Brother International MFC 8890DW Service Manual - Page 432
NCU PCB circuit diagram, Fig. 8-4
UPC - 012502622673
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■ NCU PCB circuit diagram 1 2 3 4 5 6 +24V D7 A 1SS120 A CML 6B @R1 120 2W + R41-4910-A XX 3 XX 4 L3 D4 RA-351M-V6-2 L2 SW1 11 12 2 7 1 A5X-24E-908 R7 100 2W JW1 R4 6.2k @T1 NC BT-17 C2 C102 @C3 C10 + 35V C4 C103 @R8 510 R10 2.7k C5 50V + C2.2 SL 6B (LINE) FG 7 FG 8 J2 NC D6 RA-242M-C6 D5 RA-242M-C6 J1 B FG 8 NC FG 7 NC (EXT) XX 4 XX 3 R41-4910-A FG L1 @D2 S1ZB60 A2 - + @D1 A1 ERA15-04 AK2 PLS 6C C A E @PH1 K PS2533-1 GND C1 C474 250V R6 6.2k R5 6.2k GND R2 24k R3 24k D3 1SS120 PH3 TLP421 A CI C 6B E K GND C7 R11 C104 4.3k C101 C104 @C9 C221 R14 100k +5V R12 100k C102 8 C104 R27 4.7k R16 100k C19 C222 2 - U1 BA10358 1 3+ 4 GND RL1 C8 C104 6B R23 3.3k SF SF B US CAN P1 TELRL 11 TELRL FB FB 2C GND TELSL 10 TELSL US CAN 3D +24V 9 +24V R28 100k @C18 C221 REF CML 2A CI 4B GND 8 CML 7 CI 6 GND C11 C101 + AK1 C TELOFF 6B PH2 TLP320 GND E +5V These components are mounted for SF Models only. REF +5V TELOFF 2C +5V SL 5A RL1 5B PLS 2B 5 TELOFF 4 +5V 3 SL 2 RL1 1 PLS B11B-PH-K-S L8 C @Q1 C @C6 B TELRL 6B C10 E C5395 + +5V @R9 150 @R20 100 R18 620 C FG GND REF R25 C16 620 6.3V C470 JW4 JW3 GND GND 285D-D440J-111 XX 1 @L5 @R24 @C13 10V C104 C104 @C10 C471 GND GND (H.S) XX 2 XX 3 XX 4 GND 5 GND NC 6 @L4 GND @L7 @L6 2.7k C470 GND @C17 C104 @R22 24k @C12 C101 @C15 @R21 C104 24k @R15 150k U1 BA10358 67 5+ @R13 JW2 TELSL 6B @J3 @R19 3.3k 2.7k @R17 @C14 D C103 150k C471 GND D GND C104 REF 1 2 3 4 5 6 Fig. 8-4 8-4 Confidential