Aiwa LCX-MD211 Service Manual

LCX-MD211

SERVICE MANUAL

MD / CD

STEREO SYSTEM

SYSTEM SPEAKER

LCX–MD211

• This Service Manual contains the additional information “TEST MODE”, “ADJUSTMENT”, “IC BLOCK DIAGRAM”, “IC DESCRIPTION”, “LCD DISPLAY” and “VOLTAGE” for the model LCX-MD211(EZ). If requiring the other information, see Service Manual of LCX-MD211(EZ), (S/M code No.09-007-429-4R2).

SX-MD210

BASIC TAPE MECHANISM : TN-21ZSC-2003 BASIC CD MECHANISM : DA11T3C BASIC MD MECHANISM : AZG-4 A

REMOTE

CONTROLLER

RC-AAT11

S/M Code No. 09-00B-429-4S2

SUPPLEMENT

DATA

TEST MODE

CD TEST MODE

1-1 How to activate CD Test Mode

Insert the AC plug while pressing the "CD function" button. Test mode will be activated and [CD TEST] will be appeared in the LCD display.

Note: Test mode can not be activated when CD door switch is opened.

1-2 CD Test Mode Functions

Mode

Start Mode

Search Mode

Play Mode PLAY

Traverse Mode TRAVERS

Sled Mode

* Note 1: There are cases when CD cannot be operated owing to the protection circuit being operated when heat builds up in the driver IC if the

focus search is operated continually for more than 10 minutes. In this case, the power supply should be switched off for ten minutes until heat has been reduced and then re-start.

1-3 How to cancel CD Test Mode

Either one of the following operations will cancel the CD test mode.

• Open the CD door switch.

• Press "POWER" button.

• Disconnect the AC plug.

Function

Activate CD

Test Mode

Tuner Function

Button

g f

Display

CD TEST

SLED IN

SLED OUT

Operation Content

•

Continuous Focus Search (Pickup lens repeat full swing) * Note 1

• Normal Playback

When TOC READ is unavailable,

•

continuous Focus Search (Same as Search Mode Operation)

Playback pause status Tracking servo OFF

Shift to the internal circumference of

•

pickup

• Shft to the external circumference of pickup

APC circuit check Laser current measurement

•

Focus error waveform check

•

Focus servo Tracking servo

•

CLV servo

•

Sled servo

•

Sled servo Mecha operation check

•

LCD TEST MODE

1-1 How to activate LCD Test Mode

Insert the AC plug while pressing the "DISPLAY" button. LCD display is fully illuminated and then all segments are lit on and off every one second.

1-2 How to cancel LCD Test Mode

LCD test mode will cancel by press "POWER" button or disconnect the plug.

– 2 –

MD TEST MODE

1-1 How to start up MD Test Mode

Insert the AC plug while pressing the "MD function" button. After the MD test mode has started up, [MD TEST] message appears and the test mode becomes operatable.

Note: • Disconnect the AC plug immediately if any mechanism abnormalities.

• Playback and recording are not possible during the test mode.

1-2 How to cancel MD Test Mode

1) Press the "MD EJECT" button and remove the disc.

2) Disconnect the AC plug or press "POWER" button.

1-3 Operation Check Mode

1) Checks after the test mode has started up. The following playback audio circuits can be checked.

• Enable circuit to check ------------ DAC, LINEAMP, HEADPHONE AMP

• Output level ------------------------- 1KHz, -24dB

2) Switch status check ON/OFF statuses of main unit and mechanism switches can be checked on display.

Switch name Indication on Display Usalde disc

REC PROTECT

REFRECT

INNER

1-4 How to switch to Servo Standby Mode

When the test mode has been established, the mode changes to the servo standby mode by pressing "s" button (lndication on display : ALL SVOFF). The various check modes can be entered from this mode. Pressing the "s" button during each operation returns to [ALL SVOFF].

1-5 Checking Sled Operation

1) When "g" button is pressed in the [ALL SVOFF] state, pickup moves in the outer direction. [T SLEDFWD] is displayed.

2) When "g" button is pressed in the [ALL SVOFF] state, pickup moves in the inner direction. [T SLEDRVS] is displayed.

