JVC RC BM5 Service Manual

SERVICE MANUAL

CD PORTABLE SYSTEM

RC-BM5

Area suffix

RC-BM5

A ------------------------------- Australia US --------------------------- Singapore UJ -------------------------- U.S.Military

Contents

Safety precautions Preventing static electricity Important for laser products Disassembly method Adjustment method Trouble shooting

1-2 1-3 1-4 1-5 1-16 1-19

Flow of functional operation until TOC read Maintenance of laser pickup Replacement of laser pickup Description of major ICs Wiring connections

1-20 1-21 1-21 1-22 1-36,37

No.21132

Feb. 2003

RC-BM5

1. This design of this product contains special hardware and many circuits and components specially for safety purposes. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Services should be performed by qualified personnel only.

2. Alterations of the design or circuitry of the product should not be made. Any design alterations of the product should not be made. Any design alterations or additions will void the manufacturer`s warranty and will further relieve the manufacture of responsibility for personal injury or property damage resulting therefrom.

3. Many electrical and mechanical parts in the products have special safety-related characteristics. These

characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in the Parts List of Service Manual. Electrical components having such features are identified by shading on the schematics and by ( ) on the Parts List in the Service Manual. The use of a substitute replacement which does not have the same safety characteristics as the recommended replacement parts shown in the Parts List of Service Manual may create shock, fire, or other hazards.

4. The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the like to be separated from live parts, high temperature parts, moving parts and/or sharp edges for the prevention of electric shock and fire hazard. When service is required, the original lead routing and dress should be observed, and it should be confirmed that they have been returned to normal, after re-assembling.

5. Leakage currnet check (Electrical shock hazard testing) After re-assembling the product, always perform an isolation check on the exposed metal parts of the product (antenna terminals, knobs, metal cabinet, screw heads, headphone jack, control shafts, etc.) to be sure the product is safe to operate without danger of electrical shock. Do not use a line isolation transformer during this check.

Plug the AC line cord directly into the AC outlet. Using a "Leakage Current Tester", measure the leakage current from each exposed metal parts of the cabinet, particularly any exposed metal part having a return path to the chassis, to a known good earth ground. Any leakage current must not exceed 0.5mA AC (r.m.s.).

Alternate check method Plug the AC line cord directly into the AC outlet. Use an AC voltmeter having, 1,000 ohms per volt or more sensitivity in the following manner. Connect a 1,500 10W resistor paralleled by a 0.15 F AC-type capacitor between an exposed metal part and a known good earth ground. Measure the AC voltage across the resistor with the AC voltmeter. Move the resistor connection to each exposed metal part, particularly any exposed metal part having a return path to the chassis, and meausre the AC voltage across the resistor. Now, reverse the plug in the AC outlet and repeat each measurement. Voltage measured any must not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5 mA AC (r.m.s.).

0.15 F AC TYPE

1500 10W

Good earth ground

AC VOLTMETER (Having 1000 ohms/volts, or more sensitivity)

Place this probe on each exposed metal part.

!

1. This equipment has been designed and manufactured to meet international safety standards.

2. It is the legal responsibility of the repairer to ensure that these safety standards are maintained.

3. Repairs must be made in accordance with the relevant safety standards.

4. It is essential that safety critical components are replaced by approved parts.

5. If mains voltage selector is provided, check setting for local voltage.

Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of preforming repair of this system.

In regard with component parts appearing on the silk-screen printed side (parts side) of the PWB diagrams, the parts that are printed over with black such as the resistor ( ), diode ( ) and ICP ( ) or identified by the " " mark nearby are critical for safety. (This regulation does not correspond to J and C version.)

1-2

RC-BM5

Preventing static electricity

1. Grounding to prevent damage by static electricity

Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.

2. About the earth processing for the destruction prevention by static electricity

Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as CD players. Be careful to use proper grounding in the area where repairs are being performed.

2-1 Ground the workbench

Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the traverse unit (optical pickup) on it.

2-2 Ground yourself

Use an anti-static wrist strap to release any static electricity built up in your body.

(caption) Anti-static wrist strap

Conductive material (conductive sheet) or iron plate

3. Handling the optical pickup

1.

In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical pickup are shorted. After replacement, return the shorted parts to their original condition. (Refer to the text.)

2.

Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power source can easily destroy the laser diode.

4. Handling the traverse unit (optical pickup)

1.

Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit.

2.

Remove solder of the short land on the flexible wire after replacing the optical pickup. For specific details, refer to the replacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too long a time when attaching it to the connector.

3.

Handle the flexible wire carefully as it may break when subjected to strong force.

4.

It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.

5. Attention when traverse unit is decomposed

*Please refer to "Disassembly method" in the text for the CD pickup unit.

Apply solder to the short land before the card wire is disconnected from the connector on the main board. (If the flexible wire is disconnected without applying solder, the CD pickup may be destroyed by static electricity.) In the assembly, be sure to remove solder from the short land after connecting the card wire.

Short land

CD/Cassette mechanism assembly

Main board

CD pickup unit

Card wire

1-3

RC-BM5

Important for laser products

1.CLASS 1 LASER PRODUCT

2.DANGER : Invisible laser radiation when open and inter

lock failed or defeated. Avoid direct exposure to beam.

3.CAUTION : There are no serviceable parts inside the Laser Unit. Do not disassemble the Laser Unit. Replace the complete Laser Unit if it malfunctions.

4.CAUTION : The compact disc player uses invisible laserradiation and is equipped with safety switches whichprevent emission of radiation when the drawer is open and the safety interlocks have failed or are de feated. It is dangerous to defeat the safety switches.

VARNING : Osynlig laserstrålning när denna del är öppnad

och spårren är urkopplad. Betrakta ej strålen.

VARO : Avattaessa ja suojalukitus ohitettaessa olet

alttiina näkymättömälle lasersäteilylle.Älä katso säteeseen.

5.CAUTION : If safety switches malfunction, the laser is able to function.

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

CAUTION

!

Please use enough caution not to see the beam directly or touch it in case of an adjustment or operation check.

ADVARSEL : Usynlig laserstråling ved åbning , når

sikkerhedsafbrydere er ude af funktion. Undgåudsættelse for stråling. ADVARSEL : Usynlig laserstråling ved åpning,når

sikkerhetsbryteren er avslott. unngå utsettelse

for stråling.

REPRODUCTION AND POSITION OF LABELS

CLASS 1

LASER PRODUCT

1-4

Disassembly method

RC-BM5

Removing the handle (See Fig. 1.)

Lift the handle slightly.

1.

While pressing the claws a of the rear cabinet

2. assembly in the direction of the arrow 1, slide the handle in the direction of the arrow 2.

Removing the front cabinet assembly and rear cabinet assembly

(See Figs. 2 to 5.)

1.

Remove the eight screws A retaining the front cabinet and rear cabinet assemblies from the rear of the main body. (See Fig.2.)

2.

Open the cassette door. (See Fig.3.)

3.

Remove the two screws B retaining the front cabinet assembly. (See Fig.3.)

4.

Slide the lower part of the front cabinet slightly in the direction of the arrow 1. (See Fig.4.)

5.

While removing the front cabinet assembly from the cassette knobs and remove it in the upward direction 2. (See Fig.4.)

Handle

Claw aClaw a

2

Fig.1

1

Rear cabinet assembly

1

AA

Rear cabinet assembly

AA

Fig.2

B

6.

Disconnect the speaker wire from the connector CN205 on the phone jack board. (See Fig.5.)

7.

Disconnect the parallel wire from the connector CN302 on the main board. (See Fig.5.)

CN205

CN302

Phone jack board

Main board

Fig.5

Front cabinet assembly Cassette door

Fig.3

Front cabinet assembly

2

1

Fig.4

Cassette knobs

1-5

RC-BM5

Prior to performing the following procedures, remove the front cabinet assembly from the rear cabinet assembly.

Removing the display board

(See Fig. 6.)

From the inside of the front cabinet assembly, remove the eight screws C retaining the display board and then take out the display board.

Removing the right and left main

speaker assemblies (See Fig. 7.)

1.

From the inside of the front cabinet assembly, remove the six screws D retaining the right and left main speaker assemblies.

2.

Remove the solders from the soldered sections b and c of the right and left main speaker assemblies, remove the wires.

3.

Take out the right and left main speaker assemblies.

Display board

Front cabinet assembly

Right main speaker

C

Front cabinet assembly

Fig.6

Left sub speaker

C

Soldered sections e

EE

DD

CC

Left main speaker

DD

[Note]

After assembly, apply a locking agent to the screws D.

Removing the right and left sub

speaker assemblies (See Fig. 7.)

1.

