Sony MZR-55 Service manual

MICROFILM

MZ-R55

SERVICE MANUAL

Ver 1.5 2001. 01 With SUPPLEMENT-1 (9-924-964-85)

US and foreign patents licensed from Dolby Laboratories Licensing Corporation.

SPECIFICATIONS

System

Audio playing system

MiniDisc digital audio system

Laser diode properties

Material: GaAlAs Wavelength: λ = 780 nm Emission duration: continuous Laser output: less than 44.6 µW (This output is the value measured at a distance of 200 mm from the lens surface on the optical pick-up block with 7 mm aperture.)

Recording and playback time

Maximum 74 minutes (MDW-74, stereo recording) Maximum 148 minutes (MDW-74, monaural recording)

Revolutions

400 rpm to 900 rpm (CLV)

Error correction

Advanced Cross Interleave Reed Solomon Code (ACIRC)

Sampling frequency

44.1 kHz

Sampling rate converter

Input: 32 kHz / 44.1 kHz / 48 kHz

Coding

Adaptive TRansform Acoustic Coding (ATRAC)

Modulation system

EFM (Eight to Fourteen Modulation)

Number of channels

2 stereo channels 1 monaural channel

US Model

Canadian Model

AEP Model

UK Model

E Model

Australian Model

Tourist Model

Model Name Using Similar Mechanism NEW MD Mechanism T ype MT-MZR55-161 Optical Pick-up T ype KMS-280A

Frequency response

20 to 20,000 Hz ± 3 dB

Wow and Flutter

Below measurable limit

Inputs

Microphone: stereo mini-jack, 0.22-0.78 mV Line in: stereo mini-jack, 69-194 mV Optical (Digital) in: optical (digital) mini-jack

Outputs

Headphones: stereo mini-jack, maximum output level 5 mW+ 5 mW, load impedance 16 ohm Line out: stereo mini-jack, 194 mV, load impedance 10 kilohm

General

Power requirements

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

120 V AC, 60 Hz (US model) 220-240 V AC, 50/60 Hz (Hong Kong model)

100-240 V AC, 50/60 Hz (Tourist model) Nickel metal hydride rechargeable battery NH-14WM (supplied) Two LR6 (size AA) alkaline batteries (not supplied)

– Continued on next page –

PORTABLE MINIDISC RECORDER

– 1 –

Battery operation time

Batteries Recording Playback

NH-14WM nickel Approx. Approx. metal hydride

rechargeable battery Two LR6 (SG) Approx. Approx.

Sony alkaline dry batteries 5 hours 10 hours NH-14WM + Two LR6 (SG)

Dimensions

Approx. 78.9 × 18.9 × 84 mm (w/h/d) (3 1/8 × 3/4 × 3 3/8 in.)

Mass

Approx. 147 g (5.2 oz) the recorder only Approx. 190 g (6.7 oz) incl. a recordable MD, and NH-14WM nickel metal hydride rechargeable battery

Supplied accessories

AC power adaptor AC-MZR55 (1) Headphones with a remote control MDR-A34SP (US model)/MDR-E838SP (Hong Kong, Tourist model) and RM-MZR55 (1) NH-14WM nickel metal hydride rechargeable battery (1) Dry battery case (1) Rechargeable battery carrying case (1) Carrying pouch (1) AC plug adaptor (1) (Tourist model only)

Design and specifications are subject to change without notice.

2.5 hours 4 hours

Approx. Approx.

9.5 hours 16 hours

Precautions for Laser Diode Emission Check

When checking the emission of the laser diode during adjustments, never view directly downwards as this may lead to blindness.

This MiniDisc player is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT label is located on the bottom exterior.

IN NO EVENT SHALL SELLER BE LIABLE FOR ANY DIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES OF ANY NATURE, OR LOSSES OR EXPENSES RESULTING FROM ANY DEFECTIVE PRODUCT OR THE USE OF ANY PRODUCT.

“MD WALKMAN” is a trademark of Sony Corporation.

CAUTION

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

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.

Precautions for Using Optical Pick-up (KMS-280A)

As the laser diode inside the optical pick-up damages by static electricity easily, solder the laser tap of the Optical pick-up flexible board when handling. Also take the necessary measures to prevent damages by static electricity. Handle the Optical pickup flexible board with care as it breaks easily.

