Sanyo Dc dji User manual

Service Manual

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Specifications

Tuner Section

iii

Compact Disc Audio DC DJI (GENERAL)

Component System with

Wireless Remote Control 7

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PRODUCT CODENo,

13234060

DECK Secllon

FM Motor ...................,,,............0...,........... DC motor (DECK 1and DECK 2)

-FW+fGflGlQ8 received,,,,..,.,g,,.,,,,,,,,,,,,,,,,,,,,t,,,,,,,,t, 07,50 ~108.00 MHZ Head ,,,.,!,!!!,,,,.,.O.1,,,,,.. !..,..., .....0..,,,.,,..,.,,0!,,., Hi-B hard permalloy head

IHPprttllcalswtslllvlty(mono),,,,.,.............................. 343IJV/16.Sfl dBf [DECK 1riayback head, DECK 2recording head)

S/N ratio ...................................................... 65 dB (mono, 60 dBf input)

Harmonic distortion ....,.,,....0.!.. .................,,.......!.. 0.1 %(mono, 1kHz)

Stereo separation ,,,.....0.....,,,,. 0,..................,,,..,..0,,,,!.!..... 35 dB (1 kHz)

Image frequency interference ratio ............................................. 38 dB

Frequencies received ................................................... 531 N1602 kHz

Pratical sensitivity (included antenna) .................................. 809 lJV/m

SIN ratio ,,..,.!.!,,...........,,,,.,,!,,..,.,., ,,,..,,.,,,,.,!,....,.,.,,.,,,,!,,,.... ,,,....... 50 dB

Image frequency interference ratio .,.,,,,,......,,,,,. !..................,.,.!. 40 dB

Soloctlvlty ....!.......................o!.........................#.....$.....................$.. 38 dB

IF interference rallo ...................................................................... 65 dB

Amplifier SectIon

output power (Front) ,,, ,,s .,, . !!,,,,.,, ..,0 .,.. ,., . . . . . . . . , ..,!..... 50 W(T.H.D 10%)

Music Dower (Front) ................................................. 80 W(T.H.D 10 %)

Inpuf sensitivity/impedance

PHONO ....................................................................... 3.0 mV/50 kCl

DATNCR ........................,..,,.....!...,.., .,,.,s,,,...,.,,... .......

AUX 180 mV/50k(l

............................................,,,,!.,,. ,,.,,...$,............. 180mV/50kfl

,,. .

.“,\Speclllcaliona and deelgn are subject to change without notice.

,,.

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,,, ,, !

,..,’...

. .Ferrite head (DECK 2erasing head)

Fast-forward/rewind time ........................ Approx. 110 sec. (C-60 tape)

Tracks .,,,.,,!.,...,,,0.,,,,.,,,..,.,,,, !..,.,,,,,,,.,...,,,..,.. 4-lrack, 2-channel slereo

S/N ralio (playback) ....................!.......,,.,...,., ................................ 50 dB

Frequency response ................................. 413HZ -16 kHz (metal taPe)

Wow and flutter ............................................................. 0.08 %(WRMS)

CD Playar Section

Frequency response ..................................................... 20 Hz -20 kHz

Harmonic dlslorlion ...................................... Less than 0.04 %(1 kHz)

S/N ralio ..............,,,,.,.,.,.,,, ........................................................!...95 dB

Wow and flutter ............................................. Below measurable limits

optical pickup .................................................................. 3-beam laser

Error correction .......0..,..,,,, ............................................................ CIRC

Sampling frequency ....................,......................................,.0,.. 44.1 kHz

D/A conversion ...............................................0.....,.,!,.!,..... 16-bit linear

Filter .................................................................................... Digitalfilter

General

power requirements .......................... AC: ~~Ol12?1220124;v, 50/60 HZ

Power consumption ....................,..,.,...!....,,,. ,.,...,, ,..,!,................. 260 W

12imenslona (WXHXD) ,,,,,,,,,,,,,,, t,,,.,,,,,,,.,,,,,,,,,,,,.,,,,,,,,, 360x455x320 mm

Weight (apptox.) .“

. .......................................#..,.’i.,,,#.,....,.............

