Sony HCD-N455K Service Manual

HCD-N455K

SERVICE MANUAL

HCD-N455K is the tuner, deck, CD
and amplifier section in LBT-N455K.

CD

SECTION

T APE

DECK

SECTION

E Model

Tourist Model

Model Name Using Similar Mechanism NEW
CD Mechanism type CDM37-5BD19
Base Unit Type BU-5BD19
Optical Pick-up type KSS-213BA/S-N
Model Name Using Similar Mechanism NEW
T ape Transport Mechanism Type TCM-220WR2E

CD player section

System Compact disc and

digital audio system

Laser Semiconductor laser

(λ = 780 nm)
Emission duration:
continuous

laser output Max 44.6 µW*
* This output is the value measured at a

distance of 200 mm from the objective
lens surface on the Optical Pick-up Block
with 7 mm aperture.

wavelength 780 - 790 nm

T uner section

FM stereo, FM/AM superheterodyne tuner

FM tuner section

87.5 - 108.0 MHz

(50 kHz step)
Aerial FM wire aerial
Aerial terminals 75 ohm unbalanced
Intermediate frequency

10.7 MHz

SPECIFICA TIONS

AM tuner section

Tuning range
Saudi Arabia, Tourist models:

MW: 531 - 1,602 kHz

(with the MW tuning
interval set at 9 kHz)

SW: 5.95 - 17.90 MHz

Other models:

AM: 531 - 1,602 kHz

(with the AM tuning
interval set at 9 kHz)
530 - 1,710 kHz
(with the AM tuning
interval set at 10 kHz)

Aerial AM loop aerial

External aerial
terminals

Intermediate frequency

450 kHz

– Continued on next page –

COMPACT DISC DECK RECEIVER

MICROFILM

— 1 —

Tape player section

Recording system

4-track 2 - channel stereo

Frequency response

40 - 13,000 Hz (±3 dB), using
SONY TYPE I cassette
40 - 14,000 Hz (±3 dB), using
SONY TYPE II cassette

Wow and flutter

± 0.15% W.Peak (IEC)

0.1% W .RMS (NAB)
± 0.2% W.Peak (DIN)

Amplifier section

Peak music power output:

1,200 W (6 Ω at 1 kHz, 10%
THD)

Continuous RMS power output:

(40 W + 40 W) x 2 (6 Ω at
1 kHz, 10% THD)

MODEL IDENTIFICATION

– BACK PANEL –

Parts No.

Inputs
PHONO (phono jack):

Sensitivity 3 mV, impedance
47 kilohms

VIDEO (AUDIO) (phono jack):

Sensitivity 250 mV, impedance
47 kilohms

MIC (phone jack):

Sensitivity 1 mV, impedance
10 kilohms

Outputs
PHONES (phone jack):

accept headphones of 8 ohms or more
FRONT SPEAKER: accept impedance of 6 to 16 ohms
SURROUND SPEAKER:

Malaysia, Singapore models:

accept impedance of 16 ohms

Other models:

accept impedance of 8 to 16 ohms
SUPER WOOFER:

accept impedance of 6 to 16 ohms

General

Power requirements

Malaysia model:

220 - 240 V AC, 50/60 Hz

Other models:

110 - 120 V or 220-240 V AC

adjustable, 50/60 Hz

MODEL

Tourist model
E, Indonesian model
Saudi Arabia model
Singapore model (SP2)
Singapore model (SP4)
Malaysia model

PARTS No.

4-978-191-9π
4-978-192-5π
4-978-192-6π
4-978-192-7π
4-978-192-8π
4-978-192-9π

Note:

The difference between SP2 and SP4 is the back panel only.

Power consumption

185 W

Dimensions

Approx. 355 x 425 x 400 mm
(14 x 16 3/4 x15 3/4 inches) (w/h/d)
incl. projecting parts and controls

Mass

Approx. 11.8 kg (26 lb)

Design and specifications subject to change without notice.

— 2 —

Notes on chip component replacement

• Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be
damaged by heat.

SERVICING NOTE

NOTES ON HANDING THE OPTICAL PICK-UP BLOCK
OR BASE UNIT

Flexible Circuit Board Repairing

• Keep the temperature of soldering iron around 270˚C
during repairing.

• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).

• Be careful not to apply force on the conductor when soldering
or unsoldering.

CAUTION

Use of controls or adjustments or performance of
procedures other than those specified herein may result in
hazardous radiation exposure.

Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.

This appliance is classified as a
CLASS 1 LASER product.
The CLASS 1 LASER
PRODUCT MARKING is located
on the rear exterior.

This caution label
is located inside
the unit.

The laser diode in the optical pick-up block may suffer electrostatic
break-down because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also use
the procedure in the printed matter which is included in the repair
parts.
The flexible board is easily damaged and should be handled with
care.