1-6 Checking Laser Power

1) The laser power is switched each time the "EDIT" button is pressed in the "ALL SVOFF" state. Laser power output is changed as OFF

bLASER READbLASER 1/2bLASER WRITEbOFF order and indication on the display is follows;

When the write-protection tab of disc is stopped.

When the high reflection disc (CD) is used.

When the pickup is the positioned at the innermost track (when the LIMIT SW is ON).

Switch state

TOC – EDIT

MD REC

MONO

Record/playback disc

Playback only disc

Mode

OFF

LASER READ

LASER 1/2 WRITE

LASER WRITE

2) Press "s" button to return the display to [ALL SVOFF] after checking.

1-7 Checking OWH (Over Write Head) Operation

The operation of OWH can be checked by pressing following buttons in the loading status. "MD EJECT" button-----------------------OWH UP "SYNCHRO REC" button----------------OWH DOWN * Note: Do not down OWH when using the high reflection disc (CD).

1-8 Checking Servo Operation

• Checking the focus search and spindle kick 1

1) When "E" button is pressed in the [ALL SVOFF] state without disc, focus search and spindle kick are executed continuously. [ FOCUS SCH] is displayed.

Indication on display

ALL SVOFF

LA READ

LA 1/2

LA WRITE

– 3 –

2) Press "s" button to display [ALL SVOFF] after checking

• Checking the focus search and spendle kick 2

1) When "TUNER function" button is pressed in the "ALL SVOFF" state regardless disc existence, focus search and spindle kick are executed continuously. [FOCUS CHK] is displayed and S curve can be checked if disc is loaded.

2) Press "s" button to display [ALL SVOFF] after checking.

• Checking Focus Servo

1) Insert a test disc.

2) Move pickup to center track by pressing "g" or "f" buttons.

3) Press "JOG MODE" button to set the servo mode according to the inserted disc as follows;

• MO disc (MO)----------------Indication on display [SEL GRV].

• PIT disc (CD)-----------------Indication on display [SEL PIT].

4) Press "E" button. If focus servo is operating normally, the messge [FOCUS ON] is displayed after [FOCUS SCH].

5) Press "s" button to display [ALL SVOFF] after checking.

• Checking all Servos are turned on.

1) Tracking and sled servos and turned on and all servos work when "ENTER" button is pressed in the [FOCUS ON!] state. [ALL SV ON] is displayed if all servos are normal.

2) Press "s" button to display [ALL SVOFF] after checking.

– 4 –

ADJUSTMENT <TUNER / DECK>

MAIN C.B

L771

IC771

TP5

J201

L772

2826

TP6

FFE801

L942

TC942

TP7(Rch)

C785

C786

TP8(Lch)

IC201

IC202

TP4 (VT)

L981

IC721

L941

< TUNER SECTION >

1. MW VT Check Settings : • Test point : TP4 (VT) Method : Set to MW 1602kHz and check that the test point is

less than 5.6V.

2. MW Tracking Adjustment Settings : • Test point : TP7 (RCH), TP8 (LCH)

• Adjustment location : L981

Method : Set to MW 999kHz and adjust L981so that the test

point becomes maximum.

3. AM IF Adjustment Settings : • Test point : TP7 (RCH), TP8 (LCH)

• Adjustment location:

L772 .................................................... 450kHz

4. LW VT Adjustment Settings : • Test point : TP4 (VT)

• Adjustment location : L942

Method : Set to LW 153kHz and adjust L942 so that the test

point becomes 1.3V ± 0.05V.

5. LW Tracking Adjustment Settings : • Test point : TP7 (RCH), TP8 (LCH)

• Adjustment location :

L941 .................................................... 153kHz

TC942 .................................................. 285kHz

Method : Set up TC942 to center before adjustment. The level at

153kHz is adjusted to maxinum by L941. Then the level at 285kHz is adjusted to maxinum by TC942.

6. FM VT Check Settings : • Test point : TP4 (VT) Method : Set to FM 108MHz and check that the test point is less

than 8.2V .Then set to FM 87.5MHz and check that the test poit is more than 1.5V.

