Aiwa LCX-MD211 Service Manual

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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 –

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

6. UTOC ERASE To be performed only when erasure is needed with disc that have already been recorded upon.

1) Insert the disc that is to be used to erase the UTOC.

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) Press "ENTER" button to display [ALL SV ON].

7) Press "MD REC" button for move than one second continuously, [UTOC ERASE] will be displayed and UTOC erased.

8) Once the UTOC has been erased, [ALL SVOFF] will be

displayed.

– 8 –

SERVICE JIG AND TOOLS

Service jigs and tools for repairing as follows;

CD mecha stand

PU extention FFC

LCD DISPLAY

GRID ASSIGNMENT

Usage

S.T.I. G-98-50

Parts Name Parts No

JIG, P-CD BY TORIKOSHI

FFC-CABLE, 16P 1.0 250mm

FFC, 8P-1.0

FFC, 14P-1.0

SV-J00-018-010

87-CE1-640-010

SV-J00-043-010

SV-J00-044-010

ANODE CONNECTION

oN 123456789 011121314151

1MOC------1MOCa1i1h1f1a2i2h21LOCa3i3h3

2MOC----2MOC--b1j1g1e1b2j2g2f2b3j3g3

3MOC--3MOC----c1k1n1d1c2k2n2e2c3k3n3

4MOC4MOC------1Pl1m1NOESDRl2m2d2"1"l3m3

oN617181910212223242526272829203

1MOCf3--a4i4h4f4a5i5h5f5a6i6h6f6a7

2MOCe32LOCb4j4g4e4b5j5g5e5b6j6g6e6b7

3MOCd3zHMc4k4n4d4c5k5n5d5c6k6n6d6c7

4MOCPRzHk--l4m4--3Pl5m5

MDNR

2Pl6m6MGRP

COT

TIDE

 9 

oN13233343536373839304142434

1MOCi7h7f7a8i8h8f8a9i9h9f91DM

2MOCj7g7e7b8j8g8e8b9j9g9e91T

3MOCk7n7d7c8k8n8d8c9k9n9d91DC2DC

4MOCl7m7

CER

ONOM

l8m8PEELSCERl9m9012DM

6D,3D

5D,2D

4D,1D

 10 

IC DESCRIPTION

IC, LC877264A-EZ

Pin No. Pin Name I/O Description

1 O-ARDY O Output ready signal for MD micro controller communication. L: Enable.

2 O-SREQ O Request system micro controller output for MD micro controller communication. L: Enable.

3 O-SOUT O Output serial data for MD micro controller communication.

4 I-SIN I Input serial data for MD micro controller communication.

5 I-ACLK I Input serial clock for MD micro controller communication.

6 I-MREQ I Request system micro controller output for MD micro-computer communication. L: Enable.

7 NC (SELECT) - Not used.

8 O-PCONT O Output system power control. H: ON.

9 I-HOLD I Detect Hold status. L: HOLD.

10 O-CLKSFT O Control clock shift. L: Shift.

11 I-RESET I Input reset.

12 XT1 I Not used (pull up in VDD).

13 XT2 - Not connected.

14 VSS1 - Power supply (-) terminal.

15 CF1 I Input terminal for ceramic oscillator (5.76MHz).

16 CF2 O Output terminal for ceramic oscillator (5.76MHz).

17 VDD1 - Power supply (+) terminal.

18 I-JOGA I Detect jog dial A.

19 I-JOGB I Detect jog dial B.

20 I-KEY1

21 I-KEY2

22 I-RDSIG I Input RDS signal level and AD.

23 I-CTON I Detect CT deck power. H: OFF, L: ON.

24 I-RDDT I Input RDS data.

25 I-COLOR I Input LCD back light initial setting.

26 I-TMBASE I Input reference frequency for 8Hz clock.

27 I-INIT I Input diode matrix initial setting.

28 I-RDCL I Input RDS clock.

29 I-RMC I Input received singnal for remote controller.

30 I-CTPLAY I Detect CT deck play. H: PLAY.

31 I-CTREC I Detect CT deck record. H: REC.

32 O-TUCONT O Control tuner power. H: ON.

33 O-TUCE O Output chip enable for tuner PLL communication.

I Detect tact key AD input.

