Yamaha Silent SB Series Service Manual Download Page 10

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SILENT SB SERIES

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LSI PIN DISCRIPTION

PIN
No.

NAME

I/O

FUNCTION

PIN
No.

NAME

I/O

FUNCTION

1
2
3
4
5
6
7
8
9

10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32

P50/TxD0
P51/RxD0
P52/SCL0

/RES

NMI

Vcc

/STBY

Vcc

XTAL

EXTAL

MD1
MD0

AVss

P70/AN0
P71/AN1
P72/AN2
P73/AN3
P74/AN4
P75/AN5
P76/AN6
P77/AN7

AVcc

P60
P61
P62
P63
P64
P65
P66
P67

Vcc

P27/SCK1

I/O
I/O
I/O

I
I

I
I
I
I

I
I
I
I
I
I
I
I

I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O

I/O

Port5 / Transmission data
Port5 / Reception data
Port5 / Serial clock
Reset
Non-maskable interrupt
Power 5V
Stand-by mode signal
Ground

Crystal oscillator

Mode select

Analog ground

Port7 / Analog input

Analog power 5V

Port6

Power 5V
Port2 / Serial clock

33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64

P26/RxD1

P25/TxD1

P24/SCL1
P23/SDA1

P22
P21
P20

Vss

P17
P16
P15
P14
P13
P12
P11
P10
P30
P31
P32
P33
P34
P35
P36
P37

P40/IRQ2
P41/IRQ1
P42/IRQ0

P43
P44
P45
P46

P47/SDA0

I/O
I/O
I/O
I/O
I/O
I/O
I/O

I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O

Port2 / Reception data
Port2 / Transmission data
Port2 / Serial clock
Port2 / Serial data

Port2

Ground

Port1

Port3

Port4 / Interrupt request

Port4

Port4 / Serial data

HD64F2128F16 (X2690A00) CPU (FLASH)

KEY SENSOR: CPU1

CONTENTS

HD64F2128F16

(X2690A00)

CPU ........................................................... 10 page

HD6417014F28

(XU147A00)

CPU ............................................................ 11 page

TC203C760HF-001

(XR738A00)

SWP30 ...................................................... 12 page

TC203C760HF-002

(XS725A00)

SWP30B .................................................... 13 page

PCM1702U/2K

(XP551A00)

DAC ........................................................... 14 page

Summary of Contents for Silent SB Series

Page 1: ...RD LAYOUT 4 WIRING 4 DISASSEMBLY PROCEDURE 5 LSI PIN DISCRIPTION 10 IC BLOCK DIAGRAM 14 CIRCUIT BOARDS 15 TEST MODE ADJUSTMENT 19 RELOADING THE PROGRAM 21 MIDI IMPLEMENTATION CHART 23 PIANO MAINTENACE PART 24 PARTS LIST OVERALL CIRCUIT DIAGRAM SILENT SB SERIES YAMAHA PIANO U1 Silent MPU1 U3 Silent M112 Silent U1 Silent ...

Page 2: ...changes in specification are subject to change without notice or obligation to retrofit Should any discrepancy appear to exist please contact the distributor s Service Division WARNING Static discharges can destroy expensive components Discharge any static electricity your body may have accumulated by grounding yourself to the ground bus in the unit heavy gauge black wires connect to this bus IMPO...

Page 3: ...Hall 1 Hall 2 all with continuous depth control Volume control Continuous Demo Song 50 Pitch 438 445 in 1 hertz steps fine tuning in 1 2 cent steps Power supply PA 300 AC adaptor DC15 16V Terminals Headphones 2 MIDI IN OUT AUX IN OUT DC IN Supplied accessories HPE 170 headphones 1 AC adaptor 50 greats for the Piano score book 32 note stereo sampling 64 note stereo switchable POWER switch Two HEADP...

