Panasonic SA-AKX76LM-K Service manual

MEX1307007CE

CD Stereo System

Model No. SA-AKX76LM-K

Product Color: (K)...Black Type

TABLE OF CONTENTS

1 Safety Precautions

1.1. General Guidelines

1.3. Before Repair and Adjustment

1.4. Protection Circuitry

1.5. Caution For Fuse Replacement

1.6. Safety Parts Information

2 Warning

2.1. Prevention of Electrostatic Discharge (ESD) to Electrostatically Sensitive (ES) Devices

2.2. Precaution of Laser Diode

2.3. Service caution based on Legal restrictions

2.4. Handling Precautions for Traverse Unit

2.5. Grounding for electrostatic breakdown prevention

3 Service Navigation

3.1. Service Information

4 Specifications 5 General/Introduction

5.1. Media Information

6 Location of Controls and Components

6.1. Remote Control Key Button Operation

6.2. Main Unit Key Button Operation

7 Installation Instructions

7.1. Speaker and A/C Connection

8 Service Mode

8.1. Cold-Start

8.2. Doctor Mode Table

8.3. Reliability Test Mode (CD M

echanism Unit)

8.4. Self-Diagnostic Mode

8.5. Self-Diagnostic Error Code Table

8.6. Sales Demonstration Lock Function

Please refer to the original service manual for:

CD Mechanism Unit , Order No. PSG1102001CE Speaker system SB-AKX76LM-K, Order No. MEX1307008CE

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.

9 Troubleshooting Guide

10 Disassembly and Assembly Instructions

10.1. Screw Types

10.2. Disassembly Flow Chart

10.3. Main Components and P.C.B. Locations

10.4. Disassembly of Top Cabinet

10.5. Disassembly of Front Panel Unit

10.6. Disassembly of Panel P.C.B., LED P.C.B. and Music Port P.C.B.

10.7. Disassembly of Remote Sensor P.C.B.

10.8. Disassembly of USB P.C.B.

10.9. Disassembly of CD Lid

10.10. Disassembly of Rear Panel

10.11. Disassembly of Main P.C.B.

10.12. Disassembly of SMPS P.C.B.

10.13. Disassembly of CD Mechanism Unit

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

10.15. Disassembly of Fan Unit

11 Service Position

11.1. Checking of Panel P.C.B.

11.2. Checking of Main P.C.B. (Side A)

11.3. Checking of Main P.C.B. (Side B)

11.4. Checking of SMPS P.C.B.

12 Block Diag

ram

12.1. Servo & System Control

12.2. Audio

12.3. Power Supply

13 Wiring Connection Diagram 14 Schematic Diagram

14.1. Schematic Diagram Notes

14.2. MAIN (CD Servo/Micon/Damp) Circuit

14.3. Panel Circuit

14.4. USB, Music Port, Memory LED & Remote Sensor Circuit

14.5. SMPS Circuit

14.6. CD Interface Circuit

15 Printed Circuit Board

15.1. Main P.C.B.

15.2. Panel, USB, Music Port & Memory LED P.C.B.

15.3. SMPS

15.4. Remote Sensor & CD Interface P.C.B.

16 Appendix Information of Schematic Diagram

16.1. Voltage & Waveform Chart

17 Exploded View and Replacement Parts List

17.1. Exploded View and Mechanical replacement Part List

17.2. Electrical Replacement Part List

1 Safety Precautions

1.1. General Guidelines

1. IMPORTANT SAFETY NOTICE

There are special components used in this equipment which are important for safety. These parts are marked by in the Schematic Diagrams, Circuit Board Layout, Exploded Views and Replacement Parts List. It is essential that these critical parts should be replaced with manufacturer’s specified parts to prevent X-RADIATION, shock, fire, or other hazards. Do not modify the original design without permission of manufacturer.

2. An Isolation Transformer should always be used during the servicing of AC Adaptor whose chassis is not isolated from the AC power line. Use a transformer of adequate power rating as this protects the technician from accidents resulting in personal injury from electrical shocks. It will also protect AC Adaptor from being damaged by accidental shorting that may occur during servicing.

3. 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.

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

5. After servicing, make 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 0.15PF capacitors, between each exposed metallic part on the set and a good earth ground such as a water pipe, as shown in Figure 1-1.

