Pioneer VSX-94TXH Service Manual page 47

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HDMI section
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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
Is the voltage
TE 4.4 V?
L 13942296513
Yes
L1101
Is the voltage
3.3 V?
(Func : HDMI1 or
HDMI2)
Yes
L1151
Is the voltage
3.3 V?
(Func : HDMI3 or
HDMI4)
Yes
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*(94TXH/92TXH)
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+5E0
VSX-94TXH only
No
Check D1101.
Replace D1101.
5V(HDMI IN2/HDMI IN1) *
V+5E1
No
Check D1102.
Replace D1102.
5V(HDMI IN3/HDMI IN2) *
V+5E2
No
Check D1151.
Replace D1151.
5V(HDMI IN4/HDMI IN3) *
V+5E3
No
Check D1152.
Replace D1152.
3.3 V(Cable EQ 1)
C1
VSX-94TXH only
No
Check L1101,Q1103 and
the peripheries.
No
Replace L1101,Q1103
or the peripheries.
3.3 V(Cable EQ 2)
C2
No
Check L1151,Q1153 and
the peripheries.
No
Replace L1151,Q1153
or the peripheries.
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X101
Is oscillation
of 27 MHz
output?
Yes
Step 3-2 : Reset
R125
No
Is the voltage
"H" (3.3 V)?
Yes
R303
No
Is the voltage
"H" (3.3 V)?
Yes
No
Step 3-3: Hot Plug Detect
Q1101 (Pin B)
Q Q
3 6 7 1 3 1 5
No
Is the voltage
"L" (0 V)?
Yes
JA1101 (Pin 19)
Is the voltage
"H" (5 V)?
Yes
Q1102 (Pin B)
Is the voltage
"L" (0 V)?
Yes
A
co
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VSX-94TXH
7
9 4 2 8
X'TAL(HDMI Rx)
C8
Check the soldering of
No
IC101. Check the
peripheries of X101.
Replace.
RXRST
R1
No
Check the parts and
patterns in the path.
Replace IC501 or IC502.
TXRST
R2
No
Check the parts and
patterns in the path.
Replace IC501 or IC502.
* When connected the source
equipment to IN1/-.
HPDET0(HDMI IN1/--) *
0 5 E1 8 2 9 9 4 2 8
VSX-94TXH only
No
Check the patterns in the path.
Replace IC501.
HPD(HDMI IN1/--) *
E2
VSX-94TXH only
No Check the patterns in the path.
Check Q1101,R1101.
Replace Q1101 or R1101.
* When connected the source
equipment to IN2/1.
HPDET1(HDMI IN2/HDMI IN1) *
E3
No
Check the patterns in the path.
Replace IC501.
m
7
8
9 9
A
No
B
No
No
C
9 9
No
D
No
E
No
F
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