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SX-315

34

1

2

3

4

1

2

3

4

C

D

F

A

B

E

 

4.6  FRONT, SW AMP, ST-BY TACT and H/P ASSYS

G I

J

FRONT ASSY

G

ST-BY TACT ASSY

I

H/P ASSY

J

CP306

CN305

CN303

CP305

CP303

CP508

CN508

POWER

TRANSFORMER

A

CN302

CP302

F

CN5

Summary of Contents for SX-315

Page 1: ... 2005 STANDBY ON PHONES AUTO SURROUND STEREO STATION CLASS FM AM TAPE VCR TV INPUT SELECTOR STB DVD DVR DOWN UP MASTER VOLUME AUDIO MULTI CHANNEL RECEIVER DIGITAL SYSTEM SETUP TUNER EDIT CHANNEL LEVEL SOUND MODE OFF ENTER TONE SOUND MODE TUNING SX 315 SX 315 RRV3071 AUDIO MULTI CHANNEL RECEIVER SX 315 THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL S AND TYPE S Model Type Power Requirement Remark...

Page 2: ...ICE Many electrical and mechanical parts in the appliance have special safety related characteristics These are often not evident from visual inspection nor the protection afforded by them necessarily can be obtained by using replacement components rated for voltage wattage etc Replacement parts which have these special safety characteristics are identified in this Service Manual Electrical compon...

Page 3: ...he product Please check that neither solder debris nor screws remain inside the product 8 There should be no semi broken wires scratches melting etc on the coating of the power cord Damaged power cords may lead to fire accidents so please be sure that there are no damages If you find a damaged power cord please exchange it with a suitable one 9 There should be no spark traces or similar marks on t...

Page 4: ...TION and POWER ASSYS 18 3 4 DSP ASSY 20 3 5 CNT1 CNT2 FRONT SW AMP ST BY TACT and H P ASSYS 22 4 PCB CONNECTION DIAGRAM 24 4 1 MAIN ASSY 26 4 2 PROTECTION ASSY 28 4 3 POWER ASSY 29 4 4 DSP ASSY 30 4 5 CNT1 and CNT2 ASSYS 32 4 6 FRONT SW AMP ST BY TACT and H P ASSYS 34 5 PCB PARTS LIST 38 6 ADJUSTMENT 42 6 1 IDLE ADJUSTMENT 42 7 GENERAL INFORMATION 43 7 1 DIAGNOSIS 43 7 1 1 TROUBLE SHOOTING 43 7 1 ...

Page 5: ...0 6 Ω Measured pursuant to the Federal Trade Commission s Trade Regulation rule on Power Output Claims for Amplifiers Measured by audio spectrum analyzer FM Tuner Section Frequency Range 87 5 MHz to 108 MHz Antenna Input DIN 75Ω unbalanced AM Tuner Section Frequency Range 10kHz step 530 kHz to 1 700 kHz Antenna Loop antenna Miscellaneous Power requirements AC 120 V 60Hz Power consumption 200W In s...

Page 6: ... TUNING STATION FM AM TAPE VCR TV CLASS DIGITAL INPUT SELECTOR STB DVD DVR TUNER EDIT SLEEP STATUS DIMMER STANDBY ON MUTE SURROUND ENTER VOLUME STEREO TREBLE Accessories Remote control 1 8300740600010 Dry cell batteries 2 AA IEC R06 Warranty Card Operating Instructions AM loop antenna ATB7013 FM wire antenna ADH7030 ...

Page 7: ...SX 315 7 5 6 7 8 5 6 7 8 C D F A B E ...

Page 8: ...tes the importance of the safety factor of the part Therefore when replacing be sure to use parts of identical designation Screws adjacent to mark on product are used for disassembly For the applying amount of lubricants or glue follow the instructions in this manual In the case of no amount instructions apply as you think it appropriate NOTES 8 7 Packing tape Power cord 10 10 11 9 12 Packing tape...

Page 9: ... Card 5777200140100 IL 3 FM Antenna Assy ADH7030 4 Loop Antenna Assy ATB7013 5 Remote Control Unit 8300740600010 IL 6 Battery Cover VNK4997 NSP 7 Battery G670001R50190 IL 8 Polyethylene Bag SET 6330210019000 IL NSP 9 Polyethylene Bag accessory 6337000240010 IL 10 Pad LR 6230211154000 IL 11 Packing Case 6007210700010 IL 12 Polyethylene Bag 6330210059000 IL ...

