Sanyo FXD-685GD User manual

Service Manual

Full Panel Detachable

High Power

FM/AM Stereo

Receiver

Compact Disc Player

FXD-680GD

114782877

FXD-685GD

114782878

SEL

FM/MW/LW CD RECEIVER 45W x 4 CD-R&RW

FXD-680GD

SEL

FM/MW/LW CD RECEIVER 45W x 4 CD-R&RW

FXD-685GD

Contents

SERVICE NOTE AND PRECATIONS............................................................................................................................................................................... 2

OPERATION CHECK ....................................................................................................................................................................................................... 5

ALIGNMENT LOCATIONS................................................................................................................................................................................................ 6

ELECTRICAL ADJUSTMENTS......................................................................................................................................................................................... 7

BLOCK DIAGRAM .......................................................................................................................................................................................................... 18

IC/TRANSISTOR LEAD IDENTIFICATION..................................................................................................................................................................... 20

CD MECHANISM EXPLODED VIEW ............................................................................................................................................................................. 21

CABINET & CHASSIS EXPLODED VIEW ...................................................................................................................................................................... 22

PART LIST – CD MECHANISM...................................................................................................................................................................................... 23

PART LIST CABINET, CHASS AND ACCESSORY ....................................................................................................................................................... 25

PART LIST MAIN............................................................................................................................................................................................................ 27

PART LIST KEY.............................................................................................................................................................................................................. 30

PART LIST CD SERVO .................................................................................................................................................................................................. 31

PART LIST REMOTE...................................................................................................................................................................................................... 33

PART LIST JB/GIB.......................................................................................................................................................................................................... 34

SCHEMATIC DIAGRAM ................................................................................................................................................................................................. 35

CIRCUIT BOARD DIAGRAM .......................................................................................................................................................................................... 39

REFERENCE No. SM-06

0

00

03

FILE NO.

1

SPECIFICATIONS

FM TUNER

Frequency Range ...................................................................................... FM 87.5 - 108.0 MHz (50 KHz Step)

Sensitivity.......................................................................................................................... FM 3 µV (S/N=30 dB)

Stereo Separating (FM) ..............................................................................................................30 dB (at 1kHz)

Signal to noise ratio (FM).........................................................................................................Better than 50 dB

AM TUNER

Frequency Range .......................................................................................... MW 522 - 1620 kHz (9 KHz Step)

Sensitivity.....................................................................................................................MW 32 dBµ (S/N=20 dB)

Signal to Noise Radio ............................................................................................................... More than 45 dB

LW TUNER

Frequency Range ...................................................................................................................LW 144 - 288 kHz

Sensitivity......................................................................................................................LW 35 dBµ (S/N=20 dB)

CD PLAYER

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

Signal to Noise Radio ............................................................................................................... More than 65 dB

Channel Separation .................................................................................................................. More than 60 dB

T. H. D.......................................................................................................................................Less than 0.30%

AUDIO AMPLIFIER & GENERAL

Output Power........................................................................................................................................4 X 45 W

Speaker Output Impedance.......................................................................................................................4 ohm

Power Source ........................................................................................................... DC 12V, Negative ground.

Specifications are subject to change without notice.

2

SERVICE NOTES AND PRECAUTIONS:

Service notes:

1. Make sure that the power lead is connected properly to

Power source, otherwise damage to radio may result. If a

Battery, eliminator is used as a power source in place of a

Battery, it must be filtered and regulated. (The power sup-

ply capacity should be more than 5 amps).

2. Integrated circuits (ICs) are used in this unit. Because the

ICs are direct-coupled devices, as to all electronic equip-

ment, reading within 10% of the indicated values are acc-

eptable. Allowance must also be made for variations in

supply voltage. It is expected that any breakdown within

the IC results in drastic changes of the operating voltages

at the terminals.

3. When replacing a power output IC, remember to use the

IC specified in the parts list; Coat the IC-fin with silicon

grease.

WARNING

In using meters, signal generator and any tool in servicing

ICs, extreme care is needed.

DO NOT SHORT THE IC TERMINALS TO THE PATTERN

ON THE PC BOARD OR TO EACH OTHER. THE IC WILL

BE INSTANTANEOUSLY DESTROYED.

Adjustment procedure:

Alignment is performed at factory with laboratory equipment.

Therefore, before alignment is attempted, the unit should be

thoroughly checked for circuit troubles.