REFERENCE No. WM-570193

12.9 kQ

,,, .,

CONTENTS

Safety Certification ,J..~~f~ ~:gg.~*q g**.~!!l L!! !~!,!,,,,, ,,f,ttc!lp ,,!, tt o,,, ,,, ,, . . . .

CD PiaY6r Disassembly Procedures .................$, .,... . . . . . . . . . . . . . . . . ,., ,.,.’, ::.:

Removing the Disc Tray ,,, ,,.,, ,,, ,0,,, .,, .,,., ,., ..,.. ,. .,.0.. 0.......,0...,.0. ...

Removin~the Mechan~sm ,. .,0.,. ,, .,,.0. ., ..,.., .$

N6te for Assembling Disc Tray ..... ...... ..... .......

CD Player Block Diagram ,, ..0..,. ....................

CD Player Adjustment Points ...........................

CD Player Adjustment Procedures ......................

Before Checking or Adjusting CD Player ...............

. . . . . . . . . . 6....................

. . . ...0.. .....................0

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

....................0 ...,,.. . . . .

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

......0. .......................

Checking Focu{ErrorSignal .................................................

Free Run Frequency Adjustment . . .......

... !.... . ..0..0. ...................................

Setting of Initial Position of Volume ,., ,., ,. ,0 .,..,. ., ..,... ,,, ,, ... .,0, . . . . ,. ...,., . . .

Focus Offset Adjustment . . ., ..0... . . . . . . . . .. 0,.,.. .0 .0.... . . . . . . . . ., . . ...0 .. ......0.

Tracking Offset Adjustment ... ..,.. ,, .,,.,. . . . . . . . . . . . . . . . . . . . . . . . . ,. 0,.0.. .........

Linear Motor Offset Adjustment ,., ..,.. . . . . . . . . . . . . . . . . . . . . . . . . . . ...0.. .......... 000.

E/F Balance Adjustment ....................................,0 ...,,,. ,., ,. ,0., ......

Adjustment of Focus/Tracking Gain ., .,.... . . . . . . . . . . . . . . . . .,0 .....0..,.... . . . . . . . . . . .

Focus Gain Adjustment ... .,,.,, ., .0,.,,, ., .,,,.,, ., . . ...0. 0.,..,... . . . . . . . . . . . . . . . .

Tracking Gain Adjustment . ...,,,.,. , ...4,..., ,...,,,,0, 0.?, .,,,4, ,, .,,,.,,. . . . . . . . .

Kick Gain Adjustment ,, .,...0,. .00.,0..,. ,, .,,,,,,. , ..,.,,,.. ,,, ,,4, ,,, ,, ...4..... .

Confirming Jitter . . . . . . . . . . . . . . . . . . . . . . . . . . . ,. .,,.,,, . . . . . . . . . .. 0.,..,, .,, . .. s., 0..

Adjustment of Turntabie Height ., ,0,..., .. 0...0., . . . . . . . . . .,, ,, .,,. $. .......,. .,,,.0.

Diffraction Grid Adjustment ,. ..,... ,., ,. .,. . . . . . . . . . . . . . . . . . . . . . . . . . ..!.... .........

Diffraction Grid Adjustment .....................................................0.. .

7’

,, l!.,~

CD Player Mechanism Exploded View& Parts List ....0..,. . . . . . . . . . . . . . . . . . . .,, ,, .,.. ,.. .#. 10

Block Diagram (Main Unit Section) ................... ...0. ,, .0.... ...................... 11

System Block Diagram (Function Section) ... . . . . . ,, ..,,.. . . . . . . . . .. 0.0... 0,.,,00. .! 0.0... 12

M-COM (LC6554H)System Biock Diagram ., ..,..0. .0 .,.0.., . . .. s.,., ....................0 13

Caution on RFAdjustment . . . . . . . . . . . . . . . . . . . . ,, ..,,,.., . . . ...0... .....................14

System Ciock Adjustment ., .,,,,,, . . . . . . . . . ,,, .,,.., ,. .,..,,0 .........., .,,,,,0 Os0,... 14

FM Tuner Ailgnment ....................................... ,0.,.. ,, ..,..00 ...........14

AM Tuner Alignment . . . . . . . . . . . . . . . . . . . ..,, ,. .,,,,, .,, ..,,.,, s,, ,,, ...................15

