Sony MZ-R90/R91, MT-MZR70-165 service manual MZ-R70

Page 26

– 27 –

MZ-R70

6-2. BLOCK DIAGRAM — AUDIO SECTION —

				REC DRIVE
				IC603
	HR601	OVER WRITE	31	EFM	EFM 35
	OVER	OVER WRITE
	OVER	HEAD DRIVE
	WRITE	Q601, 602	33	LOGIC
	HEAD	Q601, 602
	HEAD

M603			CLK 34
OVER WRITE	5	MOTOR	F1	3
HEAD	7	DRIVE	R1	2
UP/DOWN	7	DRIVE	R1	2
MOTOR

		OE 24
19	DW TP	REC 23
18	DW BT	B+SW 22

SWITCHING

BATT +B REGULATOR REC +B

Q603

04

DIGITAL SIGNAL PROCESSOR

EFM/ACIRC ENCODER

ATRAC ENCODER

16M BIT DRAM

IC502 (2/2)

DIN1 33

123 EFMO

ADDT 41

113 FS4

SWDT 6

SCLK 7

SRDT 10

EEPROM

IC802

DI 3

SCLK 2

DO 4

XCS 1

OPT

CONTROL

Q302

J301

LINE IN

(OPTICAL)

MIC AMP

R-CH

A/D, D/A CONVERTER

IC302

9

IC301

STBY

LIN 2 41

J303

R-CH

STDO

A/D

LIN 1 44

14

12

MIC IN

4

(PLUG IN POWER)

CONV.

RIN 2 40

(Page 26)

R-CH

HEADPHONE AMP

RIN 1

43

A

TO PB

IC303

R-CH

SECTION

STDI

D/A

LOUT 2 29

22

2

J302

DADT

5

i 2

CONV.

ROUT 2 28

R-CH

XBCK

3

BCLK

24

LRCK

2

LRCK

15

BEEP

23

R-CH

FS256

1

MCLK

RESET

46

XRST

17

STB

R-CH

18

MUTE

15

CDTI

XCS 12

13

CCLK

PD 47

D

J304

14

CDTO

VC +B

RVCC

i 1

TO

KEY-R

KEY-R

C

POWER/LCD

DTCK

SWDT

POWER/LCD

SECTION

(Page 29)

SCLK

SECTION (Page 29)

SYSTEM CONTROLLER

IC801 (2/3)

12

SO0

XPD ADA 111

13

SCK0

XCS ADA 110

11

SI0

119

XCS NV

BEEP 18

XHP STBY 23

MUTE 117

• Signal path

30

HD CON1

31

HD CON2

XOPT CONT 116

: REC

XJACK DET 114

: PB

27

MODE 1

OPT DET 113

28

MODE 2

XMIC DET 115

29

MODE 3

RMC DTCK 19

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– 28 –

Image 26

Contents AEP Model US ModelCanadian Model UK ModelFlexible Circuit Board Repairing Notes on chip component replacementTABLE OF CONTENTS NOTES ON HANDLING THE OPTICAL PICK-UPBLOCK LCX-2R SECTION SERVICING NOTENOTES ON LASER DIODE EMISSION CHECK OPTICAL PICK-UPFLEXIBLE BOARDSECTION 2 GENERAL Page Page SECTION DISASSEMBLY 3-3.LCD MODULE 3-4.MAIN BOARDover write head section 3-6.SERVICE ASSY, OP3-5.MD MECHANISM DECK MT-MZR70-165 3-7.HOLDER ASSY 3-8.MOTOR FLEXIBLE BOARD3-9.MOTOR, DC M602 3-10.“MOTOR, DC M601”, “MOTOR, DC M603”4-2-1.Setting Method of Test Mode SECTION 4 TEST MODE4-2-2.Operation in Setting the Test Mode 888xxxxxxxxxFREC1SHUF000M a n u a l 011 0 6 3 B 011 C 6 8 S011 0 F FJ 011 0 5 9 A000S t a t 000A d r s 000B E m p 000# # # # # # 000P * * RE I B 000P * * R 000B O v r 000B f u l 000R t r y000N - 1 000N - 1 000N - 2 000N - 2 000N 0001 s t0001 s t 0001 s t 0001 s t 000R # # # #Description of Error Indication Codes • Description of Indication History4-7.KEY CHECK MODE 021R e s O K ? SECTION ELECTRICAL ADJUSTMENTS021R e s N 021R e s763V r h V c l 762V c l P W M765V c h P W M 766V r h V c hC D R U N 014S e t T m p000 A s s y 341 C D O KConnection 043R e s u m e043R e s C l r Check MethodConnecting Location SECTION DIAGRAMSMZ-R70 MZ-R70 Waveforms 6-3.BLOCK DIAGRAM - POWER SUPPLY SECTIONMZ-R70 Page Page Refer to page 41 for IC Block Diagrams MZ-R70MZ-R70 MZ-R70 IC302 IC501SN761056 NJM2173IC603 IC601MPC17A56FTA MPC18A21MTBAK4517-VQ-L IC901 MPC18A31FTAIC301 6-9.IC PIN DESCRIPTIONS MAIN BOARD IC502 CXD2660GA Page Page Page Page Page SECTION EXPLODED VIEWS Page SECTION ELECTRICAL PARTS LIST MAINMAIN MAIN MAIN MAIN Personal Audio Division Company Sony CorporationMZ-R70 Published by General Engineering DeptVer US Model Canadian Model AEP Model UK ModelE Model Australian Model Chinese Model Subject Taiwan model Addition