25
VSX-1020-K
5
6
7
8
5
6
7
8
A
B
C
D
E
F
5. DIAGNOSIS
5.1 DIAGNOSIS FLOWCHART
Step 1: MUTE pin
Replace IC301.
Replace D582.
To Step 2
To Step 3
Step 0: Preliminary confirmation
Confirm the following items before checking
Do
screws of
earth terminal (K
N
481)
securely tighten
?
Tighten screws securely.
Note:
If this section is not fixed,
the G
N
D for DSP module
may lifted from the chassis
and cause instable potential
and lead to product failures.
N
o
Yes
To Step 1
IC301 (Pin 84) (or R324)
Is the
voltage of output
signal 0
V
?
N
o
N
o
Yes
Replace IC582 (side B).
N
G
Replace IC581.
N
G
DSP1MUTE
V
+5_DDD1
Check the Q1900 and
its periphery block.
Check the C121, C114,
C509 and C459.
Check the C333.
IC581 (Pin 1)
Is the
voltage of around
5
V
input?
Is the
voltage of 3.3
V
output?
N
o
Yes
(to chassis)
V
+3R3_D
(to chassis)
D582 (Cathode)
Is the
voltage of around
2.7
V
output
?
N
o
Yes
IC581 (Pin 3)
N
o
Yes
Is the
voltage of 1
V
input?
C333 (+ side)
N
o
Yes
V
+1_DSPF
N
G
Check the C506 and C527.
Check the MAI
N
Assy.
Is the
voltage of 5
V
input?
C506 (+ side)
N
o
Yes
V
+5_DAC
N
G
Check the C606, C656, C706
and C756.
Replace Q551 (side B).
Is the
voltage of 5
V
input?
C606 (+ side)
N
o
Yes
V
+5_DACA
N
G
Check the C552.
Replace R552.
Is the
voltage of around
5
V
input?
C552 (+ side)
N
o
Yes
V
+5_DACD
Step 2: Power supply
Simplified diagnosis
Errors in the Audio Part of the D-MAI
N
Assy (those simply and roughly predictable by machine operation only)
• Sound abnormality in Delay
If sound abnormality does not occur in the Delay OFF state but occurs in the Delay O
N
state, it is most likely that a failure
has occurred in SDRAM (IC251) or LATCH (IC281, IC291) in the DSP Part.
•
N
o sound at analog signal input
If sound abnormality does not occur with digital signal input (COAX, OPT, etc.) but occurs only with analog signal input,
it is most likely that a failure has occurred in the AD converter (IC501).
•
N
o sound with the PQLS O
N
(normal sound with the PQLS OFF)
If no sound is output during CD playback with the PQLS O
N
, it is most likely that a failure has occurred in the crystal
oscillator (X361). (Diagnosis point A)
<If no sound is output in Multi-Channel-Signal Playback or Surround mode with the COAX, OPT, USB, and HDMI inputs>
• Assume that the LCRs are neither in poor connection nor damaged.
• Assume that diagnosis is performed from Side A.
• This shows failure analysis for the DSP Part of the D-MAI
N
Assy.
DSP Troubleshooting
Check the DSP and down
stream block. Go to step 6.
1
4
5
6
7
8
2
3
1
• The parts marked like in the following chart are located in "Check Points of the D-MAI
N
Assy."
Содержание VSX-1020-K
Страница 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 ...
Страница 8: ...8 VSX 1020 K 1 2 3 4 A B C D E F 1 2 3 4 Display ...
Страница 9: ...9 VSX 1020 K 5 6 7 8 5 6 7 8 A B C D E F Remote control ...
Страница 10: ...10 VSX 1020 K 1 2 3 4 A B C D E F 1 2 3 4 Rear panel ...
Страница 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 ...
Страница 17: ...17 VSX 1020 K 5 6 7 8 5 6 7 8 A B C D E F ...
Страница 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 ...
Страница 20: ...20 VSX 1020 K 1 2 3 4 A B C D E F 1 2 3 4 4 5 ANALOG VIDEO BLOCK DIAGRAM B COMPONENT ASSY E F VIDE ...
Страница 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 ...
Страница 23: ...23 VSX 1020 K 5 6 7 8 5 6 7 8 A B C D E F O MAIN ASSY J AMP ASSY L HEADPHONE ASSY G F HDMI ASSY K DISPLAY ASSY ...
Страница 24: ...24 VSX 1020 K 1 2 3 4 A B C D E F 1 2 3 4 ...
Страница 61: ...61 VSX 1020 K 5 6 7 8 5 6 7 8 A B C D E F A J CN5001 F CN7615 O JP4001 F CN7613 D CN3652 Audio Signal Route ...
Страница 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 ...
Страница 71: ...71 VSX 1020 K 5 6 7 8 5 6 7 8 A B C D E F M K M POWER SW ASSY 7028069222010 IL N 3 12 CN1405 O CN55 G CN3005 ...
Страница 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 ...
Страница 113: ...113 VSX 1020 K 5 6 7 8 5 6 7 8 A B C D E F J SIDE B CN5001 CP11 ...