VSX-1016V-K
220
1
2
3
4
1
2
3
4
C
D
F
A
B
E
Step 3: Operation of USB Media control IC
Does the
crystal oscillator
at 12 MHz
?
Check the
MOTHER Assy.
Note:
Please confirm it with the USB memory connected for the content.
IC701 (pins 7,24,41,71,77,87,109,119)
USB Media control IC
12
Replace IC771.
Yes
Yes
Yes
Is pin 4
(CTL) of IC771
high?
Is
the voltage
5 V ?
No
Yes
Is
the voltage
1.8 V ?
Yes
Is pin 14
(CTL) of CN702
high?
No
No
Check the parts and
patterns in the path.
Check the parts and
patterns in the path.
No
CN701 (pin 1)
USB Bus power
14
Is
the voltage
5 V ?
Check the parts and
patterns in the path.
Power supply is OK.
To STEP 3
No
XRST must be high during operation.
Check the MOTHER Assy.
USCS and USCLK should be
high during operation.
Check the pattern in the path.
Check the MOTHER Assy.
Replace IC762, etc.
Check the parts and patterns in the path.
Replace X701, etc.
No
Fig. 1
IC771 (pin 1)
USB Power SW output
13
Yes
Yes
Is XRST
high?
No
Are
USCS and USCLK
high?
Yes
No
IC701 (pins 74,75)
USCS/USCLK (Refer to Fig. 1 and 2)
XIN/XOUT
A
B
IC701
IC953 (5 V
→
3 V)
CN702
XRST
pin 72
pin 3
pins 1,2
pin 5
USCS
pin 121
pin 11
pins 12,13
pin 9
HREQ
pin 122
pin 6
pins 4,5
pin 12
USDAI
pin 118
pin 8
pins 9,10
pin 10
Fig. 2
IC701
IC951 (3 V
→
5 V)
CN702
USCLK
pin 116
pins 4,5
pin 6
pin 7
USDAO
pin 115
pins 9,10
pin 8
pin 11
TREQ
pin 123
pins 12,13
pin 11
pin 13
Содержание Elite VSX-80TXV-S
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