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3

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

(= optical unit + BD 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 + BD 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. 

Note1: Do not enter the [CD FACTORY MODE] while any other test-

mode is in progress.

Note2: Do not enter any other test mode while the [CD FACTORY 

MODE] is in progress.

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 [u], [USB], and [DISPLAY] simulta-

neously.

4.  It enters the CD factory mode and displays the following mes-

sage.

  –X1ON   

 

 S character mode setting

 

 Tracking servo setting

 

 RF gain setting

Key Operation:
[DISPLAY]:
 

The display changes in the following order when-
ever the button is pressed.

 

(Initial display)

fcsAG ** (**: Focus AGC value)

trkAG ** (**: Track AGC value)

RF-AG ** (**: RF AGC value)

[DSGX]:
 

RF gain setting changes whenever the button is 
pressed.

 

“–”: No gain fi xation.

 

“AL”: Fix to the gain for AL disc.

 

“RW”: Fix to the gain for RW disc.

[EQ]:
 

Tracking servo setting changes whenever the but-
ton is pressed.

 

“ON”: Tracking servo ON.

 

“OFF”: Tracking servo OFF.

[FUNCTION]:
 

S character mode setting changes whenever the but-
ton is pressed.

 

“  ”: S character mode OFF.

 

“S”: S character mode ON.

5.  To release from this mode, press the [

?/1

] button to turn the 

power off.

Note:
1.  CD Block is basically constructed to operate without adjustment.
2.  Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.
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 the oscilloscope to TP121 (RFI) and TP124 (VC) on 

the CD board.

2.  Press the [

?/1

] button to turn the power ON, and press the [

Z

] 

button to open the CD disc tray.

3.  Set disc (YEDS-18) on the trey and press the [u] button to 

playback.

4. 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.

[AM]
Setting:
FUNCTION: AM

Ω

[FM]
Setting:
FUNCTION: FM

Ω

Ω

IC801 pin XL (TUNER VT)

• Repeat the procedures in each adjustment several times.

0 dB = 1 

μV

HCD-EC68USB

Adjustment Part

Frequency Display

Reading on Digital 

Voltmeter

L801

530 kHz

1.5 ± 0.1 V

Confi rmation

1,710 kHz

8 ± 0.5 V

Adjustment Part

Frequency Display

Reading on Digital 

Voltmeter

L801

531 kHz

1.5 ± 0.1 V

Confi rmation

1,602 kHz

7.2 ± 0.5 V

Adjust for a maximum reading on level meter

L805

530 kHz

Adjust for a maximum reading on level meter

L805

531 kHz

Adjustment Part

Frequency Display

Reading on Digital 

Voltmeter

L803

87.5 kHz

1.75 ± 0.1 V

Confi rmation

108 kHz

6.2 ± 0.5 V

Adjust for a minimum reading on level meter

L804

98 MHz

Adjustment Location: MAIN board

FUNCTION: FM

IC801 pin RT

1.  Turn the set to 98 MHz.
2.  Adjust L802 so that modulation distortion may become the 

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

 

Ω

Procedure :
1.  Turn the power on.
2.  Input the following signal from Signal Generator to FM an-

tenna input directly.

*  Carrier Freq : A = 87.5 MHz, B = 98 MHz, C = 108 MHz
 

Deviation  : 75 kHz

 

Modulation  : 1 kHz

 

ANT input  : 35 dBu (EMF)

Note:  Please use 75 ohm “coaxial cable” to connect SG and the set. You 

cannot use video cable for checking.

 

Please use SG whose output impedance is 75 ohm. 

 
3.  Set to FM tuner function and scan the input FM signal with 

automatic scanning.

4. Confi rm that input Frequency of A, B and C detected and auto-

matic scanning stops.

 
The stop of automatic scanning means “The station signal is re-
ceived in good condition”.

IC801 pin XL
(TUNER VT) 

IC801 pin RT
(TUNER OUT L-ch) 

HCD-EC68USB

OPTICAL PICK-UP BLOCK

(KSM-213DCP)

B

C
D

E

A

F

SP+

SP-

LD

PD

VC

AUTOMATIC

POWER

CONTROL

Q301

FOCUS/TRACKING COIL DRIVE,

SLED/SPINDLE MOTOR DRIVE

IC401

CD-MP3 PROCESSOR

IC101

SL+

SL-

T+

T-

F+

F-

CD MECHANISM

DECK

M1-
M2+
M2-

M1+

X102

16.9344MHz

S201

(LIMIT)

CD-L

R-CH

MOTOR

DRIVE

Q311 - 318

SW3
SW2
I-CHACK

SW1

I-STOCK
I-OPEN
I-CLOSE

X801

75kHz

20

19

16

17

15

18

25

3

CN801

ANTENNA

FM/AM

1

BAND-PASS

FILTER

FL803

AM

TRACKING

L805

AM FREQUENCY

COVERAGE

L801

D801

T801

AM IF

FM

TRACKING

L804

FM FREQUENCY

COVERAGE

L803

+9V

FM

DETECTOR

L802

R-CH

TUNER-L

CF801

• SIGNAL PATH

: AM

: CD PLAY

• R-ch is omitted due to same as L-ch.

: FM

Q301

BUS1

BUS0

BUS2
BUS3

BUCK

BUS0 – BUS3,
BUCK, CCE, REQ

DATA SELECTOR

IC303

CCE

REQ

1

BCK

A-IN

LRCK

GATE

ST-REQ

DATA, CLOCK,
A-IN, BCK, LRCK,
GATE, ST-REQ 

CLOCK

DATA