NAD C 542 service manual Block Diagram, Keyboard, Cd Mechanism Unit

+8V +5V

U501,U507

DIGITAL

POWER

D514-D517

RECTIFIER

DIODES

KEYBOARD

F1

F2

M501

VFL DISPLAY

RANDOM

K502

M110

M109

M105

M107

M108

-22V

RELAY

-12V

TIME

REPEAT

M314

D510-D511

TRIGGER

+12V

5V

M106

M104

M103

M101

M102

ZENER DIODES

SWITCH

U502-3,U506

ANALOGUE

Q312

POWER

D506-D508

RECTIFIER

POWER

DIODES

1

79 80

24

41

56

TRANSFORMER

D501-D504

35

40

RECTIFIER

18 67

U301 M38B59EF

DIODES

M500

19 69

SYSTEM CONTROL CPU

32

& VFL DISPLAY DRIVER

59 70

65

63

23

K501

AC POWER I / P

60 80

RELAY

Q310

22

62

66

58

64

67

68

72

25

M319

RCA JACK

NAD LINK	NAD LINK
IN	OUT

M313

IR_IN

9 10 11

U403

74HC00 NAND GATE

812 13

9U402 15 NAD LINK

11MICRO-

CONTROLLER

8

BLOCK DIAGRAM

- 7 -

	CD MECHANISM UNIT
			LOADING
			MOTOR
				DISCO
		LOADING MOTOR
		LIMIT SWITCH		DISW
			SPINDLE
			MOTOR
			SLED
DISC			MOTOR
			PU-IN
			LIMIT SWITCH
			PICK		Q101
			UP

Q103

	25	12	15	RFAC	51	20	1
27
			16	FE	59
	U101						9	64
1				SETE
			18		40	41
	CX2581
							61	63
2	RF AMP		28	RFDC	43
6	11					U201		66
						LXD3017Q
26	27		4	SRDR	29	DSP
1	2		5	SFDR	28
			9	FRDR	33
	U202
			10	FFDR	32
	BA6392
			20	TRDR	31
			19	TFDR	30
12	13
				SPDR
16 17		15	24		26
					27			60

	Q307	M113
		REMOTE
		SENSOR
	M315		CD AUDIO
TRIGGER IN
			O/P

Q401- Q403				L	M313
			Q301-Q304	R
MUTE CIRCUIT					RCA
			MUTE
					JACK
27			U306	U305
			L
1	3	U302	16
		PCM1732	R
4		DAC	13
				M316
				OPT JACK
				DIGITAL
				OUTPUT

	3	6	M303
			EMC FILTER
	U403			M318
	74HC00			RCA JACK
NAND GATE				DIGITAL
			L301	OUTPUT
2	4		DIGITAL COIL