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– 34 –

•

1

TUNMUT

O

FM audio signal muting control output terminal    “H”: muting on

2

AMPON

O

Standby control signal output to the power amplifier  (IC801)    “L”: standby

3

ILLON

O

4

PW ON

O

Main system power supply on/off control signal output to the BA3918 (IC601)    “H”: power on

5

AMPMUTE

O

Muting control signal output to the power amplifier  (IC801)    “L”: muting on

6

RCIN1

I

Rotary remote commander shift key A/D input terminal

7

VDD

—

Power supply terminal (+5V)

8

X IN

I

Main system clock input terminal (8 MHz)

9

X OUT

O

Main system clock output terminal (8 MHz)

10

GND

—

Ground terminal

11

XT IN

I

Sub system clock input terminal (32.768 kHz)

12

XT OUT

O

Sub system clock output terminal (32.768 kHz)

13

EX2

I

Connected to ground

14

RESET

I

System reset signal input from the reset signal generator (IC571) and reset switch (S601)
“L” is input for several 100 msec after power on, then it changes to “H”

15

RDSCKI

I

Serial data transfer clock signal input from the RDS decoder (IC3)

16

BU IN

I

Battery detect signal input terminal    “H”: battery on

17

KEYACK

I

Input of acknowledge signal for the key entry    Acknowledge signal is input to accept function
and eject keys in the power off status    On at input of “L”

18

VOLSO

O

Serial data output to the electrical volume  (IC151)

19

VOLCKO

O

Serial data transfer clock signal output to the electrical volume  (IC151)

20

VOLCE

O

Chip enable signal output to the electrical volume  (IC151)

21

TAPEMUT

O

Tape muting on/off control signal output to the CXA2509AQ (IC351)    “H”: tape muting on

22

LMLOD

O

Loading/tape operation motor control signal output to the MM1322XFBE (IC360)
(For the loading direction and forward side operation)    *1

23

LMEJ

O

Loading/tape operation motor control signal output to the MM1322XFBE (IC360)
(For the eject direction and reverse side operation)    *1

24

AMSON

O

Tape auto music sensor control signal output to the CXA2509AQ (IC351)
“L” is output to lower the gain for audio level at FF/REW

25

N/R OUT

O

Forward/reverse direction control signal output to the CXA2509AQ (IC351)
“L: forward direction, “H”: reverse direction

26

AMSIN

I

Whether a music is present or not from CXA2509AQ (IC351) is detected at auto music sensor
“L”: music is present, “H”: music is not present

27

PLLSO

O

PLL serial data output to the FM/AM PLL (IC1)

28

PLLCKO

O

PLL serial data transfer clock signal output to the FM/AM PLL (IC1)

29

PLLCE

O

PLL serial chip enable output to the FM/AM PLL (IC1)

30

RDSSI

I

Serial data input from the RDS decoder (IC3)

31

AD ON

O

Power supply on/off control signal output for the A/D converter    “L”: power on

32

DOLON

I/O

Dolby control in/out terminal
At initial mode: valid/invalid selection input of dolby function (“L” input: valid)
At normal mode: dolby on/off control signal output (“H” output: dolby on)
Not used this function (fixed at “H”)

Power supply on/off control signal output terminal at the illumination and liquid crystal display
driver (IC901)    “H”: power on
At power select switch (S801) on mode: “H” output at the accessory on
At power select switch (S801) off mode: “H” output at the power on

– 35 –

33

MTLON

I/O

34

CMON

O

Capstan/reel motor (M901) drive signal output terminal    “H”: motor on

35

TAPEON

O

Tape system power supply on/off control signal output terminal    “H”: tape on

36

ACCON

I

Accessory detect signal input terminal    “L”: accessory on

37

PLLSI

I

PLL serial data input from the FM/AM PLL (IC1)

38

BEEP

O

Beep sound output terminal

39

LCDCKO

O

Serial data transfer clock signal output to the liquid crystal display driver (IC901)

40

LCDSO

O

Serial data output to the liquid crystal display driver (IC901)

41

LCDINH

O

Blank indicate control signal output to the liquid crystal display driver (IC901)
“L”: no display

42

LCDCE

O

Chip enable output to the liquid crystal display driver (IC901)

43

UNICKO

O

Serial data transfer clock signal output to the bus interface (IC701) (for SONY bus)

44

UNICKI

I

Serial data reading clock signal input terminal (for SONY bus)

45

UNISI

I

Serial data input from the bus interface (IC701) (for SONY bus)

46

UNISO

O

Serial data output to the bus interface (IC701) (for SONY bus)

47

VDD

—

Power supply terminal (+5V)

48

AVDD

—

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

49

AVREF+

I

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

50

KEYIN1

I

51

KEYIN0

I

52

D-BASS

I

D-BASS switch (SW951) input (A/D input)

53

KEYSEL

I

Setting terminal for the key (XR-C5080R: fixed at center voltage, XR-C5090R: fixed at “H”)

54

DSTSEL

I

Destination setting terminal
AEP, UK models: fixed at “L”, German model: fixed at “H”