7. FM Tracking Check Settings : • Test point : TP7 (RCH), TP8 (LCH) Method : Set to FM 98MHz and check that the test point is less

than 18dB.

8. DC Balance / Mono Distortion Adjustment Settings : • Test point : TP5, TP6 (DC balance)

TP7 (RCH), TP8(LCH)(Distortion)

• Adjustment location : L771

• Input level : 54dB

Method : Set to FM 98MHz and adjust L771 so that the voltage

between TP3 and TP4 becomes 0V ± 0.04V. Next, check that the distortion is less than 1.5%.

9. FM Separation Check Settings : • Test point : PHONE JACK (J201)

• Input level : 54dB

Method : Set to FM 98MHz and check that the test point is more

than 20dB.

< DECK SECTION >

10. Head Azimuth Adjustment Settings : • Test tape : TTA–330

• Test point : PHONE JACK (J201)

• Adjustment location : Head azimuth adjustment screw

Method : 1) Connect the L positive terminal to CH1 probe

(positive side) of oscilloscope and L negative terminal to CH1 probe (negative side). Connect the R positive and negative terminals to CH2 probe same condition as CH1 probe.

2) Play back the 10kHz signal of the test tape.

3) Adjust the head azimuth adjustment screw to

become maximum waveform in the oscilloscope and same phase for CH1 and CH2.

– 5 –

<CD>

CD C.B

CN401

SFR430

TP (VREF)

C431

TP(TE)

R405

IC401

Note: • Connect a provbe (10 : 1) of the oscilloscope to adjust.

• Connect negative side of the oscilloscope to TP (VREF) for each adjustment.

1. Focus Bias Adjustment

Adjust focus bias when replaing or repairing the optical block.

TP(RFSM)

IC404

CN405

IC402

CN403

2. Tracking Balance Adjustment

Oscilloscope (DC range)

TP (RFSM)

TP (VREF)

1) Connect an oscilloscope to the test points TP (RFSM) and TP(VREF).

2) Turn on the "POWER" button.

3) Insert the test disc TCD-782 (YEDS-18) and playack the 2nd composition.

4) Adjust SFR430 so that RF signal of the test point is MAX and

CLEARREST.

EYE PATTERN must be CLEAR and MAX

Max

VOLT/DIV: 0.5V TIME/DIV: 0.5uS

TP (TE)

TP (VREF)

1) Connect an oscilloscope to the test point TP (TE) and

TP (VREF).

2) Active the CD test mode.

3) Insert the test disc TCD-782 (YEDS-18) and choose traverse

mode of CD test mode.

4) Check that the waveform of traverse is vertically symmetrical as

shown below.

5) Cancel CD test mode after checking.

VREF

A=B

VOLT/DIV: 20mV TIME/DIV: 1mS

– 6 –

<MD>

• Perform 1~3 adjustment when display showing [NO ADJUST].

1. Temperature Compensation Adjustment

• Test point: Check on the display.

• Tool : Thermometer

• Adjustment procedure

1) After MD test mode has started up, press "s" button to display [ALL SVOFF].

2) Press "DISPLAY" button to display [TEMP = ].

3) Press "T-BASS" button to display [T + ** C ± ##].

4) Put the thermometer near the MD mechanism to measure the room temperature.

5) Adjust the indication value ** using "l" and "j" buttons until the value is the same as room temperature. Press "ENTER" button after adjusting.

6) Ptess "s" button to display [ALL SVOFF] after adjusting.

7) After adjustment is completed, once again set the display to [TMP + ** C ± ##] and check the value that has been caluculated with the addition or subtraction of the numerical values of ## in relation to the ** value. This value is to be the same sa room temperature. NOTE: Do not perform this adjustment if it is not possible to measure the room temperature.

Then, confirm the values of [I ** E ] in the display are within the following range.

[ ** ] ......................... 04~0A

[ ] ......................... 09~15

5) Press "DISPLAY" button again. Confirm the values of [F ** T ## S II ] in the display are within the following range.

[**] ........................... 1A~45

[##] ........................... 00~03

[II ] ........................ 00~03

6) Press "s" button to display [ALL SVOFF].

