Sony HCD-N555AVK Service Manual

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SERVICE MANUAL

TEL [phone] QQ 376315150 892498299

HCD-N555AVK is the tuner, deck, CD
and amplifier section in LBT-N555AVK.

* Manufactured under license from Dolby Laboratories

Licensing Corporation.
DOLBY, the double-D symbol a and “PRO LOGIC”
are trademarks of Dolby Laboratories Licensing Corpo­ration.

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CD

SECTION

T APE

DECK

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SECTION

Model Name Using Similar Mechanism HCD-N355/N355K
CD Mechanism type CDM37-5BD19
Base Unit Type BU-5BD19
Optical Pick-up type KSS-213BA/S-N
Model Name Using Similar Mechanism HCD-N355/N355K

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T ape Transport Mechanism Type TCM-220WR2E

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E Model

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SPECIFICA TIONS

CD player section

System Compact disc and

digital audio system

Laser Semiconductor laser

(λ=780nm)
Emission duration:

continuous
laser output Max 44.6 µW*
* This output is the value measured at a distance of 200 mm from the objec-

tive lens surface on the Optical Pick-up Block with 7 mm aperture.

Frequency response 2 Hz-20 kHz (± 0.5 dB)
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

AM tuner section

Tuning range
Saudi Arabia model:

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 interv al set at 10 kHz)

Aerial AM loop aerial

External aerial
terminals

Intermediate frequency

450 kHz

– Continued on next page –

COMPACT DISC DECK RECEIVER

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Tape player section

Recording system

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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:

TEL [phone] QQ 376315150 892498299

1,400 W (6 a t 1 kHz, 10% THD)

Continuous RMS power output:

FRONT SPEAKER
45 W + 45 W (6 ohms, at 1 kHz, 5% THD)
SUPER WOOFER
45 W + 45 W (6 ohms, 5% THD)
SURROUND CENTER SPEAKER
40 W (8 ohms, at 1kHz 5% THD)
SURROUND REAR SPEAKER
20 W + 20 W (16 ohms, at 1 kHz, 5% THD)

Inputs
PHONO (phono jack):

Sensitivity 3 mV, impedance 47 kilohms

LD/VIDEO (AUDIO) (phono jack):

Sensitivity 250 mV, impedance 47 kilohms

MIC (phone jack):

Sensitivity 1 mV, impedance 10 kilohms

TEL

Outputs
PHONES (phone jack):

accept headphones of 6 to 16 ohms
FRONT SPEAKER: accept impedance of 6 to 16 ohms
SURROUND SPEAKER CENTER:

accept impedance of 8 to 16 ohms
SURROUND SPEAKER REAR:

accept impedance of 16 ohms
SUPER WOOFER:

accept impedance of 6 to 16 ohms

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Notes on chip component replacement

• Never reuse a disconnected chip component.

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

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.

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

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This caution label
is located inside
the unit.

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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

Power consumption

240 W

Dimensions

Approx. 355 x 425 x 400 mm (w/h/d)
incl. projecting parts and controls

Mass

Approx. 13 kg

Design and specifications subject to change without notice.

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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.

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NOTES ON HANDING THE OPTICAL PICK-UP BLOCK
OR BASE 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-do wn 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

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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.

SERVICING NOTE

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How to reset all

Pressing the TUNER/BAND , DISPLAY/DEMO and FILE 3 buttons
simultaneously , all are reset and returned to as when the unit was
shipped.

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.

MODEL IDENTIFICATION

– BACK PANEL –

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

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MODEL

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

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Parts No.

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4-978-194-5π
4-978-194-6π
4-978-194-7π
4-978-194-8π
4-978-194-9π

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PARTS No.

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How to switch LD/VIDEO which is the function name of
external input

The LD/VIDEO display which is the function name of external input
is set to "LD" on shipment. The display can be changed as below:
When the power is turned off, pressing the POWER and FUNC­TION buttons simultaneously , "VIDEO" is displa yed on the FL dis­play tube. In this operation, the function name of external input is
switched to "VIDEO". Turn the po wer off in the same way, pressing
the POWER and FUNCTION buttons simultaneously again, "LD"
is displayed on the FL display tube. In this operation, the function
name of external input is switched to "LD". The function names of
external input can be changed at will by the way of the above.

