47
YSP-4000/YSP-40D/HTY-7040
YSP-4000/YSP-40D/
HTY-7040
UART loop back test
iPAP (iPod accessory power) detec-
tion
iPDET (iPod installation to DOCK) de-
tection
OK
NG
High
Low
Low
High
Check item
Result
Display
11. DOCK CHECK (U, C, A models)
This menu is used to test the DOCK connector without the iPod itself.
After turning off the power, short between pins No. 14 (TX) and No. 18 (RX), between pins No. 1 (PWR) and No. 17
(ACCPOW) and between pins No. 4 (iPDET) and No. 8 (DGND).
Start the self-diagnostic function and select the menu.
The check result is displayed according to the following display specifications.
DOCK
All Y = “OK”
Others = “NG”
Y
N
Y
N
Y
N
Note) Be sure to return the shorted locations to their original state.
11.DOCK:NG
YNN
1
2
19
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
20
21
IC16 (INPUT P.C.B.) pin
no. 11 state
IC16 (INPUT P.C.B.) pin
no. 7 state
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