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 1-1

1.3. Before Repair and Adjustment

Disconnect AC power to discharge unit AC Capacitors as such (C5700, C5701, C5703, C5704, C5705, C5706, C5707, 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 FM Tuner at volume minimum should be ~ 500 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

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-AKX76LM

Safety

K5D802APA008

F0CAF104A105

TRANSFORMADOR DE

RESPALDO

G4DYZ0000064

CONECTOR TOMACORRIENTE

Nombre del componente

K2CB2CB00022

K2AB2B000007

G4DYZ0000070

TRANSFORMADOR DE PODER

CAPACITOR DE AC

F1BAF471A013

Numero de Parte

OPTOACOPLADOR

BRS1.1C CD UNIT

FUSIBLE PRIMARIO

CAPACITOR DE AC

BOBINA PRIMARIO

ZNR

CABLE TOMACORRIENTE.

D4EAY511A127

PCB SMPS

G0B932H00003

B3PBA0000579

RJB3682A

GAB. MET. SIN DOBLAR

GAB. MET. DOBLADO

RXRM0004

RXTM0004D

INSTRUCTIVO

RQTM0201

RKMX1011Z-KL1

RD-DDL106-PX

REAR PANEL

2 Warning

2.1. Prevention of Electrostatic Discharge (ESD) to Electrostatically Sensi-

tive (ES) Devices

Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices.

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).

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 µW/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.

Figure 2-1

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 (86qF) more than that of the normal solder.

Definition of PCB Lead Free Solder being used

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±86qF).

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%

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

(See right figure)

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.

Figure 2-2

2.5. Grounding for electrostatic breakdown prevention

• As for parts that use optical pick-up (laser diode), the optical pick-up is destroyed by the static electricity of the working environment. Repair in the working environment that is grounded.

2.5.1. Worktable grounding

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

2.5.2. Human body grounding

• Use the anti-static wrist strap to discharge the static electricity form your body Figure 2-3

Figure 2-3

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.

• Micro-processor:

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

- Micro-processor IC, IC2006 (RFKWMAKX56LM) grabado del modelo base SA-AKX56PN.

- Micro-processor IC, IC2006 (MN101EF16ZXW) * Este material se encuentra sin programar, necesita ser programado.

3.1.1. Firmware Update Procedure

Start

Write encrypted UPD bin to CD-R

Turn On main set

Insert CD-R (with UPD bin) and

TOC reading

Writing starts:

"0%" -> "20%" -> "40%" ->

"60%" -> "80%" -> 100%"

"CHECKING"

"GOOD" display 3 sec

Set auto turn Off -> Cold Start

End

"NO PLAY"

process end

4 Specifications

Sección del amplificador

Potencia de salida RMS en modo estéreo

Frontal Alto 250 W por canal (3 ), 1 kHz, 30% THD Frontal Bajo 250 W por canal (3



), 100 Hz, 30% THD

Canal de subwoofer

400 W por canal (2



), 100 Hz, 30% THD

Potencia total del modo estéreo RMS

1400 W (30% THD)

Sección del sintonizador, terminales

Memoria preconfigurada

30 emisoras de FM 15 emisoras de AM

Frecuencia modulada (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)

Amplitud modulada (AM)

Gama de frecuencias

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

Puerto de música (frontal)

Sensibilidad 100 mV, 4,7 k



Terminal Estéreo, toma de 3,5 mm

Entrada AUX

Clavija jack RCA

AKX76

Sección de discos compactos

Discos reproducidos (8 cm o 12 cm)

CD, CD-R/RW (CD-DA, MP3 )

Lector

Longitud de onda 790 nm (CD)

Salida de audio (disco)

Número de canales

2,1 canales (FL, FR, SW)

2 canales (FL, FR) FL = Canal frontal izquierdo FR = Canal frontal derecho SW = Canal de subwoofer

MPEG-1 Layer 3

Sección de memoria interna

Memoria

Tamaño de la memoria 2 GB Compatibilidad con formato de archivos de medios

MP3 (

.mp3)

Grabación en memoria interna

Velocidad de bits 128 kbps Velocidad de grabación en la memoria

1x, 3x máx. (CD solamente)