Adjustment for PIT disc

1) Insert the TGYS-1 test disc.

2) Press "s" button to display [ALL SVOFF].

3) Press "JOG MODE" button to display [SEL PIT].

4) When pressing "MD function" button, [AUTO ADJ] is displayed and adjustment start. After adjusting, [DONE] is displayed. (If [failed] is displayed, the adjustment failed.)

5) Press "s" button to display [ALL SVOFF].

2. Laser Power Adjustment

• Test point: Pickup laser output

• Tool : Laser power meter

• Adjustment procedure

1) Starting in the [ALL SVOFF] status, press "EDIT" button three times to change the display to [LA WRITE].

2) Press "T-BASS" button once and change the display to [LASER = **].

3) Measure the laser output of pickup with the laser power meter and adjust output by "g" or "f" buttons so that the measurement value becomes 6.8mW ± 0.03mW. Press "ENTER" button after adjusting.

4) Press "s" button to display [ALL SVOFF] after adjusting. Caution: There is a possibility that pickup may be damaged if laser output exceeds 7.0mW.

3.Auto Sequence Adjustment (EFB/IVR/FOCUS AGC/TRACKING

AGC adjustment)

• Test disc: MDW-60, TGYS-1

Adjustment MO disc

1) Insert the MDW-60 test disc.

2) Press "s" button to display [ALL SVOFF].

3) Press "JOG MODE" button to display [SEL GRV].

4) When pressing "MD function" button, [AUTO ADJ] is displayed and adjustment start. After adjusting, [DONE] is displayed. (If [FAILED] is displayed, the adjustment failed.)

5) Press "s" button to display [ALL SVOFF]. NOTE: 1.As there is a posibility that adjustment may not be

able to adequately performed if the disc is dirty or scratched, make sure to keep the disc clean.

2.When using a MO disc, one section will be erased in order to change it to WRITE POWER, so a special disc is to be used.

Checking for IVR, EFB and focus/tracking/sled gain of MO disc

1) Move the pickup to the center track using "g" or "f"

buttons.

2) Press "E" button to display [FOCUS ON].

3) Press "ENTER" button to switch the mode to [ALL SV ON].

4) Press "s" button and "DISPLAY" button twice.

Checking IVR, EFB and focus/tracking/sled gain of PIT disc Perform the same procedures as for MO disc and check that the display is within the range below;

[IVR]..............................14~19

[EFB]..............................09~15

[FOCUS GAIN].............1A~45

[Tracking gain]...............00~3F

[Sled gain]......................00~3F

4. Checking Error Rate (PIT disc)

1) Insert the TGYS-1 test disc.

2) Move the pickup to the center track using "g" or "f" buttons.

3) Press "JOG MODE" button to display [SEL PIT].

4) Press "E" button to display [FOCUS ON].

5) Press "ENTER" button to switch the mode to [AL SV ON]. Then press "DISPLAY" button twice to display [00 ** 000].

6) Check the value of ** is below [30] at this time.

7) Press "s" button to display [ALL SVOFF].

5. Checking Record/Playback Error Rate (MO disc)

1) Insert the MDW-60 test disc.

2) Move the pickup to the center track using "g" or "f" buttons.

3) Press "JOG MODE" button to display [SEL GRV].

4) Press "MD REC" button to display [R ANALOG].

5) Press "E" button to display [FOCUS ON].

6) After displaying [ALL SV ON] by pressing "ENTER" button, press "SYNCRO REC" button.

7) Recording begins after OWH has moved when "MD REC" button is pressed once again. At this time, display will change from [ALL SV ON] to [A0600C ## S].

8) Press "s" button after recording has progressed for about 15 seconds, changing the display to [ALL SVOFF].

9) Press "MD EJECT" button to raise the OWH.

10) Press "E" button to display [FOCUS ON].

11) Once [ALL SV ON] has been displayed by pressing "ENTER" button, press "DISPLAY" button to display [A After to display [00 // 000]. Check that the value of // is below than [20] at this time.

reaching 600, press "DISPLAY" button once again

****

C ## S].

– 7 –

+ 16 hidden pages

Aiwa LCX-MD211 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual