HP LaserJet Pro 300 Service Manual - Page 140

CPU/ASIC diagrams Figure 2-10 CPU diagram 7 6 5 +3.3VA (ASIC-8p) (A505) PLLENBL PFULLS R60 3.3K,0.063W 1 2 100 (ASIC-6p) ASICCLK > 12 12 (A505) POUTS 1 NF101 1 FB 2 R10 430,0.1W (A505) 2 1 FSRPRSS 2 3 C69 C74 (A503) TNRRSPWM 4 (A504) RDSLED 5 100P,50V/NOTMNT 100P,50V/NOTMNT ITBLLED 6 (A504) RDSGAIN0 R49 100,0.063W 7 C8 (A504) 1 RDSGAIN1 R48 2 100,0.063W 8 (A504) 1 2 0.1U,25V 9 +24VA (A504) RBLSGAIN0 R65 1 2 10 (A504) RBLSGAIN1 R50 100,0.063W 1 2 11 2 1 R54 24K,0.1W 24ALIVE (A503) RDOORS 100,0.063W 12 (A504) ITBTS 13 MPTPS 14 (A504) OPTPKSL R46 1 2 15 (A505) OPTPS 100,0.063W 16 (A505) 17 2 12 R35 3.3K,0.1W C106 (A504) (A504) DEVHPS MPTPREGS 18 19 0.01U,50V CSTPS 20 +3.3VA (A504) 21 1 CP1 1 FCT check Check Pad 1 2 R12 47K,0.063W R1 2 1 1K,0.063W (A504) (A505) OPTPREGS DUPFANON 22 23 1 R21 2 100,0.063W 24 25 J2 1 J1P Check Pin LC-2-G-WHT/NOTMNT IOTR IOTT 26 > +3.3VA +3.3VA 10K,0.063W J110 1 J4P J110 2 J4P J110 3 J4P J110 4 J4P 3 DA2 +3.3VA DAN217U/NOTMNT 1 2 R30 1 2 R32 1 2 1K,0.063W IOTR 3 +3.3VA DA1 DAN217U/NOTMNT 1 2 R31 1 2 1K,0.063W IOTT > J111 1 J5P J111 2 J5P J111 3 J5P J111 4 J5P J111 5 J5P R17 1 2 1K,0.063W R16 1 2 1K,0.063W R18 1 2 1K,0.063W R19 1 2 1K,0.063W R14 1 2 1K,0.063W MODE0 MODE2 P80 P81 TCK (A504) TCK PREGS 2 J1 JNT3 EEPROM IC4 1 A0 2 A1 3 A2 4 GND VCC 8 WP 7 SCL 6 SDA 5 12 +3.3VA R530 2.7K,0.1W C522 0.1U,25V CHG R1EX24004ASAS0A 1 2 1 2 +3.3VA R531 2.7K,0.1W > SW1 B1 A1 D1 C1 KSHS636AT R304 +3.3VA 10K,0.063W 2 1 JNT1 P81 R305 TESTPRT 2 1 10K,0.063W J1 2 27 99 RLD 28 (A505) R59 REGIMB 100,0.063W 29 1 2 (A504) REGIMA R64 1 1020,0.063W R13 (A504) 30 2 0,1A 31 98 1 CP8 check 97 1 CP3 check 96 1 CP4 check 95 1 CP5 check 94 1 CP6 check 93 1 CP7 check 92 1 R215 1 2 0,1A 32 33 (ASIC-11p) (ASIC-12p) (ASIC-13p) (ASIC-14p) (ASIC-15p) (ASIC-16p) (ASIC-17p) (ASIC-18p) (ASIC-19p) (ASIC-20p) ADB9 ADB8 ADB7 ADB6 ADB5 ADB4 ADB3 ADB2 ADB1 ADB0 88 89 90 91 87 4 CPU IC1 86 85 84 83 82 81 3 2 1 (A503) 80 79 12 C11 0.1U,25V 78 77 N.C. 76 1 check CP12 WAKEVC +3.3VA R4 150,0.1W/NOTMNT 1 2 R3 3.3K,0.1W 1 2 C3 22P,50V 12 2 X501 1 12 C4 22P,50V C7 12 0.1U,25V R26 1 2 1K,0.063W R25 1 2 +3.3VA 1K,0.063W C13 F 12 0.1U,25V IC7 1 CD 2 VSS 3 MR VDD 5 VOUT 4 C9 0.1U,25V 12 RESET IC NJU7704F29A-@-#ZZZB C10 12 0.1U,25V/NOTMNT 75 RESET 74 WAKEENG (A503) 73 CCRT E 72 R69 100,0.063W VCTRLOFF (A503) 2 1 (A505) 71 FSRD (A505) 70 R27 1 2 33,0.063W WR (ASIC-21p) 69 R28 1 2 33,0.063W RD (ASIC-22p) 68 R29 1 2 33,0.063W ALE (ASIC-23p) 67 R195 2 3.3K1 ,0.063W ASICRST (ASIC-26p) 66 PWRSWON (A505) 65 R7 1 1020,0.063W FEEDMA (A504) 64 R199 1 1020,0.063W FEEDMB (A504) 63 RSCPR (A504) 62 RDSCPR (A504) 61 RSLED (A504) 60 R8 1 1200,0.063W FEEDMI0A 59 R34 100,0.063W 1 2 FEEDMI1A (A504) 58 R9 100,0.063W 1 2 FEEDMI0B (A504) (A504) 57 R22 1 2 100,0.063W FEEDMI1B (A504) D 56 FDOORS (A504) 55 ZEROX 54 53 52 51 R56 R632 R622 R1982 2 100,0.063W 1 100,0.063W 1 100,0.063W 1 100,0.063W 1 REGIMI0A REGIMI1A REGIMI0B REGIMI1B (A505) (A504) (A504) (A504) (A504) 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 TNR4 SUBTH MAINTH SUB2TH 12 C12 (A503) (A505) (A505) (A506) (A503) (A503) (A503) 0.1U,25V +3.3VA R6 1 2 47K,0.063W R11 1 2 47K,0.063W TNR3 TNR2 TNR1 ASICOFF (A505) ITBLS (A504) > C JNT2 1J 2 REGS P80 (A504) 1: CPU 2: ASIC 3: VIF, LSR, SCN, HVT,TG 4: DRIVER PCA, SENSOR MODE0 MODE2 5: FSR, LVT, DUP , OPT, ENV DEVSL 6: FSR +24A: always alive +24B: Shutdowned by interlock SW B Stand-by +3.3VA +3.3VB ON ON Sleep ON OFF OFF ON OFF 1: CPU A CD1-3 116 Chapter 2 Solve problems ENWW