Laser tap

Optical Pick-up flexible board

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.

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK ! OR DO TTED 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.

ATTENTION AU COMPOSANT AYANT RAPPORT

À LA SÉCURITÉ!!

LES COMPOSANTS IDENTIFIÉS P AR UNE MARQUE ! SUR LES DIAGRAMMES SCHÉMA TIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.

– 2 –

TABLE OF CONTENTS

1. GENERAL....................................................................... 4

2. SELF-DIAGNOSTIC

2-1. General ..................................................................... 5

2-2. Test Mode Setting..................................................... 5

2-3. Operation in Test Mode Setting ................................ 5

2-4. Releasing the Test Mode........................................... 5

2-5. Self-Diagnostic Mode............................................... 5

2-6. Clearing the Error Indication Code

and Total Recording Time ........................................ 6

3. DISASSEMBLY

3-1. Bottom Panel Assy ................................................... 7

3-2. Connector ................................................................. 7

3-3. Upper Panel Block Assy........................................... 8

3-4. LCD Block Assy....................................................... 8

3-5. Ornamental Belt Block Assy .................................... 9

3-6. Main Board ............................................................... 9

3-7. Chassis (Main) Assy............................................... 10

3-8. OP Block Assy........................................................ 10

3-9. Holder Assy ............................................................ 11

4. TEST MODE

4-1. General ................................................................... 12

4-2. Test Mode Setting................................................... 12

4-3. Test Mode Structure ............................................... 12

4-4. Manual Mode ......................................................... 12

4-5. Overall Adjustment Mode ...................................... 15

4-6. Hybrid Mode, Key Check Mode ............................ 16

5. ELECTRICAL ADJUSTMENTS........................... 17

6. DIAGRAMS

6-1. IC Pin Descriptions ................................................ 21

6-2. Block Diagram – Servo Section – .......................... 25

6-3. Block Diagram – Audio Section –.......................... 27

6-4. Block Diagram – System Control Section –........... 29

6-5. Printed Wiring Board (-11)..................................... 31

6-6. Printed Wiring Board (-12)..................................... 34

6-7. Printed Wiring Board (-13)..................................... 37

6-8. Schematic Diagram – Main Section (1/3) – ........... 40

6-9. Schematic Diagram – Main Section (2/3) – ........... 43

6-10. Schematic Diagram – Main Section (3/3) – ........... 46

7. EXPLODED VIEWS

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

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

7-3. Mechanism Deck Section ....................................... 56

SERVICING NOTE

1) When repairing this device with the power on, if you remove the main board or open the upper panel assy, this device stops working. In this case, you can work without the device stopping by fastening the hook of the DOOR OPEN switch (S801) with tape.

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

upper panel assy

MAIN board

tape

S801

2) This set is designed to perform automatic adjustment for each adjustment and write its value to EEPROM. Therefore, when EEPROM (IC801) has been replaced in service, be sure to perform automatic adjustment and write resultant values to the new EEPROM. Refer to page 12 for details.

– 3 –

SECTION 1

GENERAL

This section is extracted from instruction manual.

– 4 –

SECTION 2

888

Ver ‚.8‚

All ON

All OFF

Microprocessor version display

SELF-DIAGNOSTIC

2-1. GENERAL

This set uses the self-diagnostic system in which if an error occurs in playback/recording mode, the error is detected by the model control and power control blocks of the microprocessor and information on the cause is stored as history in EEPROM. By viewing this history in test mode, it helps you to analyze a fault and determine its location.

2-2. TEST MODE SETTING

There are two different methods to set the test mode: 1 Short BP801 (TEST) on the main board with a solder bridge

(connect pin @§ of IC801 to the ground). Then, turn on the power.

–

main board

IC503

IC509

(side B)

–

IC802

BP801

R818

C309

2) Remote controller LCD

• Holding down P allows the current display to be maintained while it being depressed.

2-4. RELEASING THE TEST MODE

For test mode set with the method 1: Turn off the power and open the solder bridge on BP801 on the main board. For test mode set with the method 2: Turn off the power.

2-5. SELF-DIAGNOSTIC MODE

1. Go into the test mode.

2. With the unit LCD indicators all flashing, press DISPLA Y key

to go into the self-diagnostic mode.