NOTES ON LASER DIODE EMISSION CHECK

The laser beam on this model is concentrated so as to be focused on
the disc reflective surface by the objecti ve lens in the optical pick-up
block. Therefore, when checking the laser diode emission, observe
from more than 30 cm away from the objective lens.

[FL Display Tube, LED All Lit and Key Check mode]

When the TUNER/BAND , DISPLAY/DEMO , and FILE 2 but­tons are pressed simultaneously, the FL display tube and LEDs will
all light up. Press any button to enter the key check mode.
When the key check mode is entered, the FL display tube displays
“K 1 J0 V0”. Each time a button is pressed, the counter increases in
the following order, K 2 n K 3 n K 4.
If buttons already pressed once are pressed again, the counter will
not increase. When the VOLUME knob is rotated in the + direction,
the count increases in the following order.
V1 n V2 n V3.
When rotated in the – direction, it decreases in the following order.
V0 n V9 n V8.
When the AMS dial is rotated in the clockwise direction, the count
increases in the following order.
J1 n J2 n J3.
When rotated in the counterclockwise direction, it decreases in the
following order.
J0 n J9 n J8.
To exit form the test mode, press the TUNER/BAND , DISPLAY/
DEMO , FILE 2 buttons simultaneously again.

SAFETY-RELATED COMPONENT WARNING !!

COMPONENTS IDENTIFIED BY MARK ! OR DO TTED LINE
WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS
WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS
MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

[Switching the channel step 9 KHz/10 KHz]

Press ENTER/NEXT button and POWER button simultaneously
to switch the AM channel step 9 kHz and 10 kHz. Be sure not to
change with carelessness.

— 3 —

TABLE OF CONTEMTS

Section Title Page

SECTION 1. GENERAL ...................................................... 5

SECTION 2. DISASSEMBLY

2-1. Front Panel Assembly and Main Board ................................. 7

2-2. TC Mechanism Deck ............................................................. 7

2-3. CD Mechanism Deck ............................................................. 8

2-4. BU Bracket Assembly............................................................ 8

2-5. Disc Table .............................................................................. 8

SECTION 3. MECHANICAL ADJUSTMENTS ............ 9

SECTION 4. ELECTRICAL ADJUSTMENTS

DECK Section ............................................................................... 9

TUNER Section........................................................................... 12

CD Section................................................................................... 14

SECTION 5. DIAGRAMS

5-1. Circuit Boards Location ...................................................... 16

5-2. IC Pin Functions

• IC501 Graphic Control (ASD0204) .................................. 17

• IC701 Master Control (TMP87CS64YF) .......................... 18

5-3. Block Diagrams

• Tuner Section (E, SP, IA, MY Model) ............................... 21

• Tuner Section (EA, JE Model) .......................................... 23

• Deck Section...................................................................... 25

• CD Section......................................................................... 27

• Main Section...................................................................... 29

5-4. Printed Wiring Board — CD Section —.............................. 31

5-5. Schematic Diagram — CD Section — ................................ 33

5-6. Schematic Diagram — CD Motor Section — ..................... 36

5-7. Printed Wiring Board — CD Motor Section —................... 37

5-8. Schematic Diagram — Tuner Section —

(E, SP, IA, MY Model) ........................................................ 40

5-9. Printed Wiring Board — Tuner Section —

(E, SP, IA, MY Model) ........................................................ 42

5-10 Schematic Diagram — Tuner Section —

(EA, JE Model).................................................................. 44

5-11. Printed Wiring Board — Tuner Section —

(EA, JE Model).................................................................. 46

5-12. Schematic Diagram — CD Panel Section — .................... 47

5-13. Printed Wiring Board — CD Panel Section — ................. 48

5-14. Printed Wiring Board — Main Section — ........................ 53

5-15. Schematic Diagram — Main Section — ........................... 55

5-16. Schematic Diagram — Deck Section — ........................... 59

5-17. Printed Wiring Board — Deck Section — ........................ 63

5-18. Printed Wiring Board — Power Section — ...................... 66

5-19. Schematic Diagram — Power Section — ......................... 69

5-20. Schematic Diagram — Panel Section —........................... 73

5-21. Schematic Diagram — Panel Section —........................... 77

5-22. Schematic Diagram — Keycon Section — ....................... 81

5-23. Printed Wiring Board — Keycon Section — .................... 83

5-24. IC Block Diagrams — CD Section — .............................. 84

Section Title Page

SECTION 6. EXPLODED VIEWS

6-1. Cabinet and Back Panel Section .......................................... 86

6-2. Panel Board Section ............................................................. 87

6-3. Front Panel Section .............................................................. 88

6-4. Chassis Section .................................................................... 89

6-5. TC Mechanism Section 1 (TCM-220WR2E) ...................... 90

6-6. TC Mechanism Section 2 (TCM-220WR2E) ...................... 91

6-7. TC Mechanism Section 3 (TCM-220WR2E) ...................... 92

6-8. CD Mechanism Section (CDM37-5BD19) .......................... 93

6-9. Base Unit Section (BU-5BD19)........................................... 94

SECTION 7. ELECTRICAL PARTS LIST ................... 95

• Abbreviation
EA : Saudi Arabia model.
SP : Singapore model.
MY : Malaysia model.
JE : T ourist model.
IA : Indonesian model.

