Panasonic SA-AKX74LM-K Schematic

PMX1207007CE

CD Stereo System

Model No. SA-AKX74LM-K

Product Color: (K)...Black Type

Please refer to the original service manual for:

CD Mechanism Unit (BRS11C), Order No. PSG1201019AE

Speaker system SB-AKX74LM-K, Order No. PMX1207006CE

© Panasonic Corporation 2012. All rights reserved. Unauthorized copying and distribution is a violation of law.

Please refer to the original service manual for:

CD Mechanism Unit (BRS11C), Order No. PSG1201019AE

Speaker system SB-AKX74LM-K, Order No. PMX1207006CE

Nota: El idioma original de este Manual de Servicio es en idioma inglés, sin embargo algunas notas aquí mencionadas serán escritas en español para mejor descripción para Centros de Servicio de México.

TABLE OF CONTENTS

1 Safety Precautions	4	Specifications
1.1. General Guidelines	5	General/Introduction
1.3. Before Repair and Adjustment		5.1. Media Information
1.4. Protection Circuitry	6	Location of Controls and Components
1.5. Caution For Fuse Replacement		6.1. Remote Control Key Button Operation
1.6. Safety Parts Information		6.2. Main Unit Key Button Operation
2 Warning	7	Installation Instructions
2.1. Prevention of Electrostatic Discharge (ESD)		7.1. Speaker and A/C Connection
to Electrostatic Sensitive (ES) Devices	8	Service Mode
2.2. Precaution of Laser Diode		8.1. Cold-Start
2.3. Service caution based on Legal restrictions		8.2. Doctor Mode Table
2.4. Handling Precautions for Traverse Unit		8.3. Reliability Test Mode (CD Mechanism Unit
3 Service Navigation		(BRS11C))
3.1. Service Information		8.4. Self-Diagnostic Mode
		8.5. Self-Diagnostic Error Code Table

2

8.6. Sales Demonstration Lock Function							16 Schematic Diagram
9 Troubleshooting Guide							16.1. Schematic Diagram Notes
9.1. Part Location							16.2. CD Servo Circuit
9.2. Troubleshooting Guide for F61 and/or F76							16.3. Main(MICON) Circuit
9.3. D-Amp IC Operation & Control							16.4. Main(D-Amp) Circuit
10 Service Fixture & Tools							16.5. Panel Circuit
11 Disassembly and Assembly Instructions							16.6. Remote Sensor, USB, Music Port , Memory
11.1. Disassembly Flow Chart							LED, Top Bar LED and Bottom Bar LED
11.2. Main Components and P.C.B. Locations							Circuit
11.3. Disassembly of Top Cabinet							16.7. CD Interface, Mic and Voltage Selector Circuit
11.4. Disassembly of Front Panel Unit							16.8. D-Amp Circuit
11.5. Disassembly of Mic P.C.B.							16.9. SMPS Circuit
11.6. Disassembly of Panel P.C.B.							17 Printed Circuit Board
11.7. Disassembly of Memory LED P.C.B.							17.1. CD Servo P.C.B.
11.8. Disassembly of Remote Sensor P.C.B.							17.2. Main P.C.B. (Side A)
11.9. Disassembly of USB P.C.B.							17.3. Main P.C.B. (Side B)
11.10. Disassembly of Music Port P.C.B.							17.4. Panel, Remote Sensor, USB and Music Port
11.11. Disassembly of Top Bar LED P.C.B.							P.C.B.
11.12. Disassembly of Bottom Bar LED P.C.B.							17.5. Memory LED, CD Interface, Top Bar LED,
11.13. Disassembly of Main P.C.B.							Bottom Bar LED and Mic P.C.B.
11.14. Replacement	of	Voltage		Regulator		IC	17.7. SMPS and D-Amp P.C.B.
(IC2010)							18 Appendix Information of Schematic Diagram
11.15. Replacement	of	Voltage		Regulator		IC	18.1. Voltage & Waveform Chart
(IC2011)							18.2. Illustration of ICs, Transistor and Diode
11.16. Replacement	of	Audio	Digital		Amp	IC	18.3. Terminal Function of ICs
(IC5800)							19 Exploded View and Replacement Parts List
11.17. Replacement	of	Audio	Digital		Amp	IC	19.1. Exploded View and Mechanical replacement
(IC5700)							Part List
11.18. Disassembly of D-Amp P.C.B.							19.2. Electrical Replacement Part List

11.19.Replacement of Audio Digital Amp IC (IC5900)

11.20.Disassembly of SMPS P.C.B.

