Panasonic SC-HC30EF User manual

© Panasonic Corporation 2010. All rights reserved.
Unauthorized copying and distribution is a violation of
law.
PSG1002012CE
Compact Stereo System
Model No. SC-HC30EF
SC-HC30EG
Product Color: (K)...Black Type
(S)...Silver Type
(P)...Pink Type (SC-HC30EG only)
TABLE OF CONTENTS
PAGE PAGE
1 Safety Precautions----------------------------------------------- 3
1.1. General Guidelines---------------------------------------- 3
1.2. Before Repair and Adjustment ------------------------- 4
1.3. Caution For Fuse Replacement------------------------ 4
1.4. Protection Circuitry ---------------------------------------- 4
1.5. Safety Part Information----------------------------------- 4
2 Warning -------------------------------------------------------------- 5
2.1. Prevention of Electro Static Discharge (ESD)
to Electrostatically Sensitive (ES) Devices---------- 5
2.2. Precaution of Laser Diode------------------------------- 6
2.3. Service caution based on Legal restrictions -------- 7
2.4. Handling Precaution for Traverse Unit --------------- 8
3 Service Navigation ----------------------------------------------- 9
3.1. Service Information --------------------------------------- 9
4 Specifications ----------------------------------------------------10
5 Location of Controls and Components ------------------11
5.1. Main Unit & Remote Control Key Button
Operations ------------------------------------------------- 11
5.2. Connections ----------------------------------------------- 12
5.3. Disc operations ------------------------------------------- 13
5.4. Notes on CD-R and CD-RW -------------------------- 14
5.5. External unit (iPod or iPhone)------------------------- 14
6 Operating Instructions ---------------------------------------- 15
6.1. CD Door Ass’y Jam-------------------------------------- 15
7 Self Diagnostic and Doctor Mode Setting -------------- 17
7.1. Self Diagnostic Mode ----------------------------------- 17
7.2. Self Diagnostic Function Error Code---------------- 18
7.3. Entering Doctor Mode----------------------------------- 19
7.4. Sales Demonstration Lock Function Mode -------- 22
8 Service Fixture & Tools --------------------------------------- 23
9 Disassembly and Assembly Instructions--------------- 24
9.1. Disassembly flow chart --------------------------------- 25
9.2. Types of Screws------------------------------------------ 26

