Sony MZ-R909 User Manual

MZ-R909

SERVICE MANUAL

Ver 1.0 2001. 08

US and foreign patents licensed from Dolby Laboratories.

SPECIFICATIONS

Audio playing system

MiniDisc digital audio system

Laser diode properties

Material: GaAlAs Wavelength: = 790 nm Emission duration: continuous Laser outp u t: less than 44. 6 µW (This output is the value measured at a distance of 200 m m from the lens surface on the optical pick-up blo ck with 7 mm ap er ture .)

Recording and playback time

When using MDW-80:

Revolutions

350 rp m to 2,800 rpm (CLV)

Err o r c o rrection

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) AT R AC 3 — L P 2 AT R AC 3 — L P 4

Modulation system

EFM (Eight to Fourteen Mo dula tion)

Number of channels

2 stereo channels 1 monaura l channel

Frequency response

20 to 20, 000 Hz ± 3 dB

Maxim um 160 min. in monaur a l Maxim um 320 min. in stereo

Wo w an d Flutter

Below measurable limit

Inputs

Microphone : stereo mini-jack, minimum input level 0.25 mV

Line in

: stereo mini-ja ck, minimum input level 49 mV Op tical (Digital) in

Outputs

i/LINE OUT2): stereo min i-jack

headphones/earphones: maximum output level 5 mW + 5 mW, load impedance 16 ohm LINE OUT: 194 mV, loa kilohm

Po wer requirements

Sony AC Power Adaptor connected at the DC IN 3V jack:

230 - 240 V AC, 50 Hz (Hong kong model)

10 0 - 240 V AC, 50 /60 Hz (Oth er models) Nicke l meta l hydr id e rechageable battery NH14WM(A) 1.2V 135 0 mAh (MIN) Ni-MH LR6 (s ize AA) alkaline battery

Dimensions

Approx. 78.9 × 72.0 × 17. 1 mm (w/h/d)

/8 × 27/8 × 11/16 in.)

Mass

Approx. 110 g (3.9 oz) the recorder only

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

e ither a digital (o p tical) cable or a line (analog) cable.

The i/LINE OUT jack connector either

headphones/earphones or a line c a ble.

Measured in accordance with JEITA.

: o ptical (digital) mini-jack

E Model

Tourist Model

Model Name Using Similar Mechanism NEW Mechanism Type MT-MZR909-171 Optical Pick-up Name LCX-4R

Battery operating time

(Unit: approx hours)(JEITA3))

LP2

Stereo

8.5 11 1 4

7.5 12 1 5

20 28 37

– Continued on next page –

d impedance 10

Battery life

When recording

Batteries SP

NH-14WM nickel metal hydride rechargeable battery

LR6 (SG) S ony alkaline dry battery

NH-14WM nickel metal hydride rechargeable battery + One LR6

(SG)

The battery life may be shorter due to operating conditions and the tempreture of the location.

When y ou record, use a fully charged rechargeable ba ttery. Recording time may diffe r according to the alka li ne batteries.

LP4 Stereo

9-873-285-01 Sony Corporation

2001H0500-1 Personal Audio Company C 2001.8 Shinagawa Tec Service Manual Production Group

PORTABLE MINIDISC RECORDER

MZ-R909

Measured in accordance with the JEITA (Japan Electronic s a nd Inform ation Technology Indust ries Assoc ia tion) standard .

When using a 100 % fully charged rechargeable battery.

Whe n using a Sony LR6 (SG) “STAMINA” a lkaline dry battery (p r oduced in Japan).

When playing

Batteries SP

NH-14WM nickel metal hydride rechargeable battery

LR6 (SG) Son y alkaline dry battery

NH-14WM nickel metal hydride rechargeable battery + On e LR6 (SG)

Measured in accord ance with the JEITA (Japan Electron ic s and Info r mation Te ch nolog y Industries Ass ociat ion) s tan dard.

When using a 100% fu lly charge d rechargeable ba ttery.

