13.1. Main P.C.B. & CD Interface P.C.B.-------------------47
13.2. Panel, LCD & USB P.C.B.------------------------------49
14 Appendix Information of Schematic Diagram --------- 51
14.1. Voltage Chart----------- -------- --------- ------------------51
15 Exploded View and Replacement Parts List-----------55
15.1. Explo ded View and Mechanical Replacement
Part List-----------------------------------------------------55
15.2. Electrical Replacement Parts List--------------------61
2
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1Safety 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
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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
Caution:
DO NOT SHORT-CIRCUIT DIRECTLY (with a screwdriver blade, for instance), as this may destroy solid st ate 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 in Power ON, FM Tuner at volume minimal mode should be ~ 250
mA (PH).
Current consumption at AC 120 V, 60 Hz in Power ON, FM Tuner at volume minimal mode should be ~ 250 mA (PN).
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.
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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) N0AB2GK00001 (For PN)
2) N0AD2GK00001 (For PH)
Disconnect AC power to discharge the AC Capacitors (C1 (PH), C2) through a 10 Ω, 10 W resistor to ground.
1.5.1.For PN
1.5.2.For PH
5
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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 & DescriptionRemarks
13RGR0443M-A1A REAR APNELPN
13RGR0443N-A2A REAR PANELPH
26RKM07132-K1TOP CABINET
301RAE1044Z-VTRAVERSE UNIT
A2K2CB2CB00022 AC CORDPN
A2K2CQ2YY00119 AC CORDPH
A3RQT9894-MO/I BOOK(En/Sp)
PCB6N0AB2GK00001 SMPS MODULEPN
PCB6N0AD2GK00001 SMPS MODULEPH
6
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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 incid ence 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 e lectrical a ssembly equip ped with ES d evices, plac e the assembly o n a conductive surface such as al uminum foil, to prevent electrostatic charge buildup or exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.
4. Use only an anti-static solder removal device. Some solder removal devices not classified as “anti-static (ESD protected)” can
generate electrical charge sufficient to damage ES devices.
5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices.
6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most
replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or comparable conductive material).
7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material
to the chassis or circuit assembly into which the device will be installed.
CAUTION:
Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the
brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD) sufficient to damage an ES device).
2.2.Precaution of Laser Diode
Caution:
This product utilizes a laser diode with the unit turned “on”, invisible laser radiation is emitted from the pickup lens.
Wavelength: 790 nm (CD)
Maximum output radiation power from pickup: 100 μW/VDE
Laser radiation from the pickup unit is safety level, but be sure the followings:
1. Do not disassemble the pickup unit, since radiation from exposed laser diode is dangerous.
2. Do not adjust the variable resistor on the pickup unit. It was already adjusted.
3. Do not look at the focus lens using optical instruments.
4. Recommend not to look at pickup lens for a long time.
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2.3.General description about Lead Free Solder (PbF)
The lead free solder has been used in the mounting process of all electrical compone nts on the printed circuit boards used for this
equipment in considering the globally environmental conservation.
The normal solder is the alloy of tin (Sn) and lead (Pb). On the other hand, the lead free solder is the alloy mainl y consists of tin
(Sn), silver (Ag) and Copper (Cu), and the melting point of the lead free solder is higher approx.30 degrees C (86°F) more than that
of the normal solder.
Definition of PCB Lead Free Solder being used
The letter of “PbF” is printed either foil side or components side on the PCB using the lead free solder.
(See right figure)
Service caution for repair work using Lead Free Solder (PbF)
• The lead free solder has to be used when repairing the equipment for which the lead free solder is used.
(Definition: The letter of “PbF” is printed on the PCB using the lead free solder.)
• To pu t lead free solder, it should be well molten and mixed with the original lead free solder.
• Remove the remaining lead free solder on the PCB cleanly for soldering of the new IC.
• Since the melting point of the lead free solder is higher than that of the normal lead solder, it takes the longer time to melt the
lead free solder.
• Use the soldering iron (more than 70W) equi pped with the temperature co ntrol after setting the temp erature at 350±30 degrees
C (662±86°F).
Recommended Lead Free Solder (Service Parts Route.)
• The following 3 types of lead free solder are available through the service parts route.
