Sanyo GCD 2700 Service Manual

..

Service Manual

...

I FILE NO.

I

CD Changer stereo
Music System

GCD 2700 (AU)

I II

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.Illaoa

II

LE=4E!l

Hww-M El

-..

CONTENTS

SPECIFICATIONS . . . . . . . ..’...... ..’ . . . . . 1

LASER BEAM INFORMATION . . . . . . . . . . . . . 1

OPERATING THE RESET SWITCH . . . . . . . . . 2

COOPERATION . . . . . . . . . . . . . . . . . . . . . . . 2

REMOVAL AND INSTALLATION . . . . . . . . . . . 5

TUNER ADJUSTMENTS . . . . . . . . . . . . . . . . . 7

TAPE DECK ADJUSTMENTS . . . . . . . . . . . . . 9

ILLUSTRATION OF CD CHANGER MOVEMENT 12

CD PLAYER’S SERVICE MODE . . . . . . . . . . . . 15

ADJUSTMENTS . . . . . . . . . . . . . 19

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PRODUCT CODE No.

129 390 02

EXPLODEDVIEW . . . . . . . . . . . . . . . . ...’... 23

PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . 26

INTERCONNECT DIAGRAM . . . . . . . . . . . . . . 37

IC BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . 38

LCD DESCRIPTION . . . . . . . . . . . . . . . . . . . . 41

SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . 42

WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . 44

IC DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . 52

lC& TRANSISTOR VOLTAGES . . . . . . . . . . . . 70

REFERENCE No. SM 580050

I

ii

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;PECIFICATIONS

AMPLIFIER SECTION
Output po+vec

12 Watts/ch (10% THD)
Input sensitivii and impedance VIDEO 300 mV/50 kohms
Graphic equafizer control:

~ 6 d6 (100

Hz, 1 kt-fz. 10 kHz)

Bass expandez

+ 8 de

(lm Hz)

TUNER SECTION
(FM)
Frequency range

87.5 MHz -106.0 MHz (50 kHz eteps)

Usable sensitivity

20.7 d13f (mono)
(AM)
Frequency range

531 kHz -1,701 kHz (9 kHz steps)

Sensitivity:

800 pV/m (AM Loop antenna)

CASSEITE DECK SECTtON
Track system: 4-track, 2-channel stereo
Frequency response

60

t-fz-13 kHz (Cr02)

Signal to noise ratkx

50 dB/56 dB (DOLBY NR OFF/ON)

Wow and fluttec

0.15 % (WRMS)

Tape speed:

4.75 cm/sec

Fast fomard and Rewind time

Approx. 110 sec. (C-60)

CD PtAYER SECTfON
Channels

2-cham’tel stereo

Sampling freque~

441 kHz

Digital filtec

8x0

varsarnpfing

D/A conversion:

Dual 16-hi finear D/A

converters

Pick-up

Optical 3-beam semiconductor laser

Frequency response

20 Hz -20 kHz

Total harmonic distortiorx

0.04% (1 kHz)

Signal to noise ratio

96 dB

Wow and fluttec

Below measurable limits

GENERAL

Power requirements

AC 230-240 V. 50

Hz

Power consumption

sow

Dimensions (W x H x D):

Approx 360x353x399 mm

Weight

APpnJx. 8.2 kg

,, —

. . ... .-

RB-2000 WffRELESS REMOTE CONTROL
Power requirements:

2 “SUM-3/AWRLT’ batteries
Dimensions (W x H x D): Approx.41 x 175x 18mm
Weight

Approx. 63 g (without batteries)

.“ :.

,,

:.’ ..,,.,

.,

IMPORTANT INFORMATION
Because its products are subject to continuous improvement, SANYO reserves the right to modify producf designs and
specifications without notice and without incurring any obligation.

LASER BEAM INFORMATION -

...-. —

.“

:...,

.....

(1) A pick-up that emits a laser beam is used in this compact disc player.

CAUTION - USE OF CONTROLS OR ADJUSTMENTS OR

PERFORMANCE

OF PROCEDURES OTHER

THAN THOSE SPECIFIED HEREIN MAY
RESULT IN HAZARDOUS RADIATION
EXPOSURE.

LASER OUTPUT ...........0.6 mW Max.

DANGER - Invisible laser radiation when open.
AVOID DIRECT EXPOSURE TO BEAM.

I

I 11= EH-Em-=

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-1-

‘L-1

—

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if

“.“.

;----

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#

OPERATING THE RESET SWITCH

● This model is provided with a RESET switch.

● The RESET switch serves to clear the contents of the

memory in the microprocessor (IC103 UPD75112) which
controls the TUNER and CD block.

● Following the procedure below, press the RESET switch to

clear the memory when servicing, or if the key does not
register when the TUNER or CD playe~s operation button

is pressed, or if malfunction occurs.
(1)
(2)

(3)

(4)

Disconnect the power cord from the AC outlet.
Keep the RESET switch depressed for 60 seconds.
(The backed up electrolytic capacitor is discharged by
keeping the RESET switch depressed for 60 seconds.)
Re-connect the power cord to the AC outlet.