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

2. DISASSEMBLY

2-1. Front Panel Assembly, Main Board and Key Con Board....... 7

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

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

2-4. BU Bracket Assy.................................................................... 8

2-5. Disc Table .............................................................................. 9

3. MECHANICAL ADJUSTMENTS ........................... 10

4. ELECTRICAL ADJUSTMENTS

TEL [phone] QQ 376315150 892498299

DECK Section ............................................................................. 10

TUNER Section........................................................................... 13

CD Section................................................................................... 15

5. DIAGRAMS

5-1. Circuit boards location ........................................................ 17

5-2. IC Pin Functions .................................................................. 18

• IC501 Graphic Control (ASD0204) .................................. 18

• IC701 Master Control (TMP87CS64YF) .......................... 19

5-3. Block Diagrams

• Main Section...................................................................... 22

• Tuner Section

(E, SP, MY, IA Model) ....................................................... 25

• Tuner Section

(EA Model) ........................................................................ 27

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• DECK Section ................................................................... 29

• CD Section......................................................................... 31

5-4. Schematic Diagram — Tuner Section —

(E, SP, MY, IA Model) ......................................................... 34

5-5. Printed Wiring Board — Tuner Section —

(E, SP, MY, IA Model) ......................................................... 36

5-6. Schematic Diagram — Tuner Section —

(EA Model) ......................................................................... 38

5-7. Printed Wiring Board — Tuner Section —

(EA Model) ......................................................................... 40

5-8. Schematic Diagram — CD Panel Section — ...................... 41

5-9. Printed Wiring Board — CD Panel Section —.................... 42

5-10. Schematic Diagram — CD Section — .............................. 45

5-11. Printed Wiring Board — CD Section — ............................ 47

5-12. Printed Wiring Board — Deck Section — ......................... 49

5-13. Schematic Diagram — Deck Section —............................ 51

5-14. Printed Wiring Board — Main Section — ......................... 57

5-15. Schematic Diagram — Main Section —............................ 59

5-16. Schematic Diagram — Panel Section — ........................... 64

5-17. Printed Wiring Board — Panel Section — ........................ 69

5-18. Printed Wiring Board — Power Section — ....................... 73

5-19. Schematic Diagram — Power Section —.......................... 77

5-20. Schematic Diagram — CD Motor Section — ................... 80

5-21. Printed Wiring Board — CD Motor Section — ................. 81

5-22. Schematic Diagram — Key Control Section — ................ 83

5-23. Printed Wiring Board — Key Control Section —.............. 85

5-24. IC Block Diagrams — CD Section — ............................... 86

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TABLE OF CONTEMTS

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6. EXPLODED VIEWS

6-1. Case and Back Panel Section ............................................... 88

6-2. Panel Board Section ............................................................. 89

6-3. Front panel Section .............................................................. 90

6-4. Chassis Section .................................................................... 91

6-5. TC Mechanism Section 1 (TCM-220WR2E) ...................... 92

6-6. TC Mechanism Section 2 (TCM-220WR2E) ...................... 93

6-7. TC Mechanism Section 3 (TCM-220WR2E) ...................... 94

6-8. CD Mechanism Section(CDM37-5BD19)........................... 95

6-9. Base Unit Section (BU-5BD19)........................................... 96

7. ELECTRICAL PARTS LIST ......................................... 97

• Abbreviation
EA : Saudi Arabia model
SP : Singapore model
MY : Malaysia model
IA : Indonesian model

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SECTION 1

GENERAL

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This section is extracted from
instruction manual.

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SECTION 2

DISASSEMBLY

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

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2-1. FRONT PANEL ASSEMBLY, MAIN BOARD AND KEY CON BOARD

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Remove the connectors.

• Main board (six connectors)

• power amplifier board (one connector)

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Screw (BVTP3 X 8)

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Two earth wire

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Front panel assembly

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2-2. TC MECHANISM DECK

Power amplifier board

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Three screws

(BVTP 3X8)

CN1301

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Three screws

(BVTP 2.6X8)

CN203

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CN401

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Screw (BVTP 3x8)

CN201

CN402

CN701

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CN250

Main board

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Key con board

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Two screws

(BVTP 3X8)

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Remove the two cassette lids

direction of arrow.

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Button (eject-L)

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Push the eject button.