From the inside of the front cabinet assembly, remove the four screws E retaining the right and left sub speaker assemblies.

2.

Remove the solders from the soldered sections d and e of the right and left sub speaker assemblies, remove the wires.

3.

Take out the right and left sub speaker assemblies.

[Note]

After assembly, apply a locking agent to the screws E.

Removing the cassette door damper

(See Fig. 8.)

1.2.From the inside of the front cabinet assembly, remove the two screws F retaining the bracket of the cassette door damper.

Soldered section b

Right sub speaker

Front cabinet assembly

EE

Soldered sections d

Fig.7

F

Soldered section c

Take out the cassette door damper.

[Note]

1-6

After assembly, apply a locking agent to the screws F.

Cassette door damper Bracket

F

Fig.8

Removing the cassette door

(See Fig. 9.)

1.

Open the cassette.

2.

While pressing the claws f on the left and right of the cassette door bracket, slide the cassette door.

3.

Disengage the hooks g and h on the left and right of the cassette door bracket, and remove the cassette door.

Removing the cassette door bracket

(See Figs. 10 and 11.)

1.

While pressing the sections i on the left and right of the cassette door bracket in the direction of the arrow 1, remove the cassette door bracket from the bosses j of the front cabinet assembly and then open the cassette door bracket in the direction of the arrow 2. (See Fig.10.)

Section i

RC-BM5

Cassette door bracket

Cassette door

Hook h

Claw f

Hook g

Fig.9

Section i

11

2.

Press the section k of the cassette door bracket and remove the cassette door bracket from the boss m of the front cabinet assembly. (See Fig.11.)

3.

Disengage the section n of the cassette door bracket from the boss p of the front cabinet assembly and remove the cassette door bracket.

(See Fig.11.)

[Note]

Be sure to hang the spring to the section q before attaching the cassette door bracket. (See Fig.11.)

Boss j

Section n

Boss p

Spring

Section q

2

Fig.10

Fig.11

Boss j

Cassette door bracket

Section k

Boss m

Cassette door bracket

1-7

RC-BM5

Prior to performing the following procedures, remove the front cabinet assembly from the rear cabinet assembly.

Removing the volume switch board

(See Figs. 12 and 13.)

1.

Disconnect the wire from the connector H402 on the volume switch board. (See Fig.12.)

2.

Remove the four screws G retaining the control bracket of the volume switch board. (See Fig.12.)

3.

While pressing the power and volume buttons of the volume switch board, take out the volume switch board.

4.

From the forward side of the volume switch board, remove the five screws H retaining the volume switch board to the control bracket. (See Fig.13.)

5.

From the bottom side of the control bracket, remove the two screws J retaining the volume switch board and volume button to the control bracket. (See Fig.13.)

Volume switch board

Control bracket

G

Control bracket

H

Volume switch board

GG

H402

Fig.12

Volume button

H

J

(Bottom side)

Removing the power amplifier board

and phone jack board (See Fig. 14.)

1.

Remove the tie band bundling the wires from the main board.

2.

Disconnect the wire from the connector CN206 on the power amplifier board.

3.

Disconnect the wire from the connector CN801 on the main board.

4.

Remove the wire from the soldered section r on the power amplifier board.

5.

Remove the two screws K and board holders (A)/(B) retaining the power amplifier board.

6.

Remove the two screws L retaining the phone jack board.

Soldered section r

Phone jack board

L K

Board holder (A)

Notch s

Board holder (B)

CN206

Fig.13

Tie band

K

Fig.14

H

Main board

CN801

Power amplifier board

Notch t

7.

Pull out the power amplifier board from notches s and t, and then take out the power amplifier board together the phone jack board.

1-8

RC-BM5

Removing the power transformer

(See Fig. 15.)

1.2.Remove the tie band bundling the wires from the power transformer and battery plate.

Remove the wire from the soldered section u on the power amplifier board.

[Reference]

3.

Remove the wire(blue) from the soldered section v of the battery plate.

4.

Remove the two screws M retaining the power transformer.

5.

Remove the two screws N retaining the AC jack.

6.

From the bottom side of the rear cabinet assembly, remove the label and then remove the two screws P retaining the voltage selector switch.

7.

Take out the power transformer together the AC jack and voltage selector switch.

It is not necessary to remove the wire(black) from the battery plate.

(Except for A version)

Tie band

Wire(blue)

Soldered section u

AC jack

Wire(black)

Power transformer

Soldered section v

N

Nut

Put a mark here.

Nut

[Caution]

Voltage selector switch

P P

[Caution]

Label

AC220-230V

Make sure direction is correct.

Fig.15

Front side

AC110-127V

M

VOLTAGE SELECTOR

[Caution]

Before removing the voltage selector switch, put a mark on the voltage selector switch as shown in Fig.15. When reinstalling, attach the voltage selector switch in the same position as marked before removing. When affixing a label, make sure it is in the correct direction.

[Note]

After assembly, apply a locking agent to the screws M, N and nuts.

Removing the tuner board

(See Figs. 16 and 17.)

1.

Remove the wire from the connector H801 on the tuner board. (See Fig.16.)

2.

Remove the two screws Q and board holders (B) retaining the tuner board. (See Fig.16.)

3.

Pull out the tuner board from the notches w and x of the rear cabinet assembly. (See Fig.16.)

H801

Board holder (B)

Notch w

Notch x

Tuner board

Board holder (B)

Q

Fig.16

4.

Remove the FM antenna wire from the soldered section y on the reverse side of the tuner board.

(See Fig.17.)

Soldered section y

Tuner board (Reverse side)

Fig.17

1-9

RC-BM5

Removing the cassette deck

mechanism assembly and cassette board (See Figs. 18 and 19.)

1.

Remove the three screws R and screw R' retaining the cassette deck mechanism assembly.

(See Fig.18.)

Cassette deck mechanism assembly

Wire clamp

2.

Lift the cassette deck mechanism assembly slightly and move it as shown in Fig.19.

3.

Remove the three screws S retaining the cassette board. (See Fig.19.)

4.

Lift the cassette board slightly, remove the capstan motor wire and REC/PB head wire from the soldered sections z and aa on the cassette board. (See Fig.19.)

5.

From the forward side of the cassette board, disconnect the wire from the connector CN602 and then remove the cassette deck mechanism assembly. (See Fig.19.)

6.

From the forward side of the cassette board, disconnect the wire from the connector H602 and then remove the cassette board. (See Fig.19.)

[Notes]

When attaching the screw R', attach the wire clamp at the same time.

(See Fig.18.) After assembly, apply a locking agent to the screws R and R'. (See Fig.18.)

Cassette deck mechanism assembly

S

CN602 (Forward side)

Fig.18

H602 (Forward side)

S

R'

RR

Soldered section aa

S

Cassette board

Soldered section z

1-10

Fig.19

RC-BM5

Removing the CD/Cassette mechanism

assembly

(See Figs. 12,14,16 and 20 to 22.)

[Reference]

1.

From the back side of the rear cabinet assembly, remove the two screws T retaining the CD/Cassette mechanism assembly. (See Fig.20.)

2.

Disconnect the wire from the connector H402 on the volume switch board. (See Fig.12.)

3.

Disconnect the wire from the connector CN206 on the power amplifier board. (See Fig.14.)

4.

Disconnect the wire from the connector CN801 on the main board. (See Fig.14.)

5.

Disconnect the wire from the connector H801 on the tuner board. (See Fig.16.)

6.

Remove the four screws U retaining the CD/Cassette mechanism assembly. (See Fig.21.)

It is not necessary to remove the cassette deck mechanism assembly from the rear cabinet assembly.

Rear cabinet assembly

T

Fig.20

7.

Slide the CD/Cassette mechanism assembly in the direction of the arrow and take out it. (See Fig.22.)

UU

CD/Cassette mechanism assembly

Fig.21

Rear cabinet assembly

CD/Cassette mechanism assembly

Fig.22

1-11

RC-BM5

Removing the main board

(See Figs. 23 to 25.)

[Caution]

1.

From the bottom side of the CD/Cassette mechanism assembly, remove the screw V retaining the main board. (See Fig.23.)

2.

Disconnect the wire from the connector H602 on the cassette board. (See Fig.23.)

3.

Disconnect the wire from the connector H302 on the main board. (See Fig.24.)

4.

From the top side of the CD/Cassette mechanism assembly, remove the three screws W and screw

W' retaining the main board. (See Fig.24.)

[Note]

5.

Remove the main board from the CD/Cassette mechanism assembly, lift the CD/Cassette mechanism assembly as shown in Fig.25.

6.

Disconnect the wire from the connector H502 on the main board. (See Fig.25.)

7.

