Panasonic AKX12LB-K Schematic

Model No. SA-AKX12PH

Product Color: (K)...Black Type

Please refer to the original service manual for:

O CD Mechanism Unit (BRS1C), Order No. PSG1102001CE O Speaker system SB-AKX12PN-K, Order No. PSG1102026CE

PSG1102024CE

CD Stereo System

SA-AKX12PN

TABLE OF CONTENTS

1 Safety Precautions----------------------------------------------- 3

1.1. General Guidelines---------------------------------------- 3

1.2. Before Use (For PH only)-------------------------------- 3

1.3. Caution For Fuse Replacement------------------------ 3

1.4. Before Repair and Adjustment------------------------- 4

1.5. Protection Circuitry---------------------------------------- 4

1.6. Safety Parts Information --------------------------------- 5

2 Warning-------------------------------------------------------------- 6

2.1. Prevention of Electrostatic Discharge (ESD) to Electrostatic Sensitive (ES) Devices -------------- 6

2.2. Precaution of Laser Diode------------------------------- 7

2.3. Service caution based on Legal restrictions-------- 8

2.4. Handling Precautions for Traverse Unit-------------- 9

3 Service Navigation----------------------------------------------11

PAGE PAGE

3.1. Service Information-------------------------------------- 11

4 Specifications ----------------------------------------------------12 5 Location of Controls and Components------------------ 13