Formato de archivo de grabación MP3 (

.mp3) Capacidad de total de canciones grabadas (usa 128 kbps, aproximadamente 1 canción = 4 minutos)

510 canciones

Sección de USB

Puerto USB

USB estándar USB 2,0 velocidad total Compatibilidad con formato de archivos de medios

MP3 (

.mp3) Sistema de archivo de dispositivo USB

FAT12, FAT1 6, FAT32 Energía puerto USB 500 mA (máx.) Velocidad de bits 16 kbps a 320 kbps (reproducción)

AKX76

AKX56

Grabación en USB

Velocidad de bits 128 kbps Velocidad de grabación USB

1x, 3x máx. (CD solamente)

Formato de archivo de grabación MP3 (

.mp3)

Sección de bafles

Bafles (SB-AKX76)

Tipo

Sistema de 3 bocinas de 3 vías

(reflejo de sonidos graves)

Bocina(s)

Súper Woofer Tipo cónico de 20 cm Bocina para graves Tipo cónico de 8 cm Bocina para agudos Tipo cónico de 6 cm

Impedancia

Alto 3



/ Bajo 3



Presión acústica de salida

86 dB/W (1 m)

Gama de frecuencias

42 Hz a 28 kHz (–16 dB) 46 Hz a 23 kHz (–10 dB)

Dimensiones (An x Al x Prf)

300 mm x 401 mm x 268 mm

Peso

5,5 k

Subwoofer (SB-AKW76)

Tipo

Sistema de 1 bocina de 1 vía

(reflejo de sonidos graves)

Bocina(s)

Súper Woofer Tipo cónico de 25 cm

Impedancia



Presión acústica de salida

83 dB/W (1 m)

Gama de frecuencias

40 Hz a 250 Hz (–16 dB) 43 Hz a 200 Hz (–10 dB)

Dimensiones (An x Al x Prf)

320 mm x 401 mm x 286 mm

Peso

6,9 k

Generalidades

Fuente de alimentación

127 V, 60 Hz

Consumo de energía

120 W

Dimensiones (An x Al x Prf)

220 mm x 334 mm x 250 mm

Peso

3,4 k

Gama de temperaturas de funcionamiento

0°C a +40°C

Gama de humedades de funcionamiento

35% a 80% humedad relativa (sin condensación)

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 de

espe

ctro digital.

120Wh/día (considerando 1 hora de uso al día).

Consumo de energía en modo normal

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

Consumo de energía en modo de espera

5 General/Introduction

5.1. Media Information

6 Location of Controls and Components

6.1. Remote Control Key Button Operation

6.2. Main Unit Key Button Operation

7 Installation Instructions

7.1. Speaker and A/C Connection

Cómo realizar las conexiones

Conecte el cable de alimentación de ~ sólo después de haber hecho todas las demás conexiones.

Las ilustraciones mostradas son de SC-AKX76. Su unidad puede diferir en apariencia.

Conecte la antena de cuadro AM.

Ponga la antena en posición vertical sobre su base hasta que haga clic.

Conecte la antena interior FM.

Coloque la antena donde la recepción sea la mejor.

Conecte los bafles.

Conecte los cables del bafle a las terminales del mismo color.

Conecte el cable de alimentación de

No use un cable de alimentación de ~ de otro equipo.

Cómo ahorrar energía

El sistema consume una pequeña cantidad de corriente alterna, incluso cuando está en modo de espera. Desconecte la fuente de alimentación cuando no use el sistema. Se perderán algunas configuraciones cuando desconecte el sistema. Tendrá que configurarlas nuevamente.

Cinta adhesiva

AKX76

AKX76 AKX56

AKX76

Del enchufe de conexión a la red de

Corriente alterna =

Para México: ca ó Vca

Símbolo universal:



En este instructivo nos referiremos a la corriente

alterna como



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

8.2. Doctor Mode Table

8.2.1. Doctor Mode Table 1

FL Display

Key Operation

Front Key

Item

DescriptionMode Name

Doctor Mode

EEPROM checksum check

To enter into Doctor Mode In CD Mode:

1. Press [ ] button on main unit follow by [4] and [7] on remote control.

In CD mode:

1. Enter into Doctor Mode

2. To exit, press [DELETE] button on remote control or, press [POWER, /I] button on Main Unit

Displaying of

1. Year Develop.

2. Model Type.

3. ROM Type.

4. Firmware Version.

(Display 1)

Version No. (001 ~ 999) specific for each firmware

(Decimal)1 2 3 4

(Display 2)

Checksum (Hex)

8.2.2. Doctor Mode Table 2

FL Display

Key Operation

Front Key

Item

DescriptionMode Name

Volume Setting Check

FL Display Check

To check the volume setting of the main unit.