When using a Sony LR6 (SG) “STAMINA ” a lkaline dry battery (p roduced in Japan)

Supplied accessories

AC power adap tor (1) Headphones/earphones with a r emote control (1) Batte r y c ha rging stand (Assem bly needed) (1) Rechargeable battery (1) Dry battery case (1) Rechargeable b a tte ry carrying cas e (1 ) Carrying pouch/carrying case with a belt clip (1) AC plug adaptor (Except (1) Optical cable (1 )

On power sources

• Us e house current, n ickel metal hydride

rechargeable b attery, LR6 (s ize AA) battery. or car battery.

•

For use in your house:For the supplied batter y charging sta nd, use the AC power adapt or suppl ied with this recorder. Do not use any other AC power adaptor since it may cause the recorder to ma lfuncti on.

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

LP2

Stereo

24 27 31

34 40 45

64 75 84

HongKong

LP4 Stereo

model)

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

2. GENERAL ................................................................... 4

3. DISASSEMBLY

3-1. Disassembly Flow ........................................................... 5

3-2. Panel Assy, Bottom ......................................................... 5

3-3. Panel Assy, Upper Section .............................................. 6

3-4. “LCD Module”, “Panel Assy, Upper” ............................ 6

3-5. MAIN Board Assy .......................................................... 7

3-6. “Case Assy, Battery”, “MAIN Board” ........................... 7

3-7. Strip, Ornamental ............................................................ 8

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

“Chassis Assy, Set” ......................................................... 8

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

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

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

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

6. 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

7. EXPLODED VIEWS

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

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

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

P olarity of th e plug

Design and specifications are subject to change without notice.

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 MANU AL OR IN SUPPLEMENTS PUBLISHED BY SONY.

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

SECTION 1

upper panel assy

MAIN board

Tape

S806

FLEXIBLE board (Over write head)

SERVICING NOTES

MZ-R909

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

The laser diode in the optical pick-up block may suffer electrostatic 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 electrostatic break-down easily. When handling it, perform soldering bridge to the laser-tap on the flexible board. Also perform measures against electrostatic break-down sufficiently before the operation. The flexible board is easily damaged and should be handled with care.

• 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 conv ex part of the open/close detect s witch (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)

CAUTION

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

Notes on chip component replacement

• Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be damaged by heat.

Flexible Circuit Board Repairing

• Keep the temperature of the soldering iron around 270 ˚C during 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.

laser-tap

OPTICAL PICK-UP FLEXIBLE BOARD

• Replacement of CXD2671-206GA (IC801) used in this set requires a special tool.

• The shipment data will be cleared when the NV is reset. Therefore, change the adjusted values following the Change of Adjusted Values immediately after the NV was reset. (See page

18)

• If the nonvolatile memory was replaced on the set, the modif ied 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)

UNLEADED SOLDER

Boards requiring use of unleaded solder are printed with the leadfree 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

Looking at controls

See pages in ( ) for more details.

SECTION 2

GENERAL

This section is extracted from instruction manual.

The recorder

1 2 3 4

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)

qs qd

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/earp hones)/LINE

OUT jack (20) (40) (5 3)

The display window of the recorder

1324567

A Character information di splay (11)

(37) (45) (55) (70) Displays the disc and track names, date, error messages, track numbers, etc.

B Group indica ti on (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 indica t i on (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.

qsqaq;98

The headphones/earphones with a remote control

A B C DE

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

(58) (71)

B PLAYMODE button (44) (47) (58) C RPT/ENT (repeat/e nter) 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 pl ay, 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) button

(71)

May be used as the “Enter” button, depending

on the function.

