PIONEER RV B550BU Service Manual

RV-B550BU

SERVICE MANUAL

CD PORTABLE SYSTEM

RV-B550BU

Supplement

TIMER

CLOCK TIMER ON/OFF

SLEEP

AUX C D TAPE	TUNER
SOUND	ACS

AHB PRO

VOLUME

RM-RXVB55

REMOTE CONTROL

	Area Suffix
UY	................ Argentina

This service manual adds UY version to the service manual (RV-B550BU No.20826) previously issued.

Contents

Safety precautions ...................................	1-2
Importance administering
point on the safety .............	1-3
Important for laser products ....................	1-4
Preventing static electricity ......................	1-5
Disassembly method ...............................	1-6

Adjustment method .................................	1-15
Flow of functional operation
until TOC read .................	1-19
Maintenance of laser pickup ....................	1-20
Replacement of laser pickup ....................	1-20
Description of major ICs ..........................	1-21~29

This service manual is made from 100% recycled paper. COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD.

No.20826C

Jan. 2001

RV-B550BU

Safety precautions

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 current 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

AC VOLTMETER

metal part and a known good earth ground.

(Having 1000

Measure the

AC voltage across the resistor

with the

ohms/volts,

AC voltmeter.

or more sensitivity)

Move the

resistor connection to each exposed metal

part,

particularly any exposed metal part having a

0.15

F

AC TYPE

return

path

to the

chassis, and measure the AC

Place this

voltage

across the

resistor. Now, reverse the plug in

probe on

the AC outlet and repeat each measurement. Voltage

each exposed

1500

10W

measured any must

not exceed 0.75 V AC

(r.m.s.).

metal part.

This

corresponds to 0.5 mA AC (r.m.s.).

Good earth ground

Warning

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.

! CAUTION 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.

1-2

RV-B550BU

Importance administering point on the safety

Note : It's means "J" for U.S.A. and Canada market model.

RV-B550J ONLY

Full Fuse Replacement Marking

Graphic symbol mark

(This symbol means fast blow type fuse.)

should be read as follows ;

FUSE CAUTION

FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE AND RATING OF FUSES ;

F1901 : 1.0-A, 250-V

F1902 : 6.3-A, 125-V

F1903 : 6.3-A, 125-V

F1904 : 6.3-A, 125-V

RV-B550J SEULEMENT

Marquage Pour Le Remplacement

Complet De Fusible

Le symbole graphique (Ce symbole signifie fusible de type a fusion rapide.)

doit etre interprete comme suit ;

PRECAUTIONS SUR LES FUSIBLES

POUR UNE PROTECTION CONTINUE CONTRE DES RISQUES D'INCENDIE, REMPLACER SEULEMENT PAR UN FUSIBLE DU MEME TYPE ;

F1901 : 1.0-A, 250-V

F1902 : 6.3-A, 125-V

F1903 : 6.3-A, 125-V

F1904 : 6.3-A, 125-V

1-3

RV-B550BU

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.

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.

VARNING : Osynlig laserstrålning är denna del är öppnad och spårren är urkopplad. Betrakta ej strålen.

VARO : Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymättömälle lasersäteilylle.Älä katso säteeseen.

ADVARSEL : Usynlig laserstråling ved åbning , når sikkerhedsafbrydere er ude af funktion. Undgå udsættelse for stråling.

ADVARSEL : Usynlig laserstråling ved åpning,når sikkerhetsbryteren er avslott. unngå utsettelse for stråling.

REPRODUCTION AND POSITION OF LABELS

WARNING LABEL

CLASS 1

LASER PRODUCT

DANGER : Invisibie laser radiation			VARO : Avattaessa ja suojalukitus
when open and interlock or			ohitettaessa olet alttiina
defeated.			näkymättömälle lasersäteilylle.Älä
AVOID DIRECT EXPOSURE TO			katso säteeseen.	(d)
BEAM	(e)
VARNING : Osynlig laserstrålning är			ADVARSEL :Usynlig laserstråling
denna del är öppnad och spårren är			ved åbning , når
urkopplad. Betrakta ej strålen.	(s)		sikkerhedsafbrydere er ude af
			funktion. Undgå udsættelse for
			stråling.	(f)

1-4

Flexible cable

RV-B550BU

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

In the equipment which uses optical pick-up (laser diode), optical pick-up is destroyed by the static electricity of the work environment.

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.Cut off the shorted part of the flexible cable using nippers, etc. 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 cable 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

Attention when CD mecanism assembly is decomposed

*Please refer to "Disassembly method" in the text for pick-up and how to

	detach the CD mechanism.	Card wire
	1. Remove CD mechanism assembly.	CD changer
	2. Remove the four screws on the microcomputer board.	mechanism
		assembly

3.Disconnect the connector CN907 and CN602 on the microcomputer board.

4.The microcomputer board is put up as shown in Fig.1.

5.Solder is put up before the card wire is removed from connector CN601 on the maicroconputer board as shown in Fig. 2.

(When the wire is removed without putting up solder, the CD pick-up assembly might destroy.)

6.Please remove solder after connecting the card wire with CN601 when you install picking up in the substrate.

