39
VSX-LX52
5
6
7
8
5
6
7
8
A
B
C
D
E
F
Step 5: COMPONENT IN
Step 5-1: HDMI OUT (more than 480p)
CN1254 (Pin 5)
Is the voltage
"H" ?
No
Yes
COMPDET
Check CN1254 and diagnose
the COMPONENT Assy.
P
CN1254 (Pins 13,15,17)
Is there a
analog video
signal? *
No
Yes
Y_IN, CB_IN, CR_IN
* Diagnose it from the COMPONENT Assy side.
Check CN1254 and diagnose
the COMPONENT Assy.
Q1151,Q1155,Q1157
(Emitter), (side B)
Are the
signals output at
emitter?
No
Yes
SG_A, SG_B, SG_C
Check Q1151, Q1155, Q1157 and
its peripheral circuits.
IC1701 (Pins 2,5-8,12-19,
25-28,59-62,64),R1706
(side B)
Are the
signals output?
No
Q** RXHSYNC, RXVSYNC, VOCLK
Check IC1701 and its peripheral
circuits.
Yes
IC1807,IC1808(side B),
IC1809,IC1810(side B),
IC1811(side B)
(Pins 11-17)
Are the
signals output?
No
P** HSYNC, VSYNC, PDE, PDCLK
Check IC1807-IC1811 and its
peripheral circuits.
Yes
To Step 5-2
B
Step 4-3: HDMI IN 4 (Front IN)
To Step 5
CN1601 (Pin 20)
Is the voltage
around 5 V ?
No
NG
NG
NG
Yes
V+5_f
Check the soldering of CN1601.
Diagnose the FRONT HDMI &
USB Assy.
NG
Diagnose the FRONT HDMI &
USB Assy.
NG
Diagnose the FRONT HDMI &
USB Assy.
Check IC1601 and its peripheral
circuits.
NG
Check IC1501 and its peripheral
circuits.
Check the source equipment.
Is the voltage
around 5 V ?
No
Check the soldering of CN1601.
CN1601 (Pins 14,15)
Does
a signal output in
constant period
?
No
Yes
Yes
DDC (SDA/SCL)
CN1601 (Pin 16)
Hot plug detect
Check the soldering of CN1601.
IC1601 (Pins 25,26,
28,29,31,32,34,35)
Is there
0.5Vp-p in CLK
and DATA?
No
Yes
TMDS signal
IC1601 (Pins 48,49,51,
52,54,55,57,58)
TMDS signal
Check IC1601 and its peripheral
circuits.
Is there
0.5Vp-p in CLK
and DATA?
No
Yes
Check the soldering between
IC1601 and CN1601.
CN1601
(Pins 2,3,5,6,8,9,11,12)
TMDS signal
Is there
0.5Vp-p in CLK
and DATA?
No
Yes
Check the soldering of CN1601.
N
N
O
A
Whole
diagram
Analog IN, HDMI OUT