Panasonic KX-T7630 Service Manual Download Page 17 | Manualshive

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10.5. POWER SUPPLY CIRCUIT

This circuit converts the voltage supplied from PBX into the power supply voltage of +3.3V by
IC6(Switching Regulator IC).
IC10 controls the power supply circuit as below to turn IC6 on in low consumption current at
starting up.

- Input Voltage approx. 30V or less IC10-pin 1 L IC6 OFF
- Input Voltage approx. 30V or more IC10-pin 1 HiZ IC6ON

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Summary of Contents for KX-T7630

Page 1: ...630 for Australia IMPORTANT INFORMATION ABOUT LEAD FREE PbF SOLDERING If lead free solder was used in the manufacture of this product the printed circuit boards will be marked PbF Standard leaded Pb solder can be used as usual on boards without the PbF mark 1 ...

Page 2: ...recautions standard Pb solder can also be used Caution PbF solder has a melting point that is 50 70 F 30 40 C higher than Pb solder Please use a soldering iron with temperature control and adjust it to 700 20 F 370 10 C In case of using high temperature soldering iron please be careful not to heat too long PbF solder will tend to splash if it is heated much higher than its melting point approximat...

Page 3: ...gure below 2 FOR SERVICE TECHNICIANS ICs and LSIs are vulnerable to static electricity When repairing the following precautions will help prevent recurring malfunctions 1 Cover the plastic parts boxes with aluminum foil 2 Ground the soldering irons 3 Use a conductive mat on the worktable 4 Do not touch IC or LSI pins with bare fingers 3 SPECIFICATIONS Station Loop Limit 90 ohms Calling Method 2 pa...

Page 4: ...4 ...

Page 5: ...5 CONNECTION Caution Consult your dealer for more details about XDP 6 DISASSEMBLY INSTRUCTIONS 1 Remove 9 Screws A 2 Remove the Bottom Cabinet 5 ...

Page 6: ...oldering iron An expert may be able to use a 60 to 80 Watt iron where someone with less experience could overheat and damage the PCB foil Flux Recommended Flux Specific Gravity 0 82 Type RMA lower residue non cleaning type Note See ABOUT LEAD FREE SOLDER PbF Pb free 7 2 PROCEDURE 1 Tack the flat pack IC to the PCB by temporarily soldering two diagonally opposite pins in the correct positions on th...

Page 7: ...oldering iron along the tips of the pins while feeding enough solder to the tip so that it flows under the pins as they are heated 7 3 REMOVING SOLDER FROM BETWEEN PINS 1 Add a small amount of solder to the bridged pins 2 With a hot iron use a sweeping motion along the flat part of the pin to draw the solder from between the adjacent pads 8 TROUBLESHOOTING GUIDE 7 ...

Page 8: ...8 1 NO OPERATION Note Refer to 1 5 of WAVEFORM for waveform 8 2 LCD DOES NOT OPERATION 8 ...

Page 9: ...Note Refer to 6 of WAVEFORM for waveform 8 3 HANDSET DOES NOT WORK Receive Send 9 ...

Page 10: ...Note Refer to 7 8 of WAVEFORM for waveform 8 4 HEADSET DOES NOT WORK Receive Send Note 10 ...

Page 11: ...Refer to 7 8 of WAVEFORM for waveform 8 5 SPEAKER PHONE TROUBLE Receive Send Note Refer to 7 8 of WAVEFORM for waveform 8 6 DXDP DPT DOES NOT WORK 11 ...

Page 12: ...K DIAGRAM 10 CIRCUIT OPERATIONS 10 1 KEY INPUT CONTROL CIRCUIT The key data is under the matrix control by 19 to 23 25 44 45 KEYOUT and 28 to 35 KEYIN of IC3 The key information outputted from KEYOUT is inputted into KEYIN when the key is pressed 12 ...

Page 13: ...h outputs the voltage necessary for LCD driving 4 5V from 1 2V generated at IC8 as a reference to 3 3V of the power supply voltage is pressurized four times in the LCD module and used as LCD driving voltage approx 18V LCD contrast is set by electronic volume in the LCD module The type of the LCD module is distinguished by pin 62 of IC3 13 ...

Page 14: ...Pin 62 of IC3 L KX T7636 24 digits 6 lines H KX T7630 KX T7633 24 digits 3 lines The lighting of the backlight is controlled by Q1 IC3 pin 56H Q1 ON Backlight ON IC3 pin 56L Q1 OFF Backlight OFF 14 ...

