Sony TXDRE-210 Service manual

TXD-RE210

SERVICE

Dolby noise reduction manufactured under license from
Dolby Laboratories Licensing Corporation.
“DOLBY” and the double-D symbol a are trademarks of
Dolby Laboratories Licensing Corporation.

MANUAL

AEP Model

Model Name Using Similar Machanism NEW
CD CD Machanism Type CDM28-5BD23
Section Base Unit Name BU-5BD23

Optical Pick-up Type KSS-213B/S-N
Tape deck Model Name Using Similar Machanism TXD-R11
Section T ape Transport Mechanism Type TCM-190RB52C

SPECIFICATIONS

MICROFILM

COMPACT DISC CASSETTE DECK

TABLE OF CONTENTS

Specifications ........................................................................... 1

Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.

1. SERVICING NOTE.......................................................... 3

2. GENERAL

Location and Function of Controls .................................... 4

3. DISASSEMBLY

3-1. Front Panel Removal .................................................. 5

3-2. CD Mechanism Removal ........................................... 5

3-3. Mechanism Deck Removal......................................... 6

4. ADJUSTMENTS

4-1. Mechanical Adjustments ............................................ 7

4-2. Electrical Adjustments................................................ 7

5. EXPLANATION OF IC TERMINALS ..........................11

6. DIAGRAMS

6-1. Printed Wiring Boards – BD Section –..................... 14

6-2. Schematic Diagram – BD Section – ......................... 17

6-3. Schematic Diagram – Main Section – ...................... 22

6-4. Printed Wiring Boards – Main Section –.................. 27

7. EXPLODED VIEWS

7-1. Chassis Section ......................................................... 30

7-2. Panel Section ............................................................ 31

7-3. Mechanism Section -1 .............................................. 32

7-4. Mechanism Section -2 .............................................. 33

7-5. CD Mechanism Section -1........................................ 34

7-6. CD Mechanism Section -2........................................ 35

8. ELECTRICAL PARTS LIST ........................................ 36

This appliance is classified as a
CLASS 1 LASER product.
The CLASS 1 LASER
PRODUCT MARKING is lo­cated on the rear exterior.

This caution label
is located inside
the unit.

CAUTION

Use of controls or adjustments or performance of procedures other
than those specified herein may result in hazardous radiation ex­posure.

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE
WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE
PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN
SUPPLEMENTS PUBLISHED BY SONY.

– 2 –

SECTION 1

SERVICING NOTE

NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT

The laser diode in the optical pick-up block may suffer electrostatic
breakdown because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic breakdo wn and also use
the procedure in the printed matter which is included in the repair
parts.
The flexible board is easily damaged and should be handled with
care.

NOTES ON LASER DIODE EMISSION CHECK

The laser beam on this model is concentrated so as to be focused on
the disc reflective surface by the objective lens in the optical pick­up block. Therefore, when checking the laser diode emission, ob­serve more than 30 cm away from the objective lens.

CHUCK PLATE JIG ON REPAIRING

On repairing CD section, playing a disc without the CD lid, use
Chuck Plate Jig.

r

Code number of Chuck Plate Jig : X-4918-255-1

r

Disc table getting out procedure on the power supply is OFF.

Disc table

3

1

2

– 3 –

LOCATION AND FUNCTION OF CONTROLS

SECTION 2

GENERAL

This section is extracted from
instruction manual.

1

2

1 POWER switch
2 Disc tray
3 PLAY MODE button
4 OPEN/CLOSE button
5 REPEAT button
6 CD SYNCHRO button
7 FADER button
8 ARL button
9 Cassette deck
!º REC LEVEL control/AUTO indicator
!¡ DOLBY NR switch
!™ DIRection MODE switch
!£ Eject button
!¢ Tape operating buttons

r REC button
R REC MUTE button
0, ) buttons
ª, · buttons
p (stop) button
P (pause) button

3

4

5

6

7

8

!∞ CD operating buttons

) ± button
≠ 0 button

· button
p (stop) button
P (pause) button

!§ RESET button
!¶ DISPLAY button
!• TIME button
!ª EDIT/TIME FADE button
@º CREAR button
@¡ CHECK button
@™ PHONES jack
@£ PHONE LEVEL control

9

!º

!¡

!™!¶ !§@º !ª !•@¡ !¢!∞@™@£ !£

– 4 –

s

SECTION 3

DISASSEMBLY

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

3-1. FRONT PANEL REMOVAL

Disc table

3

1

2

Loading panel

4

5

Three Screws (+BV TP 3 x 6)

