Sanyo FXD-803LD Manual de usuario

SERVICE MANUAL DIGITAL FULL PANEL

DETACHABLE 4-CHANNEL

SUPER HIGH POWER

FM STEREO/MW/LW RECEIVER

COMPACT DISC PLAYER

FILE NO.

FXD-803LD

(General)

PRODUCT CODE No.

14782801

Specifications

CD SECTION

D/A Convetier ........................................18Bit Twin

Signal to Noise Ratio .............................95dB

Frequency Response, ............................5-20 .000Hz

Harmonic Distortion ..........................0....0.080/0

Wow& Flutter ........................................Not Measurable

FM TUNER SECTION

Frequency Range .....87...........................87.5 108 MHz

Frequency Response,.,.,., ......................5O-l2.5OOHz

IF Rejection ............................................l OOdB

Image Rejection .....................................65dB

Signalto Noise Ratio .............................6OdB

Stereo Separation ..................................3OdB

MW TUNER SECTION

Frequency Range ..................................522- 1,620 KHz

Usable Sensitivity ...................................35dB

Signal to Noise Ratio .............................45dB

LW TUNER SECTION

Frequency Range ..................................l53.28lkHz

Usable Sensitivity ...................................4Odb

Signalto Noise Ratio .............................4Odb

GENERAL

Power supply .........................................DCl4.4V

Ground polarity ......................................Negative(.)

Frequency Response, ............................2O-20.000Hz

Distotiion ................................................O.l Y0

Output Power(MAX),., ............................25Wx4

RMS Power Rating(l%THD) .,...............9.5WX4

Dimensions(WxHxD) ..............................l9Ox57xl86(mm)

Weight ....................................................l.5kg

—Specifications are subject to change without notice

REFERENCE No. SM800012

NOTES REGARDING THE PICKUP (CD SECTION)

(1) Notes for transport and storage

1)The pickup should always be left in its conductive bag

until immediately prior to use.

2) The pickup should never be subjected to external

pressure or impact.

Storage in conductive bag Drop impact

(2) Re~air notes

‘1)

The pickup incorporates astrong magnet, and so should

never be brought close to magnetic materials.

The pickup should always be handled correctly and

carefully, taking care to avoid external pressure and

impact. If it is subjected to strong pressure or impact, the

result may be an operational malfunction and/or damage

to the printed circuit board,

Each and every pickup is already individually adjusted to

ahigh degree of precision, and for that reason the

adjustment point and installation screws should absolutely

never be touched.

Laser beam may damage the eyes!

Absolutely never permit laser beams to enter the eyes!

Also NEVER switch ON the power to the laser output part

(lens, etc.) of the pickup if it is damaged.

Pressure

o“a

Q- %0

Laser Beam

oNEVER look directly at

the laser beam, and don’t

—- Iet contact fingers or other

exposed skin.

Cleaning the lens surface

If there is dust on the lens surface, the dust should be

cleaned away by using an air brush (such as used for

camera lens). The lens is held by adelicate spring.

How to hold the pickup

Iff

\\, e

Conductive Sheet

6) Never attempt to disassemble the pickup.

–2-

NOTES REGARDING COMPACT DISC PLAYER

1) Preparations

Compact disc players incorporate agreat many ICS as

well as the pickup (laser diode). These components are

sensitive to, and easily affected by, static electricity. If

such static electricity is high voltage, components can be

damaged, and for that reason components should be

handled with care.

The pickup is composed of many optical components and

other high-precision components. Care must be taken,

therefore, to avoid repair of storage where the

temperature of humidity is high, where strong magnetism

is present, or where there is excessive dust.

2) Notes for repair

Before replacing acomponent part, first disconnect the

power supply lead wire from the unit.

All equipment, measuring instruments and tools must be

grounded.

The workbench should be covered with aconductive

sheet and grounded.

When removing the laser pickup from its conductive bag,

do not place the pickup on the bag. (This is because there

is the possibility of damage by static electricity.)