(25) (31) (42) (58)

The display window of the remote control

BCDE

A Track number display (38) (47) (71) B Character information displ ay (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)

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

3-1. DISASSEMBLY FLOW

Set

MZ-R909

SECTION 3

DISASSEMBLY

3-2. Panel Assy,

Bottom

3-7. Strip,

Ornamental

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

3-3. Panel Assy,

Upper Section

3-8. “MD Mechanism Deck

(MT-MZR909-171)”, “Chassis Assy, Set”

3-2. PANEL ASSY, BOTTOM

3-5. Main Board Assy

3-4. “LCD Module”,

“Panel Assy, Upper”

3-9. Service Assy, OP

(LCX-4R)

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

3-12. “Motor, DC (Spindle) (M601)”,

“Motor, DC (Over Write Head Up/Down) (M603)”

3-6. “Case Assy, Battery”,

“Main Board”

3-10. Holder Assy

Note: On installation,

adjust the position of both switch (S801) and knobs(hold).

two ES lock screws

knob (hold)

S801

Close the battery terminal (plus).

Open the lid, battery case.

three ES lock screws

Remove the “panel assy, bottom” in the direction of the arrow

lid, battery cas

claw

MZ-R909

3-3. PANEL ASSY, UPPER SECTION

two ES lock screws

panel assy, upper

flexible board (CN801)

two ES lock screws

3-4. “LCD MODULE”, “PANEL ASSY, UPPER”

Remove the LCD module in the direction of the arrow.

Push the button (open).

four screws (1.7)

panel assy, upper

3-5. MAIN BOARD ASSY

flexible board (CN501)

main board assy

Remove two solder of flexible board.

MZ-R909

four screws (M1.4 toothed lock)

ES lock screw

3-6. “CASE ASSY, BATTERY”, “MAIN BOARD”

case assy, battery

flexible board (CN502)

main board

Remove the solder of terminal (plus).

Remove the solder of terminal (minus).

MZ-R909

3-7. STRIP, ORNAMENTAL

Remove the “strip, ornamental” in the direction of arrow

Note: As the “strip, ornamental”

is very fragile, do not give an excessive force to the entire assy when removing it.

three bosses

two convex portions pointed with

Pull toward the direction to disengage two bosses .

)

Open toward the direction to disengage two bosses and convex portions pointed

with

)

boss

)

Open toward the direction to disengage two bosses and convex portions pointed

with

boss

3-8. “MD MECHANISM DECK (MT-MZR909-171)”, “CHASSIS ASSY, SET”

boss

MD mechanism deck (MT-MZR909-171)

boss

spring (arm), tension

screw (1.4)

chassis assy, se

screw (1.4)

3-9. SERVICE ASSY, OP (LCX-4R)

washer (0.8-2.5)

screw (M1.4)

spring, rack

gear (SA)

screw (M1.4)

spring, thrust detent

Pull off “screw, lead”

MZ-R909

service assy, OP (LCX-4R)

over write head section

Opening the over write head toward the direction (LCX-4R) toward the direction

Note: Do not open the entire assy forcibly,

, remove the “service assy, OP

when opening the over write head.

MZ-R909

3-10. HOLDER ASSY

Remove the holder assy in the direction of arrow

Open the holder assy.

Push the convex portion toward the direction open the holder assy toward the direction

Remove the concave portion in the direction of arrow

to erect uprightly.

and

3-11. MOTOR, DC (SLED) (M602)

gear (SA)

two screws (M1.4)

motor, DC (sled) (M602)

boss

washer (0.8-2.5)

Remove six solders of motor flexible board.

MZ-R909

3-12. “MOTOR, DC (SPINDLE) (M601)”, “MOTOR, DC (OVER WRITE HEAD UP/DOWN) (M603)”

Remove six solders of motor flexible board.

three screws (M1.4)

motor, DC (spindle) (M601)

motor, DC (over write head up/down) (M603)

two screws (M1.4)

chassis assy, gear

screw (M1.2)

Note: Press-fit the gear (HA) up to the

position of the “motor, DC (over write head up/down) (M603) as shown below.

gear (HA)

2.65 mm chassis assy, gear

motor, DC (over write head up/down) (M603)

gear (HA)

gear (HB)

washer (0.8-2.5)

gear (HC)

MZ-R909

SECTION 4

TEST MODE

Outline

• This set provides the Overall adjustment mode that allows CD and MO discs to be automatically adjusted when in the test mode. In this overall adjustment mode, the disc is discriminate between CD and MO, and each adjustment is automatically executed in order. If a fault is f ound, the system displays its location. Also, the manual mode allows each individual adjustment to be automatically adjusted.

