Pioneer VSX-1016V-K Service Manual page 220

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