RFKZ03D01K-----------(0.3mm 100g Reel)
RFKZ06D01K-----------(0.6mm 100g Reel)
RFKZ10D01K-----------(1.0mm 100g Reel)
Note
* Ingredient: tin (Sn), 96.5%, silver (Ag) 3.0%, Copper (Cu) 0.5%, Cobalt (Co) / Germanium (Ge) 0.1 to 0.3%
2.4.Handling Precautions for Traverse Unit
The laser diode in the optical pickup unit may break down due to static electricity of clothes or human 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 gene rating 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 uni t 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-
8
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ble cable, cut off the antistatic FPC.
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
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3Service Navigation
Start
Write encrypted UPD bin to CD-R
Turn On main set
Insert CD-R (with UPD bin) and
close
TOC reading
Writing starts:
"0%" -> "20%" -> "40%" ->
"60%" -> "80%" -> 100%"
"CHECKING"
"GOOD" display 3 sec
Set auto turn Off -> Cold Start
End
NG
"NO PLAY"
process end
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 follow ed by supplement service manual to be filed with origi nal service
manual.
Power Consumption in
standby mode (With
"STANDBY BLUETOOTH" set
to "ON")
0.5 W (approximate) (for PN)
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-AKX18PN-K
Front Speakers: SB-AKX18PN-K
0.5 W (approximate)
0.6 W (approximate)
Main Unit: SA-AKX18PN-K
(for PH)
(for PH)
Amplitude modulation (AM)
Frequency range522 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 InputPin jack
Q Disc section
Discs played (8 cm or 12 cm)CD, CD-R/RW(CD-DA, MP3*)
Pick up
Wavelength790 nm(CD)
Q Bluetooth section
Version
OutputClass 2
Supported profileA2DP, AVRCP, SPP
Operating frequency2402 MHz to 2480 MHz
Operating distance10 m line of sight
Q USB section
USB Port
USB standardUSB 2.0 full speed
Media file format support MP3 (*.mp3)
USB device file systemFAT12, FAT16, FAT32
USB port power500 mA (max)
Bluetooth
®
Ver.2.1 +EDR
Q System: SC-AKX18PH-K
Main Unit: SA-AKX18PH-K
Front Speakers: SB-AKX18PN-K
USB recording
Bit rate128 kbps
USB recording speed1x, 3x (CD only)
Recording file formatMP3 (*.mp3)
Q General
Power supplyAC 110 to 127/220 to 240 V,
50/60 Hz (for PH)
AC 120 V, 60 Hz (for PN)
Power consumption50 W
Dimensions (W x H x D)230 mm x 335 mm x 243 mm
Mass2.7 kg
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5Location of Controls and Components
5.1.Remote Control Key Button Operation
5.2.Main Unit Key Button Operation
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6Service 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.
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6.3.Doctor Mode Table
FL Display
Key Operation
Front Key
Item
DescriptionMode Name
Doctor Mode
EEPROM
checksum
check
To enter into Doctor ModeIn 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)
(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 34
6.3.1.Doctor Mode Table 1
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6.3.2.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 TestTo 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 TestTo determine the traverse unit
operation for inner & outer access track.
The counter will
increment by one.
When reach 99999999
will change to 00000000
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.
2. To cancel this mode, press
[0] button on the remote control.
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6.3.3.Doctor Mode Table 3
CD
Self- Adjustment
Test
Item
DescriptionMode Name
To display result of
self-adjustment for CD.
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 -
nd
AOC1O - O X X O O X X -
2
FAGC/TAGC O - O O O X X X X -
AGC2O - O O O O O O O
O : OK;
X : NG (In case that time out happens.)
: Either one of FO AOC, TR AOC and FO
coarse AGC is NG.
: If the AGC is NG (ignore others).
Key Operation
Front Key
In Doctor Mode
:
1. Press [10] [1] [4] button
on the remote control.
To cancel this mode, press [0]
button on the remote control.
CD LSI Version
Check
For checking CD LSI Version and
checksum information.
(Display 1)
Year Develop
(Display 2)
ROM
Type
Checksum (Hex)
In Doctor Mode:
1. Press [4] button on the
remote control.
Version (Decimal)
after
2 sec
To cancel this mode, press [0]
button on the remote control.
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6.4.Self-Diagnostic Mode
FL Display
Key Operation
Front Key
Item
DescriptionMode Name
Self Diagnostic
Mode
To enter into self diagnostic checkingStep 1: Select CD mode
(Ensure no disc is inserted).
