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SPHINX

Myth 5 Service Manual

15

Schematic Diagram Power Supply

ACP1

ACP3

ACP4

ACP2

ACINP2

EARTH

ACINP1

SW1A

115_230

SW1B

115_230

NTC1

2.5E/8A

C1

220N

C3

220N

C2

220N

C4

220N

D3
SB356

ACS1

ACS4

ACS2

ACS3

+

C5

2200U/50V

+

C6

2200U/50V

+

C15

2200U/50V

+

C16

2200U/50V

GND

GND

+V

-V

Q1
BD679

D2

ZF24V

R2
10K

R1

56R/2W

D1

1N4148

+

C10

10U

+V

+24V

+24VOUT

GNDOUT

+

C7

2200U/50V

+

C8

2200U/50V

+

C17

2200U/50V

+

C18

2200U/50V

+

C11

2200U/50V

+

C12

2200U/50V

+

C13

2200U/50V

+

C14

2200U/50V

+

C19

2200U/50V

+

C20

2200U/50V

+

C21

2200U/50V

+

C22

2200U/50V

+V

-V

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Summary of Contents for MYTH 5

Page 1: ...1 SERVICE MANUAL MYTH 5 INTEGRATED STEREO AMPLIFIER ...

Page 2: ...L 7 Buttons 7 Operation 8 Selecting without switching 8 Batteries 8 Encountering problems 8 6 TECHNICAL SPECIFICATIONS 9 7 ADJUSTMENT PROCEDURES 10 Bias 10 Offset 10 Preamp Offset 10 8 PROBLEMS AND SOLUTIONS 11 9 DIAGRAMS AND PARTS LISTS 12 Measurement Set up 13 General Overview Myth 5 14 Schematic Diagram Power Supply 15 Schematic Diagram Amplifier Left 16 Schematic Diagram Amplifier Right 17 Sch...

Page 3: ...is subjected to stringent and extensive technical and exterior quality inspection This ensures you will enjoy many years of high quality audio from a perfect looking product After unpacking your Myth 5 we therefore recommend you carefully check it for any transport damage In case of damage please contact your Sphinx dealer immediately and retain all packing materials for possible proof of damage a...

Page 4: ...E To select the TAPE IN input As soon as you have pressed one of the buttons 2 to 6 the corresponding red LED next to it will light 7 STANDBY To switch the component on and off When the component is off standby this is indicated by the red LED 8 Sensor window for the IR signal from the Remote Control 9 VOLUME With this motor controlled knob you may adjust the volume of the loudspeakers The volume ...

Page 5: ...t to the Input of the recorder 15 TAPE IN Connect this input to the output of the recorder 16 RIGHT OUTPUT To connect the cable from the right loudspeaker red black 17 LEFT OUTPUT To connect the cable from the left loudspeaker red black 18 Manufacturer s label This shows important data for the component such as serial number and mains power voltage 19 AC Power Connect the mains cable to a mains po...

Page 6: ... LED off signal from selected input When using a 3 head recorder you can therefore compare the original signal with the actual recorded signal you ll hear the off tape signal which might be slightly delayed Adjusting the volume Using the large VOLUME control 9 you can adjust the sound level from the loudspeakers This volume control is motor controlled If you adjust the volume on the Remote Control...

Page 7: ...r will control only the amp functions 2 STANDBY Use this red button to switch the loudspeaker outputs of the Myth 5 off standby 3 1 4 To select inputs CD to Line 2 Note 5 to 0 do not function 1 CD 2 Tuner 3 Line 1 4 Line 2 4 TAPE MONITOR Use this button to select the Tape IN input 5 button Pressing this button has the same effect as rotating the VOLUME control on the front panel clockwise You incr...

Page 8: ...ntrol with the different Sphinx components will be explained in the corresponding User Manual of each component Batteries The four batteries have a life span of approximately one year during normal use but shorter when used more intensely Replacement batteries 1 5 V model micro or penlite or LR03 or AAA or AM4 one of these codes is indicated on the packaging and the batteries You may also use rech...

