Philips MCB275/05 Service Manual Download | Manualshive

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6-4

6-4

CIRCUIT DIAGRAM - MAIN BOARD

FM TUNER PART

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Summary of Contents for MCB275/05

Page 1: ...ilips Published by SL0732 Service Audio Printed in The Netherlands Subject to modification GB 3141 785 31772 Micro System TABLE OF CONTENTS Page Location of PC Boards Versions Variation 1 2 Specifications 1 3 Measurement Setup 1 4 Service Aids Safety Instruction etc 1 5 CD Playability Check 1 6 to 1 8 Disassembly Instructions Service positions 2 Service Test Program 3 1 Set Block Diagram 4 1 Set W...

Page 2: ... Matrix Surround x S D R x s w e N Dolby Pro Logic DPL Incredible Surround Karaoke Features Voltage Selector ECO Power Standby LCD Display Off x ECO6 Tuner Board Systems Non Cenelec x ECO6 Tuner Board Systems Cenelec USB Direct VERSION VARIATIONS Type Versions MCB275 Features Board in used 05 x VERSION VARIATIONS ...

Page 3: ... 18dB IF rejection 45dB Image rejection 28dB Distortion at RF 50mV M 80 5 AMPLIFIER Output power L R 2 x 5 0W 4Ω 1kHz 10 THD Frequency response within 3dB 50Hz 16kHz Digital Sound Control DSC Jazz Rock Pop Classic Input sensitivity Aux in at 1kHz 500mV at 600 Ω Output sensitivity Headphone output at 32 Ω 10mW 2dB Max vol COMPACT DISC Frequency response within 3dB 125Hz 16kHz Output level in Vrms 5...

Page 4: ...15kHz e g 7122 707 48001 LF Voltmeter e g PM2534 DUT S N and distortion meter e g Sound Technology ST1700B Frame aerial e g 7122 707 89001 Tuner AM MW LW To avoid atmospheric interference all AM measurements have to be carried out in a Faraday s cage Use a bandpass filter or at least a high pass filter with 250Hz to eliminate hum 50Hz 100Hz RF Generator e g PM5326 Ri 50Ω Bandpass 250Hz 15kHz e g 7...

Page 5: ...ICE AIDS GB WARNING All ICs and many other semi conductors are susceptible to electrostatic discharges ESD Careless handling during repair can reduce life drastically When repairing make sure that you are connected with the same potential as the mass of the set via a wrist wrap with resistance Keep components and tools also at this potential ESD CLASS 1 LASER PRODUCT GB Safety regulations require ...

Page 6: ...replace CD Drive Laser current ok N Y check Laser current CD Drive offsets ok N Y check CD Drive offsets clean the lens check playability return set Customer complaint CD related problem return set return set replace CD Drive return set replace CD Drive return set replace Signal Processor return set fast lens cleaning 1 2 3 4 5 6 7 For flap loaders access to CD drive possible cleaning method 4 is ...

Page 7: ...ted to contact the workshop directly The lens cleaning method 3 should be mentioned in the addendum sheet The final wording in national language as well as the printing is under responsibility of the Regional Service Organizations 3 FAST LENS CLEANING dry brush Use lens cleaning CD SBC AC300 9082 100 00043 Insert the lens cleaning CD press PLAY and follow the voice guide s instructions on the CD 4...

Page 8: ... with a DC Millivoltmeter directly on the connector see drawing below Pin numbering varies from drive to drive The values from diode A D should read 0 10mV Diodes E and F are less critical If one of the offsets is higher than 10mV the CD drive has to be replaced Otherwise replace the Signal Processor Sanyo DA12T3 CD Drive A A F C B E C D E VCC B VREF F D 9 10 11 12 13 14 15 16 1800 5V_HF VrefCD10 ...

Page 9: ...e Rear Portion and PCBs Figure 3 Figure 2 Dismantling the Rear Portion and PCBs 5 Loosen 2 screws E to remove the Bracket Jack Board as shown in Figure 4 6 Loosen 3 screws F to remove the Main Board as shown in figure 5 Figure 4 Figure 5 Figure 1 Dismantling of the Display Lens the Volume knob 1 Use a flat head screw driver to give a push in the direction as shown in figure 6 Figure 6 2 Place two ...

Page 10: ... Loosen 5 screws J mounting the Key Board to the Front Cabinet to remove the Key Board as shown in figure 8 2 Loosen 4 screws H and 3 screws G to CD Module as shown in figure 8 3 Loosen 2 screws I to remove the Servo Motor Mechanism as shown in figure 8 Figure 8 4 Loosen 4 screws K to remove the Right CD Door Carrier and 4 screws L to remove the Left CD Door Carrier as shown in figure 9 Figure 9 S...