2 In the normal mode, use the keys on the unit to perform the

following operations: Press and hold down ( and press the keys below in this turn:

+ n + n =n = n + n = n + n = n P n P

2-3. OPERATION IN TEST MODE SETTING

When the test mode is set, the LCD shows repeated cycles of the following display:

1) Unit LCD

All ON

188:88

All OFF

Ver ‚‚.8‚

Microprocessor version display

History code Error indication code

1st ‚ ‚‚

3. Then, eac h time ) ke y is pressed, the reference information

display changes as given below.

1st ‚ XX

1st 1 ‚‚

1st 2 ‚‚

N ‚ XX

N 1 ‚‚

N 2 ‚‚

N-1 ‚ XX

N-1 1 ‚‚

N-1 2 ‚‚

N-2 ‚ XX

N-2 1 ‚‚

N-2 2 ‚‚

REC XXXX

1st ‚ XX

• Press = key to go back to the previous display.

(return)

– 5 –

• Description of History Codes History code number Description

1st 0 The first error 1st 1 1st 2 N 0 The last error N1 N2 N-1 0 One error before the last. N-1 1 N-1 2 N-2 0 Two errors before the last. N-2 1 N-2 2 REC Total recording time *1)

• Description of Error Indication Codes

Problem Indication code Meaning of code Description

No error 00

Abnormal stop

during recording

Abnormal stop

during playback

Abnormal stop of

recording/playback

caused by power

system

00 indicated

01 Servo error Focus out of alignment.

02 ADIP read error Unable to read the ADIP address. 03 Shock detected during write Jumped by 1.5 tracks or more due to shock during write.

04 11 No focus applied Focus could not be applied.

12 CRC error Unable to read the address. 15 FG error Abnormal rotation of disc. 21 Lower voltage due to overload Power voltage reduced due to overload. 22 Momentary interruption Momentary interruption detected.

23 24 Low power voltage in DSP

Shock detected during laser down

Lower power voltage in motor Power voltage for motor continuously reduced to less than system 1V.

*1) Total recording time Total recording time is recorded in minutes as an index for load to the OP. It is recorded in hexadecimal format and up to 65,535 min. (about 886 discs of 74-minute disc) can be counted. It returns to “0000h” when recorder goes beyond this limit. Example :REC 000A n Approx. 10 min.

REC 00A0 n Approx. 160 min. REC 0A00 n Approx. 2560 min.

Abnormal disc RPM.

Attempt to access an abnormal address.

Shock detected when laser was moving down.

2-6. CLEARING THE ERROR INDICATION CODE

AND TO TAL RECORDING TIME

After repair, reset the error indication code. Reset the total recording time when you have replaced the OP.

1. Go into the self-diagnostic mode. (See page 5.)

2. To reset the error indication code, slide REC c key when

the code is displayed. (All data including 1st, N , N-1 and N-2 are reset.)

3. T o reset the total recording time, slide REC c key when the

time is displayed.

– 6 –

SECTION 3

DISASSEMBLY

Note : This set can be disassemble according to the following sequence.

Bottom

Connector Panel assy

Note : Follow the disassembly procedure in the n umerical order given.

3-1. BOTTOM PANEL ASSY

Note) When installing, fit the each positions knobs with switches.

precision pan screws (M1.4)

Main Board

Upper Panel Block assy

LCD Block assy Ornametal Belt

Block assy

bottom panel assy

Main Board

Chassis (Main) assy

knobs

OP Block assy

Holder ass

3-2. CONNECTOR

precision pan screw (M1.4)

switches

CN601

CN502

precision pan screws (M1.4)

CN801

– 7 –

3-3. UPPER PANEL BLOCK ASSY

precision pan screw (M1.4)

precision pan screws (M1.4)

upper panel block assy

step screw (click arm)

click arm assy

3-4. LCD BLOCK ASSY

LCD block assy

precision pan screw (M1.4)

tapping screws (1.7)

claws

– 8 –

3-5. ORNAMENTAL BELT BLOCK ASSY

ornamental belt block assy

button (OPEN)

3-6. MAIN BOARD

toothed lock screw (M1.4)

step screw (HP)

CN501

toothed lock screws (M1.4)

precision pan screw (M1.4)

MAIN board

– 9 –

3-7. CHASSIS (MAIN) ASSY

step screw (MD)

chassis (MAIN) assy

3-8. OP BLOCK ASSY

over head block assy

flexible board

M1.4x3.0

lens

OP block assy

main shaft

– 10 –

3-9. HOLDER ASSY

claw

holder assy

– 11 –

SECTION 4

TEST MODE

4-1. GENERAL

This set provides the Overall adjustment mode (Assy mode) that allows CD and MO disk to be automatically adjusted when in the test mode. In this Assy mode, the system discriminates between CD and MO disk and then automatically perform adjustments for them in sequence. If a fault is found, the system displays its location. Also, the Serv o mode allows each indi vidual adjustment to be automatically adjusted.

