Casio Qt 7300 Service Manual
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Page 61
Ñ 59 Ñ FDD CONN LPT K/B & MOUSEIR CONN PD2 PD1 PD0 PD3 AFD- ERR- INIT- SLIN- STB- PD0 PD1 PD2 PD3 PD4 PD5 PD6 PD7 ACK- BUSY PE SLCT PD0 PD1 PD2 PD3 PD0 PD1 PD2 PD3C189 C198 C199 C208 180PX4 C207 C239 C240 C246 180PX4 C215 C197 C179 C180 180PX4 C258 C181180P C257 C287 C286 180PX4 PD4 PD5 PD6 PD7 PD4 PD5 PD6 PD7 SLIN- INIT- AFD- STB- BUSY ACK- PE SLCT INIT- AFD- STB- BUSY ACK- PE SLCT ERR-BEADL48 CN23 PD4 PD5 PD6 PD7 SLIN- INIT- AFD- STB- BUSY ACK- PE SLCT ERR-1 2 3 4 2 4 6 8 10 12 14 16 18 20 22 24 26...
Page 62
Ñ 60 Ñ COM2CN19 L49 BEAD2 4 6 8 10 2 4 6 1 3 5 2 4 6 1 3 5NDSR2 NRTS2 NCTS2 MRI2 MDCD2 NRX2 NTX2 NDTR21 3 5 7 9 U3VCC VCC VCC V+ V- T1OUT T2OUT T3OUT T4OUT R1IN R2IN R3IN R4IN R5IN SHDN#11 13 17 2 3 1 28 9 4 27 23 18 25 12 14 15 16 7 6 20 21 8 5 26 22 19 24 10C305 0.1U C289 0.1U NRTS1 NTX1 NDTR1 NRX1 NCTS1 NDSR1 NDCD1 NRI1 VCC VCC VCCC1+ C1- C2+ C2- T1IN T2IN T3IN T4IN R1OUT R2OUT R3OUT R4OUT R5OUT EN VSSVCC VCC V+ V- T1OUT T2OUT T3OUT T4OUT R1IN R2IN R3IN R4IN R5IN SHDN# C1+ C1- C2+ C2- T1IN T2IN T3IN...
Page 63
Ñ 61 Ñ JP12 2 4 6RX85+ NTX4 TX44 RX85- NDTR4 DTR441 3 5 HEADER 3´2 JP10 2 4 6TX85+ NRX4 RX44 TX85- NDCD4 DCD441 3 5 HEADER 3´2 JP13 VCC U9 W83877F ( I/O Port=250H )RWC INDEX MOA DSB DSA MOB DIR STEP WD WE TRK0 WP R D ATA HEAD DSKCHG STB PD0 PD1 PD2 PD3 PD4 PD5 PD6 PD7 ERR ACK BUSY PE SLCT SLIN INIT AFD GND GND GND GND RTSB TXB DTRB RXB CTSB DSRB DCDB RIB87 81 79 84 83 80 89 82 86 85 78 77 74 88 76 19 9 10 11 12 13 14 16 17 29 26 24 27 28 22 21 20 25 40 65 90 45 43 46 42 47 48 49 50 A0 A1 A2 A3 A4 A5 A6...
Page 64
Ñ 62 Ñ 6 SPKR 18 BEEP5U21C 6 74HCT1412 11 13U24D 74F32R238 4.7KR207 R20633 33 33 Q5 2N3904SPK C205 0.1UJP6 1 2 3 4 HEADER 4 BU1 21 BUZZERVCC VCC VCC VCC3 VCC ST# RST# PST VCC VCCR202 7 IDEACTP- 7 IDEACTS-D3 D1 1N4148 1N4148R43 33IDEJP5 HEADER2X1 HEADER2X1R42 300 21 WDTRSTR267 10K C340 0.1UU26 1 2 3 4 1 28 7 6 5 PBRST# TD TOL GND DS1232 CN8OCSPIC R268 1K C270 0.1UU22B 74HCT145VSB 34 14 145VSB 56 U23C 7406 983VSB R5 1KPWRGOOD 1 PWROK 3,6 U23B 74063VSB 34 5VSB14 5VSB14U22D 74HCT14 98R198 1K RSMRST- 6 C271...
Page 65
Ñ 63 Ñ C307 0.1U R245 10 C352 0.1U R278 10 ADGND470U/25V 470U/25V C45C46 C51 100U/25V-NC +12V L25 BEAD C438 0.1U C308 0.01U R247 R246 825K 825KLM1877 ADGND 3 47U C371+ + - - 7 6 1 8 92 10 4 5 11 12 13 14U31 C432 100P C433 100PR255 R256825K 825KC321 0.01UL/R L/L S/LS/R ALJP18 1 3 52 4 6 HEADER 2X3AR BEAD L29 ADGND HEADER 5X2H MICIN LINEL LINER AL AR MICIN L21 R231 R230 8.2K C291 10U C247 10UC439 1U +12V Q9 VCC SNDVDD C283 0.1U C437 0.1U AD0 AD0 16 AD1 AD1 15 AD2 AD2 14 AD3 AD3 13 AD4 AD4 12 AD5 AD5 11...
