Panasonic SA-PM24EB User manual

© Panasonic Corporation 2010. All rights reserved.
Unauthorized copying and distribution is a violation of
law.
PSG1002018CE
CD Stereo System
Model No. SA-PM24EB
SA-PM24EG
SA-PM24EP
Product Color: (K)...Black Type
TABLE OF CONTENTS PAGE PAGE
1 Safety Precautions----------------------------------------------- 3
1.1. General Guidelines---------------------------------------- 3
1.2. Caution for AC Cord -------------------------------------- 4
1.3. Before Repair and Adjustment------------------------- 5
1.4. Protection Circuitry---------------------------------------- 5
1.5. Safety Part Information----------------------------------- 5
2 Warning-------------------------------------------------------------- 6
2.1. Prevention of Electro Static 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 Precaution 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 Operations-------------------- 13
5.2. Remote Control Key Button Operations------------ 14
Notes: Please refer to the Original Service Manual for :
OCD Mechanism Unit (DLS6C), Order No. MD0803034CE
OSpeaker system SB-PM24EG-K/M, Order No. PSG1002025CE

2
5.3. Media Information----------------------------------------15
6 Self-diagnostic and special mode setting --------------16
6.1. Entering into Self-diagnostic Mode ------------------16
6.2. Self-diagnostic Function Error Code ----------------16
6.3. Entering into Doctor Mode-----------------------------17
7 Troubleshooting Guide----------------------------------------21
8 Service Fixture & Tools ---------------------------------------23
9 Disassembly and Assembly Instructions---------------24
9.1. Disassembly flow chart ---------------------------------25
9.2. Main Parts Location Diagram -------------------------26
9.3. Disassembly of Top Cabinet Assembly-------------27
9.4. Disassembly of Headphone P.C.B.------------------28
9.5. Disassembly of Front Panel Assembly -------------29
9.6. Disassembly of USB P.C.B. ---------------------------30
9.7. Disassembly of Panel P.C.B.--------------------------31
9.8. Disassembly of FL Window----------------------------33
9.9. Disassembly of Centre Ornament -------------------34
9.10. Disassembly of CD Lid----------------------------------34
9.11. Disassembly of Main P.C.B.---------------------------36
9.12. Disassembly of Power P.C.B.-------------------------38
9.13. Replacement of Power Amp IC (IC5101)----------39
9.14. Disassembly of Transformer P.C.B. -----------------41
9.15. Replacement of Transistor (Q5901)-----------------43
9.16. Disassembly of CD Mechanism Unit (DLS6C) ---45
9.17. Disassembly of CD Servo P.C.B.---------------------46
10 Disassembly and Assembly of Traverse Unit ---------48
10.1. Disassembling Procedures ----------------------------48
10.2. Assembling Procedures --------------------------------49
11 Service Position -------------------------------------------------51
11.1. Checking and Repairing of USB P.C.B. ------------51
11.2. Checking and Repairing of Panel P.C.B.-----------52
11.3. Checking and Repairing of Transformer
P.C.B.--------------------------------------------------------53
11.4. Checking and Repairing of Main P.C.B.------------54
11.5. Checking and Repairing of Power P.C.B.----------55
11.6. Checking and Repairing of CD Servo P.C.B.------55
12 Voltage Measurement & Waveform Chart---------------57
12.1. CD SERVO P.C.B. ---------------------------------------57
12.2. MAIN P.C.B. (1/2) ----------------------------------------58
12.3. MAIN P.C.B. (2/2) ----------------------------------------59
12.4. PANEL P.C.B.---------------------------------------------59
12.5. POWER P.C.B. -------------------------------------------59
12.6. TRANSFORMER P.C.B.--------------------------------60
12.7. USB P.C.B.-------------------------------------------------60
12.8. Waveform Chart ------------------------------------------61
13 Illustration of IC’s, Transistors and Diodes ------------62
14 Overall Simplified Block--------------------------------------63
14.1. Control Signal Diagram---------------------------------63
14.2. Block Connection Diagram ----------------------------64
15 Block Diagram ---------------------------------------------------65
15.1. SERVO/SYSTEM CONTROL BLOCK
DIAGRAM--------------------------------------------------65
15.2. AUDIO BLOCK DIAGRAM ----------------------------66
15.3. POWER SUPPLY BLOCK DIAGRAM --------------67
16 Wiring Connection Diagram---------------------------------69
17 Schematic Diagram Notes -----------------------------------71
18 Schematic Diagram---------------------------------------------73
18.1. CD SERVO CIRCUIT -----------------------------------73
18.2. MAIN CIRCUIT (1/4) ------------------------------------74
18.3. MAIN CIRCUIT (2/4) ------------------------------------75
18.4. MAIN CIRCUIT (3/4) ------------------------------------76
18.5. MAIN CIRCUIT (4/4)------------------------------------ 77
18.6. PANEL CIRCUIT----------------------------------------- 78
18.7. USB CIRCUIT -------------------------------------------- 79
18.8. TRANSFORMER CIRCUIT --------------------------- 80
18.9. POWER CIRCUIT / HEADPHONE CIRCUIT ---- 81
19 Printed Circuit Board------------------------------------------ 83
19.1. CD SERVO P.C.B. / PANEL P.C.B. ----------------- 83
19.2. MAIN P.C.B. / USB P.C.B.----------------------------- 84
19.3. HEADPHONE P.C.B. / POWER P.C.B. /
TRANSFORMER P.C.B.------------------------------- 85
20 Terminal Function of IC’s ------------------------------------ 87
20.1. IC800 (RFKWMPM5EB) MICRO
PROCESSOR -------------------------------------------- 87
21 Exploded View and Replacement Parts List----------- 89
21.1. Exploded View and Mechanical Replacement
Parts List--------------------------------------------------- 89
21.2. Electrical Replacement Parts List ------------------- 93