Cassette Deck Eiectricai Adjustment . . . . . . . . . O* .,...,. ,. .,,..,, ., .,,,.,, ., .,.,,., 0,, ..,.. 16

Before Adjustment ................................................................16

Measuring instruments Required ,, ...,.. .............................................16

Switch Positions . . . . . . . . . . . . . . . . ,,, .,.., . . . . . . . . . . . . . . . . ,, .,..,. . . . . . . . . . . . . . . . . ,. 16

Normai Tape Speed Adjustment ,., ,,, ,. . . . . . . . . . . . . . . . . ,. ..,.,0 .,, .,0.. . . . . . . . . .0 .,.. 16

High Speed Tape Speed Adjustment ,., ,, .,.. ,, .0,..,. .,, ,,, ... ... ,,, ,., . . . . . . . . . . . . . .

Head Azimuth Adjustment . . . . . . . . . . . ... ..,..0 . . . . . . . . . ,., .,,.,. ., .,0..,, ..........0 ;:

Piayback Sensitivity Adjustment ............................,., ,. .0.. .................17

FL Meter Sensitivity Adjustment ,,, ..,,,, ,, ..,,.,, . . . . . . . . . ,,, ,, . . . . ... .*,,.. .........17 ..,, ‘:,

Recording Bias Level Adjustment (Deck2) .,,

......................,..0. ................0. .17 ‘“-””-’’””’i’

Cabinet Exploded View &Parts List 18 “,.

,0,,...00 .0, .,...0 .,0 ...,.... . . . . . . . . . 0. . . .. $0. .0 . . ...0

Cassette Deck Mechanism Expioded View &Parts List ‘I

. . ...0... .,, ,., ..,. . . ...0... ............21

P.C.Board Parts List ,,.

. . . . . . . . ... ,., ,. 0...,... . . . . . . . . . ...0... . . ...0.. . ........ ....... ..23

P.C.Board Parts List ,,

,. .,,.,. . . . . . . . . ,, .,,,., ,. .0.... ... ...0, ,. ..0..0 ......0. . ....... ..28

Wiring Diagram (CD Piayer Section) . .,,.,,,,, .......... ,0 .,,..... . .,,0,,,,, ,,, .00...,0 . . 51

Wiring Diagram (Power Main Section) . . . . . . . . . . . . . . . . . . . . . . . . ,. .,..,, . . . . . . . . ,,, ..,., ,,, 52

Wiring Diagram (Main Unit Section) ....................................0... .............53

Schematic Diagram (Tuner Section) ......................................................55

Schematic Diagram (Deck/Function/Front Controi Section) ...................................57

Schematic Diagram (Deck/Function Section) ...................0 ..,,.,. . . . . ...0. ...... ....59

Schematic Diagram (CD Piayer Section) . . . ... . . . 0...0...’. .. ’0....., ....... ....... ........ .61

Schematic Diagram (Main Power Section) .:

..................0,, .,,.,, . . . . . . . . . ,,, ,. .,... . . 63 0

iC Block Diagram ,., ,, .,. ,,, ,,, ,! ,,, ,,, !* ,,,~~,f, ,,tt f,,,, :,~~t,,~ ,,, ,,, ,, ,,, ,. .,. ,,, , 64

IC &Transistor Lead Identltlcat{ori ,.,4,,,.,., . . . . . . . . . . 0. .,,,,..., 4. . ...*.... C** S* .4.**. .79

–2–

SAFETY CERTIFICATION

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‘&[lFWavelength:755-815 nm(25”C)

LaserOutput:ContinuousWavemax.0,5mW

CAUTION -USE OF CONTROLS OR ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE SPECIFIED

HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.

THE UNIT SHOULD NOT BE ADJUSTED OH REPAIRED BY ANYONE EXCEPT CWALIFIED SERVICE PEF190NNEL,

BEFORE USE

CD PLAYER SECTION

Using aflat-blade screwdriver, turn the transport fixing screw on the

bottom panel about 90° clockwise

●When transporting the unit again, such as when moving, remove

the disc then turn the fixing screw about 90° counterclockwise.

