Denon DVD-3930, Service Manual

Page: 33 / 176

33
DVD-3930/3930CI
(2) CD or DVD チェック工程
(3) SACD チェック工程
RF 信号の確認
GU-3749-1(MAIN UNIT)
･ テストポイント (TP) の電圧確認
･ TP [AMON1] [AMON2]: 差動出力 約 700mVp-p
N.G.
半田付けを確認
GU-3749-1(MAIN UNIT)
･ [IC157] とその周辺の半田付けを確認
O.K.
電源電圧確認
GU-3749-1(MAIN UNIT)
･ [IC401]
+3.3̲D2, +2.5̲D2 OK?
N.G.
半田付けを確認
･ GU-3749-1(MAIN UNIT）
･ [IC101](BA25BCOFP-E2)
O.K.
発振波形確認
GU-3749-1(MAIN UNIT)
･ [IC401](CXD2753): 11pin
33.87MHz(3.3V) OK?
N.G.
半田付けを確認
GU-37 4 9-1(MAIN UNIT)
･ [IC401]: 11pin, R271
O.K.
RESET 信号の確認
GU-3749-1(MAIN UNIT)
･［IC401]: 9pin
"H" level OK?
N.G.
半田付けを確認
GU-37 4 9-1(MAIN UNIT)
･ R422
O.K.
バスラインの確認
GU-3749-1(MAIN UNIT)
･ [IC401] と [IC409](SDRAM) 間の
アドレス、データバスの確認
"H" ⇔ "L" 切替
N.G.
半田付けを確認
･ アドレス、データ、制御信号
[DQ0-7], [D̲MA0-11], [DCLK], [DCKE], [DWE],
[NCAS], [NRAS]
･ R440-459, R404-408
O.K.
データラインの確認
GU-3749-1(MAIN UNIT)
･ [SD0-7], [XSAC], [XSHD2], [SDCK], [SDEF], [XSRQ]
"H" ⇔ "L" 切替
N.G.
半田付けを確認
GU-3749-1(MAIN UNIT)
･ [IC401]: 164-176pin, R271
･ [IC414]
O.K.
ウォーターマーク用信号の確認
GU-3749-1(MAIN UNIT)
･ PSP̲MCK, PSP̲WAD1-PSP̲WAD7
"H" ⇔ "L" 切替
･ テストモード TE 実行 190 以上？
N.G.
半田付けを確認
GU-3749-1(MAIN UNIT)
･ [IC401]: 1, 23, 117-120, 111-114pin
R418, R421, RR406-411
O.K.
終了
終了
(2) CD or DVD check process
(3) SACD check process
Check the RF signal.
GU-3749-1(MAIN UNIT)
• Check the voltage of Test-Point (TP))
• TP[mAMON1] [AMON2]: differential output about
700mVp-p
N.G.
Check Soldering.
GU-3749-1(MAIN UNIT)
• Check the circumference soldering of [IC157]
O.K.
Check Power Supply Voltages.
GU-3749-1(MAIN UNIT)
• [IC401]
+3.3_D2, +2.5_D2 OK?
N.G.
Check Soldering.
GU-3749-1(MAIN UNIT)
• [IC101](BA25BCOFP-E2)
O.K.
Check Oscillation waveform.
GU-3749-1(MAIN UNIT)
• [IC401](CXD2753): 11pin
33.87MHz(3.3V) OK?
N.G.
Check Soldering.
GU-3749-1(MAIN UNIT)
• [IC401]: 11pin, R271
O.K.
Check Reset signal.
GU-3749-1(MAIN UNIT)
• [IC401]: 9pin
"H" level OK?
N.G.
Check Soldering.
GU-3749-1(MAIN UNIT)
• R422
O.K.
Check Bus Line.
GU-3749-1(MAIN UNIT)
Check Address, Data Bus between
[IC401] and [IC409](SDRAM)
"H"
⇔
"L" alternate?
N.G.
Check Soldering.
• Address, Data Bus, Control Signal.
[DQ0-7], [D_MA0-11], [DCLK], [DCKE], [DWE],
[DCAS], [DRAS]
• R440-459, R404-408
O.K.
Check Data Line.
GU-3749-1(MAIN UNIT)
• [SD0-7], [XSAC], [XSHD2], [SDCK], [SDEF], [XSRQ]
"H"
⇔
"L" alternate?
N.G.
Check Soldering.
GU-3749-1(MAIN UNIT)
• [IC401]:164-176pin, R271
• [IC414]
O.K.
Check signal for Water Mark.
GU-3749-1(MAIN UNIT)
• PSP_MCK, PSP_WAD1-PSP_WAD7
"H"
⇔
"L" alternate?
• The test mode "TE" is executed. 190 over?
N.G.
Check Soldering.
GU-3749-1(MAIN UNIT)
• [IC401]: 1, 23, 117-120, 111-114pin
R418, R421, RR406-411
O.K.
END
END