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65

Pin No.

Pin Name

I/O

Description

63

SP-SCK

I

Spectrum analyzer display serial data transfer clock signal input from the master controller 
(IC500)

64

LCDCLK

O

Display serial data transfer clock signal output to the liquid crystal display driver (IC900, 920)

65

VSS

—

Ground terminal

66

LCDINH

O

Blank indicate control signal output to the liquid crystal display driver (IC900, 920)
“L”: no display

67, 68

VSS

—

Ground terminal

69

LCDCE0

O

Chip enable signal output to the liquid crystal display driver (IC900)    “H” active

70

LCDCE1

O

Chip enable signal output to the liquid crystal display driver (IC920)    “L” active

71

P63

O

Not used (open)

72 to 78

P27 to P21

O

Not used (open)

79

FL W

O

Flash memory data write control signal output terminal    “H”: active

80

FWE (L)

I

Flash memory data write enable signal input terminal

81

RESET

I

System reset signal input from the reset signal generator (IC506) and reset switch (S703)
“L” is input for several 100 msec after power on, then it changes to “H”

82

NMI (H)

I

Non maskable interrupt input terminal
Connect the backup detect circuit (BU-IN pin $ª) in this set

83

STBY (H)

I

Hard ware standby input terminal      Not used (fixed at  “H”)

84

VCC

—

Power supply terminal (+5V)

85

XTAL

O

System clock output terminal (18.432 MHz)

86

EXTAL

I

System clock input terminal (18.432 MHz)

87

VSS

—

Ground terminal

88

PF7

O

Not used (open)

89

VCC

—

Power supply terminal (+5V)

90 to 96

PF6 to PF0

O

Not used (open)

97

UNI-SO

O

Serial data output to the SONY bus interface (IC271)

98

UNI-SO

I

Serial data input from the SONY bus interface (IC271)

99, 100

VSS

—

Ground terminal

101

UNI-SCK

I/O

Serial clock signal input /output with the MD mechanism controller (IC501) and master controller 
(IC500) or serial clock signal output to the SONY bus interface (IC271)

102

P53/ADTRG

O

Not used (open)

103

AVCC

—

Power supply terminal (+5V) (for A/D converter)

104

VREF

I

Reference voltage (+5V) input terminal (for A/D converter)

105 to 110

P40/AN0 to

P45/AN5

I

Not used (fixed at “L”)

111

P46/AN6/DA0

I

Not used (fixed at “L”)

112

P47/AN7/DA1

I

Not used (fixed at “L”)

113

AVSS

—

Ground terminal (for A/D converter)

114

VSS

—

Ground terminal

115 to 122

P17 to P10

O

Not used (open)

123

MD0 (H)

I

Setting terminal for the CPU operational mode (fixed at “H” in this set)

124

MD1 (H)

I

Setting terminal for the CPU operational mode (fixed at “H” in this set)

125

MD2 (H)

I

Setting terminal for the CPU operational mode (fixed at “H” in this set)

126 to 128

PG0 to PG2

O

Not used (open)

66

#2

#2

#1

#1

#4

#4

#4

#4

Front panel section

MG-164NF-138

TU101

A

B

C

A

B

C

D

F1

D

The components identified by
mark 

! or dotted line with mark

! are critical for safety.

Replace only with part number
specified.

• Items marked “*” are not stocked since they

are seldom required for routine service. Some
delay should be anticipated when ordering
these items.

• The mechanical parts with no reference num-

ber in the exploded views are not supplied.

• Hardware (# mark) list and accessories and

packing materials are given in the last of the
electrical parts list.

NOTE:

• -XX and -X mean standardized parts, so they

may have some difference from the original
one.

• Color Indication of Appearance Parts

Example:
KNOB, BALANCE (WHITE) . . . (RED)

↑

↑

Parts Color Cabinet's Color

Ref. No.

Part No.

Description

Remark

Ref. No.

Part No.

Description

Remark

1

X-3377-562-1 PANEL ASSY, SUB

2

3-025-484-01 SPRING (DOOR)

3

3-025-483-03 DOOR (MD)

4

3-022-338-01 BUTTON (EJECT) (

6)

* 5

A-3294-736-A RELAY BOARD, COMPLETE

6

X-3376-687-1 LOCK ASSY

7

X-3375-066-1 BRACKET (GEAR) ASSY

8

3-030-909-02 DAMPER, OIL

9

1-674-594-11 FLEXIBLE BOARD

* 10

A-3317-859-A MAIN BOARD, COMPLETE (TYPE A)

* 10

A-3317-860-A MAIN BOARD, COMPLETE (TYPE B)

* 10

A-3317-861-A MAIN BOARD, COMPLETE (TYPE C)

