SERVICE MANUAL

XR-C5120

US Model

Canadian Model

Model Name Using Similar Mechanism

Tape Transport Mechanism Type

SPECIFICATIONS

XR-C5100

MG-25F-136

MICROFILM

FM/AM CASSETTE CAR STEREO

XR-C5120

6-3.

SCHEMATIC DIAGRAM – MAIN Board (1/2) – •

See page 16 for Waveforms.

•

See page 27 for IC Block Diagrams.

– 19 – – 20 –

6-4.

SCHEMATIC DIAGRAM – MAIN Board (2/2) – •

See page 28 for IC Block Diagrams.

– 21 – – 22 –

(Page 25)

XR-C5120

6-6.

SCHEMATIC DIAGRAM – KEY Board – • See page 16 for Waveform.

(Page 22)

– 25 – – 26 –

XR-C5120

• IC Block Diagrams

– MAIN Board –

IC21 TB2118F-EL-S

24 23 22 21 20

VCC

– +

19

+

+ –

18 17

AMP

16 15 14 13

REGULATOR

SEEK/RECP

OSCILLATOR

REFERENCE

DIVIDER

SEEK/RECP

PRESCALLER

PHASE

COMPARATOR

SIG

12BIT

PROGRAMMABLE

COUNTER

+

20BIT

IF COUNTER

40BIT SHIFT

REGISTER

18BIT

18BIT

22BIT

ON/OFF

4BIT SWALLOW

COUNTER

VDD

AMP

BUFFER

SERIAL

INTERFACE

I/O

PORT

OUTPUT

PORT

1 2 3 4 5 6 7 8 9 10 11 12

IC301 CXA2509AQ-T4

PBFB2

PBRIN2

31

32

PBREF2 33

PBFIN2 34

VCT

PBGND

35

36

PBFIN1 37

PBREF1 38

PBRIN1

PBFB1

39

40

30

VCT

29 28 27 26

120 µ /70 µ

T2

– +

F2

F1

X1

+

X1

25

LPF

NR BIAS

TAPE/AUX

TAPE EQ

FWD/RVS

VCC

+

–

F3

24 23 22 21

24dB

+ –

MS

MODE

20

19

18

17

16

MSMODE

DRSW

TAPESW

INSW

NC

MS ON/

OFF

DETECT

15 NC

14 MSOUT

13 DGND

– +

T1

+ –

12 MSTC

11 G1FB

1

120 µ /70 µ

2 3 4 5 6 7 8

24dB

9 10

– 27 –

IC331 TDA7462D

6

7

4

5

1

2

3

8

9

10

11

12

13

SE1L

SE1R

MD+

MD–

CDL+

CDL–

CDR–

CDR+

PDR

PDGND

PDL

SE2L

SE2R

CREF 14

IC351 LB1930M-TLM

PAUSE

DETECT

INPUT

GAIN &

AUTO

ZERO

LOUDNESS

CONTROL

CIRCUIT

VOLUME

CONTROL

CIRCUIT

SOFT

MUTE

TREBLE/

BASS

CONTROL

CIRCUIT

COMPANDER

INPUT

GAIN

BEEP

LOUDNESS

CONTROL

CIRCUIT

DIGITAL CONTROL CIRCUIT

VOICE BANDPASS

HP LP

FRONT

FADER

FRONT

FADER

REAR

FADER

REAR

FADER

SUBWOOFER

LP

FADER

SUBWOOFER

OUT

IIC

BUS

SDA

SCL

POWER

SUPPLY

28

27

26

25

24

23

SE3L

SE3R

MUTE

SDA

SCL

PAUSE

22 OUT FL

21

20

19

OUT FR

OUT RL

OUT RR

18

17

SUBOUT+

SUBOUT–

16 VDD

15 GND

VCC

NC

1

2

IN1 3

BUFFER

IN2 4

S-GND 5

BUFFER

CONTROL

CIRCUIT

MOTOR

DRIVE

CIRCUIT

10 NC

9

8

7

OUT1

NC

OUT2

6 P-GND

IC611 BA3918-V2

REGULATOR

1 2 3 4

–

+

OVER VOLTAGE

PROTECT

5 6 7 8 9

–

+

10

+

– –

+

11 12

BUS ON

1

RST 2

BATT 3

CLK

VREF

DATA

4

5

6

GND 7

IC581 BA8270F-E2

BUS ON

SWITCH

RESET

SWITCH

BATTERY

SWITCH

14 VCC

13

12

11

10

RST

BUS ON

CLK IN

BU IN

9 DATA IN

8 DATA OUT

– 28 –

6-7.