— 4 —

SECTION 1

GENERAL

This section is extracted from
instruction manual.

Front Panel

Tuner section

Refer to the pages indicated in parentheses
for details on how to use the controls.

1 SLEEP button (23)
2 SYSTEM POWER switch (7)
3 Remote sensor
4 Display window (30)
5 CURSOR CONTROL buttons (6, 21)
6 TUNING MODE button (12)
7 TUNING +/– buttons (12)
8 TUNER MEMORY button (13)
9 STEREO/MONO button (12)
!º ENTER/NEXT button (6, 9, 21)
!¡ DISPLAY/DEMO button (6, 8, 21)
!™ TUNER/BAND button (12, 18, 24)
!£ REC button (24)
!¢ DAILY 2 button (23)
!∞ DAILY 1 button (23)
!§ TIMER SET button (23)
!¶ CLOCK SET button (6)

Amplifier section

Tape player section

1 MIC 1 jack (25)
2 MIC 2 jack (25)
3 MIC LEVEL control (25)
4 Cassette compartment for DECK A (14)
5 Cassette compartment for DECK B (14)
6 ∏ (pause) button (14)
7 HIGH SPEED DUBBING button (19)
8 CD SYNCHRO button (15)
9 REC (recording) button (15)
!º DIRECTION button (15)
!¡ § EJECT button for DECK B (14)
!™ ‚ (fast rightward) button for DECK B

(14)

!£ º (fast leftward) button for DECK B

(14)

!¢ π STOP button for DECK B (14)
!∞ ª/· (play) button for DECK B (14)
!§ ª/· (play) button for DECK A (14)
!¶ ‚ (fast rightward) button for DECK A

(14)

!• º (fast leftward) button for DECK A

(14)

!ª π STOP button for DECK A (14)
@º § EJECT button for DECK A (14)

Rear Panel

1 AM terminal (4)
2 FM 75Ω terminal (4)
3 PHONO IN jacks (26)
4 VIDEO (AUDIO) IN jacks (26)
5 FRONT SPEAKER connectors (5)
6 SURROUND SPEAKER connectors (5)
7 y ground terminal (5)
8 VOLTAGE SELECTOR (except for

Malaysia model) (6)

9 AC power cord (6)
!º SUPER WOOFER connectors (5)

1 PHONES jack (20)
2 EFFECT button/indicator (20)
3 FILE 1 - 5 buttons/indicators (20, 21)
4 FILE SELECT button/indicators (20, 21)
5 VOLUME control (7, 20)
6 DBFB button (20)
8 SUPER WOOFER button (20)
9 MEMORY button (22)
!º FUNCTION button (7, 14)
!¡ # UP button (26)
!™ ˜ DOWN button (26)
!£ ECHO button (25)
!¢ KARAOKE PON/MPX button (25)

CD player section

1 MUSIC CLIP PLAY button (11)
2 MUSIC CLIP ERASE button (11)
3 CLIP A, B, C buttons/indicators (10)
4 Front cover (7)
5 § OPEN button (7)
6 DISC SKIP button (7)
7 ∏ (pause) button (7)
8 · (play) button (7)
9 π (stop) button (7)
!º AUTO button/indicator (7)
!¡ PROGRAM button (9)
!™ REPEAT button (9)
!£ JOG dial (7)
!¢ SHUFFLE buttons (8)
!∞ CONTINUE button (7)
!§ DISC 1 - 5 buttons (7)

— 5 —

Display Window

Remote

1 Disc calendar (7)
2 Demo mode indications (6)
3 Music calendar (7)
4 CD/TUNER indication (7)
5 Graphic Equalizer indication (21)
6 Multi-display (7, 12, 21)
7 CD play mode indications (8)
8 CLIP indicator (11)
9 Tape direction mode indication (14)
!º Timer indication (24)
!¡ VOLUME indication (7)
!™ KARAOKE h PON/MPX R L

indication (25)

!£ DBFB indication (20)
!¢ SUR indication (15, 21)
!∞ SYNC REC indicator (15)
!§ Tuning mode indications (12)
!¶ STEP/frequency waves indication (12)
!• TUNED/STEREO/MONO indications

(12)

