PANASONIC KX-FT938 free download

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POWER SUPPLY BOARD Tact SW OPERATION PANEL LCD PANEL English 2 lines +24 MESSAGE +6V GATE ARRAY SENSOR x2 (Doc sensor, Read position sensor) KEY MATRIX (Not Used) MIC PCONT +24V +6V DIGITAL BOARD IC5 MODEM LINERX LINETX Rx PSHORT Transformer ANALOG BOARD +6V REG BOA DRAM 4Mbit 3.3V IC4 FLASH 4Mbit PROGRAM 3.3V IC2 FLASH 4Mbit (TAM Model) 3.3V IC6 LINE +5V REG Tx ANALOG 32.256MHz SW IC10 Relay +3.3 RESET THERMAL HEAD 2 strobe OP-PANEL I/F 256kbit ROM 24MHz CPC +24V OSC TONE FET THON CPU TONE1 MONRX (Not Used) BUFFER PRINTER CONTROL 64Kbit SRAM +5V STB1,2 THLAT,THCLK, THDAT ASIC VOL ACK_EN IC1 H/SRX H/STX_MUTE Tr LED ON BELL +24V A/D MOTOR I/F CLK, SIG IMAGE PROCESSING JAM HOOK CIS IC7 MOTOR DRIVER SERIAL I/F RTC 3.3V chip PAPER RLY 32.768KHz To FLASH PROGRAMMER MOTOR SPEAKER HANDSET

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R10 C8 +2.0V IC2 R2 R5 Ref D1 R11 C14 C28 R14 R15 R22 R23 R26 R27 C4 +24VA 8 2 3 C7 4 1 R13 R18 C17 C21 C29 R41 ( ) ZNR1 L31 CN3 1a 2 b L19 R54 C43 ( ) SA1 4 3 5 RLY1 L32 SA2 POS1 2 +5VD 3 R38 1 PC2 4 CPC R35 BELL PC1 4 3 Analog Board C38 1 2 R45 +24V RLY1 2 D8 Digital Board RLY 13 L1 CN1 13 CN2 R219 D506 C216 R221 R220 C217 To IC5 Q7 1

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LCD (Chip on board type) ASIC CN2 CN206 IC1 CN1 GATE ARRAY IC1 KIN0~7 37 KEYS MATRIX XLED8, 9 XLED13 READ POSITION SENSOR DOCUMENT SENSOR LED DIGITAL BOARD OPERATION BOARD KX-FT938FX OPERATION BOARD: BLOCK DIAGRAM

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Block Diagram AC Input Input Circuit Rectifier Circuit C106 B A G + - Kick-on Voltage Circuit D110 R102 A-B Voltage Wave Form Converter Circuit C Q101 Surge absorber circuit 24V Output Circuit 24V D 0 C-D Voltage Wave Form Surge absorber circuit 6V Output Circuit GND 9~6V Control Circuit E H 0 E-F G-H Voltage Wave Form 0 IC101 O.C.L Over voltage F Error Detecting Circuit

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+5VA C84 1 5 C11 CN1 4 R10 C73 9 1 X1 C72 C90 C71 C77 CN8 BOND 32.7 Q14 R95 R94 R92 E C92 R93 D507 E Q13 C93 R90 7 J1 C85 1 2 CN9 1 L10 C116 C86 R76 L12 R75 R129 C127 R127 C144 R1 Q1 E C12 R2 CN4 R126 C126 C125 R128 C213 C76 C79 D502 R3 8 REF-CH C78 C82 1 C70 5 R157 R178 C75 C114 L11 IC15 R70 R96 R91 C91 R125 TEST X2 R209 R207 DG R101 L9 C214 C211 1 4 D501 C80 4 C81 C169 R159 C212 R210 C227 C228 C235 IC3 3 R71 R72 E Q10 C142 CN2 8 IC10 B 14 1 RA7 C129 1 A 7 9 11 C170 R160 17 PCB-CH R208 28 R211 R213 R212 C234 C83 R74 32 R73 1 CN3 IC7 2 CN5 5 1 YELLOW 10 R172 CN206 1 2 1 C102 R203 R227 L18 AUTO-CH R229 X3 1 CN6 IC6 32 17 C101 C31 R32 R33 IC2 C106 C104 R100 16 BLUE F2 16 1 IC16 3 15 8 CN10 J2 1 16 14 C103 PFUP1598Z A KX-FT938FX : DIGITAL BOARD (COMPONENT VIEW) PbF 0.25A 1 C100 IC4 L7 C251 1 C94 1 C236 C237 R142 C141 C117 IC12 1.25A F1 C74 Q2 E C115 8 1 R146 Q7 C10 1 R143 IC9 8 5 16 8 4 5

