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– 24 –

fL: Low-range frequency
fH: High-range frequency

Signal generator: 400 Hz, 30%, AM modulated

• Setting the Test Mode
When setting the tuner test mode, the frequencies are initialized
in the memory as shown in Table 24. Refer to the microcomputer
test mode function on pages 19 and 23.
If the initialization is executed, the frequencies registered by
the user are changed.

• FM Mute Level
FM Signal oscillator Frequency 400 Hz, 22.5 kHz

98.0 MHz

98.0 MHz

VR351

Input: SO301A

  (30 dB)

Output: Headphones
             terminal

AM IF

T351 Indication of

IF wavefome 450 kHz

set must be 1,620 kHz

is set to max.

AM Band

fL: T306 (522 kHz)

fL: 1.3V 

±

 0.1V

 Coverage (Voltage Set Display of 522 kHz

fH: 8.5V 

±

 1.3V

of TP302 VT line)

(fH is only check)

AM Tracking

fL: T302 (990 kHz)

Set output of
Headphones terminal
to maximum.

P01

  87.50 MHz

P06

   522 kHz

P02

108.00 MHz

P07

1,620 kHz

P03

  90.00 MHz

P08

   603 kHz

P04

106.00 MHz

P09

1,404 kHz

P05

  98.00 MHz

P10

   990 kHz

GND

AM Loop Antenna

AM signal oscillator

Loop Antenna

IF: Headphones
Frequency cover: TP301

Electric
Voltmeter

UNIT

GND

SO301A

Headphones
Terminal

UNIT

Electric
Voltmeter

FM signal oscillator

• To erase the registered broadcast stations
When exiting from the test mode, all preset data is erased.

Applying AC 100V, adjust the VRA100/101 so that the voltage
between + and - of the speaker output terminal (BIA110) is
within 0 

±

 5mV.

BIA110

AC 230V

+

-

VR: 0
Input: AUX

Output:
Speaker
Terminal

Electric
Voltmeter

UNIT

BIA110

LFA04 

LFA05 

LFA03 

QA100 

VRA100

ICA110

ICA100

LFA02

LFA01

VRA101

ICA111

ICA112

ICA104

QA101 

LFA06

BIA111

BIA106

BIA112

ICA101

ICA102

ICA103

1 BIT AMP. PWB

OUTPUT OFFSET
L-CH

OUTPUT OFFSET
R-CH

SO301A

ANTENNA

TERMINAL

C393

FE301 

IC302 

CF302 

IC303 

CF352 

BI302 

VR351

T351

T302

T306

TUNER PWB

AM BAND
COVERAGE

AM IF

FM MUTE
LEVEL

TP301

TP302

AM

GND

FM

AM
TRACKING fL

C368

– 25 –

Enter the test mode, adjust or set as shown in the following table according to the repair operations.

1

Extension PWB for servicing

RUNTK0532AFZZ

2

Extension Connector (2 Pin)

QCNWK0129AFZZ

3

Extension Flat Cable (6 Pin)

QCNWK0130AFZZ

4

Extension Flat Cable (5 Pin)

QCNWK0109AFZZ

5

Extension Flat Cable (28 Pin)

QCNWK0108AFZZ

CN1401

CN1402

CN1101

CN1300

From Magnetic Head
2Pin connector

From Optical
Pickup Unit

Extension PWB for service

(RUNTK0532AFZZ)

Fit the extension PWB for service to the mechanism

From mechanism
switch PWB

2Pin extension connector
QCNWK0129AFZZ

28Pin extension flat cable
QCNWK0108AFZZ

6Pin extension flat cable: QCNWK0130AFZZ

5Pin extension flat cable: QCNWK0109AFZZ

MD MAIN PWB

28Pin 
flexible
PWB

5Pin flat cable

From loading
motor PWB

6Pin flat cable

1

1

1

1

2

5

6

28

Since this CD system has the built-in automatic adjustment function, readjustment is not necessary when replacing the pickup.
Therefore, any combinations of PWB and pickup can be made.
Since automatic adjustment is executed every time the disc is changed, each disc can be played in the most appropriate condition.

PICK replacement 

HEAD replacement 

MECHANISM 
replacement

MAIN PWB
assembly replacement

MD microcomputer
replacement

MD LSI replacement

RF IC replacement

EEPROM IC
replacement 

TEMP

basic

setting

TEMP

Execution item

required

Repair

operations

number        to      and

" – " is an item that you don't have to execute.