Press the TUNER and CD operations, and check their operation.

RESET
SWITCH

—

111—

CD OPERATION (PROGRAM)

....

..

PROGRAMMED PLAY

Up to 32 selections, from up to 5 discs, can be pro­grammed for play in any order.

The same track or disc can be programmed more then
once.

Programming procedure
Follow the example below to program tracks 2 and 6 on
DISC 1, track 9 on DISC 2 and all tracks on DISC 3. in thii
example, each disc has 9 tracks and DISC 3 is in playing
position.

-..

1. Press the MEMORY button.
“’PROG.” blinks on the display.

*

Disc 3 TRAcKAL i%. 1

P~~1234S 6789

2. Select DISC 1 by

pressingthe DISK SKiP (or DISC

SELECT button.

OISC1 TMCK AL Pr. 1

PROG.

/1!

3. Select track 2 by pressing the” DD/ti ““button.
OISC1

TRACK 2 Pr. 1

PROG.

/!!

4. Press the MEMORY button. “’PROG.” remains fit.

OISC1 TPACK2 pr. i

PROG. 2

5. Select track 6 by pressing the “ DO/M2 0’button.

“PROG.” blinks.

OISC1

TRACK 6 Pr. 2

PROO. 2

11!

6. Press the MEMORY button. “PROG.” remains lit.
DISC1 TRACK6 Pr. 2

PROG. 2 6

7. Select DISC 2 by pressing the DISC SKIP (or DISC

SELECT) button. “PROG.” blinks.

DISC2

TPACK AL Pr. 3

P~~.

6. Select track 9 by pressing the” CO/cci “’button.
DISC2

TRACK 9 pr. 3

PROG.

Ilt

9. Press the MEMORY button. “PROG.” remains lit.

DISC2 TRACK9 Pr. 3

PROG.

9

10. Select DISC 3 by pressing the DISC SKIP (or DISC
SELECT) button. “’PROG.” blinks.

OISC3 TRACKAL P;. 4

PROG.

18$

.11. Press the MEMOFtY button. ““PROG.” remains lit.

Disc 3 TPACKAL

Pr. 4

PRCG.

When programming, use the disc aefect buttons to
assign the discs end the K</~ or >>/CCi button
to assign the tracks.
The maximurn%umber of selections that ceh-t%-pr~
grammed is 32. ff you try to enter more selections,
“’FULL” will appear on the display.

Checking the program

1. While in the stop mode, press the MEMORY button. The
disc, track and program numbers wiff appear on the
display. Press the MEMORY button again to view the
disc, track and program numbers for the other pro­grammed selections.

These displays do not appear during programmed
play.

2 Press-the D/oo button” to--at-m Pkw. when all Pro-

grammed selections have played, the player stops
automatically.

During programmed play. if the programmed track
does not exist ofl \he -d=, the next programmed
selection is played.

NOTf3

The program is cleared in the following cases

When the ❑ button is pressed in the stop mode

Changing a program

To add a new aelectlon to a program:

1. In the stop mode. press the MEMORY butron repeat­edly until the following display appears

“’-- . . . ....”.

2. Select a disc and track number.

3. Press the MEMORY button.

To change a selection:

1. Press the MEMORY button repeatedly until the selec-

tion to be replaced is displayed.

2. Select a disc and track number.

3. Prass the MEMORY bulton.

Operation during programmed play

- Press the “ M lad “ or” WIDC4 - button to S~P

programmed tracks.
If the end (or beginning) of the currera srack is reached
in forward (or reverse) search mode, @w player enters
the pause mode.

-2- .

:D OPERATION ●

RECORDING COMPACT DISCS

EDIT RECORDING

NOTES

The following edfi recording operations can be performed.

- CD play starts automatically after 8 seconds, so the

Selections from muftiple discs can be programmed and

recording will not be interrup@d by the feader tape at

recorded automatically.

the beginning Ofsides A and B.

a) Normal edit recording

A short blank space is automatically recorded at the

b) Program edit recording

end of each track.
c) Fade-our edit recording - The highest track number wfriih can be ediied is 32.
d) Backward skip adii recording

s) Normal edit recording

Since track 3 will not rc on rhis side, site e is used inat&xk and M
umecorded blank is cfealed here.

To record a CD with no change in the track sequence,
follow the example befow.
To record all tracks on a S-track disc (total play time of 47
min 20 see) on DISC 2, onto a 50-minute tape:

1. Press the DISC SKfP (or DISC SELECT) button to select
the DISC 2.

lrlsc

SKIP

~

2. Press the EDIT button to select the recording tape
length.

EOIT

o

The display indicates

DISC2 C416

Eti S105 A

123...

..

Each time the EDIT button is pressed, the tape length
display changes in

me following sequence

#246 --C-54 -C@3--74 -C-90=- -(Cleared)l

To set the desired tape length up to C-99, use the

“ kM/c4 ‘“ or “ wlrxi “ button.