3-2. CD MECHANISM REMOVAL

Front panel assy

1

Four Screws (+BV TP 3 x 6)

8

9

Wire (Flat type) (9 core) to Main board (CN804)

CD Mechanism

2

SN802 (6P)

Chassis

5

Screw (+BV TP 3 x 6)

6

Wire (Flat type) (7 core) to Main board (CN806)

7

Wire (Flat type) (23 core) to Main board (CN805)

Wire (Flat type) (7 core) to Main board (CN801)

3

Chassi

– 5 –

)

3-3. MECHANISM DECK REMOVAL

Casstte lid assy

2

Front panel assy

1

Press § button

4

3

Two Screws (+BV TP 2.6 x 8)

Mechanism deck

3

Two Screws (+BV TP 2.6 x 8

– 6 –

SECTION 4

r

e

ADJUSTMENTS

4-1. MECHANICAL ADJUSTMENTS

PRECAUTION

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

record/playback head pinch roller
erase head rubber belts
capstan

2. Demagnetize the record/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 rated power sup­ply voltage unless otherwise noted.

r T orque Measurement

Mode Torque Meter Meter Reading

Forward CQ-102C

30 to 65 g•cm

(0.42 – 0.9 oz•inch)

Forward CQ-102C 1 to 7 g•cm
Back Tension (0.0134– 0.097 oz•inch)

Reverse CQ-102RC
Reverse CQ-102RC

Back T ension

FF, REW CQ-201B

30 to 65 g•cm

(0.41 – 0.9 oz•inch)

1 to 7 g•cm

(0.0134– 0.097 oz•inch)

70 to 120 g•cm

(0.972– 1.66 oz•inch)

4-2. ELECTRICAL ADJUSTMENTS

1. The adjustment should be performed in the publication.

(Be sure to make playback adjustment at first.)

2. The adjustment and measurement should be performed for
both L-CH and R-CH.

r

Switch position

DOLBY NR switch : OFF
DIR MODE switch :A

r

Standard record position :

Deliver the standard input signal level to input jack and set
the REC LEVEL control to obtain the standard output signal
level as follows.

Record Mode

AF OSC

attenuator

600

r Standard Input Level

Input Terminal T APE IN

source impedance 10kΩ

input signal level 0.5V (–3.8dB)

10 k

Ω

TAPE IN

Ω

set

47 k

TAPE OUT

level meter

Ω

+
–

r Test tape

Tape Contents Use

P-4-A100 10 kHz, –10dB Azimuth Adjustment
P-4-L300 315Hz, 0dB PB Level Adjustment

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

0dB=0.775V

TC Test Mode

setting : Push POWER button with STOP key and REC MUTE

key.

function :r when start recording, COUNTER is set to “0000”

and COUNTER MEMORY function is effective
(“MEMORY” appears on FLD).

r

While playing or AMS, the signal level is displayed.

(“L” / “H”)

r Test tape

Tape Contents Use

P-4-A100 10 kHz, –10dB Head Azimuth Adjustment
P-4-L300 315Hz, 0dB Level Adjustment

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

0dB=0.775V

Record/Playback Head Azimuth Adjustment

r Carrey out servicing or repairs form the REVERSE direction

first.

Procedure :

1. Mode : Forward playback

test tape
P-4A100
(10kHz, –10dB)

set

TAPE OUT

47 k

level mete

Ω

+
–

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 1dB.

L-CH
peak

within

Screw
position

R-CH
peak

output
level

1 dB

L-CH
peak

R-CH
peak

within
1 dB

screw angl

r

Standard Output Level

Output Terminal TAPE OUT

load impedance 47kΩ

output signal level 0.5V (–3.8dB)

– 7 –

r

r

3. Playback Mode

test tape
P-4A100
(10kHz, –10dB)

L-CH

set

R-CH

47 k

Ω

47 k

TAPE OUT

screen pattern

Ω

Osilloscope

V

H

Sample Value of Wow and flutter

W. RMS (JIS) within 0.3%
(test tape : WS-48B)

Playback Level Adjustment

Procedure :

Mode : Playback

test tape
P-4-L300
(315Hz, 0dB)

47 k

set

TAPE OUT

level mete

Ω

+
–

in phase 45° 90° 135° 180

good

wrong

°

4. Change the reverse playback mode and repeat the steps 1 to 3.

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

Adjustment Location :

– record/playback head –

forward side

adjustment screws

revers side

Tape Speed Adjustment

Procedure :

Mode : Playback

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

set

TAPE OUT

47 k

Ω

frequency counter

+

–

1. Set to forward playback mode.

2. Adjust RV71 so that frequency reading becomes 3,000± 90Hz.

Frequency difference between the beginning and the end of the tape
should be within ± 3%.