To check the FL segment display. All segments will light up while all LED blink at 0.5s intervals.

In Doctor Mode:

1. Press [7], [8], [9] button on the remote control.

In Doctor mode:

1. Press [1] button on the remote control.

2. To cancel this mode, press [0] button on the remote control.

Press [7]: VOL50 Press [8]: VOL35 Press [9]: VOL0

Volume

In this mode, the tray will open & close automatically.

Cancellation Display

Loading Test To determine the open & close

operation of the CD Mechanism Unit.

Note: Refer to Section 8.3 Figure 8-2 for process flow

Note: Refer to Section 8.3 Figure 8-3 for process flow

Note: Refer to Section 8.3 Figure 8-1 for process flow

The counter will increment by one. When reach 99999999 will change to 00000000

Cancellation Display

Traverse Test To determine the traverse unit

operation for inner & outer access track.

The counter will increment by one. When reach 99999999 will change to 00000000

Cancellation Display

Reliability Test (Combination)

In this mode,ensure the CD is in the main unit.

To determine the traverse unit operation & open/close operation of the mechanism.

In this mode,ensure the CD is in the main unit.

In Doctor Mode:

1. Press [10] [2] [1] button on the remote control.

In Doctor Mode:

2. To cancel this mode, press [0] button on the remote control.

1. Press [10] [1] [2] button on the remote control.

In Doctor Mode:

1. Press [10] [1] [5] button on the remote control.

2. To cancel this mode, press [0] button on the remote control.

8.2.3. Doctor Mode Table 3

FL Display

Key Operation

Front Key

Item

DescriptionMode Name

Self- Adjustment

Test

To display result of self-adjustment for CD.

CD LSI Version Check

For checking CD LSI Version and checksum information.

In Doctor Mode

1. Press [10] [1] [4] button on the remote control.

In Doctor Mode:

1. Press [4] button on the remote control.

Display of auto adjustment result

Reference table:

ERROR Code Status Condition

0 1 2 4 6 8 A C E F

AOC1/AOC2 O O O O O O O O -

ABC2/ABC1 O - X O X O X O X -

AOC1 O - O X X O O X X -

FAGC/TAGC 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.) : Either one of FO AOC, TR AOC and FO coarse AGC is NG. : If the AGC is NG (ignore others).

To cancel this mode, press [0] button on the remote control.

(Display 1)

(Display 2)

Version (Decimal)

ROM Type

Year Develop

after 2 sec

Checksum (Hex)

8.3. Reliability Test Mode (CD Mechanism Unit)

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

Fig. 1. Reliability Test (Loading)

Fig. 2. Reliability Test (Traverse)

Fig. 3. Reliability Test (Combination)

OPEN Operation

OPEN wait for 1 s

CLOSE Operation

CLOSE wait for 4 s

Count up

First Track

Access

First Track

Play 5 s

Last Track

Access

Last Track

Play 5 s

Count up

First Track

Access

Play 10 s

Open

Operation

Open wait

for 1 s

Operation

Count up

First Track

Last Track

Play 10 s

8.4. Self-Diagnostic Mode

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

FL Display

Key Operation

Front Key

Item

Description

Mode Name

To enter into self diagnostic checking

System will perform a check on any unusual/error code from the memory

To clear the stored in memory (EEPROM IC)

Self Diagnostic Mode

Error code information

Delete error code

Step 1: Select CD mode (Ensure no disc is inserted).

Step 2: Press & hold [ ] button follow by [ ] on main unit for 2 seconds.

Step 1: In self diagnostic mode, Press [ ] on main unit.

To exit, press [^/I] on main unit or remote control.

Step 1: In self diagnostic mode, Press [0] on remote control.

To exit, press [^/I] on main unit or remote control.

Example:

Cold Start To active cold start upon next AC

power up when reset start is execute the next time.