Page 11: ...d 5V Display shows ADC3 Value for ADC3 Input Line Door switch status Y Y N N Display shows Table 1 KEY TEST Button pressed 9 Button pressed Display shows the MCU version MCU Vyy Main menu V refers to Version yy refers to Software version number of the uProcessor counting up from 01 to 99 To enter Service Testprogram hold PLAY Door Open Close buttons depressed while plugging mainscord in Door switc...

Page 12: ...4 1 4 1 SET BLOCK DIAGRAM ...

Page 13: ...SET WIRING DIAGRAM 5 1 5 1 ...

Page 14: ...6 1 6 1 PCB LAYOUT MAIN BOARD TOP VIEW ...

Page 15: ...PCB LAYOUT MAIN BOARD BOTTOM VIEW 6 2 6 2 ...

Page 16: ...6 3 6 3 CIRCUIT DIAGRAM MAIN BOARD AUDIO PART ...

Page 17: ...6 4 6 4 CIRCUIT DIAGRAM MAIN BOARD FM TUNER PART ...

Page 18: ...6 5 6 5 CIRCUIT DIAGRAM MAIN BOARD SUB MCU PART ...

Page 19: ...6 6 6 6 CIRCUIT DIAGRAM MAIN BOARD INTERFACE PART ...

Page 20: ...6 7 6 7 CIRCUIT DIAGRAM MAIN BOARD DAB PART ...

Page 21: ...6 8 6 8 CIRCUIT DIAGRAM MAIN BOARD POWER PART ...

Page 22: ...7 1 PCB LAYOUT LCD BOARD TOP VIEW 7 1 PCB LAYOUT LCD BOARD BOTTOM VIEW ...

Page 23: ...7 2 CIRCUIT DIAGRAM LCD BOARD 7 2 ...

Page 24: ...7 3 PCB LAYOUT KEY BOARD TOP VIEW 7 3 PCB LAYOUT KEY BOARD BOTTOM VIEW ...

Page 25: ...7 4 CIRCUIT DIAGRAM KEY BOARD 7 4 ...

Page 26: ...8 1 PCB LAYOUT CD BOARD TOP VIEW 8 1 ...

Page 27: ...8 2 PCB LAYOUT CD BOARD BOTTOM VIEW 8 2 ...

Page 28: ...8 3 CIRCUIT DIAGRAM CD BOARD 8 3 ...

Page 29: ...8 4 LAYOUT DIAGRAM MCU BOARD TOP VIEW 8 4 LAYOUT DIAGRAM MCU BOARD BOTTOM VIEW ...

Page 30: ...8 5 CIRCUIT DIAGRAM MCU BOARD 8 5 ...

Page 31: ...8 6 CIRCUIT DIAGRAM MCU BOARD MEMORY PART 8 6 ...

Page 32: ...3908 POWER SOURCE BUTTON D 996510003939 POWER SUPPLY 14V 1 8A 12 996510003925 GEAR WHEEL C 13 996510003923 GEAR WHEEL A 14 996510003924 GEAR WHEEL B 15 994000004325 BELT MOTOR 17 996510003906 REAR CABINET 19 996510003935 STAND COVER 20 996510003936 STAND BASE 22 996510003903 DAMPER A 23 996510006482 CD MECHANISM CMS M93BGP 24 994000001664 DAMPER GEAR ASS Y 26 994000005312 CATCH ASSEMBLY 28 9965100...

Page 33: ...LATOR CN913 996510003889 SPEAKER SOCKET 4P IC803 996510003731 I C V REGULATOR LD1117 3 3 CN920 996510003890 FM ANT SOCKET L904 996510000388 CHOKE COIL 8UH 3A1941N IC901 996510003715 I C TDA1517 SOT110 L905 996510000388 CHOKE COIL 8UH 3A1941N IC902 996510003846 I C SC7314 SELECTOR E_VOL L906 996510000388 CHOKE COIL 8UH 3A1941N L613 996510003728 BOBBIN COIL 2 1 2T L614 996510003729 BOBBIN COIL 3 1 2...

Page 34: ...eleased 1 1 Manual 3141 785 31771 In this version the instruction of CD playability check is added and Electrical Partslist is updated 1 2 Manual 3141 785 31772 In this version P9 2 Mechanical Partslist is updated Change Pos 23 CDM 12NC from 996510003930 to 996510006482 ...

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