Apply solder to the short land section ab on the CD pickup unit. (See Fig.25.)

[Caution]

When removing the main board, be careful not to scratch or damage the CD door.

When attaching the screw W', attach the wire clamp at the same time.

Be sure to solder the short land section ab on the CD pickup unit before disconnecting the card wire from the CD pickup unit. (See Fig.25.) If the card wire is disconnected without applying solder, the CD pickup may be destroyed by static electricity.

Main board

W

CD/Cassette mechanism assembly

V

H602Cassette board

Fig.23

Fig.24

Main board

CD/Cassette mechanism assembly

Wire clamp

W'

W

H302

CD pickup unit

8.After soldering, disconnect the card wire from the CD pickup unit and then remove the main board.

(See Fig.25.)

[Caution]

1-12

In the assembly, be sure to remove solder from the short land section ab on the CD pickup unit after connecting the card wire.

Short land section ab

Card wire

H502

Fig.25

RC-BM5

Removing the main board (See Fig. 26.)

Prior to performing the following procedures, remove the main board from the CD/Cassette mechanism assembly.

From the bottom side of the CD/Cassette mechanism assembly, remove the four screws X retaining the CD mechanism assembly.

[Note]

When attaching the CD mechanism assembly, be sure not to mistake the positions of the pink and orange rubbers.

Removing the CD door switch board

(See Fig. 27.)

From the bottom side of the CD/Cassette mechanism assembly, remove the screw Y retaining the CD door switch board.

Removing the hanger and CD door

button (See Fig. 27.)

1.

From the bottom side of the CD/Cassette mechanism assembly, loosen the screw Z of the spring plate holding the hanger and then move the spring plate in the direction of the arrow 1.

2.

While pressing the claws ac of the hanger in the direction of the arrow 2, remove the hanger from the CD tray assembly.

3.

Press the claws ad of the CD open knob in the direction of the arrow 3 and then take out the CD open knob from the top side of the CD tray assembly.

[Note]

After assembly, apply a locking agent to the screw Z.

Removing the CD door damper

(See Fig. 27.)

1.2.From the bottom side of the CD/Cassette mechanism assembly, remove the two screws AA retaining the CD door damper holder.

Rubber (Orange)

X

Rubber (Orange)

Y

Cassette mechanism assembly

Rubber (Pink)

CD mechanism assembly

Fig.26

Z

(To be loosened)

Claw ad

1

3

2

CD door damper holder

AA

Fig.27

Rubber (Pink)

X

CD tray assembly

Hanger

Spring plate

3 2

Claw ad

Claws ac

CD door switch board

CD door damper

Take out the CD door damper.

[Note]

After assembly, apply a locking agent to the screws AA.

Removing the CD door (See Fig. 28.)

1.

Open the CD door.

2.

While pressing the arm section ae of the CD door in the direction of the arrow, remove the arm section.

3.

While pressing the arm section af of the CD door in the direction of the arrow, remove the CD door.

[Note]

When attaching the CD door, hang the spring to the section ag of the CD door.

CD door

Section ag

Arm af

Spring

Arm ae

Fig.28

1-13

RC-BM5

Removing the CD pickup unit

(See Figs. 1 to 2.)

Prior to performing the following procedures, remove the CD mechanism assembly.

1.

Remove the three screws A retaining the CD pickup cover. (See Fig.1.)

2.

Remove the slit washer retaining the feed middle gear and take out the feed middle gear. (See Fig.2.)

3.

Loosen the two screws B retaining the shaft and pull out the shaft in the direction of the arrow.

(See Fig.2.)

4.

Take out the CD pickup unit.

[Note]

In the assembly, be sure to attach the sliding spring in the correct orientation before attaching the CD pickup unit.

(See Fig.2.)

A

CD pickup cover

A

CD mechanism assembly

Fig.1

CD pickup unit

Sliding Spring

B

Feed middle gear

Fig.2

CD pickup unit

Slit washer

Shaft

B

1-14

RC-BM5

Prior to performing the following procedures, remove the cassette mechanism assembly from the rear cabinet assembly. (See Fig.17 and 18 of "Rear cabinet section" on page 1-10.)

Removing the capstan motor

(See Figs.1 and 2.)

1.

Remove the capstan motor belt. (See Fig.1.)

2.

Remove the two screws A retaining the bracket of the capstan motor from the cassette mechanism assembly. (See Fig.1.)

3.

Remove the two screws B retaining the bracket from the capstan motor. (See Fig.2.)

Removing the leaf switch (See Fig.3.)

Pressing the claw a of the leaf switch in the direction of the arrow 1 and take out the leaf switch in the direction of the arrow 2.

Removing the pinch roller arm

assembly (See Fig.4.)

Remove the screw C retaining the pinch roller arm assembly and remove the pinch roller arm assembly in an upward direction.

[Note]

In the assembly, hang the notch b of the pinch roller arm assembly to the spring.

Capstan motor

Capstan motor belt

Flywheel assembly

Leaf switch

A

Cassette mechanism assembly

Fig.1

Capstan motor

Bracket

B

Fig.2

2

Removing the erase head

(See Fig.4.)

Remove the screw D retaining the erase head and remove the erase head in an upward direction.

Removing the REC/PB head

(See Fig.4.)

Remove the screw E, washer and screw F retaining the REC/PB head and remove the REC/PB head.

[Notes]

When removing or replacing the REC/PB head, perform the REC/PB head adjustment. (See "Adjustment method".) After adjusting the REC/PB head, apply

a locking agent to the screws F.

Removing the flywheel assembly

(See Figs. 4 and 5.)

1.

From the bottom side of the cassette mechanism assembly, remove the main belt. (See Fig.4.)

2.

From the top side of the cassette mechanism assembly, remove the slit washer retaining the shaft of the flywheel assembly. (See Fig.5.)

D

Erase head

1

REC/PB head

Washer

Shaft

Fig.3

Main belt

FE

Fig.4

Slit washer

Claw a

Flywheel assembly

Notch b

Spring

C

Pinch roller arm assembly

3.

Pull out the flywheel assembly in the direction of the arrow. (See Fig.5.)

Cassette mechanism assembly

Flywheel assembly

Fig.5

1-15

RC-BM5

Adjustment method

Measuring instructions required for adjustment

1. AM signal generator

2. FM signal generator

3. Inter mediate frequency sweep generator

4. FM stereo signal generator

5. Low-frequency oscillator (oscillation frequency 50Hz-20kHz, 0dB output with 600 ohm impedance)

6. Attenuator (600 ohm impedance)

7. Electronic voltmeter

8. Distortion meter

9. Torque gauge (cassette for CTG-N)

10. Wow & flutter meter

11. Frequency counter meter

12. Test tape VT712 : For tape speed and wow flutter VT724 : For reference level VT702 : For playback frequency VT702 : For head azimuth adjustment

13. Blank tape TAPE : AC-225

Measuring instruments

Radio section FM 1kHz, 22.5kHz deviation FM STEREO : 1kHz, 67.5kHz deviation pilot signal 7.5kHz AM : 1kHz, 30% modulation Reference output : Speaker output 0.5W(1.2V) 3.2 ohm Standard mode of function knob : Selects FM or AM in tuner mode Bass boost: OFF Preset EQ: Flat Main volume: Reference output

Cassette amplifier section Reference output : Speaker output 0.5W(1.2V) 3.2 ohm Standard mode of function knob : Press TAPE knob of select TAPE mode

CD section CD test disc : CTS-1000

Measurement conditions

Power supply voltage AC230V(50Hz) : A version AC220-230V(50Hz)/AC110-127V(60Hz) : US/UJ version

1-16

Cassette amplifier section

Item Measuring condition Check and adjustment procedure Standard value Adjusting part

Head azimuth adjustment

Tape speed and wow/flutter check and adjustment

PB frequency response check

Bias frequency check

REC and PB frequency response adjustment

Test tape: VT702 (8kHz) Signal output terminal: SPEAKERS

Test tape: VT712 (3kHz) Signal output terminal: SPEAKERS

Test tape: VT702 Signal output terminal: PHONES (with 32 ohm load) Tape: Normal Signal output terminal: Cassette REC./PLAY HEAD Test tape: AC225 Signal input: FM22.5 DEV 60dBu with emphasis Signal output terminal: SPEAKERS

Play back the test tape VT702 (8kHz).

