Denon DCD-CX3 - 1 U-3788;1 U-3789-5 Unit Troubleshooting; FL Tube Does Not Light

30
DCD-CX3
2. 1U-3788(DISPLAYUNIT)/1U-3789-5(SACDMODULEUNIT)
2.1. FL 管点灯せず
(1)
システム立ち上がりチェック工程
電源電圧確認
1U-3789-5(DISPLAYUNIT)
･ [CX082]5pin
+3.3VDISPOK?
N.G.
半田付けを確認
･ 1U-3789-5(DISPLAYUNIT)
･ [FL601],[CX082]
O.K.
電源電圧確認
1U-3788(SACDMODULEUNIT)
･[C167]+端子
+3.3VD4OK?
N.G.
半田付けを確認
1U-3788(SACDMODULEUNIT)
･ [CY101]1pin+3.3V ライン
O.K.
RESET 信号の確認
1U-3788(SACDMODULEUNIT)
･［CX131]12pin
"H"levelat12pin?
N.G.
半田付けを確認
1U-3788(SACDMODULEUNIT)
･ [IC116](TMP86FH47)20pin"NRST"
O.K.
発振波形確認
1U-3788(SACDMODULEUNIT)
･ 8MHz:[IC116]2,3pin
･ 27MHZ:[IC108]162,163pin
･ 33.87MHz:[IC108]190in
N.G.
半田付けを確認
1U-3788(SACDMODULEUNIT)
･ [IC116],[IC108]
O.K.
バスラインの確認
1U-3788(SACDMODULEUNIT)
･ [IC108] と [IC106](FlashRom) 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
1U-3788(SACDMODULEUNIT)
･ [LD0-LD15],[LCS3,LOE]
O.K.
バスラインの確認
1U-3788(SACDMODULEUNIT)
･ [IC108] と [IC109][IC112](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
[MDQ0-24],[MA0-9],[NCAS],[NRAS]
･ [IC109][IC112] とその周辺回路の半田付けを確認
O.K.
I
２
C 信号の確認
1U-3788(SACDMODULEUNIT)
･ [IC108]66,67
"H"⇔ "L"切替
N.G.
半田付けを確認
1U-3788(SACDMODULEUNIT)
･ [IC103][IC108]
O.K.
データバスの確認
1U3789-5(DISPLAYUNIT)
FL60118pin
･ [RST]:"H"level?
･ テストモードT0実行全点灯 OK?
N.G.
1U-3789-5(DISPLAYUNIT)
(1) CY132 の半田付けを確認
(2) FL601 の半田付けを確認
O.K.
終了
2. 1U-3788(DISPLAY UNIT)/1U-3789-5(SACD MODULE UNIT)
2.1. FL TUBE dosen't light
(1) Check the Set-up process of System
Check Power Supply Voltages.
1U-3789-5(DISPLAY UNIT)
• [CX082] 5pin
+3.3V_DISP OK?
N.G.
Check Soldering.
1U-3789-5(DISPLAY UNIT)
• [FL601], [CX082]
O.K.
Check Power Supply Voltages.
1U-3788(SACD MODULE UNIT)
• [C167] +Terminal
+3.3V_D4 OK?
N.G.
Check Soldering.
1U-3788(SACD MODULE UNIT)
• [CY101] 1pin +3.3V Line
O.K.
Check Reset signal.
1U-3788(SACD MODULE UNIT)
• [CX131] 12pin
"H" level at 12pin
N.G.
Check Soldering.
1U-3788(SACD MODULE UNIT)
• [IC116] (TMP86FH47) 20pin "NRST"
O.K.
Check Oscillation waveform.
1U-3788(SACD MODULE UNIT)
• 8MHz : [IC116] 2, 3pin
• 27MHZ : [IC108] 162, 163pin
• 33.87MHz : [IC108] 190in
N.G.
Check Soldering.
1U-3788(SACD MODULE UNIT)
• [IC116], [IC108]
O.K.
Check Bus Line.
1U-3788(SACD MODULE UNIT)
Check Address, Data Bus between
[IC108] and [IC106](Flash Rom)
"H" ⇔ "L" alternate?
N.G.
Check Soldering.
1U-3788(SACD MODULE UNIT)
• [LD0-LD15], [LCS3, LOE]
O.K.
Check Bus Line.
Check Address, Data Bus between
1U-3788 (SACD MODULE UNIT)
•
[IC108], [IC109] and [IC112] (SDRAM)
"H" ⇔ "L" alternate?
N.G.
Check Soldering.
• Address, Data Bus, Control Signal.
[MDQ0-24], [MA0-9], [NCAS], [NRAS]
• Check the soldering [IC108] [IC112]and
circumference soldering of [IC108] [IC112].
O.K.
Check I
2
C Signal.
1U-3788(SACD MODULE UNIT)
• [IC108] 66, 67
"H" ⇔ "L" alternate?
N.G.
Check Soldering.
1U-3788(SACD MODULE UNIT)
• [IC103] and [IC108]
O.K.
Check Data Bus
1U-3789-5(DISPLAY UNIT)
FL601 18pin
• [RST]: "H" level?
• The test mode "T0" is executed.
The FL tube display turns all on?
N.G.
1U-3789-5(DISPLAY UNIT)
(1) Check Soldering of CY132
(2) Check Soldering of FL601
O.K.
END