34 O-TUDI O Output serial data for tuner PLL communication.

35 O-TUCL O Output clock for tuner PLL communication.

36 I-TUDO I Input serial data for tuner PLL communication.

37 I-STEREO I Detect receiving tuner stereo. H: MONO, L: STEREO.

38 NC - Not connected.

39~53 S9~S23 O Output LCD segment.

54 VDD2 - Power supply (+) terminal.

55 VCC2 - Power supply (-) terminal.

56~79 S24~S47 O Output LCD segment.

– 11 –

Pin No. Pin Name I/O Description

80 I-DOOR I Detect CD door. H: OPEN, L: CLOSE.

81 I-WRQ I Sub code Q read standby for CD LSI communication.

82 I-DRF I Input RF level detection.

83 COM0 O Output COM1.

84 COM1 O Output COM2.

85 COM2 O Output COM3.

86 COM3 O Output COM4.

87 O-CDCONT O Control CD power. H: ON.

88 I-SQOUT I Input sub code Q for CD LSI communication

89 VSS3 – Power supply (-) terminal.

90 VDD3 – Power supply (+) terminal.

91 O-RWC O Input/output switching control for CD LSI communication. H: Write, L: Read.

92 O-COIN O Output serial data for CD LSI communication.

93 O-CQCK O Output serial clock for CD LSI communication.

94 O-LIGHT1 O Output LCD back light control 1.

95 O-JOGLED O Indicate the JOG function status. L: Volume.

96 O-SCONTM O Control sound processor. H: H, M: H, L: L.

97 O-SCONTL O Control sound processor. H: H, M: L, L: L.

98 O-MUTE O Output audio signal mute. H: ON.

99 O-LIGHT2 O Output LCD back light cotrol 2.

100 O-SRST O Reset MD micro controller. L: Reset.

– 12 –

IC, LA9241ML

Pin No. Pin Name I/O Description

1 FIN2 I

2 FIN1 I Connect to the pickup's photo diode.

3 E I Connect to the pickup's photo diode; subtracting this pin from pin F generates TE signal.

4 F I Connect to the pickup's photo diode.

5 TB I Input for DC component of TE signal.

6 TE– I Connect to the resistor between this pin and TE pin for setting the gain of TE signal.

7 TE O Output for TE signal.

8 TESI I Input for TES (Track Error Sense) comparator, TE signal is band-passed and inputted.

9 SCI I Input for shock detection.

10 TH I For setting tracking gain time constant.

11 TA O TA amplifier output pin.

12 TD– I For constructing tracking phase compensation constant between TD and VR pins.

13 TD O For setting tracking phase compensation.

14 JP I For setting the amplifier of tracking jump signal (kick pulse).

15 TO O Output for tracking control signal.

16 FD O Output for focusing control signal.

17 FD– I For constructing focusing phase compensation constant between FD and FA pins.

Connect to the pickup's photo diode; adding this pin to pin FIN1 generates RF signal,

and subtracting it generates FE signal.

18 FA O For constructing focusing phase compensation constant between FD– and FA– pins.

19 FA– I For constructing focusing phase compensation constant between FA and FE pins.

20 FE O Output for FE signal.

21 FE– I Connect to the gain-setting resistor of FE signal between this pin and FE pin.

22 AGND – GND for analog signals.

23 SP O Single end output of CV+ and CV– pin input signal.

24 SPI I Input spindle amplifier.

25 SPG I Connect to the gain-setting resistor during spindle 12cm mode. (Not connected)

26 SP– I Connect to spindle phase compensation constant together with SPD pin.

27 SPD O Output for spindle control signal.

28 SLEQ I Connect to sled phase compensation constant.

29 SLD O Output for sled control signal.

30 SL–

31 SL+

32 JP–

33 JP+

34 TGL I Input for tracking gain control signal from DSP; gain is low if TGL = "H".

35 TOFF I Input for tracking off control signal from DSP; off if TOFF = "H".

I Input for sled-sending signal from microcontroller.

I Input for tracking jump signal from DSP.

36 TES O Output TES signal to DSP.

37 HFL O

38 SLOF I Input for sled servo off control.

HIGH FREQUENCY LEVEL; used to determine whether the main beam is on a pit or

on a mirror.

