Panasonic SA-AKX58, SA-AKX78 Schematic

Model No. SA-AKX58PH

SA-AKX58PN SA-AKX58GN SA-AKX78PH SA-AKX78PN

Product Color: (K)...Black Type

Please refer to the original service manual for:

O CD Mechanism Unit, Order No. PSG1303059AE O Speaker system SB-AKX78PN-K, Order No. PSG1403012CE O Speaker system SB-AKW78PN-K, Order No. PSG1403012CE (For AKX78)

PSG1403011CE

CD Stereo System

TABLE OF CONTENTS

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

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

1.2. Before Use (For PH only)-------------------------------- 4

1.3. Before Repair and Adjustment ------------------------- 4

1.4. Protection Circuitry---------------------------------------- 5

1.5. Power Supply using SMPS ----------------------------- 5

1.6. Safety Parts Information --------------------------------- 7

2 Warning-------------------------------------------------------------- 8

2.1. Prevention of Electrostatic Discharge (ESD) to Electrostatically Sensitive (ES) Devices---------- 8

2.2. Precaution of Laser Diode------------------------------- 8

2.3. General description about Lead Free Solder (PbF)---------------------------------------------------------- 9

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

PAGE PAGE

2.5. Grounding for electrostatic breakdown prevention-------------------------------------------------- 10

3 Se rvice Navigation --------------------------------------------- 11

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

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

5.1. Remote Control Key Button Operation ------------- 13

5.2. Main Unit Key Button Operation----------------------14

6 Service Mode ----------------------------------------------------- 15

6.1. Cold-Start --------------------------------------------------15

6.2. Sales Demonstration Lock Function ---------------- 15

6.3. Service Mode Table -------------------------------------16

6.4. Doctor Mode Table---------------------------------------17

6.5. Self-Diagnostic Mode -----------------------------------20

6.6. Self-Diagnostic Error Code Table --------------------20

7 Troubleshooting Guide----------------------------------------22 8 Disassembly and Assembly Instructions---------------23

8.1. Type of Screws -------------------------------------------23

8.2. Disassembly Flow Chart--------------------------------23

8.3. Main Components and P.C.B. Locations-----------24

8.4. Disassembly of Top Cabinet---------------------------25

8.5. Disassembly of Front Panel Unit-----------------25

8.6. Di sassembly of Panel P.C.B. and Music Port P.C.B.--------------------------------------------------------26

8.7. Disassembly of Bluetooth P.C.B.---------------------27

8.8. Disassembly of USB P.C.B. ---------------------------27

8.9. Disassembly of Rear Panel.---------------------------28

8.10. Disassembly of Main P.C.B.---------------------------29

8.11. Disassembly of SMPS P.C.B. and Voltage Selector P.C.B.--------------------------------------------30

8.12. Disassembly of CD Mechanism Unit----------- 3 1

8.13. Disassembly of CD Interface P.C.B.-----------------32

9 Service Position-------------------------------------------------33

9.1. Checking of Panel P.C.B. and Main P.C.B. --------33

9.2. Checking of SMPS P.C.B. and Voltage Selector P.C.B.--------------------------------------------33

10 Block Diagram ---------------------------------------------------35

10.1. System Control -------------------------------------------35

10.2. Audio --------------------------------------------------------38

10.3. Power Supply ---------------------------------------------40

11 Wiring Connection Diagram---------------------------------42 12 Schematic Diagram---------------------------------------------43