• Operation in the test mode is performed with the set. A key having no particular description in the text, indicates a set key.

• For the LCD display, the LCD on the r emote commander is shown, but the contents of LCD display on the set are same.

Setting Method of Test Mode

There are two different methods to set the test mode: 1 Short SL801 (TEST) on the MAIN board with a solder bridge

(connect pin 3 of IC801 to the ground) and turn on the [HOLD] switch. Then, turn on the power.

Operation in Setting the Test Mode

• When the test mode becomes active, first the display check mode is selected.

• Other mode can be selected from the display check mode.

• When the test mode is set, the LCD repeats the following display.

Remote commander LCD display

All lit

All off

Microcomputer version display

Destination code 002 : Except US, Canadian models 003 : US, Canadian models

888

003 V1.000

BASS12

S801

[HOLD]

switch

ON (HOLD)

OFF

SL801

(TEST)

137

135

6673

C810

C815

81 63 68

C842

5860

X801

615762 565455 534959

C830

475044 453635

L801

513031

2 In the normal mode, turn on the [HOLD] switch. While press-

ing the [VOL --] key press the following order:

> t > t . t . t > t

. t > t . t X t X

• When the X key is pressed and hold down, the display at that time is held so that display can be checked.

Caution: On the set having the microcomputer version 1.000,

some adjusted values were set in the manual mode at the shipment, but these data will be cleared when the NV is reset. Therefore, on the set having the microcomputer version 1.000, change the adjusted values following the Change of Adjusted Values immediately after the NV was reset (see page 18).

Releasing the Test Mode

For test mode set with the method 1: Turn off the power and open the solder bridge on SL801 (TEST) on the MAIN board.

Note: Remove the solders completely. Remaining could be shorted with

the chassis, etc.

For test mode set with the method 2: Turn off the power.

Note: On the set having the microcomputer version 1.000, if electrical

adjustment (see page 18) has not been finished completely , alw ays start in the test mode. (The set cannot start in normal mode) On the set having the microcomputer version 2.000 or later, if electrical adjustment (see page 18) has not been finished completely, “NV Error” is displayed on the LCD.

MZ-R909

Configuration of Test Mode

[Test Mode $Display Check Mode%]

Press the

[VOL +]

key

[Manual Mode]

Press the

key

[Servo Adjustment] [Audio Adjustment] [Power Supply Adjustment]

[OP Alignment Adjustment]

Press the

[VOL --]

key

[Overall Adjustment Mode]

Press the

Turn the jog dial (down), or press the

key

[DISPLAY]

[Electrical Offset Adjustment]

Power Supply Adjustment Auto Item Feed

CD Overall Adjustment/ MO Overall Adjustment

key on the remote commander

[Self-Diagnosis Result Display Mode]

Press the

key

[REC]

key

[Sound Skip Check Result Display Mode]

Press the

Press the on the remote commander for several seconds (about 3 seconds)

key

[T MARK]

key, or

[DISPLAY]

key

[Key Check Mode]

The key check quits, or open the upper panel

Manual Mode

Mode to adjust or check the operation of the set by function. Normally, the adjustment in this mode is not executed. However, the Manual mode is used to clear the memory, power supply adjustment, and laser power check before performing automatic adjustments in the Overall Adjustment mode.

[Major item switching]

key

[Medium item switching]

key

[Minor item switching]

[VOL +] key:100th place of item number

increase.

[VOL --] key:100th place of item number

decrease.

[VOL +]

key:10th place of item number

increase.

[VOL --] key:10th place of item number

decrease.

key: Unit place of item number

increase.

key:Unit place of item number

decrease.