Page 15: ...d pin 11 to 16 Colum of IC5 The LED lights up in a dynamic lighting system The duty ratio is 1 8 ON time 1 5mS Only D107 of LED for CO7 lights up in a static lighting system IC5 pin 55 H CO7 Green ON IC5 pin 55 L CO7 Green OFF IC5 pin 56 H CO7 Red ON IC5 pin 56 L CO7 Red OFF 15 ...

Page 16: ...10 4 RESET CIRCUIT Reset Signal is outputted from IC1 and inputted into IC3 and IC5 at the connection of TEL cord 16 ...

Page 17: ...to the power supply voltage of 3 3V by IC6 Switching Regulator IC IC10 controls the power supply circuit as below to turn IC6 on in low consumption current at starting up Input Voltage approx 30V or less IC10 pin 1 L IC6 OFF Input Voltage approx 30V or more IC10 pin 1 HiZ IC6ON 17 ...

Page 18: ...control LCD control voice data etc This information is continuously exchanged at all times Circuit Operation The data received from PBX is inputted to the comparator pin 68 built in IC5 through Pulse Trans T1 The threshold voltage of the comparator is determined by R62 to 64 and inputted to pin 67 and 29 The data to PBX is outputted from pin 70 and 71 of IC5 drives T1 by Transistor Q2 and transmit...

Page 19: ...e data from Slave DPT is inputted to the comparator pin 61 built in IC5 The threshold voltage of the comparator is determined by R65 to 67 and inputted to pin 60 and 62 Also the supplying power to Slave DPT is controlled by a constant current circuit of Q15 as below IC5 pin 58 as H Constant current circuit ON IC5 pin 58 as L Constant current circuit OFF IC5 pin 57 as H 40mA Feeding Slave DPT usual...

Page 20: ...built in Amp A D conversion inputted to IC5 in PCM data Gain adjustment by DSP of IC5 then sent to PBX Transmitting signal inputted from handset microphone is controlled by transmission switching SW IC7 as below IC3 pin 52 L Handset Call IC3 pin 52 H Headset Call Receiving signal inputted from PBX is Gain adjustment by DSP of IC5 D A conversion after the input to IC4 in PCM data IC4 built in Amp o...

Page 21: ...ecks voice level of the calling party acousticity in a room voice level of the other party and state of the line of contact and cancels echo in transmitting and receiving at the start of calling It operates in a half double call state in a few seconds for the check Transmitting signal is inputted from SP phone mic and amplified by IC4 built in Amp A D conversion inputted to IC5 in PCM data Gain ad...

Page 22: ... 11 CML5 out LED column drive 5 12 CML4 out LED column drive 4 13 CML3 out LED column drive 3 14 CML2 out LED column drive 2 15 CML1 out LED column drive 1 16 CML0 out LED column drive 0 17 VDD Digital power supply 18 GND Digital ground 19 NROW9 out LED row drive 9 20 NROW8 out LED row drive 8 21 NROW7 out LED row drive 7 22 NROW6 out LED row drive 6 23 NROW5 out LED row drive 5 24 NROW4 out LED r...

Page 23: ...put for handset SP Amp 46 SPI in Input for handset SP 47 AVDD Digital power supply 48 GND Digital ground 49 PCK4MN tri 4 096MHz serial clock 50 PSX tri 2 048MHz serial data output 51 PSYNC tri 8Khz frame synchronized signal 52 PSR in Built in 2 048MHz serial data Input 53 PCK2M tri 2 048MHz serial clock 54 PEP SCLK tri Channel pulse Serial clock 55 OP4 out CO7 green LED control port H LEDON 56 OP5...

Page 24: ...tri 8MHz clock For CPU 78 GND Digital ground 79 OSI in Crystal oscillator input 80 OSO out Crystal oscillator output 81 VDD Digital power supply 82 ADR6 in Built in Address 6 83 ADR5 in Built in Address 5 84 ADR4 in Built in Address 4 85 ADR3 in Built in Address 3 86 ADR2 in Built in Address 2 87 ADR1 in Built in Address 1 88 ADR0 in Built in Address 0 89 VDD Digital power supply 90 GND Digital gr...