– 13 –

Pin No. Pin Name I/O Description

39 CV–

40 CV+

41 RFSM O Output for RF.

42 RFS– O For setting RF gain and 3T compensation constant together with RFSM.

I Input for CLV error signal from DSP.

43 SLC O

44 SLI I Input for controlling the data slice level of DSP.

45 DGND – GND for digital system.

46 FSC O Output pin for focus search smoothing capacitor.

47 TBC I (Tracking Balance Control) EF balance variable range setting pin.

48 NC – Not connected.

49 DEF O Output for disk defect detection.

50 CLK I Reference clock input; DSP's 4.23MHz is inputted.

51 CL I Clock input for micro controller command.

52 DAT I Data input for micro controller command.

53 CE I Chip-enable input for micro controller command.

54 DRF O Detect RF; output for RF level detection.

55 FSS I (Focus Search Mode) = search/+search against reference voltage switching pin. (Not connected)

56 VCC2 – VCC pin for servo and digital systems.

57 REFI – For connecting pass capacitor to reference voltage.

58 VR O Reference voltage output.

59 LF2 – For setting disk defect-detection time constant.

60 PHI – Connect to capacitor for RF signal peak hold.

SLICE LEVEL CONTROL; output for controlling the data slice level of DSP with

RF waveform.

61 BHI – Connect to capacitor for RF signal bottom hold.

62 LDD O Output for APC circuit.

63 LDS I Input for APC circuit.

64 VCC1 – VCC pin for RF system.

– 14 –

IC, LC78622ED

Pin No. Pin Name I/O Description

1 DEFI I Defect detection signal (DEF) input.

2 TAI I Test input. A pull-down resistor is built in. (Must be connected to 0V)

3 PDO O External VCO control phase comparator output.

4 VVSS – Internal VCO ground. (Must be connected to 0V)

5 ISET I PDO output current adjustment resistor connection.

6 VVDD – Internal VCO power supply.

7 FR I VCO frequency range adjustment.

8 VSS – Digital system ground. (Must be connected to 0V)

9 EFMO O Slice level control; EFM signal output.

10 EFMIN I Slice level control; EFM signal input.

11 T2 I Test input. A pull-down resistor is built in. (Must be connected to 0V)

12 CLV+

13 CLV–

14 V/P O Rough servo/phase control automatic switching monitor output. H: Rough servo, L:phase servo.

15 HFL I Track detection signal input. This is a Schmitt input.

16 TES I Tracking error signal input. This is a Schmitt input.

Disc motor control output.

Three-value ouput is also possible when specified by microprocessor command.

17 TOFF O Tracking off output.

18 TGL O Tracking gain switching output. Increase the gain when low.

19 JP+ O Track jump output.

20 JP– Three-value output is also possible when specified by microprocessor command.

21 PCK O

22 FSEQ O detected from the EFM signal and the internally generated synchronization signal agree.

23 VDD – Digital system power supply.

24 SL+ O Sled advance + signal output.

25 SL– O Sled advance - signal output.

26 NC – Not connected.

27 PU IN I CD pickup inside limit switch. When inside limit input "L", when CD-RW output "H".

28 RW O Gain control.

29 EMPH O De-emphasis monitor pin. De-emphasis disc is being played back at H. (Not connected)

30 C2F O C2 flag output. (Not connected)

31 DOUT O Digital output (EIAJ format).

32 T3

I Test input. A pull-down resistor is built in. (Must be connected to 0V)

33 T4

EFM data playback clock monitor. Outputs 4.3218 MHz when the phase is locked.

