Sony HCDMC-3-AV Service manual

HCD-MC3AV

SERVICE MANUAL

• HCD-MC3AV is the tuner, deck,
CD and amplifier section in MHC-MC3AV.

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

CD
Section

Tape deck
Section

Model Name Using Similar Mechanism HCD-F150/FR10
CD Mechanism Type CDM-46B1
Optical Pick-up Name KSS-213BA/F-NP
Model Name Using Similar Mechanism HCD-DR8AV
Tape Transport Mechanism Type

US Model

Canadian Model

Australian Model

TCM-230AWR2/230PWR2

Amplifier section
U.S.A models:

AUDIO POWER SPECIFICATIONS

POWER OUTPUT AND TOTAL HARMONIC DISTORTION:
With 8 Ω loads both channels driven, from 70 – 20,000 Hz; rated 80 W per
channel minimum RMS power, with no more than 0.9% total harmonic
distortion from 250 mW to read output.

North American model:
Front Speaker:

Continuous RMS power output

80 + 80 W
(8 Ω at 1 kHz, 10% THD)

Total harmonic distortion

less than 0.09%
(8 Ω at 1 kHz, 40 W)

Center Speaker:

Continuous RMS power output

20 W
(8 Ω at 1 kHz. 1% THD)

Rear Speaker:

Continuous RMS power output

10 + 10 W
(16 Ω at 1 kHz, 1% THD)

Australian model:

The following measured at AC 240 V, 60 Hz;

SPECIFICATIONS

Front Speaker:

DIN power output (Rated)

70 + 70 W
(8 Ω at 1 kHz, DIN)

Continuous RMS power output (Reference)

80 + 80 W
(8 Ω at 1 kHz, 10% THD)

Center Speaker:

DIN power output (Rated)

17.5 W
(8 Ω at 1 kHz, DIN)

Continuous RMS power output (Reference)

20 W
(8 Ω at 1 kHz, 10% THD)

Rear Speaker:

DIN power output (Rated)

8 + 8 W
(8 Ω at 1 kHz, DIN)

Continuous RMS power output (Reference)

10 + 10 W
(8 Ω at 1 kHz, 10% THD)

— Continued on next page —

MICROFILM

MINI HI-FI COMPONENT SYSTEM

The following measured at AC 220 V, 60 Hz;

Front Speaker:

DIN power output (Rated)

Continuous RMS power output (Reference)

Center Speaker:

DIN power output (Rated)

Continuous RMS power output (Reference)

Rear Speaker:

DIN power output (Rated)

Continuous RMS power output (Reference)

Inputs
VIDEO/MD IN (phono jack): voltage 250 mV/450 mV,

Outputs
VIDEO/MD OUT (phono jack):

PHONES (stereo phone jacks): accepts headphones of 8 W or more
SPEAKER: accepts impedance of 8 to 16 Ω

REAR SPEAKER: accepts impedance of 16 Ω
CENTER SPEAKER: accepts impedance of 8 Ω
SUPER WOOFER: voltage 1 V, impedance 1 kΩ

CD player section

System Compact disc and digital audio system
Laser Semiconductor laser (λ =780 mm)

Laser output Max. 44.6 µW*

Frequency response 2 Hz – 20 kHz (± 0.5 dB)
Wavelength 780 – 790 nm
Signal-to-noise ratio More than 90 dB
Dynamic range More than 90 dB
CD OPTICAL DIGITAL OUT
(Square optical connector jack, rear panel)
Wave length 600 nm
Output level –18 dBm

60 + 60 W
(8 Ω at 1 kHz, DIN)

70 + 70 W
(8

Ω at 1 kHz, 10% THD)

15 W
(8

Ω at 1 kHz, DIN)

17.5 watts
(8

Ω at 1 kHz, 10% THD)

7 + 7 W
(8

Ω at 1 kHz, DIN)

8.5 + 8.5 W
(8

Ω at 1 kHz, 10% THD)

impedance 47 kΩ

voltage 250 mV,
impedance 1 kΩ

Emission duration:
continuous

* 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.

Tape player section

Recording system 4-track 2-channel stereo
Frequency response (DOLBY NR OFF)

Tuner section

FM stereo, FM/AM superheterodyne tuner

FM tuner section

Tuning range 87.5 – 108.0 MHz
Antenna FM lead antenna
Antenna terminals 75 W unbalanced
Intermediate frequency 10.7 MHz

AM tuner section

Tuning range 530 – 1,710 kHz

Antenna AM loop antenna
Antenna terminals External antenna terminal
Intermediate frequency 450 kHz

General

Power requirements
North American model: 120 V AC, 60 Hz
Australian model: 220 - 240 V AC, 50/60 Hz
Power consumption
U.S.A models: 250 W
Canadian models: 250 VA
Australian models: 250 W
Dimensions (w/h/d) Approx. 280 × 373 × 437 mm

Mass Approx. 12 kg (26 lbs. 7 oz)
Supplied accessories: AM loop antenna (1)

Design and specifications are subject to change without notice.

