Denon RCD-CX1, Service Manual

Page: 40 / 116

40
RCD-CX1
3.2. 音声出力せず
(1) LINE(1/2) 入力時
Audio 系電源電圧確認
･ ± 12V̲A
N.G.
半田付けを確認
･ [CY074] [CX074]
･ 8U-210025 (SMPS UNIT) [ ± 12V̲A]
O.K.
SELECTOR 制御信号確認
･ [SEL̲CK] [SEL̲DATA] [SEL̲STB]
N.G.
半田付けを確認
･ [IC302] [IC501]
O.K.
VOLUME 用電源電圧確認
･ [IC503] 22pin "+7V" O.K.?
･ [IC503] 21pin "-7V" O.K.?
･ [IC507] 8pin "+7V" O.K.?
･ [IC507] 4pin "-7V" O.K.?
N.G.
半田付けを確認
･ [IC504] [RL505] [TR503] [IC507]
･ 8U-210025 (SMPS UNIT) [ ± 12V̲A]
O.K.
VOLUME 制御信号確認
･ [VOL̲CLOCK] [VOL̲DATA] [VOL̲LATCH]
N.G.
半田付けを確認
･ [IC302] [IC503]]
O.K.
PREOUT MUTE 信号確認
･ [IC302] 78pin "H"level O.K.?
N.G.
半田付けを確認
･ [IC302] [RL502] [TR505]
O.K.
PREOUT オーディオデータ 出力確認
･ [RCA] PREOUT Lch
･ [RCA] PREOUT Rch
N.G.
半田付けを確認
･ [IC508] [IC509]
O.K.
ICE POWER 電源電圧確認
･ ± 33V
･ ± 5V
･ -22V
N.G.
半田付けを確認
･ [IC702] [IC703] [TR708] [TR709] [ZD701]
･ 8U-210025 (SMPS UNIT) [ ± 33V] [ ± 12V̲A]
O.K.
ICE POWER 制御信号確認
･ [IC705] 4pin "H"level O.K.?
N.G.
半田付けを確認
･ [IC705] [TR701] [IC302]
O.K.
SP MUTE 制御信号確認
･ [IC302] 77pin "H"level O.K.?
N.G.
半田付けを確認
･ [IC302] [RL701] [TR701]
O.K.
SP TERMINAL オーディオデータ 出力確認
･ [SP TERMINAL] Lch
･ [SP TERMINAL] Rch
N.G.
半田付けを確認
･ [IC705] [RL701] [TR701] [CX022] [CX023]
O.K.
終了
3.2. No Sound
(1) LINE(1/2)-in
Check Power Supply Voltages for AUDIO.
•
±
12V_A
N.G.
Check Soldering.
• [CY074] [CX074]
• 8U-210025 (SMPS UNIT) [
±
12V_A]
O.K.
Check control signal for SELECTOR.
• [SEL_CK] [SEL_DATA] [SEL_STB]
N.G.
Check Soldering.
• [IC302] [IC501]
O.K.
Check Power Supply Voltages for VOLUME.
• [IC503] 22pin "+7V" O.K.?
• [IC503] 21pin "-7V" O.K.?
• [IC507] 8pin "+7V" O.K.?
• [IC507] 4pin "-7V" O.K.?
N.G.
Check Soldering.
• [IC504] [RL505] [TR503] [IC507]
• 8U-210025 (SMPS UNIT) [
±
12V_A]
O.K.
Check control signal for VOLUME.
• [VOL_CLOCK] [VOL_DATA] [VOL_LATCH]
N.G.
Check Soldering.
• [IC302] [IC503]
O.K.
Check PREOUT MUTE signal.
• [IC302] 78pin "H"level O.K.?
N.G.
Check Soldering.
• [IC302] [RL502] [TR505]
O.K.
Check PREOUT Audio Data output.
• [RCA] PREOUT Lch
• [RCA] PREOUT Rch
N.G.
Check Soldering.
• [IC508] [IC509]
O.K.
Check Power Supply Voltages for ICE POWER.
•
±
33V
•
±
5V
• -22V
N.G.
Check Soldering.
• [IC702] [IC703] [TR708] [TR709] [ZD701]
• 8U-210025 (SMPS UNIT) [
±
33V] [
±
12V_A]
O.K.
Check control signal for ICE POWER.
• [IC705] 4pin "H"level O.K.?
N.G.
Check Soldering.
• [IC705] [TR701] [IC302]
O.K.
Check control signal for SP MUTE.
• [IC302] 77pin "H"level O.K.?
N.G.
Check Soldering.
• [IC302] [RL701] [TR701]
O.K.
Check SP TERMINAL Audio Data output.
• [SP TERMINAL] Lch
• [SP TERMINAL] Rch
N.G.
Check Soldering.
• [IC705] [RL701] [TR701] [CX022] [CX023]
O.K.
END