To exit, press [8] 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 CodeDiagnostic ContentsDescription of errorAutomatic FL DisplayRemarks
CD H15CD Open AbnormalDuring 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 H16CD Closing AbnormalDuring operation
POS_SW_CEN On fail to
be detected with 4 sec.
Error No. shall be clear by
force or during cold start.
Press [
] on main unit for
next error.
F26Communication between
CD servo LSI and micro-p
abnormal.
During switch to CD function, if SENSE = “L” within
failsafe time of 20ms.
Press [
] on main unit for
next error.
6.5.Self-Diagnostic Error Code Table
Self-Diagnostic Function provides information on any problems occurring for the unit and its respective components by displaying
the error codes. These error code such as U**, H** and F** are stored in memory and held unless it is cleared.
The error code is automatically display after entering into self-diagnostic mode.
6.5.1.Power Supply Error Code Table
6.5.2.CD Mechanism Error Code Table
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7Troubleshooting Guide
“Contents for this section is not available at time of issue”
18
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8Disassembly and Assembly Instructions
• Illustration is based on SA-AKX18PH-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 component s an d P.C.B Locations” as descr ibed in this se rvi ce
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 LCD P.C.B.
• Disassembly of USB P.C.B.
• Disassembly of Rear Panel
• Disassembly of Main P.C.B.
• Disassembly of SMPS Module 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
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8.3.Main Components and P.C.B. Locations
20
Page 21
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 8P Cable Wire at the connector (CN2502) on
Main P.C.B..
Step 2 Detach 17P FFC at the connector (CN2500) on Main
P.C.B..
Step 3 Release tabs on both side of the Front Panel Unit.
Step 4 Slightly lift up to remove Top Cabinet.
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Page 22
Step 4 Release tabs at bottom of unit.
Step 5 Detach to remove Front Panel Unit
8.6.Disassembly of Panel P.C.B.
and LCD P.C.B.
• Refer to “Disassembly of Top Cabinet”.
• 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.
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Step 5 Remove Panel P.C.B. and LCD P.C.B..
8.7.Disassembly of USB P.C.B.
• Refer to “Disassembly of Top Cabinet”.
• Refer to “Disassembly of Front Panel Unit”.
• Refer to “Disassembly of Panel P.C.B. and LCD P.C.B.
Step 3 Lift up Inner Chassis Unit to release the catches
between the Inner Chassis Unit and the Rear Panel.
Step 4 Release tabs.
Step 5 Release Rear Panel.
8.9.Disassembly of Main P.C.B.
• Refer to “Disassembly of Top Cabinet”.
• Refer to “Disassembly of Rear Panel”.
Step 1 Detach 10P Cable Wire at the connector (CON2) on
SMPS P.C.B..
Step 2 Detach 24P FFC at the connector (P2005) on Main
P.C.B..
Step 3 Detach 10P FFC at the connector (P2004) on Main
P.C.B..
Step 4 Detach 17P FFC at the connector (CN2500) on Main
P.C.B..
Step 5 Detach 8P Cable at the connector (CN2502) on Main
P.C.B..
Step 6 Remove 2 screws.
Step 7 Remove Main P.C.B..
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Page 25
8.10.Disassembly of SMPS Module
and Voltage Selector P.C.B.
• Refer to “Disassembly of Top Cabinet”.
• Refer to “Disassembly of Rear Panel”.
Step 1 Detach 10P Cable Wire at the connector (CON2) on
SMPS Module.
Step 2 Remove 2 screws.
Step 3 Release catch.
Step 4 Remove SMPS Module and Voltage Selector P.C.B..
Step 2 Detach Voltage Selector P.C.B..
Step 3 Detach 10P FFC at a connector (P2004) on Main
P.C.B..
Step 4 Detach 24P FFC at a connector (P2005) on Main
P.C.B..
Step 5 Remove 1 screw.
8.11.Disassembly of CD Mechanism Unit
• Refer to “Disassembly of Top Cabinet”.
• Refer to “Disassembly of Front Panel Unit”.
Step 1 Remove 8 screws.
Step 6 Remove 1 screw.
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Step 7 Release catches.
Step 8 Detach Inner Chassis Unit.
8.12.Disassembly of CD Interface
P.C.B.
• Refer to “Disassembly of Top Cabinet”.
• Refer to “Disassembly of Front Panel Unit”.
