Sony TXDRE-210 Service manual

TXD-RE210

SERVICE MANUAL

AEP Model

	Dolby noise reduction manufactured under license from		Model Name Using Similar Machanism	NEW
	Dolby Laboratories Licensing Corporation.
		CD	CD Machanism Type	CDM28-5BD23
	“DOLBY” and the double-D symbol aare trademarks of
	Dolby Laboratories Licensing Corporation.	Section	Base Unit Name	BU-5BD23
			Optical Pick-up Type	KSS-213B/S-N
		Tape deck	Model Name Using Similar Machanism	TXD-R11
		Section	Tape Transport Mechanism Type	TCM-190RB52C

SPECIFICATIONS

COMPACT DISC CASSETTE DECK

MICROFILM

	TABLE OF CONTENTS
Specifications ...........................................................................		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

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

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 breakdown 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 –

SECTION 2 GENERAL

This section is extracted from instruction manual.

LOCATION AND FUNCTION OF CONTROLS

1		2 3 4 56 7 8												9		!º !¡

@£

@¡ @º !ª !• !¶!§

!

@™

!¢

!£

!™

1

POWER switch

! CD operating buttons

2

Disc tray

) ± button

3

PLAY MODE button

0 button

4

OPEN/CLOSE button

· button

5

REPEAT button

p

(stop) button

6

CD SYNCHRO button

P

(pause) button

7

FADER button

!§ RESET button

8

ARL button

!¶ DISPLAY button

9

Cassette deck

!• TIME button

!º REC LEVEL control/AUTO indicator

!ª

EDIT/TIME FADE button

!¡

DOLBY NR switch

@º

CREAR button

!™

DIRection MODE switch

@¡

CHECK button

!£

Eject button

@™

PHONES jack

!¢

Tape operating buttons

@£

PHONE LEVEL control

r

REC button

R

REC MUTE button

0, ) buttons

ª, · buttons

p

(stop) button

P

(pause) button

– 4 –

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

Chassis

4	5 Screw (+BV TP 3 x 6)

6Wire (Flat type) (7 core) to Main board (CN806)

7Wire (Flat type) (23 core) to Main board (CN805)

8Wire (Flat type) (7 core) to Main board (CN801)

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

5 Three Screws (+BV TP 3 x 6)	Front panel assy

3-2. CD MECHANISM REMOVAL

1 Four Screws (+BV TP 3 x 6)

CD Mechanism

2 SN802 (6P)

3

Chassis

– 5 –

3-3. MECHANISM DECK REMOVAL

3 Two Screws (+BV TP 2.6 x 8)

Casstte lid assy	Front panel assy

Mechanism deck

4

2

1 Press §button

3 Two Screws (+BV TP 2.6 x 8)

– 6 –

SECTION 4

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.

rTorque 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	30 to	65 g•cm
			(0.41 – 0.9 oz•inch)
	Reverse	CQ-102RC	1 to	7 g•cm
	Back Tension		(0.0134–	0.097 oz•inch)
	FF, REW	CQ-201B	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

TAPE IN	level meter

10 kΩ	47 kΩ
attenuator
	+
	set
	–
600 Ω
	TAPE OUT

r Standard Input Level

Input Terminal	TAPE IN
source impedance	10kΩ
input signal level	0.5V (–3.8dB)
r Standard Output Level
Output Terminal	TAPE OUT
load impedance	47kΩ
output signal level	0.5V (–3.8dB)

rTest 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”)

rTest 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	level meter
	(10kHz, –10dB)
		47 kΩ
		+
		set
		–

TAPE OUT

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
	output	within	within
		1 dB
	level		1 dB
	R-CH
Screw	peak
position
			screw angle
		L-CH	R-CH
		peak	peak

– 7 –

3. Playback Mode

test tape P-4A100

(10kHz, –10dB)

Osilloscope

L-CH

47 kΩ

V H

set

R-CH	47 kΩ
	TAPE OUT
screen pattern
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

revers side

adjustment screws

Tape Speed Adjustment

Procedure :

Mode : Playback

test tape
WS-48B
(3kHz, 0dB)	frequency counter
	47 kΩ
set	+
	–

TAPE OUT

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)

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	level meter
	(315Hz, 0dB)
		47 kΩ
		+
		set
		–

TAPE OUT

Adjust RV11 (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	72.3mV (–20.6dB)	blank tape
	2) 10kHz
			CS-123
	attenuator	10 kΩ
		set

600Ω

TAPE IN

2. Mode : Playback

	recorded	level meter
	portion
		47 kΩ
		+
		set
		–

TAPE OUT

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 –

Note :

Record Level Adjustment

Procedure :

1. Mode : Record

AF OSC

315Hz 72.3mV (–20.6dB)	blank tape
	CS-123

10 kΩ

attenuator

set

600Ω

TAPE IN

2.Mode : Playback

	recorded	level meter
	portion
		47 kΩ
		+
		set
		–

TAPE OUT

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

RV21(R)

Playback Level

RV11(L)

[MAIN BOARD]

(Component side)

RV211 : Record level (R-CH)

RV111 : Record level (L-CH)

CD SECTION

Note :

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

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.

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.

symmetry

A

within 3 ±1Vp-p

B

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

r Try to measure several times to make sure that the ratio of A : B or B : A is more than 10 : 7.

rTake sweep time as long as possible and light up the brightness to obtain best waveform.

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 “ à ” can be clearly distinguished at the center of the waveform.

RF signal waveform		VOLT/DIV : 200mV
		TIME/DIV : 500nS

level : 1.2 +0.25–0.20Vp-p

– 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 waveform 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

B

A (DC voltage)

0V

level : 1.3 ±0.6 Vp-p

symmetry

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)

	10		5	1
11		15		20
TE			FE
VC				RF
PLCK			TEI
	14	10		5	1
15	20			25 28

– 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	–––––––––––––––		I		System reset input.
	RESET
18	METAL		I		Metal tape detect input.
19	–––––––––––––––––––		I		TC test mode input. “L” : Test mode.
	TC TEST
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	–––––––––––		O		Blank skip/AMS select output.
	BS/AMS
39	–––––––––––––––		O		REC/PLAY select output.
	RELAY
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	––––––––––––––––––––––––		O		REC mute ON/OFF control.
	REC MUTE
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 –

SECTION 6

DIAGRAMS

r CIRCUIT BOARDS LOCATION

BD board TRANSFORMER board

POWER SW board

LEAF SW board

HP board

LOADING board

PANEL board

MAIN board

AUDIO board

VOL board

– 13 –

– 14 –