Panasonic SA-AKX10PH User manual

© Panasonic Corporation 2010. All rights reserved.
Unauthorized copying and distribution is a violation
of law.
PSG1002034CE
CD Stereo System
Model No. SA-AKX10PH
SA-AKX10PN
Product Color: (K)...Black Type
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 Service 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
Notes: This model’s CD Mechanism Unit is DLS6C. Please refer to the original service manual
(Order No. MD0803034CE) for this mechanism

2
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 & Control -----------------------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 & D-
Amp 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 MICRO-
PROCESSOR -------------------------------------------- 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

3
1 Safety Precautions
1.1. General Guidelines
1. When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or
damaged by the short circuit.
2. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly
installed.
3. After servicing, carry out the following leakage current checks to prevent the customer from being exposed to shock hazards.
1.1.1. LEAKAGE CURRENT COLD CHECK
1. Unplug the AC cord and connect a jumper between the two prongs on the plug.
2. Measure the resistance value, with an ohmmeter, between the jumpered AC plug and each exposed metallic cabinet part on
the equipment such as screwheads, connectors, control shafts, etc. When the exposed metallic part has a return path to the
chassis, the reading should be between 1MΩand 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. The potential at any point should not exceed 0.75 volts RMS. A leakage current tester (Simpson Model 229 or equivalent)
may be used to make the hot checks, leakage current must not exceed 1/2 milliamp. In case a measurement is outside of the
limits specified, there is a possibility of a shock hazard, and the equipment should be repaired and rechecked before it is
returned to the customer.
Figure 1
1.2. 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

4
1.4. Before Repair and Adjustment
Disconnect AC power to discharge unit AC Capacitors as such (C5701, C5703, C5704, C5705, C5706, C5707, C5708) through a
10 Ω, 10 W resistor to ground.
Caution:
DO NOT SHORT-CIRCUIT DIRECTLY (with a screwdriver blade, for instance), as this may destroy solid state devices.
After repairs are completed, restore power gradually using a variac, to avoid overcurrent.
Current consumption at AC 120 V, 60 Hz in NO SIGNAL mode volume minimal 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

5
C5703 F0CAF224A105 0.22uF PN
C5704 F1BAF1020020 1000pF
C5705 F1BAF1020020 1000pF
C5706 F1BAF1020020 1000pF PH
C5707 F1BAF1020020 1000pF PH
C5708 F1BAF1020020 1000pF
Safety Ref. No. Part No. Part Name & Description Remarks

6
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 Elec-
trostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and
semiconductor "chip" components. The following techniques should be used to help reduce the incidence of component damage
caused by electrostatic discharge (ESD).
1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any ESD on your
body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging ESD wrist strap,
which should be removed for potential shock reasons prior to applying power to the unit under test.
2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as alumi-
num 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 compara-
ble conductive material).
7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material
to the chassis or circuit assembly into which the device will be installed.
Caution:
Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the
brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD) suf-
ficient to damage an ES device).

7
2.2. Precaution of Laser Diode
Caution:
This product utilizes a laser diode with the unit turned “on”, invisible laser radiation is emitted from the pickup lens.
Wavelength: 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.

8
2.3. Service caution based on Legal restrictions
2.3.1. General description about Lead Free Solder (PbF)
The lead free solder has been used in the mounting process of all electrical components on the printed circuit boards used for this
equipment in considering the globally environmental conservation.
The normal solder is the alloy of tin (Sn) and lead (Pb). On the other hand, the lead free solder is the alloy mainly consists of tin
(Sn), silver (Ag) and Copper (Cu), and the melting point of the lead free solder is higher approx.30 degrees C (86°F) more than that
of the normal solder.
Definition of PCB Lead Free Solder being used
Service caution for repair work using Lead Free Solder (PbF)
• The lead free solder has to be used when repairing the equipment for which the lead free solder is used.
(Definition: The letter of “PbF” is printed on the PCB using the lead free solder.)
• To put lead free solder, it should be well molten and mixed with the original lead free solder.
• Remove the remaining lead free solder on the PCB cleanly for soldering of the new IC.
• Since the melting point of the lead free solder is higher than that of the normal lead solder, it takes the longer time to melt the
lead free solder.
• Use the soldering iron (more than 70W) equipped with the temperature control after setting the temperature at 350±30 degrees
C (662±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%
The letter of “PbF” is printed either foil side or components side on the PCB using the lead free solder.
(See right figure)

9
2.4. Handling Precautions for Traverse Unit
The laser diode in the optical pickup unit may break down due to static electricity of clothes or human body. Special care must be
taken avoid caution to electrostatic breakdown when servicing and handling the laser diode in the traverse unit.
2.4.1. Cautions to Be Taken in Handling the Optical Pickup Unit
The laser diode in the optical pickup unit may be damaged due to electrostatic discharge generating from clothes or human body.
Special care must be taken avoid caution to electrostatic discharge damage when servicing the laser diode.
1. Do not give a considerable shock to the optical pickup unit as it has an extremely high-precise structure.
2. To prevent the laser diode from the electrostatic discharge damage, the flexible cable of the optical pickup unit removed
should be short-circuited with a short pin or a clip.
3. The flexible cable may be cut off if an excessive force is applied to it. Use caution when handling the flexible cable.
4. The antistatic FPC is connected to the new optical pickup unit. After replacing the optical pickup unit and connecting the flexi-
ble 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 electric-
ity 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.

