSP 3.3V
Is the voltage
3.3 V?
No
Ye s
IC2501 (Pin 5)
OSC Block 3.3V
Is the voltage
3.3 V?
No No
Ye s
Ye s
Is IC2501
abnormally hot?
Q
X2501 (Pin 4)
24M OSC 3.3V
Is the voltage
3.3 V?
No
R
Check the parts and patterns
in the path.
Ye s
Ye s
M
To Step 3
Replace IC2308.
Replace IC2501.
The output and GND may be short-
circuited. Check the path between
them.
The output and GND may be short-
circuited. Check the path between
them.