5.1. Main Unit Key Button Operation----------------------13

5.2. Remote Control Key Button Operation ------------- 14

5.3. Media Information---------------------------------------- 15

6 Self-Diagnostic and Special Mode Setting -------------16

6.1. Cold-Start --------------------------------------------------16

6.2. Doctor Mode Table---------------------------------------17

6.3. Reliability Test Mode (CD Mechanism Unit (BRS1C))--------------------------------------------------- 20

6.4. Self-Diagnostic Mode -----------------------------------21

6.5. Self-Diagnostic Error Code Table--------------------21

6.6. Sales Demonstration Lock Function ---------------- 22

7 Troubleshooting Guide----------------------------------------23

7.1. Troubleshooting Guide for F61 and/or F76--------23

7.2. Part Location ----------------------------------------------24

7.3. D-Amp IC Operation & Control -----------------------26

8 Disassembly and Assembly Instructions---------------28

8.1. Disassembly Flow Chart--------------------------------29

8.2. Main Components and P.C.B. Locations-----------30

8.3. Disassembly of Top Cabinet---------------------------31

8.4. Disassembly of Tuner P.C.B.--------------------------32

8.5. Disassembly of Front Panel Unit---------------------32

8.6. Disassembly of Panel P.C.B.--------------------------34

8.7. Disassembly of Remote Sensor P.C.B.-------------35

8.8. Disassembly of LCD P.C.B.----------------------------36

8.9. Disassembly of USB P.C.B. ---------------------------37

8.10. Disassembly of CD Lid----------------------------------37

8.11. Disassembly of Main P.C.B.---------------------------38

8.12. Replacement of Voltage Regulator IC (IC2010) ----------------------------------------------------39

8.13. Replacement of Audio Digital Amp IC (IC5902) ----------------------------------------------------40

8.14. Disassembly of SMPS P.C.B. -------------------------42

8.15. Replacement of Switching Regulator IC (IC5701) ----------------------------------------------------43

8.16. Replacement of Rectifier Diode (D5702)-----------44

8.17. Replacement of Rectifier Diode (D5801)-----------46

8.18. Replacement of Rectifier Diode (D5802)-----------47

8.19. Replacement of Regulator Diode (D5803)---------48

8.20. Disassembly of CD Mechanism Unit (BRS1C) ---49

8.21. Disassembly of Rear Panel----------------------------51

8.22. Disassembly of Voltage Selector P.C.B.------------52

9 Replacement of Traverse Unit------------------------------54

9.1. Disassembly of Traverse Unit-------------------------54

9.2. Assembly of Traverse Unit-----------------------------56

9.3. Disassembly of CD Servo P.C.B.--------------------- 58

10 Service Position-------------------------------------------------61

10.1. Checking and Repairing of Main P.C.B. ------------61

10.2. Checking and Repairing of Panel P.C.B.-----------61

10.3. Checking and Repairing of LCD P.C.B.-------------62

10.4. Checking and Repairing of SMPS P.C.B.---------- 62

10.5. Checking and Repairing of CD Servo P.C.B.------63

11 Voltage & W a ve form Chart-----------------------------------64

11.1. CD Servo P.C.B.------------------------------------------64

1 1 .2. Main P.C.B. (1/2) -----------------------------------------65 1 1 .3. Main P.C.B. (2/2) -----------------------------------------66 1 1 .4. LCD P.C.B.-------------------------------------------------67

11.5. Tuner P.C.B.-----------------------------------------------67

1 1 .6. SMPS P.C.B. ----------------------------------------------68

11.7. Waveform Table ------------------------------------------69

12 Illustration of ICs, Transistor and Diode ----------------70 13 Simplified Block Diagram ------------------------------------71

13.1. Overall Simplified Block Diagram--------------------71

13.2. Power Block Diagram-----------------------------------72

14 Block Diagram ---------------------------------------------------73

14.1. Servo & System Control--------------------------------73

14.2. Audio --------------------------------------------------------74

14.3. Power Supply ---------------------------------------------75

15 Wiring Diagram --------------------------------------------------76 16 Schematic Diagram---------------------------------------------77

16.1. Schematic Diagram Notes-----------------------------77

16.2. CD Servo Circuit------------------------------------------79

16.3. Main Circuit------------------------------------------------81

16.4. Panel, LCD, Remote Sensor & USB Circuit ------ 85

16.5. Tuner & Voltage Selector Circuit--------------------- 86

16.6. SMPS Circuit---------------------------------------------- 87

17 Printed Circuit Board------------------------------------------ 89

17.1. CD Servo P.C.B. ----------------------------------------- 89

17.2. M ain & Tuner P.C.B. ------------------------------------ 90

17.3. Panel, LCD, Remote Sensor & USB P.C.B.------- 91

17.4. SMPS & Voltage Selector P.C.B. -------------------- 92

17.5. SMPS P.C.B.---------------------------------------------- 93

18 Terminal Function of ICs------------------------------------- 95

18.1. IC2003 (RFKWMAKX12M0): IC MICROPROCESSOR -------------------------------------------- 95

18.2. IC900(C0HBA0000295): IC FL Driver-------------- 96

19 Exploded View and Replacement Parts List----------- 97

19.1. Exploded View and Mechanical replacement Part List ---------------------------------------------------- 97

19.2. Electrical Replacement Part List--------------------103

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 th e chassis, the reading should be between 1MΩ and 5.2MΩ. 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 1.5kΩ, 10 watts resistor, in parallel with a 0.15µF 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 th e 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 equiva lent) 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

1.2. Before Use (For PH only)

Be sure to disconnect the mains cord before adjusting the voltage selector. Use a minus(-) screwdriver to set the voltage selector (on the rear panel) to the voltage setting for the area in which the unit will be used. (If the power supply in your area is 110V ~ 127V or 220V ~ 240V, set to the “110V ~ 127V or 220V ~ 240V” position.) Note that this unit will be seriously damaged if this setting is not made correctly. (There is no voltage selector for some countries, the correct voltage is already set.)

1.3. Caution For Fuse Replacement

1.4. Before Repair and Adjustment

Disconnect AC power to discharge unit AC Capacitors as such (C5700,C5 701, C5703 , C570 4, C5705, C57 08) 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 110~127 V, 60 Hz in Power ON, FM Tuner, No Signal, volume minimal mode should be ~ 400 mA. Current consumption at AC 220~240 V, 50 Hz in Power ON, FM Tuner, No Signal, volume minimal mode should be ~ 300 mA.

1.5. 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.

1.6. 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.