(Not connected)

Synchronization signal detection ouput. Outputs a high level when the synchronization signal

(Not connected)

34 NC – Not connected.

35 MUTEL O Left channel one-bit DAC L channel mute output. (Not connected)

36 LVDD – Left channel one-bit DAC L channel power supply.

37 LCHO O Left channel one-bit DAC L channel output.

38 LVSS – Left channel one-bit DAC L channel ground. (Must be connected to 0V)

– 15 –

Pin No. Pin Name I/O Description

39 RVSS – Right channel one-bit DAC R channel ground. (Must be connected to 0V)

40 RCHO O Right channel one-bit DAC R channel output.

41 RVDD – Right channel one-bit DAC R channel power supply.

42 MUTER O Right channel one-bit DAC R channel mute ouput. (Not connected)

43 XVDD – Crystal oscillator power supply.

44 XOUT O

45 XIN I

46 XVSS – Crystal oscillator ground. (Must be connected to 0V)

47 SBSY O Subcode block synchronization signal output. (Not connected)

48 EFLG O C1, C2 single and double error correction monitor pin. (Must be connected to 0V)

49 PW O Subcode P, Q, R, S, T, U, V and W output. (Not connected)

Connection for a 16.934MHz crystal oscillator element.

50 SFSY O

51 SBCK I Subcode readout clock input. This is a Schmitt input. (Must be connected to 0V)

52 FSX O

53 WRQ O Subcode Q output standby output.

54 RWC I Read/write control input. This is a Schmitt input.

55 SQOUT O Subcode Q output.

56 COIN I Command input from the control microprocessor.

57 CQCK I

58 RES I Reset pin. This pin must be set low briefly after power is first applied.

59 T11 O Test output. Leave open. (Normally outputs a low level). (Not connected)

60 16M O 16.9344 MHz output. (Not connected)

61 4.2M O 4.2336 MHz output.

62 T5 I Test input. A pull-down resistor is built in. (Must be connected to 0V)

63 CS I Chip select input. A pull-down resistor is built in. (Must be connected to 0V)

64 T1 I Test input. No pull-down resistor. (Must be connected to 0V)

Subcode frame synchronization signal output. This signal falls when the subcode are in the

standby state. (Not connected)

Output for the 7.35 kHz synchronization signal divided from the crystal oscillator.

(Not connected)

Command input read clock or subcode readout input clock from SQOUT pin.

This is a Schmit input

– 16 –

IC, LC72131D

Pin No. Pin Name I/O Description

1 X IN I A crystal oscillator (4.5MHz) is connected to X OUT pin.

2 NC – Not connected.

3 CE I To enable the IC. Active "H".

4DII

5 CL I To clock in the data DI.

6 DO O Digital data output to CPU (LC877264A-EZ).

7 T-BASE O Output a reference clock signal (8Hz) for the clock.

8 MONO / BEAT O Output "L" when MONO / BEAT is switched.

9 FM / SW O

10 MW / SW O

11 IF-MUTE O To control internal counter.

12 IF-IN I General purpose counter input.

13 TUNE I Receives "L" when station is tuned.

14 NC – Not connected.

15 AMIN I Receives the AM local oscillator frequency signal.

Digital data input from CPU (LC877264A-EZ) when relevant key is operated.

Active "H".

Output "L" or "H" as follows:

2 BAND 3 BAND

AM FM LW MW FM

HLHHL

Output "L" or "H" as follows:

2 BAND 3 BAND

AM FM LW MW FM

LLHLL

16 FMIN I Receives the FM local oscillator frequency signal.

17 VDD – Supply power to IC (+5V).

18 PD O PLL charge pump output.

19 AIN I

20 AOUT O

21 VSS – Ground.

22 X OUT O A crystal oscillator (4.5MHz) is connected to X IN pin.

The MOS transistor used for PLL active low pass filter.

– 17 –

IC BLOCK DIAGRAM

- 18 -

- 19 -

VOLTAGE CHART

< CD > Test condition : CD play

IC401(LA9241ML)

IC402(LC78622ED)