12.1. Schematic Diagram Notes -----------------------------43

12.2. Main (CD Motor Driver) Circuit----------------------- -45

12.3. Main (USB EMMC) Circuit -----------------------------46

12.4. Main (SOC I/O Expander) Circuit --------------------47

12.5. Main (Damp) Circuit -------------------------------------49

12.6. Main (Connector) Circuit -------------------------------51

12.7. Main (DSP) Circuit---------------------------------------52

12.8. Main (Tuner AUX) Circuit ------------------------------53

12.9. Main (VREG Fan) Circuit-------------------------------54

12.10. Panel Circuit-----------------------------------------------57

12.11. USB, Music Port & CD Interface Circuit------------58

13 Printed Circuit Board ------------------------------------------59

13.1. Main P.C.B. (Side A)-------------------------------------59

13.2. Main P.C.B. (Side B)-------------------------------------60

13.3. Panel, USB & Music Port P.C.B. ---------------------61

13.4. CD Interface P.C.B.--------------------------------------62

14 Vo ltage and Waveform Measurement --------------------63

14.1. Voltage Measurement-----------------------------------63

14.2. Waveform Chart ------------------------------------------68

15 Exploded View and Replacement Parts List-----------69

15.1. Cabinet Parts Location 1 -------------------------------69

15.2. Cabinet Parts Location 2 -------------------------------70

15.3. Packaging (SC-AKX58GN/PH/PN-K) ---------------71

15.4. Packaging (SC-AKX78PH/PN-K) --------------------72

15.5. Mechanical Replacement Part List ------------------73

15.6. Electrical Replacement Parts List--------------------75

1 Safety Precautions

1.1. General Guidelines

1. IMPORTANT SAFETY NOTICE There are special components used in this equipment which a re 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. Wh en 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 o hmmeter, 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 1-1.

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. Th e 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

1.2. Before Use (For PH only)

Be sure to disconnect the mains cord before adjusting the voltage selector as shown in Figure 1-2. 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. 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.)

Figure 1-2

1.3. Before Repair and Adjustment

Disconnect AC power to discharge AC capacitor as indicate below diagram through a 10 Ω, 10 W resistor to ground.

Figure 1-3

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 / 220~240 V, 50/60 Hz during Power ON, in FM mode at volume minimal shoul d be ~ 750 mA (PH). Current consumption at AC 120 V, 60 Hz during Power ON, in FM mode at volume minimal should be ~ 750 mA (PN). Current consumption at AC 220~240 V, 50 Hz during Power ON, in FM mode at volume minimal should be ~ 750 mA (GN).

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. Power Supply using SMPS

This model uses Switching Mode Power Supply (SMPS) to provide the power supply to the unit. Here is the supplied part no. for the SMPS Module

1) N0AB2GP00001 (For PN)

2) N0AD2GP00001 (For PH)

3) N0AC2GP00001 (For GN)

1.5.1. For PN

Figure 1-4

1.5.2. For PH

1.5.3. For GN

Figure 1-5

Figure 1-6

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

13 RGR0443E-D1A REAR PANEL AKX78PN

13 RGR0443R-AA REAR PANEL AKX58PH

13 RGR0443S-AA REAR PANEL AKX78PH

13 RGR0443U-A1A REAR PANEL AKX58PN

13 RGR0443U-BA REAR PANEL AKX58GN

25 RKM0713-K1 TOP CABINET

301 RAE1044Z-V TRAVERSE UNIT

A2 K2CB2CB00022 AC CORD AKX58PN,

A2 K2CJ2YY00093 AC CORD AKX58GN

A2 K2CQ2YY00119 AC CORD AKX58PH,

A3 RQT9895-2M O/I BOOK (En/Sp) AKX58PH/PN,

A3 RQT9898-L O/I BOOK (En) AKX58GN

A3 RQT9958-1B O/I BOOK (En) AKX58PH/PN,

PCB7 N0AB2GP00001 SMPS MODULE AKX58PN,

PCB7 N0AC2GP00001 SMPS MODULE AKX58GN

PCB7 N0AD2GP00001 SMPS MODULE AKX58PH,

AKX78PN

AKX78PH

AKX78PH/PN

AKX78PN

AKX78PH

2Warning

2.1. Prevention of Electrostatic Discharge (ESD) to Electrostatically Sensitive (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 damag e 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, p lace the assembly on a cond ucti ve surface su ch as a luminum 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) 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 pick up : 10 0 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. General description about Lead Free Solder (PbF)

The lead free solder has been used in the mounting proce ss of a ll electrical components on the printed circuit board s 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 ma inly 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 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 th e 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 con trol after setting the temperatu re 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 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 FFC is connected to the new optical pickup unit. After replacing the optical pickup unit and connecting the flexi-

ble cable, cut off the antistatic FFC.

