Denon RCD-CX1 Service Manual

39
RCD-CX1
3. 8U-210024(SYS/DAMP/DISPUNIT)
3.1. FL 管点灯せず
(1) システムマイコン立ち上がりチェック工程
システムマイコン用電源電圧確認
･ [CY112]6pin"+3.3VNSW"
N.G.
半田付けを確認
･ [CY112]
･ 8U-210025(SMPSUNIT)[CX112]
O.K.
システムマイコン用 RESET 信号確認
･ [IC302]10pin"H"levelO.K.?
N.G.
半田付けを確認
･ [IC302][IC303]
O.K.
システムマイコン発振波形確認
･ [IC302]11pin4MHzO.K.?
N.G.
半田付けを確認
･ [X301][IC302]
O.K.
POWERON信号確認
･ [IC302]80pin"H"levelO.K.?
N.G.
半田付けを確認
･ [IC302][CY112]
･ 8U-210025(SMPSUNIT)[CX112]
O.K.
FL 管用電源電圧確認
･FL+
･FL-
･+32V
N.G.
半田付けを確認
･ [TR704][TR705][D708-D715][IC704]
 [L701][T701]
O.K.
バスライン確認
･ [IC302] と [FL101] 間の信号確認
"H" ⇔ "L" 切替
N.G.
半田付けを確認
･ [FL101][CX251][CY251]
O.K.
終了
3. 8U-210024(SYS/DAMP/DISP UNIT)
3.1. FL TUBE dosen't light
(1) Check the Set-up process of System μcom
Check Power Supply Voltages forSystem μcom.
• [CY112] 6pin "+3.3V_NSW"
N.G.
Check Soldering.
• [CY112]
• 8U-210025 (SMPS UNIT) [CX112]
O.K.
Check Reset signal forSystem μcom.
• [IC302] 10pin "H"level O.K.?
N.G.
Check Soldering.
• [IC302] [IC303]
O.K.
Check Oscillation waveform forSystem μcom.
• [IC302] 11pin 4MHz O.K.?
N.G.
Check Soldering.
• [X301] [IC302]
O.K.
Check Power On signal.
• [IC302] 80pin "H"level O.K.?
N.G.
Check Soldering.
• [IC302] [CY112]
• 8U-210025 (SMPS UNIT) [CX112]
O.K.
Check Power Supply Voltages forFL TUBE.
•FL+
•FL-
•+32V
N.G.
Check Soldering.
• [TR704] [TR705] [D708-D715] [IC704] [L701] [T701]
O.K.
Check Bus Line.
• Check signal, between [IC302] and [FL101].
"H" ⇔ "L" alternate?
N.G.
Check Soldering.
• [FL101] [CX251] [CY251]
O.K.
END

Denon RCD-CX1 Specifications

General

Brand	Denon
Model	RCD-CX1
Category	Car Receiver
Language	English