Page 25: ... SI1 I Built in OP_Busy Low active 12 P23 SO1 O not inuse 13 P24 SCK3 O Built in OP_SCK 14 P25 RxD I Built in OP_RXD 15 P26 TxD O OP_TXD 16 P27 IRQ0 I out OP Tx En 17 P17 IRQ3 I Built in Hook detection L OFF HOOK 18 P16 IRQ2 I Built in GA_RxINT Low active 19 P15 IRQ1 I O Built in KEYOUT0 20 P14 I O Built in KEYOUT1 21 P13 TMIG I O Built in KEYOUT2 22 P12 TMOFH I O Built in KEYOUT3 23 P11 TMOFL I O...

Page 26: ...UT7 46 P72 O AD2 47 P73 O AD3 48 P74 O AD4 49 P75 O AD5 50 P76 O AD6 51 P77 O SP_AMP OFF H OFF L ON 52 P80 O MIC switch L Hand set H Head set 53 P81 O EEPROM CLK Clock output 54 P82 I O out EEPROM DATA Serial data input output 55 P83 O CODEC CS 56 P84 I O out Model distinction 1 After confirmation of H the pin switches to an output port 57 P85 I out down Ringer position detection H ON L OFF 58 P86...

Page 27: ...13 CABINET AND ELECTRICAL PARTS LOCATION 27 ...

Page 28: ...14 ACCESSORIES AND PACKING MATERIALS 28 ...

Page 29: ... Retention Time is limited for this item After the discontinuation of this assembly in production the item will continue to be available for a specific period of time The retention period of availability is dependent on the type of assembly and in accordance with the laws governing parts and 29 ...

Page 30: ...e s specified parts 3 The S mark means the part is one of some identical parts For that reason it may be different from the installed part 4 ISO code Example ABS HB of the remarks column shows quality of the material and a flame resisting grade about plastics 5 RESISTORS CAPACITORS Unless otherwise specified All resistors are in ohms K 1000 M 1000k All capacitors are in MICRO FARADS F P F Type Wat...

Page 31: ...91Z1 PUSH BUTTON FUNCTION ABS HB 21 PSBX1089Z1 PUSH BUTTON DIAL ABS HB 22 PSYX1003Z1 PUSH BUTTON 6 KEY ABS HB 23 PSBC1027Z1 PUSH BUTTON CURSOR ABS HB 24 PSBX1090Z1 PUSH BUTTON CO LINE ABS HB 25 PSBC1029Z1 PUSH BUTTON CANCEL ABS HB 26 PSBC1026Z1 PUSH BUTTON ENTER ABS HB 27 PSSX1029Z KEYBOARD SWITCH MAIN PART 28 PSSX1019Z KEYBOARD SWITCH APRON PART 29 PSJE1031Z LEAD WIRE 30 PSJE1030Z LEAD WIRE 31 PS...

Page 32: ...SH04F IC S IC9 C3EBAC000002 IC IC10 PQVIC61CN30N IC S TRANSISTORS Q2 PSVTUMS1NTR TRANSISTOR SI S Q3 B1GHCFCJ0001 TRANSISTOR SI Q4 B1GHCFEM0001 TRANSISTOR SI Q5 B1GHCFEM0001 TRANSISTOR SI Q6 B1GHCFEM0001 TRANSISTOR SI Q7 B1GHCFEM0001 TRANSISTOR SI Q8 B1HFCFA00008 TRANSISTOR SI Q9 XP4601 TRANSISTOR SI S Q10 2SC4081Q TRANSISTOR SI S Q11 B1HBGBA00001 TRANSISTOR SI Q12 B1HBGBA00001 TRANSISTOR SI Q13 B1...

Page 33: ...LED S D126 PSVD1SRCT LED S D127 PSVD1SRCT LED S D128 PSVD1SRCT LED S D129 PSVD1VGCT LED S D130 B3AAB0000111 DIODE SI D131 B3ABB0000146 DIODE SI D132 B3ABB0000146 DIODE SI D133 PSVD1SRCT LED S CONNECTORS CN1 K1MN22A00007 CONNECTOR 22 PIN CN4 K1MN04B00052 CONNECTOR 4 PIN CN5 K1MN04B00052 CONNECTOR 4 PIN CN6 PSJP02A05Z CONNECTOR 2 PIN S CN7 PSJP02A05Z CONNECTOR 2 PIN S CN8 K1MN09B00059 CONNECTOR 9 PI...