1. Adjust the head azimuth adjusting screw so that the

2. phase difference between the R and L channels is minimized at an output level that is within (+2dB-2dB) of the maximum output level in the FWD and REV operations. After this adjustment, lock the head azimuth adjusting screw with screw sealant to cover more than a half of the screw head. When the head azimuth is maladjusted, correct it with

3. the head azimuth adjusting screw in the FWD and REV operations alternately. Play back the test tape VT712 (3kHz) by the end

1. portion. Connect a frequency counter and check that it reads

2. between 2940 and 3090Hz. If not, adjust the frequency with the motor semifixed resistor. Check that the wow/flutter is within 0.38%

3. (unweighted).

Play back the test tape VT702 while con-firming that deviation between the 1kHz signal and 8kHz signal should be (0+3dB-6dB).

While recording, check to see if the frequency at the measuring point is (75+2kHz-2kHz) if not adjust T605 until the frequency counter indicates (75+2kHz-2kHz).

In recording FM mode, and record the reference 1kHz signal and 8kHz signal alternately repeatedly. While playing back the recorded signal differ from that of the 1kHz signal by within (0+4dB-4dB).

Output level: Within (+2dB-2dB) of maximum output level Phase difference R and L channels: Minimum

2940 to 3090Hz

Within 0.38% (unweighted)

Deviation between 1kHz and 8kHz: (0+3dB-6dB)

Level difference between REC and PB: Within (0+4dB-4dB)

Tuner section

Item Measuring condition Check and adjustment procedure Standard value Adjusting part

FM VT adjustment

AM VT adjustment

FM IF adjustment

AM IF adjustment

Signal input: FM antenna VT test point: IC101 pin8 Signal input: AM loop antenna VT test point: IC101 pin8

Signal input: IC101 pin3 Voltage test point: IC101 pin19 and pin20

Signal input: IC101 pin2 Signal output: IC101 pin10

Set the FM signal generator at 108MHz and output

1. level at 60dBu. Adjust L102, so that the VT is within (8V+0.2V-0.2V).

2.

Set the AM signal generator at 1710kHz and output

1. level at 100dBu. Adjust T102, so that the VT is with (8V+0.1V-0.1V).

2.

Set the FM signal generator at 10.7MHz with no

1. signal deviation and output level at 90dBu. Short IC101 pin21 to GND.

2. Adjust T103 so that the voltage between IC101 pin19

3. and pin20 is within (0V+3mV-3mV).

Set the intermediate frequency sweep generator to

1. AM 450kHz. Adjust T104 and T105 for maximum and center

2. output. Adjust T106 so that the voltage between IC101 pin19

3. and pin20 is within (0V+2mV-2mV).

VT=8V+0.2V-0.2V

VT=8V+0.1V-0.1V

0V+3mV-3mV

0V+2mV-2mV

RC-BM5

Head azimuth adjusting screw (To be used only after head replacement) See Fig.1 on page 1-18.

Tape speed: Motor semifixed resistor

See Fig.2 on page 1-18. Check only

T605 See Fig.3 on page 1-18.

L102 See Fig.4 on page 1-18.

T102 See Fig.4 on page 1-18.

T103 See Fig.4 on page 1-18.

T104,T105

T106 See Fig.4 on page 1-18.

1-17

RC-BM5

Item Measuring condition Check and adjustment procedure Standard value Adjusting part

AM tracking adjustment

Signal input: AM ANT. COIL antenna Signal output: IC101 pin14 or

IC101 pin15 FM tracking adjustment

Signal input:

FM antenna

Signal output:

IC101 pin14 or

IC101 pin15 FM stereo separation adjustment

Signal input:

FM antenna

Signal output:

IC101 pin14 or

IC101 pin15

Location of adjusting parts

Cassette mechanism section

(Caution) For adjusting any head, be sure to use a screw driver degaussed.

Set the AM signal generator at 603kHz and the unit

1. receiving 603kHz, adjust L105 for maximum output.

Set the AM signal generator at 1404kHz and the unit

2. receiving 1404kHz, adjust TC101 for maximum output.

Set the FM signal generator at 90MHz and the unit

1. receiving 90MHz, adjust L101 for maximum output. Set the FM signal generator at 106MHz and the unit

2. receiving 106MHz, adjust TC102 for maximum output.

Set the AM signal generator at 98MHz with stereo

1. deviation and the unit receiving 98kHz. Adjust VR101, so that the separation between the R

2. and L channels for maximum.

L105

TC101 See Fig.4 on page 1-18. L101

TC102 See Fig.4 on page 1-18.

VR101 See Fig.4 on page 1-18.

max

Cassette board

T605

Head

Azimuth adjustment screw

Fig.1 Head output signal

Adjustment

Tuner board

T105

T106

CASSETTE MOTOR

T102

T104

1pin

IC101

15pin

T103

Tape Speed Adj.

L2

L101

TC1

TC102

VR101

14pin

TC10

TC101

L102

1

L

-

+

Fig.2

L105

(AM ANT. COIL)

1-18

Fig.3

Fig.4

Trouble shooting

RC-BM5

Circuit Symptom Cause

General

AM

FM

Tape

No sound

No sound, weak sound (Low sensitivity)

No sound/recording, unsteady tape sound, weak sound

The unit is on STANDBY mode.

Defective volume control

The unit is on MUTE mode.

Adjust the set position for the best reception.

AM VT faulty

Intermediate frequency tuning faulty

RF tracking faulty

Defective IC101

Adjust FM antenna position for the best reception.

Defective IC101

Intermediate frequency tuning faulty

Dirty capstan or head

Irregular cassette tape winding

Defective IC601

Remedy

Press STANDBY/ON button to turn on the unit.

Set the volume control to a proper sound level.

Press MUTE on the remote control.

Readjust (see "Adjustment method").

Check voltages. Replace if necessary.

Readjust (see "Adjustment method").

Clean the capstan or head with alcohol.

Replace tape.

Check voltages. Replace if necessary.

CD CD-R CD-RW MP3-CD

Cannot read the table of content. No display, no sound

Cassette erasure prevention tabs broken out

Disc is inserted upside down.

Disc is dirty.

Disc is scratched.

Disc is seriously warped.

A non-standard disc has been inserted.

Moisture has formed inside the CD deck.

Defect in the servo control board

Defect in the CD pickup mechanism

MP3 formats not supported.

Replace tape or cover tab openings with adhesive tape.

Insert disc correctly.

Wipe clean with a soft cloth.

Use a new disc.

Use only a brand name disc.

Wait about 20 to 30 minutes.

Replace or repair as required.

Replace as required.

Use MP3-CD formats supported on this unit

1-19

RC-BM5

Flow of functional operation until TOC read

Power ON

Slider turns REST SW ON.

Laser ON

Focus start

FOK

Turn on focus servo

Confirm that the voltage at the pin5 of H502 is "H"/"L"/"H"

Check that the voltage at the pin64(LD) of IC501 is +3.3V.

Disc spinning

Radial_error scaling

PLL Lock

Turn on radial servo

Read TOC

Check that the voltage at the pin1 and pin2 of H502 is +0.78V.

Confirm the eye-pattern at the "RF" test point.

1-20

RC-BM5

Maintenance of laser pickup

(1) Cleaning the pick up lens Before you replace the pick up, please try to clean the lens with a alcohol soaked cotton swab.

(2) Life of the laser diode When the life of the laser diode has expired, the following symptoms will appear.

The level of RF output (EFM output:ampli tude of eye pattern) will below.

Is the level of

RF OUT under

1.25V 0.22Vp-p?

YES

O.K

NO

Replace it.

Replacement of laser pickup

Turn off the power switch and,disconnect the power cord from the AC OUTLET.

Replace the pickup with a normal one.(Refer to "Removing the CD pickup" on the previous page)

Plug the power cord in,and turn the power on. At this time,check that the laser emits for about 3 seconds and the objective lens moves up and down. Note: Do not observe the laser beam directly.

Play a disc.

Check the eye-pattern at the "RF" test point.

Finish.

(3) Semi-fixed resistor on the APC PC board The semi-fixed resistor on the APC printed circuit board which is attached to the pickup is used to adjust the laser power. Since this adjustment should be performed to match the characteristics of the whole optical block, do not touch the semi-fixed resistor. If the laser power is lower than the specified value,the laser diode is almost worn out, and the laser pickup should be replaced. If the semi-fixed resistor would be adjusted when the pickup operates normally,the laser pickup may be damaged due to excessive current.