REPAIRS (CD SECTION)

To prevent AC leakage, the metal part of the soldering iron

should be grounded.

Workers should be grounded by an arm band (1MS2).

Care should be taken not to permit the laser pickup to

come in contact with clothing, in order to prevent static

electricity changes in the clothing to escape from the arm

band,

The laser beam from the pickup should NEVER be directly

facing the eyes or bare skin.

[Resistor

-(lMfl)

—

Sheet

–3-

-r

--l L..-. -------- ..

—

l-l

‘$

—,

—

I-J

..———

DISASSEMBLY INSTRUCTIONS (CD SECTION)

REMOVING THE PICK UP

1. Remove one spring @from the CD Mechanism F’CB assy

to (Fig. A).

2. Disconnect six lead wires from the CD Mechanism PCB

assy @(Fig. B).

3. Remove the springs SO,I@ (Fig. B).

4. Disconnect two lead wires from the sensor PCB assy (33

(Fig. B).

5. Remove the square belt@ (Fig. B).

6. Remove six machine screws @j (Fig. B).

Tightening torque :2.5Kg

7. Remove the top cover assy.

8. Remove the up lever assy (Fig. C).

9. Remove two springs 63 (Fig. D).

10. Shift the arms @, ~forward (Fig. C).

11. Lift up the pick-up base assy @and remove it from the

damper.

12, Remove two machine screws ‘@~(Fig. D).

.Tightening torque :2Kg

13. Remove the feed plate assy I?4(Fig. D).

14. Remove two machine screws @(Fig. D).

Tightening torque :1 Kg

15. The pick up comes off.

16. Pull off the main pick shaft @(Fig. D).

17. Solder the short pattern on the rear surface of the pick up

(Fig, D).

18. Unlock the connector of the pick up and pull off the pickup

FPC @(Fig. D).

Fig.A

Fig.B

20, Q:J Up lever assy

Fig.C

uFig.D

—

-6-

REMOVING THE LIMIT SWITCH

1. Remove one spring @]from the CD Mechanism PCB assy

@(Fig.E)

2. Disconnect two lead wires (brown, green) from the main

PCB assy @Q(Fig. E).

3. Remove one machine screw@ (Fig. F).

Tightening torque :1,5Kg

4. The limit switch assy @comes off (Fig. F).

REMOVING THE FEED MOTOR ASSY

1, Remove one spring 63 from the CD Mechanism PCB assy

‘@ (Fig. A).

2. Disconnect six lead wires from the CD Mechanism PCB

assy @(Fig. A).

3. Remove the springs (50, $2 (Fig. B).

4, Disconnect two lead wires from the sensor PCB assy @Z

(Fig. B).

5, Remove the square belt (a (Fig. B).

6. Remove six machine screws@ (Fig. B).

Tightening torque :2.5Kg

7. Remove the top cover assy.

8. Remove the up lever assy (Fig. C).

9. Remove two springs@ (Fig. D).

10. Shift the arms (?(I,@]forward (Fig. C).

11. Lift up the pick-up base assy to and remove it from the

damper.

12. Remove one machine screw I@ (Fig. G).

Tightening torque :2Kg

13. The feed motor assy @comes off (Fig. G).

XSteps 1to 11 are the same in the REMOVING THE PICK UP.

Fig.E

Fig.F

“@

Fig.G

–7-

DISASSEMBLY (CD SECTION)

REMOVING THE DISC MOTOR ASSY

10.

11.

12.

13.

14,

15.

16.

Remove one spririg @from the CD Mechanism PCB assy

@(Fig. A).

Disconnect six lead wires from the CD Mechanism PCB

assy @(Fig. A).

Remove the springs @, @(Fig. B).

Disconnect two lead wires from the sensor PCB assy @

(Fig. B),

Remove the square belt @(Fig. B).

Remove six machine screws @(Fig. B).

Tightening torque :2.5Kg

Remove the top cover assy.

Remove the up lever assy (Fig. C).