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Ñ 64 Ñ VTT VTTRP6 10P8R 5610 9 8 7 6 1 2 3 4 5HD1 1,2 HD12 1,2 HD10 1,2 HD6 1,2 1,2 HD15 1,2 HD4 1,2 HRESET- 1,2 HA29VTT VTTRP5 10P8R 5610 9 8 7 6 1 2 3 4 5HA27 1,2 HA26 1,2 HD0 1,2 HD8 1,2 1,2 HA18 1,2 HA24 1,2 HA23 1,2 HA31 VTT VTTRP9 10P8R 5610 9 8 7 6 1 2 3 4 5HA13 1,2 HA10 1,2 HA25 1,2 HA22 1,2 1,2 HA5 1,2 HA3 1,2 HA8 1,2 HA11 VTT VTTRP11 10P8R 5610 9 8 7 6 1 2 3 4 5HA16 1,2 HA9 1,2 HA6 1,2 BPR1- 1,2 1,2 HA4 1,2 HA14 1,2 BNR- 1,2 HA7 VTT VTTRP13 10P8R 5610 9 8 7 6 1 2 3 4 5HREQ0- 1,2 HREQ4- 1,2...
Page 67
Ñ 65 Ñ 4.7K R345 6,15 DRQ54.7K R338 6,15 DRQ74.7K R349 5,8,15 DRQ34.7K R88 3,19 GDEVSEL-4.7K R85 3,19 GSTOP-4.7K R137 3 RBF-4.7K R121 3 PIPE- VCC3 4.7K R142 3,22 PGNT4-4.7K R132 3,15 PGNT0-4.7K R146 3 PGNT2-4.7K R95 3,15 PGNT1- VCC3 4.7K R149 5,8 A20GATE4.7K R159 6,8 KBRST-4.7K R141 4,6,16 SMBCLK4.7K R145 4,6,16 SMBDATA VCC3 4.7K R344 5,8,15 DRQ14.7K R347 6,8,15 DRQ04.7K R333 5,8,15 DRQ24.7K R341 6,15 DRQ64.7K R93 3,19 GIRDY-4.7K R3 3 ADSTBA4.7K R120 3,19 GTRDY-4.7K R89 3,19 GFRAME- VCC3 4.7K R180 3,6...
Page 68
Ñ 66 Ñ GND BRSTDRV +5V IRQ9 -5V DRQ2 -12V ZEROWS- +12V GND SMEMW- SMEMR- IOW- IOR- DACK3- DRQ3 DACK1- DRQ1 REFRESH- SYSCLK IRQ7 IRQ6 IRQ5 IRQ4 IRQ3 DACK2- TC BALE +5V OSCISA GND MEMCS16- IOCS16- IRQ10 IRQ11 IRQ12 IRQ15 IRQ14 DACK0- DRQ0 DACK5- DRQ5 DACK6- DRQ6 DACK7- DRQ7 +5V RMASTER- GND GND GND +5V +5V GND GND AD31 AD29 3V 3V AD27 AD25 CBE3- AD23 AD21 AD19 3V 3V AD17 IRDY- DEVSEL- SERR- AD15 AD14 AD12 GND GND AD10 AD8...
Page 69
Ñ 67 Ñ OSCVGA 19 DCLK0 DCLK1 DCLK2 DCLK3 DCLKREF 27P C11 10P-NI 10P-NI C13 10P-NI C15 10P-NI C21 C22 PICCLK 1 CPUHCLK 1 BXHCLK 2 DCLK0 4 DCLK1 4 DCLK2 4 DCLK3 4 DCLKREF 2 PCLK0 15 PCLK1 15 PXPCLK 5 BXPCLK 3 SNDPCLK 12 LANPCLK 22 OSCPX4 5 24MHZ 8,10 48MHZ 5 OSC781 18 OSCPIC 21 OSCISA 15 C314 10P R240 22 11C281 10P R236 22 8C342 10P C147 27P C142 27P C188 0.1U C177 0.1U C169 0.1U C158 0.1U DCLKREF=5345 HIL DCLK0=3242 HIL DCLK1=3243 HIL DCLK2=3243 HIL DCLK3=3243 HIL CFUHCLK=4176...
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Ñ 68 Ñ R260 10K VCC L2 1UH C50 1000U C331 1000P R251 4.7K Q2 76129 Q7 76129 UG1 R376 LG1 R375 0 0 U30 C297 1U +12V 23 OCSET1 8 PWGOOD 27 UGATE1 26 PHASE1 25 LGATE1 24 PGND 22 VSEN1 21 FB1 20 COMP1 13 7 6 5 4 3 12 152 1 0R373 UG247K R2731000P C344 Q1 76129 C338 1U 9 PH2 L1 5.2UH R259 5.1K C24 1500U C9 1500U C379 1U VCC3 VTT C57 1000UC395 1UC402 1U 3055 Q6 C378 1UC400 1U2.5VR279 3.3K C309 1U R272 5.1K UG3D10 MBR2535 10 11 18 C368 0.1U 19 0 R374 R280 210K R288 1.8K10PC357R-NI R283 VCC 16 14 SS VID0 VID1...