Denon D RCD-M37, Service Manual

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23
RCD-M37 / RCD-M37DAB / D-E500 / D-M37
TROUBLE SHOOTING
トラ ルシューティン
1. LCD dosen't light
1. LCD せ
Check Power Supply Voltages for System uCOM.
MCU_CD_USB B'D
N.G Check Soldering.
䊶
ST+3.9V, CN96 1pin
䊶 䌃䌎
96
䇭
1
䌰䌩䌮
䊶 D204 cathode 䊶 SUB TRANS B'D
O.K.
Check Reset signal for System uCOM.
MCU_CD_USB B'D
N.G Check Soldering.
䊶 [IC24]:30pin RESET 䊶 IC20 on MCU_CD_USB B'D
"H"level O.K.?
O.K.
Check Oscillation waveform.
MCU_CD_USB B'D
N.G Check Soldering.
䊶
[IC24]:26pin
䊶
X202 on MCU_CD_USB B'D
27MHz OK?
O.K.
Check Power On Signal.
MCU_CD_USB B'D
N.G Check Soldering.
䊶 [IC24]:9pin P_DWN 䊶 CN96 on MCU_CD_USB B'D
"H"level OK? 䊶 SUB TRANS B'D
O.K.
Check Power Supply Voltages for FLD. Check Soldering.
FRONT B'D
䊶
FRONT B'D BN82 7pin +VKK
䊶 FL81]:38pin HV 䊶 FRONT B'D BN82 8pin FL1-9pin FL2
䊶
FL81]:37pin VDD
䊶
FRONT B'D WF81 5pin VFD_5V
䊶 [FL81]:between 1pin F1-43pin F2 N.G 䊶 AMP B'D CN95 8pin AC15V
䊶
AMP B'D ,CN82 7pin
䇭
+VKK
䊶 MCU_CD_USB B'D WN81 1pin VFD+5V
䊶
POWER B'D
Check Parts
䊶
AMP B'D
㩷 Q703,D702,,D705, D703,D704 OK?
O.K.
Check Reset Signal for FLD. Check Soldering.
FRONT B'D N.G 䊶 FRONT B'D WF81 3pin, VFD_RST1
䊶
FL81 35pin /RST
䊶
MCU_CD_USB B'D WN81 3pin VFD_RST
Hlevel O.K.? 䊶 IC24 on MCU_CD_USB B'D
Check Parts
䊶 FRONT B'D Q804 OK?
O.K.
Check FLD dirive Signal for FLD. Check Soldering.
FRONT B'D N.G 䊶 FRONT B'D WF81 4,5,6pin,
䊶 FL81 32,33,34pin DA,CP,CS VFD_CE,VFD_CLK,VFD_DI
䊶 MCU_CD_USB B'D WN81 4,5,6pin,
VFD_CE,VFD_CLK,VFD_DI
䊶
IC24 on MCU_CD_USB B'D
Check Parts
䊶
FRONT B'D Q801,802,803 OK?
END
トラブルシューティング
トラブルシューティング
1. LCD点灯せず
ｼｽﾃﾑﾏｲｺﾝ用電源電圧確認
MCU̲CD̲USB B'D
N.G 半田付けを確認
・ ST+3.9V, CN96 1pin ・ CN96 1pin
・ D204 ｶｿｰﾄﾞ ・ SUB TRANS B'D
O.K.
ｼｽﾃﾑﾏｲｺﾝ用RESET信号の確認
1U-3846-1(MAIN UNIT)
N.G 半田付けを確認
・ [IC24]:30pin RESET ・ IC20 on MCU̲CD̲USB B'D
"H"level O.K.?
O.K.
発振波形確認
1U-3846-1(MAIN UNIT)
N.G 半田付けを確認
・ [IC24]:26pin ・ X202 on MCU̲CD̲USB B'D
27MHz OK?
O.K.
POWER ON 信号の確認
MCU̲CD̲USB B'D
N.G 半田付けを確認
・ [IC24]:9pin P̲DWN ・ CN96 on MCU̲CD̲USB B'D
"H"level OK? ・ SUB TRANS B'D
O.K.
LCD用電源電圧確認 半田付けを確認
・ FL81]:38pin HV ・ FRONT B'D BN82 7pin +VKK
・ FL81]:37pin VDD ・ FRONT B'D BN82 8pin FL1-9pin FL2
・ [FL81]: 1pin F1-43pin F2 ・ FRONT B'D WF81 5pin VFD̲5V
N.G ・ AMP B'D CN95 8pin AC15V
・ AMP B'D ,CN82 7pin +VKK
・ MCU̲CD̲USB B'D WN81 1pin VFD+5V
・ POWER B'D
部品確認
・ AMP B'D
Q703,D702,,D705, D703,D704 OK?
O.K.
FLD用RESET信号の確認 半田付けを確認
FRONT B'D N.G ・ FRONT B'D WF81 3pin, VFD̲RST1
・ FL81 35pin /RST ・ MCU̲CD̲USB B'D WN81 3pin VFD̲RST
Hlevel O.K.? ・ IC24 on MCU̲CD̲USB B'D
部品確認
・ FRONT B'D Q804 OK?
O.K.
FLD用ドライブ信号の確認 半田付けを確認
FRONT B'D N.G ・ FRONT B'D WF81 4,5,6pin,
・ FL81 32,33,34pin DA,CP,CS VFD̲CE,VFD̲CLK,VFD̲DI
・ MCU̲CD̲USB B'D WN81 4,5,6pin,
VFD̲CE,VFD̲CLK,VFD̲DI
・ IC24 on MCU̲CD̲USB B'D
部品確認
・ FRONT B'D Q801,802,803 OK?
終了