Brother International 8250P Service Manual - Page 187
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1 2 3 4 5 6 NCU1 P1 4 B1 2 B- PH +5V +24V Q2 1 DT C1 1 4 YK M5 V +24R + - + - C ML H 2 10 12B 1 #19 16 4 3 #17 C3 1 #10 C8 6 M5 V C1 3 8 N J M3 5 8 7 4 HC4 0 5 3 CC1 0 4 KI 3 2 4 CC5 0 C1 0 4 12 678 11 C1 4 2 CC3 9 1 R1 9 0 C ML L 2 4 RET C1 4 7 R1 8 7 M0 V 8 A M0 V C1 4 0 R1 8 8 M5 V M0 V +24V M0 V R8 3 R8 2 7 5 K A MI C + 6 * R7 6 3 PL S 12B MI C - 7 C1 3 9 R1 8 6 #19 5 +5V A * R8 0 A * R7 9 C1 4 8 R1 8 9 C1 3 7 N J M3 5 8 R1 8 5 R1 8 4 #19 N J M3 5 8 C1 3 6 CC1 0 4 M0 V (O P O N U MC 4 N Q3 6 2 1 3 ) R201 4 +24R 5 C3 4 CC1 0 4 10K R1 9 1 1M 4 5 - Vi n Vo 1 2 Vr e f 8 Vo 2 #11 1 CD 3 +Vi n A L 1 B L M1 1 A 2 0 L 3 B L M1 1 A 2 0 SP 1 2 2 4 9 5 B 6 7 11 T L OF 12A C1 C6 2 CC1 0 3 B S0 V 12A RL 1 RL 2 R7 7 0 73C 73C R7 8 Q2 0 TL SL TL SW DT C1 1 4 YK 73B 12A M0 V M0 V M0 V M0 V C8 3 CC6 8 1 MOV A * R9 4 13 14 R1 0 0 1K 1/ 10W #10 + 12 KI 3 2 4 M0 V A * Z D3 A * Z D4 ( ) R9 8 D4 ( ) A * C8 9 A * R9 3 C8 2 CC1 0 4 +24R R9 5 10K 72B Z D5 MT Z 8 . 2 MOV * #16 TEL 10 CNT 1 15 C 0 NOT A S S Y 12A 1 A * R4 1 2 C3 2 #17 7 4 HC4 0 5 3 MOV TL SL R3 2 0 M0 V TXO 45C 13A S P ON T ADH 10 11 2 CNT C 15 0 #17 7 4 HC4 0 5 3 - A C ML H 11 12B #16 7 4 HC 4053 42C N J M2 1 1 3 V+ GND 6 C6 4 7 +5V CC1 0 4 +5V S0 V C9 10 / 6. 3V S0 V C1 1 1 0 0 / 6 . 3 V Q1 7 DT C1 1 4 YK S0 V S P A MP 76C 6 4 S0 V V+ GND C1 2 3 5 100 / 6. 3V - I N OUT 7 #18 2 1 + I N GA I N 8 GA I N M0 V N J M3 8 6 L2 B L M1 1 A 2 0 P7 B2 B- PH BL ACK S0 V B NOT A S S Y NOT A S S Y A A * R1 0 6 2 A * R9 9 C8 5 CC1 0 3 B 7 4 HC HSPL Y 4053 11 12A 14 C CNT 1 13 71B 71B RL 1 1 3 1 RL 2 1 2 0 CNT C 14 * R3 3 0 RI N 41B 73C 1 * 74 1 12 0 RI N 74C Q1 8 DT C1 1 4 YK R5 3 A A * * #10 + 3 1 0 0 K MU T E R7 5 R1 0 5 KI 3 2 4 RNG 13A C4 9 CC1 0 4 12A M0 V D G S C9 0 CC1 0 4 R1 0 7 10K * R3 6 0 DAREC 12A Q1 9 C A * R1 0 4 2 SK2 0 8 R1 9 4 M0 V AREF 43B PRI NG R3 1 20K * R3 5 50 12A RI NGO R4 2 150K 31 9 CNT 5 0 #17 C3 3 C4 R4 0 75K CC1 0 4 R3 9 * R3 8 S P A MP * R3 7 75B C S0 V S0 V * R3 4 C4 7 4 HC4 0 5 3 390 ADL C 3 11A C3 0 3 1 CNT * #16 7 4 HC4 0 5 3 M0 V 15C V OL 1 6 1 () DPS 6 12B EAT 1 12B 2 +5V * R1 1 8 P OL 12A M5 V 16 * #16 7 4 HC4 0 5 3 67 8 C2 9 MOV 9 MS L A ) M F C 6 6 5 0 M C A S S Y MF C 9 5 5 0 15C PPF2 7 5 0 MF C 4 3 5 0 MF C 4 6 5 0 ) MF C 9 0 5 0 FAX- 8 2 5 0 P NOT ASSY V OL 3 Q1 4 DT C1 1 4 YK 15C V OL 2 3 M0 V 4 2 MOV Q1 5 U MG5 N f o r Eu r o p i a n NCU A * R1 1 6 DASEND ( MF C9 0 5 0 A FAX- 8 2 5 0 P M0 V 5 12A MF C 9 5 5 0 A * C1 0 5 R1 9 6 D D A S0 V S0 V * R1 1 5 DAST 4 12A A * C1 0 4 R1 9 7 NCU2 P1 3 B6 B- PH S0 V S0 V A Main PCB 7/8 1 2 3 4 5 6