+“&~

b) Fixingscrew

oL.

c) Bottompanel

–3–

Cl) PLAYER DISASSEMBLY PROCEDURES

REMOVING THE DISC TRAY REMOVING THE MECHANISM

1, Apply Power Switch to the set and press the OPEN/CLOSE 1. Take out the four screws (1 N4in the diagram below) with

button to open the Disc Tray. which the mechaniam is mounted in place and remove the

2. Apply OFFthe Power Switch while the Disc Tray is open, and mechanism.

push the Disc Tray back in by hand to close it.

Push

3. Pull out the Disc Tray by hand to open it again. The Disc Tray

will disengage easily and come out smoothly.

4. Now remove the Disc Tray from the cabinet while pressing

the tab in the direction of the arrow in the diagram below.

Disc Tray

Front

NOTE FOR ASSEMBLING DISC TRAY

1. Place the Disc Tray lever as illustrated and assemble the

disc tray.

Disc Tray

Table load lever

ing the lever in the

ction of the arrow

Bottom View

Pull out

,..ti’

–4–

CD PLAYER BLOCK DIAGRAM

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CD PLAYER ADJUSTMENT POINTS

TP5

‘;’ &~Tp4

IC114

i38D-3604

1°

0X102

TP160 L

TP1O

TP2O

IC102 HI

;CN13

TP7 LC7860N

IC105II!

LA6462D ~

TP1O

IC112

LA8393S

CN106 IC113

T102 ~u NJU74HCU04D

OscCoil

uTP170 ❑

“&!@lII XX% ‘@c4~~:J:

mull

Iclll

pPc4570HA

Pto4

Ill OTP11

Icl 15

NJM7806A

IC108

LA651O

TRACKING

GAIN

1:;: ,

TE :CN15

LA9200NM

WW6

OTO OWW4 WW50 o0

NW1 WW3 WW7

4‘it’ ‘:;

P301

FOCUS OTP3 I

Ic109

LA6500

Ic107 :

OTP14 LA651O .Altj

+.5

CN1l--” BCN7 @MJ

=:❑❑c“’ OFFsE’

TOfl%PcN1ocN’

@0,

F&O~sRFFilter

OFFSET

–5–

CD PLAYER ADJUSTMENT PROCEDURES

BEFORE CHECKING OR ADJUSTING CD

PLAYER

1. Procedures for all adjustments for the CD player from atart

to finish are described below.

2. The pick-up does not have to be adjusted if everything has

been checked and no problems were found.

CHECKING FOCUS ERROR SIGNAL

The effectiveness of the pick-up is determined by checking its fo-

cus error signal. This must be checked before any repairs are

performed on the CD player.

1. Apply Power Switch to the set and press the STOP button.

2. Short test terminal (CN15) TOFF pin to GND to turn the

tracking servo OFF.

3. Connect the oscilloscope to test point TP12 (focus

error) pinandto GND.

(Set the time at 0.5 Sec/DIV.)

4. Press the OPEN/CLOSE button, place the test disc on

the table load, and then press the OPEN/CLOSE but-

ton once again.

5. Once the disc is set, awaveform like that shown in

the illustration below will be repeated three times.

Check that the p-p voltage of this waveform is the

same above and below the horizontal axis at 3V.

Repeated three times

------~----w---+-------------------

(Measured with aMemory Scope)

-4

Ov ---- -“” ---7----

iv ●p-p voitage of 3V

●+and – voltage roughly same

Press the OPEN/CLOSE button repeatedly to pull out

and Insert the disc until the waveform appears each

time the disc is inserted and removed.

If the resuits of the above procedure are not satis-

factory, the pick-up is damaged.

FREE RUN FREQUENCY ADJUSTMENT

1. Connect the frequency counter to VCO test terminal

(CN5) PCK test pin and to GND, (Use a10:1 probe.)

2. Short the test point TP4 (OSC ON) pin to GND.

3. Apply Power Switch to the set and press the STOP

button.