Page 9: ...1 1 000 Hz Inputs Cinch unbalanced 1x Line 2 1x Line 1 1x CD 1x Tuner 1x Tape Level nominal 1 25 V Impedance 20 kΩ Outputs Cinch 1x Tape Headphones 1x 6 3 mm stereo jack adjustable level Clamp 1x loudspeaker L 1x loudspeaker R Supply capacitance 35 200 µF total Power consumption 600 W max Dimensions h x w x d 73 x 434 x 350 mm Weight 8 kg This unit conforms to the EMC interference regulations issu...

Page 10: ...t procedure minimises the DC offset value of the amplifier output This DC offset is important when capacitive loads are used such as electrostatic loudspeakers These loudspeakers often use a very low impedance step up transformer The amplifier sees this load as a short for the DC voltage Connect the amplifier according to the drawing Measurement Set up page 14 The input of the amplifier must be sh...

Page 11: ...may enter the info in this table This table can then be used for future reference Please also send by fax or e mail the specific information to the Sphinx International Service Department see page 3 this info can then be added to the general database to aid others Problem Cause Solution Refer to page Protection activates Temperature of amplifier is too high Re adjust bias ...

Page 12: ...HINX Myth 5 Service Manual 12 9 DIAGRAMS AND PARTS LISTS The next pages contain the front and rear panel lay out and a complete set of schematic drawings including the associated parts lists if applicable ...

Page 13: ...ice Manual 13 Measurement Set up GND GND Left Right B MYTH 3 out1 out2 inp2 inp1 gnd THD Amplitude Frequency Oscillator THD out x y inp2 time div inp1 gnd out1 out2 inp2 inp1 Scoop SWITCH BOX mV mV 8R 8R GND GND GND GND ...

Page 14: ...5 SIG_L V V Myth 5 amplifier leftchannel M5 AMPL SCH SIG_L V V V V Myth 5 powersupply M5 PS SCH V V SIG_R SIG_L Myth5 M5 IO SCH SIG_R SIG_L Myth 5 control M5 CTRL SCH SIG R V V Myth 5 amplifier rightchannel M5 AMPR SCH SIG R V V Myth 5 keyboard M5 KEYB SCH ...

Page 15: ...0N C2 220N C4 220N D3 SB356 ACS1 ACS4 ACS2 ACS3 C5 2200U 50V C6 2200U 50V C15 2200U 50V C16 2200U 50V GND GND V V Q1 BD679 D2 ZF24V R2 10K R1 56R 2W D1 1N4148 C10 10U V 24V 24VOUT GNDOUT C7 2200U 50V C8 2200U 50V C17 2200U 50V C18 2200U 50V C11 2200U 50V C12 2200U 50V C13 2200U 50V C14 2200U 50V C19 2200U 50V C20 2200U 50V C21 2200U 50V C22 2200U 50V V V ...

Page 16: ...2R R20L 300R R21L 300R R25L 22R Q8L C2240 Q7L C2240 P2L 500R AGND AGND AGND AGND AGND AGND Q9L C2240 P3L 50k R41L 50k Q11L A1145 Q10L C2705 Q12L C4382 Q13L A1668 R27L 56R 2W R37L 100R R38L 100R R30L 0R22 R31L 0R22 R32L 47R 2W R34L 10R 5W R33L 10R 5W R22L 2R2 R23L 2R2 Q15L J200 Q14L K1529 D6L 1N4007 D7L 1N4007 C7L 47N AGND A B IC1L CNY17 D 4 8 6 REL6LB RELAISDPDT 13 9 11 REL6LC RELAISDPDT L1L EE K ...