1 SLEEP button (24)
2 LOOP button (10)
3 CD (play) button (7)
4 TUNER/BAND button (12)
5 DECK A button (14)
6 DECK B button (14)
7 FUNCTION button (7,14)
8 MUSIC MENU buttons (20, 21)
9 POWER button (7)
!º ∏ (pause) (7)
!¡ (stop) (7)
!™ buttons (7, 12, 17)
!£ buttons (7, 8)
!¢ EDIT button (8, 17)
!∞ CHECK button (8, 17)
!§ DISC SKIP button (7)
!¶ CLEAR button (8, 17)
!• VOL (volume) +/– buttons (7, 20)

— 6 —

SECTION 2

DISASSEMBLY

Note: Follow the disassembly procedure in the numerical order given.

2-1. FRONT PANEL ASSEMBLY AND MAIN BOARD

1

Remove the connectors.

• Main board (six connectors)

2

Screw (BVTT 3x6)

3

wire

CN401

CN201

6

Screw (BVTP 3x8)

CN402

CN250

2-2. TC MECHANISM DECK

1

Push the eject button (two positions)

5

Front panel
assembly

4

Three screws
(BVTP 3x8)

CN203

3

Three screws
(BVTP 2.6x8)

CN701

8

Main board

4

Four screws
(BVTP 2.6x8)

7

Two screws
(BVTP 3x8)

Eject button

2

Two cassette lids

— 7 —

Eject button

5

Mechanism deck

2-3. CD MECHANISM DECK 2-4. BU BRACKET ASSEMBLY

1

Screw (BVTP 3x8)

2

Two screws
(BVTP 3x8)

3

Two screws
(BVTP 3x8)

4

CD mechanism
deck

2

BU bracket assembly

1

Yoke brack et

2-5. DISC TABLE

Note:

When the Disc table is installed, adjust the positions
of Roller cam and mark ( as shown in the figure,
then set to the groove of disc table.

A

3

Bracket (BU)

1

Screw (BVTP 3x8)

2

Screw (BVTP 3x8)

4

Step screw

5

Disc table

— 8 —

A

SECTION 3

MECHANICAL ADJUSTMENTS

SECTION 4

ELECTRICAL ADJUSTMENTS

PRECAUTION

1. Clean the following parts with a denatured alcohol-moistened
swab :

record/playback heads pinch rollers
erase head rubber belts
capstan idlers

2. Demagnetize the record/playback head with a head demagnetizer.

3. Do not use a magnetized screwdriver for the adjustments.

4. The adjustments should be performed with the rated power sup­ply voltage unless otherwise noted.

Torque Measurement

Torque

FWD

FWD
back tension

REV

REV
back tension

FF/REW

FWD tension

REV tension

Torque meter

CQ-102C

CQ-102C

CQ-102RC

CQ-102RC

CQ-201B

CQ-403A

CQ-403R

Meter reading

36 to 61g • cm

(0.5–0.84 oz • inch)

2 to 6g • cm

(0.02–0.08 oz • inch)

36 to 61g • cm

(0.5–0.84 oz • inch)

2 to 6g • cm

(0.02–0.08 oz • inch)

61 to 143g • cm

(0.85–1.99 oz • inch)

100g or more

(3.53 oz or more)

100g or more

(3.53 oz or more)

DECK SECTION 0 dB=0.775V

1. Demagnetize the record/playback head with a head damagnetizer.

2. Do not use a magnetized screwdriver for the adjustments.

3. After the adjustments, apply suitable locking compound to the
parts adjusted.

4. The adjustmetns should be performed with the rated power sup­ply voltage unless otherwise noted.

5. The adjustments should be performed in the order given in this
service manual. (As a general rule, playback circuit adjustment
should be completed before performing recording circuit
adjustment.)

6. The adjustments should be performed for both L-CH and R-ch.

7. Switches and controls should be set as follows unless otherwise
specified.

Tape

P-4-A100

WS-48B

P-4-L300

Record/Playback Head Azimuth Adjustment

DECK A DECK B

Note : Perform this adjustments for both decks.

Procedure :

1. Mode : Playback (FWD)

Signal

10 kHz, –10 dB

3 kHz, 0 dB

315 Hz, 0 dB

Used for

Azimuth Adjustment

Tape Speed Adjustment

Level Adjustment

test tape
P-4-A100
(10kHz, –10dB)

set

main board
CN403

3

(L-CH)

Pin
Pin 1 (R-CH)

main board
CN403
Pin

2

level meter

+

–

— 9 —

2. Turn the adjustment screw and check output peaks. If the peaks
do not match for L-CH and R-CH, turn the adjustment screw so
that outputs match within 1 dB of peak.