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

(with the interval set at 10 kHz)
531 – 1,710 kHz
(with the interval set at 9 kHz)

1

(11

/8 × 143/4 × 171/4 in)

Remote RM-SF250AV (1)
Batteries (2)
FM lead antenna (1)
Speaker cords (5)
Front speaker pads (8)
Center speaker pads (4)

For customers in Canada

(For MHC-MC3AV)

Use only the supplied SS-SR50 rear surround speaker for connection to the REAR
SPEAKER connector, the supplied SS-CN50 center surround speaker for connection
to the CENTER SPEAKER connector on the MHC-MC3AV.

— 2 —

CAUTION

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

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

SAFETY CHECK-OUT

(US model only)

After correcting the original service problem, perform the
following safety checks before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs, screws,
and all other exposed metal parts for A C leakage. Check leakage as
described below.

LEAKAGE

The AC leakage from any exposed metal part to earth ground
and from all exposed metal parts to any exposed metal part having
a return to chassis, must not exceed 0.5 mA (500 microampers).
Leakage current can be measured by any one of three methods.

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

1. A commercial leakage tester, such as the Simpson 229 or RCA
WT -540A. Follo w the manufacturers’ instructions to use these
instruments.

2. A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.

3. Measuring the voltage drop across a resistor by means of a
VOM or battery-operated A C voltmeter . The “limit” indication
is 0.75 V, so analog meters must have an accurate lo w-v oltage
scale. The Simpson 250 and Sanwa SH-63Trd are e xamples of
a passive VOM that is suitable. Nearly all battery operated
digital multimeters that have a 2V AC range are suitable. (See
Fig. A)

To Exposed Metal
Parts on Set

AC

0.15µF

1.5k

Ω

voltmeter
(0.75V)

Earth Ground

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK ! OR DOTTED 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 .

Fig. A. Using an AC voltmeter to check A C leakage.

ATTENTION AU COMPOSANT AYANT RAPPORT

À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFÉS P AR UNE MARQUE ! SUR LES
DIAGRAMMES SCHÉMA TIQUES ET LA LISTE DES PIÈCES SONT
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.

— 3 —

SERVICING NOTES

NOTES ON HANDLING 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-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.

TABLE OF CONTENTS

1. GENERAL

FRONT PANEL ····································································5
REAR PANEL ······································································· 6

2. DISASSEMBL Y ······························································· 8

3. TEST MODE ··································································· 16

4. MECHANICAL ADJUSTMENTS ···························· 18

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 objective lens in the optical pick­up block. Therefore, when checking the laser diode emission, observe
from more than 30 cm away from the objective lens.

LASER DIODE AND FOCUS SEARCH OPERATION
CHECK

Carry out the “S curve check” in “CD section adjustment” and check
that the S curve waveform is output repeatedly.

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.

Flexible Circuit Board Repairing

• Keep the temperature of the 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.

5. ELECTRICAL ADJUSTMENTS

Deck Section ········································································21
CD Section ··········································································· 25

6. DIAGRAMS

6-1. Block Diagram CD Section ············································27

Block Diagram Main Section ········································· 29

Block Diagram Audio Section········································ 31
6-2. Circuit Boards Location ··················································· 33
6-3. Printed Wiring Board BD Section ·································· 35
6-4. Schematic Diagram BD Section····································37
6-5. Printed Wiring Board CD Motor Section ······················· 39
6-6. Schematic Diagram CD Motor Section··························41
6-7. Printed Wiring Board Audio Section······························ 43
6-8. Schematic Diagram Audio Section································· 45
6-9. Printed Wiring Board Leaf SW Section ························· 47
6-10. Schematic Diagram Leaf SW Section ···························· 49
6-11. Printed Wiring Board Main Section ······························· 51
6-12. Schematic Diagram Main (1/5) Section ·························53
6-13. Schematic Diagram Main (2/5) Section ·························55
6-14. Schematic Diagram Main (3/5) Section ·························57
6-15. Schematic Diagram Main (4/5) Section ·························59
6-16. Schematic Diagram Main (5/5) Section ·························61
6-17. Printed Wiring Board Panel Section······························· 63
6-18. Schematic Diagram Panel Section ································· 65
6-19. Printed Wiring Board Surround Amp Section ················67
6-20. Schematic Diagram Surround Amp Section··················· 69
6-21. Schematic Diagram Power Section ································71
6-22. Printed Wiring Board Power Section ····························· 73
6-23. Waveforms········································································ 75
6-24. IC Pin Function Description ············································· 76
6-25. IC Block Diagrams ··························································· 84

— 4 —

7. EXPLODED VIEWS ·····················································86

8. ELECTRICAL PARTS LIST ····································· 94

FRONT PANEL

4
3
2

1

#§
#∞

#¢
#£

#™

#¶

#¡

SECTION 1

GENERAL

576980

!¡
!™

!£

!¢
!∞

!§
!¶

!•
@º!ª

@¡
@™

@£

1 1/u button
2 DISPLAY/MEMO button
3 CLOCK TIMER SET button
4 TIMER SELECT button
5 TAPE A ª button
6 CD fl button
7 TAPE A · button
8 TAPE B ª button
9 TUNER/BAND button
0 TAPE B · button
!¡ SUR button
!™ DBFB button
!£ FUNCTION button
!¢ CONTINUE/DIRECTION button
!∞ PROGRAM/DOLBY-NR button
!§ SHUFFLE/STEREO/MONO button
!¶ REPEAT/TUNER MEMORY button
!• GROOVE button
!ª LOOP button