Page 34: ...RJ3GEYJ105 1M R7 ERJ3GEYJ471 470 R8 ERJ3GEYJ473 47k R9 ERJ3GEYJ103 10k R10 ERJ3GEYJ102 1k R11 ERJ3GEYJ102 1k R12 ERJ6GEYJ3R3 3 3 R13 ERJ3GEYJ473 47k R15 ERJ3GEYJ121 120 R17 ERJ3GEYJ182 1 8k R18 ERJ3GEYJ222 2 2k R19 ERJ3GEYJ102 1k R20 ERJ3GEYJ222 2 2k R21 ERJ3GEYJ473 47k R23 ERJ3GEYJ333 33k R24 ERJ3GEYJ563 56k R25 ERJ3GEYJ473 47k R26 ERJ3GEYJ103 10k R27 ERJ3GEYJ183 18k R28 ERJ3GEYJ223 22k R29 ERJ3G...

Page 35: ...k R64 ERJ3GEYJ123 12k R65 ERJ3GEYJ562 5 6k R66 ERJ3GEYJ682 6 8k R67 ERJ3GEYJ103 10k R68 ERJ3GEYJ122 1 2k R69 ERJ3GEYJ472 4 7k R70 ERJ3GEYJ182 1 8k R71 ERJ3GEYJ121 120 R72 ERJ3GEYJ121 120 R73 ERJ3GEYJ180 18 R74 ERJ3GEYJ121 120 R75 ERJ3GEYJ180 18 R76 ERJ3GEYJ121 120 R77 ERJ3GEYJ180 18 R78 ERJ3GEYJ121 120 R79 ERJ3GEYJ180 18 R80 ERJ3GEYJ220 22 R81 ERJ3GEYJ220 22 R82 ERJ3GEYJ472 4 7k R83 ERJ3GEYJ101 10...

Page 36: ...2 1k R122 ERJ3GEYJ473 47k R124 ERJ3GEYJ105 1M R125 ERJ3GEYJ274 270k R126 ERJ3GEYJ822 8 2k R127 ERJ3GEYJ100 10 R128 ERJ3GEYJ151 150 R129 ERJ3GEYJ473 47k R130 ERJ3GEYJ221 220 R131 ERJ3GEYJ473 47k R132 ERJ3GEYJ473 47k R133 ERJ3GEYJ1R0 1 CAPACITORS C1 PQCUV1C225ZF 2 2 C2 PQCUV1C225ZF 2 2 C3 PQCUV1C225ZF 2 2 C4 PQCUV1C225ZF 2 2 C5 PQCUV1H105JC 1 S C6 PQCUV1H105JC 1 S C7 PQCUV1H105JC 1 S C8 PQCUV1H105JC...

Page 37: ... ECUV1A106ZF 10 C47 ECUV1C104ZFV 0 1 C48 ECUV1C104ZFV 0 1 C49 ECUV1A106ZF 10 C50 ECUV1A106ZF 10 C51 ECUV1C104KBV 0 1 C53 ECUV1C104KBV 0 1 C54 ECUV1H103KBV 0 01 S C56 ECUV1C104KBV 0 1 C58 ECUV1C104ZFV 0 1 C59 EEEFK0J101P 100 C63 ECUV1H120JCV 12p C66 ECUV1C104ZFV 0 1 C69 ECUV1C104ZFV 0 1 C71 ECUV1C104ZFV 0 1 C72 ECUV1C104ZFV 0 1 C73 ECUV1C104ZFV 0 1 C74 ECUV1H102KBV 0 001 S C75 ECUV1H102KBV 0 001 S ...

Page 38: ...1 C114 ECUV1E223KBV 0 022 C115 ECUV1H103KBV 0 01 S C116 ECUV1H103KBV 0 01 S C117 ECUV1C104ZFV 0 1 C118 ECUV1C104ZFV 0 1 C119 ECUV1H103KBV 0 01 S C120 ECUV1H100DCV 10p C121 ECUV1H100DCV 10p C122 ECUV1H100DCV 10p C123 ECUV1H100DCV 10p C124 ECUV1H100DCV 10p C125 ECUV1H100DCV 10p C126 ECUV1H100DCV 10p C129 ECUV1C104ZFV 0 1 C142 ECUV1H100DCV 10p C144 ECUV1H102KBV 0 001 S C146 ECUV1H100DCV 10p C147 ECUV...