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144 C215 R218 C209 C210 R217 50 R220 C217 C219 C220 C222 R222 C243 31 R130 R38 L19 C242 37 30 C176 108 80 100 KX-FT938FX : DIGITAL BOARD (BOTTOM VIEW) 1 2 R80 C165 C87 R77 E C145 +5VA R131 7 CN8 D503 R78 Q11 +3.3V/BATIN R156 1 9 CN1 1 1 CN9 C146 R144 R145 R140 C143 PbF R141 R147 D504 C128 +24VF C158 AMON C162 R155 C13 C160 R18 C14 R111 C111 C113 Q16 C110 C216 R221 R233 D506 R219 C118 L20 C140 C112 R110 B R112 A C168 XNMI R158 +6V DG +24V R12 Q6 E R11 E E Q9 R19 R13 E Q5 Q4 +3.3VD R153 C159 R14 C163 C166 C164 R79 C119 R124 R123 R216 C208 E +2.5V/BATIN C17136 +2V FTG 1 C167 R161 R164 C161 C157 C156 C155 R58 R154 R20 R152 R16 R57 R15 L21 R17 AIN2 CN4 PG C172 ADR13 ADR14 ADR15 R39 C34 J5 E C173 R162 8 9 XTEST IC1 C175 R223 C229 D505 R224 C231 C230 C174 R163 C207 R215 C201 C202 R52 L3 R119 R120 R115 C241 C123 R118 C124 R121 R114 C122 R113 Q17 Q18 C120 2 E 1 CN10 CN2 R117 C33 R37 R36 R40 R214 IC5 C154 R151 C153 +2.5VD C32 R34 R35 C121 R116 C226 C221 C223 R225 C225 R226 C224 C232 L17 C233 R230 C238 C239 C240 R231 XRESET 109 C30 C151 R30 R150 IC7 CN3 11 1 L6 L4 7 C250 R228 R201 8 R31 2 1 5 16 A11 R56 C205 R165 R167 EYECLK R166 R204 R205 R206 D4 D5 R202 73 D3 A4 C178 C177 RD XCLK/EYEXY A12 EYESYNC A6 A3 A10 1 C206 A7 ROMCS D2 A0 A2 A8 WR C204 5 1 3 IC11 A1 MFCS A15 D1 C105 4 D7 D6 C150 RBA6 A17 A18 A16 A14 A13 A5 D0 C203 C50 1 C179 C51 R55 2 1 R51 R59 R54R53 +5V C200 R232 R200 +24LV A9 1 R102 CE1 CN206 PFUP1 5 9 8 Z CE2 10 A

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JJ2 L19 JJ4 JJ3 JJ1 D13 C52 R86 D15 C67 CN4 CN3 R41 ZNR1 CN2 RLY1 R54 C68 D8 Q10 C38 D3 1 FLT3 4 D2 T1 E R9 POS1 SA1 L33 R67 C54 R38 SW2 D12 R62 R45 D5 D4 8 C53 SA2 PC6 J28 J26 PC2 C28 SW1 C56 PFUP1547Z PbF A 5 D6 D7 J2 JJ5 C45 C42 PC5 PC1 PC4 T3 J6 J30 J18 J17 C4 SW3 D1 J29 J20 J24 J21 J3 C47 AUTO-CH J4 PCB-CH C15 C71 J10 J22 R26 R27 J27 J15 J16 J19 J25 C10 C6 J13 J11 J8 J14 J11 J7 1 CN1 16 KX-FT938FX : Analog Board (Component View)