Adjustment Location : AUDIO board.

(see page 9)

Adjust R V11 (L-CH) and RV21 (R-CH) so the level meter reading
becomes the adjustment limits below.

Adjustment Level :

TAPE OUT level : – 7.7± 0.5dB (0.301 to 0.338V)
Level Difference between Channels : within 0.5dB

Confirm the TAPE OUT level does not change in playback mode
while changing the mode from playback to stop several times.

Adjustment Location : AUDIO board.

(see page 9)

Record Bias Adjustment

Procedure :

1. Mode : Record

AF OSC

1) 315Hz

2) 10kHz

attenuator

72.3mV (–20.6dB)

10 k

Ω

600

Ω

TAPE IN

blank tape

CS-123

set

2. Mode : Playback

recorded
portion

set

TAPE OUT

47 k

level mete

Ω

+
–

3. Confirm playback the signal recorded in step 1 become adjust­ment level as follows.

4. If these levels do not adjustment level, adjust the RV12
(L-CH) and RV22 (R-CH) to repeat step 1 and 4.

Adjustment level : Playback output of 315Hz to playback output

of 10kHz : ±0.5dB.

Adjustment Location : AUDIO board.

– 8 –

Record Level Adjustment

r

)

A

B

within 3

±

1Vp-p

symmetry

Procedure :

1. Mode : Record

AF OSC

315Hz 72.3mV (–20.6dB)

attenuator

10 k

CD SECTION

Note :

1. CD Block basically constructed to operate without adjustment.
Therefore, check each item in order given.

blank tape

CS-123

Ω

set

2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.

3. Use the oscilloscope with more than 10MΩ impedance.

4. Clean an object lens by an applicator with neutral detergent when
the signal level is low than specified value with the following
checks.

600

Ω

TAPE IN

2. Mode : Playback

recorded
portion

set

TAPE OUT

47 k

level mete

Ω

+
–

3. Confirm playback the signal recorded in step 1 become adjust­ment level as follows.

4. If these levels do not adjustment level, adjust the RV111
(L-CH) and RV211 (R-CH) to repeat step 1 and 4.

Adjustment Level :

TAPE OUT level : – 26± 0.5dB (36.7 to 41.1mV)

Adjustment Location : MAIN board.

[AUDIO BOARD] (Conductor side)

Record Bias
(R) (L)

RV22 RV12

RV71 (NORMAL) Tape speed

S-Curve Check

oscilloscope

BD board

TP (FE)
TP (VC)

+
–

Procedure :

1. Connect oscilloscope to test point TP(FE) and BD board.

2. Connect between test point TP (FEI) and TP (VC) by lead wire.

3. Turned Power switch on.

4. Put disc (YEDS-18) in and turned Power switch on again and
actuate the focus search. (Actuate the focus search when disc
table is moving in and out.)

5. Check the oscilloscope waveform (S-curve) is symmetrical be­tween A and B. And confirm peak to peak level within
3 ±1Vp-p.

6. After check, remove the lead wire connected in step 2.

Note : r T ry to measure se v eral times to make sure that the ratio of

A : B or B : A is more than 10 : 7.

r T ake sweep time as long as possible and light up the bright-

ness to obtain best waveform.

[MAIN BOARD]

(Component side)

RV21(R)
RV11(L)

RV211 : Record level (R-CH)

RV111 : Record level (L-CH

Playback Level

RF Level Check

oscilloscope

BD board

TP (RF)
TP (VC)

+
–

Procedure :

1. Connect oscilloscope to test point TP (RF) on BD board.

2. Turned Power switch on.

3. Put disc (YEDS-18) in and playback.

4. Confirm that oscilloscope waveform is clear and check RF sig­nal level is correct or not.

Note :

Clear RF signal waveform means that the shape “ ◊ ” can be
clearly distinguished at the center of the waveform.