Page 17: ...2R R20R 300R R21R 300R R25R 22R Q8R C2240 Q7R C2240 P2R 500R AGND AGND AGND AGND AGND AGND Q9R C2240 P3R 50k R41R 50k Q11L A1145 Q10R C2705 Q12R C4382 Q13R A1668 R27R 56R 2W R37L 100R R38L 100R R30R 0R22 R31R 0R22 R32R 47R 2W R34R 10R 5W R33R 10R 5W R22R 2R2 R23R 2R2 Q15R J200 Q14R K1529 D6R 1N4007 D7R 1N4007 C7R 47N AGND A B IC1R CNY17 D 4 8 6 REL6LB RELAISDPDT 13 9 11 REL6RC RELAISDPDT L1R EE K ...

Page 18: ...L16 REL3 REL16 REL4 REL16 REL5 REL16 LINE2 LINE1 TUNER CD TAPEOUT TAPEIN SIG_L SIG_R D8 1N4148 D9 1N4148 D10 1N4148 D11 1N4148 D12 1N4148 24V C20R 120P C20L 120P AGND AGND AGND 9 10 7 8 6 4 3 P1 2 ALPS20K P1 1 ALPS20K R2 475R R1 475R L_O R_O R I L_I LGI RGI LGO RGO R1 1K R2 1K R3 1K R6 1K R5 1K R4 1K ORANJE RIGHT GROEN LEFT RIGHTPHONES GND PHONES LEFTPHONES GEEL GND ...

Page 19: ...gram Keyboard S1A S1B S2A S2B S3A S3B S4A S4B S5A S5B S6A S6B R1 3K3 R2 3K3 D1 LED D2 LED D3 LED D4 LED D5 LED D6 LED R3 3K3 TAPE M LINE1 LINE2 CD TUNER MUTE 24V L 24V L TAPE L L2 L TUNER L MUTE L CD L L1 S GND S L2 S CD S TUNER S TAPE S MUTE S L1 ...

Page 20: ...3 GND 12 P02 6 P01 SDA 7 P00 SCL 8 RES 9 MCT1 83751 IN1 1 IN2 2 IN3 3 O1 18 O2 17 O3 16 O4 15 IN6 6 IN5 5 O5 14 IN7 7 13 10 O7 12 GND 9 IN4 4 IN8 8 O8 11 C 10 U2 ULN2803 RN1H 4K7 RN1G 4K7 RN1F 4K7 RN1E 4K7 RN1D 4K7 RN1C 4K7 RN1B 4K7 1 RN1A 4K7 C36 22U 16V DGND R2 4K7 Q2 BC807 R1 4K7 DGND DGND FL TAPE FL L1 FL L2 FL TUNER FL CD MUTE_LED FL REL 1 2 3 4 5 6 7 8 9 10 10PIN DGND FL ERROR 24VS C23 100N ...

Page 21: ...12 100N MKT capacitor C12 2200U 50V Electrolitic capacitor C12L 100N MKT capacitor C12R 100N MKT capacitor C13 10U 100V Electrolitic capacitor C13 2200U 50V Electrolitic capacitor C13L 220U 63V Electrolitic capacitor C13R 220U 63V Electrolitic capacitor C14 100N MKT capacitor C14 100N MKT capacitor C14 2200U 50V Electrolitic capacitor C14L 100N MKT capacitor C14R 100N MKT capacitor C15 100N MKT ca...

Page 22: ...0N MKT capacitor C22 100N MKT capacitor C22 2200U 50V Electrolitic capacitor C23 100N MKT capacitor C24 100N MKT capacitor C25 100N MKT capacitor C26 100N MKT capacitor C27 68U 6V3 Electrolitic capacitor C28 100N MKT capacitor C29 100N MKT capacitor C2L 220P MKT capacitor C2R 220P MKT capacitor C3 100N MKT capacitor C3 220N MKT capacitor C30 100N MKT capacitor C31 100N MKT capacitor C32 100N MKT c...

Page 23: ...r C9L 100N MKT capacitor C9R 100N MKT capacitor CN 24V Connector CN 40V Connector CN 1 1 Connector CN 1 1 Connector CN 1 18 Connector CN 1 18 Connector CN 1 2 Connector CN 1 2 Connector CN 1 7 Connector CN 1 7 Connector CN 1 8 Connector CN 1 8 Connector CN 1 9 Connector CN 1 9 Connector CN 10 Connector CN 10PIN Connector CN 3 Connector CN 4 Connector CN 5 Connector CN 5 Connector CN 6 Connector CN...

