Korg Volca Bass Service Manual Download Page 14 | Manualshive

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7. Sound check (In a state in which the user uses)

The display will indicate ""oFF"" when you hold down the power button.
Please release it appears.
Touching the "M4" of touch pad, sound comes out from the amplifier. Please check the waveform on

an oscilloscope.

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Summary of Contents for Volca Bass

Page 1: ... ch hi in ne e v vo ol lc ca a b ba as ss s v vo ol lc ca a b ba as ss s S SE ER RV VI IC CE E M MA AN NU UA AL L TABLE OF CONTENTS ASSEMBLY SKETCH HOOKUP 2 BLOCK DIAGRAM 3 SCHEMATIC DIAGRAM 4 TEST MODE 8 PARTS LIST 23 Issued Sep 23 2013 Ver 1 0 2013 KORG INC ...

Page 2: ...6 1 10 9 13 14 11 12 7 4 2 8 ...

Page 3: ...A 24LQXI TMPM330 TPA6111A2DR TATSUYA TAKAHASHI KENICHI NAKAMURA X 12210 BLOCK DIAGRAM 2013 03 06 KOD B30131 Buck converter battery voltage detect power control not included SYNC INTERFACE MIDI INTERFACE MCU HP out SYNC MIDI IN in out VOLUME 2 pole butterworth pitch3 pitch2 pitch1 cutoﬀ cutoﬀ AA x6 KA350 PWR SW LED x12 VR x10 VCF 700S VCA 2 7 10 2 I O I O I O I O I O PWM I O I O I O INT INT INT RES...

Page 4: ...30 PILED33101 PILED33102 COLED331 PILED33201 PILED33202 COLED332 PILED33301 PILED33302 COLED333 PILED33401 PILED33402 COLED334 PILED33501 PILED33502 COLED335 PILED33601 PILED33602 COLED336 PILED33701 PILED33702 COLED337 PILED33801 PILED33802 COLED338 PILED33901 PILED33902 COLED339 PIR30001 PIR30002 COR300 PIR30101 PIR30102 COR301 PIR30201 PIR30202 COR302 PIR30301 PIR30302 COR303 PIR30401 PIR30402 ...

Page 5: ...PIR6102 COR61 PIR6201 PIR6202 COR62 PIR6301 PIR6302 COR63 PIR6401 PIR6402 COR64 PIR6501 PIR6502 COR65 PIR6601 PIR6602 COR66 PIR6701 PIR6702 COR67 PIR6801 PIR6802 COR68 PIR6901 PIR6902 COR69 PIR7001 PIR7002 COR70 PIR7101 PIR7102 COR71 PIR7201 PIR7202 COR72 PIR7301 PIR7302 COR73 PIR7401 PIR7402 COR74 PIR7501 PIR7502 COR75 PIR7601 PIR7602 COR76 PIR7701 PIR7702 COR77 PIR7801 PIR7802 COR78 PIR7901 PIR7...

Page 6: ...IC4025 PIIC4026 PIIC4027 PIIC4028 PIIC4029 PIIC4030 PIIC4031 PIIC4032 PIIC4033 PIIC4034 PIIC4035 PIIC4036 PIIC4037 PIIC4038 PIIC4039 PIIC4040 PIIC4041 PIIC4042 PIIC4043 PIIC4044 PIIC4045 PIIC4046 PIIC4047 PIIC4048 PIIC4049 PIIC4050 PIIC4051 PIIC4052 PIIC4053 PIIC4054 PIIC4055 PIIC4056 PIIC4057 PIIC4058 PIIC4059 PIIC4060 PIIC4061 PIIC4062 PIIC4063 PIIC4064 PIIC4065 PIIC4066 PIIC4067 PIIC4068 PIIC40...

Page 7: ...PIIC1607 COIC16A PIIC1603 PIIC1604 PIIC1605 PIIC1608 COIC16B PIIC1801 PIIC1802 PIIC1803 PIIC1804 PIIC1805 PIIC1806 PIIC1807 PIIC1808 PIIC1809 COIC18 PIL101 PIL102 COL1 PIL201 PIL202 PIL203 PIL204 COL2 PIL301 PIL302 COL3 PIL401 PIL402 COL4 PIL501 PIL502 COL5 PIL601 PIL602 COL6 PIL701 PIL702 COL7 PIL801 PIL802 COL8 PIMIDI101 PIMIDI102 PIMIDI103 COMIDI1 PIPC101 PIPC102 PIPC103 PIPC104 PIPC105 COPC1 P...

Page 8: ...se equipment SYNC TEST JIG see schematic bellow Oscilloscope Amp speaker AC Adaptor KA350 Battery LR6 x6 MIDI control Keyboard AC Adaptor USB 5V 500mA MIDI cable CH 1 CH 2 GND 1 2 A B OSCILOSCOPE AMP SPEAKER SYNC TEST JIG ...