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TC mechanism deck

Button (eject-R)

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Four screws

(BVTP 2.6X8)

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2-3. CD MECHANISM DECK

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Two screws
(BVTP 3x8)

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Screw (BVTP 3x8)

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Two screws
(BVTP 3x8)

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CD mechanism
deck

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2-4. BU BRACKET ASSEMBLY

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BU bracket assembly

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Yoke bracket

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2-5. DISC TABLE

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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.

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Bracket (BU)

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Screw (BVTP 3x8)

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Screw (BVTP 3x8)

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Step screw

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Disc table

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SECTION 3

MECHANICAL ADJUSTMENTS

PRECAUTION

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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

TEL [phone] QQ 376315150 892498299

Torque

FWD

FWD
back tension

REV

REV
back tension

FF/REW

FWD tension

REV tension

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Torque meter

CQ-102C

CQ-102C

CQ-102RC

CQ-102RC

CQ-201B

CQ-403A

CQ-403R

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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)

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ELECTRICAL ADJUSTMENTS

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

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test tape
P-4-A100
(10kHz, –10dB)

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Note : Perform this adjustments for both decks.

Procedure :

1. Mode : Playback (FWD)

SECTION 4

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set

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Signal

10 kHz, –10 dB

3 kHz, 0 dB

315 Hz, 0 dB

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main board
CN403
Pin 3 (L-CH)
Pin 1 (R-CH)

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Used for

Azimuth Adjustment

Tape Speed Adjustment

Level Adjustment

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level meter

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main board
CN403
Pin

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2. Turn the adjustment screw and check output peaks. If the peaks

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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

3. Mode : Playback (FWD)

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test tape
P-4-A100
(10kHz, –10dB)

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output
level

R-CH
peak

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set

within
1dB

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L-CH
peak

main board
CN403

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Pin

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R

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Pin

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R-CH
peak

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within 1dB

screw
position

oscilloscope

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Tape Speed Adjustment DECK A

Note : Start the tape speed adjustment as bellow after setting the

Method :

1. Turn the power switch on.

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

Procedure :

Mode : Playback (FWD)

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

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

3. Adjust RV652 on the MD board so that the frequency counter

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

5. Set to the playback mode.

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6. Adjust RV651 on the MD board so that the frequency counter

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

BAND button simulateously.

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

set

SPEED mode.

reading becomes 6,000 ± 30 Hz.

NORMAL SPEED mode.

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reading becomes 3,000 ± 15 Hz.

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main board
CN403 (Pin 3 : L-CH)

(Pin 1 : R-CH)

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frequency counter

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Pin

1

Waveform of oscilloscope

in phase

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

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45° 90° 135° 180°

good

REV side

Adjustment screw

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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

(Pin 1 : R-CH)

Deck A is RV311 (L-CH) and RV411 (R-CH), deck B is RV301 (L­CH) and R V401 (R-CH) so that adjustment within the follo wing 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

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: L-CH)

level meter

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Record Bias Current Adjustment DECK B

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Procedure :

1. Mode : record

AF OSC

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2. Mode : Playback

recorded
position

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

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Adjustment level : The playback output of 10 kHz level dif ference

Adjustment Location : MD board

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attenuator

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set

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LD/VIDEO IN

1) 315Hz

2) 10kHz

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CN 403 (Pin

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50mV (–23.8dB)

set

3

: L-CH)

(Pin 1 : R-CH)

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level meter

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against 315Hz reference should be ± 0.5 dB

1

blank tape
CS-123

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2. Mode : Playback

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recorded
position

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

Adjustment Location : main board

Adjustment Location
[MAIN BOARD] (Component Side)

7

3

Q

Q

9

8

set

main board
CN403 (Pin

(–24.3 to –23.3 dB)

1

3

CN403

5

1

3

6

4

2

(Pin 1 : R-CH)

RV351 REC LEVEL (R-CH)

0

5

1

9

3

: L-CH)

RV301 REC LEVEL
(L-CH)

8

level meter

2

9

8

4

2

9

8

9

2

9

9

TEL [phone] QQ 376315150 892498299

9

Record Level Adjustment DECK B

Procedure :

1. Mode : record

LD/VIDEO IN
315Hz, 50mV (–23.8dB)

AF OSC

600

.

xia

w

w

attenuator

w

set

blank tape
CS-123

o

y

[MD BOARD] (Conductor Side)

RECORD

BIAS

R

¬

L

RV301

u

RV401¬R

PB LEVEL

1

RV441

– DECK B –

6

3

L

RV341

.

c

o

TAPE SPEED

(NORMAL)

RV651

¬

PB

LEVEL

– DECK A –

m

L

R

(HIGH)
RV652

¬

¬

¬

— 12 —

Q

TEL [phone] QQ 376315150 892498299

TUNER SECTION 0dB=1µV

Q

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

AM Tuned Level Adjustment

Note : FM Tuned Level adjustment should be performed after this

Setting :

Band : AM or MW

Carrier frequency : 999kHz (at 9kHz step)

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 1050 kHz .