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L34 C72 1 R8 L14 R47 R9 C3 +2V DA2 R39 C32 R60 R25 R33 C16 R29 C25 C11 R16 L2 R5 L1 R28 R31 Q3 E L13 R2 CN1 16 R30 PFUP1547Z PbF A C37 R50 C40 R57 C48 R56 L17 R49 C34 R42 C30 R32 L10 R40 C46 L16 R55 C41 R36 R44 L12 C36 C35 4 C24 IC1 1 C20 Q2 E Q4 R34 L11 C33 R46 R37 Q5 E R48 C31 C50 C51 E E Q1 R43 R77 C49 R63 R61 DA1 C65 R59 5 8 R21 C12 R17 R19 Q8 L6 R20 L5 E +24VA R51 Q6 C39 E R52 L15 Q9 E R72 C44 L3 C23 R24 C22 C64 R91 L7 Q13 E L4 C7 4 C9 R11 +12V C A PC4 E K K E PC5 A C C AK PC1 E KA R65 C60 R71 R70 Q11 E R35 L23 L21 L24 R58 L22 C66 R87 R88 C1 R1 C26 C27 C14 R15 R81 C17 R13 C13 C8 R10 R18 C5 5 IC2 8 1 R14 C21 R23 C19 R82 C18 R22 C2 C29 C63 R66 C69 3 4 C A PC6 E K PC2 2 1 Q7 E R69 C55 R68 R83 R85 R84 E C43 Q12 EXT.LINE L31 L26 L32 LINE D10 L25 KX-FT938FX: Analog Board (Bottom View)

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1 10 CN2 SW29 SW36 SW37 PLAYACK SW33 LED1 J15 RECORD ERASE AT.ANS A PFUP1560Z PbF J26 J13 J14 J12 FLASH J11 J10 SW4 1 SW9 2 SW14 3 SW19 SW27 S3 STOP SW3 C99 PAUSE COPY FAX/START SW1 SW6 * SW11 0 SW16 # SW17 CN1 MONITOR SW2 J17 J20 SW7 7 SW12 8 SW13 9 SW18 C3 J35 1 10 SW22 SW21 SW25 SW24 BROADCAST PCB-CH SW8 4 SW10 5 SW15 6 REDIAL J16 SW20 J8 J9 SW26 SW23 SW32 MENU SW31 S6 J3 J5 J4 SW30 S1 J7 SW28 S2 J6 J2 J1 SW35 S4 CALLER ID SW5 SW34 S5 KX-FT938FX : Operation Board (Component View)

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A MIC- Q4 C25 R47 R34 SW38 R48 R37 C28 C26 R39 R35 C22 E R21 C20 R17 C17 R23 1 R19 R16 R15 R25 R24 10 PbF R22 SW39 R20 C19 1 C1 C2 R1 R3 R4 R5 R2 R50 C15 1 44 C4 C9 12 11 IC1 33 34 C13 C16 22 23 R18 C14 R14 C7 C6 PFUP1560Z MIC+ 10 KX-FT938FX : Operation Board (Bottom View)

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(COMPONENT VIEW) T3.15A 250V C105 D103 C102 C103 D102 SRF 1678EK PRIMARY C109 D106 PC101 R111 C107 R106 T101 R109 D109 D204 SECONDARY C208 JP203 C202 D206 C201 VR201 1 D203 9 C205 R224 R223 JP201 R225 CN202 F101 R101 ZNR101 L101 L D104 D110 CN31 Q101 D105 R107 JP102 JP101 R105 D205 C110 D202 C203 D101 L103 Brown D201 C207 C108 Blue N C101 SEE SOLDER SIDE JP103 C106 PbF R202 (BOTTOM VIEW) KX-FT938FX : POWER SUPPLY BOARD JP202 SECONDARY D205 J204 Q203 R228 R226 Q201 Q202 R227 R122 5 4 IC101 R102 8 C123 1 R123 C121 C122 PROTECTION AGAINST RISK OF FIRE. REPLACE ONLY WITH SAME TYPE AND RATINGS OF FUSE. R229 PRIMARY C214 CAUTION FOR CONTINUED R121 R128 R221 R222