11.21.Replacement of Switching Regulator IC (IC5701)

11.22.Replacement of Rectifier Diode (D5702)

11.23.Replacement of Rectifier Diode (D5801)

11.24.Replacement of Rectifier Diode (D5802)

11.25.Replacement of Regulator Diode (D5803)

11.26.Disassembly of CD Mechanism Unit (BRS11C)

11.27.Disassembly of CD Interface P.C.B.

11.28.Disassembly of CD Servo P.C.B.

11.29.Disassembly of Rear Panel

12 Service Position

12.1.Checking and Repairing of Main P.C.B.

12.2.Checking and Repairing of D-Amp P.C.B.

12.3.Checking and Repairing of Panel P.C.B.

12.4.Checking and Repairing of SMPS P.C.B. -

12.5.Checking and Repairing of CD Servo P.C.B. (Side A)

12.6.Checking and Repairing of CD Servo P.C.B.

(Side B)

13 Simplified Block Diagram

13.1. Power Block Diagram

14 Block Diagram

14.1.Servo & System Control

14.2.IC Terminal Chart

14.3.Audio

14.4.Power Supply

15 Wiring Connection Diagram

3

1 Safety Precautions

1.1.General Guidelines

1.When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or damaged by the short circuit.

2.After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly installed.

3.After servicing, carry out the following leakage current checks to prevent the customer from being exposed to shock hazards.

1.1.1.Leakage Current Cold Check

1.Unplug the AC cord and connect a jumper between the two prongs on the plug.

2.Measure the resistance value, with an ohmmeter, between the jumpered AC plug and each exposed metallic cabinet part on the equipment such as screwheads, connectors, control shafts, etc. When the exposed metallic part has a return path to the chassis, the reading should be between 1M: and 5.2M:.

When the exposed metal does not have a return path to the chassis, the reading must be

1.1.2.Leakage Current Hot Check

1.Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check.

2.Connect a 1.5k:, 10 watts resistor, in parallel with a 0.15ΠF capacitors, between each exposed metallic part on the set and a good earth ground such as a water pipe, as shown in Figure 1.

3.Use an AC voltmeter, with 1000 ohms/volt or more sensitivity, to measure the potential across the resistor.

4.Check each exposed metallic part, and measure the voltage at each point.

5.Reverse the AC plug in the AC outlet and repeat each of the above measurements.

6.The potential at any point should not exceed 0.75 volts RMS. A leakage current tester (Simpson Model 229 or equivalent) may be used to make the hot checks, leakage current must not exceed 1/2 milliamp. In case a measurement is outside of the limits specified, there is a possibility of a shock hazard, and the equipment should be repaired and rechecked before it is returned to the customer.

Figure 1

4

1.3.Before Repair and Adjustment

Disconnect AC power to discharge unit AC Capacitors as such (C5700, C5701, C5703, C5708) through a 10 Ω, 10 W resistor to ground.

Caution:

DO NOT SHORT-CIRCUIT DIRECTLY (with a screwdriver blade, for instance), as this may destroy solid state devices. After repairs are completed, restore power gradually using a variac, to avoid overcurrent.

Current consumption at AC 127 V, 60 Hz in Power ON, FM Tuner, No Signal, volume minimal mode should be ~ 750 mA.

1.4.Protection Circuitry

The protection circuitry may have operated if either of the following conditions are noticed:

No sound is heard when the power is turned on.

Sound stops during a performance.

The function of this circuitry is to prevent circuitry damage if, for example, the positive and negative speaker connection wires are “shorted”, or if speaker systems with an impedance less than the indicated rated impedance of the amplifier are used.

If this occurs, follow the procedure outlines below:

1.Turn off the power.