To set “C-5W,

press the EDIT button to sefect “CJ$6’. and press the
“’ COIN

“ button 4 times. “C-W” appears on the

display.

3. Insert a C-SOcaasettetapeinto thetapedeckto record

side A.

-. ..

4.

5.

6.

7.

8.

9.

Press the REC buttonto set the racordpause mode for
s“tie A.

● REC >RAv

Cn

——

Press the Plm button to start playback with track 1
on dtsc 2.

me deck starts recording at me sametime.

DISC2 TR4CK 1 0.01 EOITb SIOEA

123...

When all 6f the tracks for side A have finished playing,

the player will go to pause mode at the beginning of
the track to be recorded onto side B.

After the tape deck stops aufomadceffy, turn wer the

cassette and reinsen it-

-----

Press the REC button to start recording of side B.
The player will start playback with track 3 on disc 2.
When all tracks for side B have finished, disc play

stops.
The tape

deck will continue recording tome end ofthe

tape (side B).

The edit mode remains operational when recording

ends. Press the o button to cancef the edii

mode

--- .. . -

b) Program edit recordfrkg

Unrecorded blank

SlCEA23min.

Track 3 on DISC 3

Track 5 on DISC

1

II

-

Track 2 on DISC 1

II ‘ I

#i

I

1]

[1

‘,3

Mmud

r—

Track 4 on OISC 2

Track 1 on OfSC 3

[ Tr&k 7 on DISC 2 SIDE 823 min.

Unre&ded blank

1. Press the EDIT button until ““C-4& appears.

The desired selections can be rearranged and recorded
on the tape within a designated tape length.

EO,l

Q

Examde:

The f~llowing tracks are to be recorded.

Track 5 on DISC 1:10 min 00 sec
Track 2 on DISC 1:7 min 26 sec

2. Press the DISC SKIP (or DISC SELECT) button to
sefect the disc

(DISC1).

Track 3 on DISC 34 min 37 sec

Usc

YaP

Track 1 on DISC 3:11 min 09 sec

~

Track 4 on DISC 2:9 min 21 sec
Track 7 on DISC 21 min 10 sec

3. Press the MEMORY button.

These tracks are recorded in the following order on a 46-

minute tape.

SIDE A

Track 5 on DISC 1
Track 2 on DISC 1
Track 3 on DISC 3

SIDE B: Track 1 on DISC 3

Track 4 on DISC 2
Track 7 on DISC 2

Ie5

“PROG.” btinks and the dispfay indicates:

DISC 1 TR4CKAL 23.00 EOIT SIDEA

P:~

123...

The remaining time on side A blinks on the time

display.

-3–

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9

CD

......

............. . .

OPERATION

4. press the w/@ or w/~ b~on to select the tfacfr 7. Repeat steps 2-5 to program the tracks to be re­(lRACK 5). ~~ XM

~

corded onto side B.

“PROG.” remains Iii. If a track exceeding the remaining time on side B is

OISC i TRAcK 5 13.00 EO~ s05 A programmed, “Err’” wiii appear in the display for 4

PROQ. 1 23 ...

seconds.

S. Press the MEMORY button. 8. Insert the C-46 cassette tape into the tape

deck to

[=1

record side A

9. Press the REC button. ‘=CC

b

RAY

I 1

‘“PROG.O’remains lit.

DISC 1 TRACK 5 13.00 EOIT SIDE A

LL.1

PROO. 5

10. Press the Dim bunon. Recording starts.

6. Repeat steps 2-5 to program the tracks to be

re-

cmded onto side A

m

Ifa track which exceeds the remaining time oneide
A is selected, its remaining time bfinks on the d@

The programmed tracks will play in sequence starting

from track 5 on cksc 1, and pause at the end of track 3
on disc 3.

play.
When the MEMORY button is pressed, “SIDE A“

DISC 1 TRACK5 0.01 EOITD

SIOEA

disappears and “SIDE B“ appears. The rem-g

PROO. 25

time Dn side B appears on the display. Thii and
subsequent tracks are recorded on side B.

11. Follow steps “W’ to”1 O of ‘“Normal edit recording”.

C) Fade-ouf edff recording
The sound is automatjcaffy faded out at the

end ofsides A

end B, according to the selected tape len@’t.

Fade out (10 see.)

SIOE A so min.

.-.

1

II

2

II

3

II

4

II

s

11

a

II II II

11

>

Manual reverse

11

10

a

a

7

e

I

Fade our (10 sec.)

Example

To record onto a 60-minute tape

1.

2

3.

4.

5.

d)

1.

2

3.

4.

Press the EDfT button un~l “C-W’ appears on the
display.
Press the FADE button.

-.,
‘“FADE” appears.
Insert a C-60 cassene tape into the tape deck to record

side A.

(If you desire, program the tracks. Refer to PRO-

GRAMMED PLAV on page 10)

Press the REC button.

Press the D/oo bunon. Recording starts.
The pfayerwill start playback with track 1 onsideAand
proceed in sequence until track 6 is recordecL The
display indicates:

OISC 1 TRACK 1 FADE 0.01 EOIT D SIDE A

123...

