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49

Checking Procedure :
1. Load a check disc (MD) TDYS-1.
2. Move the multi-stick and display “CPLAY1MODE” (C34).
3. Press the  PUSH ENTER  button twice and display “CPLAY1

MID”.

4. The display changes to “C1 = 

 AD = 

”.

5. Check that the C1 error rate is below 20.
6. Press the  CLEAR  button while REC IT is lit, stop playback,

press the   MD Z  button while REC IT is off, and remove the
test disc.

Checking Procedure :
1. Load a continuously recorded test disc (MDW-74/GA-1).

(Refer to “6-5. Using the Continuously Recorded Disc”.)

2. Move the multi-stick and display “CPLAY1MODE” (C34).
3. Press the  PUSH ENTER  button and display “CPLAY1MID”.
4. The display changes to “C1 = 

 AD = 

”.

5. If the C1 error rate is below 20, check that ADER is 00.
6. Press the  CLEAR  buttonwhile REC IT is lit, stop playback,

press the   MD Z  button while REC IT is off, and remove the
test disc.

Change the focus bias and check the focus tolerance amount.
Checking Procedure :
1. Load a continuously recorded test disc (MDW-74/GA-1).

(Refer to “6-5. Using the Continuously Recorded Disc”.)

2. Move the multi-stick and display “CPLAY1 MODE”(C34).
3. Press the  PUSH ENTER  button twice and display “CPLAY1

MID”.

4. Press the  CLEAR  button while REC IT is lit when “C1 = 

AD = 

” is displayed.

5. Move the multi-stick and display “FBIAS CHECK”(C16).
6. Press the  PUSH ENTER  button and display “ 

/

 c = 

”.

The first four digits indicate the C1 error rate, the two digits
after [/] indicate ADER, and the 2 digits after [c =] indicate the
focus bias value.
Check that the C1 error is below 20 and ADER is below 2.

7. Press the  PUSH ENTER  button and display “ 

/

 b = 

”.

Check that the C1 error is below 100 and ADER is below 2.

8. Press the  PUSH ENTER  button and display “ 

/

 a = 

”.

Check that the C1 error is below 100 and ADER is below 2

9. Press the  CLEAR  button while REC IT is lit, next press the

MD Z  button while REC IT is off and remove the continuously
recorded disc.

Note 1 : If the C1 error and ADER are above other than the speci-

fied value at points a (step 8. in the above) or b (step 7. in
the above), the focus bias adjustment may not have been
carried out properly. Adjust perform the beginning again.

Be sure to perform this adjustment when the Optical pick-up is re-
placed.
If the adjustment results becomes “Adjust NG!”, the Optical pick-
up may be faulty or the servo system circuits may be abnormal.

Adjusting Procedure :
1. Insert the check disc (MD) TDYS-1.
2. Move the multi-stick to display “AG Set (CD)” (C11).
3. When the  PUSH ENTER  button is pressed, the adjustment will

be performed automatically.
“Complete!” will then be displayed momentarily when the value
is recorded in the non-volatile memory, after which the display
changes to “AG Set (CD)” (C11).

4. Press the   MD Z  button while REC IT is off and remove the

disc.

Adjusting Procedure :
1. Insert the reference disc (MDW-74/GA-1) for recording.
2. Move the multi-stick to display “AG Set (MO)” (C10).
3. When the  PUSH ENTER  button is pressed, the adjustment will

be performed automatically.
“Complete!” will then be displayed momentarily when the value
is recorded in the non-volatile memory, after which the display
changes to “AG Set (MO)” (C10).

4. Press the   MD Z  button while REC IT is off and remove the

disc.

50

NOTE:It is useful to use the jig. for checking the waveform. (Refer

to Servicing Note on page 10.)

51

52

Note:
• All capacitors are in µF unless otherwise noted.  pF: µµF

50 WV or less are not indicated except for electrolytics
and tantalums.

• All resistors are in 

Ω

 and 

1

/

4

 

W or less unless otherwise

specified.

•

f

: internal component.

•

2

: nonflammable resistor.

•

1

: fusible resistor.

•

C

: panel designation.

• X

: parts extracted from the component side.

• Y

: parts extracted from the conductor side.

•

a

: Through hole.

• b

: Pattern from the side which enables seeing.

(The other layers' patterns are not indicated.)

•

U

: B+ Line.

•

V

: B– Line.

•

H

: adjustment for repair.

• Voltages and waveforms are dc with respect to ground

under no-signal (detuned) conditions.

• Voltages are taken with a VOM (Input impedance 10 M

Ω

).

Voltage variations may be noted due to normal produc-
tion tolerances.

• Waveforms are taken with a oscilloscope.

Voltage variations may be noted due to normal produc-
tion tolerances.

• Circled numbers refer to waveforms.
• Signal path.

F

: FM

g

: VIDEO/MD (AUDIO)

E

: PB (DECK A)

d

: PB (DECK B)

G

: REC (DECK B)

J

: CD (Analog)

c

: CD/MD (Digital)

p

: MD (PB)

l

: MD (REC)

• Abbreviation

G

: German model

AED

: North European model

MX

: MExican model

AR

: Argentine model

HK

: Hong Kong model

MY

: Malaysia model

SP

: Singapore model

KR

: Korea model

AUS

: Australian model

Note: The components identified by mark 

0

 or dotted line

with mark 

0

 are critical for safety.

Replace only with part number specified.

Caution:
Pattern face side: Parts on the pattern face side seen from the
(Side B)

pattern face are indicated.

Parts face side:

Parts on the parts face side seen from the

(Side A)

parts face are indicated.

C

B

E

Q

B

C

E

B

C

E