@¢@∞@ª @•#º @§@¶

@º FLASH button
@¡ CD PLUS ONE button
@™ GROUP ENTRY button
@£ Numeric buttons
@¢ PHONES jack
@∞ VOLUME Knob
@§ STOP button
@¶ INPUT, SCAN, SEARCH, CHECK,

CLEAR, DELETE buttons

@• + )+ button
@ª SELECTOR button
#º =0 – button
#¡ ENTER button
#™ FILE SELECT button
#£ P PAUSE button
#¢ r REC button
#∞ CD SYNCHRO button
#§ HI-SPEED DUBBING button
#¶ PRO LOGIC button

— 5 —

REAR PANEL

2

1

8

7

6

5

4

3

1 VIDEO/MD (AUDIO) jack
2 ANTENNA terminal
3 AC power cord
4 CENTER SPEAKER terminal
5 REAR SPEAKER terminal
6 FRONT SPEAKER terminal
7 CD DIGITAL OUT connector
8 SUPER WOOFER jack

— 6 —

This section is extracted
from instruction manual.

— 7 —

• This set can be disassembled in the order shown below.

)

SECTION 2

DISASSEMBLY

Case
(Page 8)

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

Front panel

section

(Page 9)

Back panel
(Page 10)

Sub
chassis
(Page 11)

Tape mechanism
deck section
(Page 14)

Door assy
(Page 9)

Main board
(Page 10)

CD mechanism
deck section
(Page 12)

Audio board
(Page 14)

2-1. CASE

3

Case

Power transformer (T901)
(Page 11)

Base

unit

(Page 12)

BD board,
sled motor
(M102)
(Page 13)

Capstan motor (M1)
(Page 15)

Optical
pick-up
(KSS-213BA/F-NP)
(Page 13)

2

Three screws

(BVTP 3

×

8)

1

Three screws

(CASE3 TP2)

— 8 —

1

Three screws

(CASE3 TP2

2-2. FRONT PANEL SECTION

y

2

(17 core)

1

Wire (flat type)

(15 core)

9

Two claws

6

(BVTT 3

Wire (flat type)

Screws

7

Lug

×

8)

2-3. DOOR ASSY

1

T wo screws

(PTPWH 2.6

3

Wire (flat type) (15 core)

4

Connector CN108

5

Connector CN454

9

Two claws

8

Three screws

(BVTP 3

×

8)

×

8)

2

Open the door ass'y

— 9 —

A

Remove the door ass'

3

to direction of the
arrow

A

.

2-4. BACK PANEL

N

1

Wire (flat type) (13 core)

2

Connector

5

Thirteen screws

(BVTP 3

6

Remove the back panel

to direction of the arrow.

×

8)

4

Cover

3

Five screws

(BVTP 3

×

8)

2-5. MAIN BOARD

5

Two connectors

3

Four connectors

4

Three connectors

7

Remove the MAI
board to direction
of the arrow.

1

Wire (flat type) (16 core)

— 10 —

2

Wire (flat type) (9 core)

6

Two screws

(BVTP 3

×

8)

2-6. POWER TRANSFORMER (T991)

d

)

4

Power transforme

3

Four screws

(BVTT 3

1

×

8)

Connector

2

Power cor

2-7. SUB CHASSIS

2

Three screws

(BVTP 3 × 8)

3

Sub chassis

1

Two screws

(BVTT 3 × 8)

— 11 —

2

Two screws

(BVTP 3 × 8

2-8. CD MECHANISM DECK SECTION

)

5

7

Reinforcement

1

Screw

(PTPWH 2.6

Two screws

(BVTT 3

×

8)

×

6)

0

(BVTP 3

Screw

6

×

14)

Wire holder

8

Three screws

(BVTT 3

9

!¡

Screw

(BVTT 3

×

10)

Base (LOADING)

!™

×

10)

3

Bwo screws

(BVTP 3

Base (CDM

×

8)

2

Table (SO)

2-9. CD BASE UNIT

2

Bracket

1

Two screws

(BTVP 3 × 8)

3

Two tention springs

5

Base unit

4

Cover (CD)

4

Four screws

(PTPWH 2.6 × 8)

— 12 —

2-10. BD BOARD, SLED MOTOR (M102)

)

6

Gear (A) (S)

5

Claw

!º

Two screws (+P 2 × 2)

!¡

Sled motor

(M102)

8

Gear cover

7

Three claws

9

Gear (B) (RP)

1

Wire (flat type) (16 core

4

BD board

3

Removal

four solders.

2-11. OPTICAL PICK-UP (KSS-213BA/F-NP)

3

Remove the optical
pick-up to direction
of the arrow

A

2

Screw (+PTPWH 2 × 5)

.

A

2

Sled shaft

1

Claw

— 13 —

2-12. TAPE MECHANISM DECK SECTION

d

2

Remove the cassette lid (L) ass'y

to direction of the arrow

B

1

Remove the cassette lid (R) ass'y

to direction of the arrow

B

.

A

A

.

4

Remove the tape mechanism

deck section.