RF signal waveform

VOLT/DIV : 200mV
TIME/DIV : 500nS

level : 1.2 Vp-p

+0.25
–0.20

– 9 –

E-F Balance (1 Track Jump) Check

oscilloscope

(DC range)

BD board

TP (TE)
TP (VC)

+
–

Procedure :

1. Connect oscilloscope to test point TP(TE) on BD board.

2. Turned Power switch on.

3. Put disc (YEDS-18) in to play the number five track.

4. Press the “P (Pause)” button. (Becomes the 1 track jump mode)

5. Check the level B of the oscilloscope’ s wa veform and the A (DC
voltage) of the center of the Traverse waveform.
Confirm the following :
A/B x 100 = less than ±22%

1 track jump waveform

Center of the waveform

RF PLL Free-run Frequency Check

Procedure :

1. Connect frequency counter to test point (PLCK) with lead wire.

frequency counter

BD board

TP (PLCK)

+
–

2. Turned Power switch on.

3. Put disc (YEDS-18) in to play the number five track.
Confirm that reading on frequency counter is 4.3218MHz.

Adjustment Location :

[BD BOARD] (Side B)

0V

level : 1.3

±

0.6 Vp-p

B

symmetry

A (DC voltage)

PLCK

11

TE FE

VC

20

15

1510

15 20

RF

TEI

151014

2825

– 10 –

SECTION 5

EXPLANATION OF IC TERMINALS

IC801 µPD78044FGF029-3B9 (SYSTEM CONTROL)

Pin No. Pin name I/O Description

1 LED O AUTO REC LEVEL LED ON/OFF.

2–7 1G – 6G O FL grid drive.

8 VDD – Power supply (+5V)

9 CLK O Command clock output for IC101 and IC104.
10 DATA O Command data output for IC101 and IC104.
11 SENS I SENS input for IC101 and IC104.
12 PGML O Command latch output for IC104.
13 AMUTE O Mute control output.
14 SQCLK O Q-data read-out for clock output.
15 NC O Not used (Open).
16 SUBQ I Q-data input.

17 RESET I System reset input.
18 METAL I Metal tape detect input.
19 TC TEST I TC test mode input. “L” : Test mode.
20 AVSS – A/D ground terminal.
21 LD IN O CD loading-in output.
22 LD OUT O CD loading-out output.
23 AD CTRL1 O A/D extended input (1) select signal output.
24 AD CTRL0 O A/D extended input (0) select signal output.
25 AD1 I A/D extended input (1).
26 AD0 I A/D extended input (0).
27 S. REEL I Supply reel pulse input.
28 CD TEST I CD test mode input.
29 AVDD – A/D analog power supply.
30 AVREF I A/D reference voltage input.
31 STOP SW I STOP switch input.
32 XT2 – Not used (Open).
33 VSS – Ground terminal.
34 X1 I System clock. (4MHz)
35 X2 O System clock. (4MHz)
36 NR1 O Dolby mode select output (1).
37 NR0 O Dolby mode select output (2).
38 BS/AMS O Blank skip/AMS select output.
39 RELAY O REC/PLAY select output.
40 XLT O Command lucth output.
41 REEL– O Reel motor control output.
42 REEL+ O Reel motor control output.
43 VOL OUT O Electrical volume control.
44 REC MUTE O REC mute ON/OFF control.
45 POWER OUT O Power switch control.
46 SCOR I Q-data sync input.
47 SIRCS IN I Remote control signal input.
48 VSS (IC) – Ground terminal.
49 AMS IN I AMS signal input.
50 POWER IN I Power OFF detect input.

–––––––––––––––

–––––––––––––––––––

–––––––––––

–––––––––––––––

––––––––––––––––––––––––

– 11 –

Pin No. Pin name I/O Description

51 LD ON O Laser diode ON output.
52 VDD – Power supply (+5V).
53 HP SEL O Headphone output selection.
54 INPUT SEL O Recording source select.

55 TC LINE MUTE O TC line mute control output.

––––––––––––––––––––––––––––––––

56–70 S1–S15 O FL segment output.

71 VDISP – Power supply for FL.

72–77 S16–S21 O FL segment output.

78 BIAS O Bias ON/OFF output.
79 PB/REC O PB/REC select output for Dolby (IC501).
80 CAP.M O Capstan motor ON/OFF control.

– 12 –

r

d

CIRCUIT BOARDS LOCATION

SECTION 6

DIAGRAMS

BD board

POWER SW board

HP board

LOADING board

PANEL board

AUDIO board

TRANSFORMER board

LEAF SW boar

MAIN board

VOL board

– 13 –

– 14 –