2
9.3. Main Parts Location Diagram ------------------------- 26
9.4. Disassembly of Stand Unit----------------------------- 27
9.5. Replacement of CD Door Ass’y ---------------------- 27
9.6. Disassembly of Net Frame Assembly--------------- 29
9.7. Disassembly of Front Panel Block ------------------- 31
9.8. Disassembly of Top Ornament Unit ----------------- 32
9.9. Disassembly of Button P.C.B. ------------------------- 33
9.10. Disassembly of Passive Radiator (SP5).----------- 33
9.11. Disassembly of Passive Radiator (SP6).----------- 34
9.12. Disassembly of Front Speaker (SP1). -------------- 34
9.13. Disassembly of Front Speaker (SP2). -------------- 36
9.14. Disassembly of Passive Radiator (SP3).----------- 37
9.15. Disassembly of Passive Radiator (SP4).----------- 38
9.16. Disassembly of Traverse Unit. ------------------------ 38
9.17. Disassembly of Traverse Cover & Traverse
Ass’y. -------------------------------------------------------- 39
9.18. Disassembly of CD Servo P.C.B.--------------------- 40
9.19. Disassembly of Headphone/AUX P.C.B. ----------- 40
9.20. Disassembly of PCB Block ---------------------------- 41
9.21. Disassembly of SMPS P.C.B. ------------------------- 43
9.22. Replacement of Switching Regulator IC
(IC5701) ---------------------------------------------------- 44
9.23. Replacement of Voltage Regulator IC
(IC2910) ---------------------------------------------------- 46
9.24. Replacement of Diode (D5802) ---------------------- 47
9.25. Disassembly of Horizontal Main P.C.B. and
Vertical Main P.C.B.-------------------------------------- 48
9.26. Replacement of Power Amplifier IC (IC1)---------- 49
9.27. Disassembly of Tuner P.C.B.-------------------------- 50
9.28. Disassembly of Fan Unit ------------------------------- 51
9.29. Disassembly of Panel P.C.B.-------------------------- 52
9.30. Disassembly of IR P.C.B. and iPod/iPhone
Switch P.C.B. ---------------------------------------------- 53
9.31. Disassembly of Motor P.C.B., Door Switch
P.C.B. and Interlock Switch P.C.B.------------------- 55
9.32. Disassembly of Motor Assembly --------------------- 57
9.33. Disassembly of iPod/iPhone P.C.B. ----------------- 58
10 Service Position ------------------------------------------------- 62
10.1. Checking & Repairing of Panel P.C.B.-------------- 62
10.2. Checking & Repairing of CD Servo P.C.B.--------- 62
10.3. Checking & Repairing of SMPS P.C.B. ------------- 63
10.4. Checking & Repairing of Horizontal Main
P.C.B.-------------------------------------------------------- 65
10.5. Checking & Repairing of Vertical Main P.C.B.
(Side A) ----------------------------------------------------- 66
10.6. Checking & Repairing of Vertical Main P.C.B.
(Side B) ----------------------------------------------------- 68
11 Voltage Measurement & Waveform Chart--------------- 70
11.1. CD SERVO P.C.B. --------------------------------------- 70
11.2. VERTICAL MAIN P.C.B. (1/3)------------------------- 71
11.3. VERTICAL MAIN P.C.B. (2/3)------------------------- 72
11.4. VERTICAL MAIN P.C.B. (3/3)------------------------- 73
11.5. HORIZONTAL MAIN P.C.B. --------------------------- 73
11.6. PANEL P.C.B. --------------------------------------------- 73
11.7. TUNER P.C.B. -------------------------------------------- 74
11.8. SMPS P.C.B. ---------------------------------------------- 74
11.9. Waveform Chart ------------------------------------------ 75
12 Illustration of IC’s, Transistors and Diodes ------------ 76
13 Overall Simplified Block -------------------------------------- 77
14 Block Diagram --------------------------------------------------- 79
14.1. SERVO/SYSTEM CONTROL BLOCK
DIAGRAM ------------------------------------------------- 79
14.2. AUDIO BLOCK DIAGRAM ---------------------------- 80
14.3. POWER SUPPLY(1/2) BLOCK DIAGRAM-------- 81
14.4. POWER SUPPLY(2/2) BLOCK DIAGRAM-------- 82
15 Wiring Connection Diagram -------------------------------- 83
16 Schematic Diagram Notes ----------------------------------- 85
17 Schematic Diagram -------------------------------------------- 87
17.1. CD SERVO CIRCUIT----------------------------------- 87
17.2. MAIN CIRCUIT (1/4)------------------------------------ 88
17.3. MAIN CIRCUIT (2/4)------------------------------------ 89
17.4. MAIN CIRCUIT (3/4)------------------------------------ 90
17.5. MAIN CIRCUIT (4/4)------------------------------------ 91
17.6. HORIZONTAL MAIN CIRCUIT ----------------------- 92
17.7. PANEL / BUTTON CIRCUIT -------------------------- 93
17.8. TUNER / HEADPHONE/AUX / IR / MOTOR
CIRCUIT --------------------------------------------------- 94
17.9. iPod/iPhone / iPod/iPhone SWITCH / DOOR
SWITCH / INTERLOCK SWITCH CIRCUIT ------ 95
17.10. SMPS CIRCUIT ------------------------------------------ 96
18 Printed Circuit Board------------------------------------------ 97
18.1. CD SERVO P.C.B.--------------------------------------- 97
18.2. VERTICAL MAIN P.C.B. ------------------------------- 98
18.3. HORIZONTAL MAIN P.C.B.--------------------------- 99
18.4. PANEL/ BUTTON/ HEADPHONE/AUX/
MOTOR P.C.B. ------------------------------------------100
18.5. TUNER/ IR/ iPod/iPhone/ iPod/iPhone
SWITCH P.C.B. -----------------------------------------101
18.6. DOOR SWITCH/ INTERLOCK SWITCH/
SMPS P.C.B.---------------------------------------------102
19 Terminal Function of IC’s ----------------------------------- 103
19.1. IC801 (RFKWMHC30-K) MICRO
PROCESSOR IC --------------------------------------- 103
19.2. IC7001 (MN6627954AMA) IC SERVO
PROCESSOR -------------------------------------------104
19.3. IC7002 (BA5948FPE2) IC 4CH Drive -------------105
20 Exploded View and Replacement Parts List----------107
20.1. Exploded View and Mechanical replacement
Parts List -------------------------------------------------- 107
20.2. Electrical Replacement Parts List ------------------ 113

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 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. 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

