Pioneer VSX-820-K Service Manual page 41

5
QQ
3 7 63 1515 0
[4] BT (BlueTooth) TROUBLESHOOTING
Step 0: Preliminary confirmation
Confirm the following items before checking.
Do screws of
Plate_Screw securely
tighten ?
Yes
To STEP 1
Step 1: BT_DET
CP501 (pin 2)
Is the voltage
0 V?
Yes
To STEP 2
Step 2: Power supply
CP501 (pin 4)
TE
L 13942296513
Is
the voltage
5 V ?
Yes
IC500 (pin 1)
Is
the voltage of
5 V input?
Yes
IC500 (pin 6)
Is
the voltage
5 V output?
Yes
www
.
5
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6
No
Tighten screws securely.
BT_DET
No
Check the patterns in
the path and MAIN Assy.
5 V input
Is there any
No No
loose connection
CN501 of MAIN
Assy?
Check the patterns
Yes
inthe path and
MAIN Assy.
To STEP 2
(to chassis)
No
Check the patterns in
the path.
5 V output (to chassis)
Is
No 0 V
IC500-pin 3
(EN) 3.3 V?
Check the patterns
in the path and
3.3 V
replace IC500.
Is
3.3 V
Q500-base
(BT_ON/OFF/CE)
0 V?
Check the patterns
x ao u163
0 V
in the path and
y
replace Q500.
i
Check the MAIN Assy
and CP501 (8P).
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7
2 9
8
CN500 (pin 17)
Is the voltage
5 V?
Yes
To STEP 3
Step 3: BT_DET
CP501 (pin 2)
Is
the voltage
0.7 V to 12 V
?
Yes
To STEP 4
Q Q
3 6 7 1 3 1 5
Step 4: Communicaion
CP501 (pins 6,7) BT_RXD, BT_TXD
Do
BT_RXD and
BT_TXD commu-
nicate with the main
UCOM?
Yes
To STEP 5
Step 5: Audio Out check
CP502 (pins 1,4)
Is
there a audio
signal?
Yes
Check the INPUT Assy.
co
.
VSX-820-K
7
8
9 4 2 8
5 V input
No
Check the patterns
in the path.
BT_DET
No
Check the patterns in
the path and MAIN Assy.
0 5 8 2 9 9 4 2 8
No BT_RXD and BT_TXD should
be high during operation.
Check the patterns in the path
and MAIN Assy.
No
Check the parts in the path.
m
8
9 9
A
B
C
9 9
D
E
F
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