2.Determine the cause of the problem and correct it.

3.Turn on the power once again after one minute.

Note:

When the protection circuitry functions, the unit will not operate unless the power is first turned off and then on again.

1.5.Caution For Fuse Replacement

5

1.6.Safety Parts Information

Safety Parts List:

There are special components used in this equipment which are important for safety.

These parts are marked by in the Schematic Diagrams, Exploded View & Replacement Parts List. It is essential that these critical parts should be replaced with manufacturer’s specified parts to prevent shock, fire or other hazards. Do not modify the original design without permission of manufacturer.

	Modelo:	SC-AKX74LM-K
Safety	Nombre del componente			Número de Parte
	CABLE TOMACORRIENTE.			K2CB2YY00059
	CONECTOR TOMACORRIENTE			K2AB2B000007
	TRANSFORMADOR DE PODER			G4DYZ0000060
	TRANSFORMADOR DE			ETS19AB2E6AG
		RESPALDO
	FUSIBLE PRIMARIO			K5D802APA008
		ZNR		ERZV05Z471CS
	CAPACITOR DE AC			F1BAF1020020
	CAPACITOR DE AC			F0CAF224A105
	CAPACITOR DE AC			F0CAF104A105
	CAPACITOR DE AC			F1BAF471A013
	OPTOACOPLADOR			B3PBA0000579
		PCB SMPS		RJB3568A
				RJB3568A-1
	BOBINA PRIMARIO			G0B932H00002
	GAB. MET. SIN DOBLAR			RKMX1011Z-KL
	BRS1C CD UNIT			RD-DDL100-PX
		REAR PANEL		RXTM0002H-A
		INSTRUCTIVO		RQTM0189
				RQTM0189-1
	OPTOACOPLADOR			B3PBA0000503
	Nota: El Optoacoplador B3PBA0000503
	cambiara por el B3PBA0000597 con la TI
	A12031 Running Change

La pista de SMPS Cambiara Con la TI

A12037 de RJB3568A a RJB3568A -1 (

Running Change )

6

2 Warning

2.1.Prevention of Electrostatic Discharge (ESD) to Electrostatic Sensitive

(ES) Devices

Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and semiconductor "chip" components. The following techniques should be used to help reduce the incidence of component damage caused by electrostatic discharge (ESD).

1.Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any ESD on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging ESD wrist strap, which should be removed for potential shock reasons prior to applying power to the unit under test.

2.After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.

3.Use only a grounded-tip soldering iron to solder or unsolder ES devices.

4.Use only an anti-static solder removal device. Some solder removal devices not classified as “anti-static (ESD protected)” can generate electrical charge sufficient to damage ES devices.

5.Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices.

6.Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or comparable conductive material).

7.Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material to the chassis or circuit assembly into which the device will be installed.

Caution:

Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.

8.Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD) sufficient to damage an ES device).

7

2.2.Precaution of Laser Diode

Caution:

This product utilizes a laser diode with the unit turned “on”, invisible laser radiation is emitted from the pickup lens. Wavelength: 790 nm (CD)

Maximum output radiation power from pickup: 100 ΠW/VDE

Laser radiation from the pickup unit is safety level, but be sure the followings:

1.Do not disassemble the pickup unit, since radiation from exposed laser diode is dangerous.

2.Do not adjust the variable resistor on the pickup unit. It was already adjusted.

3.Do not look at the focus lens using optical instruments.

4.Recommend not to look at pickup lens for a long time.

8

2.3.Service caution based on Legal restrictions

2.3.1.General description about Lead Free Solder (PbF)

The lead free solder has been used in the mounting process of all electrical components on the printed circuit boards used for this equipment in considering the globally environmental conservation.

The normal solder is the alloy of tin (Sn) and lead (Pb). On the other hand, the lead free solder is the alloy mainly consists of tin (Sn), silver (Ag) and Copper (Cu), and the melting point of the lead free solder is higher approx.30 degrees C (86θF) more than that of the normal solder.

Definition of PCB Lead Free Solder being used

The letter of “PbF” is printed either foil side or components side on the PCB using the lead free solder.

