Roland ep-77 Service Notes Download | Manualshive

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View from component side

View from component side

RIGHT CONTACT PCB ASSY w/RUBBER

ASSY 7695004000

LEFT CONTACT PCB ASSY w/RUBBER

ASSY 7695005000

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EP-77

Dec, 1999

CIRCUIT DIAGRAM (LEFT CONT.PCB ASSY)

CIRCUIT DIAGRAM (RIGHT CONT.PCB ASSY)

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Summary of Contents for ep-77

Page 1: ...RATED POWER OUTPUT 5W x 2 SPEAKERS 12cm x 2 CONNECTORS Output Jacks L Mono R Input Jacks L Mono R Pedal connector x 2 Damper Soft Headphone Jack x 2 Stereo MIDI In Connector MIDI Out Connector POWER SUPPLY ACO 12V 1A AC Adaptor POWER CONSUMPTION 1000mA DIMENSIONS 1138 W x 339 D x 108 H mm without music stand 1144 W x 370 D x 767 H mm with music stand WEIGHTS 10 5 Kg without music stand 19 4 Kg wit...

Page 2: ...in Max Volume Power Tempo Metronome Beat 0 40 60 80 96 108 208 192 168 144 120 2 3 4 6 å ñ öë 2 BUTTON GROUP 8 x 8 TRASPARENT 2 BUTTON GROUP 8 x 8 TRASPARENT BLACK KNOB W IVORY POINTER BLACK KNOB W IVORY POINTER LED DIODE TLHG4401 GREEN Cod 15029320RI LED DIODE TLHR4401 RED Cod 15029284RI LED SPR 325 MVWT31 Cod 01121689 POWER SWITCH KNOB N 001 BLACK 5P DIN SOCKET YKF51 5054 2PCS JACK SOCKET HLJ710...

Page 3: ...R PL 45 SHORT 12 7697607000 76 KEYBOARD ASSY TP 9P 13 14 SPEAKER 4 OHM 120 20B FX FELT WASHER I D 7 E D 13 TH 1 5 K2418103 K2248150 7711505000 JACK PCB ASSY K2268156 K2248125 7711502000 ANTIDUST COVER PL 45 GRILL F LOUDSPEAKER CONTROL PCB ASSY A A B B B C C C G C D E F A B C D E F G J2289112 J2289115 J2289108 J2289125 J2139102 J2289102 J2289113 SCREW SCREW 3 5x13 TCTC H 8 BRUN SCREW 3 5x9 5 TC PR ...

Page 4: ...TH RUBBER CONTACTS PARTS NUMBER n J2179101 76 6 6 6 7 6 6 6 1 1 31 42 7 1 1 1 76 76 1 J2579112 J2579113 J2579114 J2579115 J2579116 J2579117 J2579118 J2579119 J2579121 J2579193 J2289104 2218523802 7695005000 7695004000 J2589101 J2359104 22158789 7625920000 1 2 3 8 10 9 PM SM 5 7 6 4 CONTACT BOARDS ARE COMPLETE WITH RUBBER CONTACTS SOL MI 76 KEY KEYBOARD WEIGHTED TP9 P 12 P RUBBER CONTACT C C B B A ...

Page 5: ...01 on CB J3439146 11P MALE CONNECTOR P 2 M CN8 on MB CN1 on JB J3439148 7P MALE CONNECTOR P 2 M CN2 on MB CN2 on JB CN5 on PB J3439171 4P MALE CONNECTOR 90 P 2 M CN103 on BTB PARTS LIST EP 77 117V 230V 230VE When ordering any parts listed in the parts list please specify the following items in the order sheet QTY PART NUMBER DESCRIPTION MODEL NUMBER Ex 10 22575241 Sharp Key C 20 50 15 2247017300 K...

Page 6: ...K2678105 CARTENE ENVELOPE HD 140X57 1 K2678106 POLYETH ENVELOPE 4OX55 1 K2618213 OUTER PACKING EP 77 1 MISCELLANEOUS K2268128 RED FELT MM 1250X7X1 1 K2268156 ANTIDUST COVER PL45 EP 77 97 1 K2268157 VIBRATION DAMPER PL45 SHORT EP77 97 1 K2248150 FELT WASHER I D 7 E D 13 TH 1 5 3 1342982301 POWER SUPPLY SOCKET HOLDER N 2 1 J2139102 TOOTHED WASHER I D 3 2 K2168102 SPACER FOR LED H 2 8 D E 5 5 5 K2168...

Page 7: ...D D A DATA LOUT ROUT LPF CONTROL BOARD MAIN BOARD T MK BK MIDI IN MIDI OUT L M R OUTPUT R L IC4 RESET JACK BOARD IC5 IC7 IC10 IC6 IC14 IC9 IC12 IC16 IC18 IC17 A A MASTER VOLUME PHOTO BUFFER Q1 IC2 76 KEY KEYBOARD ASSY PS RAM RAS UCAS WE RAS CAS EWE IC5 POWER IC6 Q7 SWITCH DCIN 12V 1A POWER SUPPLY DAMPER SOFT JK2 JK3 INPUT L MONO R AMPL JK5 JK4 EQ IC7 MUTE CONTROL MUTE MUTE Q2 Q3 A Q4 Q5 Q8 IC3A BR...