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

3.1.1. Firmware Update Procedur e

4 Specifications

Q Amplifier section RMS output power stereo mode

Front Ch (high) 270 W per channel (3 Ω),

1 kHz, 30% THD (SA-AKX78)

300 W per channel (3 Ω),

1 kHz, 30% THD (SA-AKX58)

Front Ch (low) 420 W per channel (2 Ω),

100 Hz, 30% THD (SA-AKX78)

450 W per channel (2 Ω),

100 Hz, 30% THD (SA-AKX58)

Subwoofer channel 420 W per channel (2 Ω),

100 Hz, 30% THD (SA-AKX78)

Total RMS stereo mode power

1800 W (30% THD) (SA-AKX78) 1500 W (30% THD) (SA-AKX58)

Bit rate 128 kbps Write Speed Memory 1x, 3x max. (CD only) Recording File Format MP3 (*. Mp3)

Q Bluetooth section Version

Output Class 2 Supported profile A2DP, AVRCP, SPP Operating frequency FH-SS 2.4 GHz band Operating distance 10 m line of sight

Q General Power supply

AC 110 to 127 V/220 V to 240 V, 50/60 Hz (for PH)

Power consumption 138 W (SA-AKX78)

Bluetooth

AC 120 V, 60 Hz (for PN)

Ver.2.1 + EDR

115 W (SA-AKX58)

Q Tuner, terminals section Preset memory FM 30 stations AM 15 stations

Frequency modulation (FM)

Frequency range 87.50 MHz to 108.00 MHz

(50 kHz step) (for PH)

87.5 MHz to 108.0 MHz (100 kHz step) (for PN)

87.9 MHz to 107.9 MHz (200 kHz step) (for PN)

Antenna terminals 75 Ω (unbalanced)

Amplitude modulation (AM)

Frequency range 522 kHz to 1629 kHz

(9 kHz step) (for PH)

520 kHz to 1630 kHz

(10 kHz step) (for PH)

520 kHz to 1710 kHz

(10 kHz step) (for PN)

Aux Input (1) Pin jack (1 system) Aux Input (2)

Sensitivity 100 mV, 4.7 k Ω

Q Disc section Discs played (8 cm or 12 cm) CD, CD-R/RW(CD-DA, MP3*)

Pick up

Wavelength 790 nm(CD)

* MPEG-1 Layer 3

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.)

Dimensions (W x H x D) 230 mm x 335 mm x 252 mm

Mass 3.7 kg (SA-AKX78)

3.5 kg (SA-AKX58)

Operating temperature range 0 °C to +40 °C

Operating humidity range 35% to 80% RH

Power Consumption in standby mode

Power Consumption in standby mode (With "STANDBY BLUETOOTH" set to "ON")

1. Specifications are subject to change without notice. Mass and dimension are appropriate

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

Q System: SC-AKX58PN-K

Q System: SC-AKX58PH-K

Q System: SC-AKX58GN-K

Q System: SC-AKX78PN-K

0.4 W (approximate) (for PH)

0.3 W (approximate) (for PN)

Main Unit: SA-AKX58PN-K

Front Speakers: SB-AKX78PN-K

Main Unit: SA-AKX58PH-K

Front Speakers: SB-AKX78PN-K

Main Unit: SA-AKX58GN-K

Front Speakers: SB-AKX78PN-K

Main Unit: SA-AKX78PN-K

Front Speakers: SB-AKX78PN-K

Subwoofer: SB-AKW78PN-K

(no condensation)

0.6 W (approximate)

USB recording

Bit rate 128 kbps USB recording speed 1x, 3x max. (CD only) Recording file format MP3 (*.mp3)

Q Internal Memory section Memory

Memory Size 2 GB File format support media MP3 (*.mp3)

Recording internal memory

Q System: SC-AKX78PH-K

Main Unit: SA-AKX78PH-K

Front Speakers: SB-AKX78PN-K

Subwoofer: SB-AKW78PN-K

5 Location of Controls and Components

5.1. Remote Control Key Button Operation

5.2. Main Unit Key Button Operation

6 Service Mode

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. Sales Demonstration Lock Function

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

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

Note: [

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

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

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

6.3. Service Mode Table

6.4. Doctor Mode Table

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) (For AKX58)

(Display 2)

Checksum (Hex)

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 the remote control.

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

(Decimal)1 2 3 4

(Display 1) (For AKX78)

(Decimal)

1 2 3 4

6.4.1. Doctor Mode Table 1

6.4.2. 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.

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.