4-2. TEST MODE SETTING

See page 5.

4-3. TEST MODE STRUCTURE

Test mode

or VOLUME key

Manual Mode

VOLUME key

Servo Mode

Audio Mode Mechanism Mode

Power Mode

or VOLUME key

–

Overall Adjustment Mode (Assy Mode)

MODE key

Hybrid Mode (ALL Mode)

EDIT/ENTER key

Key Check Mode

4-4. MANUAL MODE

(1) Servo Mode

• How to Transfer in the Servo Mode:

Mode No. Test Description Check Write

000 Servo mode 010 Offset correction value indication 011 VC offset correction 012 Focus bias correction 013 FE offset correction 014 ABCD offset correction 015 All servo ON 016 Temperature indication 020 Laser power adjustment 021 Laser CD/MO read adjustment ® (08) 022 Laser MO write adjustment ® (4C) 023 Sled normal ® (45) 024 Sled intermittent ® (65) 025 Sled access ® (30) 030 MO test adjustment 031 MO focus search adjustment 032 MO read FE balance adjustment ® (0F) 033 MO read ABCD level ® (07) 034 MO write FE balance adjustment ® (10) 035 MO write ABCD level ® (18) 036 Laser MO read adjustment ® (08) 037 MO focus gain ® (30) 038 MO tracking gain ® (30) 039 MO focus bias ®® (06) 040 Low reflection CD test adjustment 041

Low reflection CD focus search adjustment

042

Low reflection CD FE balance adjustment 043 Low reflection CD ABCD level ® (06) 044 Laser low reflection CD read ® (08) 045 Low reflection CD focus gain ® (30) 046 Low reflection CD tracking gain ® (30)

® (10)

Mode No. Test Description Check Write

047 Low reflection CD focus bias ®® (00) 050 CD test adjustment 051 CD focus search adjustment 052 CD FE balance adjustment ® (10) 053 CD ABCD level adjustment ® (15) 054 Laser CD read ® (08) 055 CD focus gain ® (30) 056 CD tracking gain ® (30) 057 CD focus bias ®® (00) 060 Recording test 061 32 cluster full recording 062 Recording shock 063 32 cluster full playback

Check : Mode to display error rate and cluster. Write : Mode to permit adjustment (Default value given in paren

theses).

1. Go into the test mode.

2. Press + or VOLUME + key to set the servo mode.

Unit LCD display

SERVO

XX XX

Adjustment value (the data can be changed/ written when flashing.)

Mode No. (The lower two digits are indicated. Three digits are indicated on the remote controller LCD.)

3. Press the keys below to change the mode No.

( : Increases the one place. p : Sets the one place to 0.

This key brings the ten place to 0 if the one place is

VOLUME + :Increases the ten place by 10 if the one place is 0.

Increases the adjustment value if the one place is non-zero.

VOLUME – : Decreases the ten place by 10 if the one place is 0.

Decreases the adjustment value if the one place is non-zero.

• How to Adjust in Servo Mode:

1. When the servo mode is set to the appropriate mode for each adjustment, the lower tow digits of the mode No. and the value stored in EEPROM are displayed and flashing.

SERVO

XX XX

Adjustment value (flashing) Mode No. (lower two digits)

– 12 –

2. To perform automatic adjustment for an adjustment item with the mode number 030 to 047, press P key. If the result of adjustment is OK, the adjustment value changes from flashing to steady on and it is automatically written to EEPROM.

AUTO ADJ

32 OF

Adjustment value (flashing to steady on)

3. To perform manual adjustment, change the adjustment v alue with VOLUME + or – key, and press P key to write it to EEPROM.

Note) Normally, automatic adjustment should be performed. Do

not execute manual adjustment.

