SONY MZR909 - Service Manual Immediate Download

SERVICE MANUAL

d impedance 10

Audio playing system

MiniDisc digital audio system

Laser diode properties

Material: GaAlAs

Wavelength: = 790 nm

Emission dura tion : continuous

Laser output: less than 44. 6

µW

(This output is the va lue measured at a distance

of 200 mm from the lens surface on the optical

pick-up block with 7 mm a per ture .)

Recording and playback time

When using MDW-80:

Ma ximum 160 min. in monaura l

Ma ximum 320 min. in ste reo

Revolutions

350 rpm to 2, 800 rpm (CLV)

Error correction

ACIRC (Advanced Cross Interleave Reed

Solomon Code)

Sampling frequency

44.1 kHz

Sampling rate converter

Input: 32 kHz/44. 1 kHz/48 kHz

Coding

ATRAC (Adaptive TRa nsform Acoust ic

Coding)

ATRAC3 -- LP2

ATRAC3 -- LP4

Modulation system

EFM (Eight to Fourteen Modula tion)

Number of channels

2 s ter eo channels

1 mona ura l channel

Frequency response

20 to 20, 000 Hz

± 3 dB

Inputs

Micropho ne : stereo mini-jack, minimum input

leve l 0. 25 mV

Line in1): s tereo mini-ja ck, minimum input

leve l 49 mV

Op tical (Digital) in

: optical (digital) mini-ja ck

Outputs

i/LINE OUT2): s tereo mini-jack

headphones/earphones: maximum output

leve l 5 mW + 5 mW, loa d impedance 16 oh m

LINE OUT: 19 4 mV, loa

kilohm

Power requirements

Sony AC P owe r Ada ptor connecte d a t the DC

IN 3V jack:

23 0 - 240 V AC, 50 Hz (UK and Hong kong models)

22 0 V AC, 50 Hz (Chinese model)

23 0 V AC, 50 /60 Hz (Europe continental model)

10 0 - 240 V AC, 50 /60 Hz (Other models)

Nicke l meta l hydr ide rechageable battery NH-

14WM(A) 1.2V 1350 mAh (MIN) Ni-MH

LR6 (s ize AA) alkaline battery

Dimensions 3)

Approx. 78 .9

× 72. 0 × 17. 1 mm (w/h/d)

(31/8

× 27/8 × 11/16 in.)

Mass

Approx. 11 0 g (3.9 oz ) the recorder only

1)The LINE IN (OP T) jack is used to connect

e ither a digital (optica l) cable or a line

(a nalog) cable.

2)The i/LINE OUT jack connector eithe r

headphones/earphones or a line ca ble .

3)Measured in accordance with JEITA.

Battery operating time

Battery life 1)

When recording 2)

(Unit: approx hours)(JE ITA

3))

1) The battery life may be shorter due to operating

conditions and the tempreture of the location.

2) Whe n you record, use a fully charged

rechargeable ba tter y. Reco rding time may

diffe r according to the a lka line batteries.

Batteries

Stere o

LP2

Stere o

LP4

Stereo

NH-14WM

nickel metal

hydride

rechargeable

battery 4)

8.5

LR6 (S G)

S ony alkaline

dry battery 5)

7.5

NH-14WM

nicke l meta l

hydride

rechargeable

battery 4)

+ One LR6

(SG) 5)

Below measurable limit

Wow and Flutter

PORTABLE MINIDISC RECORDER

AEP Model

UK Model

E Model

Chinese Model

Australian Model

Tourist Model

SPECIFICATIONS

MZ-R909

US and foreign patents licensed from Dolby

Laboratories.

Continued on next page

Model Name Using Similar Mechanism

NEW

Mechanism Type

MT-MZR909-171

Optical Pick-up Name

LCX-4R

Ver 1.2 2002. 01

9-873-285-03

Sony Corporation

2002A0500-1

Personal Audio Company

2002.01

Published by Sony Engineering Corporation

MZ-R909

TABLE OF CONTENTS

SERVICING NOTES ............................................... 3

GENERAL ................................................................... 4

DISASSEMBLY

3-1. Disassembly Flow ...........................................................