IC PIN FUNCTION DESCRIPTION

•

MAIN BOARD IC501 MN101C12GTA1 (SYSTEM CONTROLLER)

Pin No.

1

2

3

4

19

20

21

15

16

17

18

22

23

24

25

10

11

12

13

14

7

8

9

5

6

26

27

28

29

30

31

32

33

34

35

Pin Name

AVREF–

VSM

KEYIN1

KEYIN0

D-BASS IN

DSTSEL

FUNC-SEL

NCO

RC-IN0

AVREF+

VDD

OSC OUT

OSC IN

GND

XT IN

XT OUT

GND

RC-IN1

SYSRST

BUS-ON

UNISO

UNISI

UNICKO

UNICKI

NCO

KEYACK

NOSESW

BU-IN

SIRCS

TEL-ATT

TEST-IN

RAMBU

RESET

VOL-MUT

BEEP

I/O

I

I

Function

Reference voltage (0V) input terminal (for A/D converter)

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

(A/D input)

I

I

Key input terminal (A/D input) (LSW921 to LSW923, LSW927 to LSW933)

6, PRESET DISC –/+, DSPL, 6, 5, 4 n, 3 PLAY MODE, 2 SET UP, 1 N keys input

Key input terminal (A/D input) (LSW901 to LSW903, S901, LSW905, LSW906)

OFF, SOURCE, MODE *, SEEK/AMS = 0 – + ) +, SOUND, SHIFT keys input

I

I

D-BASS switch (S981) input terminal (A/D input)

Destination setting terminal (fixed at center voltage in this set)

I Setting terminal for the function select (fixed at “H” in this set)

O Not used (open)

I Rotary remote commander key input terminal (A/D input)

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

— Power supply terminal (+5V)

O Main system clock output terminal (18.432 MHz)

I Main system clock input terminal (18.432 MHz)

— Ground terminal

I Sub system clock input terminal (32.768 kHz)

O Sub system clock output terminal (32.768 kHz)

— Ground terminal

I Rotary remote commander shift key input terminal “L”: shift

O Reset signal output to the SONY bus interface (IC581) “L”: reset

O Bus on/off control signal output to the SONY bus interface (IC581) “L”: bus on

O Serial data output to the SONY bus interface (IC581)

I Serial data input from the SONY bus interface (IC581)

O Serial data transfer clock signal output to the SONY bus interface (IC581)

I Serial data reading clock signal input for the SONY bus interface Not used (open)

O Not used (open)

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 “H”

I

I

I

I

I

I

Front panel block remove/attach detection signal input terminal

“L”: front panel is attached

Battery detect signal input from the SONY bus interface (IC581) and battery detect circuit

“L” is input at low voltage

Sircs remote control signal input terminal Not used (fixed at “L”)

Telephone muting signal input terminal At input of “H”, the signal is attenuated by –20 dB

Not used (fixed at “L”)

Setting terminal for the test mode “L”: test mode, Normally: fixed at “H”

Internal RAM reset detection signal input terminal

Input terminal to check that RAM data are not destroyed due to low voltage

This checking is made within 100 msec after reset Fixed at “L” in this set

I

System reset signal input from the reset signal generator (IC551) and reset switch (S551)

“L”: reset “L” is input for several 100 msec after power on, then it changes to “H”

O

Muting control signal output to the electrical volume (IC331)

Volume minimum: “

∞

” output (“H” active)

O Beep sound drive signal output terminal

– 29 –

52

53

54

55

56

57 to 75

76

77

78

79

80

81

Pin No.

