Pioneer VSX-1019AH-K Service Manual page 36

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QQ
3 7 63 1515 0
A
HDMI & DVC Block Troubleshooting
<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.
• 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 & DVC Block of the DIGITAL MAIN Assy.
A
• The parts marked like
Step 1: Power supply
CN1900 (Pins 1, 2)
B
Is the
No
voltage of around
13 V input
?
A
Yes
L1902
Is the
No
voltage of 5 V
output?
C
B
Yes
TE
L 13942296513
R1916
Is the
No
voltage of around
5 V output?
C
Yes
D
L1931
Is the
No
voltage of around
3.3 V output
?
D
Yes
E
L1932
Is the
No
voltage of around
1.8 V output
?
D
www
Yes
F
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in the following chart are located in "Check Points of the DIGITAL MAIN Assy."
V+13_UN
Check the REGULATOR Assy.
V+5_DDD
Check Q1900 and its periphery.
(Pins 1,2,5,6: around 9 V
Pin 3: around 6 V Square wave)
NG
Check IC1900 and its
peripheral circuits.
V+5_HD
Check Q1900 and its periphery.
(Pins 1,2,5,6: around 9 V
Pin 3: around 6 V Square wave)
NG
Check IC1900 and its
peripheral circuits.
V+3R3_HHH
Check Q1930 and its periphery.
(Pin 1: around 7.5 V Square wave
Pins 5,6: around 16.5 V)
NG
Check IC1930 and its
peripheral circuits.
V+1R8_HHH
Check Q1931 and its periphery.
(Pin 1: around 5.5 V Square wave
Pins 7,8: around 16.5 V)
NG
x ao
Check IC1930 and its
y
peripheral circuits.
. i
VSX-1019AH-K
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8
IC1100 (Pin 5) (side B)
Is the
voltage of around
3.3 V output
?
Yes
IC1101 (side B)
Is the
voltage of around
3.3 V output
?
Yes
IC1102 (side B)
Q Q
3 6 7 1 3
Is the
voltage of around
2.5 V output
?
Yes
IC1104 (side B)
Is the
voltage of around
1 V output
?
Yes
To Step 2
u163
.
3
4
2 9 9 4 2 8
V+3R3_EM_V
No Check IC1100 and its peripheral
circuits.
V+3R3_EM_D
No
Check IC1101 and its peripheral
circuits.
V+2R5_EM
1 5 0 5 8 2 9 9 4
No
Check IC1102 and its peripheral
circuits.
V+1_EM
No
Check IC1104 and its peripheral
circuits.
m
co
4
9 9
2 8 9 9