3

Three screws

(BVTP 2.6

3

Three screws

(BVTP 3

×

8)

×

6)

2-13. PANEL BOARD

3

Remove the

cassette lid (R) assy

4

(BVTP 2.6

5

TC bracket

3

cassette lid (L) assy

TORSION SPRING
(DOOR2)

!™

Seven screws

(BVTP 2.6

Two screws

Remove the

Remove the

1

×

×

8)

8)

TORSION SPRING
(DOOR1)

2

2

1

!™

Six screws

(BVTP 2.6

!£

Remove the panel boar

!™

Six screws

(BVTP 2.6

×

8)

×

8)

8

VOL ring

7

VOL ring

6

VOL knob

— 14 —

!¡

JOG ring

0

JOG ring

9

JOG ring

2-14. AUDIO BOARD

3

Two screws

(BTP 2.6

4

AUDIO board

×

4)

2

Break the soldering of two

flexible flat cables.

1

Four rivets

2-15. CAPSTAN MOTOR (M1)

4

Removal the capstan motor

to direction of the arrow.

2

Hang the belt.

3

Hang the belt.

1

Two screws

(BTP 2.6 × 8)

— 15 —

SECTION 3

TEST MODE

[MC Cold Reset]

* The cold reset clears all data including preset data stored in the

RAM to initial conditions. Execute this mode when returning
the set to the customer.

Procedure:

1. Press the three buttons STOP , ENTER and FUNCTION at
the same time.

2. The fluorescent indicator tube turns off for a moment and the
RAM is reset to the initial conditions.

[MC Hot Reset]

* This mode resets the set with the preset data kept stored in the

memory. This hot reset mode is performed also when the power
cord is plugged in and out.

Procedure:

1. Press the three buttons STOP , ENTER and GROUP 1 at the
same time.

2. The fluorescent indicator tube turns off for a moment and the
RAM is reset to the initial conditions.

[CD Initial]

* The CD INITIAL clears all of the CD related data. Execute

this mode when returning the set to the customer.

Procedure:

1. Press the three buttons STOP , ENTER and GROUP 4 at the
same time.

2. The message “STANDBY” appears on the fluorescent indicator
tube and the CD related data is reset to the initial conditions.

[CD Line Test]

* The CD Line test displays the rotating time required for one

rotation by rotating the disc tray.

Procedure:

1. Press the three buttons STOP , ENTER and GROUP 5 at the
same time. The CD PLAY LED and the CD PAUSE LED flash
alternately and the disc tray starts rotation.

2. The message “xx << y.y” appears on the fluorescent indicator
tube. The left numbers count up the discs starting from 1 to 51.
The left numbers “y.y” indicate the rotating time required for
one rotation by rotating the disc tray.

3. To exit the CD LINE test mode, execute the MC Hot Reset.

[CD Memo All Clear]

* The mode clears all contents of the CD disc memo. Execute

this mode when returning the set to the customer.

Procedure:

1. Press the three buttons STOP , ENTER and GROUP 2 at the
same time. The HCD-MC3AV enters the GC test mode, and all
of the fluorescent tubes and LEDs turn on.

2. From this state, any one of the three modes GROUP 1, GROUP
2 and GROUP 3 can be selected. Go to step 3 to enter the
GROUP 1 test mode. Go to step 5 to enter the GROUP 2 test
mode. Go to step 11 to enter the GROUP 3 test mode.

3. [GROUP 1 test mode ] From the state of step 2, press the
GROUP 1 button. Every pressing of the GROUP 1 button
advances the following check modes and displays in the given
order. Model name display, destination display, MC version
display, GC version display, DC ver sion display, VC version
display and CC version display.

4. To exit the GC test mode and to return to the STANDBY mode,
press the STOP , ENTER and GROUP 2 buttons again.

5. [GROUP 2 test mode ] You can enter this mode directly from
step 2. When you performed steps 3, perform steps 4, then 1
and 2 before starting the step 5.
[GROUP 2 test mode ] From the GC test mode, press the
GROUP 2 button to enter the key check mode.
The display: K 1, J 0, V 0 appears.

6. The value after K indicates the number of times that the key is
pressed. 1 is displayed because the GROUP 2 button has
already been pressed.

7. When other keys are pressed one after another, the key count
increases up to 43. The keys which hav e already been pressed,
are not counted.

8. The value after J indicates the number of clicks that the JOG
dial is rotated. The clockwise rotation increases the count value.
The counter-clockwise rotation decreases the count value.

9. The value after V also indicates amount of rotation of volume
control. The clockwise rotation increases the count value. The
counter-clockwise rotation decreases the count value.

10. To exit the GC test mode and to return to the ST ANDBY mode,
press the STOP , ENTER and GROUP 2 buttons again.

11. [GROUP 3 test mode ] You can enter this mode directly from
step 2. When you performed steps 3, perform steps 4, then 1
and 2 before starting the step 5.
[GROUP 3 test mode ] From the GC test mode, press the
GROUP 3 button to enter the VACS attenuation check mode.
The display: VOL NORMAL appears.

12. To exit the GC test mode and to return to the ST ANDBY mode,
press the STOP , ENTER and GROUP 2 buttons again.

[MC Test Mode]

* This mode checks operation of amplifier and cassette deck.