4. Adjust the OSC coil T102 using aplastic screwdriver

until the frequency counter indicator reads

4.3218 MHz+ 1OHZ.

SETTING OF INITIAL POSITION OF VOLUME

1. Set the variable resistors to the initial positions listed

below:

P101 (FOCUS OFFSET) ................. Mechanical Center

PI02 (E/F BALANCE) .................... Mechanical Center

P103 (TRACKING OFFSET) ........... Mechanical Center

P104 (TRACKING GAIN) .. At the position of 45° in the

clockwise from the Mechanical Center

P105 (KICK GAIN) ......................... Mechanical Center

P106 (LINEAR MOTOR OFFSET) .. Mechanical Center

P301 (FOCUS GAIN) ......... At the position of 45° in the

clockwise from the Mechanical Center

FOCUS OFFSET ADJUSTMENT

1, Apply Power Switch to the set and press the STOP button,

2. Connect aDC Voltmeter to the test terminal (CNI 1) F(fo-

cus coil) pin and short the test terminal (CN5) FOCS pin

to GND.

3. In this condition check that the DC Voltmeter indicator is

in the range –0.5Vt50mV, and adjust PIOI if it Is not. ,1

TRACKING OFFSET ADJUSTMENT

1. Appiy Power Switch to the set and press the STOP button.

2. Connect aDC Voltmeter to the test terminal (CN11) T

(tracking coii) pin and short the test point TP1l (T-OF) pin

to GND.

3. in this condition check that the DC Voltmeter indicator is

in the range 100mV~50mV, and adjust P103 if it is not.

NOTE:

Perform this adjustment once again after adjusting the

E/F BALANCE and TRACKING GAIN signals.

LINEAR MOTOR OFFSET ADJUSTMENT

1. Apply Power Switch to the set and press the STOP button.

2. Connect aDC Voltmeter to the test terminal (CN7) LIN-

EAR MOTOR pin.

3. in this condition check that the DC Voltmeter indicator is

in the range OVk100mV, and adjust P106 if it is not.

E/F BALANCEADJUSTMENT

1. Place the test disc (Modern Wave II) on the table load,

and play the fourth item on the disc. Short the test point

TP2 (TEST) pin to GND, and test terminal (CN15) TOFF

pin to GND to turn tracking servo OFF.

2, Connect aDC Voitmeter and an oscilloscope via the low-

pass, filter like that shown in the illustration below to the

test terminal (CN15) TE (tracking error) pin.

6No~6N’ )#

Measurement circuit

3. Adjust P102 so that the DC Voltmeter reading is

OVA15mV (oscilloscope waveform is symmetric to +and j

–about the zero level).

–6–

CD PLAYER ADJUSTMENT

, .,:.”......,’

. .. .. . . .. .,,.

., :,.::;.,.’..

,,. ,

. . . ... .,

PROCEDURES (Continued)

ADJUSTMENT OF FOCUS/TRACKING GAIN 1. Use IC TA7256P or an equivalent product.

The measurement circuit diagramed below must be used in 2. Short the interval between IN and SG, apply 1kHz, lVP-P

order to adjust focus gain and tracking gain correctly. from SG, and adjust variabie resistor 2kf2-B so that the

OUT output is minimum.

18K 10K S6 signal

— —

Main P.C.B. ~

PICK UP +

Measurement circuit

II Generator

L10K 0.047

T’

10K

0,047

10K 0,047

10K

0.047

Dualtrace

Oscilloscope

FOCUS GAIN ADJUSTMENT”

1. Apply P301 to the position of 45° in the clockwise from the

center position, and place the test disc (Modern Wave

II) on the tabie load.

2. Connect the measurement tool described in the last sec-

tion to focus coil pin (CN12).

3. Apply Power Switch to the set and PLAY the first item on

the test disc. Now apply asignal of 900Hz and 0.5VP-P

from the signal generator to the measurement circuit.

4. Set the oscilloscope to X-Y operation, and while observ-

ing the Iissajous waveform adjust P301 to the point where

the phase difference Is 90° as shown In Fig. 1below.

TRACKING GAIN ADJUSTMENT

Apply P104 to the position of 45° in the clockwise from the

center position, and place the test disc (Modern Wave

B) on the table load.

Connect the measurement tool described in the last sec-

tion to the tracking coil pin CN12.

Apply Power Switch to the set and PLAY the first item on

the test disc. Now appiy asignal of 1600Hz and 0.5VP-P

from the signal generator to the measurement circuit.

Set the oscilloscope to X-Y operation, and while observ-

ing the Iissajous waveform adjust P104 to the point where

the phaae difference Is 90° as shown in Fig. 1above.