Page 10: ...SIDE A C B F H D E Refer to 2 3 FRONT PANEL SECTION 15 33 33 36 36 36 36 36 36 36 36 34 20 37 37 34 34 34 34 34 31 31 32 32 34 37 37 37 37 27 27 37 39 37 37 37 37 37 37 41 35 35 35 34 36 8 12 17 25 7 26 9 24 24 13 6 2 3 1 24 11 24 4 14 18 16 22 22 22 21 29 37 37 37 19 5 10 23 40 42 43 42 42 42 42 43 41 41 43 43 43 28 ...

Page 11: ...07211566000 IL 18 Foot 4000000601010 IL 19 Cushion for Foot 4050211175000 IL NSP 20 Heatsink 2120210778000 IL 21 PCB Spacer 4300210062000 IL 22 Supporter 4070001601010 IL 23 Stopper 4380210002000 IL 24 Clamp Binder 4330040343010 IL 25 Heatsink Bracket L 4010210386000 IL 26 Heatsink Bracket R 4010210396000 IL 27 Bracket 4010210186000 IL 28 Fuse 8A 125V REK1086 29 Cushion 4050211205000 IL 30 31 Scre...

Page 12: ... 3 4 1 2 3 4 C D F A B E 2 3 FRONT PANEL SECTION CONTACT SIDE NON CONTACT SIDE G I J 1 To CNT2 CP302 12 16 14 14 17 17 17 17 17 17 17 17 17 10 11 11 11 2 3 9 4 5 7 8 6 13 15 To CNT1 CP301 Nut Accessory of FRONT Assy ...

Page 13: ...nt Panel 3067212041000 IL 5 Pioneer Badge VAM1129 6 Spring 3720210276000 IL 7 Window 5070212073000 IL 8 Knob 5087211121000 IL 9 SB Button 5097212581000 IL 10 FUNC Button 5097212591000 IL 11 SU Button 5097212601000 IL 12 SL Button 5097212611000 IL 13 Cushion for Foot 4050211175000 IL 14 Bracket L R 4010211986000 IL NSP 15 Energy Star Label AAX8022 16 Screw 1500001456010 IL 17 Screw BBZ30P080FTC ...

Page 14: ...SX 315 14 1 2 3 4 1 2 3 4 C D F A B E 3 BLOCK DIAGRAM AND SCHEMATIC DIAGRAM 3 1 BLOCK DIAGRAM ...

Page 15: ...SX 315 15 5 6 7 8 5 6 7 8 C D F A B E 7809 ...

Page 16: ...on some component parts indicates the importance of the safety factor of the part Therefore when replacing be sure to use parts of identical designation The power supply is shown with the marked box PROTECTION ASSY 7028063504010 IL B POWER ASSY 7028063521010 IL C ST BY TACT ASSY 7028063506010 IL I H P ASSY 7028063505010 IL J POWER TRANSFORMER 8200858630180 IL POWER CORD L068040250010 IL ...

Page 17: ...5 6 7 8 C D F A B E MAIN ASSY 7028063491010 IL A SW AMP ASSY 7028063503010 IL H FRONT ASSY 7028063501010 IL G DSP ASSY 7028063511010 IL FM AM TUNER UNIT AXX7172 D CNT1 ASSY 7028063492010 IL E CNT2 ASSY 7028063502010 IL F ...

Page 18: ...2 3 4 1 2 3 4 C D F A B E 3 3 MAIN PROTECTION and POWER ASSYS A MAIN ASSY 7028063491010 IL A CN501 F CP502 H CP503 H Refer to 6 1 IDLE ADJUSTMENT FL FL FL FL FL FL FL SL SL SL SL SL C C C C C C SW SW SW SW SW SW SW ...

Page 19: ...TRANSFORMER POWER CORD J 8A 125V NOTE FOR FUSE REPLACEMENT FOR CONTINUED PROTECTION AGAINST RISK OF FIRE REPLACE WITH SAME TYPE AND RATINGS ONLY CAUTION FL AUDIO SIGNAL ROUTE Front L ch FL FL FL SL AUDIO SIGNAL ROUTE Surround L ch SL SL SL SL SL C AUDIO SIGNAL ROUTE Center ch C C C C C SW C SW SW AUDIO SIGNAL ROUTE SubWoofer ch SW SW SW SW PL AUDIO SIGNAL ROUTE Phones L ch PL PL ...