Notes:

1. Check for specified source voltage-DC, 14.4 volts.

2. Connect an AC voltmeter (AC VM) across speaker or

dummy load (4 ohms. 20W, wire wound resistor)….see

fig. 1-3. (ELECTRICAL ADJUSTMENTS).

3. Signal input must be kept as low as possible to avoid

overload and clipping (use highest sensitivity of output

indicator).

4. Repeat adjustment to ensure good results.

5. Non-metallic alignment tools, must be used (especially

at FM alignment).

6. for alignment location details, refer to CIRCUIT BOARD

PARTS LOCATIONS

Installation procedure:

1. To prevent a short circuit, remove the key from the ignition

and disconnect the battery.

2. Make the proper input and output wire connections for

each unit.

3. Connect the wiring harness wires in the following order:

ground, sealers, battery, ignition.

4. Connect the wiring harness connector to the unit.

5. Install the unit in your car.

6. Reconnect the battery.

7. Disentails by reversing the installation procedure.

CAUTION

● The rear-panel which also heat sink is very hot. Don’t

burn!!

● If your car’s ignition does not have an ACC position,

connect the ignition wires to a power source that can

be turned on and off with the ignition key. If you connect

the ignition wire to a power source with a connect voltage

supply, as with battery wire the battery may die.

● If the console has a lid, make sure to install the unit so

that the cover will not hit the lid when closing and open-

ing.

● If the fuse blows, first make sure the wires aren’t touch-

ing to case a short circuit, then replace the old fuse with

one with the same rating.

● Do not let unconnected wires or terminals touch metal

on the car or anything else conducting electricity. To

prevent a short circuit, do not remove the caps on the

ends of the unconnected wires or the terminals.

● Connect the speaker wires correctly to the terminals to

which they correspond. The unit may be damaged or

fair to work if you share the wires or ground them to

any metal part in the car.

● After the unit is installed, check whether the brake lamps,

blinkers, wipers, etc. On the car are working properly.

● Insulate unconnected wires vinyl tape or other similar

material.

3

SERVICE NOTES AND PRECAUTIONS

LASER BEAM SAFETY PRECAUTIONS

NOTES FOR TRANSPORT AND STORAGE

1. The pickup should always be kept in its conductive bag

until use.

2. The pickup should never be subjected to external pres-

sure or impact.

REPAIR NOTES

1. The pickup incorporates a strong magnet, and so should

never be brought close to magnetic materials.

NG

Magnet

NG

2. The pickup should always be handled correctly and care-

fully, 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.

3. Each and every pickup is already individually adjusted to

a high degree of precision, and for that reason the adjust-

ment point and installation screws should be absolutely

never be touched.

4. 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.

Laser Beam

NEVER look directly at the

laser, and do not let contact

fingers of other exposed

skin.

NG

5. 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 one used for

camera lens). The lens is held by a delicate spring.

Conductive Sheet

6. Never attempt to disassemble the pickup.

Storage in conductive bag Drop impact

GOOD

Pressure

4

SERVICE NOTE AND PRECATUTIONS

Static Electricity

The CD pickup might suffer destruction by static electricity during spare-parts maintenance or replacement, although it is stable

when connected to the circuit in the CD unit. The destruction might caused because the laser diode terminal will be electrically

open. To prevent the terminal from being open, do the following steps.

1. When you replace the CD pickup, or remove the CD unit from the car stereo unit for any maintenance purpose, solder the

copper foil pattern indicated in Fig. 1 below to short-circuit the connector PCB and flexible wire of the CD unit. Perform your

intended maintenance work with the flexible wire short-circuited.

2. If the original CD pickup may possibly be reused, make a short circuit in the area indicated in Fig. 2 first. Then remove the

pickup and perform the work.

3. The CD pickup OPTIMA-725C2, which is supplied as one of the spare parts, is already short-circuited with the copper foil

pattern pre-soldered indicated in Fig. 2 below. To handle this CD pickup, keep the short circuit as it is. Then attach the pickup

to the unit and connect the flexible wire to the connector.

4. After performing the work, eliminate the short circuit by removing the solder at its respective short-circuited area described in

1, 2 and 3 above.

5. Insert a CD. If the E-01 or E-02 error should appear on the display on the face plate, check the area mentioned in 4 above,

where the short circuit may not have been eliminated.