L-CH
peak

screw
position

R-CH
peak

output
level

within
1dB

L-CH
peak

R-CH
peak

within 1dB

screw
position

3. Mode : Playback (FWD)

test tape
P-4-A100
(10kHz, –10dB)

set

main board
CN403
Pin

3

Pin

L

R

oscilloscope

2

Tape Speed Adjustment DECK A
Note : Start the tape speed adjustment as bellow after setting the

test mode. The tape speed can be changed with the HIGH
SPEED DUBBING button during the test mode.

Method :

1. Turn the power switch on.

2. Press the DISPLAY/DEMO button, MENU 1 b utton and TUNER/
BAND button simulateously.

Procedure :

Mode : Playback (FWD)

test tape
WS-48B
(3kHz, 0dB)

set

main board
CN403 (Pin 3 : L-CH)

frequency counter

(Pin 1 : R-CH)

1. Insert tha WS-48B into the deck A to playback.

2. Press the HIGH SPEED DUBBING button. Then at HIGH
SPEED mode.

3. Adjust RV652 on the MD board so that the frequency counter
reading becomes 6,000 ± 30 Hz.

4. Press the HIGH SPEED DUBBING button again to be set the
NORMAL SPEED mode.

5. Set to the playback mode.

6. Adjust RV651 on the MD board so that the frequency counter
reading becomes 3,000 ± 15 Hz.

Pin

1

Waveform of oscilloscope

in phase

good

45

°

90

°

135

°

180

°

wrong

4. Repeat steps 1 to 3 in playback (REV) mode.

5. After the adjustments, apply suitable locking compound to the
parts adjusted.

Adjustment Location : Record/Playback Head (Deck A and B)

FWD side

Adjustment screw

REV side

Frequency difference between deck A and deck B the beginning of
the tape should be within ± 1.5%.
Adjustment Location : MD board

Playback Level Adjustment DECK A DECK B

Procedure :

Mode : Playback (FWD)

test tape
P-4-L300
(315Hz, 0dB)

set

main board
CN403 (Pin 3 : L-CH)

(Pin 1 : R-CH)

level meter

Deck A is RV311 (L-CH) and RV411 (R-CH), deck B is RV301 (L­CH) and RV401 (R-CH) so that adjustment within the following
adjustment level.

Adjustment level :

CN403 PB level : 301.5 to 338.3 mV (–8.2 to –7.2 dB)
level difference between the channels : within ± 0.5 dB

Adjustment Location : MD board

— 10 —

Record Bias Current Adjustment DECK B

2. Mode : Playback

Procedure :

1. Mode : record

VIDEO IN

AF OSC

attenuator

600

1) 315Hz

2) 10kHz

Ω

50mV (–23.8dB)

blank tape
CS-123

set

2. Mode : Playback

recorded
position

set

CN 403 (Pin

(Pin 1 : R-CH)

3

level meter

: L-CH)

Confirm playback the signal recorded in step 1 become adjustment
level as follows.
If these levels do not adjustment level, adjust the RV341 (L-CH) and
RV441 (R-CH) on the MD board to repeat step 1 and 2.

recorded
position

set

main board
CN403 (Pin

(Pin 1 : R-CH)

3

: L-CH)

level meter

Confirm playback the signal recorded in step 1 become adjustment
level as follows.
If these levels do not adjustment level, adjust the RV301 (L-CH) and
RV351 (R-CH) on the main board to repeat steps 1 and 2.

Adjustment level: CN 403 PB level: 47.2 to 53.0 mV

(–24.3 to –23.3 dB)

Adjustment Location : main board

Adjustment Location
[MAIN BOARD] (Component Side)

1
3

CN403

RV351 REC LEVEL (R-CH)

RV301 REC LEVEL
(L-CH)

Adjustment level : The playback output of 10 kHz level difference

against 315Hz reference should be ± 0.5 dB

Adjustment Location : MD board

Record Level Adjustment DECK B

Procedure :

1. Mode : record

VIDEO IN
315Hz, 50mV (–23.8dB)

AF OSC

attenuator

600

Ω

set

blank tape
CS-123

[MD BOARD] (Conductor Side)

RECORD

BIAS

RV301

¬

RV401¬R
PB LEVEL

– DECK B –

R

L

RV441

L

RV341

TAPE SPEED

(NORMAL)

RV651

¬

PB

LEVEL

– DECK A –

L

R

(HIGH)

RV652

¬

¬

¬

— 11 —

TUNER SECTION 0dB=1µV

Note: As a front-end (FE1) is difficult to repair if faulty, replace it

with new one.

AM Tuned Level Adjustment
Note: FM Tuned Level adjustment should be performed after this

AM Tuned Level Adjustment.