Remove two springs @(Fig. D).

Shift the arms @, @forward (Fig. D).

Lift up the pick-up base assy @and remove it from the

damper.

Remove the springs @, @(Fig. H).

Open the chuck arm assy @by 90”, then lift it up, and

remove (Fig. H).

Align the holes of the disc table @with the locations of the

machine screws @.

Remove the two machine screws @(Fig. H).

Tightening torque :1.8Kg

Slide and remove the disc motor assy @(Fig. H).

XSteps 1to 11 are the same in the REMOVING THE PICK UP

REMOVING THE LOAD MOTOR ASSY

Remove the square belt @)(Fig.1).

Unsolder the load motor assy @at two places (Fig. J).

Unsolder the leaf switch @at two places (Fig.J).

Remove one machine screw @(Fig. J).

Tightening torque :2.5Kg

Slide and remove the main PCB assy @(Fig. J).

Remove one machine screw @(Fig. K).

Tightening torque :2Kg

The load motor assy @comes off (Fig. K).

Fig.H

Fig.J Fig.K

–8-

REMOVING THE LEAF SWITCH

1. Unsolder the leaf switch@ (Fig, L).

2. Remove the machine screw@ (WU

Tightening torque :1.8Kg

3. The leaf switch @comes off.

-9-

ALIGNMENT PROCEDURES (CD SECTION)

1. NECESSARY EQUIPMENTS FOR ALIGNMENT

0DC power supply :Output OV-20V 1A or more

Tracking power supply xl

Output OV-20V 2A or more

Regular DC power supply xl

@DC volt meter

@Oscilloscope

@Adder amplifier (PART NO. 644006 5456)

@Oscillator

@Test disc (A-BEX TCD-784)

2. BEFORE ALIGNMENT

CD Remove CD Mechanism Control PCB (cD-8 PCB).

@Connect MAIN PCB and CD-8 using the extension cable

(30cm FPC,PART NO. 644006 5463).

CD-8 PCB CN503

Extension Cable

6440065463 ~

6Main PCB

CN602

3. ALIGNMENT

I)FE BIAS ALIGNMENT

Before switching on the power, short TP536 (+5V MAIN)

and TP537 (5VB. UP) using lead wire.

Switch on the power and press RESET switch.

Connect the DC volt meter to TP FEO and TP552

(1/2VCC), and then adjust PT501 until the reading is less

than 0+1 OmV.

Remove the short lead wire.

W552

Vu.%’lm

II) FOCUS GAIN ALIGNMENT

Before switching on the power, remove FEO solder and

connect the Adder Amplifier as shown below.

~~LIGNMENT PART LOCATION

Switch on the power and play the track No.1 of the test

CD.

Connect the oscillator between SG and the ground of the

Adder Amplifier Input the 1.83KHz, -30dB (0.2 Vp-p) sine

save.

Set the oscilloscope to X-Y mode and connect CH1 to X

of the Adder amplifier and CH2 to Y. (Trigger CH1 )

Adjust PT505 (F. GAIN) so that the Lissajous figure can

be as shown below.

II1

After adjustment, short FEO solder.

TOP

‘t /DISC SLOT

t-) 1

1‘T50’‘hd’‘T505J

1LCD Mechanism

Bottom

-1o-

rROUBLESHOOTING (CD SECTION)

Cheak the unit according to the following flowcharl referring to the figures P.24–27.

If disc is loaded,

remove the disc by

rotating the loading

ulle toward ou

r’

Check MAIN PCB

8V REG circuit.

Check MAIN PCB

YCheck CD

~Mechanism PCB,

Check loading motor,

CheckQ504 &IC507. Replace IC505. Check’

pattern.

CheckCDMechanism

Hg.1k2appearsatTP52?(SEN$1) ~SENSPCB.

CheckSENS1&2,

YCheckD505.

~CheckMAINPCBACC

circuit,

ITv

I I J“ (

mIReplace Q505. I

wII

-11–

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