. . ... .

Record from the beginning of a track. SIOE B 30 min.

6.

Follow steps “’6 to ‘“1W of “’Normal ed~ recording”.

“’FADE blinks as the sound fades out (1O seconds).
When the remaining tape length is lass than 10 sec.,
the track, curreryJ playing is not faded out.

. _.. _ ._

The sound isalso faded out when a track is interrupted

... .. .

at the end of side B.

.

Backward skip edit recording

Track 4 will be interrupted.

. .

S1OEA -1 -’

1

!1

2

II

3114

811711 6

II

5

II

4

~>

Manual rewerse

SIOE B f

Record from the beginning of a track.

Track a will be interrupted

Press the EDtT button until “C-”

appears cm the
display.
Press the REC button.
Press the b/Oo button.
Recording starts on side A with track 1.

Follow steps “6’ to “9’ of “Normal edit recorder@-.

MANUAL RECORDING

1.

2.

,..,.:..

.. . ..:”,

... . .. .

For programmed recording, program the matssi@f in
advance (as described under “PROGRAMMED PtXY’).
Press the REC button.
Press the D/oo bunon. Recording starts.

If-the FADE button is pressed during racordinf& the
sound begins to fade out irom that point (abm9t 10
seconds). The CD player pauses, but the

deck @rntin-

ues recording.

–4–

..

v

{EMOVAL AND INSTALLATION

. Disconnect the power cord plug from the electrical oudet.

● All wiring should be returned to the original posistion after work is completed.

. First have reading many tie new FIXERS (614 129 4971) for replacement.

I. REMOVAL OF FRONT PANEL ASSEMBLY

(1) Remove the 6 CD changer block mounting screws. ((0)

(2) Remove the 8 side panel mounting screws. (@)
(3) Remove the 11 rear

panel mounting screw. (@))

). REMOVAL OF FRONT PANEL BUTTONS

. . ..

‘.,,

., .,..

.’. ....

....

-5-

,..

.

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REMOVAL

AND INSTALLATION

c.

REMOVAL OF TAPE MECHANISM & P.C. BOARD

(1) Remove the 2 tape

deck P.C.Board mounting screw.

(0)

(2) Remove the 6 tape mechanism mounting

screws. (@)

A

d. WIRING IAYOUT

DISC TABLE SENSOR P.C.B

... .

-...

-A

——

—— .

(a) CD MECHANISM BLOCK

*

.—. — —.

>—’ “-”-”-

, ,!c-

. Arrange the wiring as shown in the figure.

h

.

MARK@

YELLOW m /

rGRAY

..,..,
...

‘“FL-i&ii!sI

\\ \ \\

A

%

-6-

:: TABLE MOTOR

ii

..

●

REMOVAL AND INSTALLATION

(b) POWER CORD
.

Arrange the Power cord as shown illustration.

(c) POWER AMP P.C. BOARD

(1)Arrange the lead wire so that they are not near the

heat sink of the POWER AMP P.C. Board.

LEAD WIRE MUST NOT

TOUCH TO HEAT SINK

N

POWER AMP P.C.B

HEAT SINK

rUNER

.

\\

\

POWER SWITCH PC.B

+~gy.

m

BLACK

RED

\ /

\

/

FXXER

(614

1294971)

(d) POWER TRANSFORMER
(1) See illustrations.

ADJUSTMENTS

.

----

-. .-.

TUNER P.C.B

1

J’

I@l

’432

J&Oc

T2202

J434

IL

’430

TP204

TP235 -

\

TP234

TP233

,.

,.. .

.....

..

....

“.

I

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●

TUNER ADJUSTMENTS

● Use a plastic screwdriver for adjustment. . Speaker impedance

8 ohm

●Standard Output

50

mW

●FM MODE switch STEREO

. TUNING : FM : 87.5-108.0 MHZ ( 50 kHz step ), AM: 531 -1701 kl-lz ( 9kHz 5teP )

“M ANTENNA :

Dummy 750hm U

lalance

VTVM

Oscilloscope or

DC voltmeter

flax.
V-curve)

FM ADJUSTM

T

Adjusting

Iep

Circuit

UT

BAND SELECT SWI1

Connections

i

: FM

SG Frequency

Position of tuning dial

I

Adjustment

input

output

connect sweep
generator to

TP 223 (H),
TP 224(G)
(V-curve)

[S-curve: not adj.)
Connect to Digital
DC voltmeter

TP 202 (H),
TP 201 (G)

Connect to VTVM,
Speaker output

Connect to Digital
DC voltmeter
TP 203

,TP204

( not Ground)

:onnect sweep
]enerator to
[P211 (H),
rP212 (G)

k

T2201

98.1 MHz

-----

~

1

IF

2

Detector

3

Tuning

4 Coverage

10.7 MHz

1.2to.lv)

less than

8.5V)

-+H-+-

87.5 MHz

108.0 MHz

-------

...

90.0 MHz

L2102,

L2103

106.0

MHz

CT201

90.0 MHz

~onnectto
rp211 (H),
TP212 (G)

i

5

Tracking

6

Max.

