Panasonic SA-AKX57PN User manual

© Panasonic Corporation 2013. All rights reserved.
Unauthorized copying and distribution is a violation
of law.
PSG1307005CE
CD Stereo System
Model No. SA-AKX57PN
SA-AKX77PH
SA-AKX77PN
SC-AKX57PN
SC-AKX77PH
SC-AKX77PN
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)-------------------------------- 4
1.3. Before Repair and Adjustment ------------------------- 4
1.4. Protection Circuitry ---------------------------------------- 4
1.5. Caution For Fuse Replacement------------------------ 4
1.6. Safety Parts Information --------------------------------- 5
2 Warning -------------------------------------------------------------- 6
2.1. Prevention of Electrostatic Discharge (ESD)
to Electrostatically 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 Ass’y ------------9
2.5. Grounding for electrostatic breakdown
prevention-------------------------------------------------- 10
3 Service Navigation --------------------------------------------- 11
3.1. Service Information -------------------------------------- 11
3.2. Firmware Update Procedure -------------------------- 11
4 Specifications ---------------------------------------------------- 12
5 General/Introduction------------------------------------------- 13
5.1. Media Information---------------------------------------- 13
6 Location of Controls and Components------------------ 14
6.1. Remote Control Key Button Operation ------------- 14
6.2. Main Unit Key Button Operation---------------------- 15
Please refer to the original service manual for:
CD Mechanism Unit (BRS11C), Order No. PSG1102001CE
Speaker system SB-AKX76PN-K, Order No. PSG1304024CE (For SA-AKX77PN/PH)
Speaker system SB-AKX56PN-K, Order No. PSG1304049AE (For SA-AKX57PN)

2
7 Installation Instructions--------------------------------------- 16
7.1. Speaker and A/C Connection ------------------------- 16
8 Service Mode ----------------------------------------------------- 17
8.1. Cold-Start--------------------------------------------------- 17
8.2. Service Mode Table-------------------------------------- 17
8.3. Doctor Mode Table--------------------------------------- 18
8.4. Reliability Test Mode (CD Mechanism Unit)------- 21
8.5. Self-Diagnostic Mode ----------------------------------- 22
8.6. Self-Diagnostic Error Code Table -------------------- 22
8.7. Sales Demonstration Lock Function ---------------- 23
9 Troubleshooting Guide---------------------------------------- 24
10 Disassembly and Assembly Instructions--------------- 25
10.1. Screw Types----------------------------------------------- 25
10.2. Disassembly Flow Chart-------------------------------- 26
10.3. Main Components and P.C.B. Locations ----------- 27
10.4. Disassembly of Top Cabinet--------------------------- 28
10.5. Disassembly of Front Panel Unit --------------------- 29
10.6. Disassembly of Panel P.C.B., Memory LED
P.C.B. and Music Port P.C.B.-------------------------- 30
10.7. Disassembly of Remote Sensor P.C.B.------------- 31
10.8. Disassembly of Bluetooth P.C.B. --------------------- 31
10.9. Disassembly of USB P.C.B. --------------------------- 32
10.10. Disassembly of Rear Panel---------------------------- 32
10.11. Disassembly of Main P.C.B. --------------------------- 33
10.12. Disassembly of SMPS P.C.B. and Voltage
Selector P.C.B.-------------------------------------------- 34
10.13. Disassembly of CD Mechanism Unit ----------- 35
10.14. Disassembly of CD Interface P.C.B.----------------- 37
10.15. Disassembly of Fan Unit ------------------------------- 37
11 Service Position ------------------------------------------------- 38
11.1. Checking of Panel P.C.B. ------------------------------ 38
11.2. Checking of Main P.C.B. (Side A)-------------------- 38
11.3. Checking of Main P.C.B. (Side B)-------------------- 38
11.4. Checking of SMPS P.C.B. (Side A)------------------ 39
12 Block Diagram --------------------------------------------------- 41
12.1. Servo & System Control-------------------------------- 41
12.2. Audio -------------------------------------------------------- 43
12.3. Power Supply --------------------------------------------- 47
13 Wiring Connection Diagram --------------------------------- 49
14 Schematic Diagram--------------------------------------------- 51
14.1. Schematic Diagram Notes ----------------------------- 51
14.2. MAIN (CD Servo) Circuit ------------------------------- 53
14.3. MAIN (Micon) Circuit ------------------------------------ 57
14.4. MAIN (Damp) Circuit ------------------------------------ 63
14.5. Bluetooth Circuit ------------------------------------------ 67
14.6. Panel Circuit----------------------------------------------- 68
14.7. USB, Music Port, Memory LED & Remote
Sensor Circuit --------------------------------------------- 70
14.8. SMPS Circuit ---------------------------------------------- 71
14.9. Voltage Selector & CD Interface Circuit ------------ 73
15 Printed Circuit Board ------------------------------------------ 74
15.1. Main P.C.B. ------------------------------------------------ 74
15.2. Bluetooth, Remote Sensor & CD Interface
P.C.B.-------------------------------------------------------- 76
15.3. Panel, USB, Music Port & Memory LED
P.C.B.-------------------------------------------------------- 77
15.4. SMPS & Voltage Selector P.C.B.--------------------- 78
16 Appendix Information of Schematic Diagram --------- 79
16.1. Voltage Chart---------------------------------------------- 79
17 Exploded View and Replacement Parts List ----------- 87
17.1. Exploded View and Mechanical Replacement
Part List ---------------------------------------------------- 87
17.2. Electrical Replacement Parts List ------------------- 95

