Panasonic SAAKX-10 Service manual

PSG1002034CE

CD Stereo System

Model No. SA-AKX10PH

SA-AKX10PN

Product Color: (K)...Black Type

Notes: This model’s CD Mechanism Unit is DLS6C. Please refer to the original service manual (Order No. MD0803034CE) for this mechanism

TABLE OF CONTENTS

PAGE PAGE

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 --------------------------------- 4

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

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 (DLS6C)) ---------------------------------------------------19

6.4. Self-Diagnostic Mode -----------------------------------20

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

7 Troubleshooting Guide----------------------------------------22

7.1. Troubleshooting Guide for F61 and/or F76--------22

7.2. Part Location ----------------------------------------------23

7.3. D-Amp IC Operation & Contro l -----------------------26

8 Service Fixture & Tools---------------------------------------28

8.1. Service Tools and Equipment-------------------------28

9 Disassembly and Assembly Instructions---------------29

9.1. Disassembly Flow Chart--------------------------------30

9.2. Main Components and P.C.B. Locations-----------31

9.3. Disassembly of Top Cabinet---------------------------32

9.4. Disassembly of Tuner P.C.B.--------------------------33

9.5. Disassembly of Front Panel Assembly -------------33

9.6. Disassembly of Panel P.C.B.--------------------------35

9.7. Disassembly of Remote Sensor P.C.B.-------------36

9.8. Disassembly of CD Open Button P.C.B.------------37

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

9.10. Disassembly of CD Lid---------------- ------------------ 38

9.11. Disassembly of Main P.C.B. ---------------------------39

9.12. Replacement of Regulator IC (IC2701)-------------40

9.13. Disassembly of D-Amp P.C.B.------------------------41

9.14. Replacement of Audio Digital Amp IC (IC5900) ----------------------------------------------------43

9.15. Disassembly of SMPS P.C.B.-------------------------44

9.16. Replacement of Switching Regulator IC (IC5701) ----------------------------------------------------46

9.17. Replacement of Rectifier Diode (D5702)-----------47

9.18. Replacement of Regulator Diode (D5801)---------49

9.19. Replacement of Regulator Diode (D5802)---------50

9.20. Replacement of Regulator Diode (D5803)---------51

9.21. Disassembly of CD Mechanism Unit (DLS6C) ---52

9.22. Disassembly of Rear Panel----------------------------54

9.23. Disassembly of Voltage Selector P.C.B. (For PH only) ----------------------------------------------------55

9.24. Disassembly of CD Servo P.C.B.---------------------56

10 Replacement of Traverse Unit------------------------------58

10.1. Disassembling Procedures----------------------------58

10.2. Assembling Procedure----------------------------------59

11 Service Position -------------------------------------------------61

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

11.2. Checking and Repairing of D-Amp P.C.B. ---------61

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

11.4. Checking and Repairing of USB P.C.B. ------------62

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

12 Voltage & Waveform Chart-----------------------------------64

12.1. CD SERVO P.C.B. ---------------------------------------64

12.2. Main P.C.B. (1/2)-----------------------------------------65

12.3. Main P.C.B. (2/2)-----------------------------------------66

12.4. Panel P.C.B.-----------------------------------------------66

12.5. USB P.C.B.------------------------------------------------- 67

12.6. D-Amp P.C.B. ---------------------------------------------67

12.7. SMPS P.C.B.----------------------------------------------68

12.8. Tuner P.C.B. -----------------------------------------------68

12.9. Waveform Table ------------------------------------------69

13 Illustration of ICs, Transistor and Diode ----------------70

14 Simplified Block Diagram------------------------------------ 71

14.1. Overall Simplified Block Diagram-------------------- 71

14.2. D-Amp Block Diagram---------------------------------- 72

15 Block Diagram--------------------------------------------------- 73

15.1. Servo/System Control ---------------------------------- 73

15.2. Audio-------------------------------------------------------- 74

15.3. Power Amplifier ------------------------------------------ 75

15.4. Power Supply--------------------------------------------- 76

16 Wiring Diagram-------------------------------------------------- 77 17 Schematic Diagram Notes----------------------------------- 79 18 Schematic Diagram-------------------------------------------- 81