4
1.2. Before Repair and Adjustment
Disconnect AC power, discharge unit AC Capacitors as such C5700, C5701, C5702, C5706, C5708 and C5709 through a 10W, 1W
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 230V, at 50Hz in NO SIGNAL mode (at volume min in FM Tuner mode) should be ~200 mA.
1.3. Caution For Fuse Replacement
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
55 RGPX1011-K REAR CABINET
20 RGNX1043H-K TRAVERSE UNIT ASS'Y
401 RAE0165T-V TRAVERSE UNIT ASS'Y
A2 K2CQ2CA00007 AC CORD
A3 RQTX1068-D O/I BOOK (Ge/It/Fr/Sp/Du/Da/Sw) EG-K/S/P
A3 RQTX1069-H O/I BOOK (Fr) EF-K/S
T1000 G4D1A0000117 SWITCHING TRANSFORMER
T5701 ETS28BH186AC SWITCHING TRANSFORMER
T5751 ETS19AB221AG SWITCHING TRANSFORMER
P5701 K2AA2B000011 AC INLET
C5700 F1BAF1020020 1000pF
C5701 ECQU2A334MLA 0.33uF
C5702 ECQU2A104MLC 0.1uF
C5706 F1BAF1020020 1000pF
C5708 F1BAF1020020 1000pF
C5709 F1BAF1020020 1000pF
C5713 ECQE6103KF 0.01uF
L5701 G0B453G00003 LINE FILTER
F1 K5D162BK0005 FUSE
RY5701 K6B1AEA00003 RELAY
PC5720 B3PBA0000402 PHOTO COUPLER
DZ5701 ERZVA5Z471 ZNR
FP1000 K5H7512A0010 PROTECTOR
TH5701 D4CC11040013 THERMISTOR
TH5702 D4CAC8R00002 THERMISTOR
PCB7 REPX0820EA SMPS P.C.B. (RTL)

5
2 Warning
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).

6
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: 795 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.
ACHTUNG :
Dieses Produkt enthält eine Laserdiode. Im eingeschalteten Zustand wird unsichtbare Laserstrahlung von der Lasereinheitadg-
estrahit.
Wellenlänge : 795nm (CD)
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.
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.

7
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)

8
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.
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 1
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.
2.4.2.2. Human body grounding
1. Use the anti-static wrist strap to discharge the static electricity form your body (Figure 2).
Figure 2

9
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.
•Micro-processor:
1) The following components are supplied as an assembled part.
- Micro-processor IC, (IC801) (RFKWMHC30-K)

10
4 Specifications
IAmplifier Section
RMS Output Power Stereo Mode
Front Ch (both ch driven) 20 W per channel (6 Ω), 1 kHz,
10 % THD
Total RMS Stereo mode power 40 W
Phone jack
Terminal Stereo, 3.5 mm (1/8”) jack
Output level (CD, 1 kHz, -20 dB) max. 0.2 mW +0.2 mW, 32 Ω
Aux (Rear)
Terminal Stereo, 3.5 mm jack
ITuner Section
Preset memory FM 30 stations
AM 15 stations
Frequency Modulation (FM)
Frequency range 87.50 MHz to 108.00 MHz
(50 kHz step)
Antenna terminals 75 Ω(unbalanced)
Amplitude Modulation (AM)
Frequency range 522 kHz to 1629 kHz
(9 kHz step)
520 kHz to 1630 kHz
(10 kHz step)
IDisc Section
Disc played [8 cm or 12 cm]
(1) CD-Audio (CD-DA)
(2) CD-R/RW (CD-DA, MP3)
(3) MP3*
* MPEG-1 Layer 3, MPEG-2 Layer 3
Pick up
Wavelength 795 nm
Laser power CLASS 1
Audio output (Disc)
Number of channels FL, FR, 2 channel
ISpeaker Section
Type 1 way, 1 speaker system
(Passive Radiator)
Speaker unit(s)
Front Speaker 6.5 cm Cone type x 1 / channel
Passive Radiator 8 cm x 2 / channel
Impedance 6 Ω
IGeneral
Power supply AC 220 V to 240 V, 50 Hz
Power consumption 31 W
Dimensions (W x H x D) 500 mm x 201 mm x 102 mm
(D = 69 mm minimum)
Mass (Weight) Approx. 2.8 kg
Operating temperature range 0 °C to +40 °C
Operating humidity range 35% to 80 % RH
(no condensation)
Power consumption in standby mode: 0.09 W (approx)
• Specifications are subject to change without notice.
• Total harmonic distortion is measured by the digital spectrum ana-
lyzer.

11
5 Location of Controls and Components
5.1. Main Unit & Remote Control Key Button Operations

12
5.2. Connections

13
5.3. Disc operations

14
5.4. Notes on CD-R and CD-RW 5.5. External unit (iPod or iPhone)

15
6 Operating Instructions
6.1. CD Door Ass’y Jam
6.1.1. Removing the CD
Step 1 : Insert a flathead screwdriver into the hole behind the
CD Door Ass’y and push the Cam Gear from point A to B.
Step 2 : Gently push the CD Door Ass’y as arrow shown until
the CD is fully in sight.
Step 3 : Remove the CD.