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4M DRAM IC4 4M FLASH FOR PROGRAM 2 3 4 5 24 25 26 27 MOTOR BLOCK +24V M F1 1.25A R1 Q1 BR4 820 R2 1.5K 1/2W A[4] A[5] A[6] A[7] RBA[0] RBA[1] RBA[2] RBA[3] RBA[4] RBA[5] RXE Q2 +3.3VD 10 11 12 13 16 17 18 19 20 9 A0 A1 A2 A3 A4 A5 A6 A7 A8 A9R DQ1 DQ2 DQ3 DQ4 DQ5 DQ6 DQ7 DQ8 D[0] D[1] D[2] D[3] D[4] D[5] D[6] D[7] +3.3VD IC2 A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 A16 A17 A18 +5V 220 Z0.1u C103 CN3 20V COM RM3 RM2 RM1 RM0 1 2 3 4 5 9 10 11 12 13 GND 8 7 DG RM3 6 A18 9 C100 RM2 5 C101 RBA[5] RD WR DG ( RM1 4 RM0 +24LV BR5 DG ( Z0.1u C104 BR1 NC R100 ) NC R101 ) D501 D502 IC7 DG 7 22 8 23 WE OE RAS CAS Z0.1u 6 NC6 21 NC21 C102 14 VCC-14 1 VCC-1 15 VSS-15 28 VSS-28 A[0] A[1] A[2] A[3] A[4] A[5] A[6] A[7] A[8] A[9] A[10] A[11] A[12] RBA[0] RBA[1] RBA[2] RBA[3] RBA[4] RBA[5] A[0] A[1] A[2] A[3] A[4] A[5] A[6] A[7] A[8] A[9] A[10] A[11] A[12] RBA[0] RBA[1] RBA[2] RBA[3] RBA[4] 20 19 18 17 16 15 14 13 3 2 31 1 12 4 5 11 10 6 30 32 A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 A16 A17 CE OE D0 D1 D2 D3 D4 D5 D6 D7 21 22 23 25 26 27 28 29 D[0] D[1] D[2] D[3] D[4] D[5] D[6] D[7] +3.3VD D[0] D[1] D[2] D[3] D[4] D[5] D[6] D[7] D0 D1 D2 D3 D4 D5 D6 D7 WE VDD VSS 7 8 24 10K R3 10K 14 15 3 BLEEDER_ON 2 1 PG 16 (1) (2) 680 2W R172 PG +3.3VD +24VF +24VF 8 7 6 5 1 2 3 4 K0.1u THERMAL HEAD BLOCK +24V CE1 R102 10K J2 CE2 +3.3VD (3) (4) (5) (6) Q7 5.6K C10 R10 ROMCS MFCS IC11 1 INB 2 INA VCC 5 3 4 OUT 4.7K R12 2.2K GND R11 C105 DG Z0.1u DG C11 ( ) NC (7) A[7] A[6] A[5] A[4] A[3] A[2] A[1] A[0] PG Q4 +2.5VD Q5 Q6 RXE TH-TMP CN4 COM LATCH STB1 GND +3.3V TM CLOCK GND STB2 DATA COM 1 PG R13 2 100 100 +3.3VD R14 3 4 5 6 C12 Z0.1u THLAT STB1 XRESET +3.3VD +2.5VD RBA6 L21 7 8 R15 100 THCLK C179 Z0.1u C178 Z0.1u C177 Z0.1u RBA[5] RBA[4] RBA[3] RBA[2] RBA[1] RBA[0] A[12] A[11] A[10] A[9] A[8] HEADON (8) R16 9 100 100 STB2 THDAT NC NC STB1 STB2 (9) (10) (11) R17 10 11 NC J100p J100p J100p C150 R150 2.2K VSS 108 VDD3.3V 107 XRESET 106 STB3 105 STB2 104 STB1 103 RBA6/IOP96 102 RBA5/OP 101 RBA4 100 RBA3 99 RBA2 98 RBA1 97 RBA0 96 ADR12 95 ADR11 94 ADR10 93 ADR9 92 ADR8 91 ADR7 90 ADR6 89 VDD2.5V 88 VSS 87 ADR5 86 ADR4 85 ADR3 84 ADR2 83 ADR1 82 ADR0 81 XWR 80 XRD 79 XR0MCS 78 DB7 77 DB6 76 DB0 75 VDD3.3V 74 VSS 73 ) ) ) R18 C13 R19 R20 C14 +5V C153 Z0.1u C151 Z0.1u 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 C176 Z0.1u 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 VSS 37 ( ( ( DG +5V 4.7K R30 XWDERR MOTOR POSITION SENSOR CN5 2 1 THDAT THCLK THLAT R31 1K J100p C30 R151 4.7K MOT_POS MOT_POS RM0 RM1 RM2 RM3 RXE C154 Z0.1u CUT_POS DG +5V 4.7K R33 DG CUTTER POSITION SENSOR CN6 2 1 ACK_EN CISON R32 1K J100p C31 RLY CUT_POS KSTART KLATCH KSCLK KTXD KRXD OPRESET R152 +24V +24V +5V 4.