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 for leakage current checks to prevent the customer from being exposed to shock haz-
ards.
1.1.1. Leakage Current Cold Check
1. Unplug the AC cord and connect a jumper between the two prongs on the plug.
2. Using an ohmmeter measure the resistance value, 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 chas-
sis, 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. should the measurement is outside of
the limits specified, there is a possibility of a shock hazard, and the equipment should be repaired and re-checked before it is
returned to the customer.
Fig. 1

4
1.2. Caution for AC Cord

5
1.3. Before Repair and Adjustment
Disconnect AC power, discharge Power Supply Capacitors C5901, C900, C909, C5909, C5917 & C5121 through a 10Ω, 1W resis-
tor to ground.
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 220-240 V, 50 Hz in NO SIGNAL mode should be ~250 mA.
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. Safety Part 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. Table 1
Safety Ref. No. Part No. Part Name & Description Remarks
401 RAEX0190Z-V TRAVERSE UNIT
22 RFKHAPM24EBK REAR CABINET ASS’Y EB
22 RFKHAPM24EGK REAR CABINET ASS’Y EG
22 RFKHAPM24EPK REAR CABINET ASS’Y EP
PCB1 REPX0709AA TRANSFORMER P.C.B. (RTL)
T5901 G4CYAYY00213 MAIN TRANSFORMER
T5902 G4C2AAJ00005 BACK-UP TRANSFORMER
Z5901 ERZVA5Z471 ZNR
RL5901 K6B1AEA00003 RELAY
F5901 K5D102BLA013 FUSE
FP5901 K5G502AA0002 FUSE PROTECTOR
JK5901 K2AA2B000011 AC INLET
L5901 ELF15N035AN LINE FILTER
A2 K2CZ3YY00005 AC CORD EB
A2 K2CQ2CA00007 AC CORD EG/EP
A3 RQTX0179-2D O/I BOOK (Ge/Fr/It/Sp) EG
A3 RQTX0180-2H O/I BOOK (Da/Du/Sw) EG
A3 RQTX0181-2E O/I BOOK (Sp) EP
A3 RQTX0182-2B O/I BOOK (En) EP
A3 RQTX0183-2R O/I BOOK (Ru/Ur) EP
A3 RQTX0262-2B O/I BOOK (En) EB

6
2Warning
2.1. Prevention of Electro Static 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. 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-equiped 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 equiped with ES devices, place the assembly on a conductive surface such as alumin-
ium foil, to prevent electrostatic charge build up 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 remover 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, aluminium 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 pick up lens.
Wavelength : 785nm
Maximum output radiation power from pick up : 100 μW/VDE
Laser radiation from pick up unit is safety level, but be sure the followings:
1. Do not disassemble the optical pick up unit, since radiation from exposed laser diode is dangerous.
2. Do not adjust the variable resistor on the pick up unit. It was already adjusted.
3. Do not look at the focus lens using optical instruments.
4. Recommend not to look at pick up lens for a long time.
ACHTUNG :
Dieses Produkt enthält eine Laserdiode. Im eingeschalteten Zustand wird unsichtbare Laserstrahlung von der Lasereinheit
abgestrahlt.
Wellenlänge : 785nm
Maximale Strahlungsleistung der Lasereinheit :100 μW/VDE
Die Strahlung an der Lasereinheit ist ungefährlich, wenn folgende Punkte beachtet werden:
1. Die Lasereinheit nicht zerlegen, da die Strahlung an der freigelegten Laserdiode gefährlich ist.
2. Den werkseitig justierten Einstellregler der Lasereinhit nicht verstellen.
3. Nicht mit optischen Instrumenten in die Fokussierlinse blicken.
4. Nicht über längere Zeit in die Fokussierlinse blicken.
ADVARSEL :
I dette a apparat anvendes laser.
QUse of Caution Labels
CAUTION!
THIS PRODUCT UTILIZES A LASER.
USE OF CONTROLS OR ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE SPECIFIED HEREIN MAY RESULT
IN HAZARDOUS RADIATION EXPOSURE.