Safety Ref No. Part No. Part Name & Description Remarks

4 REXX1122 1P BLACK WIRE (VOLTAGE SELECTOR-SMPS) PH

5 REXX1123 1P RED WIRE (VOLTAGE SELECTOR-SMPS) PH

8 RGRX1008A-A REAR PANEL PN

8 RGRX1008B-A REAR PANEL PH

14 RKMX1011-K TOP CABINET

301 RAEX1033Z-V TRAVERSE ASS'Y

A2 K2CB2CB00021 AC CORD PN

A2 K2CQ2CA00007 AC CORD PH

A3 RQTX1286-M O/I BOOK (Sp/En) PN

A3 RQTX1288-M O/I BOOK (Sp) PH

PCB8 REPX0886A SMPS P.C.B. (RTL) PN

PCB8 REPX0886C SMPS P.C.B. (RTL) PH

PCB9 REPX0886C VOLTAGE SELECTOR P.C.B. (RTL) PH

DZ5701 ERZVA5Z471 DIODE

S5701 K0ABCA000007 SW VOLT ADJ PH

L5701 G0B612H00002 LINE FILTER

T5701 ETS39AG4M6AD MAIN TRANSFORMER PH

T5701 ETS39AG4NGAD MAIN TRANSFORMER PN

T5751 ETS19AB2E6AG SUB TRANSFORMER

PC5701 B3PBA0000503 PHOTO COUPLER

PC5702 B3PBA0000503 PHOTO COUPLER

PC5720 B3PBA0000503 PHOTO COUPLER

PC5799 B3PBA0000503 PHOTO COUPLER

F1 K5D632BK0007 FUSE PH

F1 K5D802APA008 FUSE PN

TH5702 D4CAA2R20001 THERMISTOR

TH5860 D4CC11040013 THERMISTOR

TH5900 D4CC11040013 THERMISTOR

P5701 K2AA2B000011 AC INLET PH

P5701 K2AB2B000007 AC INLET PN

R5708 ERJ8GEYJ155V 1.5M 1/4W

R5709 ERJ8GEYJ155V 1.5M 1/4W

C5700 F1BAF471A013 470pF

C5701 F0CAF104A105 0.1uF

C5703 F0CAF224A105 0.22uF

C5704 F1BAF471A013 470pF

C5705 F1BAF471A013 470pF

C5708 F1BAF1020020 1000pF

2Warning

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 da mage 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 lif ting of your foot from a carpeted floor can generate static electricity (ESD) suf-

ficient 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.

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 compone nts 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 mainl y consists of tin (Sn), silver (Ag) and Copper (Cu), and the melting point of the lead free solder is higher approx.30 degrees C (86°F) 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 pu t 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) equi pped with the temperature co ntrol after setting the temp erature at 350±30 degrees C (662±86°F).

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%

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 b ody. 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 un it 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 prev ent 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.

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.

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 wil l be fol lowed by supplemen t service manual to be filed with original se rvice manual.

• CD Mechanism Unit (BRS1C):

1) This model uses CD Mechanism Unit (BRS1C).

• Micro-processor:

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

- Micro-processor IC, IC2003 (RFKWMAKX12M0)

• Speaker System:

1) This model uses Speaker System, SB-AKX12PN-K.

4 Specifications

Q AMPLIFIER SECTION RMS output power stereo mode

Front (both channels driven)

125 W per channel (4 Ω), 1 kHz, 10% THD Total RMS stereo mode power 250 W PMPO output power (For PN only) 2800 W

Q FM/AM TUNER, TERMINALS SECTION Preset station FM 30 stations AM 15 stations Frequency Modulation (FM)

Frequency range For PH only 87.50 to 108.00 MHz (50 kHz step) For PN only 87.9 to 107.9 MHz (200 kHz step)

87.5 to 108.0 MHz (100 kHz step)

Antenna terminal (s)

75 Ω (unbalanced)

Amplitude Modulation (AM)

Frequency range For PH only 522 to 1629 kHz (9 kHz step)

520 to 1630 kHz (10 kHz step)

For PN only 520 to 1710 kHz (10 kHz step)

AUX Input

RCA pin jack

Q DISC SECTION Discs played (8 cm or 12 cm)

(1) CD-Audio (CD-DA) (2) CD-R/RW (CD-DA, MP3* formatted disc) (3) MP3* *MPEG-1 layer 3