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

TEL

Adjustment Location : TCB board

7

3

with new one.

AM Tuned Level adjustment.

6

AM RF SSG

30% amplitude
modulation by
400 Hz signal

1050kHz (at 10 kHz step)

3

1

13942296513

5

1

loop antenna

5

0

Q

• Abbreviation

60 cm

Field strength dB (µV/m)=SGG output level dB (µV/m)–26dB.

Adjustment Location

EA model
[TCB BOARD] (Component Side)

7

3

Q

2

9

8

EA : Saudi Arabia model

loop antenna
(Supplied accessories)

AM antenna
terminal (TM1)

0

5

1

5

1

3

6

4

9

8

8

RV41
AM T uned Level

2

9

4

2

9

8

RV41

2

9

9

9

TEL [phone] QQ 376315150 892498299

9

FM Tuned Level Adjustment

Note : This adjustment should be performed after the AM Tuned

Level Adjustement.

Setting :

Band : FM

FM RF SSG

75 coaxial

set

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

deviation (100%)

Output level : 25dB (at 75 open)

Procedure :

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

2. Tune the set to 98 MHz.

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

FM ANTENNA terminal
(TM1) (75 )

RV42

RV42
FM T uned Level

Other model
[TCB BOARD] (Component Side)

RV41

RV41
FM T uned Lev el

IC41

IC2

TM1

FE1

RV42

RV42
AM T uned Level

TM1

Adjustment Location : TCB board

w

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— 13 —

3

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FE1

SW OSC Voltage Adjustment
(EA model)

Q

Q

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.

Set frequency

SW

TEL [phone] QQ 376315150 892498299

SW T racking Adjustment
(EA model)

Setting:

Band: SW

5.95 MHz

17.9 MHz

AM RF SSG

30% amplitude
modulation by
400Hz signal

3

7

6

Adjustment

part

T2

CV2

AM ANTENNA terminal

1

3

set

SPEAKER terminal

5

1

Reading on digital

voltmeter

1.2 ± 0.1 V

8.5 ± 0.2 V

level meter

5

Adjustment Location

0

[TCB BOARD] — Component Side —

• Abbreviation
EA : Saudi Arabia model

RV42

8

9

2

IC41

4

9

D1, CV2, T2
SW OSC Voltage
Adjustment

T2

CV1, T1
SW T racking
Adjustment

CV2

D1

8

RV41

CV1

T1

2

TM1

9

9

TEL [phone] QQ 376315150 892498299

TEL

Procedure:

Adjust for maximum reading on level meter.

SW

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

13942296513

Set frequency

7 MHz

17 MHz

Adjustment

part

T1

CV1

Q

Q

3

7

6

3

1

5

1

5

0

8

9

2

4

9

8

2

9

9

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— 14 —

3

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TEL [phone] QQ 376315150 892498299

CD SECTION

Q

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 10M 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

Procedure :

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

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 clear ly
distinguished at the center of the waveform.)

5. After adjustment, check the RF signal level.

TEL

• RF signal

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

3

7

6

BD board

TP(RF)

TP(VC)

3

1

oscilloscope
(DC range)

13942296513

5

1

5

0

Q

Q

S Curve Check

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

5. Check the oscilloscope waveform (S-curve) is symmetrical

S-curve waveform

7

3

6. After check, remove the lead wire connected in step 2.
Note : • Try to measure several times to make sure than the ratio of

4

2

9

8

BD board

TP(FEO)
TP(VC)

actuate the focus search. (actuate the focus search when disc table
is moving in and out.)

between A and B. And conf irm peak to peak level within 2.4 ± 0.7
Vp-p.

0

5

1

5

1

3

6

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.