How to enter the MC test mode:

Press the three buttons of STOP , ENTER and GROUP 3 . “EQ
CHECK” display on the FL tube and the VOLUME display flash.
In addition the LEDs of the JOG dial, FF and REW flash indicating
the MC test mode.

Procedure:

1. Press the two buttons MEMO INPUT and FLASH at the
same time.

2. The message “ALL ERASE” appears on the fluorescent
indicator tube and the CD disc memo is all cleared.

[GC Test Mode]

* This mode checks microprocessor version number, keys,

fluorescent tubes, LEDs and VACS (Variable Attenuation
Control System).

— 16 —

Check procedure:

You can perform any of the following five steps. However, it is
recommended to perform them in the following order because the
skipped cannot be performed if the checks are not performed in the
given order.

1. EQ Check Mode

The GEQ becomes maximum when the JOG dial is turned
clockwise.
The GEQ becomes minimum when the JOG dial is turned
counter-clockwise.
The GEQ comes to center when the FILE SELECT button is
pressed.

2. VOLUME Check Mode

The maximum volume is set, and the VOLUME MAX display
and the GEQ display are displayed for a moment regardless of
the amount of volume rotation.
The minimum volume is set, and the VOLUME MIN display
and the GEQ display are displayed for a moment regardless of
the amount of volume rotation.

3. Deck Check Mode

Install a tape to the deck B. Select T APE B with the FUNCTION
button.
Recording starts and PAUSE is released when the REC button
is pressed.
VIDEO is selected by the input FUNCTION.
Press the STOP button to stop recording and select TAPE B
with the FUNCTION button.
Rewind the tape by pressing the REW button and stop at the
recording start point. Start playback from the recording start
point.

4. High Speed Check Mode-1

Install a tape to the deck A. Select T APE A with the FUNCTION
button.
Press the PLAY button then press the HI-SPEED DUBBING
button during playback.
The normal playback is obtained during normal speed playback
and the double speed playback is obtained during the double
speed playback.

5. High Speed Check Mode-2

Install a tape to the deck B. Select T APE B with the FUNCTION
button.
Press the REC button. When the P A USE is released , recording
is started.
When the HI-SPEED DUBBING button is pressed during
recording, the double speed recording is established only when
the button is pressed.

[Aging Mode]

The decks A and B are operated automatically for aging purpose.
When errors occur during aging, causes of errors are displayed and
the aging mode is stopped.

5. The tape A is rewound and stops at the shut-off. The ag ing
mode advances to the next step.
The message: TAPE A AG-5 appears.

6. The tape B is played back in the FWD mode. After two minutes
of the FWD playback, the aging mode advances to the next
step.
The message: TAPE B AG-2 appears.

7. T he tape B runs in fast forward. After two minutes of fast
forward, or at the shut-off point, the tape is stopped and the
aging mode advances to the next step.
The message: TAPE B AG-3 appears.

8. The tape B is played back in the RVS mode. After two minutes
of the R VS playback, the aging mode advances to the next ste p.
The message: TAPE B AG-4 appears.

9. The tape B is rewound and stops at the shut-off. The aging
mode advances to the next step.
The message: TAPE B AG-5 appears.

[Function Change Mode]

* Select either VIDEO or MD of the external FUNCTION input.

Procedure:

1. Turn off the power.

2. Press the two buttons ENTER and POWER at the same time.
The main power is turned on and the other function of the
previous function is selected and displayed. “MD” or “VIDEO”

[AM TUNER STEP 9 kHz/10 kHz Selection Mode]

* Either the 9 kHz step or 10 kHz step can be selected for the AM

channel step.

Procedure:

1. Turn on the power and select TUNER using the FUNCTION
button.

2. Select AM with the TUNER/BAND button and turn off the
power.

3. Press the two buttons FUNCTION and POWER at the same
time. The main power is turned on and the other frequency step
of the previous mode is selected and displayed. “ AM 9 k STEP”
or “AM 10 k STEP”

How to enter the aging mode

1. Turn on the main power. Install a playback tape to deck A and
install a blank tape to deck B.

2. Select TAPE A with the FUNCTION button.

3. Press the three buttons of STOP , ENTER and GROUP
ENTRY at the same time to enter the aging mode.

How to exit the aging mode.

Turn off the main power.

1. Rewind the tapes A and B. Tapes stop at the shut-off of tape A
and the aging mode advances to the next step.
The message: TAPE A AG-1 appears.

2. The tape A is played back in the FWD mode. After two minutes
of the FWD playback, the aging mode advances to the next
step.
The message: TAPE A AG-2 appears.

3. The tape A runs in fast forward. After two minutes of fast
forward, or at the shut-off point, the tape is stopped and the
aging mode advances to the next step.
The message: TAPE A AG-3 appears.

4. The tape A is played back in the R VS mode. After two minutes
of the R VS playback, the aging mode advances to the ne xt step.
The message: TAPE A AG-4 appears.

— 17 —

SECTION 4

e

MECHANICAL ADJUSTMENT

• TAPE MECHANISM DECK SECTION

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

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

• T orque Measurement

Mode

FWD

FWD
back tension

REV

REV
back tension

FF/REW

FWD tension

REV tension

• CD MECHANISM DECK SECTION

To adjust the mechanism section, enter the mechanism section adjustment mode.
For how to enter the mechanism section adjustment mode, refer to each adjustment section.