Ovto.osv

106.0 MHz

Zonnect to
rp211 (H),

98.0 MHz
(66 dB)

98.0 MHz

T2202

1-

7

Ov

Vco

8

(19.00kHz)

rP212 (G)

—-—. .

1

-----

98.0 MHz

SVR23

98.0 MHz ..

(66 d8)

Modulation :

OFF

..

Connect to
TP206 (H),

TP207 (G)

19.00 kHz
f 513Hz

-----b-

. CHECKING THE AM BAND

SG MODULATION :1 kHz, So”/o,

IRE LOOP ANTENNA

,.

....

I

VTVM

Connections

SG Frequency

Position of tuning dial

output

Adjusting

Step

Circuit

Adjustment

I

Oscilloscope or

DC voltmeter

Input

Connect sweep “ Connect sweep

generator to
TP 208 (H),

1

450 kHz

999

kHZ

(CF204)

(CF204 :

adjusted)

generalor to

-1_

1

IF

TP 251 (H),

TP 252 (G)

TP 207 (G)

Connect Digital

1

==4 “1-1”5V)

DC voltmeter to

TP 202 (H),

TP 201 (G)

---.---

3

Coverage

----- I (Iessthan

I

8.5V)

I

T

4

Tracking

5

Connect to VTVM,

603 kHz

603 kHz

Speaker output

1404k Hz

1404 kHz

Connect AM SG
to Test Loop

+

-----

-----

1

Checking the

Connectto Digital ]

I

6

SD
(Auto stop
sensitivity)

Connect AM SG
to Test Loop

voltage

2. O-4.OV

(at 85dB tBdB)

DC voltmeter
TP 205 (H).

999kHz

999 kHz

TP 207 (G)

..---

–8–

ii

.-

V

‘APE DECK ADJUSTMENTS

‘REPARATION FOR ADJUSTMENTS

AC; vCXTME T:R

, SCC+E >

1)

2)

3)

4)

5)

6)

7)

8)

9)

I)

pleasuring instruments, tools.

Test tape

MTT-114N (10

kHz)

r;il pill

-.—

TCW-211 (1,500 Hz) (Optional)

MTT-111 (3.000 Hz)
TCC-130 (DOLBY TAPE)
AC-224 (NORMAL)

OEcrrP.C.B

f

AC-5 13 (CrOz)

o

CNO06

o-

“0

L-CH E R-CH

o

Oscilloscope : (At least 10MHZ, dual channel)

TAPE OUT

Digital voltmeter (Input impedance 1MQ or more)
Automatic distortion analyzer or AC voltmeter

(–80dB, input impedance 1MQ or more)
AF-oscillator (400 Hz, 500mV RMS)
Frequency counter (5MHz; or more)

o

Frequency counter, probe.

1

Screwdrivers (non-metallic) for adjustments.

DC digital voltmeter

HEAD REPLACEMENT AND AZIMUTH ADJUSTMENT
A)

1.

2.

3.

4.

B)

1.

2.

3.

4.

c)

1.

2,

3.

4.

5.

6.

Head replacement
After replacement, demagnetize the heads by us­ing a degausser.
Be sure to clean the heads before attempting

to

make any adjustments.

Be sure both channels ( 1 and 2) are the same level

(Using a dual-channel oscilloscope).
All wiring should be returned to the original posi­tion after work is completed.

-..

Phase alignment

Prepare a dual-channel oscilloscope.

Set so that the left and right ranges of the oscillo­scope are the same.

Play the test tape (MTT-1 14N, etc.: 10 kHz).
Adjust so that the waveforms for the left and
right channels are in alignment, as shown in the il­lustration.

TAPE “ A “, “ B “Head azimuth adjustment

Load a test tape in Tape Deck * A “

(MTT-114N, etc.: 10 kHz) for azimuth adjust­ment.

Press the PMY (>) button.

Use a flat-tip (–) screwdriver to turrr the screw
for normal azimuth adjustment so that the left

and right outputs are maximized et the same

phase during playback.

Press the STOP button.

Repeat procedure for tape Deck” B‘.

After completion of the adjustment. use thread-

Iock (TB 1401 B) to secure the azimuth-adjustm-

ent screws.

TAPE “A”

PLAY HEAD

RED

WHITE

FROM CNO09(4P)

BLACK

CONNECTOR

..

....

.-.-- .-

TAPE “B’”

E. HEAD R/P

HEAD

SROWN

WHITE

PINK

YELLOW

RED

ra

f. ~ J

FROM CNO1O(7P)

AT

CONNECTOR

BLUE BLACK

~PLP.. .

TAPE ‘W
AZIMUTH

A

..

:’,

.,. .

...

,.

.’...

. ..

,.-.

..

.;:-..