18.1. CD Servo Circuit ----------------------------------------- 81

18.2. Main Circuit------------------------------------------------ 82

18.3. Panel Circuit ---------------------------------------------- 86

18.4. CD Open Button, Remote Sensor & Tuner Circuit------------------------------------------------------- 87

18.5. USB Circuit------------------------------------------------ 88

18.6. D-Amp Circuit--------------------------------------------- 89

18.7. SMPS Circuit---------------------------------------------- 90

18.8. Voltage Selector Circuit (For PH Only)------------- 92

19 Printed Circuit Board------------------------------------------ 93

19.1. CD Servo, Tuner & Voltage Selector P.C.B. ------ 93

19.2. Main P.C.B.------------------------------------------------ 94

19.3. Panel P.C.B.----------------------------------------------- 95

19.4. CD Open Button, Remote Sensor, USB & DAmp P.C.B.------------------------------------------------ 96

19.5. SMPS P.C.B. (For PH only) --------------------------- 97

19.6. SMPS P.C.B. (For PN only) --------------------------- 98

20 Terminal Function of ICs------------------------------------- 99

20.1. IC2801 (RFKWMAKX10PN): IC MICROPROCESSOR -------------------------------------------- 99

20.2. IC6901(C0HBB0000057): IC FL Driver------------ 99

21 Exploded View and Replacement Parts List----------101

21.1. Exploded View and Mechanical replacement Part List ---------------------------------------------------101

21.2. Electrical Replacement Part List--------------------107

1 Safety Precautions

1.1. General Guidelines

1. 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.

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 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.

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

1.2. 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 setti ng 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 (C5701, C5703, C5704, C5705, C5706, C5707, C570 8) 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 120 V, 60 Hz in NO SIGNAL mode volume mi nimal should be ~ 500 mA. (PN)

Current consumption at AC 110~127 V / 220~240 V, 50/60 Hz in NO SIGNAL mode volume minimal should be ~ 500 mA. (PH)

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 & 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

6 REXX1030 1P RED WIRE (VOLTAGE-SMPS) PH

7 REXX1031 1P BLACK WIRE (VOLTAGE-SMPS) PH

13 RGRX1002A-A2 REAR PANEL PN

13 RGRX1002B-A2 REAR PANEL PH

37 RKMX1003-K TOP CABINET

401 RAEX0190Z-V TRAVERSE UNIT

A2 K2CB2CB00021 AC CORD PN

A2 K2CQ2CA00007 AC CORD PH

A3 RQTX1084-M O/I BOOK (En,SP)

A3 RQTX1085-M O/I BOOK (Sp) PH

A6 K2DAYYY00002 AC PLUG ADAPTER PH

PCB3 REPX0809A SMPS P.C.B. (RTL) PN

PCB3 REPX0809C SMPS P.C.B. (RTL) PH

PCB10 REPX0809C VOLTAGE SELECTOR P.C.B. (RTL) PH

DZ5701 ERZV10V511CS ZNR

S5701 K0ABCA000007 SW VOLTAGE SELECTOR PH

L5703 G0B612H00002 LINE FILTER

T5701 ETS39AG4M6AD MAIN TRANSFORMER PH

T5701 ETS39AG4NGAD MAIN TRANSFORMER PN

T5751 ETS19AB2E6AG SUB TRANSFORMER

T6101 G4DYA0000214 SWITCHING TRANSFORMER

PC5701 B3PBA0000402 PHOTO COUPLER

PC5702 B3PBA0000402 PHOTO COUPLER

PC5720 B3PBA0000402 PHOTO COUPLER

PC5799 B3PBA0000402 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

C5701 F0CAF334A105 0.33uF

C5703 F0CAF104A105 0.1uF PH

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

C5703 F0CAF224A105 0.22uF PN

C5704 F1BAF1020020 1000pF

C5705 F1BAF1020020 1000pF

C5706 F1BAF1020020 1000pF PH

C5707 F1BAF1020020 1000pF PH

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, 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) 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: 785 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 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) 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 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.

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 (DLS6C):

1) This model uses CD Mechanism Unit (DLS6C).

2) This service manual does not contain the following information on CD Mechanism Unit (DLS6C)

- Schematic Diagram, Block Diagram and P.C.B. layout of CD Mechanism Unit (DLS6C) P.C.B.

- Parts List for individual parts of CD Mechanism Unit (DLS6C).