1-21

RC-BM5

Description of major ICs

SAA7324H (IC501) : Digital servo processor & compact disc decoder

1. Terminal layout

1

HFREF

2

HFIN

3

ISLICE

4

V

SSA1

5

V

DDA1

6

I

ref

7

V

RIN

8

D1

9

D2

10

D3

11

D4

12

R1

13

R2

14

V

SSA2

15

CROUT

16

CRIN

2. Block diagram

12

R1

13

R2

SCL SDA RAB

SILD

HFIN

Iref

SUB

RCK

7

40 39 41 42

2

1

3

6

25

31

44

24

16

15

26

49

48

47

46

45

43

38

VRIN

HFREF

ISLICE

TEST1

TEST2

TEST3

SELPLL

CRIN

CROUT

CL16

CL11/4

SBSY

SFSY

STATUS

RESET

LDONV1V5V4MOTO2

646362616059585756555453525150

171819202122232425262728293021

LP

LN

DDA2

V

D1 D2 D3 D4

8 9 10 11

ADC

SSD3VDDD2(C)

MOTO1

V

SLFORA

SAA7324H

RP

RN

pos

neg

V

TEST1

SELPLL

SS

A2

V

VSSA1

4 14 5 17 33 50 58 52 57

PRE.

PROCESSING

CL16

V

DD1(P)

CFLG

V

DATA

SCLK

WCLK

DD

V

DD

A1

Vref

GENERATOR

MICROCONTROLLER

CONTROL

PART

INTERFACE

DIGITAL

FRONT-

END

PLL

EFM

DEMODULATOR

TEST

SRAM

RAM

ADDRESSER

TIMING

SUBCODE

PROCESSOR

DETECT

DECODER

MICRO-

CONTROLLER

INTERFACE

VERSATILE PINS

INTERFACE

63 34 61 62

V1 V2/V3 V4 V5 KILL

SSD2

DOBM

V

CL11/4 49

32

EF

KILL

TEST2

A2

V

SS

D1

CONTROL

FUNCTION

PROCESSOR

PEAK

KILL

48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33

SS

V

AUDIO

32

D2

SBSY SFSY SUB RCK TEST3 STATUS SILD RAB SCL SDA RESET SCLI SDI WCLI V2/V3 V

SSD1

V

DDD1(P)

V

SS

D3

OUTPUT STAGES

MOTOR

CONTROL

ERROR

CORRECTOR

FLAGS

EBU

INTERFACE

SERIAL DATA

INTERFACE

SERIAL DATA

(LOOPBACK)

INTERFACE

BITSTREAM

DAC

V

DDD2(C)

54

RA

55

FO

56

SL

64

LDON

59

MOTO1

60

MOTO2

53

CFLG

51

DOBM

30

EF

29

SCLK

28

WCLK

27

DATA

37

SCLI

35

WCLI

36

SDI

20

Vneg

21

VPOS

18

LN

19

LP

22

RN

23

RP

1-22

RC-BM5

3. Pin function Pin No. Symbol I/O Function

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49

HFREF HFIN ISLICE

SSA1

V V

DDA1

Iref

RIN

V D1 D2 D3 D4 R1 R2

SSA2

V CROUT CRIN V

DDA2

LN LP

neg

V V

pos

RN RP SELPLL TEST1 CL16 DATA WCLK SCLK EF TEST2 KILL

SSD1

V V2/V3 WCLI SDI SCLI RESET SDA SCL RAB SILD STATUS TEST3 RCK SUB SFSY SBSY CL11/4

I

Comparator common mode input

I

Comparator signal input

O

Current feedback output from data slicer

-

Analog ground 1

-

Analog supply voltage 1

O

Reference current output

-

Reference voltage for servo ADCs

I

Unipolar current input 1 (central diode signal input)

I

Unipolar current input 2 (central diode signal input)

I

Unipolar current input 3 (central diode signal input)

I

Unipolar current input 4 (central diode signal input)

I

Unipolar current input 1 (satellite diode signal input)

I

Unipolar current input 2 (satellite diode signal input)

-

Analog ground 2

O

Crystal/resonator output

I

Crystal/resonator input

-

Analog supply voltage 2

O

DAC left channel differential negative output

O

DAC left channel differential positive output

I

DAC negative reference input

I

DAC positive reference input

O

DAC right channel differential negative output

O

DAC right channel differential positive output

-

Selects whether internal clock multiplier PLL is used

I

Test control input 1 (this pin should be tied LOW)

O

16.9344MHz system clock output

O

Serial d4(1) data output (3-state)

O

Word clock output (3-state)

O

Serial bit clock output (3-state)

O

C2 error flag output (3-state)

I

Test control input 2 (this pin should be tied LOW)

O

Kill output (programmable;open-drain)

-

Digital ground 1

I/O

Versatile I/O:versatile input 2 or versatile output 3 (open-drain)

I

Word clock input (for data loopback to DAC)

I

Serial data input (for data loopback to DAC)

I

Serial bit clock input (for data loopback to DAC)

I

Power-on reset input (active LOW)

I/O

Microcontroller interface data I/O line (IIC-bus;open-drain output)

I

Microcontroller interface clock line input (IIC-bus)

I

Microcontroller interface R/W and load control line input (4-wire bus mode)

I

Microcontroller interface R/W and load control line input (4-wire bus mode)

O

Servo interrupt request line/decoder status register output (open-drain)

I

Test control input 3 (this pin should be tied LOW)

I

Subcode clock input

O

P-to-W subcode bits output (3-states)

O

Subcode frame sync output (3-sates)

O

Subcode block sync output (3-sates)

O

11.2896 or 4.2336MHz (for microcontroller) clock output

SAA7324H (1/2)

1-23

RC-BM5

Pin No. I/O FunctionSymbol

50 51 52 53 54 55 56 57 58 59 60 61 62 63 64

SSD2

V DOBM V

DDD1(P)

CFLG RA FO SL

DDD2(C)

V V

SSD3

MOTO1 MOTO2 V4 V5 V1 LDON

-

Digital ground 2

O

Bi-phase mark output (externally buffered;3-state)

-

Digital supply voltage 1 for periphery

O

Correction flag output (open-drain)

O

Radial actuator output

O

Focus actuator output

O

Sledge control output

-

Digital supply voltage 2 for core

-

Digital ground 3

O

Motor output 1;versatile (3-state)

O

Motor output 2;versatile (3-state)

O

Versatile output 4

O

Versatile output 5

I

Versatile input 1

O

Laser drive on output (open-drain)

SAA7324H (2/2)

AN7312 (IC601) : Dual recording/Playback pre-amplifier circuit with ALC

1. Terminal layout

14 8

17

~

3. Pin function Pin No. Symbol Function

1

GND

2

ALC time constant

3

ALC input Ch.1

4

Output Ch.1

5

Phase compensation Ch.1

6

N.E.B. Ch.1

7

Input Ch.1

8

Input Ch.2

9

N.E.B. Ch.2

10

Phase compensation Ch.2

11

Output Ch.2

12

ALC input Ch.2

13

Ripple filter

14

Vcc

2. Block diagram

Vcc

14 13 12 11 10

Ripple Filter

ALC

1 2 3 4 5 6

GND

Amp.

Ch2

Amp.

Ch1

9

I/O

GND

ALC time constant by resistance and capacitor

Right channel ALC input

I

Right channel output

O

Not connect

Right channel negative feed back input

I

Right channel signal input

I

Left channel signal input

I

Left channel negative feed back input

I

Not connect

Left channel output

O

Left channel ALC input

I

Ripple filter

Power supply

-

8

7

1-24

MX10FLCDPC (IC301) : MCU

1.Terminal layout

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16 17 18 19 20

40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21

2. Block diagram

Vcc

Vss

REGISTER

RAM ADDR.

B

REGISTER

PSEN

ALE

RST

EA

TIMING

AND

CONTROL

P0.0-P0.7 P2.0-P2.7

PORT 0

DRIVERS

ALU

PSW

PORT1 LATCH

PORT 0

LATCH

RAM

ACC

TMP2 TMP1

REGISTER

INSTRUCTION

STACK

POINTER

T0/T1/T2

TIMERS

PORT2

DRIVERS

PORT 2

LATCH

WATCHDOG

SFRs

T3

TIMER

PORT1 LATCH

ROM

PROGRAM

REGISTER

INCREMENTER

PROGRAM COUNTER

RC-BM5

ADDR.

