Sony TC-TX5 Manual de usuario

MICROFILM

TC-TX5

STEREO CASSETTE DECK

AEP Model

UK Model

E Model

Tourist Model

SERVICE MANUAL

Dolby noise reduction manufactured under

license from Dolby Laboratories Licensing

Corporation.

“DOLBY” and the double-D symbol aare

trademarks of Dolby Laboratories Licensing

Corporation.

Model Name Using Similar Mechanism TC-S1

Tape Transport Mechanism Type TCM-9700HLD

SPECIFICATIONS

Recording system 4-track 2-channel stereo

Frequency response (DOLBY NR OFF)

30 – 14,000 Hz (±3 dB), using

Sony TYPE I cassette

30 – 15,000 Hz (±3 dB), using

Sony TYPE II cassette

Wow and flutter ±0.15% W. Peak (IEC)

0.1% W. RMS (NAB)

±0.2% W. Peak (DIN)

Input TAPE IN (phono jacks):

impedance 47 kilohms

Output TAPE OUT (phono jacks):

voltage 550 mV

impedance 47 kilohms

General

Power requirements AEP, UK, Germany:

220 – 230V AC, 50/60 Hz

Other countries:

110 – 120V or 220 – 240 VAC,

50/60Hz Adjustable with the

voltage selector

Power consumption 10 W

Dimensions Approx. 280 ×85 ×360 mm

(111/8×33/8×141/4in) (w/h/d)

incl. projecting parts and controls

Mass Approx. 3.7 kg (8 lb 3 oz)

Supplied accessories: Audio connecting cord (2)

AU BUS connecting cord (1)

Design and specifications are subject to change without

notice.

– 3 –

SECTION 2

DISASSEMBLY

Note: Follow the disassembly procedure in the numerical order given.

CASE FRONT PANEL SECTION

LOADING PANEL MECHANISM DECK

Remove the loading panel

to direction of the arrow

Rotate the gear

to direction of

the arrow

two screws

(BVTT2.6

two screws

(BV3

bracket

mechanism deck

connector

(CN804)

four

screws

(BV3

two

claws

two

connectors

(CN351, 803)

two screws

(CASE 3 TP2)

case

two screws

(CASE 3 TP2)

screw

(BV3

flat wire

(CN802)

front panel section

screw

(BV3

three screws

(BV3

– 4 –

PRECAUTION

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

swab:record/playback/earth head pinch roller

rubber belts capstan

idlers

2. Demagnetize the record/playback head with a head demagne-

tizer. (Do not bring the head demagnetizer close to the erase

head.)

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 rated power sup-

ply voltage unless otherwise noted.

Torque Measurement

SECTION 3

MECHANICAL ADJUSTMENTS

Mode Torque Meter Meter Reading

CQ-102C

30-65 g•cm

FWD (0.42-0.90 oz•inch)

FWD 1.5-6 g•cm

Back tension (0.021-0.083 oz•inch)

CQ-102RC

30-65 g•cm

REV (0.42-0.90 oz•inch)

REV 1.5-6 g•cm

Back tension (0.021-0.083 oz•inch)

70-130 g•cm

FF, REW CQ-201B (0.98-1.80 oz•inch)

SECTION 4

ELECTRICAL ADJUSTMENTS

Note: The adjustment should be performed in the order given in

the service manual. As a rule, adjustments about playback

should be performed before those about recording.

The adjustments should be performed before for both L-CH

and R-CH.

• Switches and controls should be set as follows unless otherwise

specified.

DOLBY NR switch : OFF

DIRECTION switch : A

0 dB=0.775 V

TestTape

Type Signal Used for

P-4-A100 10 kHz, –10 dB Azimuth Adjustment

P-4-L300 315 Hz, 0 dB Playback Level Adjustment

WS-48B 3 kHz, 0 dB Tape Speed Check

Test Mode

This set will get into test mode by shorting the pins of CN801 (2P)

on MAIN board before turning the power on.