Pick up

Wavelength 790 nm(CD) Laser Power CLASS 1 (CD)

Audio output (Disc)

Number of channels 2 (FL, FR) FL = Front left channel FR = Front right channel

1. Specifications are subject to change without notice. Mass and dimensions are approximate.

2. Total harmonic distortion is measured by the digital spectrum analyzer.

Q System: SC-AKX12PH-K

Main Unit: SA-AKX12PH-K

Front Speakers: SB-AKX12PN-K

Q System: SC-AKX12PN-K

Main Unit: SA-AKX12PN-K

Front Speakers: SB-AKX12PN-K

Q USB SECTION USB Port

USB standard USB 2.0 full speed Media file format support MP3 (*.mp3) USB device file system FAT12, FAT16, FAT32 USB Port power 500 mA (max) Bit Rate 16 kbps to 320 kbps (playback)

Q GENERAL

Power supply

For PH only AC 1 10 to 127 V, 220 to 240 V, 50/60 HZ For PN only AC 120 V, 60 Hz

Power Consumption

For PH only 64 W For PN only 61 W

Dimensions (W x H x D) 220 mm x 334 mm x 245 mm Mass 3.0 kg Operating temperature range 0 °C to +40 °C Operating humidity range 35% to 80% RH

Power Consumption in standby mode

For PH only 0.3 W (Approximate) For PN only 0.2 W (Approximate)

Notes

(no condensation)

5 Location of Controls and Components

5.1. Main Unit Key Button Operation

22 11

Standby/on switch (

/l, POWER)

Press to switch the unit from on to standby mode or vice versa.In standby mode, the unit is still consuming a small amount of power.

[ / ]

[ ]

[ / ]

[ / ] [ / ][ / ]

5.2. Remote Control Key Button Operation

SLEEP

PLAY

EXT -IN

RADIO

D.BASS

DISPLA Y

DIMMER

SOUND

PRESET EQ

AUTO OFF

5.3. Media Information

6 Self-Diagnostic and Special Mode Setting

6.1. 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

6.2. Doctor Mode Table

6.2.1. Doctor Mode Table 1

Doctor Mode

EEPROM checksum check

Item

DescriptionMode Name

To enter into Doctor Mode In CD Mode:

For checking of various items and displaying EEPROM and Firmware version.

(Display 1)

(Display 2)

FL Display

Checksum (Hex)

Version (Decimal)

Key Operation

Front Key

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

2. To exit, press [POWER, /I] button on main unit or remote control.

In CD mode:

1. Enter Doctor Mode

Cold Start To active cold start upon next AC

power up when reset start is execute the next time.

ROM No. (0001 ~ 9999) specific for each ROM

In Doctor Mode:

1. Press [SLEEP] button on remote control.

6.2.2. Doctor Mode Table 2

Volume Setting Check

FL Display Check

BRS1C Reliability Test (Traverse)

Item

DescriptionMode Name

To check the volume setting of a main unit.

To check the FL segment display All segment will light up while all LED blink at 0.5s,intervals.(if any)

To determine CD Mechanism BRS1C Access Inner & Outer disc operation.

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

Note: Refer to Section 6.3 Fig 2. for process flow.

FL Display

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

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

Cancellation Display

Key Operation

Front Key

In Doctor Mode:

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

Volume

In Doctor mode:

1. Press [1] button on remote control.

2. To cancel, press [0] on remote control.

In Doctor Mode:

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

2. To cancel, press [0] on remote control.

BRS1C Reliability Test (Combination)

BRS1C Reliability Test (Loading)

To determine CD Mechanism Unit (BRS1C) Open/Close & Access Inner & Outer Disc Operation.

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

Note: Refer to Section 6.3 Fig 3. for process flow.

To determine CD Mechanism Unit (BRS1C) Open/Close operation.

In this mode, the tray will open & close.

Note: Refer to Section 6.3 Fig 1 for process flow.