(See right figure)

Service caution for repair work using Lead Free Solder (PbF)

•The lead free solder has to be used when repairing the equipment for which the lead free solder is used. (Definition: The letter of “PbF” is printed on the PCB using the lead free solder.)

•To put lead free solder, it should be well molten and mixed with the original lead free solder.

•Remove the remaining lead free solder on the PCB cleanly for soldering of the new IC.

•Since the melting point of the lead free solder is higher than that of the normal lead solder, it takes the longer time to melt the lead free solder.

•Use the soldering iron (more than 70W) equipped with the temperature control after setting the temperature at 350±30 degrees

C (662±86θF).

Recommended Lead Free Solder (Service Parts Route.)

•The following 3 types of lead free solder are available through the service parts route. RFKZ03D01K-----------(0.3mm 100g Reel)

RFKZ06D01K-----------(0.6mm 100g Reel) RFKZ10D01K-----------(1.0mm 100g Reel)

Note

* Ingredient: tin (Sn), 96.5%, silver (Ag) 3.0%, Copper (Cu) 0.5%, Cobalt (Co) / Germanium (Ge) 0.1 to 0.3%

9

2.4.Handling Precautions for Traverse Unit

The laser diode in the optical pickup unit may break down due to static electricity of clothes or human body. Special care must be taken avoid caution to electrostatic breakdown when servicing and handling the laser diode in the traverse unit.

2.4.1.Cautions to Be Taken in Handling the Optical Pickup Unit

The laser diode in the optical pickup unit may be damaged due to electrostatic discharge generating from clothes or human body. Special care must be taken avoid caution to electrostatic discharge damage when servicing the laser diode.

1.Do not give a considerable shock to the optical pickup unit as it has an extremely high-precise structure.

2.To prevent the laser diode from the electrostatic discharge damage, the flexible cable of the optical pickup unit removed should be short-circuited with a short pin or a clip.

3.The flexible cable may be cut off if an excessive force is applied to it. Use caution when handling the flexible cable.

4.The antistatic FPC is connected to the new optical pickup unit. After replacing the optical pickup unit and connecting the flexible cable, cut off the antistatic FPC.

10

2.4.2.Grounding for electrostatic breakdown prevention

Some devices such as the DVD player use the optical pickup (laser diode) and the optical pickup will be damaged by static electricity in the working environment. Proceed servicing works under the working environment where grounding works is completed.

2.4.2.1.Worktable grounding

1. Put a conductive material (sheet) or iron sheet on the area where the optical pickup is placed, and ground the sheet.

2.4.2.2.Human body grounding

1. Use the anti-static wrist strap to discharge the static electricity form your body.

11

3 Service Navigation

3.1.Service Information

This service manual contains technical information which will allow service personnel’s to understand and service this model. Please place orders using the parts list and not the drawing reference numbers.

If the circuit is changed or modified, this information will be followed by supplement service manual to be filed with original service manual.

•CD Mechanism Unit (BRS11C):

1)This model uses CD Mechanism Unit (BRS11C).

•Micro-processor:

1)The following components are supplied as an assembled part.

- Micro-processor IC, IC2003 (MN101EF16KXW) Este material se encuentra sin programar, debe ser programado.

•Speaker System:

1) This model uses Speaker System, SB-AKX54, SB-WAKX74LM-K.

12

4 Specifications

Sección del amplificador

AKX74

Potencia de salida RMS en modo estéreo

Canal frontal alto (ambos canales controlados)

145 W por canal (5 Ω), 1 kHz, 10% THD 190 W por canal (5 Ω), 1 kHz, 30% THD

Canal frontal bajo (ambos canales controlados)

180 W por canal (4 Ω), 1 kHz, 10% THD 235 W por canal (4 Ω), 1 kHz, 30% THD

Subwoofer Ch

250 W por canal (8 Ω), 100 Hz, 10% THD 300 W por canal (8 Ω), 100 Hz, 30% THD

Potencia total RMS del modo estéreo

	900 W (10% THD)
	1150 W (30% THD)
Potencia de salida PMPO	12700 W

Sección del sintonizador, terminales

Emisoras preconfiguradas	30 emisoras de FM
	15 emisoras de AM
Modulación de frecuencia (FM)
Gama de frecuencias