Page 20: ...SX 315 20 1 2 3 4 1 2 3 4 C D F A B E 3 4 DSP ASSY D DSP ASSY 7028063511010 IL D CP1 E Digital Audio Decoder Multiplexer D D D D D D D D AD AD AD AD AD AD AD AD AD AD FL SL C SW FL SL C SW ...

Page 21: ...ch SL AUDIO SIGNAL ROUTE Surround L ch C AUDIO SIGNAL ROUTE Center ch SW AUDIO SIGNAL ROUTE SubWoofer ch AUDIO SIGNAL ROUTE L ch D AUDIO SIGNAL ROUTE Digital AD AUDIO DATA SIGNAL ROUTE D AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD FL FL FL FL SL SL SL C C C C SW SW SW ...

Page 22: ...3 5 CNT1 CNT2 FRONT SW AMP ST BY TACT and H P ASSYS E F G H CNT1 ASSY 7028063492010 IL E CNT2 ASSY 7028063502010 IL F FM AM TUNER UNIT CN2 D CN1 D CP504 A CP501 A CN503 A CN502 A SW SW SW SW SW FL FL SL SL C C SW SW SW FL FL SL SL C C SW SW ...

Page 23: ...L ch SL AUDIO SIGNAL ROUTE Surround L ch C AUDIO SIGNAL ROUTE Center ch SW AUDIO SIGNAL ROUTE SubWoofer ch PL AUDIO SIGNAL ROUTE Phones L ch PL PL SW SW SW SW SW302 SYS_SETUP SW303 TU_EDIT SW304 CH LEVEL SW305 SW306 SW307 ENTER SW309 AUTO SW310 SURROUND SW311 STEREO SW312 TU_UP SW313 TU_DOWN SW314 S OFF SW315 SOUND SW316 TONE SW317 STATION SW318 STATION SW319 CLASS SW308 AM FM SW320 TAPE VCR SW321...

Page 24: ...ns are not provided for each transistor on the PC board the following indications are provided on a blank space of the board 3 The parts mounted on this PCB include all necessary parts for several destinations For further information for respective destinations be sure to check with the schematic diagram 4 View point of PCB diagrams Symbol In PCB Diagrams Symbol In Schematic Diagrams Part Name 3 t...

Page 25: ...SX 315 25 5 6 7 8 5 6 7 8 C D F A B E ...

Page 26: ...4 CN501 F CP501 CP502 H CN502 CN510 B CP510 CN505 C CP505 POW TRA VR501 VR504 VR505 Q546 Q544 Q543 Q545 Q541 Q510 Q505 Q507 Q503 Q521 Q517 Q519 Q530 Q526 Q528 Q539 Q537 Q538 Q523 Q532 Q516 Q536 Q534 Q533 Q548 Q547 Q550 Q549 Q513 Q51 Q553 Q509 Q511 Q535 Q512 Q514 Q541 CP5 A SIDE A ...

Page 27: ... 6 7 8 C D F A B E MAIN ASSY A CP508 J CN508 CN505 CP505 CP503 H CN503 POWER TRANSFORMER VR503 VR502 Q537 Q538 Q529 Q525 Q527 Q522 Q518 Q520 Q502 Q513 Q504 Q506 Q508 Q515 Q540 Q531 Q552 Q551 Q524 Q509 Q511 CP506 A SIDE A ...

Page 28: ...SX 315 28 1 2 3 4 1 2 3 4 C D F A B E 4 2 PROTECTION ASSY PROTECTION ASSY B CP509 Q1203 Q1204 Q1202 Q1201 Q1205 Q1206 Q1207 Q1209 Q1210 Q1211 Q1208 A CN509 CP510 A CN510 B SIDE A SIDE A ...

Page 29: ...SX 315 29 5 6 7 8 5 6 7 8 C D F A B E 4 3 POWER ASSY POWER ASSY C AC IN POWER TRANSFORMER POWER TRANSFORMER CP802 CP801 CP803 CN505 CP505 Q802 IC803 IC804 Q801 IC805 IC806 IC802 A C SIDE A SIDE A ...