NOTE:

If these two adjustments are performed, the TRACKiNG

OFFSET must talw be adjusted,

Fig. 1

–7–

KICK GAIN ADJUSTMENT

CD PLAYER ADJUSTMENT PROCEDURES (Continued)

Place the test disc (Modern Wave II) on the table load.

Set the oscilloscope to NORMAL TRIG., set the EXT.

TRIG. pin to external trigger, and input the trigger from

test point TP1O (THLD) pin to the oscilloscope.

Next connect test point TP14 (HF) pin to Channel 1of the

oscilloscope, and connect test terminal (CN15) TE pin to

Channel 2.

Apply Power Switch to the set and PLAY the first item on

the test disc, and the press the PAUSE button. Now ob-

serve the waveforms for HF and TE with triggers applied

from test point TPIO (THLD) pin. At this point, adjust P105

so that akick pulse waveform of about 1to 1.5 tracks as

shown in Fig. 2below is obtained.

O- Tracking Error Out

-HF waveform

LAdjustment must be performed

so curve section in Fig, 2appears.

Fig. 2

CONFIRMING JITTER

If no jitter counter is available, this check does not have to be

have to be performed.

1, PLAY the fourth item on the test disc (Modern Wave II).

2. Connect an oscilloscope to the test point TP14 (HF) pin,

and check that its level is in the range 1.8Vp-p -3.3Vp-p,

3. Connect ajitter counter to test terminal (CN5) EFM pin,

and check that the 3T jitter value is less than 20ns.

(Window width: 600ns -850ns, Set Level: 2.5V)

4. Now PLAY the tenth item on the test disc and check that

the jitter value is less than 20ns again.

ADJUSTMENT OF TURNTABLE HEIGHT

This adjustment must be performed when the Spindle Motor

is replaced.

1, The turntable should be mounted so that its upper surface

Is 13,75 mmk0.lmm above the surface of the chassis,

-%+73.75..

Chassis +

It- Spindle

Motor

Place the test disc (Modern Wave II) on the turntable.

Connect aDC Voltmeter and an oscilloscope via the low-

pass filter shown below to test terminal (CN1l) F(focus

coil) pin.

22K

‘T’”’’k;:::

Measurement circuit

Apply Power Switch to the set and PLAY the first item on

the disc.

If the DC Voltmeter reading is not in the ranges OV&O.2V

for inner tracks and OV+-O.35V for outer tracks, then the

turntable height must be readjusted. Raise the turntable

higher if the DC Voltmeter indicator is on the plus (+)

side, and lower it if it is on the minus (–) side.

(With this circuit lV represents movement of approxi-

mately 0.55mm -0.65mm.)

DIFFRACTION GRID ADJUSTMENT

This set uses athree-beam laser pick-up system. Adjusting

the diffraction grid means adjustment so that beams Eand F

are in position with respect to the main beam as shown in the

diagram below on the bit streams.

The adjustment procedure involves arranging the three

beams in astraight line along the same bit stream and then

adjusting them to specified positions.

The adjustment steps are detailed below. These are very

adjustments so great care should be exercised in this.

–8–

line

CD PLAYER ADJUSTMENT PROCEDURES (Continued)

DIFFRACTION GRID ADJUSTMENT

Apply Power Switch to the set and press the STOP button.

Short test point TP2 (TEST) pinto the GND, and then ehort

)est terminal (CN15) TOFF pin to GND to turn the tracking

servo OFF.

In this state, connect the E-beam output of test terminal

(CN15) to Channel 1of the oscilloscope and F-beam out-

put of test terminal (CN15) to Channel 2, and now observe

the Iissajous waveform on the oscilloscope.

Place the test disc YEDS7 on the table load, and press the

PLAY button.

When the disc begins to rotate awaveform will appear

on the oscilloscope. While observing this waveform,

move the Linear Motor in the direction of the arrow by

hand to send the pick-up to the outer edge.

ection of

k-up motion

When the pick-up approaches the outer edge, the wave-

form on the oscilloscope will suddenly disappear, and if

it is now pushed further outwards there will be points at

which waveforms will appear again. These locations are

the multiburst signal storage locations, If the disc rotates

at high speed at this time, perform this step once again.