• System Gain Mode

1. This mode allows the system gain to be freely adjusted. Press DISPLAY key to enter this mode.

SYS_GAIN

32 OF

Adjustment value (flashing)

2. Increase or decrease the adjustment value with V OLUME + or – key.

3. Press DISPLAY or p key to return to the normal mode.

4. For the error rate display enabled:

Normal Mode

Error rate display

System gain Mode

Press DISPLAY key

Cluster value AT error rate

BLOCK error rate

000 4F FF

39 OA

Adjustment value (flashing) Mode No. (lower two digits)

Note) In normal service, do not adjust the system gain mode.

(2) Audio Mode

• How to Transfer in the Audio Mode

Mode No. Test Description Write

100 Audio mode 110 Audio playback 111 L/R=1 kHz 0 dB Playback VOL HP output 112 L=1 kHz 0 dB Playback VOL HP output 113 R=1 kHz 0 dB Playback VOL HP output 114 L/R – ∞ dB Playback VOL HP output 120 Audio recording test 121 LINE manual recording

*1) MIC manual recording

122

123 LINE automatic recording

124

130 DIGITAL A GC ADJ1 131 MIC UP SR ® (30) 132 MIC DOWN SR ® (FA) 133 MIC THD0 ® (D0) 134 MIC GAIN ® (00) 135 MIC ATTACK ® (A0) 136 MIC RECOVER ® (F8) 137 MIC THD2 ® (F0) 138 MIC GAIN2 ® (D0) 139 MIC RTIME ® (01) 140 DIGITAL A GC ADJ2 141 LINE UP SR ® (17) 142 LINE DOWN SR ® (FF) 143 LINE THD0 ® (D0) 144 LINE GAIN ® (0C) 145 LINE ATTACK ® (33) 146 LINE RECOVER ® (F8) 147 LINE THD2 ® (E4) 148 LINE GAIN2 ® (5F) 149 LINE RTIME ® (04) 150 DIGITAL A GC ADJ3 151 MAN UP SR ® (C0) 152 MAN DOWN SR ® (40) 153 AUTO THD3 ® (51) 154 AUTO LMT UP SR ® (FF) 155 AUTO LMT DOWN SR ® (E0) 156 MAN THD3 ® (51) 157 MANU LMT UP SR ® (FF) 158 MANU LMT DOWN SR ® (A0) 159 THD1 ® (1A)

DEMP LINE manual recording

*1) DEMP MIC manual recording

*1) OPT automatic recording HP VOL HP output

MIC automatic recording DEMP LINE automatic recording

*1)

DEMP OPT automatic recording DEMP MIC automatic recording

Recording VOL HP output

HP VOL HP output

Change

Description

*1) The port is detected and the input is automatically selected.

Contents changed : Contents to be changed when VOLUME

+ or – key is pressed.

Write : Mode to permit adjustment

(Default value given in parentheses)

1. Go into the test mode.

2. Press + key or VOLUME + key and VOLUME + key in this turn to set the audio mode.

– 13 –

Unit LCD display

)

AUDIO

XX XX

Adjustment value (the data can be changed/ written when flashing.)

Mode No. (The lower two digits are indicated. Three digits are indicated on the remote controller LCD.

3. Press the keys below to change the mode number.

( : Increases the one place. p : Sets the one place to 0.

This key brings the ten place to 0 if the one place is 0.

VOLUME + : Increases the ten place by 10 if the one place is 0.

Increases the adjustment value if the one place is non-zero.

VOLUME – : Decreases the ten place by 10 if the one place is 0.

Decreases the adjustment value if the one place is non-zero.

(3) Mechanism Mode

• How to Transfer the Mode in the Mechanism Mode: Mode No. Test Description Operation

200 FUNCTION Stepper control 210 MECHA test Initial position return 211 HEAD adjustment Operation variation changing (19) 212 REC position Recording head descent 220 CLOCK Clock 221 CLOCK check Clock check/initialization

( ) : Default value

1. Go into the test mode.

2. Press + or V OLUME + and VOLUME + and VOLUME

+ in this turn to set the mechanism mode.

Unit LCD display

MECHA

XX XX

Adjustment value Mode No.

(Lower two di

3. Press the keys below to change the mode No.

its are displayed.)

• How to Adjust in the Audio Mode

1. When the audio mode is set to the appropriate mode for each adjustment, the lower tow digits of the mode No. and the value stored in EEPROM are displayed and flashing.