Torque meter

CQ-102C

CQ-102C

CQ-102RC

CQ-102RC

CQ-201B

CQ-403A

CQ-403R

Meter reading

31 to 71 g • cm

(0.43 – 0.98 oz • inch)

2 to 6 g • cm

(0.02 – 0.08 oz • inch)

31 to 71 g • cm

(0.43 – 0.98 oz • inch)

2 to 6 g • cm

(0.02 – 0.08 oz • inch)

71 to 143 g • cm

(0.98 – 1.99 oz • inch)

100 g or more

(3.53 oz or more)

100 g or more

(3.53 oz or more)

DISC SENSOR ALIGNMENT

1. Make sure that there is no disc in the unit.

2. Connect an oscilloscope to IC401$™, IC4024 of the MAIN board.

oscilloscop

IC401$™ D.SENS (CH1)

IC401

4

HHOUT (CH2)

GND

3. Turn the power switch on.

4. Press the p button, ENTER button and GROUP 5 button simultaneously.

— 18 —

PLUS ONE

5. The disc table rotates in the clockwise direction. The disc table rotation time is displayed with ‘’PLUS ONE” slit as a measuring point.

6. Measure the waveform of the oscilloscope when the disc table is rotating.

7. Move the holder (sensor) center so that the flat portion center at the top of the D.SENS (CH1) input waveform and the ‘’H” center of
HHOUT (CH2) coincide.

D.SENS (CH1) waveform

Holder (sensor)

HHOUT (CH2) waveform

Fixed screw

Flat portion center of
D.SENS (CH1) waveform

8. Tighten the fixed screw to fix the disc table, then press the CLEAR button.

9. The disc table rotates in the counterclockwise direction. Measure the waveform and make sure that the flat portion center at the top of the
D.SENS (CH1) input waveform and the ‘’H” center of HHOUT (CH2) coincide.

10. If the adjustment is not successful, press the CLEAR button to rotate the disc table in the clockwise direction, and perform steps 6 to 9.

Note:During the adjustment mode, the rotational direction is switched each time the CLEAR button is pressed.

Pressing the CHECK button enters the loading mode which will be described later . Pressing the CLEAR button rotates the disc table
again.

— 19 —

MAGNET ASSY ALIGNMENT

)

1. Check that there is no disc in the unit and then turn ON the power. Open the door, and set a disc in the PLUS ONE slit.

2. Close the door, and while pressing the p button, ENTER button and GROUP 5 button simultaneously.

3. Press the CHECK button, and set the loading mode.

4. Press the + ‚± button and chuck the disc.

5. Adjust the magnet assembly and magnet holder so that A = B as shown in the figure.

AB

Magnet ASSY

Magnet holder

Magnet ASSY

Screw (For adjustment

DISC HOLDER A ALIGNMENT

1. Check that there is no disc in the unit and then turn ON the power. Open the door, and set a disc in the PLUS ONE slit.

2. Close the door, and while pressing the p button, ENTER button and GROUP 5 button simultaneously.

3. Press the CHECK button, and set the loading mode.

4. Press the + ‚± button and chuck the disc.

5. Press + ‚± or ≠º – button to stop the disc holder A slightly away from the disc.

6. Rotate and adjust the adjusting screw so that the center of the disc and that of the disc holder coincide.

Disc

Disc holder A

a

a = b

Disc holder A

Disc

b

Screw (For adjustment)

— 20 —

SECTION 5

MAIN
board
CN301
set

test tape
P-4-A100
(10 kHz, –10 dB)

pin

1

oscilloscope

L-CH

R-CH

V

H

waveform of oscilloscope

in phase 45°90°135°180

°

good

wrong

pin

2

pin

3

L

R

ELECTRICAL ADJUSTMENTS

DECK SECTION

0 dB = 0.775 V

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

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

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

4. The adjustments 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 R­CH.

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

• Test Tape

Tape Signal Used for

P-4-A100 10 kHz, –10 dB Azimuth Adjustment

WS-48B 3 kHz, 0 dB Tape Speed Adjustment

P-4-L300 315 Hz, 0 dB Level Adjustment

Record/Playback Head Azimuth Adjustment

DECK A DECK B

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.

Output
level

within
1dB

L-CH
peak

R-CH
peak

within
1dB

Screw
position

L-CH
peak

Screw
position

R-CH
peak

3. Mode: Playback

Note: Perform this adjustments for both decks

Procedure:

1. Mode: Playback

test tape
P-4-A100
(10 kHz, –10 dB)

set

main board
CN301

3

(L-CH)

Pin
Pin

1

(R-CH)

main board
CN301
Pin

2

(GND)

level meter

+
–

4. After the adjustments, apply suitable locking compound to the
pats adjusted.

Adjustment Location:Playback Head (Deck A).

Record/Playback/Erase Head (Deck B).

— 21 —

Tape Speed Adjustment DECK B

r

Note: Start the Tape Speed adjustment as below after setting to the test

mode.
In the test mode, the tape speed is high during pressing the
HI-SPEED DUBBING button.