.:

–9–

ii

.-

*

TAPE DECK ADJUSTMENTS

It)

CHECKING THE MECHANISM TORQUES

1. Clean the head, capstan and pinch roller before making any measurement.

Meawing Item

Take-up torque

Back tendon

Tape tendon

Cassette for PLAY:TW-211

1

PIAY:TW-211 1

Drive-power cassette

measurement F. FWD/REW:lM/2231

TW-2412

PLAY

3@60gr”cm

1.5-4 .5gr*cm

60gr or more

F. FWD/REW

55- 120gr “cm

IU) MOTOR REPLACEMENT AND SPEED ADJUSTMENT

A) Motor replacement

/

u

1. See illustration at right.
Q

Q

o

*A

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B) Motor speed adjustments

1. Make the adjustment near where the test tape

finishes winding.

‘~ T&*p

\\

2. Be sure to make the adjustment of the motor

i

k+

*/

speed only after completion of the high-speed tim-

ing adjustment for tape deck A and tape deck B,

and then making the normal-speed timing adjust-

bfl ‘\

ment

of decks A and B.

‘~ ‘---x 7

...

...

OECK F!C.B

o

CNOOS

o

“o

L-CH E R-CH

o

TAPE OUT

-. —...

❑KOOTED”” -

\“” ~---

HIGH SPEED 21
TEST POINT #n CNO05

f 1

NORMAL SPEED

SHORT

HIGH SPEED

(1)

(2)
(3)

(4)
(5)
(6)

(7)

Insert the test tape (MTT-1 11, etc. 3,000 Hz)
into tape deck A.

Press tape deck A’s PIAY button.
Adjust SVROO1 so that the frequency counter
shows a reading of 3,000Hz.

Press tape deck A’s STOP button.

Insert the test tape into tape deck B.
Press tape deck B’s PLAY button.
Checking the frequency counter shows a reading
of 3,000 Hz (-40, + 70Hz).
Press tape deck B’s STOP button.

(1)

(2)
(3)
(4)
(5)

(6)
(7)

Insert the test tape (TCW–2 11, etc. 1,500 Hz op­tional). into tape deck A.

Prass tape deck A’s PLAY button.
Set to the high-speed condition.
Short-circuit test points CNO05 pins 1 and 2.
Checking the frequency counter reading is 3,000
Hz.

Press tape deck A’s STOP button.
After the completion of the adjustment, remove
the short-circuit between test points CNO05 pins

1 and 2.

–lo–

.-

V

‘APE DECK ADJUSTMENTS

. Make the following adjustments after first cleaning the head assembly and checking the adjustment of

the head azimuth.

f

w

47K 47K

PARTS LOCATION

DECK I?C.B

o

(J

BIAS

SVR504 SVR604

(’-CH); (R-CH)

o

!DQ

REC I PLAY GAIN

SVR603 SVR503

(F?-CH) (L-CH)

1

I

I

Adjustment Item Test tape

DOLBY Meeeurlrrg

Input

output

Adjustment

Adjustment

NR SW. Instrument connection

connection

location

value

TCC-130

(TAPE”A”) SVFM02,

‘a) :?$&@’Jt [DOLBY

OFF

AC-voltmeter

TAPE OUT

SVR602

(CNO06)

(TAPE%”) SVR501,

540mV

TAPE)

SVR601

lb) Recording/

plsybeck

AC-224

OFF

AC-voltmeter VIDEO SVR503,

gain

(NORMAL)

AF-oscillator – 14dB, lkHz

SVR603

O * ldB

adjustment

-.

., .

.- —— ..-

-.. .

k) Recording/

AC-224

AC-voltmeter VIDEO

O * IdBat

playback

(NORMAL)

OFF

SVR504.

AF-oscillator –34dB, 1kHz, 10kHz

lkHz and

frequency

SVR604

10kHz
response
edjuatment

[ ) AMPLIFIER ADJUSTMENTS 5.

A)

1.

2.

B)

1.

2.

3.

4.

Playback output adjustment
TAPE “ A n

- ..

Play the test tape and adjust SVR502 (L-channel)
and SVR602 (R-channel) so that playback output
becomes 540 mV.

TAPE “ B “
Play the test tape and adjust SVR501 (L-channel)
and SVR601 (R-channel) so that playback output
becomes 540 mV.

Recording/playback frequency gain adjustment.

DOLBY NR switch : OFF

Input signal :

– 14dB, 1

kHz.

Tape to be used :

NORMAL (AC-224, etc.)
Introduce input signals to the VIDEO terminals,
and, with the unit in the REC. PAUSE mode, ad­just input level for 3dB out,
Record the input signal.
Press the REWIND button and rewind the tape to
the beginning of the recording just made.
Press the PLAY button.

6.

c)

1.

a)
b)

c)

d)
e)

f)

-11–

Adjust SVR503 (L-channel) and SVR603 (R- chan-

-..’...

.,

net) so that the recording and playback output lev­el differences become * 1dB.

,’.:...-

‘........

Repeat steps (1) to

Recording/playback

ment. “

DOLBY NR switch

NORMAL TAPE

Tape to be used :
Input signal :

(5).

frequency response adjust-

: OFF

NOFWIAL (AC-224)

-34dB, 1kHz, 10 kHz

.....

introduce input signals to the VIDEO terminals.