Page 9: ... Rotary switch check 1 3 3 AD and knob inspection 4 4 Synchronization function inspection 5 5 Audio check 1 6 6 Audio PCB inspection 1 7 7 Battery inspection 1 8 8 Checking the tuner function 1 14 14 Electrostatic sensor display 1 15 15 Power off test 1 1 This test is not required Test Mode Operation Operation in the test execution state state VCO1 VCO3 button Exiting the test running and return t...

Page 10: ...roducts as shown in the following figure PEAK CUTOFF VOLUME min MAX MAX Turn on the power while holding down the Play and Rec button Release the button after displaying tESt in 7segLED 3 Internal inspection inspection No 0 The following checks are executed 1 Pin check inspection 2 ROM check sum 3 Panel check sum 4 Self tuning inspection Proceed to the next inspection automatically if the inspectio...

Page 11: ...hat the LED is lit all Make sure that there is no not light LED the brightness of LED is uniform and there is no difference in color tone knob 7seg Red Button Battery Yellow Rear LED x4 Red Proceed to the next inspection by pushing FUNC button if the inspection passed 4 3 LED and button check Following table is the order of inspection Please press the button on the cell to the right of the lit LED...

Page 12: ...s different from the target Please refer to the list of errors at the end of the test mode description about the error contents 4 5 Inspection sequential lighting touch switch LED LED touch switch lights in order Make sure to light in order one by one If you touch to the right edge make sure that the LED of the touch switch is lit one by one in order Repeat from the beginning it is lit until the e...

Page 13: ...nspection number 4 Make sure the following points please start the inspection The Sync Cable is not connected Setting the sync test jig is set to 1 1 In a state where cable is not connected SYNC IN terminal is checked If it detects connecting cable the result is NG It is displayed as 4 2 in the 7 segment in the case of a pass It change stand by state and NG state is displayed 2 Connect the sync Ca...

Page 14: ...e in which the user uses The display will indicate oFF when you hold down the power button Please release it appears Touching the M4 of touch pad sound comes out from the amplifier Please check the waveform on an oscilloscope ...

Page 15: ...MIN as follows CUTOFF knob Touching the M4 of touch pad sound comes out from the amplifier Please check the waveform on an oscilloscope There is no sound from the speakers and waveform does not appear to oscilloscope ...

Page 16: ...Turn CUTOFF knob and PEARK knob to MAX position Touching the M4 of touch pad sound comes out from the amplifier Please check the waveform on an oscilloscope ...

Page 17: ...Turn CUTOFF knob and PEARK knob to MID position Touching the M4 of touch pad sound comes out from the amplifier Please check the waveform on an oscilloscope ...

Page 18: ...MIDI CONTOROL KEYBOARD initialize setting Setting OSCILOSCOPE AMP SPEAKER CH 1 CH 2 GND ...

Page 19: ...by pressing the power button Push PLAY button to start DEMO Make sure that the DEMO performance is sounding from the speakers Connect the headphones make sure that the sound from the speakers disappear Make sure that the sound is coming from both sides of the headphones If there is no problem turn off the power by pressing the power button Set to ship setting the knobs remove the batteries test is...

Page 20: ...is displayed on the seven segment the main ROM checksum error A 2 If 10FE is displayed on the seven segment the panel ROM checksum error A 3 If 10FF is displayed on the seven segment self tuning error Please check the PIN 38 39 40 42 48 49 52 53 58 etc CPU where relevant B Case except A 7 segment 10 display indicates the pin that detected the anomaly 7 segment 20 display indicates the abnormal cau...

Page 21: ...M2 0d touch 14 02 touch M3 0E touch 15 03 touch M4 0F touch 16 04 touch M5 10 rubber MEMORY 05 touch M6 11 rubber STEP 06 touch M7 12 rubber PLAY 07 touch M8 13 rubber REC 08 touch 9 14 rubber VCO1 09 touch 10 15 rubber VCO2 0A touch 11 16 rubber VCO3 0b touch 12 17 rubber FUNC Error Display List of A D knob inspection inspection number 3 A If 108 is displayed on the seven segment It is error valu...

Page 22: ...and SYNC OUT terminal and 2 85 86 87 CPU PIN interrupt Error number table is shown below 7segment Display 100 error contents 7segment Display 20 1001 Connecting to SyncIn terminal is detected at the time of entering the test 1002 Change of A D except terminal of SyncIn is detected Interference A D number Please refer to the table number A D of knob inspection 1003 An error has occurred in the loop...

Page 23: ...KLM 3201 KLM 3201 TOP IC1 IC2 2 510320516176 POWER AMP IC TPA2006D1DRBR KLM 3201 KLM 3201 TOP IC18 1 510320520029 PHOTO COUPLER PS9117A F3 AX M KLM 3201 KLM 3201 TOP PC1 1 510335522028 CRYSTAL RSD 10000F202000 KLM 3201 KLM 3201 TOP X1 1 510360525003 ROTARY VR XV09211YNPV25U NC 1B10K KLM 3201 KLM 3201 TOP VR3 VR5 VR7 VR8 VR10 VR11 VR12 7 510360525009 ROTARY VR XV09223NPV25F1B10K KLM 3201 KLM 3201 T...

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