[Adjusted value variation] [VOL +] key:Increases the adjusted

value of the 1st digit

[VOL --] key:Decreases the adjusted

value of the 1st digit

[PLAY MODE] key of

the remote commander: Increase the adjusted value of the 2nd digit

[SOUND] key of the remote commander:

Decrease the adjusted value of the 2nd digit

[Adjusted value write]

key: When adjusted value is

changed: Adjusted value is written. When adjusted value is not changed: That item is adjusted automatically.

• Transition method in manual mode

1. Set the test mode (see page 12).

2. Press the > or[VOL +] key activates the manual mode where the LCD display as shown below.

Remote commander LCD display

000 Manual

3. During each test, the optical pick-up moves outward or inward while the > or . key is pressed for several seconds respectively.

4. Each test item is assigned with a 3-digit item number; 100th place is a major item, 10th place is a medium item, and unit place is a minor item. The values adjusted in the test mode are written to the nonvolatile memory (for the items where adjustment was made).

MZ-R909

5. The display changes a shown below each time the jog dial (down) is turned or the [DISPLAY] key on the remote commander is pressed.

• Address & Adjusted Value Display

Remote commander LCD display

011 C68S01

item number

address

• Jitter Value & Adjusted Value Display

Remote commander LCD display

adjusted value

011 OFFJ01

item number

jitter value

• Block Error Value & Adjusted Value Display

Remote commander LCD display

adjusted value

011 063B01

block error value

item number

• ADIP Error Value & Adjusted Value Display

Remote commander LCD display

adjusted value

011 059A01

ADIP error value

item number

• Focus Drive Value & Adjusted Value Display

Remote commander LCD display

adjusted value

011 015F01

Self-Diagnosis Result Display Mode

This set uses the self-diagnostic function system in which if an error occurred during the recording or playing, the mechanism control block and the power supply control block in the microcomputer detect it and record its cause as history in the nonvolatile memory. By checking this history in the test mode, you can analyze a fault and determine its location. Total recording time is recorded as a guideline of how long the optical pickup has been used, and by comparing it with the total recording time at the time when an error occurred in the selfdiagnosis result display mode, you can determine when the error occurred. Clear both self-diagnosis history data and total recording time, if the optical pickup was replaced.

• Self-diagnosis result display mode setting method

1. Set the test mode (see page 12).

2. In the display check mode, turn the jog dial (down) or press the

[DISPLAY] key on the remote commander activates the self-

diagnosis result display mode where the LCD display as shown below.

Remote commander LCD display

0XX 1 0000

history code

error display code

3. Then, each time the > key is pressed, LCD display descends by one as shown below. Also, the LCD display ascends by one when the

. key is pressed.

Total recording time when error occurre

focus drive value

item number

• Item Title Display

Remote commander LCD display

adjusted value

011 LrefPw 01

item number

item title

However in the power mode (item number 700’s), only the item is displayed.

6. Quit the manual mode, and press the test mode (display check mode).

Overall Adjustment Mode

Mode to adjust the servo automatically in all items. Normally, automatic adjustment is executed in this mode at the repair. For further information, refer to “Section 5 Electrical Adjustments” (see page 18).

adjusted value

x key to return to the

0XX 1 ****

0XX N ****

0XX N1**** 0XX N2**** 0XX R_****

: Error code

****

: Total recording time

If the jog dial (down) is turned or the [DISPLAY] key on remote commander is pressed with this display, the LCD switches to the simple display mode.

4. Quit the self-diagnosis result display mode, and press the x key to return to the test mode (display check mode).

MZ-R909

• Description of error indication codes

Problem Indication code Meaning of code Simple display Description

No error 00 No error --- No error

Servo system error 02 High temperature Temp High temperature detected

03 Focus error Fcus Disordered focus or can not read an address 04 Spindle error Spdl Abnormal rotation of disc

TOC error

Power supply system error 22 Low battery LBat Momentary interruption detected

Offset system error

11 TOC error TOC Faulty TOC contents 12 Data reading error Data Data could not be read at SYNC

31 Offset error Ofst Offset error

Illegal access target address was specified

Focus error ABCD offset error

Tracking error Offset error

X1 tracking error Offset error

Adrs Attempt to access an abnormal address

ABCD Focus error ABCD offset error

TE Tracking error Offset error

X1TE X1 tracking error Offset error

• Description of indication history

History code number Description

1 The first error N The last error N1 One error before the last. N2 Two errors before the last. R_ Total recording time

Reset the Error Display Code

After servicing, reset the error display code.