Page 30: ...SX 315 30 1 2 3 4 1 2 3 4 C D F A B E 4 4 DSP ASSY D DSP ASSY D CN2 CP2 E CN1 CP1 IC4 IC5 IC2 IC12 IC13 IC14 IC7 IC6 IC15 IC16 Q9 Q10 Q8 IC3 IC8 E SIDE A ...

Page 31: ...SX 315 31 5 6 7 8 5 6 7 8 C D F A B E D DSP ASSY D CN2 CN1 IC1 Q6 Q5 Q4 Q3 Q1 Q2 SIDE B ...

Page 32: ...SX 315 32 1 2 3 4 1 2 3 4 C D F A B E 4 5 CNT1 and CNT2 ASSYS E F CNT1 ASSY E CNT2 ASSY F CP902 CP302 CN302 G CN504 CP504 A CN501 CP501 A CP301 CN301 G SIDE A ...

Page 33: ...SX 315 33 5 6 7 8 5 6 7 8 C D F A B E E F CP903 CN902 FM AM TUNER UNIT Q904 Q903 Q902 Q905 IC901 Q901 CP2 CN2 D CP1 CN1 D SIDE A ...

Page 34: ...315 34 1 2 3 4 1 2 3 4 C D F A B E 4 6 FRONT SW AMP ST BY TACT and H P ASSYS G I J FRONT ASSY G ST BY TACT ASSY I H P ASSY J CP306 CN305 CN303 CP305 CP303 CP508 CN508 POWER TRANSFORMER A CN302 CP302 F CN5 ...

Page 35: ...SX 315 35 5 6 7 8 5 6 7 8 C D F A B E G H SW AMP ASSY H CP502 CN502 A CN301 CP301 Q206 Q205 Q207 Q208 Q201 Q203 Q202 Q204 VR201 E CP503 CN503 A ...

Page 36: ...SX 315 36 1 2 3 4 1 2 3 4 C D F A B E G FRONT ASSY G CN301 Q301 Q302 IC302 IC301 SIDE B ...

Page 37: ...SX 315 37 5 6 7 8 5 6 7 8 C D F A B E G CP306 CN305 CN303 CN302 C301 Q303 Q304 SIDE B ...

Page 38: ... FL 1 V XTAL 1 X CJ 1 R2000 R2999 The last three digits are identical JR 1 R3000 R3999 The last three digits are identical GND 1 No Ref Nos JK 1 JA2000 JA2999 The last three digits are identical OPT 1 JA3000 JA3999 The last three digits are identical CB 1 L2000 L2999 The last three digits are identical Mark No Description Part No LIST OF ASSEMBLIES NSP 1 MAIN BOARD ASSY 7025HK0409010 IL 2 MAIN ASS...

Page 39: ...TOR L101100041410 IL CN501 PCB CONNECTOR L101100041710 IL CN505 PCB CONNECTOR L101220100000 IL CN551 CN555 PCB CONNECTOR L101530140310 IL CN506 PCB CONNECTOR L104353280300 IL BPROTECTION ASSY SEMICONDUCTORS Q1201 J5001266Y0050 IL Q1203 Q1206 Q1209 J5001268B0050 IL Q1202 Q1204 Q1205 Q1207 Q1208 J5023198Y0000 IL Q1210 Q1211 J5023198Y0000 IL D1201 D1203 1SS133 Mark No Description Part No D2201 MTZJ7R...

Page 40: ...0 C22 C23 C30 C32 C49 CEAT470M16 C74 CEAT470M16 C125 C35 C36 CEATR10M50 C16 C18 CFTLA153J2A C15 C17 CFTLA473J2A C13 C14 CFTLA563J2A C68 CKSRYB102K50 Mark No Description Part No C91 C92 C105 C119 C120 CKSRYB102K50 C128 C132 C37 C38 C62 CKSRYB103K50 C71 C75 CKSRYB103K50 C109 C110 C123 C124 C19 CKSRYB104K50 C24 C25 C28 C31 CKSRYB104K50 C41 C42 C46 C53 C55 CKSRYB104K50 C58 C61 C64 C66 C73 CKSRYB104K50...