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(1) NC 33 1/2W ) C55 ( ) NC R65 R66 C3p +5V R71 ) ( NC NC A K R70 ( ) NC R69 ( NC NC R68 ( ( NC Q10 ) R67 NC R10 75K C8 J270p 10K +24VA PC4 C E NC +2.0V R2 C54 50V10u NC NC C56 ( ) NC ( ) Q11 6.8K C60 ) NC D12 L7 BEAD 12K (2) R72 ) C69 ( AG (3) T1 R5 0 D1 C4 50V4.7u C7 4.7V IC2-1 1 8 2 3 C13 R13 D10p R18 56K 56K C17 K0.039u C21 K0.039u R81 5.6V 5.6V C29 K0.01u 0 D2 300:600 4 3 2 (4) C63 Z0.1u 4 390 1/4W 6 1 K0.1u C26 L4 BEAD R26 +12V AG AG R82 0 BEAD D3 L3 AG ( ) NC C27 R27 NC R11 1.8K 75K R14 C9 J270p K0.047u R15 0 Q13 (5) R87 ) C66 C18 ) NC R22 0 3.6K C14 ( AG ( AG NC ) ( ) ( ) NC (6) (7) (8) K0.01u AG 3.9K C19 R23 C64 +5V R24 +24V L2 0 C23 C11 K0.1u R16 D10p 24K C22 ( ) NC R91 C28 0 50V4.7u 300K J120p ( CN1 +24V AG +5V PAPER LINETX TONE1 RLY CPC JAM 1 2 3 (9) 6 7 5 C32 R39 J39p 750K +5V +2.0V IC2-2 4 5 AG L12 R47 0 C12 6 R17 47K R21 39K C25 K0.022u 0 K0.1u 7 8 9 IC1-1 1 8 2 3 (10) C35 ) NC ( 4 R36 2.2K C31 Z0.1u 0 P_SHORT 10 AG NC 1K 2A BELL/DC N 11 HOOK 12 1A2K ( DA2 ) AG L1 LINERX 13 MONRX 14 H/STX_MUTE 15 H/SRX 16 L13 (11) (12) R29 5.6K R33 C72 L34 JJ 5 Z0.1u 1 SW 1 2 4 1 3 L10 BEAD NC R32 36K C30 K0.1u (13) PAPER SENSOR SW JAM SENSOR SW SW 3 2 4 1 3 Q2 R28 12K Q3 ( ) NC C2 K0.01u (PU AT DIGITAL BOARD) AG C5 R30 K0.01u (PU AT DIGITAL BOARD) AG ( 6.8K AG AG FG2 AG +5V +24VA +24V R34 0 ( NC )Q4 ) HOOK SENSOR SW SW2 1 2 3 (14) R37 Q1 L6 +2.0V 10K 0 ) ) NC R25 220K R19 R31 330K C16 10K ( R8 R1 100 K0.01u 4 5 6 +12V ( ) L5 AG ( 35V33u C71 C24 Z0.1u AG AG ) Q5 NC 6.3V47u R9 C10 (PU AT DIGITAL BOARD) AG 0 16V10u C20 Z0.1u R20 220K C15 ( ) NC C1 AG AG AG AG 10K C3 C6 ( NC NC (1) +5V ) R77 NC +5V R83 1K R86 NC C68 ) ) ( NC ( ( C A K PC6 2 D10 3 4 NC NC FAX TX signal FAX RX signal E C E A PC5 D13 ) Q12 1 (2) K ( NC ) ) C67 R84 D15 ( NC ) ( ) NC C52 K680p ) R85 NC ) R88 NC NC ( ( Q9 (3) (4) AG ( AG ( C53 K680p R41 JJ1 L31 ( 50V2.2u L19 1 ) NC 300/310V TO TEL LINE CN3 1 a 2 b (5) (6) R54 NC RLY1-1 ( 220 1/4W C43 R35 22K 1 4 ) 4 3 5 L32 W5NL5T 3000V SA1 2 3 ZNR1 4 POS1 JJ2 R38 47K 1/2W 2 3 NC C38 250V1u AG (8) PC1 C E AK KA ( JJ4 L25 NC ) ( NC ) SA2 (7) ( PC2 JJ 3 K0.01u NC +5V (PU AT DIGITAL BOARD) ) L33 TO EXT. TEL CN4 NC D4 5.6V AG D5 5.6V R45 L26 () 1 b 2 a ( 22k 1/2W ) NC (9) (10) R48 4.7K C50 K0.056u Q8 R63 1M R61 DA1 T3 NC 3 R62 NC ) ( NC ) NC ) NC 4 1A 2K 1K2A ) () ( ) 2 1 ( R59 ( NC 6 C65 ( +24V AG AG (11) (12) 10K K0.1u D8 1 C34 J120p R42 C47 820K R57 6.3V47u 330 1.5K R55 L17 0 +5V Q7 AG IC1-2 6 5 R49 C36 D10p R50 +2.0V 10K C41 K0.027u AG (13) 2.2K 7 L23 L21 FLT3 8 10K C40 K0.027u 2 R60 C51 RLY1-2 NC CN2 1 HSMIC 2 HSSP+ 3 HSSP4 HSMIC + 220K ( ) NC R40 R44 C37 1 2 3 4 L14 K0.01u R52 22 1.5K C46