Page 4: ...OWER REVERB HEADPHONES PITCH VOLUME HP 1 2 HP 2 2 KEY SENSOR CN1 MN CN2 KS K Connector Assembly V5148200 HP 2 2 CN6 MN CN1 MN Connector Assembly HP 1 2 CN8 MN CN5 MN Connector Assembly HP 1 2 CN4 MN CN104 MN Connector Assembly HP 2 2 CN7 MN CN105 MN Connector Assembly HP 1 2 CN5 MN CN106 MN Connector Assembly HP 1 2 CN1 DC IN Unit MN Connector Assembly MN CN108 MN PS CN2 MN Connector Assembly V438...

Page 5: ...oved Fig A 3 3 Key Stop Keybard time required about 25 minutes 3 1 Remove the upper front board See Procedure A 1 3 2 Open the fall board upright then remove it upward 3 3 Remove the tow 2 screws marked A and the hexagonal nut marked B The key stop rail can then be removed Fig A 5 3 4 Remove all keys Fig A 6 When removing the keyboard take car not to damage the key shutter attached to the keyboard...

Page 6: ... the key stop rail See Procedure A 3 1 4 Remove all keys See Procedure A 3 1 5 Remove the eight 8 screws marked 31S the key sensor unit can then be removed Fig B 1 2 KEY SENSOR Circuit Board time required about 28 minutes 2 1 Remove the upper front board See Procedure A 1 2 2 Remove the key board cover See Procedure A 3 2 3 Remove the key stop rail See Procedure A 3 2 4 Remove all keys See Procedu...

Page 7: ...3 1 Remove the lower front board See Procedure A 2 3 2 Loosen the three 3 screws marked 51S the MN unit can then be removed Fig B 3 4 MN Circuit Board time required about 28 minutes 4 1 Remove the lower front board See Procedure A 2 4 2 Remove the six 6 screws marked 21G The MN circuit board can then be removed Fig B 4 5 MN POWER SUPPLY Circuit Board time required about 2 minutes 5 1 Remove the lo...

Page 8: ...e four 4 screws marked 41S The switch box unit can then be removed Fig B 5 7 HP 1 2 Circuit Board time required about 3 minutes 7 1 Remove the switch box unit See Procedure B 6 7 2 Remove the VOLUME knob and REVERB knob Fig B 6 7 3 Remove the two 2 hexagonal nuts marked C The HP 1 2 circuit board can then be removed Fig B 6 8 HP 2 2 Circuit Board time required about 3 minutes 8 1 Remove the switch...

Page 9: ...rews marked 81S The DC IN unit S can then be removed Fig B 7 10 Pedal Unit L time required about 1 minutes 10 1 Remove the lower front board See Procedure A 2 10 2 Remove the two 2 screws marked 61S The pedal unit L can the be removed Fig B 3 8 11 Pedal Unit S time required about 1 minutes 11 1 Remove the lower front board See Procedure A 2 11 2 Remove the two 2 screws marked 71S The pedal unit S ...

Page 10: ...Analog power supply 5V Port6 Power supply 5V Port2 Serial clock 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 P26 RxD1 P25 TxD1 P24 SCL1 P23 SDA1 P22 P21 P20 Vss P17 P16 P15 P14 P13 P12 P11 P10 P30 P31 P32 P33 P34 P35 P36 P37 P40 IRQ2 P41 IRQ1 P42 IRQ0 P43 P44 P45 P46 P47 SDA0 I O I O I O I O I O I O I O I O I O I O I O I O I O I O I O I O I O I O ...

Page 11: ...ort E 32 PB9 O Port B 88 PE3 I 33 VSS I Ground 89 PE4 I 34 RD O Bus control 90 VSS I Ground 35 WDTOVF O NC 91 AN0 I 36 WRH O NC 92 AN1 I 37 VCC I Power supply 93 AN2 I A D 38 WRL O Bus control 94 AN3 I 39 VSS I Ground 95 AN4 I 40 CS1 O Bus control 96 AN5 I 41 CS0 O Bus control 97 AVSS I Analog ground 42 PA9 O Port A 98 AN6 I A D 43 PA8 I Port A 99 AN7 I A D 44 CS3 O Bus control 100 AVCC I Power su...

Page 12: ... 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 VSS HMD0 HMD1 HMD2 HMD3...

Page 13: ...140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 ...