3
1 Safety Precautions
1.1. General Guidelines
1. IMPORTANT SAFETY NOTICE
There are special components used in this equipment which are 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. 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.
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 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 1Mand 5.2M.
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 1.5k, 10 watts resistor, in parallel with a 0.15F 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. 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

4
1.2. Before Use (For PH only)
Be sure to disconnect the mains cord before adjusting the voltage selector as shown in Figure 1-2.
Use a minus(-) screwdriver to set the voltage selector (on the rear panel) to the voltage setting for the area in which the unit will be
used.
Note that this unit will be seriously damaged if this setting is not made correctly. (There is no voltage selector for some countries,
the correct voltage is already set.)
Figure 1-2
1.3. Before Repair and Adjustment
Disconnect AC power to discharge unit AC Capacitors as such (C5701, C5702, C5703, C5704, C5705, C5706, C5707, C5708)
through a 10 , 10 W resistor to ground.
Caution:
DO NOT SHORT-CIRCUIT DIRECTLY (with a screwdriver blade, for instance), as this may destroy solid state devices.
After repairs are completed, restore power gradually using a variac, to avoid overcurrent.
Current consumption at AC 110~127 V / 220~240 V, 50/60 Hz in Power ON, FM Tuner at volume minimal mode should be ~ 750
mA (PH).
Current consumption at AC 120 V, 60 Hz in Power ON, FM Tuner at volume minimal mode should be ~ 500 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.
1.5. Caution For Fuse Replacement

5
1.6. Safety Parts Information
Safety Parts List:
There are special components used in this equipment which are important for safety.
These parts are marked by in the Schematic Diagrams, Exploded View & Replacement Parts List. It is essential that these
critical parts should be replaced with manufacturer’s specified parts to prevent shock, fire or other hazards. Do not modify the
original design without permission of manufacturer.
Safety Ref. No. Part No. Part Name & Description Remarks
16 RGR0443E-C1A REAR PANEL AKX77PN
16 RGR0443F-BA REAR PANEL AKX77PH
16 RGR0443G-C1A REAR PANEL AKX57PN
17 RKM0713-K1 TOP CABINET
45 REXX1123-K 1P RED WIRE (VOLTAGE SELECTOR-SMPS) AKX77PH
46 REXX1122-K 1P BLACK WIRE (VOLTAGE SELECTOR-SMPS) AKX77PH
301 RAE1036Z-V TRAVERSE ASS’Y
A2 K2CB2CB00022 AC CORD AKX57PN, AKX77PN
A2 K2CQ2YY00119 AC CORD AKX77PH
A3 RQT9858-M O/I BOOK (Sp/En)
PCB8 REP4965J SMPS P.C.B. (RTL)AKX57PN
PCB8 REP4965H SMPS P.C.B. (RTL)AKX77PN
PCB8 REP4965G SMPS P.C.B. (RTL)AKX77PH
PCB9 REP4965G VOLTAGE SELECTOR P.C.B. (RTL)AKX77PH
DZ5701 D4EAY511A127 VARISTOR (E.S.D)
S5701 K0ABCA000007 VOLTAGE SELECTOR AKX77PH
L5701 G0B183J00002 LINE FILTER
L5702 G0B183J00002 LINE FILTER
T5701 G4DYZ0000069 TRANSFORMER AKX57PN
T5701 G4DYZ0000070 TRANSFORMER AKX77PH, AKX77PN
T5751 G4DYZ0000064 TRANSFORMER AKX57PN
T5751 G4DYZ0000065 TRANSFORMER AKX77PH, AKX77PN
T6000 G4DYA0000214 TRANSFORMER
F1 K5D802APA008 FUSE AKX57PN, AKX77PN
F1 K5D802BK0004 FUSE AKX77PH
PC5701 B3PBA0000579 PHOTO COUPLER
PC5702 B3PBA0000579 PHOTO COUPLER
PC5720 B3PBA0000579 PHOTO COUPLER
PC5799 B3PBA0000579 PHOTO COUPLER
P5701 K2AA2B000011 AC INLET AKX77PH
P5701 K2AB2B000007 AC INLET AKX57PN, AKX77PN
R5708 D0GF155JA048 1.5M 1/4W AKX57PN, AKX77PH
R5708 ERJ8GEYJ105V 1M 1/4W AKX77PN
R5709 D0GF155JA048 1.5M 1/4W AKX57PN, AKX77PH
R5709 ERJ8GEYJ105V 1M 1/4W AKX77PN
C5701 F0CAF104A105 0.1uF
C5702 F0CAF104A105 0.1uF AKX57PN, AKX77PH
C5702 F0CAF224A105 0.22uF AKX77PN
C5703 F0CAF104A105 0.1uF AKX57PN, AKX77PH
C5703 F0CAF224A105 0.22uF AKX77PN
C5704 F1BAF471A013 470pF
C5705 F1BAF471A013 470pF
C5706 F1BAF471A013 470pF
C5707 F1BAF471A013 470pF
C5708 F1BAF471A013 470pF