– 5 –

Record/Playback Head Azimuth Adjustment

Procedure:

1. Mode : REV playback

2. Turn the adjustment screw for the maximum output levels. If

these levels do not match, turn the adjustment screw until both

of output levels match together within 1 dB.

Screw

position

L-CH

peak

within

1dB

output

level

L-CH peak R-CH peak

within

1dB

angl

R-CH

peak

3. Phase Check

Mode : playback

–

Screen pattern

Good Wrong

in phase 45

135

180

LINE OUT

set

R-CH

L-CH 47 k

Ω

47 k

Ω

oscilloscope

test tape

P-4-A100

(10 kHz, –10 dB)

–

set

47 k

Ω

LINE OUT

level mete

Test tape

P-4-A100

(10 kHz, –10 dB)

4. Set in the FWD mode and repeat the step 1 to 3.

5. After the adjustment, lock the screw with locking compound.

Adjustment Location: Record/Playback head











FWD side REV side

Adjustment screw

Tape Speed Adjustment

Procedure:

Mode: FWD playback

–

set

LINE OUT

frequency counte

test tape

WS-48B

(3 kHz, 0 dB) 47 k

Ω

1. Set to FWD playback mode.

2. Adjust RV801 so that the frequency counter reading becomes

2,980 ± 30 Hz.

3. Confirm that the deviation between tape top and tape end is within

3%.

Playback Level Adjustment

Procedure:

Mode: FWD playback

Adjust RV151 (L-CH) and RV251 (R-CH) so that the reading on

level meter meets the adjustment limits below.

Adjustment Limits:

LINE OUT level: –4.7±0.5 dB (0.43 to 0.48 V)

Level difference between channels: within 2 dB

Check that the LINE OUT level does not change even if Playback

and Stop operation is repeated several times.

Adjustment Location: DECK board

Adjustment Location:

[DECK BOARD] (Component side)

–

set

LINE OUT

47 k

Ω

test tape

P-4-L300

(315 Hz, 0 dB) level mete

IC305

CN352

T351

RV252

Record BIAS(R-CH)

RV152

Record BIAS(L-CH)

RV251

Playback Level(R-CH)

RV151

Playback Level(L-CH)

– 6 –

set

AF OSC

Attenuator

600

Ω

10 k

Ω

blank tape

CS-123

LINE IN

1) 315 Hz

2) 10 kHz 67 mV (–21.3 dB)

Record BIAS Adjustment

Procedure:

1. Mode : record

2. Mode: playback

Record Level Adjustment

Procedure:

1. Mode : record

2. Mode: playback

–

set

LINE OUT

47 k

Ω

recorded portion level mete

3. Confirm playback the signal recorded in step 1 become adjust-

ment level as follows.

4. If these levels do not adjustment level, adjust the RV152 (L-

CH) and RV252 (R-CH) to repeat step 1 and 2.

Adjustment Level: Playback output of 10 kHz to playback out-

put of 315 Hz: ±0.5 dB.

Adjustment Location: DECK board

[MAIN BOARD] (Component side)

CN803

IC304 CN802

RV801

Tape Speed

CN801

TEST mode

RV253

Record Level(R-CH)

RV153

Record Level(L-CH)

3. Confirm playback the signal recorded in step 1 become adjust-

ment level as follows.

4. If these levels do not adjustment level, adjust RV153 (L-CH)

and RV253 (R-CH) to repeart step 1 and 2.

