33
VSX-918V-K
5
6
7
8
5
6
7
8
A
B
C
D
E
F
Replace IC251.
Replace IC201.
Step
8
: DSP output (digital)
Step 7: ROM
Digital output when indicated each CH.
Replace IC201.
Yes
IC201 (Pin 5)
Center/LFE data
N
o
Is there
a data output?
Replace IC201.
Yes
IC201 (Pin 6)
Surround L/R data
N
o
Is there
a data output?
Replace IC201.
Yes
IC201 (Pin 7)
Front L/R data
N
o
Is there
a data output?
To Step
8
To Step 9
Is the
voltage output about
3.3
V
during the operation
mentioned
above?
IC251 (Pin 6)
SCK (Clock in)
IC251 (Pin 5)
SI (DATA in)
IC251 (Pin 2)
SO (DATA out)
IC251 (Pin 1)
CS#
Yes
Yes
IC201 (Pin 70)
BUSY
N
o
Replace IC201.
Is the
voltage output about
0
V
after the operation is
completed mentioned
above?
Yes
N
o
N
o
Is there
movement (0
V
⇔
3.3
V
) when turned the
MCACC on, and does
movement stop within
3 sec.?
(0
V
⇔
3.3
V
)
(0
V
⇔
3.3
V
)
(0
V
⇔
3.3
V
)
To Step 6
IC331
Do
convert 5
V
into
3
V
for input?
Replace IC331.
N
o
Yes
Check the path to pin 45 of IC201.
Replace IC201.
Step 6: X'tal
To Step 7
Replace IC261 or X261.
Yes
IC261 (Pin 2)
N
o
Is there
a 24.576 MHz
output?
Check the path to pin 30 of IC101.
Replace IC101.
Yes
IC261 (Pin 7)
N
o
Is there
a 24.576 MHz
output?
Yes
IC261 (Pin 5)
N
o
Is there
a 24.576 MHz
output?
Step 5: 5 V to 3 V conversion
