Denon DVD-3930, Service Manual

Page: 38 / 176

38
DVD-3930/3930CI
データ確認 -4
GU-3751-1(AUDIO (DIGITAL) UNIT)
･ [IC103](EP2C8Q208C8N):
output to DAC(MIXL/MIXR/FL/FR/C/SW/SL/SR)
4 〜 6, 8, 10 〜 15, 30, 31, 33pin
GU-3751-2(AUDIO/MIX UNIT)
･ [IC702](DAC for MIXL), [IC707](DAC for MIXR)
4 〜 7pin(WCK=16/8/4fs, BCK=1024/512/256fs,
DATA,MCK=1024/512/256fs)
* fs=48/96/192
GU-3751-3(AUDIO/5.1 UNIT)
･ [IC401](DAC for FL/FR),
[IC406](DAC for C/SW),
[IC411](DAC for SL/SR) : input
4 〜 7pin(LRCK=1fs, BCK=64fs, DATA, MCK=256fs)
N.G.
半田付けを確認
･ CX125, CY125, CX126, CY126,
CX127, CY127, CX129, CY129
(GU-3751-1 to GU-3751-2 or GU-3751-3)
O.K.
DAC 出力確認
GU-3751-2(AUDIO/MIX UNIT)
･ [IC702] [IC707]: output
GU-3751-3(AUDIO/5.1 UNIT)
･ [IC401] [IC406] [IC411]: output
N.G.
半田付けを確認 / 電源を確認
･ [IC702] [IC707]
10 〜 12, 14pin(control line)
･ [IC401] [IC406] [IC411]
10 〜 12, 14pin(control line)
O.K.
OP AMP 出力確認
GU-3751-2(AUDIO/MIX UNIT)
･ [IC703] 〜 [IC706], [IC708] 〜 [IC711]
GU-3751-3(AUDIO/5.1 UNIT)
･ [IC402]〜[IC405], [IC407]〜[IC410], [IC412]〜[IC415]
N.G.
半田付けを確認
･ [IC703] 〜 [IC706], [IC708] 〜 [IC711]
POWER C, R
･ [IC402]〜[IC405], [IC407]〜[IC410], [IC412]〜[IC415]
POWER C, R
O.K.
出力端子の確認
GU-3751-2(AUDIO/MIX UNIT)
･ 各 ch の OUTPUT 端子からの出力信号を確認する
GU-3751-3(AUDIO/5.1 UNIT)
･ 各 ch の OUTPUT 端子からの出力信号を確認する
N.G.
半田付けを確認
･ MUTE circuit: MUTE TR (TR709 〜 712, TR715 〜 718,
TR721,722)
TR408 〜 437
TR-BASE terminal: about -9V (at MUTE off)
･ Check Soldering. Output Jack
O.K.
終了
Check DATA Signal -4
GU-3751-1(AUDIO (DIGITAL) UNIT)
• [IC103](EP2C8Q208C8N):
output to DAC(MIXL/MIXR/FL/FR/C/SW/SL/SR)
4~6, 8, 10~15, 30, 31, 33pin
GU-3751-2(AUDIO/MIX UNIT)
• [IC702](DAC for MIXL), [IC707](DAC for MIXR)
4~7pin(WCK=16/8/4fs, BCK=1024/512/256fs,
DATA,MCK=1024/512/256fs)
* fs=48/96/192
GU-3751-2(AUDIO/5.1 UNIT)
• [IC401](DAC for FL/FR),
[IC406](DAC for C/SW),
[IC411](DAC for SL/SR) : input
4~7pin(LRCK=1fs, BCK=64fs, DATA, MCK=256fs)
N.G.
Check Soldering.
• CX125, CY125, CX126, CY126,
CX127, CY127, CX129, CY129
(GU-3751-1 to GU-3751-2 or GU-3751-3)
O.K.
Check DAC output
GU-3751-2(AUDIO/MIX UNIT)
• [IC702] [IC707]: output
GU-3751-3(AUDIO/5.1 UNIT)
• [IC401] [IC406] [IC411]: output
N.G.
Check Soldering./Check Supply Voltages.
• [IC702] [IC707]
10~12, 14pin(control line)
• [IC401] [IC406] [IC411]
10~12, 14pin(control line)
O.K.
Check OP AMP output
GU-3751-2(AUDIO/MIX UNIT)
• [IC703]~[IC706], [IC708]~[IC711]
GU-3751-3(AUDIO/5.1 UNIT)
• [IC402]~[IC405], [IC407]~[IC410], [IC412]~[IC415]
N.G.
Check Soldering./Check Power Supply Voltages.
• [IC703]~[IC706], [IC708]~[IC711]
POWER C,R
• [IC402]~[IC405], [IC407]~[IC410], [IC412]~[IC415]
POWER C,R
O.K.
Check AUDIO OUT
GU-3751-2(AUDIO/MIX UNIT)
• Check OUTPUT terminal (Each channels)
GU-3751-3(AUDIO/5.1 UNIT)
• Check OUTPUT terminal (Each channels)
N.G.
Check Soldering.
• MUTE circuit: MUTE TR (TR709~712, TR715~718,
TR721,722)
TR408~437
TR-BASE terminal: about -9V (at MUTE off)
• Check Soldering. Output Jack
O.K.
END