• Setting method of reset the error display code

1. Set the test mode (see page 12).

2. Turn the jog dial (down) or press the [DISPLAY] key on the remote commander activates the self-diagnosis result display mode.

3. To reset the error display code, press the X key (twice) when the code is displayed (except “R_****”). (All the data on the 1, N, N1, and N2 will be reset)

MZ-R909

Sound Skip Check Result Display Mode

This set can display the count of errors that occurred during the recording/playing for checking.

• Setting method of sound skip check result display mode

1. Set the test mode (see page 12).

2. Press the N key or [REC] ke y, and the playing or recording

sound skip result display mode becomes active respectively where the LCD displays the following.

Remote commander LCD display

000 P**R**

Total count of record

Total count of play system errors (hex.)

3. When the N key is pressed, total error count is displayed on

the LCD, and each time the > key is pressed, the display item moves down by one as shown belo w . Also, if the . key is pressed, the display item moves up by one, then if the [REC] key is pressed, the display in the record mode appears. When the [REC] key is pressed, total error count is displayed on the LCD, and each time the > key is pressed, the display item moves down by one as shown belo w . Also, if the . key is pressed, the display item moves up by one, then if the N key is pressed, the display in the play mode appears.

Playing sound skip result display

system errors (hex.)

Recording sound skip result display

Jog and Key Check Mode

This set can check if the set and remote commander function normally.

• Setting method of jog check mode

1. Set the test mode (see page 12).

2. Press the jog button to activate the jog check mode and display as below.

Remote commander LCD display

000 PUSH

3. Turn the jog dial downwards one click.

Remote commander LCD display

000 JOG+ 1

4. Turn the jog dial downwards three more clicks.

Remote commander LCD display

000 JOG+OK

5. Turn the jog dial upwards one click.

Remote commander LCD display

000 JOG- 1

000 P**R**

000 EIB **

000 Stat** 000 Adrs** 000 BEmp**

000 P**R**

000 BOvr**

000 Bful** 000 Rtry** 000 ######

000 ######

P**R**

: Total play/record errors (hex.)

: Counter of sound skip check each item (hex.)

######

: 6-digit address where sound was skipped last (hex.)

• Cause of sound skip error

Cause of error Description of error

EIB Sound error correction error

Play

Record

4. To quit the sound skip check r esult display mode and to return to the test mode (display check mode), press the x key.

Stat Decoder status error Adrs Address access error BEmp Buffer is empty

BOvr

Bful Rtry Retry times over

Buffer is full, and sounds were dumped

Buffer capacity becomes less, and forcible writing occurred

6. Turn the jog dial upwards three more clicks.

Remote commander LCD display

000 JOG OK

7. When the mode.

Note: T o enter the key check mode, it is not necessary to enter via the jog

dial check mode. (Refer to next item)

• Setting method of key check mode

1. Set the test mode (see page 12).

2. Press the [T MARK] key or [DISPLAY] key on the remote commander for several seconds (about 3 seconds) activates the key check mode. (At the last two digits, AD value of remote commander key line is displayed in hexadecimal)

Remote commander LCD display

x key is pressed, it changes over to the key check

000 **

: AD value of the remote commander key (hexadecimal

00 to FF)

3. When each key on the set and on remote commander is pressed, its name is displayed on the remote commander LCD. (The operated position is displayed for 4 seconds after the slide switch is operated. If any other key is pressed during this display, the remote commander LCD switches to its name display)

Example1: When the > key on the set is pressed:

Remote commander LCD display

000 FF **

: AD value of the remote commander key (hexadecimal

00 to FF)

Example2: When the N > key on the remote commander

is pressed:

Remote commander LCD display

000 rPLAY **

: AD value of the remote commander key (hexadecimal

00 to FF)

4. When all the keys on the set and on the remote commander are considered as OK, the following displays are shown for 4 seconds.