6
2Warning
2.1. Prevention of Electrostatic Discharge (ESD) to Electrostatically Sensi-
tive (ES) Devices
Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Elec-
trostatically Sensitive (ES) Devices.
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: 790 nm (CD)
Maximum output radiation power from pickup: 100 W/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 Ass’y
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.
Figure 2-2

10
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 environ-
ment.
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 from your body Figure 2-3.
Figure 2-3

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.
3.2. Firmware Update Procedure
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
OK
NG "NO PLAY"
process end

12
4 Specifications
Amplifier section
RMS output power stereo mode
Front Hi 250 W per channel (3 ),
1 kHz, 30% THD
Front Lo 250 W per channel (3 ),
100 Hz, 30% THD
AKX77
Subwoofer Ch 400 W per channel (2 ),
100 Hz, 30% THD
Total RMS stereo mode power
AKX77 1400 W (30% THD)
AKX57 1000 W (30% THD)
Tuner, terminals section
Preset memory FM 30 stations
AM 15 stations
Frequency modulation (FM)
Frequency range 87.50 MHz to 108.00 MHz
(50 kHz step) (for PH)
87.5 MHz to 108.0 MHz
(100 kHz step) (for PN)
87.9 MHz to 107.9 MHz
(200 kHz step) (for PN)
Antenna terminals 75 (unbalanced)
Amplitude modulation (AM)
Frequency range 522 kHz to 1629 kHz
(9 kHz step) (for PH)
520 kHz to 1630 kHz
(10 kHz step) (for PH)
520 kHz to 1710 kHz
(10 kHz step) (for PN)
Music port (front)
Sensitivity 100 mV, 4.7 k
Terminal Stereo, 3.5 mm jack
Aux Input Pin jack
Disc section
Discs played (8 cm or 12 cm) CD, CD-R/RW (CD-DA, MP3*)
Pick up
Wavelength 790 nm (CD)
Audio output (disc)
Number of channels
AKX77 2.1 ch (FL, FR, SW)
AKX57 2 ch (FL, FR)
FL = Front left channel
FR = Front right channel
SW = Subwoofer channel
*MPEG-1 Layer 3
Internal memory section
Memory
Memory size 2 GB
Media file format support MP3 (*.mp3)
Memory recording
Bit rate 128 kbps
Memory recording speed 1x, 3x max (CD only)
Recording file format MP3 (*.mp3)
Capacity of total songs recorded 510 songs
(use 128 kbps, approximately 1 song = 4 mins)
USB section
USB Port
USB standard USB 2.0 full speed
Media file format support MP3 (*.mp3)
USB device file system FAT12, FAT16, FAT32
USB port power 500 mA (max)
Bit rate 16 kbps to 320 kbps (playback)
USB recording
Bit rate 128 kbps
USB recording speed 1x, 3x max (CD only)
Recording file format MP3 (*.mp3)
Bluetooth®section
Bluetooth®system specification V 3.0
Wireless equipment classification Class 2
Supported profiles A2DP, AVRCP, GAVDP
Frequency band 2402 MHz to 2480 MHz
(Adaptive Frequency Hopping)
Driving distance 10 m line of sight
General
Power supply AC 110 to 127/220 to 240 V,
50/60 Hz (PH)
AC 120 V, 60 Hz (PN)
Power consumption
AKX77 125 W (for PH)
120 W (for PN)
AKX57 105 W
Dimensions (W x H x D) 220 mm x 334 mm x 250 mm
Mass
AKX77 3.4 kg
AKX57 3.3 kg
Operating temperature range 0 C to +40 C
Operating humidity range 35% to 80% RH
(no condensation)
Power consumption in standby 0.3 W (approximate) (PH)
mode 0.2 W (approximate) (PN)
Note:
1. Specifications are subject to change without notice.
Mass and dimensions are approximate.
2. Total harmonic distortion is measured by the digital spectrum
analyzer.
System: SC-AKX57PN-K
Main Unit: SA-AKX57PN-K
Speaker System: SB-AKX56PN-K
System: SC-AKX77PN/PH-K
Main Unit: SA-AKX77PN/PH-K
Speaker System: SB-AKX76PN-K