11

3-376-464-11 SCREW (+PTT 2.6X6), GROUND POINT

12

3-360-123-01 PLATE (C), GROUND

* 13

3-022-317-01 BRACKET (AMP)

* 14

3-023-841-11 HEAT SINK

* 15

3-022-316-51 COVER

16

3-011-999-01 CUSHION (MD)

17

3-932-860-01 SCREW (2.6X4) (C TIGHT), +PTT

* 18

A-3294-728-A POWER BOARD, COMPLETE (TYPE C)

* 18

A-3294-729-A POWER BOARD, COMPLETE (TYPE A)

* 18

A-3294-735-A POWER BOARD, COMPLETE (TYPE B)

* 19

3-036-995-01 BRACKET (POWER)

20

1-776-527-71 CORD (WITH CONNECTOR) (ISO) (POWER)

21

1-790-355-21 CORD (WITH CONNECTOR) (RCA)

22

3-339-410-01 COVER (2), PIN JACK

23

1-777-246-21 CORD (WITH CONNECTOR) (ANT)

* 24

X-3377-555-2 CHASSIS ASSY

* 25

3-036-998-01 SHEET, INSULATING

26

3-713-786-51 SCREW +P 2X3

27

1-791-458-11 CABLE, POWER (WITH CHOKE COIL)

28

1-475-982-11 UNIT (MICROPHONE)

29

X-3375-861-2 HOLDER (MIC) ASSY

* 30

3-040-197-01 PLATE, SHIELD

F1

1-532-877-11 FUSE (BLADE TYPE) (AUTO FUSE) (10A)

TU101

A-3282-045-A TUNER UNIT (TUX-012 (E))

•

Abbreviation
TYPE A : ENGLISH, SPANISH
TYPE B : ENGLISH, GERMAN
TYPE C : ENGLISH, FRENCH

67

not supplied
(DISPLAY board)

#11

LCD900

Ref. No.

Part No.

Description

Remark

Ref. No.

Part No.

Description

Remark

51

X-3377-559-1 PANEL SUB ASSY, FRONT

52

3-022-332-01 BUTTON (10 KEY)

(SHIFT. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10)

53

3-022-329-21 BUTTON (SOURCE)

54

3-033-667-02 KNOB (VOL)

55

3-022-323-31 LEVER (SHUTTLE)

(+ 

+ ). 0 = -. SEEK/AMS)

56

3-022-324-02 PLATE (SHUTTLE), LIGHT GUIDE

57

3-022-330-11 BUTTON (MODE) (MODE. OFF)

* 58

3-030-648-01 PLATE (RING), LIGHT GUIDE

59

3-022-331-01 BUTTON (SOUND)

60

3-935-151-01 SPRING (OPEN)

61

3-022-333-01 BUTTON (OPEN)

62

3-022-308-01 BUTTON (PTY) (PTY. AF/TA. TIR)

* 63

3-037-152-01 BRACKET (LCD)

64

1-694-414-11 CONDUCTOR BOARD, CONNECTION

(RUBBER CONNECTOR)

* 65

3-037-000-01 SHEET, DIFFUSION

* 66

3-037-669-01 PLATE (LCD), LIGHT GUIDE

67

3-010-999-01 BEARING (L)

68

3-010-998-01 SPRING (BEARING)

69

3-010-999-01 BEARING (R)

70

X-3377-563-1 PANEL ASSY, FRONT BACK

71

3-322-226-41 SPACER (A)

72

3-040-797-01 SPACER (S)

73

3-040-798-01 SPACER (S2)

LCD900 1-803-633-11 DISPLAY PANEL, LIQUID CRYSTAL

68

Ref. No.

Part No.

Description

Remark

Ref. No.

Part No.

Description

Remark

#5

#6

#6

#8

#6

#6

* 101

A-3317-836-A SERVO BOARD, COMPLETE

* 102

X-3376-799-1 CHASSIS ASSY, MD

103

3-032-714-01 SPRING (FLOAT F), TENSION

104

3-921-111-01 SPRING (FLOAT B), TENSION

105

3-919-273-01 DAMPER, OIL

* 106

X-3376-796-2 HOLDER ASSY

107

3-032-682-01 SPRING (HOLDER)

* 108

3-034-301-01 CUSHION (EJ2)

* 109

3-034-302-01 CUSHION (EJ3)

* 110

3-032-712-01 LEVER (LOCK R)

111

3-919-281-01 SPRING (CHUCKING)

* 112

X-3376-800-1 COVER ASSY, MD

113

3-035-932-01 WASHER, STOPPER

* 114

X-3376-797-3 LEVER (LE) ASSY

115

3-032-707-01 SPRING (LEVER LE)

116

3-925-034-01 ROLLER (GEAR E)

* 117

X-3376-798-1 ARM ASSY, CHUCKING

* 118

3-032-711-01 LEVER (LOCK L)