Denon S-102 Service Manual page 24

(2) Check the Set-up process of B/E μ-COM
Check Power Supply Voltages.
1U-3836-1(MAIN UNIT) N.G
・ [IC101]:
+3.3V_D2,+2.0V_ESS O.K.?
O.K.
Check Clock waveform.
1U-3836-1(MAIN UNIT) N.G
・ [IC101]:49,105,116pin and
117pin.
27MHz(3.3V),O.K.?
O.K.
Check Reset signal.
1U-3836-1(MAIN UNIT) N.G
・ [IC101]:[BE_RST]24 pin.
"H"level O.K.?
O.K.
Check I C Signal.
1U-3836-1(MAIN UNIT)
・ [IC101]:
N.G
"H"level at 160pin and 161pin.
O.K.
1U-3836-1(MAIN UNIT)
Check Address,Data Bus between
[IC101],[1C102]and[IC103] N.G
O.K.
Check controll signal.
1U-3836-1(MAIN UNIT) N.G
・ [IC105]:[BE_ON]19 pin.
"H"level O.K.?
END
Check Soldering.
・ [IC304]
・ [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
・ R202
Check Soldering.
・ IC301,R112
Check Soldering.
1U-3836-1(MAIN UNIT)
・ [IC104]
Check Soldering at Address,Data Bus,Control Signal.
1U-3836-1(MAIN UNIT)
・ [LD0-LD7],[LCS3,LOE]
Check Soldering.
・ IC105
(2) B/E μ-COM 立ち上がりチェック工程
電源電圧確認
1U-3836-1(MAIN UNIT)
・ [IC101]:
+3.3V_D2,+2.0V_ESS O.K.?
O.K.
ク ロッ クの 波形確 認
1U-3836-1(MAIN UNIT)
・ [IC101]:49,105,116pin and
117pin.
27MHz(3.3V),O.K.?
O.K.
RESET信号の確認
1U-3836-1(MAIN UNIT)
・ [IC101]:[BE_RST]24 pin.
"H"level O.K.?
O.K.
２
I C信号の確認
1U-3836-1(MAIN UNIT)
・ [IC101]:
"H"level at 160pin and 161pin.
O.K.
1U-3836-1(MAIN UNIT)
[IC101]と[1C102]と[IC103]間の
アド レス、 デー タバスの 確認
O.K.
制御信号の確認
1U-3836-1(MAIN UNIT)
・ [IC105]:[BE_ON]19 pin.
"H"level O.K.?
終了
24
N.G 半田付けを確認
・ [IC304]
・ [IC111]
N.G ク ロッ クの 波形確 認 N.G (1) [X101]を確認
・ [IC109]:4pin (2) 半田付けを確認
・ [IC109]
O.K.
半田付けを確認
･ R202
N.G 半田付けを確認
・ IC301,R112
半田付けを確認
1U-3836-1(MAIN UNIT)
N.G ・ [IC104]
半田付けを確認
1U-3836-1(MAIN UNIT)
N.G ・ [LD0-LD7],[LCS3,LOE]
半田付けを確認
N.G ・ IC105
S-102