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– 13 –

2

 guide (C)

1

 three claws

– 14 –

1. Clean the following parts with a denatured-alcohol-moistened

swab:

playback head

pinch roller

rubber belt

capstan

idler

2. Demagnetize the playback head with a head demagnetizer.
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the

parts adjusted.

5. The adjustments should be performed with the power supply

voltage unless otherwise noted.

•

Mode

Tension Meter

Meter Reading

Forward

CQ-403A

more than 90 g

(more than 3.18 oz)

Reverse

CQ-403R

more than 90 g

(more than 3.18 oz)

•

Mode

Torque Meter

Meter Reading

Forward

CQ-102C

30 - 65 g•cm

(0.42 - 0.90 oz•inch)

Forward

CQ-102C

0.5 - 4.5g•cm

Back Tension

(0.01 - 0.06 oz•inch)

Reverse

CQ-102RC

30 - 65 g•cm

(0.42 - 0.90 oz•inch)

Reverse

CQ-102RC

0.5 - 4.5g•cm

Back Tension

(0.01 - 0.06 oz•inch)

FF, REW

CQ-201B

60 - 200 g•cm

(0.83 - 2.78 oz•inch)

Procedure:
1. Put the set into the FWD PB mode.
2. Adjust adjustment resistor for inside capstan motor so that the

reading on the speed checker or frequency counter becomes in
specification.

Specification: Constant speed

Speed checker

Frequency counter

–1.5 to +2.5%

2,955 to 3,075 Hz

set

+

–

test tape
WS-48A
(3 kHz, 0 dB)

speaker out terminal

4 

Ω

speed checker

or

frequency counter

Tape Speed Adjustment

– SET UPPER VIEW –

0 dB=0.775 V

Tuner section is no adjustment.

– 15 –

•

µ

1

AMSSEL

I

Setting terminal for the AMS selection   fixed at “L”

2

POS3

I

3

POS2

I

4

POS0

I

5

POS1

I

6

TAPEON

O

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

7

CM ON

O

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

8

LM LOD

O

Loading/tape operation motor control signal output to the LB1638M (IC351)
(For the loading direction and forward side operation)    *1

9

LM EJ

O

Loading/tape operation motor control signal output to the LB1638M (IC351)
(For the eject direction and reverse side operation)    *1

10

TUNON

O

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

11

FM ON

O

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

12

PW ON

O

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

13

MUT

O

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

14

VOLCE

O

Chip enable signal output to the electrical volume  (IC331)

15

VOLCKO

O

Serial data transfer clock signal output to the electrical volume  (IC331)

16

VOLSO

O

Serial data output to the electrical volume  (IC331)

17

AMPON

O

Standby control signal output to the power amplifier  (IC751)    “L”: standby

18

AMPMUT

O

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

19

DX/LO

O

Local/DX selection signal output to the FM/AM tuner unit (TU1)    “L”: DX, “H”: local

20

AM MONO

O

AM forced monaural signal output terminal    Not used (open)

21

GND

—

Ground terminal

22

DSTSEL

I

Destination setting terminal (frequency select switch (S502) input terminal)
“L”: AM 9k step or FM 50k step, “H”: AM 10k step or FM 200k step

23

DBASIN

I

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

24

KEYIN1

I

Key input terminal (A/D input)
6, INTRO 1, REPEAT 2, SHUF 3, BL SKIP 6, ATA 5, 4, PRESET DISC  +/– keys input
(LSW921 to LSW927, LSW929 and LSW930)

25

KEYIN0

I

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

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

SEL, VOLUME +, ATT , DSPL, BTM, LCL keys input (LSW901 to LSW912)

26

RC IN0

I

Rotary remote commander shift key A/D input terminal

27

VSM

I

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

28

AMIFIN

I

AM intermediate frequency detection signal input from the FM/AM tuner unit (TU1)

29

FMIFIN

I

FM intermediate frequency detection signal input from the FM/AM tuner unit (TU1)

30

VDD2

—

Power supply terminal (+5V)

31

FM OSC

I

FM local oscillator detection signal input from the FM/AM tuner unit (TU1)

32

AM OSC

I

AM local oscillator detection signal input from the FM/AM tuner unit (TU1)

33

GND

—

Ground terminal

34

NCO

O

Not used (open)

35

EO1

O

Main charge-pump control signal output terminal

36

TEST0

I

Setting terminal for the test (fixed at “L”)

37

NCO

O

Not used (open)

38

SEKOUT

O

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

39

MW/SW

O

MW/SW selection signal output to the FM/AM tuner unit (TU1)    “L”: MW, “H”: SW

40

BEEP

O

Beep sound output terminal

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

– 16 –

41

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 “H”

42

BU IN

I

Battery detect signal input terminal    “H”: battery on

43

MTLSEL

I/O

44

DOLON

I/O

45

AMSIN

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

46

ST

I/O

47

AMS ON

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

48

N/R OUT

O

Forward/reverse direction control signal output to the CXA2509AQ (IC301)
“L: forward direction, “H”: reverse direction

49

TAPMUT

O

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

50

ILLON

O

51

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”

52

NOSESW

I

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

53

TELMUT

I

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

54

REL T

I

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

55

ACCIN

I

Accessory detect signal input terminal    “L”: accessory on

56

TESTIN

I

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

57

RC IN1

I

Rotary remote commander shift key A/D input terminal

58

PW SEL

I

Power select switch (S501) input terminal
“L”: position A (halt mode), “H”: position B (operation mode)

59

MTLIN

I

Input terminal to set whether the auto metal function is present or not
“L”: auto metal function is present (fixed at “H”)

60

ADON

O

Power supply on/off control signal output for the A/D conversion

61

KEYSEL

I

Setting terminal for the key (fixed at “H”)

62

SEKOUTSEL

I

Active selection terminal for the SEKOUT (pin #•) (fixed at “H”)

63

COLORSEL

I

Setting terminal for the illumination color    “L”: amber, “H”: green (fixed at “H”)

64

LCDCE

O

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

65

LCDCKO

O

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

66

LCDSO

O

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

67

LCDINH

O

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

68

UNICKI

I

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

69

UNISO

O

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

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”

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 in this set (fixed at “H”)

METAL control in/out terminal
At initial mode: auto/manual mode selection input of METAL function    “L”: manual mode
At manual mode: METAL on/off control signal output terminal (“H” output: METAL on)
At auto mode: input at MTLIN (pin %ª)
Not used this function in this set (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 (S501) on mode: “H” output at the accessory on
At power select switch (S501) off mode: “H” output at the power on