58
VSX-LX51
1
2
3
4
A
B
C
D
E
F
1
2
3
4
Step 2: Check of oscillation
* Turn ON the power of product and check the power supply by USB iPod function.
* Make a confirmation with USB memory or iPod* connected.
* The iPod that can be used for this product is iPod 5G, iPod nano, iPod classic and iPod touch
(as of April 1, 2008).
IC801 (Pins 6,7)
X801(CF1/CF2)
9
Check the Pin 8 (USB XRST)
of CN701 (CN702).
Note :
USBRST3 is set to high during the operation.
Fig. 1
IC801
IC701 (5 V
→
3 V)
CN701
(CN702)
USBDAI
Pin 44
Pin 11
Pins 12,13
Pin 6
IC801
IC702 (3 V
→
5 V)
CN701
(CN702)
USBDAO
Pin 45
Pin 2
Pin 18
Pin 5
Check the peripheral circuit of X801.
Replace of X801.
Yes
Yes
Is
USBRST3
(Pin 2) high
(3.3V)?
No
Does the
oscillation waveform
at 12MHz
?
No
IC808 (Pins 2,3)
X881(XIN/XOUT)
10
Recheck the power supply
(3.3V) of IC808.
Note :
X801 oscillates when the power supply of IC808 is turned ON.
Yes
No
Does the
oscillation waveform
32.768MHz
?
Check of oscillation is OK
To step 3
Step 3: Check of operation of USB u-COM
IC801 (Pins 44,45)
Main u-COM communication (USBDAI, USBDAO)
11
USBDAO and USBDAI should be
set to High during the operation.
Replace of IC801 or main u-COM.
Yes
No
Check the power supply voltage of IC801.
Check the oscillation of X801.
Check the USBRST.
Replace of IC801.
Note :
When the usable USB memory or iPod is
connected, the waveform shown on right
side can be observed in D-/D+.
No
CN801 (Pins 7,8)
D+/D-
12
Yes
Can the
waveform shown in
Fig be observed
?
IC801 is OK.
To step 4.
Do the USBDAO
and USBDA perform
communication with
main u-COM?
Fig.
D+
D-
As it is USB2.0 (FS),
the P-P value is approximately 3 to 3.5V.
X: 1
μ
sec/div, Y: 2 V/div
Содержание VSX-1018AH-K
Страница 8: ...8 VSX LX51 1 2 3 4 A B C D E F 1 2 3 4 2 2 SPECIFICATIONS LX51 13 3 kg 1018AH ...
Страница 9: ...9 VSX LX51 5 6 7 8 5 6 7 8 A B C D E F 2 3 PANEL FACILITIES 1 Rear panel VSX LX51 ...
Страница 10: ...10 VSX LX51 1 2 3 4 A B C D E F 1 2 3 4 VSX LX51 2 Front panel ...
Страница 11: ...11 VSX LX51 5 6 7 8 5 6 7 8 A B C D E F 3 Display ...
Страница 12: ...12 VSX LX51 1 2 3 4 A B C D E F 1 2 3 4 4 Remote control AXD7518 VSX LX51 Only ...
Страница 13: ...13 VSX LX51 5 6 7 8 5 6 7 8 A B C D E F ...
Страница 75: ...75 VSX LX51 5 6 7 8 5 6 7 8 A B C D E F ...
Страница 82: ...82 VSX LX51 1 2 3 4 A B C D E F 1 2 3 4 9 4 POWER AMP SECTION S L K R I W Y X J N ...
Страница 132: ...132 VSX LX51 1 2 3 4 A B C D E F 1 2 3 4 ...