Pioneer SX-LX70SW Service Manual page 21

5
HDMI section
Step 3-1: Power supply, CLK
5 V(HDMI OUT)
IC1051 (Pin 3)
V+5HD
Check the soldering of IC1051 and
No
Is the voltage
the peripheries of IC1051.
5 V?
If soldering has not been done
correctly, replace IC1051.
Yes
5V(HDMI IN1)
V+5E1
No
Is the voltage
4.4 V?
Yes
5V(HDMI IN2)
V+5E2
No
Is the voltage
4.4 V?
Yes
5V(HDMI IN3)
V+5E3
No
Is the voltage
4.4 V?
Yes
3.3 V(Cable EQ 2)
L1151
C2
Is the voltage
3.3 V?
(Func : HDMI3 or
HDMI4)
Yes
X'TAL(HDMI Rx)
X101
C8
No
Is oscillation
of 27 MHz
output?
Yes
Step 3-2 : Reset
RXRST
IC101 (Pin 100)
C9
No
Is the voltage
"H" (3.3 V)?
Yes
5
6
Check D1102.
No
Replace D1102.
Check D1151.
No
Replace D1151.
Check D1152.
No
Replace D1152.
No
Check L1151,Q1153 and
the peripheries.
No
Replace L1151,Q1153
or the peripheries.
Check the soldering of
IC101. Check the
peripheries of X101.
No
Replace.
Check the parts and
patterns in the path.
No
Replace IC501 or IC502.
SX-LX70SW
6
7
TXRST
IC301 (Pin 25)
C10
No
Is the voltage
"H" (3.3 V)?
Yes
Step 3-3: Hot Plug Detect
* When connected the source
equipment to IN1.
HPDET1(HDMI IN1)
Q1102 (Pin B)
E3
No
Is the voltage
Check the patterns in the path.
"L" (0 V)?
Yes
HPD(HDMI IN1)
Q1102 (Pin C)
E4
Check the patterns in the path.
Is the voltage
"H" (5 V)?
Check Q1102,R1102.
Yes
* When connected the source
equipment to IN2.
HPDET2(HDMI IN2)
Q1151 (Pin B)
E5
No
Is the voltage
Check the patterns in the path.
"L" (0 V)?
Yes
HPD(HDMI IN2)
Q1151 (Pin C)
E6
No
Is the voltage Check the patterns in the path.
"H" (5 V)?
Check Q1151,R1151.
Yes
* When connected the source
equipment to IN3.
HPDET3(HDMI IN3)
Q1152 (Pin B)
E7
No
Is the voltage
Check the patterns in the path.
"L" (0 V)?
Yes
A
7
8
A
Check the parts and
patterns in the path.
No
Replace IC501 or IC502.
B
No
Replace IC501.
C
No
Replace Q1102 or R1102.
No D
Replace IC501.
No
Replace Q1151 or R1151.
E
No
Replace IC501.
F
21
8