The EEPROM writing result is shown at the end of the test mode

Although "SET" was written normally, it was not written in the "YOBI COMPLETE" state.

Peform "AUTO-YOBI" adjustment. After making a normal adjustment, 

write the preliminary adjustment into the EEPROM.

OK_EEPROM: "SET" and "YOBI COMPLETE" were written normally

WR_EEPROM:

NG_EEPROM: "SET" could not be written.

indicate the order of inplementation.

Checking

EEPROM

setting

EEPROM_SET

AUTO-YOBI

adjustment

AUTO-

adjustment

AUTO-FAB

adjustment

AUTO–YOBI AUTO–ADJ AUTO–FAB TEST-CANCEL

Writing the

EEPROM

setting

TEST-CANCEL

Writing the

EEPROM

setting

TEST-PLAY

Operation check

TEST-REC

Check the connection between the MD microcomputer and the EEPROM.

1

1

1

1

1

1

1

2

2

2

1

2

2

3

3

3

2

3

3

4

4

4

3

4

4

5

5

5

4

2

5

5

6

6

6

5

3

6

6

7

7

7

8

9

6

5

8

1

8

9

9

9

4

7

7

8

8

8

– 26 –

1. EJECT mode

• TEMP setting (of EEPROM setting)
• CONTROL setting (of EEPROM setting)
• Setting of laser power (record/playback power)

2. AUTO pre-adjustment mode

• Automatic pre-adjustment is performed.

3. AUTO adjustment mode

• Automatic adjustment is performed. (After adjustment the grating adjustment mode is set.)

4. AUTO AFB adjustment mode

• Focus adjustment is performed.

• RESULT sub-mode

• Therefore do not set this mode since it is not necessary for the service.

• RESULT mode (final adjustment)
• MANUAL pre-adjustment mode
• MANUAL adjustment mode
• MANUAL AFB adjustment mode
• ERROR DATA

5. EEPROM setting mode

• Various coefficients of digital servo are changed manually.

6. TEST-PLAY mode

• Continuous playback from the specified address is performed.
• C1 error rate measurement, ADIP error rate measurement.

7. TEST-REC mode

• Continuous recording from the specified address is performed.

8. INNER mode

• The position where the INNER switch is turned on is measured.

1. While the +10 forward button (+10) and the REC LEVEL/MD Fast Forward button ( 

 ) are pressed down together, press

the POWER button and then MD PLAY button. (State  A  is changed to state  B .)

2. Insert the playback-only disc 1 (high reflection disc) or the recordable disc 2 (low reflection disc). (State is changed to  C .)

Above procedures will set the unit to the test mode.

  A  tsm 22

e

: TEST MODE

 represents version of MD microcomputer.

STOP state

  B  EJECT

  C  AUT AJST

 Entering the specific mode

Whenever the CD PLAY/PAUSE button is pressed, the mode is changed.
If the REC button is pressed instead, the mode will change in the opposite order.

The mode is written on EEPROM by pressing the POWER button. If the POWER button is pressed again, the unit returns to
the normal state.

* Before pressing the POWER button, make sure that the AUTO pre-adjustment, AUTO adjustment, and AUTO AFB adjustment

have been completed.

* After the value of EEPROM is changed or the AUTO pre-adjustment, AUTO adjustment, and AUTO AFB adjustment are

performed again, write on EEPEOM by pressing the POWER button. (When the POWER button is pressed, data is written on
EEPROM.)

* When the value of EEPROM has been changed, write the data on EEPROM once. To perform adjustment using the data, set

the unit to the TEST mode again, perform AUTO pre-adjustment, AUTO adjustment, and AUTO AFB adjustment, and then
write the data again on EEPROM.

(When the MD STOP button is pressed in the   C  state, the indication  A  is
restored. To restore   C  again, press the CD PLAY/PAUSE button.)