• Refer to “Disassembly of CD Mechanism Unit”.
Step 1 Remove 2 screws.
Step 2 Desolder pins of the motor (M7301).
Step 3 Desolder pins of the motor (M7302).
Step 4 Remove CD Interface P.C.B..
Step 9 Remove 2 screws.
Step 10 Remove CD Mechanism Unit.
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9Service Position
Note: For description of the disassembly procedures, see
the Section 8.
9.1.Checking of Panel P.C.B. and
LCD P.C.B.
Step 1 Remove Top Cabinet.
Step 2 Remove Front Panel Unit.
Step 3 Remove the Panel P.C.B. and the LCD P.C.B..
Step 4 Positioned the Panel P.C.B. and LCD P.C.B. on the
insulated material as shown.
Step 5 Attach 17P FFC at a connector (CN2500) on the Main
P.C.B..
Step 6 Panel P.C.B. and LCD P.C.B. can be checked as diagram shown.
9.2.Checking and Repairing of
Main P.C.B. and SMPS P.C.B.
Step 1 Remove Top Cabinet.
Step 2 Remove Front Panel Unit.
Step 3 Remove Rear Panel.
Step 4 Remove Main P.C.B..
Step 5 Remove SMPS Module and Voltage Selector P.C.B..
Step 6 Positioned the Main P.C.B., SMPS Module and the Volt-
age Selector P.C.B. on the insulated material.
Step 7 Attach 10P Cable at a connector (CON2) on the SMPS
Module.
Step 8 Attach 10P FFC at a connector (P2004) on the main
P.C.B..
Step 9 Attach 24P FFC at a connector (P2005) on the Main
P.C.B..
Step 10 Attach 17P FFC at a connector (CN2500) on the Main
P.C.B..
Step 11 Main P.C.B. and SMPS P.C.B. can be checked as diagram shown.
27
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28
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10 Block Diagram
SA-AKX18PH/PN SYSTEM CONTROL (1/2) BLOCK DIAGRAM
TO SYSTEM CONTROL
BLOCK (2/2)
: AUDIO OUTPUT SIGNAL LINE
: CD AUDIO INPUT SIGNAL LINE
: USB SIGNAL LINE
+
+
117
CN9000CN2500
KEY2
KEY2 34
KEY2
MANUAL EQ
S9006
USB REC/PAUSE
S9008
RWD
S9009
FWD
S9010
D.BASS
S9007
126
CN9000CN2500
KEY3
KEY3 38
KEY3
ALBUM/TRACK
S9011
USB/CD
S9013
RADIO/AUX
S9014
PLAY/PAUSE
S9015
BT
S9012
513
CN9000CN2500
VOL JOG
VOL JOG 36
VOL JOG
VOLUME
VR9000
414
CN9000CN2500
ROT JOG
ROT JOG 41
ROT JOG
CONTROL
VR9001
108
CN9000CN2500
KEY1
KEY1 39
KEY INT 32
KEY1
POWER
S9001
TUNE MODE/STOP
S9003
DJ JUKEBOX
S9004
LATIN/PRESET EQ
S9005
OPEN/CLOSE
S9002
PANEL P.C.B.
6
12
CN9000CN2500
LCD DRIVER
C0HBA0000295
IC900
LCD DATA 24
4
DATA
810
CN9000CN2500
LCD WR 23
711
CN9000CN2500
LCD CE 21
44
ZJ6000*ZJ9001*
LCD DATA
55
ZJ6000*ZJ9001*
LCD WR
66
ZJ6000*ZJ9001*
LCD CE
LCD DATA
LCD WR
LCD CE
153
CN9000CN2500
LED DIMMER 22
22
ZJ6000*ZJ9001*
LED DIMMERLED DIMMER
3
/WR
1
/CS
DP900
LCD
+5V
Q900
LED DRIVE
Q2002
SWITCH
LCD P.C.B.
COM0 ~ COM3
SEG0 ~ SEG31
D993
99
CN9000CN2500
+3.3V
REMOTE SENSOR
IR9000
RMTRMT
SOC
C1AB00004188
IC2001
MAIN P.C.B.
