Denon S-52 Service Manual page 38

Check Reset signal for LCD
1U-3846-1(MAIN UNIT)
[LCD_RST]
"H"level O.K.?
O.K.
Check control signal for LCD.
1U-3846-1(MAIN UNIT)
[LCD_RS],[LCD_WR],[LCD_CS],[D0-7]
[LCD_P],[LCD_BACK_LIGHT]
O.K.
END
2. CD doesn't playback(S-52,S-52DAB only)
(1) Check the Set-up process of BF(DSP) and FE Drive
Check Power Supply Voltages for FE Drive.
1U-3859-1(POWER UNIT)
+12V_D1
+5V_D1
O.K.
Check Reset signal for FE Drive.
1U-3846-1(MAIN UNIT)
[IDERST]
"H"level O.K.?
O.K.
Check control signal for FE Drive(ATAPI).
1U-3846-1(MAIN UNIT)
[DMARQ],[IORDY],DMACK],[INTRQ],[AWE],[ARE]
[AMS1],[AD18-19],[DA0-2],[DD0-15]
O.K.
END
N.G Check Soldering.
CX262 on MAIN UNIT.
Check Soldering.
N.G IC102,IC103,IC106,IC107 on MAIN UNIT.
IC701,TR703-705,CY064 on MAIN UNIT.
1U-3847-3(REMOTE SENSOR/LCD UNIT).
N.G Check Soldering.
1U-3859-1(POWER UNIT).
N.G Check Soldering.
CX301 on MAIN UNIT.
N.G Check Soldering.
IC111,IC112,IC113,CX301 on MAIN UNIT.
LCD用RESET信号の確認
1U-3846-1(MAIN UNIT)
・ [LCD_RST]
"H"level O.K.?
O.K.
LCD制御信号の確認
1U-3846-1(MAIN UNIT)
・ [LCD_RS],[LCD_WR],[LCD_CS],[D0-7]
・ [LCD_P],[LCD_BACK_LIGHT]
O.K.
終了
2. CD再生せず(S-52,S-52DABのみ)
(1) BF(DSP)とFEﾄﾞﾗｲﾌﾞ立ち上がりチェック工程
FE ﾄﾞﾗｲﾌﾞ用電源電圧確認
1U-3859-1(POWER UNIT)
・ +12V_D1
・ +5V_D1
O.K.
FEﾄﾞﾗｲﾌﾞ用RESET信号の確認
1U-3846-1(MAIN UNIT)
・ [IDERST]
"H"level O.K.?
O.K.
FEﾄﾞﾗｲﾌﾞ制御信号(ATAPI)の確認
1U-3846-1(MAIN UNIT)
・ [DMARQ],[IORDY],DMACK],[INTRQ],[AWE],[ARE]
[AMS1],[AD18-19],[DA0-2],[DD0-15]
O.K.
終了
38
S-52/S-52DAB/S-32
N.G 半田付けを確認
・ CX262 on MAIN UNIT.
半田付けを確認
N.G ・ IC102,IC103,IC106,IC107 on MAIN UNIT.
・ IC701,TR703-705,CY064 on MAIN UNIT.
・ 1U-3847-3(REMOTE SENSOR/LCD UNIT).
N.G 半田付けを確認
・ 1U-3859-1(POWER UNIT).
N.G 半田付けを確認
・ CX301 on MAIN UNIT.
N.G 半田付けを確認
・ IC111,IC112,IC113,CX301 on MAIN UNIT.