16
6.1.2. Removing the iPod
Step 1 : Insert a flathead screwdriver into the hole behind the
CD Door Ass’y and push the Cam Gear from point B to A.
Step 2 : Gently push the CD Door Ass’y as arrow shown until
the iPod is fully in sight.
Step 3 : Remove the iPod.

17
7 Self Diagnostic and Doctor Mode Setting
This unit is equipped with features of self diagnostic & doctor mode setting for checking the functions & reliability.
7.1. Self Diagnostic Mode
Here is the procedures to enter into Self Diagnostic Mode.
Step 1 : Turn on the unit, and then press and hold [I] button for 2 seconds follow by [ ] on the unit.
Step 2 : The display show as follow.
To exit the Self Diagnostic Mode
Use either one of the following methods to cancel the Self Diagnostic Mode.
• Press the power button on the main unit.
• Unplug the AC cord.
7.1.1. Self Diagnostic Table
Self Diagnostic Mode To enter into self diagnostic
checking
1. Select CD mode
(Ensure no CD inserted).
2. Press and hold [ ] for
2 seconds follow by [ ] on
main unit.
Item FL display Key operation
Mode name Description
Error code information
Delete Error code
Example:
System will perform a check on
any unusual/error code from the
memory
To clear the stored in memory
(EEPROM IC)
1. In self diagnostic mode,
Press [STOP] on main unit.
To exit, press [TA] on main uint
or remote control.
1. In self diagnostic mode,
Press [0] on remote control.
To exit, press [TA] on main uint
or remote control.

18
7.2. Self Diagnostic Function Error Code
7.2.1. CD Mechanism Error Code Table
7.2.2. iPod Error Code Table
7.2.3. Power Amp Error Code Table
Error Code Diagnostic Contents Descriptionof error Automatic FL Display Remarks
CD H15 CD Open Abnormal During operation
POS_SW_R On fail to be
detected with 3 sec. Error
No. shall be clear by force
or during cold start.
Press [ ] on main unit for
next error.
CD H16 CD Closing Abnormal During operation
POS_SW_CEN On fail to
be detected with 3 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 (10 s) 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.
During switch to CD func-
tion, if SENSE = “L” within
failsafe time of 20ms.
Press [ ] on main unit for
next error.
Error Code Diagnostic Contents Descriptionof error Automatic FL Display Remarks
IPD H15 iPod Open Abnormal During operation
POS_SW_L On fail to be
detected with 3 sec. Error
No. shall be clear by force
or during cold start.
Press [ ] on main unit for
next error.
IPD H16 iPod Closing Abnormal During operation
POS_SW_CEN On fail to
be detected with 3 sec.
Error No. shall be clear by
force or during cold start.
Press [ ] on main unit for
next error.
Error Code Diagnostic Contents Descriptionof error Automatic FL Display Remarks
F61/F76 Power Amp IC output
abnormal
During power-on, PDET1,
PDET2 & MAINV_DET /
TEMP_DET is “L” after 1
sec.
Press [ ] on main unit for
next error.

19
7.3. Entering Doctor Mode
Here is the procedures to enter into Doctor Mode.
Step 1 : Turn on the unit, and then pressing and holding [I] on main unit in order while press [4] and [7] on the remote control.
Step 2 : The display show as follow.
To exit the Doctor mode
Use either one of the following methods to cancel the Doctor mode.
• Press the power button of the unit.
• Unlug the AC cord.
7.3.1. 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 fol-
low by [4] and [7] on remote con-
trol.
To exit Doctor Mode, press but-
ton on main unit or remote control.

20
7.3.2. 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 [1] button on remote con-
trol.
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.
Mecha Sliding Panel
Reliability
To check the operation of
sliding Panel.
Sequence as follow :
1. Panel set to close
position.
2. CD Open & stop at left
position for 1s.
3. CD Close & stop at
centre position for 1s.
In Doctor Mode:
1. Press [ ] follow by [2] & then
[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.
CD Traverse Unit Test
Mode
To check for the traverse unit
operation. In this mode, the
first & last track is access &
read. (TOC). It fails when
TOC is not completed 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.
(For more information,
please refer to Section 7.3.4.)
CD Auto Adjustment
Display
To display result of self
adjustment for CD.
The [NO DISC] display will appear after 3s,
In Doctor Mode:
1. Press [ ], [1], [4] 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.