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CD  ERROR  CODE
The past errors of the optical pick-up system (= optical unit + CD 
board) are displayed as the BD Errors as shown below. 
Procedure:
1.  Press the [

?/1

] button to turn the power on.

2.  Press the [FUNCTION +] button to select CD function.
3.  Press three buttons of [ENTER], [EQ] and [

?/1

] simultane-

ously.

4.  Then, the BD error code is displayed as “D0xxxxxx” (x means 

hexadecimal number) on the liquid crystal display as shown 
below. 

5.  Every pressing of the [ENTER] button in this mode increments 

the number after “D” starting from “D0” up to “D4”, and then 
returns to “D0”. Every pressing of the [TUNE – 

l m] 

button in this mode decrements the number after “M”. The 
smaller the error code number is, the newer the error content is.

6.  To release from this mode, press the [

?/1

] button to turn the 

power off.

Contents of “BD Errors”  
Error display example
 

D  0  02 09 01

 

 

1  2  3  4

1  It indicates the error history number
 

0 to 4: The error code number 0 indicates the newest error.

2  It indicates the error content

01: The focus servo cannot lock-in. 
02: GFS is no good (NG).
03: The startup time exceeds the specifi ed period of time (time 

over)

04:  The focus servo is unlocked continuously. 
05:  Q code cannot be obtained within the specifi ed period of 

time.

06: The tracking servo cannot lock-in.
07: Blank disc

 
3  It indicates the on-going processing of optical pick-up system 

(= optical unit + CD board) when the trouble has occurred.
01:   The CD SHIP mode processing is in progress.
02:   The POWER OFF processing is in progress.
03:   The INITIALIZE processing is in progress.
04:   The optical pick-up system (= optical unit + CD board) is 

in the stop state. 

05:   The STOP operation is in progress.
06:   The startup processing is in progress.
07:   The TOC read-in processing is in progress.
08:   The SEARCH operation is in progress.
09:   The PLAY operation is in progress.
0A:  The PAUSE operation is in progress.
0B:  The PLAY – MANUAL SEARCH operation is in prog-

ress.

0C:  The PAUSE – MANUAL SEARCH operation is in prog-

ress.

4  It indicates the operation that is being processed when the trou-

ble has occurred.

 

It indicates the step number of each processing specifi ed by 

3. 

Because the numbers of steps are different in each processing, 
this number is different in each processing. 

TUNER SECTION      0 dB = 1 μV

[AM]
Setting:
Function: TUNER
Band: AM

[FM]
Setting:
Function: TUNER
Band: FM

Ω

•  Repeat the procedures in each adjustment several times, and 

the  tracking adjustments should be fi nally done by the trimmer 
capacitors.

•  Remove FM antenna in FM adjustment.

Frequency Display

Reading on Digital Voltmeter

531 kHz

1.6 ± 0.3 V

1,602 kHz

7 ± 0.5 V

Adjust for a maximum reading on level meter

L851

603 kHz

Adjustment Part

Frequency Display

Reading on Digital 

Voltmeter

L805

87.5 MHz

1.7 ± 0.1 V

Confi rmation

108 MHz

6.2 ± 0.5 V

Adjust for a maximum reading on level meter

L804

98 MHz

FM  DETECTOR  ADJUSTMENT
Setting:
Function: TUNER
BAND button: FM

1.  Tune the set to 98 MHz.
2.  Adjust L806 so that modulation distortion may become the 

best in the vicinity of the maximum value where the tuner out 
level becomes –15 dBs or more.

Procedure:
1.  Turn on the set.
2.  Input the following signal from signal generator to FM antenna 

input directly.

Carrier frequency : A = 87.5 MHz, B = 98 MHz, C = 108 MHz
Deviation 

: 75 kHz

Modulation 

: 1 kHz

ANT input 

: 35 dBu (EMF)

Note: Use 75 ohm coaxial cable to connect signal generator and the set. 

You cannot use video cable for checking.

 

  Use signal generator whose output impedance is 75 ohm. 

3.  Set to FM tuner function and tune A, B and C signals.
4. Confi rm “TUNED” is lit on the display for A, B and C signals.

When the selected station signal is received in good condition, 
“TUNED” is displayed.

Note:
1.  CD Block is basically constructed to operate without adjustment.
2.  Use YEDS-18 disc (Part No. 3-702-101-01) unless otherwise indicat-

ed.

3.  Use an oscilloscope with more than 10 M

Ω impedance.

4.  Clean the object lens by an applicator with neutral detergent when the 

signal level is low than specifi ed value with the following checks.

5.  Check the focus bias check when optical pick-up block is replaced.

Procedure:
1.  Connect oscilloscope to TP122 (RFEQO) and TP124 (VC) on 

the CD board.

2.  Press the [

?/1

] button to turn the power on.

3.  Press the [FUNCTION +] button to select CD function.
4.  Set the disc (YEDS-18) and press the [

7

] button to playback.

5. Confi rm that oscilloscope waveform is as shown in the fi gure 

below. (eye pattern)

 

A good eye pattern means that the diamond shape (

◊) in the 

center of the waveform can be clearly distinguished.