1 2.5

2 2.5

3 2.5

4 2.5

5 2.5

6 2.5

7 2.5

8 2.5

9 2.5

10 2.5

11 2.5

12 2.5

13 2.4

14 2.5

15 2.5

16 2.5

17 2.5

18 2.5

41 2.3

42 2.4

43 2.6

44 2.5

45 0

46 2.5

47 2.5

48 0

49 0

50 2.5

51 4.3

52 5.1

53 0

54 4.8

55 0

56 5.0

57 2.5

58 2.5

3 1.5

5 1.9

6 5.0

7 0.3

9 2.5

10 2.6

11 0

12 0.2

13 0

14 0

15 0

16 1.6

17 0

18 5.0

41 4.8

42 0

43 5.0

44 2.1

45 2.1

46 0

47 0.1

48 0

49 0.1

50 2.5

51 0

52 2.5

53 1.6

54 0

55 0.3

56 5.1

57 4.3

58 5.0

19 2.5

20 2.5

21 2.5

22 0

23 2.5

24 2.5

25 2.5

26 2.5

27 2.6

28 2.5

29 2.6

30 2.3

31 2.3

32 0

33 0

34 5.0

35 0

36 1.6

59 2.4

60 2.4

61 2.2

62 3.7

63 0.2

645.0

19 0

20 0

21 2.5

22 5.0

23 5.0

24 0

25 0

26 5.0

27 5.0

28 0

29 0

30 0

31 2.4

32 0

33 0

34 0

35 0

36 4.8

59 0

60 2.5

61 2.4

62 0

63 0

64 0

37 0

38 0

39 0

40 0.2

37 2.1

38 0

39 0

40 2.1

 20 

< CD >

IC403(LA6541D)

< TUNER > Test condition : Tuner function

IC721(LC72131D)

IC771(LA1837N)

1 7.8

2 5.0

4 2.5

5 3.5

6 3.5

10 3.5

11 3.5

12 2.5

13 2.5

14 5.0

15 7.1

16 5.0

17 4.9

18 2.5

AM FM

1 2.6 2.5

200

300

400

500

6 5.2 2.4

7 2.5 2.5

8 0 8.0

9 8.0 0

10 0 0

11 0 0

12 0 0

13 7.9 2.5

14 0 0

15 2.6 0

16 0 2.6

17 5.3 5.2

AM FM

1 3.6 3.6

2 8.0 8.0

3 3.6 3.6

4 3.6 0

500

6 7.9 2.5

7 5.7 5.6

8 8.0 8.0

9 8.0 8.0

10 1.2 1.2

11 0 0.9

12 0 0

13 0.4 0.4

14 4.1 6.9

15 4.6 6.9

16 4.3 4.3

17 4.3 4.3

19 2.5

20 3.7

21 3.2

22 0

23 0

24 0

25 3.5

26 3.5

27 2.5

28 2.5

29 2.5

30 7.8

18 1.0 1.0

19 1.0 1.0

20 1.3 0.9

21 0 0

22 2.6 2.5

Q771(2SA952)

8.0 8.0 7.3

Q773(DTC114Y)

0 0 3.3

18 4.3 4.3

19 4.3 4.3

20 3.3 3.3

21 3.3 3.3

22 2.8 2.9

23 3.5 3.6

24 0.7 0.3

25 0.6 0

26 3.6 3.6

27 3.6 3.6

28 3.6 3.6

29 3.6 3.6

30 2.0 2.2

 21 

< TAPE / AMP > Test condition : Tape function(tape stop)

IC103(BA4560N)

IC202(TA8223K)

Q101(2SB1370E)

1 3.3

2 3.3

3 3.3

5 3.3

6 3.3

7 3.3

8 6.7

IC201(M62495AFP)

1 2.5

2 2.5

3 2.5

4 2.5

5 2.5

6 2.5

7 2.5

2 20.4

3 10.8

4 20.7

5 10.8

6 20.4

8 20.7

9 10.7

10 0.6

11 0

12 0

13 0

14 0.6

15 0

IC101(BA17808)

12.8 12.8 12.1

Q102(DTC114Y)

0 0 4.2

Q103(2SB1370E)

20.7 10.8 20.1

Q104(KTC3198GR)

10.1 20.1 10.7

Q203(2SA952)

20.7 20.7 20.0

8 2.2

9 2.5

10 2.5

11 2.5

12 5.3

13 2.7

14 0

15 2.5

16 2.5

17 2.2

18 2.5

19 2.5

20 2.5

21 2.5

22 2.5

23 2.5

24 2.5

1 12.8

2 8.0

IC102(NJM7806FA)

1 12.8

2 5.9

IC103(NJM78L06)

1 12.8

2 5.9

Q204(KTC3198GR)

3.3 12.8 4.0

 22 

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Printed in Singapore912204

Aiwa LCX-MD211 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual