Pioneer SX-LX70SW Service Manual page 21

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HDMI section
Step 3-1: Power supply, CLK
IC1051 (Pin 3)
Is the voltage
5 V?
Yes
Is the voltage
4.4 V?
Yes
Is the voltage
4.4 V?
Yes
Is the voltage
4.4 V?
Yes
TE
L 13942296513
L1151
Is the voltage
3.3 V?
(Func : HDMI3 or
HDMI4)
Yes
X101
Is oscillation
of 27 MHz
output?
Yes
Step 3-2 : Reset
IC101 (Pin 100)
Is the voltage
www
"H" (3.3 V)?
Yes
.
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5 V(HDMI OUT)
V+5HD
Check the soldering of IC1051 and
No
the peripheries of IC1051.
If soldering has not been done
correctly, replace IC1051.
5V(HDMI IN1)
V+5E1
No
Check D1102.
Replace D1102.
5V(HDMI IN2)
V+5E2
No
Check D1151.
Replace D1151.
5V(HDMI IN3)
V+5E3
No
Check D1152.
Replace D1152.
3.3 V(Cable EQ 2)
C2
No
Check L1151,Q1153 and
the peripheries.
No
Replace L1151,Q1153
or the peripheries.
X'TAL(HDMI Rx)
C8
Check the soldering of
No
IC101. Check the
peripheries of X101.
No
Replace.
RXRST
C9
No
Check the parts and
patterns in the path.
No
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Replace IC501 or IC502.
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IC301 (Pin 25)
Is the voltage
"H" (3.3 V)?
Yes
Step 3-3: Hot Plug Detect
Q1102 (Pin B)
No
Is the voltage
"L" (0 V)?
Yes
No
Q1102 (Pin C)
Is the voltage
"H" (5 V)?
No
Yes
Q Q
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Q1151 (Pin B)
Is the voltage
"L" (0 V)?
Yes
Q1151 (Pin C)
Is the voltage
"H" (5 V)?
Yes
Q1152 (Pin B)
Is the voltage
"L" (0 V)?
Yes
co
A
.
SX-LX70SW
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9 4 2 8
TXRST
C10
No
Check the parts and
patterns in the path.
Replace IC501 or IC502.
* When connected the source
equipment to IN1.
HPDET1(HDMI IN1)
E3
No
Check the patterns in the path.
Replace IC501.
HPD(HDMI IN1)
E4
Check the patterns in the path.
Check Q1102,R1102.
Replace Q1102 or R1102.
0 5 8 2 9 9 4 2 8
* When connected the source
equipment to IN2.
HPDET2(HDMI IN2)
E5
No
Check the patterns in the path.
Replace IC501.
HPD(HDMI IN2)
E6
No
Check the patterns in the path.
Check Q1151,R1151.
Replace Q1151 or R1151.
* When connected the source
equipment to IN3.
HPDET3(HDMI IN3)
E7
No
Check the patterns in the path.
Replace IC501.
m
7
8
9 9
A
No
B
No
C
No
9 9
No
D
No
E
No
F
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