6. Note that the semi-fixed VR equipped with the CD pickupOPTIMA-725C2 must not be turned. You can’t make any

Adjustment to the semi-fixed VR, which is completely adjusted when shipped at the factory.

FIG.1

Fig. 2

5

OPERATION CHECK

GENERAL SPECIFICATIONS OF SIGNAL

Standard frequency

Signal output

Modulation

FM

MW

LW

FM

MW

LW

MW

FM Stereo

98.1 MHz (87.5, 108 MHz)

1000 kHz (522, 1620 kHz)

200 kHz (144, 288 kHz)

1 mV

5 mV

400 Hz 30% MOD.

1 kHz 75 kHz DEV.

90% for L only or

R only pilot level 10%

AF output level FM/MW/LW

Power source voltage DC 14.0V (Backup voltage is the same as this)

AF load impedance 4 ohm pure resistance

Balance Center position of level

Tone Center position

The signal strength read in this section is voltage on the antenna.

Test Diagram

FL.

SPK.

FR.

SPE.

BACK UP (14.4V)

GROUND

POWER ANTANNA

MPX

STEREOS

MODULATOR

FM SG

AM SG

DUMMY

ANTANNA

VTVM

DISTORTION

METER

ACC (DV14.4V)

SPK.

RR.

SPR.

RL.

MAIN UNIT

4−SPEAKER 4−SPEAKER

2−SPEAKER

FRONT

SPK.

FRONT

2−SPEAKER

ANT

6

ALIGNMENT LOCATIONS

FM TUNER

7

ALIGNMENT PROCEDURES

FM ADJUSTMENT

Equipment Required

z AM IF/RF signal generator

z Solid-state voltmeter (SSVM)

z Regulated DC power supply

z 2-CH voltmeter

z Distortion meter

FM Alignment Using FM Signal Generator

Note: Press the radio power switch to on the radio. Signal generator output must be kept as low as possible

to avoid overload and clipping.

Step Generator

Coupling

Generator Display

Setting

Adjustment Remarks

Stereo

Separation

Signal

Generator

to antenna

receptacle

98.1 MHz

Int. 1 kHz

Dev. 75 kHz

L+R = 90 %

pilot = 10 %

98.1 MHz

VR1

Adjust AF

output power

at maximum

separating

more than 30 dB

FM SNC

Adjustment

98.1 MHz

Dev. 75 kHz

L+R=90 %

Int. 1 kHz

60dBµV output

98.1 MHz

@ 40 dBµ

98.1 MHz

VR2

Stereo Separation

25 dB (±5 dB)

STOP

SENS.

Signal Generator

to antenna

receptacle

98.1 MHz

Mod. 1kHz

Dev 75kHz

98.1 MHz

VR3

Adjust AF to

stop station.

Note: The tuner module is well-adjust and adjustment is not recommended.

8

RADIO OPERATION FOR FXD-680GD, FXD685GD

SEL

FM/MW/LW CD RECEIVER 45W x 4 CD-R&RW

2

7

6

8

54

3

1

FXD-680GD

SEL

FM/MW/LW CD RECEIVER 45W x 4 CD-R&RW

2

7

6

8

54

3

1

FXD-685GD

SWITCHING TO RADIO MODE…………………….…1

Press SOURCE button 1 to select radio mode, the radio mode appears in the display together with the memory

band and frequency.

SELECTING THE FREQUENCY BAND……………..2

At radio mode, press BAND/LOUD button 2 shortly to select the desired band.

The reception band will change in the following order:

FM1 FM2 FM3 MW LW

RADIO TUNING…………………………………………3

Press the TUN/TRK or button 3 shortly to activate automatic seek function. Press for several seconds

until “MANUAL” appears on the display, the manual tuning mode is selected. If both buttons have not pressed for

several seconds, it will revert to seek tuning mode and “AUTO” appeared on the display.

AUTOMATIC MEMORY

STORING & PROGRAM SCANNING…………………4

- Automatic memory storing

Press P.SCAN/AST button 4 for several seconds, the radio searches for 6 strongest stations and stores them

into the presets of the currently selected band.

- Program scanning

Press P.SCAN/AST button 4 shortly to scan preset station. When the field strength level is more than the

threshold level of stop level, the radio is holding at that preset number for several seconds with release mute,

then searches again.