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(1) +5V ) R77 NC +5V R83 1K R86 NC C68 ) ) ( NC ( ( C A K PC6 2 D10 3 4 NC NC FAX TX signal FAX RX signal E C E A PC5 D13 ) Q12 1 (2) K ( NC ) ) C67 R84 D15 ( NC ) ( ) NC C52 K680p ) R85 NC ) R88 NC NC ( ( Q9 (3) (4) AG ( AG ( C53 K680p R41 JJ1 L31 ( 50V2.2u L19 1 ) NC 300/310V TO TEL LINE CN3 1 a 2 b (5) (6) R54 NC RLY1-1 ( 220 1/4W C43 R35 22K 1 4 ) 4 3 5 L32 W5NL5T 3000V SA1 2 3 ZNR1 4 POS1 JJ2 R38 47K 1/2W 2 3 NC C38 250V1u AG (8) PC1 C E AK KA ( JJ4 L25 NC ) ( NC ) SA2 (7) ( PC2 JJ 3 K0.01u NC +5V (PU AT DIGITAL BOARD) ) L33 TO EXT. TEL CN4 NC D4 5.6V AG D5 5.6V R45 L26 () 1 b 2 a ( 22k 1/2W ) NC (9) (10) R48 4.7K C50 K0.056u Q8 R63 1M R61 DA1 T3 NC 3 R62 NC ) ( NC ) NC ) NC 4 1A 2K 1K2A ) () ( ) 2 1 ( R59 ( NC 6 C65 ( +24V AG AG (11) (12) 10K K0.1u D8 1 C34 J120p R42 C47 820K R57 6.3V47u 330 1.5K R55 L17 0 +5V Q7 AG IC1-2 6 5 R49 C36 D10p R50 +2.0V 10K C41 K0.027u AG (13) 2.2K 7 L23 L21 FLT3 8 10K C40 K0.027u 2 R60 C51 RLY1-2 NC CN2 1 HSMIC 2 HSSP+ 3 HSSP4 HSMIC + 220K ( ) NC R40 R44 C37 1 2 3 4 L14 K0.01u R52 22 1.5K C46 C48 L15 0 K0.01u R56 0 +5V 7 6 5 AG 47K 6.3V47u R51 C42 C44 L16 K4700p D6 C39 AG C45 16V10u AG R43 AG 330 D7 AG C49 0 K0.1u 18K K0.01u (14) L11 C33 R46 0 Q6 ( ) NC R58 L22 L24 0 KX-FT938FX : ANALOG BOARD SCHEMATIC DIAGRAM