BUFFER

PC

DPTR

3.Pin function

Pin No. P1.0 to P1.7 P2.0 to P2.5,P3.4 to P3.5 P0.0 to P0.7 P3.3 P2.7 ALE EA P3.7,P3.1,P3.0 VDD GND

A0 to A7 A8 to A13,A14 to A15 Q0 to Q7 CE OE WE Vpp MS2 to MS0 VDD GND

Symbol I/O

NJM7805FA (IC505) : Regulator

1. Terminal layout

1.INPUT

2.OUTPUT

3.GND

2. Block diagram

INPUT

osc

I I

I/O

I

I/O

I

-

1

THERMAL SHUTDOWN

BANDGAP REFERENCE

PORT1

DRIVERS

XTAL2XTAL1

PORT1

DRIVERS

P3.0-P3.7P1.0-P1.7

Function Input low order address bits Input high order address bits Data input/output Chip enable input Output enable input Write enable input Program supply voltage, 12.5-13volts Flash mode selection Power supply voltage (+5V) Ground pin

OVER VOLTAGE PROTECTION

Q1

R1

2

OUTPUT

123

SOA PROTECTION

SHORT CIRCUIT

PROTECTION

3

GND

R2

1-25

RC-BM5

PT2314 (IC801) : 4ch input audio processor

1. Terminal layout

1 28 2 3 4

6 7 8

9 10 11 12 13 14

2. Block diagram

LOUT

LIN

LOUD_L

BOUT_L

BIN_L

27 26 25 245 23 22 21 20 19 18 17 16 15

LIN1

LIN2 LIN3

LIN4 RIN4

RIN3 RIN2 RIN1

LIN1

LIN2

LIN3

LIN4

RIN4

RIN3

RIN2

RIN1

Supply

Volume &

Loudness

Volume& Loudness

RB

Bass Treble

Serial Bus Decoder & Latches

Bass Treble

RB

TREBLE_L

Speaker

ATT

OUT_L

CLK

DATA

DGND

OUT_R

Speaker

ATT

Mute

VDD

REF

AGND

ROUT

RIN

LOUD_R

BOUT_R

3. Pin function Pin No. Symbol I/O Function

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28

VDD AGND TREB_L TREB_R RIN ROUT LOUD_R RIN4 RIN3 RIN2 RIN1 LOUD_L LIN4 LIN3 LIN2 LIN1 LIN LOUT BIN_L BOUT_L BIN_R BOUT_R OUT_R OUT_L DGND DATA CLK REF

-

Supply input voltage

-

Analog ground

I

Left channel input for treble controller

I

Right channel input for treble controller

I

Audio processor right channel input

O

Gain output and input selector for right channel

I

Right channel loudness input

I

Right channel input 4

I

Right channel input 3

I

Right channel input 2

I

Right channel input 1

I

Left channel loudness input

I

Left channel input 4

I

Left channel input 3

I

Left channel input 2

I

Left channel input 1

I

Audio processor left channel input

O

Gain output and input selector for left channel

I

Left channel input for bass controller

O

Left channel output for bass controller

I

Right channel input for bass controller

O

Right channel output for bass controller

O

Right speaker output

O

Left speaker output

-

Digital ground

I

Control data input

I

Clock input for serial data transmission

-

Analog reference voltage (1/2 VDD)

BIN_R

TREBLE_R

1-26

AS4C256KEO (IC701) : DRAM

1. Termianl layout 2. Block diagram

WE

RAS

1 2 3 4 5 6 7 8 9

10

11 12 13 14 15 16 17 18 19 20

40

CASL

39

CASH

38

37

36

35 34 33 32 31 30 29 28 27 26 25 24 23 22 21

A0 A1 A2 A3 A4 A5 A6 A7 A8

CONTROL

LOGIC

CLOCK

GENERATOR

COLUMN

ADDRESS

BUFFER

REFRESH

CONTROLER

REFRESH

COUNTER

ROW.

ADDRESS

BUFFERS<9>

ROW

DECODER

3. Pin function Pin No. Symbol Function

1 2 to 5 6 7 to 10 11,12 13 14 15 16 to 19 20 21 22 to 26 27 28 29 30 31 to 34 35 36 to 39 40

VCC I/O0 to I/O3 Vcc I/O4 to I/O7 NC WE RAS NC A0 to A3 Vcc GND A4 to A8 OE UCAS LCAS NC I/O8 to I/O11 GND I/O12 to I/O15 GND

I/O

Power (5V 0.5V)

Input/output

I/O

Power (5V 0.5V)

Input/output

I/O

Not connect

Read/write control

Row address strobe

Not connect

Address inputs

I

Power (5V 0.5V)

Ground

Address inputs

I

Output enable

O

Column address strobe,upper byte

Column address strobe,lower byte

Not connect

Input/output

I/O

Ground

Input/output

I/O

Ground

-

RPM6938-V4 (IC402) : Remote control receiver

1. Block diagram

3

1

2

I/V conversion

PD

AMP

for trimming circuit

magnetic shield

BPF

AGC

Detector

Vcc

Comp

22k ohm

VDD

OUT

GND

512

COLUMN

DECODER

512

SENSE AMPLIFIERS

I/O GATING

512 X 16

512 x 512 x 16

MEMORY

ARRAY

V

BB

GENERATOR

DATA-IN BUFFER

DATA-OUT

BUFFER

CC

V V

SS

OE

IO0

.

IO15

RC-BM5

1-27

RC-BM5

LS188C (IC703) : VCD decoder

1. Terminal layout 2. Block diagram

102 65

103

128

1 38

3. Pin function

Pin No.

1 to 3,22

4 to 11

12 to15

16

17,18,20,21

19

23,24

25 26 27 28 29 30 31 32 33 34 35 36

37 to 42

43

44,45

46 47 48 49 50 51

52 to 55

56

57,58

59

60,61

EMI_A_9 to EMI_A_12 EMI_D_7 to EMI_D_0 EMI_A_0 to EMI_A_3 VDD_IO_00 EMI_A_4 to EMI_A_7 VSS_IO_00 EMI_A_15 to EMI_A_16 EMI_A_18 I2C_CLK I2C_DAT VSS_OSC_0 XTLCLK_I XTLCLK_O VDD_OSC_0 TEST_H RESET_L HSYNC_L VSYNC_L CLK27_O VDAT_7 to VDAT_2 VSS_CORE_00 VDAT_1 to VDAT_0 VDD_CORE_00 AUD_XCK AUD_BCK AUD_LRCK AUD_DOUT AUD_DIN GPIO_23 to GPIO_20 VDD_IO_10 GPIO_19,GPIO_18 VSS_CORE_10 GPIO_17,GPIO_16

DRAM

64

ROM/SRAM

Panel and

keypad

39

Symbol Function

Host

I/O

O

I

O

-

O

O O O

-

I

O

-

I I I

I O O

-

O

-

O O O

I

-

DRAM

Interface

EMI

Interface

Prog.I/O Interface

CD

Host/CD Interface

RISC

Processor

DSP

Core

EMI address bus EMI data bus EMI address bus +3.3V EMI address bus +3.3V EMI address bus EMI address bus I2C clock I2C data GND Crystal input Crystal output +3.3V Te st Hardware reset Horizontal sync Vertical sync CLK 27MHz output Luminance output GND Luminance output +2.5V External audio clock Audio bit clock Audio left/right clock Audio data output Audio data input Programmable I/O +3.3V Programmable I/O GND Programmable I/O

Video

Processor

On Screen

Display

Video

Decoder

Audio

Decoder

Audio

Interface

Register

Bank

NTSC/PAL Encoder

Audio DAC

Audio ADC

LS188C (1/2)

1-28

Pin No.

62

63,64

65

66 to 79

80 81 82 83 84 85 86 87 88 89

90,91

92 93 94 95 96 97 98

99 100 101 102

103,104

105 106 107 108 109 110 111 112 113 114 115 116 117 118

119,120

121

122,123

124 125 126 127 128

Symbol FunctionI/O

VDD_CORE_10 GPIO_15,GPIO_14 VSS_IO_10 GPIO_13 to GPIO_0 IR_IN CD_DATA CD_LRCK CD_BCK CD_C2P0 DR_D_0 DR_D_15 DR_D_1 DR_D_14 VDD_IO_20 DR_D_2,DR_D_13 VSS_IO_20 DR_D_3 DR_D_12 DR_D_4 DR_D_11 DR_D_5 DR_D_10 VSS_PLL_0 VDD_PLL_0 DR_D_6 DR_D_9 DR_D_7,DR_D_8 VSS_CORE_20 LCAS_L DR_WE_L VDD_IO_30 UCAS_L URAS_L VDD_CORE_20 LRAS_L DR_A_8 DR_A_0 DR_A_7 DR_A_1 DR_A_6 VSS_IO_30 DR_A_2,DR_A_5 VSS_CORE_30 DR_A_3,DR_A_4 VDD_CORE_30 EMI_A_17 EMI_A_14 EMI_A_13 EMI_A_8