STORING PRESET STATIONS .................................5

The preset buttons 5 can be used to store 6 stations in each band (FM 1, FM 2, FM 3 and MW, LW) for convenient

access to your favorite stations.

9

• Programming stations ..... 1. Select the desired band, then tune in the station you want to store in memory.

2. Press and hold one of the preset buttons 5 for more than 2 seconds until the

corresponding preset button number appears. Repeat steps 1. and 2. to program

additional stations.

• Quick tuning .................….... Select the desired band, then press one of the six preset buttons 5.

LOCAL/DISTANT SELECTION ...........................…..6

Press LOC button 6 to set local or distant stations.

Use local position (LOCAL/LOC appears on the display) for reception of strong station, and distant position (DX

appears on the display) for reception of weaker stations. This function is effective during AUTO SEEK operation.

MONO/STEREO SELECTION .......................….…...7

Press MONO button 7 to select mono or stereo mode. You can sometimes improve reception of distant stations by

selecting mono operation.

FREQUENCY SCAN OPERATION.......................….8

Press F.SCAN button 8 to set the function to frequency scan mode, which scans stations and stop for several

seconds at each receivable signal. Press F.SCAN button again to stop scanning.

10

CD OPERATION FOR FXD-680GD, FXD-685GD

SEL

FM/MW/LW CD RECEIVER 45W x 4 CD-R&RW

34567

8

2

1

FXD-680GD

SEL

FM/MW/LW CD RECEIVER 45W x 4 CD-R&RW

34567

8

2

1

FXD-685GD

LOADING AND EJECTING THE CD………………1,8

Insert a disc into the CD slot 1 and the CD player will start.

The system remains in CD mode and “

” appears in the display.

Press the eject button 8 to eject a disc.

SWITCHING TO CD MODE.......................................2

Press the SOURCE button 2 with the power on to switch from radio mode or AUX mode to CD mode.

When the CD mode is switched on while a disc is loaded, play resumes from the point at which play was stopped.

When the entire disc has played, the unit returns to the first track and play resumes.

SKIPPING TRACKS .............................................…3

Press the TUN/TRK button to skip to the beginning of the next track.

Press the TUN/TRK

button to skip to the beginning of the previous track.

Press and hold the TUN/TRK

or TUN/TRK button 3 for several seconds to search quickly (with sound) in

the forward or reverse direction.

When the button is released, the CD resumes normal play.

Notes:

PLACING THE CD IN PAUSE MODE ......................4

While playing a CD, press the PAU button 4.

To resume playing, press the PAU button 4 again.

• You can play CD-Rs or CD-RWs (rewritable CDs) on this unit in proper condition.

• Some CD-Rs/CD-RWs (depending on the equipment used for its recording or the

condition of the disc) may not play on this unit.

• You cannot play CD-R/CD-RW that is not finalized. (A finalize process necessary for a

11

Notes

REPEAT MODE ........................................................... 6

Press the RPT button 6 to play the current track repeatedly.

To cancel this mode, press the RPT button 6 again.

SHUFFLE MODE.......................................................... 7

This function plays the tracks on a CD in random order.

Press the SHF button 7 to begin shuffle play.

To cancel this mode, press the SHF button 7 again.

SCAN MODE (PLAYING THE BEGINNING

OF EACH TRACK) ....................................................... 5

This function plays the first several seconds of each track sequentially.

Press the SCN button 5 to begin the scan mode.

To cancel this mode, press the SCN button 5 again.

• During playback of a CD, the CD running indicator spins.

• The unit will turn-on automatically when a CD is inserted if the ignition switch is “ON”.

12

AUX MODE OPERATION FOR FXD-680GD

SEL

FM/MW/LW CD RECEIVER 45W x 4 CD-R&RW

1

SWITCHING TO AUX MODE.......................................1

The unit has a pair of auxiliary input terminals (see WIRING figure on page 18). This allows you to listen to an

auxiliary audio source (MP3, portable cassette player, etc).

Press the SOURCE button 1 with the power on to switch from radio mode or CD mode to AUX mode.

13

CD CHANGER OPERATION FOR FXD-685GD

SEL

FM/MW/LW CD RECEIVER 45W x 4 CD-R&RW

23456

7

8

1

SWITCHING TO CD MODE.......................................1

Press the SOURCE button 1 with the power on to select CDC mode.

When the CDC mode is switched on, playback begins with the first CD that the CD changer detects.