Page 41: ...01 CONNECTOR L131102000010 IL 0 HOLDER 4320210416000 IL 3301 1P WIRE LUGPIN 8410800010100 IL HSW AMP ASSY SEMICONDUCTORS Q202 Q203 J5000992F0050 IL Q207 J5011560Y0000 IL Q204 Q208 J5021845F0000 IL Q201 J502287400010 IL Q206 J5032390Y0000 IL Mark No Description Part No Q205 J503947F00000 IL D201 1SS133 COILS AND FILTERS L201 D330R50000000 IL CAPACITORS C202 C213 CEAT100M50 C212 CEAT101M10 C201 CEAT...

Page 42: ...t point TP1 TP6 3 Turn on the power and perform aging for more than one minute 4 Slowly turn the adjustment VR clockwise so that the voltage becomes in the range of 2 5mV 0 5mV Adjustment Name Adjustment VR Measurement Points Front L ch VR501 MAIN Assy TP1 R621 Front R ch VR502 MAIN Assy TP2 R622 Surround L ch VR503 MAIN Assy TP3 R643 Surround R ch VR504 MAIN Assy TP4 R644 Center ch VR505 MAIN Ass...

Page 43: ...peaker Relay OFF The unit immediately enters Standby mode Recovery method Press the STANDBY key twice When the DC detection circuit is not normal When the overcurrent detection circuit is not normal BD501 and BD502 are in failure or their peripheral circuits are short circuited Power amp section is in failure Protection circuit is in failure Microcomputer is in failure pin 7 protection Power amp s...

Page 44: ...lure short circuited Are R801 and R802 0 22Ω 1W open circuited Yes D801 and D802 are in failure IC801 is in failure Short circuiting of these peripheral circuits Are R803 and R804 0 22Ω 1W open circuited Yes D803 D806 are in failure IC802 and IC803 are in failure Short circuiting of these peripheral circuits Does IC806 ICP N15 open circuited Yes IC805 is in failure or its peripheral circuits are s...

Page 45: ...6 7 8 5 6 7 8 C D F A B E 7 1 2 PCB LOCATION POWER ASSY C MAIN ASSY A DSP ASSY D CNT1 ASSY E CNT2 ASSY F PROTECTION ASSY B FRONT ASSY G ST BY TACT ASSY I H P ASSY POWER TRANSFORMER J FM AM TUNER UNIT SW AMP ASSY H ...

Page 46: ... A55 46 PD1 A54 47 PD2 A53 48 PD3 A52 49 PD4 A51 50 A21 80 A22 79 A23 78 PH7 A24 77 PH6 A25 76 PH5 A26 75 PH4 A27 74 PH3 A28 73 PH2 A29 72 PH1 A30 71 PH0 A31 70 PG7 A32 69 PG6 A33 68 PG5 A34 67 PG4 A35 66 PG3 A36 65 PG2 A37 64 PG1 A38 63 PG0 A39 62 PF7 A40 61 PF6 A41 60 PF5 A42 59 PF4 A43 58 PF3 A44 57 PF2 A45 56 PF1 A46 55 PF0 A47 54 PD7 A48 53 PD6 A49 52 PD5 A50 51 G2 A2 100 G3 A3 99 G4 A4 98 G5...

Page 47: ... signal for communication with DIR DAC 26 PB6 SI1 4588_PDN O Power down signal for DIR DAC 27 PB7 SO1 HP_DET I HP Detect 28 PI0 5V Vdd connection Connect to Vdd at no use 29 PA0 AN0 M61540_CLK O Clock signal for VOLUME IC 30 PA1 AN1 M61540_DT O Data output signal for VOLUME IC 31 PA2 AN2 OPTION I OPTION 32 PA3 AN3 KEY1 I KEY1 33 PA4 AN4 KEY2 I KEY2 34 PA5 AN5 KEY3 I KEY3 35 PA6 AN6 EEPROM_CLK O Cl...

Page 48: ...A32 SURR_MUTE O SURR_MUTE control 70 PH0 A31 P20 O Display 71 PH1 A30 P19 O Display 72 PH2 A29 P18 O Display 73 PH3 A28 P17 O Display 74 PH4 A27 P16 O Display 75 PH5 A26 P15 O Display 76 PH6 A25 P14 O Display 77 PH7 A24 P13 O Display 78 A23 P12 O Display 79 A22 P11 O Display 80 A21 P10 O Display 81 A20 P9 O Display 82 A19 P8 O Display 83 A18 P7 O Display 84 A17 P6 O Display 85 A16 P5 O Display 86 ...