NOTE: “ * ” REF IS FOR INDICATION ONLY
REM IN
120
AC50
BD51
E54
F55
MD56
LDO57
TRDRV62
SPDRV64
TRVDRV63
INNER SW31
OPEN SW29
CLOSE SW30
LD CCW6
LD CW5
FODRV61
56
CN7002 P2004
OPEN SW
83
CN7002 P2004
CLOSE SW
SPM-
92
CN7002 P2004
SPM+
101
CN7002 P2004
TRV+
110
CN7002 P2004
TRV-
29
CN7002 P2004
LDM+
38
CN7002 P2004
LDM-
LDM+
LDM-
47
CN7002 P2004
SPINDLEMOTOR
M7302*
TRAVERSE MOTOR
M7301*
CD INTERFACE P.C.B.
+3.3V
Q2001
LASER DRIVE
23VINLD
5CH MOTOR DRIVER
C0GBY0000117
IC2004
VOLD+17
VOLD-18
VOSL+11
VOSL-12
VOFC+14
VOFC-13
VOTK-16
VOTK+
F+
F-
T-
T+
CD-LD
MD/LPD
15
VOTR+10
VOTR-9
26VINTK
7REV
6FWD
23
P2005
24
P2005
21
P2005
22
P2005
6
P2005
5
P2005
OPEN SW
3
CN7001
CLOSE SW
1
CN7001
1VINFC
16
P2005
15
P2005
20
P2005
19
P2005
10
P2005
14
P2005
4VINSL+
OPTICAL
PICKUP UNIT
LOADING P.C.B.
CLOSE SW
OPEN SW
74
CN7002 P2004
RESET SWRESET SW
5
CN7001
LDM+
4
CN7001
LDM-
SPM-
SPM+
TRV+
TRV-
CD MECHANISM UNIT
CD TRACKING SIGNAL
RESET
S7201
10.1.System Control
29
Page 30
: CD AUDIO INPUT SIGNAL LINE
TO SYSTEM CONTROL
BLOCK (1/2)
: AUDIO OUTPUT SIGNAL LINE
FROM/TO POWER SUPPLY
USB-B
USB-A
BT PCONT
PCONT1
PCONT2
PROTECT
SMPS ID
TEMP DET
SYNC
DC DET PWR
NRST
USB OVC
: USB SIGNAL LINE
USB-B
USB-A
BT PCONT
PCONT1
PCONT2
PROTECT
SMPS-ID
TEMP DET
SYNC
DC DET PWR
NRST
USB OVC
IC2003
RFKWFAKX18LM
16MB
FLASH MEMORY
1CS#
2DO(DQ1)
WP#(DQ2)
DI(DQ0)
CLK
HOLD#(DQ3)
MAIN P.C.B.
IC2001
C1AB00004188
SOC
USB-B
4
USB-A
10
9
BT PCONT
PCONT1(POWER)
25
26
PCONT2(PCONT)
107
PROTECT
37
SMPS ID
40
TEMP DET
121
SYNC
109
DC DET PWR
1
NRST
USB OVC
94
FLASH CS
88
FLASH DAT1
87
FLASH DAT2386
FLASH DAT0591
FLASH CLK690
FLASH DAT3789
USB MUX OE 13
XTAL32.768K
XTAL32.768K
XTAL16.9344M
XTAL16.9344M
USB REC LED 14
USB SEL 2
USB D- 97
USB D+ 98
IC2500
C1CB00003106
SELECTOR
SELECT
10
OE
8
D-
5
D+
3
2
124
X2002
125
127
X2001
128
USB-7USB+1iPod-6iPod+
USB A D-
USB A D+
USB B D-
USB B D+
Q2500
+5V
SWITCH
PW D5V
ZJ9301*CN2502
22
ZJ9301*CN2502
11
ZJ9301*CN2502
33
ZJ9301*CN2502
44
CN2502 ZJ9301*
88
USB P.C.B.