SKIPPING TRACKS ...............................................…2

Press the TUN/TRK to skip to the beginning of the next track.

Press the TUN/TRK

button to skip to the beginning of the previous track.

Press and hold the TUN/TRK

or TUN/TRK for several seconds to search quickly (with sound) in the

forward or reverse direction.

When the button is released, the CD resumes normal play.

PLACING THE CD IN PAUSE MODE ....................... 3

While playing a CD, press the PAU button 3.

To resume playing, press the PAU button 3 again.

SCAN MODE (PLAYING THE BEGINNING

OF TRACKS OR DISCS) ........................................... 4

This function plays the first several seconds of each track or disc sequentially.

• Playing the beginning of tracks (Track Scan)

Press the SCN button 4 to play the first several seconds of each track on the current disc in order.

• Playing the beginning of disc (Disc Scan)

Press and hold the SCN button 4 for several seconds to play the first several seconds of each disc in the

magazine.

To cancel the track scan or disc scan mode, press SCN button 4 again.

REPEAT MODE .......................................................... 5

• Repeat tracks

Press the RPT button 5 to play the current track repeatedly.

• Repeat discs

Press and hold the RPT button 5 for several seconds to play the current disc repeatedly.

To cancel the track repeat or disc repeat mode, press the RPT button 5 again.

14

SHUFFLE MODE......................................................... 6

This function plays the tracks on one CD or all CDs in the magazine in random order.

• “Shuffle-playing” tracks

Press the SHF button 6 to play the current disc in random order.

• “Shuffle-playing” discs

Press and hold the SHF button 6 for several seconds. The system selects a disc at random and plays all tracks

on that disc. When all tracks have been played, the next disc is selected and “Shuffle-playing” is repeated.

To cancel the track shuffle or disc shuffle mode, press the SHF button 6 again.

SELECTING A DISC................................................ 7,8

Press the DISC – button 7 to select the preceding disc.

Press the DISC + button 8 to select the next disc.

Note

• Use with only SANYO CD Changer.

15

REMOTE CONTROL (OPTIONAL) FOR FXD-680GD, FXD-685GD

POWER VOL

TUN/TRK

VOL

LOUD AST

PAU SCN RPT

SHF

1

5

3

6

4

9

10

15

13

2

7

8

11

14

12

1.POWER

2. AUDIO

3. VOL

4. VOL

5. SOURCE

6. TUN/TRK

7. TUN/TR

K

9. BAND/LOUD

10.PAU

11.SCN

12.RPT

13.SHF

14.SOUND

15.1~6 Preset buttons

16

HINTS FOR PROPER AND SAFE OPERATION

• Condensation

Moisture can condense on the optical lens of the CD player during humid or rainy days, or after the car heater is

turned on. If this occurs the disc player may not function properly. To remedy the situation, remove the disc from

the unit and wait approximately one hour. This should allow the moisture to evaporate and restore normal

operation.

• Temperature Consideration

The unit may not operate correctly in extremely hot or cold temperatures. Avoid exposing the unit to extremely

high or low temperatures.

• Interruptions in the sound (skipping)

When the car is driven on very rough surfaces, the sound from the CD player may skip and be interrupted. This

will not cause any damage to the disc or the player. If this occurs, wait for the road surface to improve before

using the CD player.

• Safety

For safer driving, keep the volume at a moderate level to enable you to hear outside sounds (such as

emergency vehicle sirens).

• Cleaning the unit

Clean the unit with a soft, dry cloth. Stains should be removed by wiping the surfaces with a soft cloth immersed

in lukewarm water and wrung dry. Never use strong chemicals or solvents. These will damage the finish of the

unit.

• Disc care

When not using the disc player for extended periods, remove the compact disc and return it to the plastic

storage case. Do not leave a disc partially ejected from the player. If an ejected disc remains in the loading slot

for approximately 10 seconds, the player will reload the disc to prevent damage.

• Servicing

Should a problem develop, do not open the unit or try to repair it yourself. If servicing is required, bring the unit to a

Sanyo Authorized Service Center.

17

ELECTRICAL ADJUSTMENTS

DUMMY BOX SCHEMATIC

● AM DUMMY ANTENNA

● FM DUMMY ANTENNA

18

BLOCK DIAGRAM FOR FXD-680GD

19

BLOCK DIAGRAM FOR FXD-685GD

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