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+5VA DB6 DB5 DB7 DB4 R/W RS E V0 VDD +5VA +5V 680 R34 VSS CN2 10 +5V R19 4.7 C17 Z0.22u 9 8 7 5 4 3 2 R47 C28 DG 3.3K 6.3V100u 2.2K AG ( ) NC R35 C25 C99 J180p R39 560K 1 6 TO LCD +5V R37 Q4 B1ABDF000026 6.3V220u 39K C26 K0.01u C22 K0.01u AG ( ) NC TO MIC MIC+ MICR17 R16 TO DIGITAL K1KA10B00215 Z0.1u Z0.1u +5V CN1 MICIN +5V DG KSTART KLATCH KRXD KTXD KSCLK 1 2 3 4 5 6 7 8 R48 C1 C2 C3 AG AG LED1 R1 R2 0 R18 18K R24 TXD 33 RXD 32 SCLK 31 RESET 30 D7 29 D6 28 D5 27 D4 26 E 25 RWB 24 RS 23 2.2K ( ) 150 0 R14 R15 R25 820 1K R3 R4 R5 0 0 0 K330p J120p 0 OPERST 9 NC 10 C13 K0.01u K330p C14 270 J120p K330p ( ) C4 C6 C7 C9 ( ) +5V +5V R50 33 +5VL KSL0 KSL1 KSL2 KSL4 KSL3 1 KSL2 2 LED6 3 KIN1 4 LED7 5 XLED8 6 XLED9 7 KIN2 8 KIN3 9 XLED10 10 KSL3 11 KIN4 C15 Z0.1u 34 LATCH 35 START 36 LED2 37 LED3 38 LED4 39 VSS-39 40 VDD-40 41 LED5 42 KIN0 43 KSL0 44 KSL1 IC1 LED1 22 XLED15 21 XLED14 20 XLED13 19 VSS-18 18 VDD-17 17 XLED11 16 XLED12 15 KIN7 14 KIN6 13 KIN5 12 R20 4 1 2 R22 100 C19 [4] Z0.1u C16 +5VL K0.01u 4.7K 3 [0] SW39 DOCUMENT TOP SW +5V KIN0 KIN1 KIN2 KIN3 KIN4 KIN5 KIN6 KIN7 R21 R23 4.7K 1 KIN0 KIN4 KIN3 KIN2 KIN7 KIN1 KIN6 KIN5 4 3 100 K0.01u 2 SW38 C20 TP1 FAX/START * 0 # NAVI LEFT BOARDCAST SKEY 6 ERASE CN5 SW1 SW6 SW11 SW16 SW21 SW26 SW31 SW36 TP2 KSL0 COPY 7 8 MONITOR NAVI DOWN SKEY 3 MENU PLAYBACK SW2 SW7 SW12 SW17 SW22 SW27 SW32 SW37 KSL1 STOP 4 9 PAUSE NAVI UP SKEY 2 AUTO ANSWER RECORD SW3 SW8 SW13 SW18 SW23 SW28 SW33 SW29[3] KSL2 1 2 3 FLASH NAVI RIGHT SKEY 5 SW4 SW9 SW14 SW19 SW24 SW34 KSL3 CALLER ID 5 6 REDIAL NAVI CENTER SKEY 1 SKEY 4 SW5 SW10 SW15 SW20 SW25 SW30 SW35 KSL4 KX-FT938FX : OPERATION BOARD SCHEMATIC DIAGRAM

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C110 1000p 0V T101 TRANS D105 C108 1000p /1k C202 1000p/1k CN202 D202 R221 R224 L103 5.6k 1k 1 2 (R202) 3 4 5 6 0V (C207) 8 R111 D106 3 6 0V R107 100k/2 R106 56/450 D102 D103 D101 C106 D104 47/2 C107 47p/1k 24V 24V 24V GND GND GND 6V 6V 220/35 R229 R109 10 R105 D110 0.22/2 R121 G D C201 1k PC101 R222 Q101 10k S R223 C205 1k 0.1/25 18k Q203 2.2k (R206) VR201 5k 3300p 10k R128 0.1 C103 1000p C105 R102 1.8K 180 4 5 D204 R123 R122 100 D109 D205 (Q202) 1k Q201 C102 R225 D206 R228 7 C121 L101 4700p 2 D202 (C208) (R227) 9 P-Cont 470/16 (D203) C203 IC101 7 8 22 47/35 C123 C109 0.1 C124 ZNR101 750V R101 1M 1/2 C101 T3.15A 250V F101 0.1 GND PC101 0.01 1 C122 0.1 25 0V 0V 1 L CN31 N KX-FT938FX : POWER SUPPLY BOARD SCHEMATIC DIAGRAM

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KX-FT938FX-B EU SVC 003 025 20060919 01.00 en XML Service Manual 2 KMEFD KMF0609046CE index.html NEW