Denon RCD-CX1 Service Manual page 40

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