Troubleshooting - Pioneer VSX-84TXSi Service Manual

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QQ
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1394 Troubleshooting

A
• It is assumed that there is no loose connection or damage in the LCRs.
• There must not be an abnormality in pattern.
• The parts marked like
Step 1: Connections
CN1001, CN1002
Is soldering of
the connectors
B
OK?
Yes
To Step 2
C
Step 2: Power supply
TE
L 13942296513
5V input
CN1001 (Pin 4)
No
Is the voltage
5V?
Yes
D
5V
L1
No
Is the voltage
5V?
Yes
C2 (+ side) 3.3V
No
Is the voltage
E
3.3V?
Yes
2.5V
C428 (+ side)
No
Is the voltage
www
2.5V?
Yes
To Step 3
F
60
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2
V+5
in the following chart are located in "HDMI & 1394 Assy Check Points".
A1
A2
No
Solder the connectors
correctly.
V+5IN
Check the INTERFACE or
DIGITAL MOTHER ASSY
Q1
Check the soldering of R1027,R1028.
If soldering has not been done
correctly, replace R1027,R1028.
V+3D
Check the soldering of IC1.
If soldering has not been done
correctly, replace IC1.
V+2D
Check the soldering of IC410.
If soldering has not been done
correctly, replace IC410.
x ao
y
. i
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8
Step 3: Operation of the Master Clock
X101
Is oscillation
of 6.14MHz
output?
Yes
X201
Is oscillation
of 24.576MHz
output?
Yes
To Step 4
Step 4: Operation of the Master External I/F
Q Q
3 6 7
JA201
Do signals
(approx. 0.5 Vp-p)
run in all the
lines?
Yes
JA202
Do signals
(approx. 0.5 Vp-p)
run in all the
lines?
Yes
To Step 5
u163
VSX-84TXSi
3
4
2 9 9 4
Microcomputer clock
R1
Check the soldering of X101 or
No
IC101. If soldering has not been
done correctly, replace X101 or
IC101.
Mercury clock
R2
Check the soldering of X201.
No
If soldering has not been done
correctly, replace X201.
1 3 1 5 0 5 8 2 9
Connection 1
S1
Check the soldering of JA201.
No
If soldering has not been done
correctly, replace JA201.
Connection 2
S2
Check the soldering of JA202.
No
If soldering has not been done
correctly, replace JA202.
m
co
.
4
2 8
9 9
9 4 2 8 9 9