10
2.4.2.2. Human body grounding
1. Use the anti-static wrist strap to discharge the static electricity form your body.

11
3 Service Navigation
3.1. Service Information
This service manual contains technical information which will allow service personnel’s to understand and service this model.
Please place orders using the parts list and not the drawing reference numbers.
If the circuit is changed or modified, this information will be followed by supplement service manual to be filed with original service
manual.
•CD Mechanism unit (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)

12
4 Specifications
QAMPLIFIER 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
QFM/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
QDISC 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
QUSB 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)
QGENERAL
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)
PowerConsumptioninstandby
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.
QSystem: SC-AKX10PN-K Main Unit: SA-AKX10PN-K
Front Speakers: SB-AKX10PN-K
QSystem: SC-AKX10PH-K Main Unit: SA-AKX10PH-K
Front Speakers: SB-AKX10PN-K

13
5 Location of Controls and Components
5.1. Main Unit Key Button Operation
USB
/
AUX
POWER
 VOLUME +
OPEN CLOSE
MANUAL EQ
ALBUM
FM/AM
TRACK CD
/
/
/
17
[MANUAL EQ] selection
Remote control signal sensor
USB play or pause
[USB, / ]
Stop function
[ ]
USB port
D.BASS Selection
[AUX]
Volume Control
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.
Standby/on switch (
/l, POWER)
Display Panel
Disc tray open or close
[ , OPEN/CLOSE]
Tuner (FM/AM) Selection
[Track]
Skip and play your desired track
Disc play and pause
[ CD, / ]
Album selection
Track skip or search,
fast-forward or rewind,
tune or preset channel selection,
sound quality adjustment,
manual EQ setting (BASS & TREBLE)
[ / ][ / ]
Disc tray
17

14
5.2. Remote Control Key Button Operation

15
5.3. Media Information

16
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

17
6.2. Doctor Mode Table
6.2.1. Doctor Mode Table 1
FL Display Key Operation
Front Key
Item
DescriptionMode Name
Doctor Mode
EEPROM
checksum
check
Firmware
Version
EEPROM Checksum
(if applicable)
To enter into Doctor Mode In CD Mode:
1.Press [ ] button on main
unit follow by [4] and [7] on
remote control.
2. To exit, press [OK] button on
remote control or press
[POWER, /I] button on main
unit or remote control.
Condition 1
When EEPROM is detected and has ROM
correction.
(The correction point existing data is other
than 0 )
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)
For checking of various items
and displaying EEPROM and
Firmware version.
In CD Mode:
1. Enter Doctor Mode

18
6.2.2. Doctor Mode Table 2
FL Display Key Operation
Front Key
Item
DescriptionMode Name
Cold Start
Volume Setting
Check
FL Display
Check
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)
In Doctor Mode:
1. Press [4] button on
remote control.
In Doctor Mode:
1. Press [7],[8],[9],[>10]
button on remote control.
In Doctor mode:
1. Press [2] button on
remote control.
Press [7]: VOLUME50
Press [8]: VOLUME35
Press [9]: VOLUME27
Press [>10]: VOLUME0
Volume
In this mode, the tray will open &
close.
Note: Refer to Section 6.3 Fig 1 for
process flow.
The counter will
increment by one.
When reach 9999
will change to 0000
Cancellation Display
DLS6 Reliability
Test (Loading) To determine CD Mechanism Unit (DLS6C) Open/Close operation. In Doctor Mode: 1.Press [5] button on remote
control.
2.To cancel, press [0]
on remote control.
Note: Refer to Section 6.3 Fig 2. for
process flow.
The counter will
increment by one.
When reach 9999
will change to 0000
Cancellation Display
DLS6 Reliability
Test (Traverse) To determine CD Mechanism DLS6C Access Inner & Outer disc operation. In Doctor Mode: 1.Press [6] button on remote
control.
2.To cancel, press [0]
on remote control.
Note: Refer to Fig. 6.3. for process
flow.
The counter will
increment by one.
When reach 9999
will change to 0000
Cancellation Display
DLS6 Reliability
Test
(Combination)
In Doctor Mode:
1.Press [DIMMER] button on
remote control.
2.To cancel, press [0]
on remote control.
In this mode,ensure the CD is in the
main unit.
To determine CD Mechanism Unit
(DLS6C) Open/Close & Access Inner &
Outer Disc Operation.
In this mode,ensure the CD is in the
main unit.

19
6.3. Reliability Test Mode (CD Mechanism Unit (DLS6C))
Below is the process flow chart of the aging test for the CD Mechanism Unit (DLS6C).
Fig. 1. Reliability Test (Loading)
Fig. 2. Reliability Test (Traverse)
Fig. 3. Reliability Test (Combination)
OPEN
Operation
OPEN wait
fot 1 s
CLOSE
Operation
CLOSE wait
for 5s Count up
First Track
Access
First Track
Play 5 s
Last Track
Access
Last Track
Play 5 s Count up
First Track
Access
First Track
Play 5 s
Last Track
Access
Last Track
Play 5 s
Open
Operation
Open wait
for 1 s
CLOSE
Operation Count up

20
6.4. Self-Diagnostic Mode
FL Display Key Operation
Front Key
Item
Description
Mode Name
To enter into self-diagnostic.Self-Diagnostic
Mode
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))
Service Mode
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.
/l
In Self-Diagnostic Mode:
1. Press [ Open / Close] button
on main unit.
2.To exit,press [POWER ]
button on main unit.
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(Blinking)
(Display 1)
(Display 2)