HP LaserJet Pro CLJ M375NW PRO 300 CE903A#BGJ, M475 CE863A manual 155

7 6 5 4 3 2 1

tools 129

(ASIC-6p) ASICCLK

1 2

<< Function Check >>

									+3.3VA
							R60
			(ASIC-8p)		PLLENBL		3.3K,0.063W
							1		2
				(A505)	PFULLS
				(A505)	POUTS					1
NF101			R10	(A505)	FSRPRSS					2
			430,0.1W							3
1	FB 2		21
C69		2	C74	(A503)	TNRRSPWM					4
100P,50V/NOTMNT				(A504)	RDSLED					5
		1	100P,50V/NOTMNT		ITBLLED					6
				(A504)		R49
					RDSGAIN0				100,0.063W	7
				(A504)			1		2
		C8			RDSGAIN1		R48		100,0.063W	8
				(A504)			1		2
										9
	0.1U,25V						R65
			(A504)		RBLSGAIN0			1	2	10
+24VA			(A504)		RBLSGAIN1		R50		100,0.063W	11
								1	2
	R54			(A503)	RDOORS			100,0.063W		12
					ITBTS					13
	24K,0.1W			(A504)
					MPTPS					14
				(A504)			R46
					OPTPKSL					15
				(A505)			1		2
					OPTPS			100,0.063W		16
	24ALIVE			(A505)						17
R35			1		DEVHPS					18
			C106 (A504)
3.3K,0.1W			2	(A504)	MPTPREGS					19
			0.01U,50V		CSTPS					20
	+3.3VA			(A504)						21
		R12								22
					OPTPREGS					23
		47K,0.063W		(A504)
					DUPFANON				2 R21 100,0.063W	24
CP1			R1	(A505)				1
1	FCT		2	1						25
Check Pad			1K,0.063W
J2					IOTR

11p)

12p)

13p)

14p)

15p)

16p)

17p)

18p)

19p)

20p)

(A503)

(ASIC-

(ASIC-

(ASIC-

(ASIC-

(ASIC-

(ASIC-

(ASIC-

(ASIC-

(ASIC-

(ASIC-

WAKEVC

ADB9

ADB8

ADB7

ADB6

ADB5

ADB4

ADB3

ADB2

ADB1

ADB0

																				C11
																				0.1U,25V
		CP8	CP3	CP4	CP5	CP6	CP7														1 2		1	CP12
100		1	1	1	1	1	1																N.C.
	99	98	97	96	95	94	93	92	91	90	89	88	87	86	85	84	83	82	81	80	79	78	77	76

CPU

IC1

+3.3VA

	R4									+3.3VA
	150,0.1W/NOTMNT
	1	2
R3			C3					R26		R25	1K,0.063W
			2	22P,50V
3.3K,0.1W			1	2
1	2
	X501
			1	2			1	2
			1				1K,0.063W
				C4	C7	12			C10 1 2	1U,25V/NOTMNT	C9
							0.1U,25V
			22P,50V
										0.

75RESET

74							WAKEENG		(A503)
73							CCRT
	R69								(A503)
72		100,0.063W					VCTRLOFF
		2	1						(A505)
71						FSRD	(A505)		R271
70										2	33,0.063W
69									R281	2	33,0.063W
68									R291	2	33,0.063W
67		R195 2		3.3K,01 .063W			ASICRST		(ASIC-26p)
66
65			R7 1	100,02		.063W	FEEDMA		(A504)
64		R199 1		100,02		.063W	FEEDMB		(A504)
63							RSCPR		(A504)
62							RDSCPR		(A504)
61							RSLED		(A504)
60			R8 1	100,02	.063W		FEEDMI0A
									(A504)
59			R34	100,0.063W			FEEDMI1A
				1		2			(A504)
58			R9	100,0.063W			FEEDMI0B
				1	2				(A504)
57			R221	2 100,0.063W			FEEDMI1B
									(A504)
56							FDOORS		(A504)
55	R56					ZEROX		(A505)
54			100,0.063W			REGIMI0A
		2	1					(A504)
53	R63		100,0.063W			REGIMI1A		(A504)
	R62	2	1
52			100,0.063W			REGIMI0B		(A504)
	R1982		1
51			100,0.063W			REGIMI1B		(A504)
	2		1

0.1U,25V 1 2

	C13				F
		1	2
		0.1U,25V
		IC7
1		CD	VDD	5
	2	VSS
3		MR	VOUT	4

RESET IC

NJU7704F29A-@-#ZZZB

E

WR (ASIC-21p)

RD (ASIC-22p)

ALE (ASIC-23p)

PWRSWON

(A505)

D

Troubleshooting

CPU/ASIC diagrams Figure 2-10 CPU diagram

		1	IOTT
Check Pin
	LC-2-G-WHT/NOTMNT

26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

<< IOT >>

				+3.3VA
		+3.3VA
J110	2	3	+3.3VA		10K,0.063W			IOTR
				R30		1	2
J110	1	DA2
		DAN217U/NOTMNT
		1	2
						R32
					1K,0.063W
J110	3
			+3.3VA
		DA1
		DAN217U/NOTMNT
		1	2
J110	4	3				R31		IOTT
					1	2
					1K,0.063W
<< M-CPU Writer >>
J111	1		R17					MODE0
			1	2
			1K,0.063W
J111	2		R16					MODE2
			1	2
			1K,0.063W
J111	3		R18					P80
			1	2
			1K,0.063W
J111	4			R19				P81
			1	2
			1K,0.063W
J111	5				R14			TCK
				1	2
				1K,0.063W

	TCK	2
(A504)	PREGS	J 1

JNT3

					+3.3VA
EEPROM
	IC4		+3.3VA
				R530	R531
1		VCC 8		2.7K,0.1W
	A0		2		2.7K,0.1W
2	A1	WP 7		C522
3	A2	SCL 6	1	0.1U,25V
4	GND	SDA 5
CHG	R1EX24004ASAS0A

+3.3VA

<< TEST PRINT SW >>

	R304	10K,0.063W	R305	J
				JNT1
	SW1		P81		1
B1	A1		21 TESTPRT		2
D1	C1		10K,0.063W

KSHS636AT

(A505)	(A504) 100,0.063W	0,1A	R215
100,0.063W			0,1A
R59	R64
RLD REGIMB	REGIMA
	(A504)
	R13

1 2

C12

0.1U,25V

SUB2TH	MAINTH	SUBTH
(A506)	(A505)	(A505)

+3.3VA

TNR4	TNR3	TNR2	TNR1	ASICOFF
(A503)	(A503)	(A503)	(A503)	(A505)

R6

1 2

47K,0.063W

R11

1 2

47K,0.063W

<< CPU >>

C

1: CPU

JNT2

2: ASIC

3: VIF, LSR, SCN, HVT,TG

1

J

REGS

(A504)

ITBLS

2

P80

4: DRIVER PCA, SENSOR

(A504)

5: FSR, LVT, DUP , OPT, ENV

MODE0

DEVSL

6: FSR

MODE2

+24A: always alive

+24B: Shutdowned by interlock SW

B

Stand-by

Sleep

OFF

+3.3VA

ON

ON

ON

+3.3VB

ON

OFF

OFF

1: CPU

A

CD1-3

ENWW