USB A D-
USB A D+
USB B D-
USB B D+
PW D5V
D9300
+5V
+5V
JK9300
USB PORT A
1 VBUS
2D-
3D+
JK9301
USB PORT B
1 VBUS
2D-
3D+
QR2500
LED DRIVE
BLUETOOTH
DEVICE
NOTE: “ * ” REF IS FOR INDICATION ONLY
FREQUENCY
IC2002
RFKWEAKX18LM
EEPROM
IC7000*
BLUETOOTH
MODULE
UART TX
UART RX
HOST WAKE
LDO ON
BT CTS
118
6SCL
5SDA
I2C SCL
119
I2C SDA
QR2002
FAN OUT2 15
101
2
4
11
13
15
102
106
105
103
BT UART RX
BT UART TX
HOST WAKE
BT WAKE
BT UART RTS
SWITCH
SA-AKX18PH/PN SYSTEM CONTROL (2/2) BLOCK DIAGRAM
30
Page 31
10.2.Audio
SA-AKX18PH/PN AUDIO BLOCK DIAGRAM
: TUNER/AUX AUDIO INPUT SIGNAL LINE: AUDIO OUTPUT SIGNAL LINE: CD AUDIO INPUT SIGNAL LINE
: FM SIGNAL LINE: AM SIGNAL LINE
2
1
X6500
42 XO
41 XI
81
83
81
I2S SDO0
82 I2S BCK
82 DSP SDA
75 DSP SCL
83 I2S WCK
I2S WCK
I2S BCK
10 BCK
8 SDIN1
9 LRCK
3 SMUTE
272RST NDSP RESET
77DSP MUTE
76DSP SDA
75DSP SCL
4 SDA
73DSP ERROR
16 ERRIN
93DAMP VALID
74DC DET AMP FAN
24 VALID
5 SCL
DSP
VUEALLPT090
IC6500
MAIN P.C.B.
+32V
Q6007,Q6300
DC DETECT
CIRCUIT
Q6001,Q6002
SPEAKERS
OUT D
27
OUT D
28
OUT C
32
BST D
23
BST C
24
OUT A
40
OUT A
39
OUT B
35
BST A
44
BST B
43
-
+
4
JK6000
3
JK6000
+
-
RIGHT
LEFT
1
JK6000
2
JK6000
POWER AMPLIFIER
C1AB00003994
IC6000
6
INPUT B
PWM1B 27
5
INPUT A
PWM1A 28
14
INPUT C
PWM2A 30
15
INPUT D
PWM2B 29
DOUT
FM ANT
JK51
FM/AM
RADIO RECEIVER
VUEALLPT087
IC52
LIN 15
RIN 16
GCGPIO2 18
DCLK 17
DFS 14
SDIO 8
SCLK 7
RST 5
2 FMI
AM ANT
JK52
L52
4
6
3
1
2
4 AMI
13
SOC
C1AB00004188
IC2001
4 /RESET
17 DAMP OTW
DAMP OTW
122
TUN SDO
112
TUN WCK
110
TUN RST
117
TUN INT
116
TUN BCK
111
L
R
AUX IN
JK6002
3
1
2
AUX-R
AUX-L
31
Page 32
10.3.Power Supply
SA-AKX18PH/PN POWER SUPPLY BLOCK DIAGRAM
D9301
D1007
D1006
D1001
PW SYS 3R3V
PW SYS 3R3V
PW SYS 3R3V
PW SYS 3R3V
3 VIN
+3.3V VOLTAGE
REGULATOR
C0DBGYY03909
IC1005
VOUT 2
4 VIN
1CE
+5V VOLTAGE
REGULATOR
C0DBGYY00969
IC7001
VOUT 3
2 VIN
VOLTAGE
DETECTOR
C0EBY0000861
IC2005
VOUT 1
3 VIN
+3.3V VOLTAGE
REGULATOR
C0DBGYY03909
IC1000
VOUT 2
PW SYS 3R3V
+3.3V
PW SOC 1R5V
+1.5V
PW 32V
+32V
PW 12V
+12V
PW 3R3V
+3.3V
PW 6V
+6V
+5V
+5V
PROTECT
PROTECT
PCONT2
PCONT2
NRST
NRST
BT PCONT
BT PCONT
PCONT1
PCONT1
FROM/TO
SYSTEM CONTROL
FROM/TO
SYSTEM CONTROL
MAIN P.C.B.
NOTE: “ * ” REF IS FOR INDICATION ONLY
-10
- ZJ1002*
PCONT2
-6
- ZJ1002*
PROTECT
1,2-
ZJ1002*-
32.5V
5-
ZJ1002*-
5V
PW BT 5V
+5V
4 VIN
1CN
+1.5V VOLTAGE
REGULATOR
C0DBGYY00911
IC1004
VO 3
PW SOC 1R5V
9-
ZJ1002*-
SYNC
7-
ZJ1002*-
SMPS-ID
8-
ZJ1002*-
TEMP DET
SWITCHING MODE
POWER SUPPLY
CIRCUIT
AC INLET
SMPS MODULE
DC DET PWR
DC DET PWR
66
ZJ9301*CN2502
+5V
USB P.C.B.