Page 49: ...dec with DIR Pin Arrangement Top view Block Diagram XTO 6 XTI 7 RX0 MCKO1 57 10 MCKO2 9 RX1 59 RX2 61 RX3 63 RX4 67 RX5 69 RX6 71 RX7 73 TX0 78 TX1 79 VIN 76 BOUT 2 COUT 11 UOUT 12 VOUT 13 LRCK2 16 BICK2 15 SDTO2 14 DAUX2 75 CSN 23 I2C 74 CCLK SCL 21 LOUT1 47 CDTO 20 SDTO1 17 CDTI SDA 22 BICK1 18 DAUX1 24 LRCK1 19 MCLK 77 PDN 31 INT0 80 INT1 1 AVDD 55 AVSS 56 DVDD 4 DVSS 5 TVDD 3 Clock Generator X...

Page 50: ...0 GPIO0 I O Pin17 18 CS I Host Parallel Chip Select Host Serial SPI Chip Select 19 SCDIO SCDOUT PSEL GPIO9 O Serial Control Port Data Input and Output Parallel Port Type Select 20 ABOOT INTREQ I O Control Por Interrupt Request Automatic Boot Enable 21 EXTMEM GPIO8 I O External Memory Chip Select or General Purpose Input Output Number 8 22 SDATAN1 I PCM Audio Data Input Number One 23 VD3 Digital Po...

Page 51: ... W EMOE GPIO11 19 WR DS EMWR GPIO10 20 AUDATA3 XMT958 21 DGND1 22 VD1 23 MCLK 24 SCLK 25 LRCLK 26 AUDATA0 27 AUDATA1 CS SCDIO SCDOUT PSEL GPIO9 ABOOT INTREQ EXTMEM GPIO8 SDATAN1 VD3 DGND3 SCLKN1 STCCLK2 LRCLKN1 CMPDAT SDATAN2 RCV958 CMPCLK SCLKN2 28 6 5 4 3 2 1 44 43 42 41 40 AUDATA2 DC DD RESET AGND VA FILT1 FILT2 CLKSEL CLKIN CMPREQ LRCLKN2 39 38 37 36 35 34 33 32 31 30 29 CS493264CLZ DSP ASSY I...

Page 52: ...0 GPIO0 I O Pin17 18 CS I Host Parallel Chip Select Host Serial SPI Chip Select 19 SCDIO SCDOUT PSEL GPIO9 O Serial Control Port Data Input and Output Parallel Port Type Select 20 ABOOT INTREQ I O Control Por Interrupt Request Automatic Boot Enable 21 EXTMEM GPIO8 I O External Memory Chip Select or General Purpose Input Output Number 8 22 SDATAN1 I PCM Audio Data Input Number One 23 VD3 Digital Po...

Page 53: ...s the System Setup menu TUNER EDIT Use to memorize and name a station for recall using the STATION buttons CH LEVEL Press to set up the channel levels for surround sound 8 and ENTER Use to navigate menus and change settings 9 TUNING Use to tune to radio stations 10 Listening mode buttons SOUND MODE OFF Press to turn off the current Sound mode SOUND MODE Press to select a Sound mode TONE Press to a...

Page 54: ...ghts when a stereo FM broadcast is being received in auto stereo mode Lights when the mono mode is set using the MPXbutton Lights when a broadcast is being received 4 D Lights when the receiver is decoding a Dolby Digital signal PL II Lights when the receiver is using Dolby Pro Logic II decoding 5 Character display 6 TONE Lights when the receiver is in tone mode SOUND Lights when the receiver is i...

Page 55: ...B Press to select the STB set top box input for cable satellite receivers etc DVD DVR Press to select the DVD player recorder input FM AM Press to select the FM or AM band for the built in tuner TAPE VCR Press to select the analog tape VCR input TV Press to select the TV audio input 8 CLASS Switches between the three banks classes of radio station presets 9 Radio tuning controls TUNING Use to manu...

Page 56: ... source material SURROUND Press to switch between the various Pro Logic II and other listening mode options STEREO Switches to stereo playback using only the front left and right speakers OFF Switches off the Sound mode SOUND Press to select a Sound mode TONE Use in conjuction with the BASS and TREBLE buttons below MPX Switches between stereo and mono reception of FM broadcasts If the signal is we...

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