Page 14: ... HA1630Q04T X2869A00 Quad Operational Amplifier 4C KEY SENSOR OP001 002 µPC4570G2 XF291A00 Quad Operational Amplifier MN IC107 108 110 111 114 1 2 3 1A 1Y 4 2Y 5 2A 6 2B 7 GND 1B 14 13 12 VDD 4A 11 4Y 10 3Y 9 3B 8 3A 4B 1 2 3 4 V 8 7 6 5 Output A V Non Inverting Input A DC Voltage Supply DC Voltage Supply Output B Inverting Input B Non Inverting Input B Inverting Input A 1 2 3 4 8 7 6 5 OUT1 OUT2 ...

Page 15: ...oard V8968400 X2329B0 15 page MN Circuit Board V7986700 X0577A0 16 page MN POWER SUPPLY Circuit Board V4389300 XW593A0 18 page HP Circuit Board UPS V5460100 XY527A0 18 page KEY SENSOR Circuit Board Component side to MN CN2 KEY SENSOR V797810 WRITE MODE Pattern side ...

Page 16: ...to KEY SENSOR CN1 to HP 1 2 CN8 to PEDAL unit to HP 1 2 CN4 to HP 2 2 CN7 to HP 1 2 CN5 to HP 2 2 CN6 DIP SWITCH DAMPER to MN POWER SUPPLY CN02 MN V798670 MN Circuit Board Component side OPEN N C OPEN N C OPEN N C OPEN For maintenance ...

Page 17: ...SILENT SB SERIES 17 MN V798670 MN Circuit Board Pattern side ...

Page 18: ...N unit to MN POWER SUPPLY CN01 to MN CN104 to MN CN106 to MN CN105 to MN CN1 AUX IN OUT N C HEADPHONES VOLUME REVERB PITCH HP Circuit Board UPS MN POWER SUPPLY Circuit Board Component side Component side Component side to Power SW HP1 2 HP2 2 MN POWER SUPPLY V438930 HP V546010 ...

Page 19: ...f the key will be fixed and the tone will change to sounding every other second as before 7 Flash memory writing Press the soft pedal The tone will die away and writing will start The writing will be completed in about 10 seconds then the high tone will sound three or four times If the writing fails the error key is shown by NG key sound alternating re and do in the high tone Reference Rest value ...

Page 20: ...ne level of buzzer sound 3 Key Range Test Mode 1 Start up Switch on the power source while pressing the lowest A 1 B 3 C 4 and D 6 keys 2 Confirmation This confirmation mode is to make sure that the key shutter strokes are within the adjustment range Select one key That key will sound if its AD value is either 0 or over 98 of the maximum value As a guide to finding that the key is positioned corre...

Page 21: ...has no external MIDI driver installed to it Restart the program after setting the MIDI driver Supplement 1 KS1 is a classifying name for DU1A sensor 2 Changing Alias 1 If Alias sensor program is not registered you have to set for the program for the model on which you want to rewrite Alias 2 Click the Alias menu Select KS1 from the drop down list KS1 is displayed at the upper left Fig 2 3 If KS1 i...

Page 22: ...set It is likely that MIDI OUTPUT is connected to the PC s interior sound source Fig 6 shows an instance of PCC10XG for the PC card of Yamaha make Fig 7 Supplement 2 Registering Alias Click Add on the Alias menu Fig 2 The dialog shown in Fig 7 appears Enter a name for ALIAS Click the Browse button and specify the location of the folder containing the program file Register with the Set button The s...

Page 23: ...SILENT SB SERIES 23 ...

Page 24: ...service manuals will be provided as pdf formated data For the piano technicians the necessary maintenance pages are marked with index tabs To print out them and bring to the customer s house to give services are recommended SILENT UPRIGHT PIANO SB SERIES started in April 2002 Grey scale typed high resolution key shutters instead of metal ones Sensor board removable key sensor 50 sample songs Curre...

Page 25: ...e Hammer let off set off adjustment must be 1mm wider than the adjusted silent mode distance Turn on the POWER and check if all 88 keys sound correctly through headphones The standard volume position is at 3 o clock Depress the right pedal and play some notes to check electronic sustain function OK Complete the post delivery inspection Check first that if the gray scale shutter is damaged by takin...