LCD P.C.B.PANEL P.C.B.
PW USBA 5VPW USBA 5V
77
ZJ9301*CN2502
+5V
PW USBB 5V
PW USBA 5V
PW USBB 5V
+5V
PW 5V
+3.3V
PW 3R3V
PW USBB 5V
144
CN9000CN2500
+3.3V
PW SYS 3R3VPW SYS 3R3VPW SYS 3R3V
171
CN9000CN2500
11
ZJ6000*ZJ9001*
PW 5VPW 5V
162
CN9000CN2500
33
ZJ6000*ZJ9001*
PW 3R3VPW 3R3V
PW 16V
PW 6V
PW 6V
10PH3EN
1BOOT
7VSENSE
2
3
2
VIN
+16V DC-DC
CONVERTER
C0DBAYY01594
IC1002
10PH
EN
1BOOT
7VSENSE
VIN
+6V DC-DC
CONVERTER
C0DBAYY01594
IC1003
32.5V
16V
USB OVC
USB OVC
SMPS-ID
SMPS ID
TEMP-DET
TEMP DET
SYNC
SYNC
USB-B
USB-B
USB-A
USB-A
D1005
Q1000
D1002
+12V VOLTAGE
REGULATOR
PW 12V
PW 3R3V
PW 16V
HIGH SIDE
SWITCH
C0DBZYY00716
IC2502
PW USBB 5V
PW USBA 5V
PW USB5V
PW 5V
5 VIN1VOUT
3/OC
4EN
HIGH SIDE
SWITCH
C0DBZYY00716
IC2501
5 VIN1VOUT
3/OC
4EN
32
Page 33
11 Wiring Connection Diagram
SA-AKX18PH/PN WIRING CONNECTION DIAGRAM
NOTE: " * " REF IS FOR INDICATION ONLY.
TO CD LOADING P.C.B.
(CD MECHANISM UNIT)
CN7002
CN7001
10P
5P
TO OPTICAL PICKUP UNIT
(CD MECHANISM UNIT)
TO SMPS MODULE P.C.B.
CN2502
P2005P2004
CN1000
ZJ9301*
ZJ6000*
ZJ9001*
CN9000
8P
CN2500
17P
10P
8P
7P
7P
17P
10P24P
MAIN P.C.B.
A
PANEL P.C.B.
B
LCD P.C.B.
C
USB P.C.B.
D
CD INTERFACE P.C.B.
E
33
Page 34
34
Page 35
12 Schematic Diagram
12.1.Schematic Diagram Notes
• This schematic diagram may be modified at any time
• Important safety notice:
Components identified by mark have special characteris-
tics important for safety.
Furthermore, special parts which have purposes of fire-retardant (resistors), high quality sound (capacitors), low-noise
(resistors), etc are used.
When replacing any of components, be sure to use only
manufacturer’s specified parts shown in the parts list.
Power switch ().
Open/Close switch ( ).
Play/Pause ( / ) switch.
• Resistor
Unit of resistance is OHM [Ω] (K=1,000, M=1,000,000).
• Capacitor
Unit of capacitance is μF, unless otherwise noted. F=Farads,
pF=pico-Farad.
• Coil
Unit of inductance is H, unless otherwise noted.
• *
REF IS FOR INDICATION ONL Y.
• Voltage and signal line
: +B signal line
: CD Audio input signal line
: AUX/Tuner Audio input signal line
: Audio output signal line
: USB signal line
: AM signal line
: FM signal line
• Indication Voltage Values are in standard values for the unit mea sured by the DC electronic circuit tester (hig h-impedance) with
the chassis taken as standard.
Therefore, there may exist some errors in voltage values, depending on the internal impedance of the DC circuit tester.
• Circuit voltage and waveform described herein shall be regarded as reference information when probing defect poi nt because it
may differ from actual measuring value due to difference of Measuring instrument and its measuring condition and product itself.
14.1.1.Main P.C.B. (1/3)
51
Page 52
14.1.2.Main P.C.B. (2/3)
.
REF NO.
MODE81828384858687888990919293949596979899100
CD PLAY0.71.61.6002.91.12.72.90.20.21.63.33.303.20000