+2.5V

Programmable I/O

GND

Programmable I/O

IR input

I

CD serial data

I

CD left/right clock

I

CD bit clock

I

CD data error flag

I

DRAM data bus

+2.5V

DRAM data bus

GND

DRAM data bus

GND

+2.5V

DRAM data bus

GND

Lower column address strobe

O

Memory write enable

O

+3.3V

Upper column address strobe

O

Upper row address strobe

O

+2.5V

Lower row address strobe

O

DRAM address bus

O

DRAM address bus

O

DRAM address bus

O

DRAM address bus

O

DRAM address bus

O

GND

DRAM address bus

O

GND

DRAM address bus

O

+2.5V

EMI address bus

O

EMI address bus

O

EMI address bus

O

EMI address bus

O

RC-BM5

LS188C (2/2)

1-29

RC-BM5

ST24C01 (IC302) : Serial access 1K(128x8) EEPROM

1. Terminal layout

A0 A1

A2

V

SS

1 2

3 4

V

8

CC

7

WC

6

SCL

5

SDA

2. Pin function Pin No. Symbol I/O Function

1 2 3 4 5 6 7 8

A0 A1 A2

Vss SDA SCL

WC

VCC

TDA1308T (IC704) : Class AB stereo headphone driver

1. Terminal layout

I

Chip enable input

I

Chip enable input

I

Chip enable input

-

Ground

I/O

Serial data adress input/output

-

Serial clock

-

Write control (W version)

-

Supply voltage

3. Pin function2. Block diagram

OUTA

INA(neg)

INA(pos)

V

SS

1

2

3

4

TDA 1308

8

7

6

5

V

DD

OUTB

INB(neg)

INB(pos)

OUTA

INA(neg) INA(pos)

V

SS

1

2 3

4

8

7

6 5

V

DD

OUTB

INB(neg) INB(pos)

TDA7073 (IC502/IC503) : Dual BTL power driver

1. Terminal layout

IN1-

IN1+

n.c.

Vp

IN2+

IN2-

n.c.

1

2

3

4

5

6

7

8

16

OUT1+

15

n.c.

14

GND1

13

OUT1-

12

OUT2-

11

n.c.

10

GND2

9

OUT2+

1

2

3

4

5

6

7

8

DISC MOTOR

VDD

SLIDE MOTOR

16

15

14

13

12

11

10

9

Pin No. Symbol I/O Function

OUTA

1 2 3 4 5 6 7 8

INA(neg) INA(pos) Vss INB(pos) INB(neg) OUTB VDD

Output A

O

Inverting input A

I

Non-inverting input A

I

Negative supply

Non-inverting input B

I

Inverting input B

I

Output B

O

Positive supply

-

3. Pin function2. Block diagram Pin No. Symbol I/O Function

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16

IN1IN1+ n.c. n.c. Vp IN2+ IN2n.c. OUT2+ GND2 n.c. OUT2OUT1GND1 n.c. OUT1+

Negative input 1

I

Positive input 1

I

Not connect

Positive supply voltage

Positive input 2

I

Negative input 2

I

Not connect

Positive output 2

O

Ground 2

Not connect

Negative output 2

O

Negative output 1

O

Ground 1

Not connect

Positive output 1

O

1-30

PT6553 (IC401) : LCD driver with key input function

1. Terminal layout

KO5

KO4

KO3

KO2/SG42

KO1/SG41

COM3

COM2

COM1

SG40

SG39

SG38

SG37

SG36

SG35

SG34

SG33

KO6

K11

K12

K13

K14

K15

TEST

VDD

VDD1

VDD2

VSS

OSC

CLK

DO

CE

484746454443424140393837363534

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

DI

33

SG32

32

SG31

31

SG30

30

SG29

29

SG28

28

SG27

27

SG26

26

SG25

25

SG24

24

SG23

23

SG22

22

SG21

21

SG20

20

SG19

19

SG18

18

SG17

17

2. Block diagram

COM1

COM2

DO

CE

DI

COMMON

DRIVER

CLOCK

GENERATOR

INTERFACE

VDET

TEST

OSC

CLK

VDD

VDD1

VDD2

VSS

COM3

SG40

SG5

SG4/P4

SG3/P3

SEGMENT DRIVER & LATCH

SHIFT REGISTER

CONTROL

REGISTER

KEY BUFFER

KEY SCAN

SG2/P2

RC-BM5

SG1/P1

1

234

P1/SG1

P2/SG2

P3/SG3

P4/SG4

56789

SG5

SG6

SG7

SG8

10111213141516

SG9

SG10

SG11

SG12

SG13

SG14

SG15

SG16

3. Pin function Pin No. Symbol I/O Function

1 to 4

SG1/P1 to SG4/P4

O

Segment output general purpose output pins under serial data control these pins may be used a general purpose output parts.

5 to 40

41,42,43

44

45 46 to 49 50 to 54

55

56

57

58

59

60

61

62

63

64

SG5 to SG40 COM1,COM2,COM3 KO1/SG41 KO2/SG42 KO3 to KO6 K11 to K15 Test VDD VDD1 VDD2 VSS OSC DO CE CLK DI

O

Segment output pins

O

Common driver output pins

O

Key scan output segment output pin

O

Key scan output segment output pin

O

Key scan output pins

I

Key scan input pins

I

Test pin

-

Power supply

-

Power supply

-

Power supply

-

Ground

I/O

Oscillator pin

O

Data output pin

I

Chip enable pin

I

Synchronization clock input pin

I

Din transistor input pin

K15

K11

K05

K03

SG42/KO2

SG41/KO1

1-31

RC-BM5

TEA5757H (IC101): Self tuner radio (STR)

1. Terminal layout

2. Block diagram

43

FM-RFI

DATA

STAB(A)

STAB(B)

V

CC1

V

DDD

XTAL

DGND

P1 P0

42

28

27

29

38

34

7

23

1

25

26

31 30

2

RFGND

BUS-CLOCK

WRITE-ENABLE

V V

RIPPLE

AM-RFI

RIPPLE

1

2

AM-RFI

RFGND

FMOSC

V

CC1

TUNE

VCO

AFO

MPXI

3

4

5

6

7

8

9

10

11

OSCILLATOR

FM-FRO

AM-OSC

FM-RFO FMOSC

FM

FRONT-END

STABILIZER

PRESCALER

MULTIPLEXER

CRYSTAL

OSCILLATOR

AM

FRONT-END

AGC

FM-RFI

44

43

12

13

LFI

MUTE

5

FM

SHIFT REGISTER

LAST-STATION

MEMORY

PROGRAMMABLE

COUNTER

WINSOW

DETECTOR

AM

RF GND

AM-IFI1

42

41

14

15

AFLO

AFRO

FM-MIXER

39 37

FM

MIXER

AM

MIXER

AM-MIXER

FM-MIXER

40

39

TEA5757H

16

17

PILFIL

IFGND

FM-IFI1

FM IF1

STATUS

REGISTER

SEQUENTIAL

CIRCUIT

FM

AM

IF

STAB(A)

V

38

18

FMFEM

FM-IFO1

35 33

FM-IFI1

37

19

(n)

AFC

FM-IFI2

Up Down Level

AGC

AM-IFI/O2

36

20

(p)

AFC

STAB(B)

FM-IFO1

V

35

34

33

32

31

30

29

28

27

26

25

24

23

21

22

FSI

CC2

V

IFGND

FMDEM

17 18

FM IF2FMDETECTOR

AM/FM

INDICATOR

IN-LOCK

DETECTOR

CHARGE

PUMP

Hard mute

AFC

AM

DETECTOR

FM-IFI2

AFC

P1

P0

WRITE-ENABLE

DATA

BUS-CLOCK

DGND

XTAL

MO/ST

V

DDD

FSI

21

DETECTOR

19 kHz

38 kHz

DECODER

MATRIX

Stereo Mono

SDS

level

CONVERTER

PILOT

PLL

V/I

Stereo

MUTE

16

PILFIL

24

MO/ST

12

LFI

9

VCO

14

AFLO

AFRO

15

13

MUTE

19

AFC

(n)

(p)

20

32

1-32

6

AMOSC

AM-MIXER

AM-IFI/O2

AM-IFI1

AGC

TUNE

844364140

AFO

V

CC2

1122 10

4

RFGNDMPXI

RC-BM5

3. Pin function Pin No. Symbol I/O Function

RIPPLE

1

AM-RFI

2

FM-RFO

3

RFGND

4

FMOSC

5

AMOSC

6

V

7 8

9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44

CC1

TUNE VCO AFO MPXI LFI MUTE AFLO AFRO PILFIL IFGND FMDEM AFC AFC(p) FSI V

CC2

VDDD MO/ST XTAL DGND BUS-CLOCK DATA WRITE-ENABLE P0 P1 AFC FM-IFI2 V

STAB(B)

FM-IFO1 AM-IFI/O2 FM-IFI1 V

STAB(A)

FM-MIXER AM-MIXER AM-IFI1 RFGND FM-RFI AGC

(n)