3-2. Panel Assy, Bottom .........................................................

3-3. Panel Assy, Upper Section ..............................................

3-4. "LCD Module", "Panel Assy, Upper" ............................

3-5. MAIN Board Assy ..........................................................

3-6. "Case Assy, Battery", "MAIN Board" ...........................

3-7. Strip, Ornamental ............................................................

3-8. "MD Mechanism Deck (MT-MZR909-171)",

"Chassis Assy, Set" .........................................................

3-9. Service Assy, OP (LCX-4R) ...........................................

3-10. Holder Assy ..................................................................... 10

3-11. Motor, DC (Sled) (M602) ............................................... 10

3-12. "Motor, DC (Spindle) (M601)",

"Motor, DC (Over Write Head UP/DOWN) (M603)" ... 11

TEST MODE .............................................................. 12

ELECTRICAL ADJUSTMENTS ......................... 18

DIAGRAMS

6-1. Block Diagram SERVO Section ............................... 34

6-2. Block Diagram AUDIO Section ............................... 35

6-3. Block Diagram KEY CONTROL/DISPLAY/

POWER SUPPLY Section ........................................... 36

6-4. Note for Printed Wiring Boards and

Schematic Diagrams ....................................................... 37

6-5. Printed Wiring Board

Main Board (Component Side) ............................... 38

6-6. Printed Wiring Board

Main Board (Conductor Side) ................................. 39

6-7. Schematic Diagram Main Board (1/4) .................... 40

6-8. Schematic Diagram Main Board (2/4) .................... 41

6-9. Schematic Diagram Main Board (3/4) .................... 42

6-10. Schematic Diagram Main Board (4/4) .................... 43

6-11. IC Pin Function Description ........................................... 48

EXPLODED VIEWS

7-1. Panel Section ................................................................... 54

7-2. Chassis Section ............................................................... 55

7-3. MD Mechanism Deck Section (MT-MZR909-171) ....... 56

ELECTRICAL PARTS LIST ............................... 57

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED

LINE WITH MARK 0 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 PUB-

LISHED BY SONY.

Design and specifications are subject to change

without notice.

When playing

(Unit: approx.hours)(JE ITA1))

Batteries

S P

Stereo

LP2

Stereo

LP4

Stere o

NH-14WM

nickel metal

hydride

rechargeable

battery 2)

LR6 (S G)

Sony alkaline

dry battery 3)

NH-14WM

nickel metal

hydride

rechargeable

battery 2)

+ On e LR6

(SG) 3)

1) Measured in a ccordance with the J EITA

(J apan Electronics and Informat ion

Te ch nology Indus trie s Ass ociat ion) s tan da rd.

2) When using a 100% fully charged

rechargeable ba tte ry.

3) When using a Sony LR6 (S G) "STAMINA "

a lka line dry batte ry (produce d in Ja pan)

On power sources

· Us e house current, nickel me tal hydride

rechargeable batte ry, LR6 (s ize AA) battery.

or car battery.

· For use in your house: For the s uppl ied batte ry

charging s ta nd, use the AC po wer adaptor

s uppl ied with this re corder. Do not use any other

AC power adaptor s ince it ma y cause the re corder

to ma lfuncti on.

P olarity of the

plug

AC power adap tor (1)

Headphones/earphones with a remote control

(1)

Ba tte ry cha rging sta nd (Asse mbly needed) (1)

Rechargeable battery (1)

Dry battery case (1)

Rechargeable ba tte ry carrying cas e (1)

Carrying pouch/ca rrying case with a belt clip

(1)

AC plug adaptor (Exce pt Europe, China

and HongKong models) (1)

Optica l cable (1)

Supplied accessories

3) Measured in accordance with the J EITA (J a pa n

Electronic s a nd Informa tion Technology

Indust rie s Associa tion) standard.