Example1: When the keys on the set are considered as OK:

MZ-R909

Remote commander LCD display

888 SET OK **

: AD value of the remote commander key (hexadecimal

00 to FF)

Example2: When the keys on the remote commander are con-

sidered as OK:

Remote commander LCD display

888 RMC OK **

: AD value of the remote commander key (hexadecimal

00 to FF)

5. When all keys were checked or if the upper panel is opened,

the key check mode quits and the test mode (display check mode) comes back.

MZ-R909

SECTION 5

ELECTRICAL ADJUSTMENTS

Outline

• In this set, automatic adjustment of CD and MO can be performed by entering the test mode (see page 12). However, before starting automatic adjustment, the memory clear, power supply adjustment, and laser power check must be performed in the manual mode.

• A key having no particular description in the text, indicates a set key.

• For the LCD display, the LCD on the r emote commander is shown, but the contents of LCD display on the set are same.

Precautions for Adjustment

1. Adjustment must be done in the test mode only.

After adjusting, release the test mode.

2. Use the following tools and measuring instruments.

• Test CD disc TDYS-1 (Part No. : 4-963-646-01)

• SONY MO disc available on the market

• Digital voltmeter

• Laser power meter LPM-8001 (Part No. : J-2501-046-A)

• Thermometer (using the Temperature Correction)

3. Unless specified otherwise, supply DC 3V from the DC IN 3V jack (J601).

4. Switch position

HOLD switch ............................................... ON

Adjustment Sequence

1. NV Reset (EEPROM clear)

2. Power Supply Manual Adjustment

3. Temperature Correction (item number: 014)

4. Laser Power Check

5. Electrical Offset Adjustment

Caution: This adjustment must be made with

no disc loaded.

r Overall Mode

6. CD Overall Adjustment

7. MO Overall Adjustment

8. RESUME Clear

 

Manual Mode

 



Overall Mode

 

 

Manual Mode

 

        



Manual Mode

 

NV Reset

Caution: The shipment data will be cleared when the NV is reset.

Therefore, change the adjusted values following the Change of Adjusted Values immediately after the NV was reset.

• Setting method of NV reset

1. Select the manual mode of the test mode, and set item number 021 NV Reset (see page 13).

Remote commander LCD display

021 ResNV CC

2. Press the X key .

Remote commander LCD display

021 ResOK?

3. Press the X key once more.

Remote commander LCD display

021 Res***

NV reset (after several seconds)

021 Reset!

4. Press the x key to quit the manual mode, and return the test mode (display check mode).

• Change of adjusted values

In this set, some adjusted values were set in the manual mode at the shipment, but these data will be cleared when the NV is reset. Therefore, modify the adjusted values through the following procedure immediately after the NV was reset.

1. Item numbers in which the adjusted values are to be modified Item number 861 Item number 862 Item number 863 Item number 864 Item number 865 Item number 866

2. Adjusted values modifying procedure

1) Select the manual mode of the test mode, and set item number 861 (see page 13).

Remote commander LCD display

861 V1num **

: Adjusted value

2) Adjust with the key (adjusted value do wn) so that the adjusted value becomes 0F.

3) Press the X key to write the adjusted value.

4) Select the manual mode of the test mode, and set item number 862 (see page 13).

Remote commander LCD display

[VOL+] key (adjusted value up) or [VOL--]

862 V1dat **

: Adjusted value

5) Adjust with the [VOL+] key (adjusted value up) or [VOL--] key (adjusted value do wn) so that the adjusted value becomes 0B.

6) Press the X key to write the adjusted value.

MZ-R909

7) Select the manual mode of the test mode, and set item number 863 (see page 13).

Remote commander LCD display

863 V2num **

: Adjusted value

8) Adjust with the [VOL+] key (adjusted value up) or [VOL--] key (adjusted value do wn) so that the adjusted value becomes

87.