9

8

9

oscilloscope

Symmetry

A

B

2

2

8

within 2.4 ± 0.7 Vp-p

2

8

9

4

9

9

9

9

TEL [phone] QQ 376315150 892498299

w

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o

level

1.3 ± 0.3 Vp-p

y

u

1

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

level : 1.3 ± 0.3 Vp-p

6

3

.

c

o

m

— 15 —

E-F Balance Check

7

Q

Q

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.

TEL [phone] QQ 376315150 892498299

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

0V

3

BD board

TP (TEO)

6

TP (VC)

1

3

oscilloscope

level : 300 ± 100 mVp-p

5

1

A

B

5

Adjustment Location :

0

[BD BOARD] (Conductor Side)

RV103

IC104

[MAIN BOARD] (Conductor Side)

TEO

VC

8

RV101

9

RF

IC101

FEO

RV102

GND

2

TEI

FEI

4

FOK

PCK

9

IC102

8

2

9

9

TEL [phone] QQ 376315150 892498299

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

TEL

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.

A-B

13942296513

2(A+B)

• A+B=300 ± 100 mVp-p

Q

Q

3

7

6

3

IC701

5

1

TP703
(ADJ 2)

1

5

0

8

9

2

4

9

8

2

9

9

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— 16 —

3

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SECTION 5
DIAGRAMS

5-1. CIRCUIT BOARDS LOCATION

Q

Q

TEL [phone] QQ 376315150 892498299

TEL

Note: pA is including in MD board.

7

3

13942296513

6

MIC board

CD LED board

3

HP board

CD (L) board

1

PANEL board

TC CONTROL board

5

1

5

DOOR SW board

0

TRANS board

Q

Q

CD JOG board

3

7

8

1

3

6

TC SW board

CD (R) board

2

9

S. WOOFER board

MAIN board

5

1

5

4

9

POWER AMP board

9

8

0

2

8

TCB board

KEY CON board

9

4

2

8

9

2

9

9

TEL [phone] QQ 376315150 892498299

9

w

w

w

LEAF SWITCH board

TABLE SENSOR board

.

xia

p

A MOTOR board

o

y

CD MOTOR board

u

1

6

3

MD board (including

.

c

LED board

o

p

A)

m

BD board

— 17 —

5-2. IC PIN FUNCTIONS

Q

Q

• IC501 GRAPHIC CONTROL (ASD0204)

Pin No.

VDD

1

LED8

2

TEL

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
SPEANA 4–1
KEY 4–1
AV
AVREF
VOL A
JOG A
RDY MG
SIRCS
V

SS

DOR SW
LED SELECT
LED13–11
V

DD

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

3, 4

5-9

10
11
12

TEL [phone] QQ 376315150 892498299

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

7

3

Pin Name

SS

6

13942296513

DD

3

1

I/O

+5V

–

LED drive signal output.

O

LED drive signal output.

O

LED drive signal output.

O

Reset signal input.

I

O

X’ tal (4 MHz).

I

GND

–

I

Not used.
AMS encoder signal input.

I

+5V

–
O

LED drive signal output.
Key select control.

O

Volume encoder signal input.

I

O

Request signal from/to master control.
Serial clock input.

I

Serial data output.

O

I

Serial data input.
GND

–

Spectram analizer signal input.

I
I

Key matrix input.

–

+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

5

1

5

0

Q

Q

3

7

8

Function

3

6

9

1

5

1

2

5

4

0

9

8

9

8

2

4

2

9

8

9

2

9

9

TEL [phone] QQ 376315150 892498299

9

• Abbreviation
FL: Fluorescent Indicator Tube
GND: Ground

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— 18 —

3

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• IC701 MASTER CONTROL (TMP87CS64YF)

7

Q

Q

TEL [phone] QQ 376315150 892498299

TEL

3

Pin No.

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23

13942296513

24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40

6

VSS
XOUT
XIN
RESET
XOUT
XIN
GND (test)
AC CUT
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

3

1

5

I/OPin Name

–

O

I
I

O

I

–

I
O
O

I

I

I

I

I

I

I

I

I

I
O
O
O
O

I

I

I

I
O

I
O
O

I

I
O

I
O
O

I
O

1

5

0

GND
X’ tal (10 MHz)
Reset signal input.
X’ tal for clock (32.768 kHz)
GND

Back up signal input.
Super woofer ON/OFF control.
Mute signal output for tuner.