4) Whe n using a 100 % fully charged rechargeable

battery.

5) Whe n us ing a S ony LR6 (S G) " STAMINA "

a lka line dry battery (produce d in Japan).

CAUTION

Use of controls or adjustments or performance of procedures

other than those specified herein may result in hazardous ra-

diation exposure.

Ver 1.1

MZ-R909

NOTES ON HANDLING THE OPTICAL PICK-UP

BLOCK OR BASE UNIT

The laser diode in the optical pick-up block may suffer electro-

static break-down because of the potential difference generated

by the charged electrostatic load, etc. on clothing and the human

body.

During repair, pay attention to electrostatic break-down 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

Never look into the laser diode emission from right above when

checking it for adjustment. It is feared that you will lose your sight.

NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK

(LCX-4R)

The laser diode in the optical pick-up block may suffer electro-

static break-down easily. When handling it, perform soldering

bridge to the laser-tap on the flexible board. Also perform mea-

sures against electrostatic break-down sufficiently before the op-

eration. The flexible board is easily damaged and should be handled

with care.

OPTICAL PICK-UP FLEXIBLE BOARD

SECTION 1

SERVICING NOTES

· In performing the repair with the power supplied to the set,

removing the MAIN board causes the set to be disabled.

In such a case, fix a convex part of the open/close detect switch

(S806 on MAIN board) with a tape in advance.

Handle the FLEXIBLE board (overwrite head) with care, as it

has been soldered directly to the MAIN board.

In repairing the component side of MAIN board, connect the

FLEXIBLE board (overwrite head) and the MAIN board with

the lead wires in advance. (See page 7)

laser-tap

upper panel assy

MAIN board

Tape

S806

FLEXIBLE board

(Over write head)

· Replacement of CXD2671-209GA (IC801) used in this set re-

quires a special tool.

· The shipment data will be cleared when the NV is reset. There-

fore, change the adjusted values following the Change of Ad-

justed Values immediately after the NV was reset. (See page

18)

· If the nonvolatile memory was replaced on the set, the modified

program data must be written to the nonvolatile memory. In such

a case, write the modified data that meets the microcomputer

version following the patch data rewriting procedure at the

replacement of nonvolatile memory. (See page 23)

Notes on chip component replacement

· Never reuse a disconnected chip component.

· Notice that the minus side of a tantalum capacitor may be dam-

aged by heat.

Flexible Circuit Board Repairing

· Keep the temperature of the soldering iron around 270 °C dur-

ing repairing.

· Do not touch the soldering iron on the same conductor of the

circuit board (within 3 times).

· Be careful not to apply force on the conductor when soldering

or unsoldering.

UNLEADED SOLDER

Boards requiring use of unleaded solder are printed with the lead-

free mark (LF) indicating the solder contains no lead.

(Caution: Some printed circuit boards may not come printed with

the lead free mark due to their particular size)

: LEAD FREE MARK

Unleaded solder has the following characteristics.

· Unleaded solder melts at a temperature about 40 °C higher than

ordinary solder.

Ordinary soldering irons can be used but the iron tip has to be

applied to the solder joint for a slightly longer time.

Soldering irons using a temperature regulator should be set to

about 350 °C .

Caution: The printed pattern (copper foil) may peel away if the

heated tip is applied for too long, so be careful!

· Strong viscosity

Unleaded solder is more viscous (sticky, less prone to flow) than

ordinary solder so use caution not to let solder bridges occur

such as on IC pins, etc.

· Usable with ordinary solder

It is best to use only unleaded solder but unleaded solder may

also be added to ordinary solder.

MZ-R909

SECTION 2

GENERAL

This section is extracted from

instruction manual.

Looking at controls

See pages in ( ) for more details.