Page 39: ...17 SCHEMATIC DIAGRAM 18 WAVEFORM 19 PRINTED CIRCUIT BOARD MAIN SUB BOARDS 19 1 COMPONENT VIEW 19 2 BOTTOM VIEW Y KXT7630AL 39 ...

Page 40: ... LCD_SCK 4 LCD_DATA 5 MODELCOAD 22 R21 47K DG JK4 1 5 4 3 2 AG CN5 1 HS2SP 2 GND 3 HS2MIC 4 C20 1000P C36 0 1 R27 18K R19 1K R20 2 2K A3 3V AG AG R18 2 2K A3 3V R17 1 8K A3 3V AG CN4 1 2 3 4 R23 33K R24 56K C32 1200P C39 C42 3300P NC R14 SP1 MIC1 AG1 SP2 AG2 MIC2 MIC3 AG3 SP3 SP3 NC R16 R12 3 3 C28 Z22 C29 Z10 C30 Z10 C31 Z10 C23 Z0 1 DG D3 3V C18 Z0 1 R10 1K R11 1K R9 10K I1 I2 IC9 5 2 1 3 4 IC7 ...

Page 41: ...D133 SPPHONE SW148 FLASH SW150 REDIAL SW152 CANSEL PROG SW153 ENTER SW154 MESSAGE SW155 HOLD SW157 DOWN SW158 LEFT SW159 RIGHT C10 Z0 1 D3 3V DG C1 Z2 2 C2 Z2 2 C3 Z2 2 C4 Z2 2 C5 Z1 C6 Z1 C7 Z1 C8 Z1 C9 50VZ1 R3 1M R4 1M R1 1M R2 1M C22 Z0 1 IC8 2 4 DG D2 D3 SW132 CO6 SW140 AUTO STORE D11 D8 AREACOAD3 D10 MODELCOAD2 D6 AREACOAD1 D7 AREACOAD2 SW141 4 SW133 5 SW125 6 SW147 TRANS E1 E2 E4 E3 E6 E5 E...

Page 42: ...8 2K R41 47K R45 47K R40 47K R42 39K C43 0 1 R36 33K C48 Z0 1 C47 Z0 1 C66 Z0 1 C73 Z0 1 DG Q14 1 4 3 2 5 6 R97 27 R99 18 R89 12K DG D3 3V R47 10K R46 220 C56 0 1 C53 0 1 R43 5 6K DG C68 820P B A C51 0 1 A3 3V GND R49 1K R50 1K R35 1K R51 1K AG NC C60 NC C61 NC C45 NC C62 DG DG DG R48 180 C46 Z10 D4 Q15 E C B AG CN13 1 A UK 2 T 3 R 4 Q9 1 2 3 4 5 6 C50 Z10 C49 Z10 R38 47K D3 3V PN9CLK R108 120 NC ...

Page 43: ...K R57 1 2K R94 18 DG R106 27 A2 A3 A4 A5 A8 A7 A9 A6 A10 A1 B1 B2 B3 B4 B5 B6 DG R53 470 R54 470 NC C82 CN11 1 2 3 4 CN12 1 2 3 4 Q12 1 6 2 4 3 5 Q13 1 6 2 4 3 5 AG OCK4MN 35 REN 2 WEN 1 OPO EYECLK 36 OP1 EYESYNC 37 OP2 EYED 38 OP3 39 INTN 4 OSR 32 OSX 31 OSYNC 33 OCK2M 34 11 CLM5 12 CLM4 13 CLM3 14 CLM2 15 CLM1 16 CLM0 19 NROW9 20 NROW8 21 NROW7 22 NROW6 23 NROW5 24 NROW4 25 NROW3 26 NROW2 27 NRO...

Page 44: ...D3 3V Pin8 of IC3 and Pin100 of IC5 2 3 1 Pin80 of IC5 16 384MHz Pin5 of IC3 8 196MHz Pin8 of IC3 and Pin100 of IC5 Reset signal ...

Page 45: ... Pin4 of CN1 Pin5 of CN1 send data to PBX receive data from PBX send data to PBX receive data from PBX 5 6 4 Between H and L Communication waveform 2 Pin4 of T1 Communication waveform 1 Pin1 to 5 of CN1 Communication waveform ...