In Doctor Mode:

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

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

Cancellation Display

2. To cancel, press [0] on remote control.

In Doctor Mode:

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

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

Cancellation Display

2. To cancel, press [0] on remote control.

6.2.3. Doctor Mode Table 3

Mode Name

Self- Adjustment

(AJST)

Result Display

Item

Description

i. Function: To display result of self-adjustment for CD. This is used for servicing and analysis.

FL Display

Display of auto adjustment result

Reference table:

ERROR Code Status Condition

012468ACEF

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).

Key Operation

Front Key

In Doctor Mode:

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

2.To cancel, press [0] on remote control.

CD LSI Version Check

For checking CD LSI Version and checksum information.

In Doctor Mode:

1. Press [4] button on remote control.

Version (Decimal) Checksum (Hex)

2.To cancel, press [0] on remote control.

6.3. Reliability Test Mode (CD Mechanism Unit (BRS1C))

Below is the process flow chart of the aging test for the CD Mechanism Unit (BRS1C).

OPEN Operation

OPEN wait fot 1 s

CLOSE Operation

CLOSE wait for 4s

Fig. 1. Reliability Test (Loading)

Count up

First Track

Access

First Track

Play 10 s

First Track

Access

First Track

Play 5 s

Last Track

Access

Last Track

Play 5 s

Fig. 2. Reliability Test (Traverse)

Count up

Last Track

Access

Last Track

Play 10 s

Open

Operation

Open wait

for 1 s

Operation

Fig. 3. Reliability Test (Combination)

Count up

6.4. Self-Diagnostic Mode

Mode Name

Self Diagnostic Mode

Error code information

Delete error code

Item

Description

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)

Example:

FL Display

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

Step 2: Press & hold [ ] follow by [ 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.

Key Operation

Front Key

] on main unit for 2

6.5. Self-Diagnostic Error Code Table

Self-Diagnostic Function (Refer Section 6.4. 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.

6.5.1. Power Supply Error Code Table

6.5.2. CD Mechanism Error Code Table (CD Mechanism Unit (BRS1C))

Error Code Diagnostic Contents Description of error Automatic FL Display Remarks

CD H15 CD Open Abnormal During operation

CD H16 CD Closing Abnormal During operation

F26 Communication between

CD servo LSI and micro-p abnormal.

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

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

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

6.6. Sales Demonstration Lock Function

6.6.1. 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, press and hold [ Step 3: Hold both [

OPEN/CLOSE] and [ / ] keys for 5 sec.

Step 4: The display will show upon entering into this mode.

OPEN/CLOSE] key and follow by [ / ] key within 0.5 sec.

Press [ next error.

] on main unit for

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

6.6.2. Cancellation

Step 1: To cancel only can be triggered in CD Mode and Volume 19. Step 2: Press and hold [ Step 3: Hold both [ Step 4: The display will show after exit from this mode.

OPEN/CLOSE] key and follow by [ / ] key. It must be pressed within 0.5 sec.

OPEN/CLOSE] and [ / ] keys for 5 sec.

7 Troubleshooting Guide

Refer to Section 7.2.1 Fig. 1. SMPS P.C.B.

Refer to Section 7.2.2 Fig. 2. Main P.C.B.

Refer to Section 7.2.1 Fig. 1. SMPS P.C.B.

Refer to Section

7.2.1 Fig. 1. SMPS P.C.B.

5 Switching Regulator 5 IC5701 Faulty.

6 Switching Regulator

IC, IC5799

6 IC5799 Faulty.

Set can ON

1 Speaker Output 1 Faulty speaker unit, Loose connection, Short.

Refer to Section 7.2.2 Fig. 2. Main P.C.B.

then F61

2 D-AMP circuit 2a D-AMP IC, IC5902 defective.

(DC voltage of +/-30V detected at speaker output)

Set can ON

1 Transformer T5701 1a Short circuit between Pin 14 and Pin 15.

then F76

1b Short circuit between Pin 15 and Pin 16. 1c Short circuit between Pin 16 and Pin 17.

2 DC-DC Circuit 2a

Voltage Regulator IC (IC2010) & Switching Regulator IC (IC2011 ) faulty.

3 Photocoupler 3 PC5720 solder crack,

PC5720 Dry joint, short circuit, open circuit.