36

37

45

46

47

42

43

44

48

49

50

38

39

40

41

51

Pin Name

AMP-MUT

AMP ON

PLL-CKO

PLL-CE

PLL-SO

PLL-SI

LCD-SO

LCD-CE

LCD-CKO

VOL-SIO

NCO

VOL-CKO

ACC-IN

MUT

NCO

AMSON

82

83

N/R-OUT

MTLON

TAPE-MUT

DOLON

AMSIN

NCO

ST-MONO

SD-IN

RE-IN0

RE-IN1

AD-ON

POWSEL

ILL-ON

REEL

I/O Function

O Muting on/off control signal output to the power amplifier (IC751) “L”: muting on

O

Standby on/off control signal output to the power amplifier (IC751)

“L”: standby mode, “H”: amp on

O PLL serial data transfer clock signal output to the FM/AM PLL (IC21)

O PLL chip enable signal output to the FM/AM PLL (IC21) “H” active

O PLL serial data output to the FM/AM PLL (IC21)

I PLL serial data input from the FM/AM PLL (IC21)

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

O Chip enable signal output to the liquid crystal display driver (IC901) “H” active

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

I/O Two-way data bus with the electrical volume (IC331)

O Not used (open)

O Bus clock signal output to the electrical volume (IC331)

I Accessory detect signal input terminal “L”: accessory on

O Audio line muting on/off control signal output terminal “H”: muting on

O Not used (open)

O

Tape auto music sensor control signal output to the CXA2509AQ (IC301)

“L” is output to lower the gain for audio level at FF/REW mode

O

I/O

O

Forward/reverse direction control signal output to the CXA2509AQ (IC301)

“L”: forward direction, “H”: reverse direction

METAL control in/out terminal

At initial mode: valid/invalid selection input of METAL function (valid at “L” input)

At normal mode: METAL on/off control signal output terminal (METAL on at “H” output)

Not used this function (fixed at “H”)

Tape muting on/off control signal output to the CXA2509AQ (IC301) “H”: muting on

Active at ATA, FF/REW mode

I/O

Dolby control in/out terminal

At initial mode: valid/invalid selection input of dolby function (valid at “L” input)

At normal mode: dolby on/off control signal output terminal (dolby on at “H” output)

Not used this function (fixed at “H”)

I

Whether a music is present or not from CXA2509AQ (IC301) is detected at auto music sensor

“L”: music is present, “H”: music is not present

O Not used (open)

I/O

FM stereo broadcasting detection signal input from the FM/AM tuner unit (TU1), or forced monaural control signal output to the FM/AM tuner unit (TU1)

“L” is input in the FM stereo mode, or “L” is output in the forced monaural mode

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”

I

I

Dial pulse input of the rotary encoder (RE900)

(for VOLUME/BASS/TREBLE/BALANCE/FADER control)

O

I

O

A/D converter power control signal output terminal

When the KEYACK (pin @§) that controls reference voltage power for key A/D conversion input is active, “L” is output from this terminal to enable the input

Power select switch (S501) input terminal “L”: off (halt mode), “H”: on (operation mode)

Power on/off control signal output of the illumination LED and liquid crystal display driver

(IC901) “H”: power on Depends on initial setting of power select switch (S501)

Power select switch (S501) on: “H” output at the accessory on

Power select switch (S501) off: “H” output at the power on

I

Rotation detect signal input from supply reel sensor and take-up reel sensor on the deck mechanism

– 30 –

Pin No.

84

85

86

87

88

89

90

91

92

93

94

95 to 100

Pin Name

POS3

POS2

POS0

POS1

LM-LOD

LM-EJ

TAPEON

CM-ON

POWON

FM-ON

TU-ON

NCO

I/O

I

I

I

I

Tape position (EJECT/FF/REW/

REV/FWD mode) detect input from the tape operation switch on the deck mechanism

Function

POS3: “L”: REV and EJECT mode, “H”: others mode

POS2: “L”: REW mode, “H”: others mode

POS0: “L”: EJECT mode, “H”: others mode

POS1: “L”: FF and FWD mode, “H”: others mode

O

Motor drive signal output to the loading/tape operation motor drive (IC351) “H” active

(For the loading direction and forward side operation) *1

O

O

Motor drive signal output to the loading/tape operation motor drive (IC351) “H” active

(For the eject direction and reverse side operation) *1

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

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

O Main system power supply on/off control signal output to the BA3918 (IC611) “H”: power on

FM system power supply on/off control signal output to the BA3918 (IC611)

“L”: AM power on, “H”: FM power on

O

Tuner system power supply on/off control signal output to the BA3918 (IC611)

“H”: tuner power on

O Not used (open)

*1 Loading/tape operation motor control

Mode

STOP

Terminal

LM-LOD (pin *•)

LM-EJ (pin *ª)

“L”

“L”

LOADING/

FORWARD

“H”

“L”

EJECT/

REVERSE

“L”

“H”

BRAKE

“H”

“H”

– 31 –