With the unit in the REC. mode.

Record these input signals {1kHz_

10kHz

— 1kt-fz

—lokJ-tz).
Press the REWIND button and rewind the tape to
the beginning of the recorchg just made.
Press the PLAY button.

Adjust SVR504 (L- cttarwwl) and SVR604 (R­channel) so that the 10 ki-tz and 1 kHz output Iev- . “

.

el differences become * 1dB.
Repeat steps (a) to (e).

ILLUSTRATION OF CD CHANGER MOVEMENT

. This CD changer can accommodate and play up to 5 discs.

a. OPERATION

1.

“ POWER “ ON.

2.

“ FUNCTION “ CD.

3.

“ DISC SELECT “ 1.

4. The sub chassis (27) move$ down.

5. The disc table (82) turns, and the disc 1 table is
brought directly above the mechanism where it
stops.

6, The sub chassis moves up, the disc is chucked, the

turntable (11 -1 ) rotates, the disc’s TOC (table of con­tents) is read, and the turntable then stops.

If a disc has not been intalled, ” no disc “ appears on

the display.

7. When” DISC SKIP” is pressed, steps 4 to 6 are per­formed, and operation advances to the next disc num-

ber.

----,.

,.’

-.

b. NAME AND FUNCTIONS OF MAJOR PARTS

1.

Disc table (82)
Disc number detection slits 1 to-5 and a stop ~e~ec-

tion slit are cut into the outside circumference of the

disc table.

These slits are used by th_ephoto coupler to detact

the disc number, deceleration timing and stop poai-

-..

tion,
Also provided on the circumference of the table

area

stabilizing groove and rotation gear.

DISC

..’

DISC Tft3JE GEAR

LCc~3S}loE

I

PINCH LEVER

Jxsc’ STOP

K% No.

-12-

i

i

.+

●

.LUSTRATION OF CD CHANGER MOVEMEMT

2.

Disc table gear (51 )
This transmits the rotational force of the changew mo­tor assembly (60) to the disc table.

3. Sensor circuit board assembly
This identifies the detection signals from the pfmto
coupler and controls the changer motor.

4. Changer motor
When the motor moves in a clockwise direction. the
resulting power turns the disc table; when it mowes in
a counterclockwise direction, it causes the cam gear
(38), cam pulley (37) to rotate, and it moves the sub
chassis up and down.

5. Chucking detector switch circuit board assemb%
This circuit board is equipped with switches SW2 and
SW3 which are turned ON/OFF by the lock slide 631).
When SW2 is set ON, it means that the upward wno-

tion of the sub chassis is completed or, in other
words, that the disc chucking is completed. Wham
SW3 is SET ON,

it means that the downward motion

of the sub chassis is completed or, in other womls,
that the disc table is set to the rotation standby sta­tus.

- .. .

If?-’‘

LOCK LEVER [

(32)—

0

<-~--.,

CAM

PULLEY (3X$

~,,i,$>

CAM 00S(3S3

\ ~s_/

‘ ,/

‘.-__~

<,

Lb

@

;~#WER MOTOR

. ...

IDLER PULLER

DISC TABLE

(41)

(82)s

/- (”-.

~)

o

“m “-

@ ‘c

o

\

ROTATION

-—. .

GEAR

MOVING GEAJ?(46)

—.—

P

r

SUB CHA&1S(27)

.. .-.

DISC TABLE ROTATION,
CD MECHANISM UP/DOWN

-UP -

:OFF

i{

1
I

1

I

U---H

! 1 , ,
I

I i I

t

SW3

OFF

CHUCKING

CHUCKING

RELEASE

COMPLETED

.

,.,.,...

.-

#

ILLUSTRATION OF CD CHANGER MOVEMEIW

6.

Limit switch (9)

This switch is provided on the CD mechanism (1 U) to

stop the pickup at its precise home position.

The sled motor (12) moves the pickup via the pcsanmr

gear(2), mid gear (3) and rack gear (1-2) which ~*­cured to the pickup. Moving toward the center -m
the outer circumference, the pickup sets the Iimilt
switch ON at the end of the rack gear, opens the ‘CD
main circuit board (91 ) circuit, moves forward f=r

about 10ms and then reverses.

The rack gear which movas in reverse sets the &rmit

switch, OFF, moves forward for about 10ms and
then stops.

c. ILLUSTRATION OF CD PLAYER MOVEMENT

1. The sub chassis (27), which is secured by the CEl
mechanism, is pulled upward at all times by tensaicm

.,

spring” L” (26), and tension spring U R “ (28), and it
is kept in place by the cam puny (37), lock slid, smc.

2. The rotational force of the changer motor is ap@ed
to the moving gear and idler pullyed secured to the
moving lever.
The moving gear performs two differant operations
depending on the direction in which tha canger rrtswor
is rotating.
When the motor is rotating clockwise, the gear
causes the disc table to rotate through the disc table

gear; when it is rotating counterclockwise, it roustes

the cam gear and cam pulley, and jt moves the =b

chassis up and down. At the same time, it activates
the lock Iaver, which is linked to the cam on the bot­tom of the cam gear, and then the lock slide in mm.