Adjustment Level: –21.3±0.5 dB (63 to 71 mV)

Adjustment Location: MAIN board

–

set

LINE OUT

47 k

Ω

recorded portion level mete

set

AF OSC

Attenuator

600

Ω

10 k

Ω

blank tape

CS-123

LINE IN

315 Hz, 67 mV (– 21.3 dB)

SECTION 5

DIAGRAMS

– 7 –

5-1. IC PIN FUNCTION DESCRIPTION

MAIN BOARD IC101 M38172M4-180FP (SYSTEM CONTROL)

Pin No. Pin Name I/O Function

1——

Not used (Fixed at “L”)

2——

3 KEY-X I Key input (A/D convert input) *1

4 KEY-Y I

5 FWD TAB I REC proof detection input from S902 (FWD side) “H”: Not nail

6 CHROM SW I Tape type detection input from S903 “L”: Type I

7 RVS TAB I REC proof detection input from S904 (REV side) “H”: Not nail

8 — — Not used (Fixed at “L”)

9 PLAY SW I Playback and stop detection input from S907 “L”: Playback

10 TEST MODE I Test mode terminal Normal: “H” Test mode: “L”

11 POWER OUT O Audio and mechanism power on/off output “L”: Off (Not used)

12 POWER IN I Primary power on/off input “H”: On

13 CLOSE O Loading motor (M901) drive output *2

14 OPEN O

15 — —

16 — —

17 — — Not used (Fixed at “L”)

18 — —

19 — —

20 — —

21 (CLOCK) O Not used (Open)

22 (DATA) O Not used (Fixed at “H”)

23 RELAY O Relay drive output “L”: ON

24 BIAS O Control output to recording bias switch (Q352) “L”: ON

25 AU BUS OUT O Audio bus output

26 AU BUS IN I Audio bus input

27 RESET I Reset input

28 X CIN I Not used (Fixed at “L”)

29 X COUT O Not used (Open)

30 X IN I Main system clock input (4 MHz)

31 XOUT O Main system clock output (4 MHz)

32 Vss — Ground

33 REC MUTE O Recording mute on/off control output “L”: Mute on

34 LINE MUTE O Line mute on/off control output “L”: Mute on

35 — — Not used (Fixed at “L”)

36 PB MUTE O Playback mute on/off control output “L”: Mute on

37 REC/PB O Mode control output to DOLBY NR amplifier (IC301) When recording: “H”

38 — — Not used (Open)

39 — —

40 — — Not used (Fixed at “L”)

41 POWER O Control output to ON/STANDBY LED (D857)

42 TAPE O Control output to TAPE LED (D856)

43 CD SYNC O Control output to CD SYNC LED (D855)

44 REC O Control output to REC LED (D854)

45 PAUSE O Control output to PAUSE (∏) LED (D853)

46 REV O Control output to REV (ª) LED (D852)

– 8 –

Pin No. Pin Name I/O Function

47 FWD O Control output to FWD (·) LED (D851)

48 — —

49 — —

50 — —

51 — —

52 — —

53 — —

54 — —

55 — —

56 — — Not used (Open)

57 — —

58 — —

59 — —

60 — —

61 — —

62 — —

63 — —

64 — —

65 TYPE I O Tape type output “H”: Normal position

66 TYPE II O Tape type output “H”: High position

67 (TYPE IV) O

68 — — Not used (Fixed at “L”)

69 — —

70 — —

71 SOLENOIDE O Plunger (PM901) drive output “H”: On

72 CAP.MOTOR O Capstan/reel motor (M902) drive output “H”: On

73 VCC — Power supply (+5V)

74 VEE — Ground

75 AVSS — Ground for A/D converter

76 VREF — Reference voltage (+5V) for A/D converter

77 HALF I Cassette half detection input from S905

78 AMS IN I AMS input

79 LIMIT SW I Loading detection input from S901 Open: “L”, Close: “M”, COM: “H”

80 PULSE I Rotary detection input from PH901

Voltage

Input port 0 V 0.45 V 1.19 V 2.19 V 3.2 V 3.98 V 4.48 V 5.0 V

Pin 4, KEY-X Open/Close STOP PAUSE FWD REV CD —Not key input

§π∏·ªSYNC

Pin 3, KEY-Y POWER REW FF REC DIRECTION ——

DIRECTION

ON/OFF 0) r A a

*1 Key Input

*2 Loading Motor

IN OUT

CLOSE !£ HL

OPEN !¢ LH

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