• Abbreviation
EA : Saudi Arabia model
JE : Tourist model

Setting:

AM RF SSG

30% amplitude
modulation by
400Hz signal

Modulation: 999 kHz (at 9 kHz step)

1,050 kHz (at 10 kHz step)

loop antenna

60cm

Field strength dB (

loop antenna
(Supplied accessories)

µ

V/m) = SSG output level dB (µV/m) –26dB.

Band: AM or MW

Procedure:

1. Set the output of SSG so that the input level of the set becomes 55
dB.

2. Tune the set to 999 kHz or 1,050 kHz.

3. Adjust RV41 (EA, JE model), RV42 (Other model) to the point
(moment) when the TUNED indicator will change from going
off to going on.

Adjustment Location: TCB board

FM Tuned Level Adjustment
Note: This adjustment should be performed after the AM Tuned Le vel

Adjustment.

set

AM antenna
terminal (TM1)

Adjustment Location
EA, JE model
[TCB BOARD] (Component Side)

RV41
RV41
AM T uned Level

IC41RV42

TM1

RV42
FM T uned Lev el

Setting:

FM RF stereo signal
generator

75 Ω coaxial

set

Carrier frequency: 98MHz
Modulation: AUDIO 1kHz, 75kHz

Output level: 25dB (at 75

deviation (100%)

Ω

open)

FM ANTENNA terminal
(TM1)

Band: FM

Procedure:

1. Supply a 25 dB 98 MHz signal from the ANTENNA terminal.

2. Tune the set to 98 MHz.

3. Adjust RV42 (EA, JE model), RV41 (Other model) to the point
(moment) when the TUNED indicator will change from going off
to going on.

Other model
[TCB BOARD] (Component Side)

RV41

RV41
FM T uned Level

— 12 —

IC2

FE1

RV42

RV42
AM T uned Level

TM1

FE1

SW OSC Voltage Adjustment
(EA, JE model)

Setting:

Band: SW

Procedure:

1. Connect digital Voltmeter to diode D1 center lead and ground.

2. Adjust for a following value reading on digital voltmeter.

part

Reading on

T2

CV2

digital

voltmeter

1.2 ± 0.1 V

8.5 ± 0.2 V

SW

frequency

Adjustment

5.95 MHz

17.9 MHz

SW T racking Adjustment
(EA, JE model)

Setting:

Band: SW

AM RF SSG

set

level meter

Adjustment Location
[TCB BOARD] — Component Side —

RV42

IC41

• Abbreviation
EA : Saudi Arabia model
JE : Tourist model

RV41

D1, CV2, T2
SW OSC Voltage
Adjustment

CV2

CV1

D1

T2

CV1, T1
SW T racking
Adjustment

T1

TM1

30% amplitude
modulation by
400Hz signal

AM ANTENNA terminal

SPEAKER terminal

Procedure:

Adjust for maximum reading on level meter.

SW

Set frequency

Adjustment

7 MHz

17 MHz

part

T1

CV1

• Repeat the procedures is each adjustment several times, and the
frequency coverage and tracking adjustment should be finally done
by the trimmer capacitors.

— 13 —

CD SECTION

S Curve Check

Note :

1. CD Block is basically designed to operate without adjustment.
Therefore, check each item in order given.

2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.

3. Use an oscilloscope with more than 10MΩ impedance.

4. Clean the object lens by an applicatior with neutral detergent when
the signal level is low than specified value with the following
checks.

5. Adjust the focus bias adjustment when optical block is replaced.

Focus Bias Adjustment

oscilloscope
(DC range)

BD board

TP(RF)
TP(VC)

Procedure :

1. Connect oscilloscope to test point TP (RF).
(Ground terminal : VC)

2. Turned Power switch on.

3. Put disc (YEDS-18) in and playback.

4. Adjust RV101 so that the waveform is clear.
(Clear RF signal waveform means that the shape “◊” can be clearly
distinguished at the center of the waveform.)

5. After adjustment, check the RF signal level.

oscilloscope

BD board

TP(FE)

TP(VC)

Procedure :

1. Connect oscilloscope to test point TP (FEO).

2. Connect between test point TP (FOK) and Ground by lead wire.

3. Turn Power switch on.

4. Put disc (YEDS-18) in and turned Power switch on again and
actuate the focus search. (actuate the focus search when disc table
is moving in and out.)

5. Check the oscilloscope waveform (S-curve) is symmetrical
between A and B. And conf irm peak to peak level within 2.4 ± 0.7
Vp-p.

S-curve waveform

Symmetry

A

within 2.4

B

±

0.7 Vp-p

• RF signal
VOLT/DIV : 200 mV
TIME/DIV : 500 nS

level

1.3 ± 0.3 Vp-p

6. After check, remove the lead wire connected in step 2.
Note : • Try to measure se veral times to mak e sure than the r atio of

A : B or B :A is more than 10 :7.

• Take sweep time as long as possible and light up the
brightness to obtain best waveform.