Page 8: ...ASSY 7711505000 View from component side View from component side JK9 YKB21 5078 1 2 3 4 5 6 7 8 9 JK10 YKB21 5078 1 2 3 4 5 6 7 8 9 C6 100 16 2 1 C7 100 16 2 1 C1 100 16 2 1 C2 100 16 2 1 R1 100I R2 100I R5 100I R4 100I R12 100I R13 100I R16 100I R15 100I L6 L4 L1 C10 100nFC L2 CN5 53014 0710 1 1 2 2 3 3 4 4 5 5 6 6 7 7 To JACK AMP BOARD CN3 L SEND H L SEND H R SEND H R SEND H AGND L SPK L SPK PH...

Page 9: ... 5 9 C69 100nFC Q4 DTC114ES 3 1 2 C53 100 16 2 1 R63 3K3 R60 100 R61 10K D14 1SS133 1 2 Q5 DTC114ES 3 1 2 R62 10K Q8 2SC1815GR 3 1 2 R64 68K JK6 HLJ7101 01 3010 1 2 4 C12 330pF C15 330pF C11 3 3 16 2 1 R18 820 C14 3 3 16 2 1 R24 820 R20 68K R27 68K R21 1K R28 1K R19 680 R25 680 Q2 2SC2878A 3 1 2 Q3 2SC2878A 3 1 2 JK7 HLJ7101 01 3010 1 2 4 L7 FBR07HA850TB 00 L9 FBR07HA850TB 00 L11 FBR07HA850TB 00 J...

Page 10: ...RAM ASSY 7711503000 MAIN PCB ASSY ASSY 7711501000 E View from component side C110 100nF C109 100nF R114 68K R113 100 R109 1K5 R110 1K5 R111 1K5 R112 1K5 C108 0 33 63 R115 1K CN103 53015 0410 3 4 2 1 VR101 RK11K1140 4 1 2 3 SW116 SRBV15 F0820 11 1 10 2 3 4 5 6 7 8 9 VREF AD BEAT AD TEMPO To CN4 Main Board TEMPO BEAT X X X X X X View from component side View from solder side ...

Page 11: ...1 12 43 14 2 33 44 29 27 25 22 20 18 16 30 28 26 24 21 19 17 15 1 23 13 32 A17 A16 A15 A14 A13 A12 A11 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 DQ15 CE WE OE WP BYTE RP DQ14 DQ13 DQ12 DQ11 DQ10 DQ9 DQ8 DQ7 DQ6 DQ5 DQ4 DQ3 DQ2 DQ1 DQ0 VPP VCC VSS VSS R32 100 R30 10 R27 NIU IC8 PQ3DZ53 1 2 3 4 5 IN OFF OUT NC GND C16 10 16 C15 0 1 IC9 TC203C180AF XP6 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22...

Page 12: ...104 RN2227 3 2 1 Q105 RN2227 3 2 1 D101 1N4148 1 2 D102 1N4148 1 2 D103 1N4148 1 2 D104 1N4148 1 2 D105 1N4148 1 2 D106 1N4148 1 2 D110 1N4148 1 2 D108 1N4148 1 2 D109 1N4148 1 2 D107 1N4148 1 2 D111 1N4148 1 2 D112 1N4148 1 2 D113 1N4148 1 2 D114 1N4148 1 2 R105 1K R104 1K D115 1N4148 1 2 LED106 1 2 LED107 SPR 325MVW 1 2 3 LED105 1 2 LED104 1 2 LED103 1 2 LED102 1 2 C106 68pF VR1B 4 6 5 C107 68pF...

Page 13: ...BBER ASSY 7695004000 LEFT CONTACT PCB ASSY w RUBBER ASSY 7695005000 A B C D E F G H I L M N O P Q R S T U J K 1 2 3 4 5 6 7 8 9 10 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 11 13 EP 77 Dec 1999 CIRCUIT DIAGRAM LEFT CONT PCB ASSY CIRCUIT DIAGRAM RIGHT CONT PCB ASSY ...

Page 14: ...Demo buttons 3 Effect Check Demo Go to Panning Check Metro Make a piano sound with Chorus effect Play Make a piano sound with Reverb effect Rec Make a piano sound with Resonance effect 4 Panning Check Demo Go to Tempo Beat Check Metro Make a C3 sine wave sound from left Play Make a C4 square wave sound from right Rec Make a C4 sine wave sound from center Flow Chart Enter Demo Sound Power On v N G ...

Page 15: ...max 7FH min 00H value and MIDI connection on off you can automatically exit TestMode 6 1 Notation of Pedal status Unchecked A D value is max pedal is depressed A D value is min pedal is released If two pedal s A D value move simultaneously the pedal status returns to be Unchecked If A D value is max 7FH bell sound is on 6 2 Notation of MIDI status Unchecked While connecting MIDI Out to MIDI In Whi...

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