Page 26: ...can be done as following drawings OK STEP 2 Height adjustment Lateral adjustment Base part Rear view Middle part Rear view Treble part Rear view 4 5 mm from string Max 7 mm 5 5 mm 8 mm 1 mm wider than stop opsition U1 Silent 69 mm from keybed 19 mm from front sill top U3 Silent 64 mm from keybed 21 mm form front sill top 10 mm white keys 13 15 mm from strings Shank stop position Hammer let set off...

Page 27: ...or the acoustic standard The correct sensor height is 4 2 mm 1 mm 1 mm between sensor top and black key bottom when the black key is fully depressed Fig 7 The key sensor has 4 height adjustment screws at base end 30 key 58 key and treble end Then key sensor measurement on the next page is recommended Check STEP 3 finally If the pedal sustain functions right pedal incorrectly in STEP 3 it can be in...

Page 28: ...on the RAM harmony sound every 2 sec Depress soft left pedal once to store data on the EPROM 76C sound intermittently Depress loud right pedal once to write the data on the RAM the note sound twice Repeat 1 5 to measure others Depress soft left pedal once to store the data on the EPROM 76C sound intermittently Play the key Depress loud right pedal once to write the data on the RAM the note sound 3...

Page 29: ...C Ex Do and Si mean version 2 Fig 11 Shutter base is not glued and can be removed with a pliers How to replace shutter and shutter base Key Shutter V7978300 DIP SWITCH ON MN BOARD Silent pianos include a 4 bit DIP switch on the MN board During normal use the switch bits SW1 to SW4 are generally all set to OFF but during servicing or maintenance you can use them to execute function checks as descri...

Page 30: ...SILENT SB SERIES 30 Fig 12 For discribing the position for parts or explaining the symptoms silent SB Service Manual PP 008599 Piano maintenance part ...

Page 31: ...B British model C Canadian model E European model H North European model I Indonesian model Notes DESTINATION ABBREVIATIONS J Japanese model U U S A model V General export model 110V W General export model 220V X General export model Y Export model The numbers in QTY show quantities for each unit The parts with in Parts No are not available as spare parts The mark in the remarks column indicates t...

Page 32: ...U3 System 96 42S 43S 50 41S 45 46S 48S 47 150 151S 30 31S 180 181S 235 185 170 285 130 110 151S 81S 80 70 71S 60 61S 120 121S 100 140 90 220 221S 50 51S 210 211S 186 290 280 Left Side C View E View 160 161S U3 only 100a 110a 90a 90b 222S 223S 212S 213S 201S 202S U1 Silent U3 Silent ...

Page 33: ... Side 285 170 90 200 185S 180 186 187 181 51S 50 121S 120 70 60 61S 71S 140 100 43S 42S 40 47 45 48S 41S 46S 151S 30 31S 130 150 110 280 C View 161S 160 A View E View B View C E A B D D View 90a 90b 100a 110a 165 M112 Silent ...

Page 34: ... 2 UP UCE314 D 4 0X20 MFZN2BL 4 0X12 MFZN2BL UP 5X30 4 0X12 MFZN2BL 4 0X12 MFZN2BL 4 0X16 MFZN2Y 4 0X16 MFZN2Y 4 0X16 MFZN2Y OVERALL ASSEMBLY Overall Assembly Overall Assembly Overall Assembly Key Sensor Unit Key Sensor Unit Key Sensor Unit Switch Box Unit Nylon Clamp Black Cord Binder MN Unit Pedal Unit L Pedal Unit S DC IN Unit S Connector Assembly Ferrite Core Bushing Connector Assembly Ferrite...

Page 35: ...2Y 3 0X10 MFZN2Y 6 0 MFZN2Y HPE 170 PA 300 U PA 300 E PA 300 GBR PA 300 AUS AUS Truss Head Tapping Screw 1 Bind Head Tapping Screw S Truss Head Tapping Screw 1 Bind Head Tapping Screw 1 Bind Head Tapping Screw 1 Bind Head Tapping Screw 1 Flat Washer Truss Head Tapping Screw 1 Hexagonal Nut Flat Washer Bind Head Screw Bind Head Tapping Screw S Toothed Lock Washer B Bind Head Screw Bind Head Tapping...