9) Press the X key to write the adjusted value.

10) Select the manual mode of the test mode, and set item number 864 (see page 13).

Remote commander LCD display

864 V2dat **

: Adjusted value

11) Adjust with the [VOL+] key (adjusted value up) or [VOL--] key (adjusted value do wn) so that the adjusted value becomes

39.

12) Press the X key to write the adjusted value.

13) Select the manual mode of the test mode, and set item number 865 (see page 13).

Remote commander LCD display

865 V3num **

: Adjusted value

14) Adjust with the [VOL+] key (adjusted value up) or [VOL--] key (adjusted value do wn) so that the adjusted value becomes

23.

15) Press the

16) Select the manual mode of the test mode, and set item number 866 (see page 13).

Remote commander LCD display

X key to write the adjusted value.

866 V3dat **

: Adjusted value

17) Adjust with the [VOL+] key (adjusted value up) or [VOL--] key (adjusted value do wn) so that the adjusted value becomes EC.

18) Press the X key to write the adjusted value.

Power Supply Manual Adjustment

• Adjustment sequence

Adjustment must be done with the following steps.

4. Turn the jog dial (up), or press the [PLAYMODE] key on the remote commander. (Turning the jog dial (up), or pressing the [PLAYMODE] key on the remote commander causes the item number to be switched to 762)

• Adjustment method of Vc PWM Duty (L)

(item number: 762)

Remote commander LCD display

762 Vc1PWM **

: Adjusted value

1. Connect a digital voltmeter to the AP914 (VC) on the MAIN board, and adjust [VOL +] key (voltage up) or [VOL --] key (voltage down) so that the voltage becomes 2.40 V.

digital

voltmete

MAIN board

AP914 (VC)

AP912 (GND)

2. Press the X key to write the adjusted value. (The item number changes to 763 when X key is pressed)

Adjustment and Connection Location:MAIN board

(see page 20)

• Adjustment method of Vc PWM Duty (H)

(item number: 763)

Remote commander LCD display

+ 0.005 – 0.01

763 VchPWM **

: Adjusted value

1. Connect a digital voltmeter to the AP914 (VC) on the MAIN board, and adjust (voltage down) so that the voltage becomes 2.75 ± 0.015 V.

2. Press the (The item number changes to 764 when X key is pressed)

X key to write the adjusted value.

[VOL +] key (voltage up) or [VOL --] key

digital

voltmete

MAIN board

AP914 (VC)

AP912 (GND)

1. Vc PWM Duty (L) adjustment (item number: 762)

2. Vc PWM Duty (H) adjustment (item number: 763)

3. Vl PWM Duty adjustment (item number: 764)

• Setting method of power supply manual adjustment

1. Make sure that the power supply voltage is 3V.

2. Set the test mode (see page 12).

3. Press the mode.

Remote commander LCD display

. or [VOL--] key to activate the overall adjustment

000 Assy00

Adjustment and Connection Location:MAIN board

(see page 20)

• Adjustment method of Vl PWM Duty (item number: 764)

Remote commander LCD display

764 Vl PWM **

: Adjusted value

1. Connect a digital voltmeter to the AP915 (VL) on the MAIN

board, and adjust (voltage down) so that the voltage becomes 2.30 V.

AP912 (GND)

[VOL +] key (voltage up) or [VOL --] key

digital

voltmete

MAIN board

AP915 (VL)

+ 0.005 – 0.01

+ 43 hidden pages

Sony MZ-R909 User Manual

TABLE OF CONTENTS

SERVICING NOTES

GENERAL

3-1. DISASSEMBLY FLOW

DISASSEMBLY

3-2. PANEL ASSY, BOTTOM

3-3. PANEL ASSY, UPPER SECTION

3-4. “LCD MODULE”, “PANEL ASSY, UPPER”

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”

service assy, OP (LCX-4R)

motor, DC (sled) (M602)

TEST MODE

ELECTRICAL ADJUSTMENTS