55

RCIN0

I

Rotary remote commander shift key A/D input terminal

56

VSM1

I

Signal meter voltage detection input terminal    Not used (fixed at “L”)

57

VSM0

I

FM and AM (MW/LW) signal meter voltage detection input from the FM/AM tuner unit (TU1)

58

AVREF–

I

Reference ground terminal

59

AVSS

—

Ground terminal (for A/D converter)

60

GND

—

Ground terminal

61

BUSON

O

Bus on/off control signal output to the bus interface (IC701) (for SONY bus)    “L”: bus on

62

SYSRST

O

Reset signal output to the bus interface (IC701) (for SONY bus)    “L”: reset

63

SEKOUT

O

Seek control signal output to the FM/AM tuner unit (TU1)

64

TUNON

O

Tuner system power supply on/off control signal output to the BA3918 (IC601)    “H”: tuner on

65

FM ON

O

FM system power supply on/off control signal output to the BA3918 (IC601)    “H”: FM on

66

MUT

O

Line muting control signal output terminal    “H”: line muting on

67

AF SEK

O

AF seek control signal output terminal    Not used (open)

68

COLOR

I

Setting terminal for the illumination color    “L”: amber, “H”: green    Not used (open)

69

NOSESW

I

Detects the removal of the attaching and removing type front panel block    “L”: attaching

Key input terminal (A/D input)
OFF, SOURCE, MODE 

*, + ) +  SEEK AMS, – = 0 SEEK AMS, VOLUME –,

SEL, VOLUME +, DSPL, ATT , BTM SENS keys input (LSW901 to LSW910)

Key input terminal (A/D input)
6, INTRO 1, REPEAT 2, SHUF 3, BL SKIP 6, ATA 5, 4, FILE, AF/TA, PRESET DISC +/–,
DSPL keys input (LSW921 to LSW932)

METAL control in/out terminal
At initial mode: valid/invalid selection input of METAL function (“L” input: valid)
At normal mode: METAL on/off control signal output (“H” output: METAL on)
Not used this function (fixed at “H”)

– 36 –

*1  loading/tape operation motor control

                           MODE

 TERMINAL

LMLOD (pin @™)

“L”

“H”

“L”

“H”

LMEJ (pin @£)

“L”

“L”

“H”

“H”

STOP

LOADING/

FORWARD

EJECT/

REVERSE

BRAKE

70

ST IN

I/O

71

SD IN

I

Station detector detect input from the FM/AM tuner unit (TU1)
Stop level for SEEK, BTM, etc. is determined    SD is present at input of “H”

72

REL T

I

Reel table rotation detect signal input from the take-up and supply reel sensor

73

POS3

I

74

POS2

I

75

POS1

I

76

POS0

I

77

PW SEL

I

Power select switch (S801) input terminal
“L”: position A (halt mode), “H”: position B (operation mode)

78

TELEMUTE

I

Telephone muting signal input terminal
At input of “L”, the signal is attenuated by –20 dB    Not used (fixed at “H”)

79

TEST

I

Setting terminal for the test mode    “L”: test mode (normally fixed at “H”)

80

ILLIN

I

Not used (fixed at “L”)

Tape position detect input from tape operation switch on the mechanism block

Input of FM stereo detection signal from FM/AM tuner unit (TU1), and output of forced
monaural control signal to FM/AM tuner unit (TU1)  (Commonly used for stereo display input
and forced monaural output)
FM stereo detection at input of “L”, forced monaural at output of “L”

– 37 –

• 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

#2

#2

#3

#8

#4

#4

#2

#2

F201

MG-25G-136  

#1

Front panel ass’y

1

3-009-294-01 PANEL, SUB

2

3-935-003-01 SPRING, TORSION

3

3-932-205-21 DOOR, CASSETTE

4

X-3367-636-1 LOCK ASSY

* 5

3-009-306-01 SHEET, INSULATING

* 6

A-3313-472-A MAIN BOARD, COMPLETE

(XR-C5090R: AEP, UK)

* 6

A-3313-473-A MAIN BOARD, COMPLETE

(XR-C5090R: German)

* 6

A-3313-481-A MAIN BOARD, COMPLETE

(XR-C5080R: AEP, UK)

* 6

A-3313-482-A MAIN BOARD, COMPLETE

(XR-C5080R: German)

7

3-915-923-01 SCREW, GROUND POINT

* 8

X-3373-269-1 COVER ASSY (ISO)

9

3-012-859-01 CAP (25), RUBBER

* 10

3-018-798-01 BRACKET (IC)

* 11

3-018-613-01 HEAT SINK

12

3-935-014-01 CUSHION (U)

* 13

3-009-813-01 CHASSIS

14

3-937-650-01 PLATE (C), GROUND

* 15

A-3313-456-A POWER BOARD, COMPLETE

16

1-782-092-11 CORD (WITH CONNECTOR) (ISO-P) (POWER)

17

1-782-093-11 CORD (WITH CONNECTOR) (ISO-S) (SPEAKER)

18

1-777-989-21 CORD (WITH CONNECTOR) (AMP REM)

* 19

3-019-148-01 BRACKET (HS) (M)

F801

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