RF Level Check

oscilloscope

BD board

TP(RF)
TP(VC)

Procedure :

1. Connect oscilloscope to test point TP (RF) on BD board.

2. Turned Power switch on.

3. Put disc (YEDS-18) in and playback.

4. Confirm that osilloscope waveform is clear and check RF signal
level is correct or not.

Note : Clear RF signal waveform means that the shape “◊” can be

clearly distinguished at the center of the waveform.

RF signal waveform

VOLT/DIV : 200mV
TIME/DIV : 500nS

— 14 —

level : 1.3 ± 0.3 Vp-p

E-F Balance Check

Adjustment Location

oscilloscope

BD board

TP(TEO)

TP(VC)

Procedure :

1. Connect test point TP703 (ADJ 2) on Main board to Ground with
a lead wire.

2. Connect oscilloscope to test point TP (TEO).

3. Turned Power switch on.

4. Put disc (YEDS-18) in and playback.

5. Confirm that the oscilloscope waveform is symmetrical on the
top and bottom in relation to 0Vdc, and check this level.

Traverse waveform

A

0V

B

±

level : 300

Specified level : • X 100=less than ± 7%

A-B

2(A+B)

100 mVp-p

• A+B=300 ± 100 mVp-p

[BD BOARD] (Conductor Side)

RF

RV101

IC101

RV103

IC104

TEO

VC

FEO

RV102

TEI

FEI

GND

[MAIN BOARD] (Conductor Side)

IC701

FOK

IC102

PCK

6. Remove the lead wire connected in step 1.

Focus/Tracking Gain Adjustment (RV102, RV103)

This gain has a margin, so even if it is slightly off.
There is no problem.
Therfore, do not perform this adjustment.
Please note that it should be fixed to mechanical center position when
you moved and do not know original position.

TP703
(ADJ2)

— 15 —

SECTION 5

DIAGRAMS

5-1. CIRCUIT BOARDS LOCATION

PANEL board

HP board

MIC board

CD LED board

CD (L) board

TC CONTROL board

TRANS board

TCB board

KEY CON board

MAIN board

POWER AMP board

Note: pA is including in MD board.

p

A

MOTOR board

LEAF SWITCH board

TABLE SENSOR board

DOOR SW board

CD JOG board

TC SW board

CD (R) board

MD board
(including pA)

BD board

CD MOTOR board

LED board

— 16 —

5-2. IC PIN FUNCTIONS

• IC501 GRAPHIC CONTROL (ASD0204)

1
2

3, 4

5-9

10
11
12
13
14
15
16

17, 18

19
20
21
22
23
24

25
26-29
30-33

34

35

36

37

38

39

40

41

42
43-45

46

47, 48
49, 50

51-53
54-78

79
80-86

87-100

Pin NamePin No.

V

DD

LED8
LDE7, 6
LED5–1
RESET
X2
X1
IC (Vpp)
XT2
JOG B
V

DD

LED10, 9
KEY SEL
VOL B
REQ. GM
CLK MG
DATA GM
DATA MG
AV

SS

SPEANA 4–1
KEY 4–1
AVDD
AVREF
VOL A
JOG A
RDY MG
SIRCS
VSS
DOR SW
LED SELECT
LED13–11
V

DD

LEDS7, 6
LEDS5, 4
LEDS3–1
SEG32–8
V, LOAD
SEG7–1
GR14–1

I/O

–

+5V
LED drive signal output.

O

Not used.

O
O

LED drive signal output.
Reset signal input.

I

O

X’ tal (4 MHz).

I

GND

–

Not used.

I

AMS encoder signal input.

I

+5V

–

LED drive signal output.

O

Key select control.

O

Volume encoder signal input.

I

Request signal from/to master control.

O

Serial clock input.

I

Serial data output.

O

Serial data input.

I

GND

–

Spectram analizer signal input.

I

Key matrix input.

I

–

+5V

–

Volume encoder signal input.

I

AMS encoder signal input.

I

Ready signal from master control.

I

SIRCS signal input.

I

GND

–

CD door open detection input.

I

LED select signal output.

O

LED drive signal output.

O

+5V

–

Not used.

O

LED drive signal output.

O

LED drive signal output.

O

FL segment signal output.

O

–25V for FL

–

FL segment signal output.

O

FL grid signal output.