Page 36: ...ZN2Y UP 5X30 3 0X4 MFZN2Y 3 0X18 MFZN2Y KEY SENSOR UNIT Key Sensor Unit Key Sensor Unit Key Sensor Unit Angle Bracket Sensor Head Plug Optical Fiber Circuit Board Key Sensor Spring Holder Key Sensor Holder Spring Adhesive Tape Bind Head Tapping Screw S Cord Binder Cord Binder Label Bind Head Tapping Screw S Bind Head Screw V9444200 V9444300 V9444400 VN371200 V8968400 V8891500 CB080100 VP357200 VP3...

Page 37: ...MN UPS 04054 S 14B 3 0X6 MFZN2Y 3 0X6 MFZN2Y 3 0X6 MFZN2Y MN UNIT MN Unit Angle Circuit Board Cord Binder Cord Binder Connector Circuit Board Cord Binder Connector Assembly Cord Binder Cord Binder Bind Head Tapping Screw S Bind Head Tapping Screw S Bind Head Tapping Screw S V3768300 V7986700 VB582500 CB817510 V4389300 VB582500 V4389600 VB582500 CB817510 EP600410 EP600410 EP600410 10 20 22 23 24 30...

Page 38: ...U C S SJ 5023 3 0X12 MFZN2BL 15X30 SWITCH BOX UNIY Switch Box Unit Switch Box Circuit Board Knob Black Connector Assembly Seesaw Switch Foot Bind Head Tapping Screw P Adhesive Tape V8950100 V5460100 CB028970 VQ861700 VQ861800 CB826590 VC161100 CB080100 10 20 30 40 40a 60 21G 70G DESCRIPTION REF NO PART NO 部品名 REMARKS QTY RANK New parts RANK Japan only SWITCH BOX UNIT 21G 40 30 10 70G 20 60 Left ...

Page 39: ...ラケットＮスミチューブＣ PDS L RK16Y11L0001A N 1 PEDAL UNIT L Pedal Unit L Connector Assembly Rotary Variable Resistor Wire Spring Holder Wire Black L Sensor Bracket Tube VQ461900 VQ493300 HS412520 AA104230 CB059320 1 1a 3 4 6 5G DESCRIPTION REF NO PART NO 部品名 REMARKS QTY RANK New parts RANK Japan only PEDAL UNIT L 3 5G 4 1a 6 1 Top View Rear View Left Side View ...

Page 40: ...PDS S 3 0X12 MFZN2Y 3 0X20 MFZN2Y PEDAL UNIT S Pedal Unit S Connector Assembly Switch Assembly Pedal Sensor Spring Sensor Bracket Bind Head Tapping Screw S Bind Head Screw VQ861200 VQ861100 NB037050 VR068900 VH553800 EG330130 1 1a 2 3 10G 11G DESCRIPTION REF NO PART NO 部品名 REMARKS QTY RANK New parts RANK Japan only PEDAL UNIT S 11G 1 2 3 10G 1a Left Side View Top View ...

Page 41: ... 小ネジ PA 300 DC IN DC IN DC IN 3 0X6 MFZN2BL DC IN UNIT S DC IN Unit S Angle Jack Holder Connector Assembly AC Cord Plate Tape Bind Head Screw V9607500 V9598000 V9598100 V9607600 VE545100 EG330360 10 20 30 40 21G 50G DESCRIPTION REF NO PART NO 部品名 REMARKS QTY RANK New parts RANK Japan only DC IN UNIT S 50G 40 10 20 30 21G Rear View Left Side View ...

Page 42: ...d Circuit Board Circuit Board Phone Jack Phone Jack Semiconductive Cera Cap Semiconductive Cera Cap Ceramic Capacitor SL Base Post Connector Base Post Connector Base Post Connector Connector Base Post Base Post Connector Connector Base Post Connector Base Post Connector Base Post Diode Phone Jack Phone Jack Jumper Wire Jumper Wire Coil Coil Coil Coil Coil Coil DIN Connector Carbon Resistor Carbon ...