13
5 General/Introduction
5.1. Media Information

14
6 Location of Controls and Components
6.1. Remote Control Key Button Operation

15
6.2. Main Unit Key Button Operation

16
7 Installation Instructions
7.1. Speaker and A/C Connection
Connect the AC power supply cord only after all the
other connections have been made.
The illustrations shown are of SC-AKX77 for South
America (except Argentina and Brazil). Your unit may
differ in appearance.
1Connect the AM loop antenna.
Stand the antenna up on its base until it clicks.
2Connect the FM indoor antenna.
Place the antenna where reception is best.
3Connect the speakers.
Connect the speaker cables to the terminals of the
same color.
4For PH only
Set the voltage.
5Connect the AC power supply cord.
Do not use an AC power supply cord from other
equipment.
Conserving power
The system consumes a small amount of power
even when it is in standby mode. Disconnect the
power supply if you do not use the system.
Some settings will be lost after you disconnect the
system. You have to set them again.
1
2
3a
5
3b
4
B
A
Tape
(not supplied)
AKX77
AKX77 AKX57
3a
Use a flat-head screwdriver to
set the voltage selector to the
AC voltage in your area.
For PH only
If the power plug does not fit your socket, use the
supplied power plug adapter.
3b
AKX77
To household
AC outlet

17
8 Service Mode
8.1. 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
8.2. Service Mode Table

18
8.3. Doctor Mode Table
8.3.1. Doctor Mode Table 1
FL Display
Key Operation
Front Key
Item
DescriptionMode Name
Doctor Mode
EEPROM
checksum
check
:edoMDCnIedoMrotcoDotniretneoT
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 3 4

19
8.3.2. 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 Test To determine the open & close
operation of the CD Mechanism Unit.
Note: Refer to Section 8.3 Figure 8-2
for process flow
Note: Refer to Section 8.3 Figure 8-3
for process flow
Note: Refer to Section 8.3 Figure 8-1
for process flow
.
The counter will
increment by one.
When reach 99999999
will change to 00000000
Cancellation Display
Traverse Test To determine the traverse unit
operation for inner & outer access track.
The counter will
increment by one.
When reach 99999999
will change to 00000000
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.

20
8.3.3. Doctor Mode Table 3
FL Display
Key Operation
Front Key
Item
DescriptionMode Name
CD
Self- Adjustment
Test
To display result of
self-adjustment for CD operation.
CD LSI Version
Check
To check the CD LSI Version and
its checksum.
In Doctor Mode:
1. Press [10] [1] [4] button
on the remote control.
In Doctor Mode:
1. Press [4] button on the
remote control.
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 -
2
nd
AOC1 O - O X X O O X X -
FAGC/TAGC O - O O O X X X X -
AGC2 O - O O O O O O O
O : OK;
X : NG (In case that time out happens.)
: Either one of FO AOC, TR AOC and FO
coarse AGC is NG.
: If the AGC is NG (ignore others). To cancel this mode, press [0]
button on the remote control.
To cancel this mode, press [0]
button on the remote control.
(Display 2)
(Display 1)
Version (Decimal)
ROM
Type
Year Develop after
2 sec
Checksum (Hex)
Bluetooth
Version Check
Bluetooth module will need some
time to power up and read the
version display.
Meanwhile [_BT_ll----_] will show
before the ver. numbers appear.
2s display count should start after
flash version number appear.
Bluetooth Check 1. Bluetooth device will start
pairing.
2. Once connected it wll autoplay
for 5 sec and auto disconect.
( 2 sec)
1. Go to Bluetooth selector and
enter Doctor Mode.
1. Go to Bluetooth selector and
enter Doctor Mode.
2. Press USB[O/II] on remote
control.
3. Device will display
SC-MAX250-X,
SC-MAX150-X.
(X = region number)
( 2 sec)
v = flash version (0~7),
w = flash sub version (0~F),
x = control version (0~F),
yyy = EEPROM version (0~255),
zz = EEPROM sub version (0~99),
2. Press [10] [2] [4] and
display will show.