Procedure:

1. Turn the power switch on.

2. Press the p button, ENTER button and GROUP 3 button
simultaneously.
(The “VOLUME” on the fluorescent indicator tube will blink
while in the test mode.)
To exit from the test mode, press the I/u button.

Mode: Playback

REC Bias Adjustment

DECK B

Procedure:

INTRODUCTION
When set to the test mode performed in T ape Speed Adjustment ,
when the tape is rewound after recording, the “REC memory mode”
which rewinds only the recorded portion and playback is set.
This “REC memory mode” is convenient for performing this
adjustment. During recording, the input signal FUNCTION will
automatically switch to VIDEO.
(If do not operation of stopped from recording complete, after
selecting DECK B with the FUNCTION button, and press
≠º – button then rewind to recording start position.)

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

set

main board
CN301 (Pin

frequency counter

3

: L-CH)

1

: R-CH)

(Pin

+
–

1. Insert the WS-48B into the deck B.

2. Press the · button on the deck B.

3. Press the HI-SPEED DUBBING button in playback mode.
Then at HIGH speed mode.

4. Adjust RV1001 on the LEAF SW board do that frequency
counter reads 6,000 ± 180 Hz.

5. Press the HI-SPEED DUBBING button.
Then back to NORMAL speed mode.

6. Adjust RV1002 on the LEAF SW board so that frequency
counter reads 3,000 ± 90 Hz.

Adjustment Location: LEAF SW board

Sample Value of Wow and filter

W, RMS (JIS) within 0.3%
(test tape: WS-48B)

Playback level Adjustment

DECK A DECK B

Procedure:

Mode: Playback

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

set

level meter

+
–

1. Press FUNCTION button to select VIDEO. (This step is not
necessary if the above test mode has already been set.)

2. Insert a tape into deck B.

3. After press r REC button, press P PAUSE button, then
recording start.

4. Mode: Record

MD/VIDEO (AUDIO) IN

1) 315 Hz

2) 10 kHz

AF OSC

attenuator



50 mV (–23.8 dB)




600

Ω

set

blank tape
CN-123

5. Mode: Playback

recorded
portion

set

CN301 (Pin

(Pin

level mete

3

: L-CH)

1

: R-CH)

+
–

6. Confirm playback the signal recorded in step 3 become
adjustable level as follows.
If these levels do not adjustable level, adjustment the RV341
(L-CH) and R V441 (R-CH) on the AUDIO board to re peat steps
4 and 5.

Adjustable level: Playback output of 315 Hz to playback

output of 10 kHz: ±1.0 dB

Adjustment Location: AUDIO board

main board
CN301 (Pin

(Pin

3
1

: L-CH)
: R-CH)

Deck A is RV311 (L-CH) and RV411 (R-CH), Deck B is RV301
(L-CH) and RV401 (R-CH) so that adjustment within adjustment
level as follows.

Adjustment Level:

CN301 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: AUDIO board

— 22 —

REC Level Adjustment

DECK B

Procedure:

INTRODUCTION
When set to the test mode performed in T ape Speed Adjustment ,
when the tape is rewound after recording, the “REC memory mode”
which rewinds only the recorded portion and playback is set.
This “REC memory mode” is convenient for performing this
adjustment. During recording, the input signal FUNCTION will
automatically switch to VIDEO.
(If do not operation of stopped from recording complete, after
selecting DECK B with the FUNCTION button, and press
≠º – button then rewind to recording start position.)

1. Press FUNCTION button to select VIDEO. (This step is not
necessary if the above test mode has already been set.)

2. Insert a tape into deck B.

3. After press r REC button, press P PAUSE button, then
recording start.

4. Mode: Record

r

MD/VIDEO (AUDIO) IN

AF OSC

315 Hz, 50 mV (–23.8 dB)

attenuator

5. Mode: Playback

600

blank tape

Ω

set

CS-123

recorded
portion

set

CN301 (Pin

(Pin

level mete

3

: L-CH)

1

: R-CH)

+
–

6. Confirm playback the signal recorded in step 3 become
adjustable level as follows.
If these levels do not adjustable level, adjustment the RV301
(L-CH) and R V351 (R-CH) on the MAIN board to repeat steps
4 and 5.

Adjustable level:

CN301 PB level: 47.2 to 53.0 mV (–24.3 to –23.3 dB)
Adjustment Location: MAIN board

[MAIN BOARD] (Component Side)

RV351

R

CN107

CN302

CN106

REC LEVEL

CN301

RV301

L

IC301

[AUDIO BOARD] (Component Side)

RV441

RV401

RV301

LR

PB LEVEL

– DECK B –

[LEAF SW BOARD] (Component Side)

TAPE SPEED



(NORMAL) (HIGH)

RV1002



IC602

RV341

RL



REC BIAS



RV1001

CN601

RV311

PB LEVEL

– DECK A –

CN1001

RV411

LR



— 23 —

CD SECTION

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 10 MW impedance.