Page 24: ... P4 Connector CN PTC1 Connector CN PTC1 Connector CN PTC2 Connector CN PTC2 Connector CN S CD Connector CN S GND Connector CN S L1 Connector CN S L2 Connector CN S MUTE Connector CN S TAPE Connector CN S TUNER Connector CN V Connector CN V Connector CN V Connector CN V Connector CN V _BEV Connector CN V _BEV Connector D1 1N4148 Diode D1 1N4148 Diode D1 LED LED D10 1N4148 Diode D11 1N4148 Diode D12...

Page 25: ...OUT 1PIN Connector GROEN LEFT Connector IC1 ADM705 IC IC1L CNY17 D Opto coupler IC1R CNY17 D Opto coupler IR1 SFH506 38 IR receiver L1L EE K 021 Coil L1R EE K 021 Coil L2 L1 CINCH MYTH4P Connector M1 1PIN Connector M2 1PIN Connector MCT1 83751 IC NTC1 2 5E 8A NTC ORANJE RIGHT Connector P1 1 ALPS 20K Adj Potmeter P1 2 ALPS 20K Adj Potmeter P1L 200R Adj Potmeter P1R 200R Adj Potmeter P2L 500R Adj Po...

Page 26: ... C1775 Transisor Q17L K1529 FET Q17R K1529 FET Q18L J200 FET Q18R J200 FET Q1L K389 DUAL N JFET Q1R K389 DUAL N JFET Q2 A970 Transisor Q2 BC807 Transisor Q2L C1775 Transisor Q2R C1775 Transisor Q3 A970 Transisor Q3L C1775 Transisor Q3R C1775 Transisor Q4 C2240 Transisor Q4L C1775 Transisor Q4R C1775 Transisor Q5 C2240 Transisor Q5L A970 Transisor Q5R A970 Transisor Q6L A970 Transisor Q6R A970 Tran...

Page 27: ...esistor R14L 15K0 Resistor R14R 15K0 Resistor R15 4K7 Resistor R15L 39R Resistor R15R 39R Resistor R16 4K7 Resistor R16L 56R0 Resistor R16R 56R0 Resistor R17 4K7 Resistor R17L 39R Resistor R17R 39R Resistor R18 33K Resistor R18L 3K3 Resistor R18R 3K3 Resistor R19L 220R Resistor R19R 220R Resistor R1L 475R Resistor R1R 475R Resistor R2 10K Resistor R2 1K Resistor R2 3K3 Resistor R2 475R Resistor R2...

Page 28: ...0R22 Resistor R31R 0R22 Resistor R32L 47R 2W Resistor R32R 47R 2W Resistor R33L 10R 5W Resistor R33R 10R 5W Resistor R34L 10R 5W Resistor R34R 10R 5W Resistor R35L 220R Resistor R35R 220R Resistor R36L 100R Resistor R36R 100R Resistor R37L 100R Resistor R37L 100R Resistor R38L 100R Resistor R38L 100R Resistor R39L 0R22 Resistor R39R 0R22 Resistor R3L 475R Resistor R3R 475R Resistor R4 10K Resistor...

Page 29: ...r R8R 820R Resistor R9L 22R Resistor R9R 22R Resistor REL1 REL16 Relay REL2 REL16 Relay REL3 REL16 Relay REL4 REL16 Relay REL5 REL16 Relay REL6L RELAIS DPDT Relay REL6R RELAIS DPDT Relay RN1 4K7 Resistor array RN1 4K7 Resistor array S1 SWITCH DPST Switch S2 SWITCH DPST Switch S3 SWITCH DPST Switch S4 SWITCH DPST Switch S5 SWITCH DPST Switch S6 SWITCH DPST Switch SW1 115_230 Switch TAPE CINCH MYTH4...

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