Page 43: ... LED LED LED LED LED LED LED LED LED IC IC Photo Coupler Photo Diode Photo Diode Transistor Carbon Resistor chip Carbon Resistor chip Carbon Resistor chip Carbon Resistor chip Carbon Resistor chip Carbon Resistor chip Carbon Resistor chip Carbon Resistor chip Carbon Resistor chip Metal Oxide Film Resistor Metal Oxide Film Resistor Metal Oxide Film Resistor Metal Oxide Film Resistor Carbon Resistor...

Page 44: ...istor Array Ceramic Resonator Sensor Socket AS Black Sensor Socket Base Pan Head Tapping Screw P Label Circuit Board Heat Sink Bind Head Screw Ceramic Capacitor SL chip Ceramic Capacitor F chip Ceramic Capacitor F chip Electrolytic Cap chip Ceramic Capacitor CH chip Ceramic Capacitor CH chip Ceramic Capacitor SL chip Ceramic Capacitor F chip Ceramic Capacitor F chip Ceramic Capacitor F chip Electr...

Page 45: ...chip Electrolytic Cap chip Electrolytic Cap chip Ceramic Capacitor B chip Ceramic Capacitor B chip Ceramic Capacitor SL chip Ceramic Capacitor B chip Ceramic Capacitor B chip Ceramic Capacitor SL chip Ceramic Capacitor F chip Ceramic Capacitor F chip Ceramic Capacitor SL chip Electrolytic Cap BP chip Ceramic Capacitor SL chip Electrolytic Cap BP chip Ceramic Capacitor F chip Ceramic Capacitor F ch...

Page 46: ...K 63M J Chip Inductance Chip Inductance Chip Inductance Chip Inductance Chip Inductance Chip Inductance Chip Inductance Photo Coupler Photo Coupler IC IC IC IC IC IC IC IC Photo Coupler Photo Coupler IC IC IC IC IC IC Photo Coupler Photo Coupler IC IC IC IC IC IC IC IC IC IC IC IC Carbon Resistor chip Carbon Resistor chip Carbon Resistor chip Carbon Resistor chip Carbon Resistor chip Carbon Resist...

Page 47: ...p Carbon Resistor chip Carbon Resistor chip Carbon Resistor chip Carbon Resistor chip Carbon Resistor chip Carbon Resistor chip Carbon Resistor chip Carbon Resistor chip Carbon Resistor chip Carbon Resistor chip Carbon Resistor chip Carbon Resistor chip Carbon Resistor chip Carbon Resistor chip Carbon Resistor chip Carbon Resistor chip Metal Oxide Film Resistor Carbon Resistor chip Carbon Resistor...

Page 48: ... 10UH SNT D20TF 10UH VLAO4L3 U C S RK16Y11L0001A Carbon Resistor chip Carbon Resistor chip Carbon Resistor chip Resistor Array Resistor Array Resistor Array Resistor Array Relay IC Socket Chip Inductance Chip Inductance Slide Switch Transistor Transistor Transistor Transistor Transistor Transistor Trimmer Potentiometer Quartz Crystal Unit Quartz Crystal Unit Circuit Board Heat Sink Bind Head Screw...

Page 49: ...V µPC2412AHF AC Adaptor OPEN KSN05A V858590 INVERTER SYSTEM RESET Photo Coupler INVERTER SILENT SB SERES SILENT SB SERES SILENT SB SERES SBT Coil X5 FL Coil X5 Rotary SW Pitch SW1 or SW2 OPEN OPEN N C POWER SUPPLY About 4 3V PA 300 NJM7812FA XJ608A00 REGULATOR 12V MN IC115 1 2 1 OUTPUT 2 INPUT 3 COMMON 3 NJM79L05UA XN086A00 REGULATOR 5V MN IC104 NJM78L05UA XJ598A00 REGULATOR 5V MN IC103 M5237ML XP...

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