87,5 MHz a 108,0 MHz (en pasos de 100 kHz) 87,9 MHz a 107,9 MHz (en pasos de 200 kHz)

Terminales de la antena 75 Ω (desbalanceado)

Modulación de amplitud (AM)

Gama de frecuencias

520 kHz a 1710 kHz (en pasos de 10 kHz)

Toma de micrófono	0,7 mV, 1,1 kΩ
Sensibilidad
Terminal	Mono, toma de 3,5 mm
	(1 sistema)
Puerto de música (frontal)	100 mV, 4,7 kΩ
Sensibilidad
Terminal	Estéreo, toma de 3.5 mm
Entrada AUX	Clavija jack RCA

Sección de discos compactos

Discos reproducidos (8 cm o 12 cm)

				CD, CD-R/RW (CD-DA, MP3Ú)
Lector
Longitud de onda				790 nm (CD)
Potencia de láser				CLASS 1 (CD)
Salida de audio (Disco)
Número de canales
				2,1 canales (FL, FR, SW)
	AKX74
				2 canales (FL, FR)
	AKX54

FL = Canal frontal izquierdo FR = Canal frontal derecho SW = Canal de subwoofer Ú MPEG-1 Layer 3

Sección de memoria

Memoria
Tamaño de la memoria	2 GB
Compatibilidad con formato de archivos de medios
	MP3 (*.mp3)
Cómo grabar en la memoria
Velocidad de bits	128 kbps
Velocidad de grabación en la memoria
	1x, 3x (CD solamente)
Formato de archivo de grabación	MP3 (*.mp3)
Capacidad de total de canciones	510 canciones
grabadas (Usa 128 kbps,
aproximadamente 1 canción =
4 minutos)

Sección de USB

Puerto USB
Estándar USB	USB 2,0 velocidad total
Compatibilidad con formato de archivos de medios
	MP3 (*.mp3)
Sistema de archivo de dispositivo USB
	FAT12, FAT16, FAT32
Energía puerto USB	500 mA (máx.)
Velocidad de bits	16 kbps a 320 kbps
	(reproducción)
Cómo grabar en el USB
Velocidad de bits	128 kbps
Velocidad de grabación USB	1x, 3x (CD solamente)
Formato de archivo de grabación	MP3 (*.mp3)

Generalidades

Fuente de alimentación	~127 V, 60 Hz
Consumo de energía	132 W

Dimensiones (An x Al x Prf) 220 mm x 334 mm x 245 mm
Peso	3,4 kg
Gama de temperaturas de funcionamiento
	0°C a +40°C
Gama de humedades de funcionamiento
	35% a 80% humedad relativa
	(sin condensación)

Consumo de energía en modo normal

132Wh/día (considerando 1 hora de uso al día).

Consumo de energía en modo de espera

4,6Wh/día (considerando 23 horas en modo de espera al día).

Nota:

Las especificaciones están sujetas a cambios sin previo aviso.

El peso y las dimensiones son aproximados.

La distorsión armónica total se mide con el analizador 13 de espectro digital.

5 General/Introduction

5.1.Media Information

14

6 Location of Controls and Components

6.1.Remote Control Key Button Operation

15

6.2.Main Unit Key Button Operation

16

7 Installation Instructions

7.1.Speaker and A/C Connection

17

8 Service Mode

8.1.Cold-Start

Here is the procedure to carry out cold-start or initialize to shipping mode.

1.Unplug AC power cord

2.Press & hold [POWER] button

3.Plug AC power cord while [POWER] button being pressed FL Display will show “_ _ _ _ _ _ _ _”

4.Release [POWER] button

18

8.2.Doctor Mode Table

8.2.1.Doctor Mode Table 1

	Item							Key Operation
			FL Display
Mode Name	Description									Front Key
Doctor Mode	To enter into Doctor Mode							In CD Mode:
								1. Press [		] button on
								main unit follow by [4]
								and [7] on remote
								control.
								2. To exit, press [DELETE]
								button on remote control
								or, press [POWER, /I] button
								on Main Unit
EEPROM	Displaying of							In CD mode:
								1. Enter Doctor Mode
checksum	1. Year Develop.
check	2. Model Type.
	3. ROM Type.
	4. Firmware Version.
	1 2 3				4 (Decimal)
		Version No. (001 ~ 999)		specific for each firmware

Cold Start	To active cold start upon next AC
	power up when reset start is
	execute the next time .