- Exploded View and Part List for individual parts of CD Mechanism Unit (DLS6C). Please refer to original service manual (Order No. MD0803034CE)

• Micro-processor:

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

- Micro-processor IC, IC2801 (RFKWMAKX10PN)

• Speaker system:

1) This model uses speaker, SB-AKX10PN-K (PSG1001001CE)

4 Specifications

Q AMPLIFIER SECTION RMS output power stereo mode

Front Ch (both channels driven)

125 W per channel (4 Ω), 1 kHz, 10% THD

Total RMS stereo mode power

250 W

PMPO output power (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 785 nm(CD) Laser Power CLASS 1 (CD)

Audio output (Disc)

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

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)

Q GENERAL

Power supply

For PH only

AC 110 to 127 V, 50 Hz AC 220 to 240 V, 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) 250 mm x 336 mm x 245 mm Mass 3 kg Operating temperature range 0 °C to +40 °C Operating humidity range 35% to 80% RH

(no condensation)

Power Consumption in st andby mode

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

Notes

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-AKX10PN-K

Main Unit: SA-AKX10PN-K

Front Speakers: SB-AKX10PN-K

Q System: SC-AKX10PH-K

Main Unit: SA-AKX10PH-K

Front Speakers: SB-AKX10PN-K

5 Location of Controls and Components

5.1. Main Unit Key Button Operation

POWER

 VOLUME +

MANUAL EQ

ALBUM

AUX

USB

Display Panel

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.

Volume Control

TRACK

OPEN CLOSE

FM/AM

[ / ][ / ] Track skip or search, fast-forward or rewind, tune or preset channel selection, sound quality adjustment, manual EQ setting (BASS & TREBLE)

Album selection

[ ] Stop function

[AUX]

D.BASS Selection

[USB, / ]

USB play or pause

USB port Remote control signal sensor [MANUAL EQ] selection

[ CD, / ]

Disc play and pause

[Track]

Skip and play your desired track

Tuner (FM/AM) Selection

[ , OPEN/CLOSE]

Disc tray open or close

Disc tray

5.2. Remote Control Key Button Operation

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

FL Display

DescriptionMode Name

To enter into Doctor Mode In CD Mode:

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

Firmware

Version EEPROM Checksum (if applicable)

Condition 1

When EEPROM is detected and has ROM correction. (The correction point existing data is other than 0 )

Key Operation

Front Key

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

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

In CD Mode:

1. Enter Doctor Mode

Condition 2

When EEPROM is detected and there is no ROM correction. (The correction point is 0 )

Condition 3

When the EEPROM is detected and has ROM correction but NG. (The file name is different even though a EPROM is set,or no correction file is existing)

6.2.2. Doctor Mode Table 2

Cold Start

Volume Setting Check

FL Display Check

DLS6 Reliability Test (Loading)

Item

DescriptionMode Name

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

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 Unit (DLS6C) Open/Close operation.

In this mode, the tray will open & close.

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

FL Display

Press [7]: VOLUME50 Press [8]: VOLUME35 Press [9]: VOLUME27 Press [>10]: VOLUME0

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

Cancellation Display

Key Operation

Front Key

In Doctor Mode:

1. Press [4] button on remote control.

In Doctor Mode:

1. Press [7],[8],[9],[>10] button on remote control.

Volume

In Doctor mode:

1. Press [2] button on remote control.

In Doctor Mode:

1.Press [5] button on remote control.

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

DLS6 Reliability Test (Traverse)

DLS6 Reliability Test (Combination)

To determine CD Mechanism DLS6C 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.

To determine CD Mechanism Unit (DLS6C) Open/Close & Access Inner & Outer Disc Operation.

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

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

In Doctor Mode:

1.Press [6] 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 [DIMMER] 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.

6.3. Reliability Test Mode (CD Mechanism Unit (DLS6C))

First Track

Access

First Track

Play 5 s

Last Track

Access

Last Track

Play 5 s

Count up

Below is the process flow chart of the aging test for the CD Mechanism Unit (DLS6C).

OPEN Operation

OPEN wait fot 1 s

CLOSE Operation

CLOSE wait for 5s

Fig. 1. Reliability Test (Loading)

Count up

Fig. 2. Reliability Test (Traverse)

First Track

Access

First Track

Play 5 s

Last Track

Access

Last Track

Play 5 s

Open

Operation

Open wait

for 1 s

Operation

Fig. 3. Reliability Test (Combination)

Count up

6.4. Self-Diagnostic Mode

Mode Name

Mode

Service Mode

Item

Description

To enter into self-diagnostic.Self-Diagnostic

To unlock the mechanism unit for service.