6.4.3. Doctor Mode Table 3

Self- Adjustment

Test

CD LSI Version Check

Item

DescriptionMode Name

To display result of self-adjustment for CD operation.

To check the CD LSI Version and its checksum.

FL Display

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).

(Display 1)

Key Operation

Front Key

In Doctor Mode

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

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

In Doctor Mode:

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

Bluetooth

Version Check

Bluetooth module will need some time to power up and read the version display. Meanwhile [_BT_ll----_] will show before the ver. numbers appear. 2s display count should start after flash version number appear.

ROM

Version (Decimal)

Type

Year Develop

(Display 2)

Checksum (Hex)

v = flash version (0~7), w = flash sub version (0~F), x = control version (0~F), yyy = EEPROM version (0~255), zz = EEPROM sub version (0~99),

after 2 sec

( 2 sec)

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

1. Go to Bluetooth selector and enter Doctor Mode.

2. Press [10] [2] [4] and display will show.

Bluetooth Check 1. Bluetooth device will start

pairing.

2. Once connected it wll autoplay for 5 sec and auto disconect.

1. Go to Bluetooth selector and enter Doctor Mode.

2. Press USB[O/II] on remote control.

3. Device will display SC-MAX250-X, SC-MAX150-X. (X = region number)

6.5. Self-Diagnostic Mode

FL Display

Key Operation

Front Key

Item

DescriptionMode Name

Self Diagnostic Mode

To enter into self diagnostic checking Step 1: Select CD mode

(Ensure no disc is inserted).

To exit, press [

] on main unit or

remote control.

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

Error Code Information

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

Example: Step 1: In self diagnostic mode,

Press [g] on main unit.

To exit, press [8] on main unit or remote control.

Delete error code To clear the stored in memory

(EEPROM IC)

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

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.

F26 Communication betw een

CD servo LSI and micro-p abnormal.

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

6.6. Self-Diagnostic Error Code Table

Self-Diagnostic Function provides information on any problems occurring for the un it 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.

6.6.1. Power Supply Error Code Table

6.6.2. CD Mechanism Error Code Table

6.6.3. Bluetooth Error Code Table

of error Automatic FL Display Remarks

F70

Bluetooth Communication

Communication between Bluetooth module and micro-p abnormal

Press [

] on main unit for

next error.

F77

Bluetooth Address Error

If there is no valid Bluetooth address stored in the EEPROM IC

Press [

] on main unit for

next error.

Error Code Diagnostic Contents Description of error

7 Troubleshooting Guide

“Contents for this section is not available at time of issue”

8 Disassembly and Assembly Instructions

• Illustration is based on SA-AKX78PH-K.

• 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 this 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.

• Be sure to use proper service tools, equipments or jigs during repair.

• 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. and Music Port P.C.B.

• Disassembly of Bluetooth P.C.B.

• Disassembly of USB P.C.B.

• 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.

8.1. Type of Screws

8.2. Disassembly Flow Chart

Front Panel Unit

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

Bluetooth P.C.B.

USB P.C.B.

Top Cabinet

Main P.C.B. Rear Panel

CD Mechanism Unit

CD Interface P.C.B.

SMPS P.C.B. and Voltage Selector P.C.B.

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

8.4. Disassembly of Top Cabinet

Step 1 Remove 4 screws. Step 2 Remove 5 screws. Step 3 Release both sides of Top Cabinet outwards as arrow

shown.

8.5. Disassembly of Front Panel Unit

• Refer to “Disassembly of Top Cabinet”.

Step 1 Detach 30P FFC at the connector (CN2506) on Main

P.C.B.. Step 2 Detach 8P Cable at the connector (CN2511) on Main P.C.B.. Step 3 Detach 4P Cable at the connector (CN2510) on Main P.C.B..

Step 4 Release tabs on both side of Front Panel Unit.

Step 4 Slightly lift up to remove Top Cabinet.

Step 5 Release tabs at bottom of unit. Step 6 Detach to remove Front Panel Unit

8.6. Disassembly of Panel P.C.B. and Music Port P.C.B.

• Refer to “Disassembly of Top Cabi net”.

• Refer to “Disassembly of Front Panel Unit”.

Step 1 Remove Volume Knob. Step 2 Remove Control Knob.

Step 3 Remove 7 screws. Step 4 Release catches.

+ 60 hidden pages