In Doctor Mode :

1.Press [SLEEP] button on remote control.

19

8.2.2.Doctor Mode Table 2

Item

FL Display

Key Operation

Mode Name

Description

Front Key

Volume Setting

To check the volume setting of a main

In Doctor Mode :

Check

unit.

1. Press [7], [8], [9] button

on remote control.

Press [7]: VOL50

Vo lume

Press [8]: VOL35

Press [9]: VOL0

FL Display

To check the FL segment display

In Doctor mode :

1. Press [1] button on

Check

All segment will light up while all LED

remote control.

blink at 0.5s,intervals.(if any)

2. To cancel, press [0 ]

on remote control.

BRS11C Reliability

To determine CD Mechanism BRS11C

In Doctor Mode :

Test (Traverse)

Access Inner & Outer disc operation.

1. Press [10]

[1]

[2] button

on remote control.

In this mode,ensure the CD is in the

main unit.

The counter will

increment by one .

When reach 9999

will change to 0000

Cancellation Display

2. To cancel, press [0]

Note: Refer to Section 8.3 Fig 2. for

on remote control.

process flow .

BRS11C Reliability

To determine CD Mechanism Unit

In Doctor Mode :

Test

(BRS11C) Open/Close & Access Inner &

1. Press [10]

[1]

[5] button

(Combination)

Outer Disc Operation.

on remote control.

In this mode,ensure the CD is in the

main unit.

The counter will

increment by one .

When reach 9999

will change to 0000

Cancellation Display

Note: Refer to Section 8.3 Fig 3. for

2. To cancel, press [0]

on remote control .

process flow .

BRS11C Reliability

To determine CD Mechanism Unit

In Doctor Mode :

Test (Loading)

(BRS11C) Open/Close operation.

1. Press [10]

[2]

[1] button

on remote control.

In this mode, the tray will open & close.

The counter will increment by one . When reach 9999 will change to 0000

Cancellation Display

2. To cancel, press [0]

on remote control.

Note: Refer to Section 8.3 Fig 1 for

process flow .

20

8.2.3.Doctor Mode Table 3

Item

FL Display

Key Operation

Mode Name

Description

Front Key

CD

i. Function: To display result of

In Doctor Mode:

SelfAdjustment

self-adjustment for CD .

1. Press [10]

[1]

[4] button

(AJST)

This is used for servicing

on remote control .

Result Display

and analysis.

Display of auto

adjustment result

Reference table:

ERROR Code

0

1

2

4

6

8

A

C

E

F

Status

Condition

AOC1/AOC2

O

O

O

O

O

O

O

O

-

ABC2/ABC1

O

-

X

O

X

O

X

O

X

-

2nd AOC1

O

-

O

X

X

O

O

X

X

-

FAGC/T AGC

O

-

O

O

O

X

X

X

X

-

AGC2

O

-

O

O

O

O

O

O

O

O: OK ;

X: NG (In case that time out happens.)

2. To cancel, press [0]

: Either one of FO AOC, TR AOC and

on remote control .

FO coarse AGC is NG .

: If the AGC is NG (ignore others).

CD LSI

In Doctor Mode :

For checking CD LSI Version and

Ve rsion Check

checksum information.

1. Press [4] button

on remote control .

Version (Decimal )

C hecksum (Hex)

2. To cancel, press [0]

(Display 1)

on remote control .

	after
ROM Version	2 sec

(Display 2)

Year ROM Version (Decimal)

Develop Type

21

8.3.Reliability Test Mode (CD Mechanism Unit (BRS11C))

Below is the process flow chart of the aging test for the CD Mechanism Unit (BRS11C).