. .

L

J

“ON-

““OFF““

FORWARO@-----

SLED MOTOR
ROTATION

‘RET”N)==l k

REVERSE @

. . .

I

I I

Revolution

,., ---

...__ ___

---- -

. .... .. ..

LOC% SLIDE(31)

— ‘1

M

—

-sPR1NG(28)

t

u

,

T.

CAM GE& (38)J

CAM PULLEY(37)

1

- ~~~

SUE tHASSIS (27)

,.

...

–14–

ii

..

*

LLUSTRATION OF CD CHANGER MOVEMENT

CAM

~>>L

1~~

SPRING (26) l~/L~Y cm PULLEY (37)

SUB CHASSIS (27)

3.

&f~~&&-.A.GEAR,~*,

SUB CHASSIS (27)

If the stop number and deceleration/stop signal are in-

put from the side of the rotating disc table, the table
decelerates and stops near the applicable number,
and after the center has risen by means of the pinch
lever (57), the lock slide enters the stop slit where it

is secured.
The pinch lever also measures the back tension of the

table and prevents jogging.

DISC

DISC TASLE GEAR

LOC~3S#E

(51)

I

PINCH LEVER

PINCH LEVER (57)

LOCK SLIDE (31)

TA

103)

DISC STCP

DISC No.

CD PLAYER’S SERVICE MODE

. The service mode can be used to check the CD player.

CD
OPERATION

.—

...

.. ... ...

~----

INTRO SCAN

7

~0 1>/88 (Play/pause)

..— ~

RANDOM PLAY+ I -.

7

EDIT++

I

L

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I

FADE

“%- ‘Ezks’rch)

1

_l:

—.

&hATION

-15-

TUNER
OPERATION

.

.

“, ..

.......

......

:..’.

.:, ,

.-

●

CD PLAYER’S SERVICE MODE

a. THE DISPLAY WHEN THE KEY SWITCH HAS BEEN F%EESSED

(1)

(2)

(3)

(4)

(5)

(6)

Turn the POWER switch to “ ON. “
Switch the unit to the service mode by pressing “%kre
tuner’s” MEMORY” key within one second afmsw
pressing the CD player’s “ MEMORY” key and ftkaa
tuner’s” BAND “ key simultaneously.
When the tuner’s” BAND “ key is pressed, the Uf2D
reads” REC “to indicate that the key input has be?em
registered.
When the tuner’s” MEMORY” key is pressed, @we
LCD, in addition to “ REC “ described in (3) ab~,
also reads” TIMER”.
Thus, as shown in the table below, the characters
and symbols displayed on the LCD increase as lb
corresponding keys are pressed.
To cancel the service mode, press the “ FM/TUP$fE
MODE “ key .

I

KEY BUTTION

I

LCD INDICATED

1

KEY BUTTON

I

LCD INDICATED

(TUNFRI lcn~

I

BAND

REC

MEMORY PROG.

MEMORY

TIMER

REPEAT

FNVTUNEMODE

REPEAT

[To cancel the

PLAYIPAUSE

D

service mode)

TUNING ‘ UP 8 SLEEP

9TllP

TUNING “ DOWN “ CONT

PRESET“ UP w SIDE

A

++

PRESa wDOWN “ SIDE B

(CD) DISC SK

RANDOM PLAY ‘“-

pANnC)M Enlr

INTRO SCAN

INTRO I

I

C)NF

----

1

----

➤>

DISC

I

TRACK

I

I

(IP

I

ALL .,,

I

I rnlr I

.“ . .. -----

I

--, .

I

--, .

I

I 1

I

.——

(DISC”SELECT)

(PROG-tiM)

I

(FUNCTION)

(PROGRAM)

--

TUNER ii

3

3 TAPE

15

4

4

VIDEO

➤

5 5

-._.

-. .-.

b. CHECKING THE MOUNTING OF THE LCD’S PRINTED CIRCUIT BOARD

(1) Turn the POWER switch to “ ON ‘.

(2) Switch the unit to the service mode by pressing the

CD pjayer’s” REPEAT” key within one second after

.-

pressing the CD player’s “ MEMORY “ key and the

tuner’s “ BAND “ key simultaneously.

COMPUTEITflEC,

WIOECLOCI(INTROtiDOM OFFSIOEA

(3) Confirm that one segment of the LCD comes on

SLEEP‘–/-///~/, /-/ /~/ ~~lz 5//-/ /-/./-/ III ~~ZS~~EI

WAKE UP

each time the CD player’s “ REPEAT “ key is

LEVEL/l/@Jk/:/ Is/ LWAM-I1;1Iil:lil /2/ MI PM

TIMER

RECDISC ST TRACK AUTO MONO FAOE TIME EOIT

pressed.

D

(4) To cancel the service mode, press the” FM/TUNE

EjEEi123456789101112131415~i%EiLCONT

MODE” key.

-16-