Denon S-302 Service Manual page 28

Q Q
3 7 6 3 1 5 1 5 0
(3) Check the Set-up process of B/E -COM
Check Power Supply Voltages.
1U-3808-1(MAIN UNIT) N.G
[IC101]:
+3.3V_D2,+2.0V_ESS O.K.?
O.K.
Check Clock waveform.
1U-3808-1(MAIN UNIT) N.G
[IC101]:49,105,116pin and
117pin.
27MHz(3.3V),O.K.?
O.K.
Check Reset signal.
1U-3808-1(MAIN UNIT) N.G
[IC101]:[BE_RST]24 pin.
"H"level O.K.?
O.K.
Check I C Signal.
1U-3808-1(MAIN UNIT)
[IC101]: N.G
T E
L 1 3 9 4 2 2 9 6 5 1 3
"H"level at 160pin and 161pin.
O.K.
1U-3808-1(MAIN UNIT)
Check Address,Data Bus between
[IC101],[1C102]and[IC103] N.G
O.K.
Check controll signal.
1U-3808-1(MAIN UNIT) N.G
[IC105]:[BE_ON]19 pin.
"H"level O.K.?
END
w w w
.
http://www.xiaoyu163.com
Check Soldering.
[IC305]
[IC111]
Check 27MHz(3.3V)at (1) Check Soldering. of X101.
4pin of IC109. N.G (2) Check Soldering. of IC109
O.K.
Check Soldering. Of
IC112,R202
Check Soldering.
IC108,R112
Check Soldering.
1U-3808-1(MAIN UNIT)
[IC104]
CX801
Check Soldering at Address,Data Bus,Control Signal.
1U-3808-1(MAIN UNIT)
[LD0-LD7],[LCS3,LOE]
Check Soldering.
IC105
x a o u 1 6 3
y
i
http://www.xiaoyu163.com
8 9
Q Q
3 7 6 3 1 5 1
c o
.
28
2 4 9 8 2
5 0 8 9 2 4 9 8 2
m
S-302
9 9
9 9