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 Precaution 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. (Figure 1)
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 CD player use the optical pickup (laser diode) and the optical pickup will be damaged by static electricity
in the working environment. Proceed servicing works under the working environment where grounding works is completed.
2.4.2.1. Worktable grounding
1. Put a conductive material (sheet) or iron sheet on the area where the optical pickup is placed, and ground the sheet. (Figure
2)

10
2.4.2.2. Human body grounding
1. Use the anti-static wrist strap to discharge the static electricity form your body. (Figure 2)

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 filled with original service
manual.
•CD Mechanism Unit :
1. This model uses CD Mechanism Unit (DLS6C).
•Micro-processor :
1. The following components are supplied as an assembled part.
• Micro-processor IC, IC800 is supplied as assembled part, RFKWMPM5EB.

12
4 Specifications
QAmplifier Section
RMS Output Power Stereo Mode
Front Ch (both ch driven) 10 W per channel (4 Ω), 1 kHz, 10% THD
Total RMS Stereo mode power 20 W
QFM/AM Tuner, Terminals Section
Preset memory FM 30 stations
AM 15 stations
Frequency Modulation (FM)
Frequency range 87.50 to 108.00 MHz (50 kHz step)
Antenna terminals 75 Ω(unbalanced)
Amplitude Modulation (AM)
Frequency range 522 to 1629 kHz (9 kHz step)
Music Port (front) jack
Sensitivity 100 mV, 4.7 kΩ
Terminal Stereo, 3.5 mm jack
Headphone jack
Terminal Stereo, 3.5 mm jack
QDisc Section
Disc 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, MPEG-2 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
Media file format support MP3 (*.mp3)
USB device file system FAT 12 / FAT 16 / FAT 32
USB port power 500 mA (max)
QGeneral
Power supply AC 220 to 240 V, 50 Hz
Power consumption 42 W
Dimensions (W x H x D) 153 mm x 226 mm x 300 mm
Mass 2.1 kg
Operating temperature range 0°C to +40°C
Operating humidity range 35% to 80% RH (no condensation)
Power consumption in
standby mode 0.8 W (approximate)
Note:
1. Specifications are subject to change without notice. Mass and
dimensions are approximate.
2. Total harmonic distortion is measured by the digital spectrum ana-
lyzer.
QSystem : SC-PM24EB-K Music center: SA-PM24EB-K
Speaker: SB-PM24EG-K
QSystem : SC-PM24EG-K Music center: SA-PM24EG-K
Speaker: SB-PM24EG-K
QSystem : SC-PM24EP-M Music center: SA-PM24EP-K
Speaker: SB-PM24EG-M
QSystem : SC-PM24EP-K Music center: SA-PM24EP-K
Speaker: SB-PM24EG-M

13
5 Location of Controls and Components
5.1. Main Unit Key Button Operations

14
5.2. Remote Control Key Button Operations

15
5.3. Media Information

16
6 Self-diagnostic and special mode setting
This unit is equipped with features of self-diagnostic & special mode setting for checking the functions & reliability.
6.1. Entering into Self-diagnostic Mode
Here is the procedure to enter into self-diagnostic mode:
Step 1 : Select [ ] for CD mode (Ensure no CD is inserted)
Step 2 : Press the [ ] key of the main set for more than 2 seconds. While pressing this key, press the [ ] key on the
main set for another 2 seconds to enter into the Self-diagnostic mode. The FL shall display :-
To exit the Self-diagnostic mode
Press button on main unit or remote control.
6.2. Self-diagnostic Function Error Code
Self-diagnostic Function provides information on any problems occuring for the unit and its respective components by displaying
error codes. Thesed 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.
6.2.1. CD Mechanism Error Code Table
6.2.2. Power Supply Error Code Table
Error Code Diagnosis Contents Description of error Automatic FL Display Remarks
H15 CD Open SW Abnormal During normal operation
CD OPEN SW 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.
F15 CD REST SW Abnormal CD traverse position intial
setting operation failsafe
counter (1000 ms) waiting
for REST SW to turn on.
Error No. shall be clear by
force or during cold start.
Press [ ] on main
unit for next error.
F26 Communication between
CD servo LSI and micro-p
abnormal.
CD function DTMS com-
mand, after system set-
ting, If SENSE = 'L' cannot
be detected. Memory shall
contain F26 code. After
Power on, CD function
shall continue, error dis-
play s ha ll be "NO D IS C" .
Error No. shall be clear by
force or cold start.
Press [ ] on main
unit for next error.
Error Code Diagnosis Contents Description of error Automatic FL Display Remarks
F76 Power Amp IC output
abnormal DCDET1 = L (NG) Press [ ] on main
unit for next error.