Microcomputer

board

Fig.1

Soldering

Fig.2

1-5

RV-B550BU

Disassembly method

<Main Body>

Removing the side grilles

(See Fig.1 and 2)

1.Remove the six screws A attaching the side grille on the left side of the body and pull out the side grille from the body.

2.Similarly, remove the side grille on the right side.

Removing the front cabinet assembly and the rear cabinet assembly (See Fig.3 and 3a)

Prior to performing the following procedure, remove the right and left side grilles.

1.Remove the battery cover on the back of the body.

2.Remove the eight screws B on the back of the body and detach the front cabinet assembly and the rear cabinet assembly. Disconnect the connector CN904 on the LED (Illumination) board.

Attention: When reassembling, make sure that connector CN633 on the rear cabinet is connected to the speaker terminal on the front cabinet.

CN904

LED (Illumination) board

Fig.3a

Side grille (left)

A A

Fig.1

Side grille (right)

A A

Fig.2

B B

Push Push

B

Battery cover

B

Fig.3

1-6

Removing the cassette mechanism assembly (See Fig.4 and 5)

Prior to performing the following procedure, remove the right and left side grilles and the front cabinet assembly.

1.Disconnect the card wires from connector CN405 and CN406 on the microcomputer board located on the underside of the CD unit of the rear cabinet assembly.

2.Remove the four screws C attaching head shield and the cassette mechanism assembly.

Removing the CD unit assembly

(See Fig.6 to 8)

RV-B550BU

CN406 CN405

Cassette mechanism

assembly

Microcomputer board

Fig.4

The CD unit assembly cannot be removed if the cassette mechanism assembly has not been removed.

Prior to performing the following procedure, remove the right and left side grilles, the front cabinet assembly and the cassette mechanism assembly.

1.Remove the cassette chassis (See Fig.6).

2.Disconnect the card wires from connector CN631 and CN632 on the amplifier board.

3.Disconnect the card wires from connector CN403 on the microcomputer board.

4.Remove the two screws D attaching the CD mechanism assembly on the back of the rear cabinet

(See Fig.8).

5. Pull out the CD unit assembly toward the front.

C C

Cassette chassis Cassette mechanism assembly

Head shield

Fig.5

CD unit assembly	Cassette chassis
Microcomputer board	Fig.6
CN403
	CD unit assembly

D

amplifier board
CN632	Rear cabinet
CN631
Fig.7	Fig.8

1-7

RV-B550BU

Removing the tuner board (See Fig.9)

Prior to performing the following procedure, remove the right and left side grilles, the front cabinet assembly.

1.Disconnect the card wire from connector CN403 on the microcomputer board.

2.Remove the screw E attaching the tuner board holder and pull out the tuner board holder together with the tuner board. Disconnect the antenna wire from TP1.

Remove the power transformer assembly

(See Fig.10)

Prior to performing the following procedure, remove the right and left side grilles, the front cabinet assembly, the cassette mechanism assembly and the cassette chassis.

1.Disconnect the harness from connector CN192 and CN193 on the power supply board respectively.

2.Remove the four screws F attaching the power transformer assembly.

Remove the amplifier board, the power supply board and the battery board

(See Fig.11)

Prior to performing the following procedure, remove the right and left side grilles, the front cabinet assembly, the cassette mechanism assembly, the cassette chassis and the CD unit assembly.

1.Disconnect the 5pin harness from connector CN191 on the power supply board.

2.Remove the two screws G and the one screw H attaching the amplifier board.

3.Disconnect the harness from connector CN192 and CN193 on the power supply board respectively.

4.Remove the two screws I attaching the power supply board.

5.Pull out the battery board.

1-8

Microcomputer board

CN403

Antenna wire

TP1

Tuner board holder			E
			Tuner board
			Fig.9
	Power supply board
F			CN193

					CN191
F
					CN192
	Power transformer assembly
					Fig.10
Power supply board					H G
CN192			I
	CN193						CN631

CN191

Amplifier board CN631 Battery board

Fig.11

RV-B550BU

<CD unit assembly>

Key switch board

Removing the microcomputer board

	(See Fig.12 and 13)
1.	Disconnect the card wire from connector CN251 and
	CN252 on the key switch board on the front side of
	the CD unit assembly.
2.	Remove the four screws J attaching the microcomputer
	board on the underside of the CD unit assembly.
3.	Disconnect the card wire or the harness from	CN252		Microcomputer board		CN251
	connector CN601, CN602 and CN907 on the
					Fig.12
	microcomputer board respectively.
		J					J

Microcomputer board

CN601	CN907

J J

CN602 Fig.13

Removing the key switch board

(See Fig.14 and 15)

Prior to performing the following procedure, remove the microcomputer board.

1.Release the four tabs a fixing the right and left function buttons and the three tabs b by the key switch board.

Push tabs a and b in the directions of the arrows carefully not to damage the function buttons

2.Remove the six screws K attaching the key switch board.

3.Pull out the key switch board from two tabs c.

								a
a
		Push				Push Push a
b
		Push				Push
				Key switch board b
Function switch buttons						Function switch buttons
			(power)		Fig.14		(volume)
K							K

c

Key switch board

c

Fig.15

1-9