1 Rectifier Diode D5801 1a Improper contact between D5801 to Heatsink.

Rectifier Diode D5802 Improper contact between D5802 to Heatsink.

2 Thermistor TH5860 1b Set trigger temperature protection.

Set can ON working normally for some time then F76

Symptom Remarks

Set cannot ON 1 AC Cord 1 AC Cord Faulty, Loose connection. Refer to

Section 7.2.1 Fig. 1. SMPS P.C.B.

22 3 Fuse, F1 3 Fuse, F1 Open. 4 Photocoupler 4 PC5702/PC5799 solder crack.

PC5702, PC5799 Dry joint, short circuit, open circuit.

Check cable wire connection between cable wire ZJ2002 (At Main P.C.B) & connector CN5802 (At SMPS P.C.B)

Possible Fault(s)Checking Items

AC Inlet, P5701 P5701 solder crack, dry joint.

IC, IC5701

7.1. Troubleshooting Guide for F61 and/or F76

This section illustrates the checking procedures when upon detectin g the error of “F6 1” and/or “F76” after power up of the unit. It is for purpose of troubleshooting and checking in SMPS & Main P.C.B.

7.2. Part Location

7.2.1. SMPS P.C.B.

Switching Regulator IC: IC5701

AC Inlet: P5701

Fuse: F1

Switching Regulator IC: IC5799

Thermistor: TH5860

Photocoupler: PC5702, PC5799

Photocoupler: PC5720

Fig. 1 SMPS P.C.B.

Transformer: T5701

Rectifier Diode D5801, D5802

Connector: CN5802

7.2.2. Main P.C.B.

Cable wire: ZJ2002

Voltage Regulator IC: IC2010

Switching Regulator IC: IC2011

Audio Digital Amp IC: IC5902

Fig. 2 Main P.C.B.

7.3. D-Amp IC Operation & Control

1170 ~ 1250 H 350 1260 ~ 1450 L 301 1460 ~ 1540 H 350 1550 ~ 1710 L 301

Table 4: F_HOP Control during 10 kHz Step

Note: During activating, the 3 control pins namely MUTE_F, MUTE_A and MODE_DA must be used to cover the “Pop” sound cause by F-HOP switching.

8 Disassembly and Assembly Instructions

• Illustration is based on SA-AKX12PH-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 Tuner P.C.B.

• Disassembly of Front Panel Unit

• Disassembly of Panel P.C.B.

• Disassembly of Remote Sensor P.C.B.

• Disassembly of LCD P.C.B.

• Disassembly of USB P.C.B.

• Disassembly of CD Lid

• Disassembly of Main P.C.B.

• Replacement of Voltage Regulator IC (IC2010)

• Replacement of Audio Digital Amp IC (IC5902)

• Disassembly of SMPS P.C.B.

• Replacement of Switching Regulator IC (IC5701)

• Replacement of Rectifier Diode (D5702)

• Replacement of Rectifier Diode (D5801)

• Replacement of Rectifier Diode (D5802)

• Replacement of Rectifier Diode (D5803)

• Disassembly of CD Mechanism Unit (BRS1C)

• Disassembly of Rear Panel

• Disassembly of Voltage Selector P.C.B.

8.1. Disassembly Flow Chart

8.3. Top Cabinet

8.4. Tuner P.C.B.

8.5. Front Panel Unit

8.6. Panel P.C.B.

8.7. Remote Sensor

P.C.B.

8.8. LCD P.C.B.

8.9. USB P.C.B.

8.10. CD Lid

8.11. Main P.C.B.

8.12. Voltage Regulator IC (IC2010)

8.13. Audio Digital Amp IC (IC5902)

8.14. SMPS P.C.B.

8.15. Switching Regulator IC (IC5701)

8.16. Rectifier Diode (D5702)

8.17. Rectifier Diode

(D5801)

8.20. CD Mechanism Unit (BRS1C)

8.21. Rear Panel

8.22. Voltage Selector P.C.B.

8.18. Rectifier Diode (D5802)

8.19. Rectifier Diode (D5803)

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

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