OPEN

Operation

OPEN wait for 1 s

CLOSE		Count up
Operation

CLOSE wait

for 4 s

Fig. 1. Reliability Test (Loading)

First Track

Access

First Track

Play 10 s

Last Track

Access

Last Track

Play 10 s

Open

Operation

Open wait

for 1 s

CLOSE

Operation

First Track

Access

First Track

Play 5 s

Last Track

Access

	Last Track		Count up
	Play 5 s

Fig. 2. Reliability Test (Traverse)

Count up

Fig. 3. Reliability Test (Combination)

22

8.4.Self-Diagnostic Mode

Item

FL Display

Key Operation

Mode Name

Description

Front Key

Self Diagnostic

To enter into self diagnostic checking

Step 1: Select CD mode

Mode

(Ensure no disc is inserted).

Step 2: Press & hold [

] follow by

[ /

] on main unit for 2

seconds.

Error code

System will perform a check on any

Example:

Step 1: In self diagnostic mode,

information

unusual/error code from the memory

Press [

] on main unit.

To exit, press [^/I] on main

unit or remote control.

Delete error

To clear the stored in memory

Step 1: In self diagnostic mode,

code

(EEPROM IC)

Press [0] on remote control.

To exit, press [^/I] on main

unit or remote control.

8.5.Self-Diagnostic Error Code Table

Self-Diagnostic Function (Refer Section 8.4. Self-Diagnostic Mode) provides information on any problems occurring for the unit and its respective components by displaying the error codes. These error code such as U**, H** and F** are stored in memory and held unless it is cleared.

The error code is automatically display after entering into self-diagnostic mode.

8.5.1.Power Supply Error Code Table

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8.5.2.CD Mechanism Error Code Table (CD Mechanism Unit (BRS11C))

Error Code	Diagnostic Contents	Descriptionof error		Automatic FL Display				Remarks
CD H15	CD Open Abnormal	During operation				Press [		] on main unit for
		POS_SW_R On fail to be
						next error.
		detected with 4 sec. Error
		No. shall be clear by force
		or during cold start.
CD H16	CD Closing Abnormal	During operation				Press [		] on main unit for
		POS_SW_CEN On fail to				next error.
		be detected with 4 sec.
		Error No. shall be clear by
		force or during cold start.
F26	Communication between	During switch to CD func-				Press [		] on main unit for
	CD servo LSI and micro-p	tion, if SENSE = “L” within				next error.
	abnormal.	failsafe time of 20ms.

8.6.Sales Demonstration Lock Function

8.6.1.Entering into sales Demo Mode

Here is the procedures to enter into Sales Demonstration Lock. Step 1: Turn on the unit.

Step 2: Select to any mode function.

Step 3: Press [ OPEN/CLOSE] key then [ / ] key at the same time,press and hold both [ OPEN/CLOSE] and [ / ] keys for 5 sec. Step 4: The display will show upon entering into this mode for 2 sec..

Note: [ OPEN/CLOSE] button is invalid and the main unit displays “LOCKED” while the lock function mode is entered.

8.6.2.Cancellation

Step 1: Turn on the unit.

Step 2: Select to any mode function.

Step 3: Press [ OPEN/CLOSE] key then [ / ] key at the same time,press and hold both [ OPEN/CLOSE] and [ / ] keys for 5 sec. Step 4: The display will show upon entering into this mode for 2 sec..

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9 Troubleshooting Guide

9.1.Part Location

9.1.1.SMPS P.C.B.

AC Inlet :

P5701

		Fuse :
		F1
	SMPS Control IC :	Photocoupler :
	IC5799
		PC5702, PC5799
Switching Regulator IC :	Thermistor :
IC5701		Sub Transformer :
	TH5861	D5798

Sub Transformer :

T5751

Rectifier Diode :

D5801, D5802

Photocoupler :

PC5720

Connector :

Main Tr ansformer :

T5701

CN5802

Fig. 1 SMPS P.C.B.