The recorder

A Display window (11) (32) (45) (55)

(70)

B T MARK button (39) (56) (67)

C END SEARCH button (23) (31) (60)

D Battery compartment (19)

E REC (record) switch (23) (28)

F HOLD switch (at the rear) (20) (74)

G Terminals for attaching dry battery

case (20)

H DC IN 3V jack (19) (22)

I OPEN button (21)

J N (play/enter) button (23) (25) (56)

X (pause) button (23) (25) (36) (43)

(56)

./> (REW/FF) buttons (23)

(25) (32) (43) (56) (68)

x (stop)/CHG button (21) (23) (25)

(40) (48) (56)

K GROUP/CANCEL button (31) (43)

(56) (61)

L Jog dial (MENU/ENTER) (11) (29)

(40) (42) (56) (70)

M LINE IN (OPT) jack (22) (28)

N MIC (PLUG IN POWER) jack (34)

The MIC (PLUG IN POWER) jack

has a tactile dot.

O VOL +/ button (25) (56)

The VOL +/ button has a tactile dot.

P i (headphones/earphones)/LINE

OUT jack (20) (40) (53)

The display window of the recorder

A Character information display (11)

(37) (45) (55) (70)

Displays the disc and track names,

date, error messages, track numbers,

etc.

B Group indication (31) (43) (57)

C Alarm indication (70)

D Disc indication (32) (45) (55) (70)

Shows that the disc is rotating for

recording, playing or editing an MD.

E Play mode indication (45)

Shows the play mode (shuffle play,

program play, repeat play, etc.) of the

MD.

F Battery indication (19) (75)

Shows approximate battery condition.

G SYNC (synchro-recording) indication

(32)

H Level meter (36) (45)

I STEREO (SP stereo), LP2 (LP2

stereo), LP4 (LP4 stereo), MONO

(monaural) indication (29)

J Pause indication

K Sound indication (48)

Lights up when Digital Sound Preset

is on.

L REC indication (23) (36)

Lights up while recording. When

flashing, the recorder is in record

standby mode.

The headphones/earphones with a remote control

A DISPLAY button (31) (38) (42) (53)

(58) (71)

B PLAYMODE button (44) (47) (58)

C RPT/ENT (repeat/enter) button (47)

(49)

D SOUND button (49)

E Clip

F X (pause) button (25) (42) (58) (61)

G Control (./N>) (25) (31)

(42) (49) (58) (71)

N> : play, AMS, FF

. : REW

Turn or turn and hold to play, fast

forward, rewind, etc.

H Control (VOL +/) (25) (58)

Pull and turn to adjust the volume.

I Display window (38) (47) (71)

J HOLD switch (20) (74)

K x (stop) button1) (25) (31) (42) (58)

(71)

1)May be used as the "Enter" button, depending

on the function.

The display window of the remote control

A Track number display (38) (47) (71)

B Character information display (38)

(47) (53) (71)

C Disc indication (38) (47) (71)

D Alarm indication (71)

E Play mode indication (47)

F Battery level indication (38) (47) (71)

G REC indication (23) (38)

H SOUND indication (49)

A B C DE

MZ-R909

· This set can be disassembled in the order shown below.

3-1.

DISASSEMBLY FLOW

SECTION 3

DISASSEMBLY

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

3-2.

PANEL ASSY, BOTTOM

3-2. Panel Assy,

Bottom

3-3. Panel Assy,

Upper Section

Set

3-4. "LCD Module",

"Panel Assy, Upper"

3-6. "Case Assy, Battery",

"Main Board"

3-8. "MD Mechanism Deck

(MT-MZR909-171)",

"Chassis Assy, Set"

3-7. Strip,

Ornamental

3-5. Main Board Assy

3-9. Service Assy, OP

(LCX-4R)

3-10. Holder Assy

3-11. Motor, DC (Sled) (M602)

3-12. "Motor, DC (Spindle) (M601)",

"Motor, DC (Over Write Head Up/Down)

(M603)"

S801

Open the lid,

battery case.

Close the battery

terminal (plus).

Remove the "panel assy, bottom"

in the direction of the arrow A.

knob (hold)

lid,

battery case

claw

two ES lock screws

three ES lock screws

Note: On installation,

adjust the position of both

switch (S801) and knobs(hold).