1

High reflection disc TGYS1 (SONY) [for Playback]

RRCDT0101AFZZ

2

Low reflection disc

MiniDisc for checking the recording operation

  ––––––––––––

(commercially available MD)

3

Head Adjusting transparent

RRCDT0103AFZZ

4

Low reflection disc

Pre-adjustment disc  [TEAC Test MD]

88GMMD-213AS or
88GMMD-318

A U T O   Y O B I

A U T O   A J S T

R S T   Y O B I

A U T   A F B

E E P R O M _ S E T

M A N   A F B

M N U   Y O B I

  M N U   A J S T

E R R   D A T A

(ERRER DATA)

(AUTO prelimirary adjustment) 

(AUTO adjustment)

(Advanced AFB adjustment)

(RESULT Y O B I )

RESULT  

 (MANUAL AFB adjustment) 

(MANUAL advanced 
AFB adjustment) 

(EEPROM setting)

(MANUAL prelimirary adjustment) 

– 27 –

Step 1

Test mode EJECT state

[ _ _ E J E C T _ _ _ ]

Step 2

Press the CD STOP button.

Playback power output state

[ p p w _ _ _ _ _ _ _ ]

Step 3

Press the CD STOP button.

Rec power output state

[ r p w _ _ _ _ _ _ _ ]

Step 4

Press the CD STOP button.

Therefore do not set this mode since it is not necessary

[ x p w _ _ _ _ _ _ _ ]

for the service.

Step 5

Press the TUNER (BAND) button. TEMP setting of EEPROM setting

(The TEMP setting reference of the EEPROM.)

Step 6

Press the AUX (DEMO) button.

CONTROL setting of EEPROM setting
(The CONTROL setting reference of the EEPROM.)

* Normally, the voltage at pin 3 of IC1401 becomes as follows:

Playback power output (ppw): Approx. DC 0.2V
Recording power output (rpw): Approx. DC 1.8V

Confirmation of pickup laser power
It is possible to confirm in the record/playback mode with the aid of laser power meter.  However, since the laser power meter
measurement is characterized with dispersion, obtained data are used only for confirmation.
     Reference data (at room temperature 25

°

C)

     Playback: 0.72

±

0.1 mW

     Record: 5.5

±

0.5 mW

Note:
Never see directly the laser light.  Otherwise your eyes are injured.

2. AUTO pre-adjustment mode (Low reflection disc only)
With the pre-adjustment disc (MMD213A or MMD-318)

Step 1

Test mode STOP state

[ t s m 

 e 

 ]

Step 2

Press once the CD PLAY button.

AUTO adjustment menu

[ A U T O _ A J S T _ ]

Step 3

Press the MD REC button.

AUTO pre-adjustment menu

[ _ A U T _ Y O B I _ ]

Step 4

Press  once the MD PLAY button. • During automatic adjustment 

 changes as follows.

[ 

 : _ _ _ _ _ _ ]

  HAo

→ 

• 

 

• 

 

• 

 

• 

 

• 

 

• 

 

• 

 

• 

 

•

 →

TCO

End of adjustment

If adjustment is OK, Step 5.
If adjustment is NG, Step 6.

Step 5

Press the MD STOP button.

STEP 2

[ _ C O M P L E T E _ ]

Step 6

Adjustment value output

[  C a n ' t  _  A D J .  ]

Press the MD STOP button.

STEP 2  AUTO adjustment menu

• 

 : Adjustment name

Step 1

Test mode STOP state

[ t s m 

 e 

 ]

Step 2

Press once the CD PLAY button.

AUTO adjustment menu

[ A U T O _ A J S T _ ]

Step 3

Press  once the MD PLAY button. • In case of high reflection disc 

 changes as follows.

[ 

 : _ _ _ _ _ _ ]

  PEG

→

HAG

• In case of low reflection disc 

 changes as follows.

  PEG

→

LAG

End of adjustment

If adjustment is OK, Step 4.
If adjustment is NG, Step 7.

Step 4

For grating adjustment

[ _ C O M P L E T E _ ]

Press the MD PLAY button.

STEP 5

*Note 1

Press the MD STOP button.

STEP 2

Step 5

Continuous playback (pit section)

Confirmation of C1 error

[ s 

 c 

 ]

Continuous playback (groove section)

[ a 

 c 

 ]

Step 6

Press the CD STOP button.

Conformation of ADIP error (Low reflection only)

[ a 

 a 

 ]

Press the MD STOP button.

STEP 2  AUTO adjustment menu

Step 7

Adjustment value output

[  C a n ' t  _  A D J .  ]

Press the MD STOP button.

STEP 2  AUTO adjustment menu

• 

 : Adjustment name,  

 : Measurement value,  

 : Address

* Note 1:
Depending on the disc, "#COMPLETE_" may be displayed, which means that the ON position of the INNER switch cannot be
identified clearly. In this case, check the switch in the INNER mode using the specified disc. However, this is not a problem in AUTO
adjustment.