2. Change the adjustment value with VOLUME + or – key and press P key to write the new value to EEPROM.

• How to Check in the Audio Mode

The audio mode allows the checks below to be performed:

1. For the mode numbers of 100 and 110 to 114, pressing P key will activate a beep. (No beep sounds when c HOLD switch is put on.)

2. For the mode numbers of 121 to 124, pressing DIGIT AL MEGA BASS key will display the DBB mode for the adjustment v alue.

1 : Mode 1 2 : Mode 2

13 : OFF (This will not be accepted when the LINE OUT jack is plugged. The display will be 13 : OFF when LINE OUT jack is plugged in Modes 1 and 2.)

3. For the mode numbers of 120 to 124, REC LED goes on. (The LED does not go on when SYNCHRO REC switch is put on.)

( : Increases the one place. p : Sets the one place to 0.

This key brings the ten place to 0 if the one place is

VOLUME + : Increases the ten place by 10 if the one place is 0.

Increases the adjustment value if the one place is non-zero.

VOLUME – : Decreases the ten place by 10 if the one place is 0.

Decreases the adjustment value if the one place is non-zero.

• How to Check in the Mechanism Mode

The mechanism mode allows the checks below to be performed:

1. For the mode numbers of 200, 210 to 212, 220 and 221, pressing = key will move the optical pickup to the inner radius. Pressing + key will move the pickup to the outer radius.

2. For the mode numbers of 211 and 212, pressing P key will start aging. Pressing p key will stop aging.

• Mode No. 211 ... Sled aging with stepper at playback position.

• Mode No. 212 ... Sled aging with stepper at recording position.

3. With the mode number 210 selected, pr essing P k ey will start aging with steeper at between home and recording positions. p key will stop aging.

– 14 –

• Clock Operation Check

CDmode NG

55 7F

Result of adjustment NG mode No. (lower two digits)

1. For the mode No. of 221, operation check is performed. It is determined as OK if at 11 years, 11 months, 11 days, 11 hours, 11 minutes and 11 seconds or not the default value.

2. For the mode No. of 221, pressing P key will clear the resume data stored in EEPROM and initialize the clock data.

4-5. O VERALL ADJUSTMENT MODE (ASSY MODE)

• How to Adjust in Assy Mode

1. Go into the test mode.

2. Press = or VOLUME – key.

Note) The clock should be set when the overall adjustment mode

is completed as OK. The write data is to be at 11 years, November 11 days, 11 hours, 11 minutes and 11 seconds.

(4) Power Mode

Mode No. Test Description Indication value Remark

300 POWER test 310 POWER SUPPLY 311 DC IN +B voltage value 312 DC IN + Ni-Cd +B voltage value 313 Ni or AM3 +B voltage value 314 AM3 +B voltage value 320 CHG TEST 321 Charging start

1. Go into the test mode.

2. Press + key or VOLUME + and VOLUME + and VOLUME + and VOLUME + in this turn to set the power mode.

POWER

XX XX

Adjustment value

Mode No. (Lower two digits are displayed.)

Assy Mode

3. Insert the test CD (TDYS-1) or an available SONY CD.

4. Press ( key . The system discr iminates between CD and MO and performs automatic adjustment for CD.

CD RUN

Mode No. under adjustmen

• CD Automatic Adjustment

Mode No. Adjustment Description

052 CD FE balance adjustment 053 CD ABCD level adjustment 055 CD focus gain 056 CD tracking gain 057 CD focus bias

5. If the result of automatic adjustment is OK, the following display appears:

3. Press the keys below to change the mode No.

( : Increases the one place. p : Sets the one place to 0.

This key brings the ten place to 0 if the one place is

VOLUME + : Increases the ten place by 10 if the one place is 0.

Increases the adjustment value if the one place is non-zero.

VOLUME – : Decreases the ten place by 10 if the one place is 0.

Decreases the adjustment value if the one place is non-zero.

Note) With the mode number 310 selected, pressing ( key will

transfer to the mode number (311 to 314) for the currently operating power. With the mode number 300 selected, pressing P key will set the sleep mode. Pressing p key will release it.

• How to Check in the Power Mode

1. For the mode numbers of 311 to 314, the voltage of the currently operating power is displayed.

CDmode OK

6. If the result of automatic adjustment is NG, the following display appears:

– 15 –

+ 33 hidden pages