31
VSX-1020-K
5
6
7
8
5
6
7
8
A
B
C
D
E
F
To Step 2
Step 1: Power supply
C
N
1900 (Pins 1, 2)
Is the
voltage of around
13
V
input
?
N
o
Yes
V
+13_U
N
Check IC1900 and its
peripheral circuits.
<When no image is displayed after the unit is turned on, the HDMI LED on the front panel lights, and the HDMI or analog signal is input.>
• If conversion between 480i and 480p is not possible, it is most likely that IC800 is in failure. Check its peripheral circuits.
• Assume that the LCRs are neither in poor connection nor damaged.
• Analog video Convert (Ex.: S
→
COMPO
N
E
N
T) is satisfied by diagnosing the input and output.
• Although diagnosis is assumed to be performed from Side A, the wiring numbers on Side B are also described in the flowchart.
• This shows failure analysis for the HDMI & D
V
C Part of the D-MAI
N
Assy.
• The confirmation of peripheral circuits means mainly a power supply of IC, a sync signal, a existence of the input/output signal,
a conduction check and the appearance check of the bridges.
HDMI & DVC Block Troubleshooting
Check the MAI
N
Assy.
L1902
Is the
voltage of 5
V
output?
N
o
N
G
Yes
V
+5_DDD
Check Q1900 and its periphery.
(Pins 1,2,5,6: around 9
V
Pin 3: around 6
V
Square wave)
A
B
Check IC1900 and its
peripheral circuits.
R1916
Is the
voltage of around
5
V
output?
N
o
N
G
Yes
V
+5_HD
Check Q1900 and its periphery.
(Pins 1,2,5,6: around 9
V
Pin 3: around 6
V
Square wave)
C
IC1100 (Pin 5) (side B)
Is the
voltage of around
3.3
V
output
?
N
o
Yes
V
+3R3_EM_
V
Check IC1100 and its peripheral
circuits.
Check IC1101 and its peripheral
circuits.
Check IC1102 and its peripheral
circuits.
Check IC1104 and its peripheral
circuits.
IC1101 (Pin 5) (side B)
Is the
voltage of around
3.3
V
output
?
N
o
Yes
V
+3R3_EM_D
IC1102 (Pin 5) (side B)
Is the
voltage of around
2.5
V
output
?
N
o
Yes
V
+2R5_EM
IC1104 (Pin 5) (side B)
Is the
voltage of around
1
V
output
?
N
o
Yes
V
+1_EM
Check IC1930 and its
peripheral circuits.
L1931
Is the
voltage of around
3.3
V
output
?
N
o
N
G
Yes
V
+3R3_HHH
Check Q1930 and its periphery.
(Pin 1: around 7.5
V
Square wave
Pins 5,6: around 16.5
V
)
D
Check IC1930 and its
peripheral circuits.
L1932
Is the
voltage of around
1.8
V
output
?
N
o
N
G
Yes
V
+1R8_HHH
Check Q1931 and its periphery.
(Pin 1: around 5.5
V
Square wave
Pins 7,8: around 16.5
V
)
D
A
• The parts marked like in the following chart are located in "Check Points of the D-MAI
N
Assy."
Summary of Contents for VSX-1020-K
Page 7: ...7 VSX 1020 K 5 6 7 8 5 6 7 8 A B C D E F 2 2 PANEL FACILITIES Front panel ...
Page 8: ...8 VSX 1020 K 1 2 3 4 A B C D E F 1 2 3 4 Display ...
Page 9: ...9 VSX 1020 K 5 6 7 8 5 6 7 8 A B C D E F Remote control ...
Page 10: ...10 VSX 1020 K 1 2 3 4 A B C D E F 1 2 3 4 Rear panel ...
Page 16: ...16 VSX 1020 K 1 2 3 4 A B C D E F 1 2 3 4 4 2 DIGITAL AUDIO BLOCK DIAGRAM N D MAIN ASSY ...
Page 17: ...17 VSX 1020 K 5 6 7 8 5 6 7 8 A B C D E F ...
Page 19: ...19 VSX 1020 K 5 6 7 8 5 6 7 8 A B C D E F 4 4 DIGITAL VIDEO BLOCK DIAGRAM N D MAIN ASSY ...
Page 21: ...21 VSX 1020 K 5 6 7 8 5 6 7 8 A B C D E F C COMPOSITE ASSY E F VIDEO ASSY ...
Page 24: ...24 VSX 1020 K 1 2 3 4 A B C D E F 1 2 3 4 ...
Page 67: ...67 VSX 1020 K 5 6 7 8 5 6 7 8 A B C D E F G K CP3002 2 259 N 5 12 CN1601 ...
Page 112: ...112 VSX 1020 K 1 2 3 4 A B C D E F 1 2 3 4 J J AMP ASSY SIDE B CP11 CP10 ...
Page 113: ...113 VSX 1020 K 5 6 7 8 5 6 7 8 A B C D E F J SIDE B CN5001 CP11 ...