In self diagnostic mode:

1. Press [3] button on the remote control.

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

8.6. Sales Demonstration Lock Function

8.6.1. Entering into Sales demonstration lock mode

Here is the procedures to enter into the Sales demonstration lock mode. Step 1: Turn on the unit. Step 2: Select to any mode function.

Step 3: Press and hold [

OPEN/CLOSE] and [CD] keys for 5 sec or more.

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 of Sales demonstration lock mode

Step 1: Turn on the unit. Step 2: Select to any mode function. Step 3: Set volume to Vol 19.

Step 4: Press and hold [

OPEN/CLOSE] and [CD] keys for 5 sec or more.

The display will show upon entering into this mode for 2 sec..

Error Code Diagnostic Contents Description of error Automatic FL Display Remarks

CD H15 CD Open Abnormal During operation

POS_SW_R On fail to be detected with 4 sec. Error No. shall be clear by force or during cold start.

Press [

] on main unit for

next error.

CD H16 CD Closing Abnormal During operation

POS_SW_CEN On fail to be detected with 4 sec. Error No. shall be clear by force or during cold start.

Press [

] on main unit for

next error.

F26 Communication between

CD servo LSI and micro-p abnormal.

During switch to CD function, if SENSE = “L” within failsafe time of 20ms.

Press [

] on main unit for

next error.

9 Troubleshooting Guide

"Contents for this section is not available at time of issue"

10 Disassembly and Assembly Instructions

• Illustration is based on SA-AKX76PH-K.

Caution Note:

• This section describes the disassembly and/or assembly procedures for all major printed circuit boards & main components for the unit. (You may refer to the section of “Main components and P.C.B Locations” as described in the service manual)

• Before carrying out the disassembly process, please ensure all the safety precautions & procedures are followed.

• During the disassembly and/or assembly process, please handle with care as there may be chassis components with sharp edges.

• Avoid touching heatsinks due to its high temperature after prolong use. (See caution as described below)

• During disassembly and assembly, please ensure proper service tools, equipments or jigs is being used.

• During replacement of component parts, please refer to the section of “Replacement Parts List” as described in the service manual.

• Select items from the following indexes when disassembly or replacement are required.

• Disassembly of Top Cabinet

• Disassembly of Front Panel Unit

• Disassembly of Panel P.C.B., LED P.C.B. and Music Port P.C.B.

• Disassembly of Remote Sensor P.C.B.

• Disassembly of USB P.C.B.

• Disassembly of CD Lid

• Disassembly of Rear Panel

• Disassembly of Main P.C.B.

• Disassembly of SMPS P.C.B. and Voltage Selector P.C.B.

• Disassembly of CD Mechanism Unit

• Disassembly of CD Interface P.C.B.

• Disassembly of Fan Unit

10.1. Screw Types

10.2. Disassembly Flow Chart

10.4.

Top Cabinet

10.11. Main P.C.B.

10.10. Rear Panel

10.5 Front Panel Unit

10.13. CD Mechanism Unit

10.14. CD Interface P.C.B.

10.12. SMPS P.C.B. and

10.19.

10.6.

Fan Unit

10.7.

Panel P.C.B., LED P.C.B. and Music Port P.C.B.

10.8.

Remote Sensor P.C.B.

10.9.

USB P.C.B.

CD Lid

10.3. Main Components and P.C.B. Locations

10.4. Disassembly of Top Cabinet

Step 1 Remove 2 screws on each side.

Step 2 Remove 5 screws. Step 3 Slightly release both side of Top Cabinet outwards as

arrow shown.

Step 4 Slightly lift up the Top Cabinet in an outward direction as shown.

Step 5 Remove the Top Cabinet.

Caution: During assembling, ensure that the Top Cabinet catches are properly inserted into the Front Panel Unit.

10.5. Disassembly of Front Panel Unit

• Refer to “Disassembly of Top Cabinet”.

Step 1 Detach 30P FFC at the connector (CN2004) on Main

P.C.B.. Step 2 Detach 5P Cable at the connector (CN2001) on Main P.C.B..

Step 3 Remove 1 screw.

Step 4 Release tab at the left side of the Front Panel Unit.

Step 5 Release tab at the right side of the Front Panel Unit.

Step 6 Release tabs at bottom.

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