During the process,’’SRCV TRV’’ will blink.

When ready "SRVC TRV" will stop blinking.

In this mode, the disassembly of DLS6C can be carry out. (Refer to original service manual for CD Mechanism Unit (DLS6C))

(Display 1)

(Blinking)

(Display 2)

FL Display

Key Operation

Front Key

In AUX Mode:

1. Press and hold [STOP] button on the main unit for 2 secs.

2. Do not release [STOP]    button, press & hold [ / ] on  the main unit for 2 secs.

3. To exit, press [POWER, ] button on main unit.

In Self-Diagnostic Mode:

1. Press [ Open / Close] button on main unit.

2.To exit,press [POWER ] button on main unit.

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

Error Code Diagnosis Contents Description of error Automatic FL Display Remarks

F61 Power Amp IC output

abnormal

F76 DCDET1 = L (NG)

Upon power on, PCNT=HIGH, DCDET2=L after checking LSI.

Press [ ] on main unit for next error.

-DEMO

F61-76 Both DCDET1 and

DCDET2 L(NG)

6.5.2. Mechanism Error Code Table (CD Mechanism Unit (DLS6C))

Error Code Diagnosis Contents Description of error Automatic FL Display Remarks

F15 CD REST SW Abnormal

F26 Communication between

CD servo LSI and micro-p abnormal.

CD traverse position initial setting operation fail safe

time is over (10 sec) waiting for REST SW to turn on.

At the time of switching to CD function,SENSE = H shall be detected using DTMS system setting command. If the error is memorized when SENSE = L is not detected within fail safe timer time (20ms), [F26] shall be displayed simultaneously.This display shall be retained if the power is ON and at CD function. If this error occurs, CD operation afterwards shall not be executed as in the case of [NO DISC].

Press [ ] on main unit for next error.

H15 CD Open SW Abnormal During normal operation

H16

CD closing SW abnormal

CD OPEN SW On fail to be detected with 3 sec.

During Closing operation,if "POS_SW_CEN" is not detected within 3 secs.

Press [ ] on main unit for next error.

Press [ /-DEMO]on main unit for next error.

7 Troubleshooting Guide

7.1. Troubleshooting Guide for F61 and/or F76

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

Symptom Remarks

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

2 AC Inlet, P5701 2 P5701 solder crack, dry joint. 3 Fuse, F1 3 Fuse, F1 Open. 4 Photocoupler 4 PC5702/PC5799 solder crack.

PC5702, PC5799 Dry joint, short circuit, open circuit. 5 Switching IC, IC5701 5 IC5701 Faulty. 6 Switching IC, IC5799 6 IC5799 Faulty.

Set can ON 1 Speaker Output 1 Faulty speaker unit, Loose connection, Short. Refer to then F61

2 D-AMP circuit 2a D-AMP IC, IC5900 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 Check cable wire connection between cable wire ZJ2701

(At Main P.C.B) & connector CN5802 (At SMPS P.C.B) Voltage Regulator IC (IC2701) &

Switching Regulator IC (IC2702) faulty.

3 Photocoupler 3 PC5720 solder crack,

PC5720 Dry joint, short circuit, open circuit.

Set can ON 1 Rectifier D5801 1a Improper contact between D5801 to Heatsink. working normally Rectifier D5802 Improper contact between D5802 to Heatsink. for some time 2 Thermistor TH5860 1b Set trigger temperature protection. then F76

Possible Fault(s)Checking Items

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

Section 7.2.3 Fig. 3. D-Amp P.C.B.

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.

7.2. Part Location

7.2.1. SMPS P.C.B.

AC Inlet: P5701

Fuse: F1

Switching IC: IC5799

Switching IC: IC5701

Transformer: T5701

Thermistor: TH5860

Photocoupler: PC5720

Fig. 1 SMPS P.C.B.

Photocoupler: PC5702, PC5799

Rectifier: D5801, D5802

Connector: CN5802

7.2.2. Main P.C.B.

Cable wire: ZJ2701

Switching Regulator IC: IC2702

Voltage Regulator IC: IC2701

Fig. 2 Main P.C.B.

7.2.3. D-Amp P.C.B.

D-Amp IC: IC5900

Fig. 3 D-Amp P.C.B.

