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

Page 42

Pin No.

 

Pin Name

I/O

 

Pin Description

87

 

SET KEY 2

I

Set key input terminal (A/D input) (B, jog, END SEARCH keys input)

 

 

 

 

 

 

 

88

 

REC KEY

I

REC key input terminal

 

 

 

 

 

 

 

89

 

VRM MON

I

VREM voltage monitor input terminal (A/D input)

 

 

 

 

 

 

90

 

HIDC MON

I

HI-DC voltage monitor input terminal (A/D input)

 

 

 

 

 

 

91

 

AVSS

Ground terminal (for A/D converter)

 

 

 

 

 

 

92

 

AVREF

I

Input terminal for power supply voltage adjustment reference voltage (+2.4 V)

 

(for A/D converter)

 

 

 

 

 

 

 

 

 

 

 

 

 

93

 

AVDD

Power supply terminal (+2.4 V) (for A/D converter)

 

 

 

 

 

 

94

 

TEST0

I

Input terminal for the test (normally: fixed at “L”)

 

 

 

 

 

 

95

 

TEST1

I

Input terminal for the test (normally: fixed at “L”)

 

 

 

 

 

 

 

96

 

TDI

I

Input terminal for JTAG

Not used (open)

 

 

 

 

 

 

 

97

 

TMS

I

Input terminal for JTAG

Not used (open)

 

 

 

 

 

 

 

98

 

TCX

I

Input terminal for JTAG

Not used (open)

 

 

 

 

 

 

 

99

 

XTRST

I

Input terminal for JTAG

Not used (open)

 

 

 

 

 

 

 

100

 

TDO

I

Input terminal for JTAG

Not used (open)

 

 

 

 

 

 

101

 

TSB CLKCTL

O

TSB clock control signal output terminal

 

 

 

 

 

 

102

 

SSB DATA

I/O

Two-way SSB serial data bus with the SN761056ADBT (IC501)

 

 

 

 

 

 

103

 

SBSB CLK

I

SSB serial clock signal output to the SN761056ADBT (IC501)

 

 

 

 

 

 

 

104

 

FLASH WR EN

Not used (fixed at “H”)

 

 

 

 

 

 

 

105

 

VDD

Power supply terminal (+2.4 V)

 

 

 

 

 

 

 

106

 

VSS

Ground terminal

 

 

 

 

 

 

 

107 to 109

 

VLC1 to VLC3

Power supply terminal for the liquid crystal display (+2.4 V)

 

 

 

 

 

 

110

 

XCS ADA

O

Chip select signal output to the A/D, D/A converter (IC301)

 

 

 

 

 

 

111

 

XPD ADA

O

Power supply control signal output to the A/D, D/A converter (IC301)

 

 

 

 

 

 

112

 

 

 

O

Reset signal output terminal “L”: reset Not used (open)

 

XRST MTR DRV

 

 

 

 

 

 

113

 

OPT DET

I

DIN plug detect signal input terminal

 

 

 

 

 

 

114

 

XJACK DET

I

LINE IN plug detect signal input terminal

 

 

 

 

 

 

115

 

XMIC DET

I

MIC plug detect signal input terminal

 

 

 

 

 

 

116

 

XOPT CONT

O

Power supply control signal output to the DIN plug laser diode

 

 

 

 

 

 

117

 

MUTE

O

Analog muting on/off control signal output terminal “L”: muting off, “H”: muting on

 

 

 

 

 

 

118

 

XHP STBY TMP

O

Power supply control signal output to the headphone amplifier Not used (open)

 

 

 

 

 

 

119

 

XCS NV

O

Chip select signal output to the EEPROM (IC802)

 

 

 

 

 

 

 

120

 

XINT REC SW

O

Not used (open)

 

 

 

 

 

 

 

 

– 50 –

Image 42
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 BOARD3-6.SERVICE ASSY, OP 3-5.MD MECHANISM DECK MT-MZR70-165over write head section 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 DIAGRAMS MZ-R70SECTION MZ-R70 6-3.BLOCK DIAGRAM - POWER SUPPLY SECTION MZ-R70Waveforms Page Page Refer to page 41 for IC Block Diagrams MZ-R70MZ-R70 MZ-R70 IC302 IC501SN761056 NJM2173IC603 IC601MPC17A56FTA MPC18A21MTBIC901 MPC18A31FTA IC301AK4517-VQ-L 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