O

Function

• Abbreviation
FL: Fluorescent Indicator Tube
GND: Ground

— 17 —

• IC701 MASTER CONTROL (TMP87CS64YF)

10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40

1

VSS

2

XOUT

3

XIN

4

RESET

5

XOUT

6

XIN

7

GND (test)

8

AC CUT

9

SUPER WOOFER ON
ST-MUTE ON
180-A-PLAY
180-B-PLAY
180-B-REC
V. DET
BD-UP (5CD)
TRAY CLOSE (1CD)
ENCODER-1
ENCODER-2
ENCODER-3
OUT SW OPEN
LOAD IN
LOAD OUT
TBL-L
TBL-R
SCOR
TBL-SENS
RDS INT
RDS DATA
DF LAT
SENS
XRST
MG-RDY
ADJ
GM-REQ
MG-CLK
GM-DATA
MG-DATA
CD-CLK
ADJ-2
CD-DATA

Pin NamePin No.

I/O

–

GND

O

X’ tal (10 MHz).

I

Reset signal input.

I

O

X’ tal for clock (32.768 kHz)

I

GND

–

Back up signal input.

I

Super woofer ON/OFF control.

O

Mute signal output for tuner.

O

I

Tape detection sigal input. (Connected to GND)

I
I

Voltage detection (Pull up).

I

Disc table up detect.

I

Connected to GND

I
I

Input selector control signal output. (Pull up)

I
I

Out switch signal input. (Pull up)

I

O

Loading motor control signal output. (Not used)

O
O

Table motor control signal output.

O

Sub-code sync signal input.

I

CD Table sensor signal input.

I

RDS data start input. (Not used)

I

RDS data output. (Not used)

I

Latch signal for digital filter.

O

Table sence signal input.

I

Reset signal output for CD.

O

Ready signal to graphic control.

O

Test mode input.

I

Request signal from graphic control.

I

Clock signal to graphic control.

O

Data input from graphic control.

I

Data output to graphic control.

O

Clock output. Serial bus line.

O

Test mode input.

I

Data output. Serial bus line.

O

Function

• Abbreviation
FL : Fluorescent Indicator Tube
GND : Ground

— 18 —

41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80

Pin NamePin No.

AUB IN
AUB OUT
FOCUS SW
SQ-CLK
SQ-DATA
X-LAT
TEST
VAREF
AV

SS

VSS
VDD
SPEC
DESTINATION
DISC SENS
TC RELAY
A-SHUT
B-SHUT
B-HALF
A-HALF
220-A-PLAY
220-B-PLAY
62427 LAT
K-CON-LAT
VOL LAT (AV)
FRONT SP RELAY B
REAR SP RELAY C
POWER ON
CD POWER
RPOLOG LAT
MUTE
COM CLK
COM DIN
COM DATA
K CON ON
LIDDED LED
MD/VIDEO
DBFB-HIGH
URG STB STDBY
URG SIG ON
TC A

I/O

I

Audio bus in/output. (Not used)

O
O

Focus switching signal output.

O

Subcode Q data read clock output.

I

Subcode Q data input.

O

Latch signal digital signal processor.

I

Test land.

I

Analog reference voltage input.

–

GND

–

+5V

–

I

Destination detection input.

I

Not used.

I

REC/PB select signal output.

O

I
I

Control signal input form deck.

I
I
I
I

PLL latch output.

O

Latch signal for KEY CON.

O

Latch signal for electrical volume. (Not used)

O

Not used.

O

Rear speaker relay control output. (Not used)

O

Power on signal output

O

CD power control signal output.

O

Not used.

O

Mute signal for AMP.

O

PLL clock output. (PLL, Function, Graphic Equalizer)

O

PLL data input. (PLL, Function, Graphic Equalizer)

I

PLL data output. (PLL, Function, Graphic Equalizer)

O

Control signal output for KEY CON.

O

Disc No. LED drive signal output.

O

MD/VIDEO select output. (Not used)

O

DBFB switching signal output.

O

Not used.

I

Not used.

O

Deck A, B select output.

O

Function

— 19 —

Pin No.

81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99

100

Pin Name

NORM
BIAS OFF
REC MUTE
NR OFF
PB
P ASS. AMP/DOLBY
LINE MUTE ON
CAP. M-HIGH
A-TRG
B-TRG
TRG LOW
CAP M ON
STEREO
TUNED
ST-CE
DELAY SEL MIC
DELAY ON
DELAY LEVEL A
DELAY LEVEL B
V

DD

O

NORMAL/HIGH control signal output.

O

Bias oscillation output.

O

Mute output.

O

Dolby ON/OFF signal output. (Not used)

O

REC/PB control signal output. (Not used)

O

Dolby switching signal output. (Not used)

O

Mute signal output for deck.

O

Capstan motor control signal output.

O

Trigger motor control signal output.

O

Trigger motor high/low control signal output.

O

Capstan motor ON/OFF control signal output.

O

Stereo detection signal from tuner.

I

Tuned detection signal from tuner.

I

Latch signal output for tuner.

O

MIC delay select signal output.

O

ECHO delay ON/OFF control signal output.

O
O

ECHO delay level control signal output.

O

+5V

–

FunctionI/O

— 20 —