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9.1.2.Main P.C.B. (Front Side)

Fig. 2 Main P.C.B. (Front Side)

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Resistor Defective	Resistor Defective	Resistor Defective
R5805	R5804	R5702
	Resistor Defective		Resistor Defective
Resistor Defective	R5802		R5705
			Resistor Defective
R5803
			R5704
			Resistor Defective
			R5703
Audio Digital Amp IC			Audio Digital Amp IC
IC5800			IC5700

D2004

Regulator Circuit

L2000 Voltage Regulator IC

IC2011

Regulator Circuit	Regulator Circuit
Q2022	L2001

Voltage Regulator IC

IC2010

Fig. 3 Main P.C.B. (Back Side)

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9.1.3.D-AMP P.C.B.

Resistor Defective	Resistor Defective
R5922	R5921

Resistor Defective

R5917

Audio Digital

Amp IC: IC5900

Resistor Defective

R5905

Fig. 4 D-Amp P.C.B.

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9.2.Troubleshooting Guide for F61 and/or F76

This section illustrates the checking procedures when upon detecting the error of “F61” and/or “F76” after power up of the unit. It is for purpose of troubleshooting and checking in SMPS, Main & D-Amp P.C.B.

Symptom		Checking Items		Possible Fault(s)	Remarks
Set cannot ON	1	AC Cord	1	AC Cord Faulty, Loose connection.	Refer to
	2	AC Inlet, P5701	2	P5701 solder crack, dry joint.	Section 9.1.1
	3	Fuse, F1	3	Fuse, F1 Open .	Fig. 1. SMPS
	4	Photocoupler	4	PC5702/PC5799 solder crack.	P.C.B.
		PC5702, PC5799		Dry joint, short circuit, open circuit.
	5	Switching Regulator	5	IC5701 Faulty .
		IC, IC5701
	6	Main Transformer T5751	6a	T5751 Faulty.
			6b	Switching Mode Power Supply Control IC (IC5799) faulty.
			6c	D5798 faulty.
Set can ON	1	Speaker Output	1	Faulty speaker unit, Loose connection, Short.	Refer to
then F61					Section 9.1.2
	2	D -AMP circuit	2a	D-AMP IC, IC5700, IC5800, IC5900 defective.	Fig. 3. Main P.C.B.
				(Check DC voltage at speaker terminals, 3V and above defective)	and Section 9.1.3
			2b	DC Voltage ok but no sound, check DC Voltage at Pin 1 .	Fig. 4. D-Amp
				5V ok condition, 2.5V or 0V defective.	P.C.B.
			2c	2a, 2b ok but no sound, check PWM waveform at Pin 10 and Pin 14 .
				If no PWM, 12 resistors defective.
				For IC5700 (R5702, R5703, R5704, R5705).
				For IC5800 (R5802, R5803, R5804, R5805).
				For IC5900 (R5905, R5917, R5921, R5922).
Set can ON	1	Main Transformer T5701	1a	Short circuit between Pin 11 and Pin 12 .	Refer to
then F76			1b	Short circuit between Pin 13 and Pin 14 .	Section 9.1.1
			1c	Short circuit between Pin 16 and Pin 17 .	Fig. 1. SMPS
					P.C.B.
	2	Regulator Circuits	2a	IC2010 faulty (No +9V output).	Refer to
			2b	L2000 Open.	Section 9.1.2
			2c	Q2022 faulty (No +5V output).	Fig. 2. and Fig.3.
			2d	IC2014 faulty (No +3.3V output).	Main P.C.B.
			2e	IC2011 faulty (No +5V output).
			2f	L2001 Open.
	3	Photocoupler	3	PC5720 solder crack,	Refer to
		PC5720		Dry joint, short circuit, open circuit.	Section 9.1.1
					Fig. 1. SMPS P.C.B.
Set can ON	1	Rectifier Diode D5801	1a	Improper contact between D5801 to Heatsink.	Refer to Section
working normally		Rectifier Diode D5802		Improper contact between D5802 to Heatsink.
					9.1.1 Fig. 1. SMPS
for some time	2	Thermistor TH5860,	1b	Set trigger temperature protection.	P.C.B.
then F76		TH5861

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9.3.D-Amp IC Operation & Control

30