Tape detection sigal input. (Connected to GND)

Voltage detection (Not used).
Disc table up detect.
Connected to GND

Input selector control signal output. (Pull up)

Out switch signal input. (Pull up)
Loading motor control signal output. (Not used)

7

3

Q

Table motor control signal output.

Sub-code sync signal input.
CD Table sensor signal input.
RDS data start input. (Not used)
RDS data output. (Not used)
Latch signal for digital filter.
Table sence signal input.
Reset signal output for CD.
Ready signal to graphic control.
Test mode input.
Request signal from graphic control.
Clock signal to graphic control.
Data input from graphic control.
Data output to graphic control.
Clock output. Serial bus line.
Test mode input.
Data output. Serial bus line.

Q

6

8

3

9

Function

5

1

1

2

5

4

0

9

8

9

8

2

4

2

9

8

9

2

9

9

TEL [phone] QQ 376315150 892498299

9

• Abbreviation
FL : Fluorescent Indicator Tube
GND : Ground

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3

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Pin No.

Q

Q

41
42
43
44
45
46
47
48
49
50

TEL [phone] QQ 376315150 892498299

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

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

TEL

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
PWM-OUT
PRO-LOGIC
TC A

7

3

SS

6

13942296513

3

I/OPin Name

1

5

1

5

I

Audio bus in/output. (Not used)

O

Focus switching signal output.

O

Subcode Q data read clock output.

O

Subcode Q data input.

I

Latch signal digital signal processor.

O

Test land.

I

Analog reference voltage input.

I

–

GND

–
–

+5V

I

Destination detection input.

I
I

Not used.

O

REC/PB select signal output.
I
I
I

Control signal input form deck.
I

I
I

O

PLL latch output.

O

Latch signal for KEY CONTROL.

O

Latch signal for electrical volume. (Not used)

O

Not used.

O

Rear speaker relay control output.

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)
I

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

O

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

O

Control signal output for KEY CONTROL.

O

Disc No. LED drive signal output.

O

MD/VIDEO select output.

O

DBFB switching signal output.
I

Not used.

O

Dolby pro-logic control ourput.

O

Deck A, B select output.

0

Q

Q

3

7

Function

8

3

6

9

1

5

1

2

5

4

0

9

8

9

8

2

4

2

9

8

9

2

9

9

TEL [phone] QQ 376315150 892498299

9

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— 20 —

3

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Q

TEL [phone] QQ 376315150 892498299

Pin No.

Q

100

3

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

7

6

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

3

1

I/OPin Name

5

O
O
O
O
O
O
O
O
O
O
O
O

I

I
O
O
O
O
O

–

1

5

NORMAL/HIGH control signal output.
Bias oscillation output.
Mute output.
Dolby ON/OFF signal output. (Not used)
REC/PB control signal output. (Not used)
Dolby switching signal output. (Not used)
Mute signal output for deck.
Capstan motor control signal output.

Trigger motor control signal output.
Trigger motor high/low control signal output.

Capstan motor ON/OFF control signal output.
Stereo detection signal from tuner.
Tuned detection signal from tuner.
Latch signal output for tuner.
Not used.
ECHO delay ON/OFF control signal output.

ECHO delay level control signal output.
+5V

0

8

Function

9

2

4

9

8

2

9

9

TEL [phone] QQ 376315150 892498299

TEL

13942296513

Q

Q

3

7

6

3

1

5

1

5

0

8

9

2

4

9

8

2

9

9

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— 21 —

3

.

c

o

m

Q

TEL [phone] QQ 376315150 892498299

Q

3

7

6

3

1

5

1

5

0

8

9

2

4

9

8

2

9

9

TEL [phone] QQ 376315150 892498299

T

E

L

1

3

9

4

2

2

9

6

5

1

3

Q

Q

3

7

6

3

1

5

1

5

0

8

9

2

4

9

8

2

9

9

w

w

w

.

x

i

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6

3

.

c

o

m

Q

TEL [phone] QQ 376315150 892498299

Q

3

7

6

3

1

5

1

5

0

8

9

2

4

9

8

2

9

9

TEL [phone] QQ 376315150 892498299

T

E

L

1

3

9

4

2

2

9

6

5

1

3

Q

Q

3

7

6

3

1

5

1

5

0

8

9

2

4

9

8

2

9

9

w

w

w

.

x

i

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1

6

3

.

c

o

m