17
6.3. Entering into Doctor Mode
Here is the procedure to enter into doctor mode :
Press [ ] button on main unit follow by [4] and [7] on remote control. The FL shall display :-
To exit the Doctor mode
Press button on main unit or remote control.
6.3.1. Doctor Mode Table 1
Item FL Display Key Operation
Mode Name Description Front Key
Doctor Mode To enter into Doctor Mode
for checking of various
items and displaying
EEPROM and firmware ver-
sion.
Note: The micro-processor
version as shown is an
example. It will be revise
when there is an updates.
FL Display sequence Dis-
play 1 →2
(Display 1)
Checksum : (Condition 1)
(a) If there is NO EEPROM header string
OR
(b) If there is no EEPROM ( no data is
received by micro-processor) [NO] is dis-
played.
Checksum : (Condition 2)
If the version of the EEPROM does not
match or not working properly [NG] is dis-
play.
Checksum : (Condition 3)
If the EEPROM version matches, checksum
[YYYY] is displayed.
(Display 2)
The Checksum of EEPROM and firmware
version will be display for 2 sec.
In CD mode:
1. Press [ ] button on main
unit follow by [4] and [7] on
remote control.
To exit Doctor Mode, press but-
ton on main unit or remote control.

18
6.3.2. Doctor Mode Table 2
Item FL Display Key Operation
Mode Name Description Front Key
FL Display Test To check the FL segments
display (All segments will
light up)
In Doctor Mode:
1. Press [DIMMER] button on
remote control.
To cancel, press [0] button on remote
control.
To exit Doctor Mode, press but-
ton on main unit or remote control.
Volume Setting To check for volume setting
during this mode, Bass &
treble is set to 0dB & EQ is
switch off.
In Doctor Mode:
1. Press [7] button on remote control.
To exit Doctor Mode, press but-
ton on main unit or remote control.
In Doctor Mode:
2. Press [8] button on remote control.
To exit Doctor Mode, press but-
ton on main unit or remote control.
In Doctor Mode:
3. Press [9] button on remote control.
To exit Doctor Mode, press but-
ton on main unit or remote control.
CD Loading Test
(DLS6C) To determine the reliability of CD Loading unit.
To check for the Open/Close
operation for the CD loading
unit. It fails when there is
abnormality in opening or
closing.
In Doctor Mode:
1. Press [ ], [1], [1] button on
remote control.
To cancel, press [0] button on remote
control.
To exit Doctor Mode, press but-
ton on main unit or remote control.
(Refer to section 6.3.3 for more infor-
mation)
CD Traverse Test
(DLS6C) To check for the traverse unit operation. In this mode, the
first & last track is access &
read. (TOC). It fails when
TOC is notcompleted by IOS
or the traverse is out of
focus.
In Doctor Mode:
1. Press [ ], [1], [2] button on
remote control.
To cancel, press [0] button on remote
control.
To exit Doctor Mode, press but-
ton on main unit or remote control.
(Refer to section 6.3.4 for more infor-
mation)
CD Combination Test
(DLS6C) A combination of CD loading & traverse unit test. In Doctor Mode:
1. Press [ ], [1], [3] button on
remote control.
To cancel, press [0] button on remote
control.
To exit Doctor Mode, press but-
ton on main unit or remote control.
(Refer to section 6.3.5 for more infor-
mation)
Cold Start To activate cold start upon
next AC power up. It will set
to factory shipment condi-
tion.
In Doctor Mode:
1. Press [SLEEP] button on remote
control.
To exit Doctor Mode, press but-
ton on main unit or remote control.

19
6.3.3. DLS6 Loading Test
6.3.4. DLS6 Traverse Test
OPEN
Operation
OPEN wait
for 1 s
CLOSE
Operation
CLOSE
wait for 4s
Count Up
First Track
Access
Last Track
Access
First Track
Play 5 s
Last Track
Play 5 s Count Up

20
6.3.5. DLS6 Combination Test
First Track
Access
Last Track
Access
First Track
Play 10 s
Last Track
Play 10 s
OPEN
Operation
OPEN wait
for 1 s
CLOSE
Operation
Count Up