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

oscilloscope

BD board

TP (FE)
TP (VC)

10. Confirm that oscilloscope wa veform is clear and check RF signal
level is correct or not.

11. Turn OFF the power, and remove the lead wire connected at
step 7.

Note : A 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 : 1.8 ± Vp-p

+0.3
–0.2

S Curve Check

Procedure :

1. Press the 1/u button to turn ON the power .

2. Open the front cover, and press the CD PLUS ONE button.

3. Set the disc (YEDS-18) into the “PLUS ONE” slit.

4. Close the front cover, and chuck the disc.

5. Press the 1/u button to turn OFF the power.

6. Connect the oscilloscope to TP (FE) of the BD board.

7. Connect TP (ADJ) of the MAIN board and connect TP (GND)
with a lead wire.

8. Press the 1/u button to turn ON the power.

9. The first track will be played back automatically. When the
CHECK button is pressed, “S JI” will be displayed on the
fluorescent indicator tube, and focus search will be repeated.

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

between A and B. And confirm peak to peak level within 1.8 ±

0.6 Vp-p.

S-curve waveform

symmetry

A

within 1.8 ± 0.6Vp-p

B

11. Turn OFF the power, and remove the lead wire connected at

step 7.

Note : • Try to measure several times to make sure than the ratio

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. Press the 1/u button to turn ON the power.

2. Open the front cover, and press the CD PLUS ONE button.

3. Set the disc (YEDS-18) into the “PLUS ONE” slit.

4. Close the fr ont cover, and chuck the disc.

5. Press the 1/u button to turn OFF the power.

6. Connect the oscilloscope to TP (RF) of the BD board.

7. Connect TP (ADJ) of the MAIN board and connect TP (GND)
with a lead wire.

8. Press the 1/u button to turn ON the power.

9. Playback the fifth track of the disc.

— 24 —

E-F Balance (Traverse) Check

The procedure for this checking method differs for when a general
remote control unit is used and not used.

oscilloscope

BD board

TP (TE)
TP (VC)

When a general remote commander is used:

1. Press the 1/u button to turn ON the power.

2. Open the front cover, and press the CD PLUS ONE button.

3. Set the disc (YEDS-18) into the “PLUS ONE” slit.

4. Close the fr ont cover, and chuck the disc.

5. Press the 1/u button to turn OFF the power.

6. Connect the oscilloscope to TP (TE) of the BD board.

7. Connect TP (ADJ) of the MAIN board and connect TP (GND)
with a lead wire.

8. Press the 1/u button to turn ON the power.

9. Playback the fifth track of the disc.

10. Press the 3 button on the remote commander. (The tracking

servo and the sledding servo are turned OFF.)

11. Check the level B of the oscilloscope's waveform and the A

(DC voltage) of the center of the Traverse waveform.
Confirm the following :
A/B x 100 = less than ± 10%

Traverse waveform

0V

Center of the waveform

B

A (DC voltage)

level : 0.7 ± 0.3 Vp-p

12. Press the 8 button on the remote control unit. (The tracking

servo and sledding servo are turned ON.) Confirm the C (DC
voltage) is almost equal to the A (DC voltage) is step 11.

Traverse waveform

0V

Tracking servo
Sled servo

OFF

Tracking servo
Sled servo

ON

C (DC
voltage)

13. Turn OFF the power, and remove the lead wire connected at

step 7.

HCD-F150/FR10

oscilloscope

BD board

TP (TE)
TP (VC)

When a general remote commander is not used:

1. Solder lead wires to TP (DVDD) and TP (TOFF) on the BD
board severally.

2. Connect the oscilloscope to TP (TE) of the BD board.

3. Press the POWER button to turn ON the power.

4. Open the front cover, and press the CD PLUS ONE button.

5. Set the disc (YEDS-18) into the “PLUS ONE” slit.

6. Close the front cover, and chuck the disc.

7. Playback the fifth track of the disc.

8. Short-circuit the lead wire connected at step 1. (The tracking
servo is turned OFF)

9. Check the level B of the oscilliscope's wavefor m and the A
(DC voltage) of the center of the Traverse waveform.
Confirm the following :
A/B × 100 = less than ± 10%

Traverse waveform

Center of the waveform

B

Adjustment Location :

[ BD BOARD ] — CONDUCTOR SIDE —

IC102

(PLCK)

TP

(DVDD)

TP

(FE)

TP

(VC)

TP

(RF)

TP

(TOFF)

IC101

TP

(TE)

TP

CN102

CN103

CN101

0V

A (DC voltage)

level : 0.7 ± 0.3 Vp-p

10. Disconnect the lead wire short-circuited at step 8. (The tracking

servo is turned ON.) Confirm the C (DC voltage) is almost equal
to the A (DC voltage) is ste p 8.

Traverse waveform

C (DC

0V

Tracking servo

OFF

Tracking servo

ON

voltage)

11. Turn OFF the power, and remove the lead wire connected at

step 1.

RF PLL Free-run Frequency Check

Procedure :

1. Connect the frequency counter to TP (PLCK) of the BD board.

[ MAIN BOARD ] — COMPONENT SIDE —

CN301

RV301

IC301

RV351

CN107

CN302

CN106

BD board

TP (PLCK)

frequency counter

2. Press the POWER button to turn ON the power.

3. Open the front cover, and press the CD PLUS ONE button.

4. Set the disc (YEDS-18) into the “PLUS ONE” slit.

5. Close the fr ont cover, and chuck the disc.

6. Playback the fifth track of the disc.

7. Confirm that reading on frequency counter is 4.3218 MHz ±
30 kHz.

— 25 —

— 26 —