7.3. D-Amp IC Operation & Control

D-AMP IC Operation & Control

1) D-AMP IC (C1AB0000497) was used for this model (AKX10).

2) Three control pins (signal send from micro-processor IC) were used to control the D-AMP IC operation such as muting, standby and normal operation. They are described as below: -

No Pin no Signal name Function

1 4 F_HOP Frequency Hop control. 2 6 MODE_DA Digital Amp On/Off control. 3 3 MUTE_F Digital Amp Muting control

Table 1: Digital AMP Pin Control.

Here is detailed description of the three control pins for the D-AMP IC

A) MODE_DA & MUTE_F were used to switch the D-AMP IC in the following muting status:

x L(Low/OFF): Standby / OFF x H (High/ON): Operating or Mute

Below is the logic for the two pins used for the control of the D-AMP IC.

No MODE_DA MUTE_F Digital AMP IC mode status 1 L X OFF (0V) 2 H H Mute (2.5V) 3 H L Operating(5V)

Table 2: Digital AMP IC Mode Status.

Note: Standby/OFF condition of D.AMP IC is avai lable / activated only during the following event: Switching of Frequency Hoping, power off and start up (when the unit is undergoing the transition from standby to normal operation mode)

B) F_HOP is used to control the D-AMP operation to avoid interference with AM source by controlling the frequency source used. It will switch from one frequency to the other, depend i ng on the tuned AM frequency.

For 9 KHz Step

AM Band Frequency F_HOP Switching Frequency

522 ~ 558 L 301 567 ~ 639 H 350 648 ~ 855 L 301 864 ~ 945 H 350

954 ~ 1152 L 301 1161 ~ 1242 H 350 1251 ~ 1449 L 301 1458 ~ 1539 H 350 1548 ~ 1629 L 301

Table 3: F_HOP Control during 9 kHz Step

For 10 KHz Step

AM Band Frequency F_HOP Switching Frequency

520 ~ 560 L 301

570 ~640 H 350 650 ~ 860 L 301 870 ~ 950 H 350

960 ~ 1160 L 301

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 Service Fixture & Tools

8.1. Service Tools and Equipment

Prepare service tools before process service position.

Service Tools Remarks

Main P.C.B. (CN2701) - SMPS P.C.B. (CN5802) REXX0189 (11P Cable Wire)

9 Disassembly and Assembly Instructions

Caution Note:

• This section describes the disassembly and/or assembly procedures for all major printed circuit boards & main components for the unit. (You ma y 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 o r 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 Assembly

• Disassembly of Panel P.C.B.

• Disassembly of Remote Sensor P.C.B.

• Disassembly of CD Open Button P.C.B.

• Disassembly of USB P.C.B.

• Disassembly of CD Lid

• Disassembly of Main P.C.B.

• Disassembly of Regulator IC (IC2701)

• Disassembly of D-Amp P.C.B.

• Disassembly of Audio Digital Amp IC (IC5900)

• Disassembly of SMPS P.C.B.

• Disassembly of Switching Regulator IC (IC5701)

• Disassembly of Regulator Diode (D5702)

• Disassembly of Regulator Diode (D5801)

• Disassembly of Regulator Diode (D5802)

• Disassembly of Regulator Diode (D5803)

• Disassembly of CD Mechanism Unit (DLS6C)

• Disassembly of CD Servo P.C.B.

• Disassembly of Rear Panel

• Disassembly of Voltage Selector P.C.B. (For PH only)

9.1. Disassembly Flow Chart

9.3. Top Cabinet

9.4. Tuner P.C.B.

9.5. Front Panel Assembly

9.6. Panel P.C.B.

9.7. Remote Sensor

P.C.B.

9.8. CD Open

Button P.C.B.

9.9. USB P.C.B.

9.10. CD Lid

9.11. Main P.C.B.

9.12. Regulator IC (IC2701)

9.13. D-Amp P.C.B.

9.14. Audio Digital Amp IC (IC5900)

9.15. SMPS P.C.B.

9.16. Switching Regulator IC (IC5701)

9.17. Rectifier Diode (D5702)

9.18. Regulator Diode

(D5801)

9.19. Regulator Diode

(D5802)

9.20. Regulator Diode

(D5803)

9.21. CD Mechanism Unit

(DLS6C)

9.22. CD Servo P.C.B.

9.23. Rear Panel

9.24. Voltage Selector

P.C.B. (For PH only)

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