Ripple capacitor input

I

AM-RF input

I

Parallel tuned FM-RF circuit to ground

RF ground and substrate

Parallel tuned FM-oscillator circuit to ground

Parallel tuned AM-oscillator circuit to ground

Supply voltage

Tuning current output

O

Voltage controlled oscillator input

I

AM/FM AF output (output impedance typical 5k )

O

Stereo decoder input (input impedance typical 150k )

I

Loop-filter input

I

Mute input

I

Left channel output (output impedance typical 4.3k )

O

Right channel output (output impedance typical 4.3k )

O

Pilot detector filter input

I

Grond of IF,detector and MPX stage

Ceramic discriminator input

I

AFC negative output

O

AFC positive output

O

Field-strength indicator

Supply voltage for tuning

Digital supply voltage

Mono/stereo and tunig indication output

O

Crystal input

I

Digital ground

Bus-clock input

I

Bus data input/output

I/O

Bus write-enable input

I

Programmable output port (P0)

O

Programmable output port (P1)

O

450kHz LC-input circuit

I

FM-IF input 2 (input impedanc typical 330 )

I

Internal stabilized supply voltage (B)

FM-IF output1 (output impedance typical 330 )

O

Input/output to IF-Tank (IFT);output:current souce

I/O

FM-IF input1 (input impedance typical 330 )

I

Internal stabilized supply voltage (A)

Ceramic filter output (output impedance typical 330 )

O

Open-collector output to IFT

O

IFT or ceramic filter input (input impedance typical 3k )

I

FM-RF ground

FM-RF aerial input (input impedance typical 40 )

I

AGC capacitor input

I

TEA5757H

1-33

RC-BM5

TZA1024T (IC504) : Data amplifier and laser supply

1. Terminal Layout

2. Pin function

LD

1

V

2

DD(L)

3

CFIL

4

MON

DIN

GND

PWRON

TZA1024

5

6

7

3. Block diagram

DIN

11

5

CDRW

14

RGADJ

V

13

DD

12

EQSEL

11

CDRW

10

RFEQO

9

RFFB

8

CMFB

V

DD

13

1

4

Pin No. Symbol I/O Function

Current output to laser diode

1 2 3 4 5 6 7 8

9 10 11 12 13 14

LD V

DD(L)

CFIL MON DIN GND PWRON CMFB RFFB RFEQO CDRW EQSEL

DD

V RGADJ

V

DD

O

Laser supply voltage

External filter capacitor

Laser monitor diode input

I

Central diode input

I

Ground

Power-on select input

I

Common mode feedback voltage input

I

External RF feedback resistor

RF amplifier output

O

Gain select input for CD-A/V, CD-R/W

I

Equalizer/speed select input (n=1,2 or 4)

I

Supply voltage

External laser supply gain adjust resistor

-

12

EQSEL

9

RFFB

10

RFEQO

MON

2

250 kHz

V/I

4

GND

V

GAP

(1)

V

DD(L)

V/I

V

26

DD

14

MGR517

8

CMFB

1

LD

RGADJ

3

CFIL

7

PWRON

1-34

BA5417 (IC201) : Dual power amplifier

1. Terminal layout & Block diagram 2. Pin function Pin No. Symbol I/O Function

1

T.S.D.

IN2

IN1

45

30K

RF2

30K

GND1

Pre

PRE GND1

30K

BS

ST.BY

GND

Power

ST.BY

45

FILTERBS

FILTER

RF1

Vcc

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

N.C.

BS

OUT1

Vcc

OUT2BSPOWER GND

GND2

Pre

PRE GND2

2 3

OUT1 4 5

OUT2 6 7 8 9

ST.BY

FILTER 10 11 12 13 14

PRE GND1

15

PRE GND2

W27C020 (IC702) : EEPROM

1. Terminal layout

2. Block diagram

NC BS

VCC

BS

GND

RF1

IN2 IN1

RF2

-

Not connect

-

BS

O

Output terminal

O

Power supply

O

Output terminal

O

BS

O

Power GND

I

ST.BY

I

Filter

-

RF1

-

Input terminal

-

Input terminal

-

RF2

I/O

PRE GND

O

PRE GND

RC-BM5

PGM 1 Vcc32Vpp 2 PGM31A16 3 A1730A15 4 A1429A12 5 A1328A7 6A827A6 7A926A5 8 A1125A4 9OE24A3 10 A1023A2 11 CE22A1 12 Q721A0 13 Q620Q0 14 Q519Q1 15 Q418Q2 16 Q317GND

CE

OE

A0

A17

Vcc

GND

Vpp

3. Pin function Pin No. Symbol I/O Function

1

2 - 12

13 - 15

16

17 - 21

22 23 24

25 - 30

31 32

Vpp A16,A15,A12,A7 - A0 Q0 - Q2 GND Q3 - Q7 CE A10 OE A11,A9,A8,A13,A14,A17 PGM Vcc

Program/Erase supply voltage

Address inputs

I

Data inputs/ outputs

I/O

Connect to GND

Data inputs/ outputs

I/O

Chip enable

Address input

I

Output enable

O

Address inputs

I

Program enable

Power supply

-

CONTROL

DECODER

OUTPUT

BUFFER

CORE

ARRAY

Q0

Q7

1-35

RC-BM5

Wiring connections

OW31-60190-50

(A version)

(Forward side)

Tuner board

H801

OW25-94100-02

CASS DECK

CD MECH

OW20-41021-12

CN702

OW20-41022-29K

Cassette board

OW20-41101-20

H701H702

H302

Main board

(Forward side)

OW32-35160-28

OW25-61080-01

CN701

H502

H501

CN804

CN204

OW20-51061-13

CN302

CN303

CN803

CN802

CN801

OW20-42081-09

CN206

CN301

OW20-61033-00K

OW20-41062-17K

(Forward side)

OW32-30140-20

OW20-41112-20

CN401

CN601

Display board

SW2M-M+

SW1

CN602

CN603

LED41

(Forward side)

H602

OW20-41102-32

LCD1

1-36

BLUE

6 7 8 9 0

BROWN

12345

Color codes are shown below.

VIOLET

GREY

RED

ORANGE

WHITE

BLACK

YELLOW

GREEN

OW31-20190-56

OW31-20160-52

OW31-20160-54

OW31-20190-50

OW25-94060-03

CN202

H202

CN205

Phone jack board

OW20-42042-08

(Forward side)

Power amplifier board

CN203

OW31-60120-13T

OW31-60150-10

(Forward side)

OW31-60120-13T

OW31-60150-10

H402

(Forward side)

Volume switch board

OW31-60090-52

OW31-60080-54

OW31-60090-52

OW31-60080-54

OW31-60190-50

(US/UJ version)

(Forward side)

Tuner board

H801

RC-BM5

OW25-94100-02

CASS DECK

CD MECH

OW20-41021-12

CN702

OW20-41022-29K

Cassette board

OW20-41101-22

H701H702

H302

Main board

(Forward side)

OW32-35160-28

OW25-61080-01

CN701

H502

H501

CN804

CN204

OW20-51061-13

CN302

CN303

CN803

CN802

CN801

OW20-42082-06

CN206

CN301

OW20-61033-00K

OW20-41062-17K

(Forward side)

OW32-30140-20

OW20-41112-20

CN401

Display board

SW2

SW1

CN602

CN601

LED41

(Forward side)

CN603

M+

M-

H602

OW20-41102-32

LCD1

BLUE

6 7 8 9 0

BROWN

12345

Color codes are shown below.

VIOLET

GREY

RED

ORANGE

WHITE

BLACK

YELLOW

GREEN

OW31-20190-56

OW16-10212-00

OW31-20160-52

OW31-20160-54

OW25-94060-03

OW31-20190-50

H202

CN202

CN205

(Forward side)

Phone jack board

OW20-42042-08

(Forward side)

Power amplifier board

CN203

OW31-60120-53

OW31-60150-50

OW31-60120-53

OW31-60150-50

H402

(Forward side)

Volume switch board

OW31-60090-52

OW31-60080-54

OW31-60090-52

OW31-60080-54

1-37

RC-BM5

VICTOR COMPANY OF JAPAN, LIMITED

AUDIO & COMMUNICATION BUSINESS DIVISION PERSONAL & MOBILE NETWORK BUSINESS UNIT. 10-1,1Chome,Ohwatari-machi,maebashi-city,371-8543,Japan

No.21132

200302

JVC RC BM5 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Preventing static electricity

Important for laser products

Disassembly method

Adjustment method

Trouble shooting

Flow of functional operation until TOC read

Maintenance of laser pickup

Replacement of laser pickup

Description of major ICs

Wiring connections