Set the oscilloscope to X-Y operation to bring up the

waveforms. Insert the adjustment tool in the diffraction

grating adjustment hole on the pick-up, and rotate the

adjustment tool to right and left. The waveform should be

almost astraight line with aphase difference of 0° as

shown in Fig. 3below. This indicates that the beams are

arranged in one straight line. The waveform in Fig. 4in-

dicates that the beams are not arranged along the same

stream.

Fig. 3Fig. 4

—

NOTE:

It is important to turn the adjustment tool only alittle at a

time. If It Is rotated too far, the beams will be pushed over

into neighboring streams.

10.

Jig

Next, when the waveform in Fig. 3is obtained, turn the

adjustment tool clockwise from that position at which the

waveform in Fig. 3appeared and adjust so that the

waveform is astraight line with aphase difference of

180°. (See Fig. 5)

Fig. 5

Once the state indicated by the waveform in Fig. 5is ob-

tained, hold the STOP button down temporarily, and re-

move the connection between test point TP2 (TEST) pin

and the GND as well as that between test terminal (CN15)

TOFF pin and GND.

Next, press the PLAY button, and set the oscilloscope in

the DUAL MODE so that both Eand Foutputs can be seen.

Set the DISPLAY TIME to 51JS.Now, adjustment is com-

plete if the waveforms shown below In Fig. 6(Channel 1

trigger) are obtained.

Approximately

~E-beam waveform

~F-beam waveform

Fig. 6

NOTE:

Diffraction grating adjustment is performed for asingie

pick-up, so if the following checks are performed adjust-

ment is unnecessary.

a, PLAY the fourth item on the test disc (Modern Wave

HCA35-1045, Toshiba-EMl), turn the tracking servo

OFF, and check that the waveform is linear with a

phase difference of 180°.

b, Next, apply tracking servo, and if the waveforms

shown in Fig. 6are obtained then adjustment Is un-

necessary.

9–

CD PLAYER MECHANISM EXPLODED VIEW& PARTS LIST

Ref.

Nn. Part No. Description Q’ty

Isa) 1in 04L4

6200626200

6201834871

6201834888

6200304290

6201834864

6200514316

6200816069

6201216448

6201834895

6201226324

6201230116

6201243321

6201264104

6201334104

6200153843

6200304108

6200832878

6201884258

6201849592

6201171280

6201192223

6201216493

6201229738

6201243437

6201243444

6201243628

6201849905

6201250145

6201251005

6201279597

6201279603

6201286816

6201295993

6201319835

6201334241

6201360769

6201380088

6201392043

6201394672

6201843026

6201926606

6201926613

4110990701

4110207700

4110208004

4110210601

4110306403

4110999407

4110210304

4110210908

4110310905

4120260108

4120248700

4110158903

Wire Band

Pick-up Assy 88 BS

Holder Bobbin Assy

Bobbin Assy

Spindle Motor (Spindle) [M101]

Holder Sensor Assy

Screw 3X1O

Chassis Assy

York Center

York Side Assy

Screw Washer

Set Screw V-Cone 2X4

Cushion

Turntable

Shaft Pick-up

Leaf Switch (Open/Close) [SW101]

Motor (Lid/Pick-up) [M102]

Gear Rack Assy

Table Load

Table CD Aasy

Chassis (Load)

Holder Disc

York Magnet

Screw, Bind Hd, Tapping-B, +M3.0X8

Cushion Rubber

Cushion Flap

Pad Disc (Felt)

Cushion Table Load

Washer

Gear Pulley

Gear Pinion

Belt

Flap Disc Cramp

Lever Table Load

Shaft Damper

Guide Table Load

Spring Damper

Spring Flap

Spring Table CD

Magnet Disc Clamp

Pad Disc Hold

Pad Damper

SCR PAN PCS 1.7X3

SCR S-TPG BRZ 3X6

SCR S-TPG BRZ 3X8

SCR S-TPG BIN 2X5

SCR BIN 2X5

SCR S-TPG BRZ 2.6X8

SCR S-TPG BIN 2X4

SCR S-TPG BIN 2X6

SCR BIN 2.6X4

SPECIAL SCREW

RING E2

57-Q

&-23

NOTES:

1! Parts order must contain Model Number, Part Number and De-

scription.

2. Ordering quantity of screws and resistors must be multiple of 10

pcs.

–lo–

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