Page 46: ...data from DPT of DXDP Pin8 of IC4 Pin9 of IC4 Pin11 of IC4 Pin9 of IC4 Pin8 of IC4 Pin52 of IC5 8 9 7 Pin52 of IC5 Communication waveform about send Pin11 of IC4 Communication waveform about receive Pin61 of IC5 Communication waveform ...

Page 47: ... 36 30 25 C43 C116 R33R32 C134 R24 R12 C122 C36 MIC2 AG2 CN8 CN6 1 2 SP2 E6 B1 A1 9 1 F7 F6 Q16 C113 AG3 E7 F4 MIC3 E3 A C35 C33 SP3 SP3 C27 1 4 1 2 A3 3V C32 C142 IC7 IC2 1 1 8 C42 C41 C125 C45 R35 C136 R31 R125 R27 C39 R30 R126 C21 C146 C124 IC4 12 13 24 1 R129 C55 C56 R56 R94 Q3 Q4 Q5 Q6 Q7 C73 R54 R110 C57 C82 JK4 R132 R122 C67 R55 C70 C59 C111 C65 C76 R42 C137 C58 C62 C61 C60 R103 R37 R49 R50...

Page 48: ...O24 SW107 CO23 SW106 CO22 SW105 CO21 SW104 CO20 SW103 CO19 SW115 CO17 SW114 CO16 SW113 CO15 SW112 CO14 SW111 CO13 SW116 CO18 CO9 CO8 CO7 CO6 CO5 AUTO STORE AUTO ANSWER CONF SW138 SW142 SW139 INTERCOM 1 SW141 4 SW117 7 SW109 8 SW101 9 SW118 SW110 0 SW102 SW133 5 SW125 6 SW134 2 SW126 SW124 SW132 CN4 4 1 SW131 CO4 SW130 CO3 SW129 CO2 SW128 CO1 SW127 3 S1 S2 S3 SW143 SW143_2 S4 D112 D111 D110 D109 D1...

Page 49: ... R124 R51 33 36 30 25 C43 C116 R33R32 C134 R24 R12 C122 C36 MIC2 AG2 CN8 CN6 1 2 SP2 E6 B1 A1 9 1 F7 F6 Q16 C113 AG3 E7 F4 MIC3 E3 A C35 C33 SP3 SP3 C27 1 4 1 2 A3 3V C32 C142 IC7 IC2 1 1 8 C42 C41 C125 C45 R35 C136 R31 R125 R27 C39 R30 R126 C21 C146 C124 IC4 12 13 24 1 R129 C55 C56 R56 R94 Q3 Q4 Q5 Q6 Q7 C73 R54 R110 C57 C82 JK4 R132 R122 C67 R55 C70 C59 C111 C65 C76 R42 C137 C58 C62 C61 C60 R103...

Page 50: ...MHz 3 3V TO LCD CN1 HOOK SW SO SCL A0 RES CS1 HF COMP IC5 ASIC EEPROM 128bit IC9 SP MIC JK4 HEADSET JACK POWER IC6 JK3 IC2 8 196MHz D6 T1 DPTS I F COMP DATA COMUNICATION Q8 Q9 Q2 Q15 IC7 LED Message D130 132 DDX0 DDX1 DDR CLK DATA CS 1 2V IC8 C11 12 D1 13 Charge Pump Q16 DSP CORE PCM I F ECHO CHANCELLOR GAIN CONTROLLER CONNECTOR CN8 CN9 CONNECTOR CN11 CN12 OPTION I F LED s driver CPU I F TEL JACK ...

Page 51: ...9K C43 0 1 R36 33K C48 Z0 1 C47 Z0 1 C66 Z0 1 DG A3 3V AG CN4 1 2 3 4 DG D3 3V R47 10K R46 220 C56 0 1 C53 0 1 R43 5 6K DG C68 820P R24 56K C32 1200P NC C39 C51 0 1 SP1 MIC1 AG1 SP2 AG2 MIC2 MIC3 AG3 SP3 SP3 R49 1K R50 1K R35 1K R51 1K AG NC C60 NC C61 NC C45 NC C62 DG DG DG NC R16 R12 3 3 C28 Z22 C29 Z10 C30 Z10 C31 Z10 C46 Z10 C23 Z0 1 AG C50 Z10 C49 Z10 R38 47K D3 3V PN9CLK IC7 1 6 7 5 IC7 8 4 ...

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