Panasonic RXD-45-EB, RXD-45-EG, RXD-50-EB, RXD-50-EG Service manual

PSG1002014CE

Portable Stereo CD System

Model No. RX-D45EB

RX-D45EG RX-D50EB RX-D50EG

Product Color : (W)...White Type (For RX-D45 only)

(S)...Silver Type (For RX-D50 only)

Notes: Please refer to the original service manual for: G CD Mechanism Unit (DLS6F), Order No. PSG1002024AE

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. Caution For Fuse Replacement ------------------------5

1.5. Protection Circuitry ----------------------------------------5

1.6. Safety Part Information ----------------------------------- 5

2 Warning --------------------------------------------------------------7

2.1. Prevention of Electro Static Discharge (ESD) to Electrostatically Sensitive (ES) Devices ----------7

2.2. Precaution of Laser Diode -------------------------------8

2.3. Service caution based on Legal restrictions---------9

2.4. Handling Precaution for Traverse Unit-------------- 10

3 Service Navigation---------------------------------------------- 12

3.1. Service Information --------------------------------------12

4 Specifications ---------------------------------------------------- 13 5 Location of Controls and Components------------------ 15

5.1. Main Unit Key Button Operations (RX-D45)------- 15

5.2. Main Unit and Remote Control Key Button Operations (RX-D50)------------------------------------ 16

5.3. Disc Information ------------------------------------------ 17

6 Self Diagnostic and Doctor Mode Setting -------------- 18

6.1. Self Diagnostic Mode------------------------------------18

6.2. Doctor Mode (For RX-D45) ---------------------------19

6.3. Doctor Mode (For RX-D50) ---------------------------22

7 Service Fixture & Tools ---------------------------------------26 8 Disassembly and Assembly Instructions --------------- 27

8.1. Disassembly flow chart --------------------------------- 28

8.2. Main Parts Location Diagram -------------------------29

8.3. Disassembly of Top Cabinet Assembly------------- 30

8.4. Disassembly of Music Port (For RX-D50 only) --- 31

8.5. Disassembly of Front Panel Assembly -------------31

8.6. Disassembly of Panel P.C.B., Standby P.C.B. and Volume P.C.B. ---------------------------------------32

8.7. Disassembly of Woofer Speaker (SP1)------------- 33

8.8. Disassembly of Woofer Speaker (SP2)------------- 34

8.9. Disassembly of CD Lid---------------------------------- 34

8.10. Disassembly of Deck Mechanism Unit ------------- 35

8.11. Disassembly of Deck P.C.B.--------------------------- 37

8.12. Disassembly of Cassette Lid -------------------------- 37

8.13. Disassembly of Mecha Bottom Cover -------------- 39

8.14. Disassembly of Power P.C.B. ------------------------- 40

8.15. Disassembly of Main P.C.B. --------------------------- 42

8.16. Replacement of Transisor (Q4107)------------------ 43

8.17. Replacement of Power IC (IC4101) ----------------- 45

8.18. Disassembly of CD Mechanism Unit ---------------- 47

8.19. Disassembly of CD Servo P.C.B.--------------------- 47

8.20. Disassembly of Battery (1) P.C.B.-------------------- 48

8.21. Disassembly of Battery (2) P.C.B.-------------------- 49

9 Disassembly and Assembly of Traverse Unit --------- 50

9.1. Disassembling Procedures ---------------------------- 50

9.2. Assembling Procedure---------------------------------- 51

10 Service Position ------------------------------------------------- 53

10.1. Checking & Repairing Deck P.C.B. ------------------ 53

10.2. Checking & Repairing Panel P.C.B. ----------------- 53

10.3. Checking & Repairing Power P.C.B. ---------------- 54

10.4. Checking & Repairing Main P.C.B. ------------------ 54

10.5. Checking & Repairing CD Servo P.C.B. ------------ 56

11 Measurements and Adjustments -------------------------- 57

11.1. Tuner Section --------------------------------------------- 57

11.2. Deck Mechanism Section ------------------------------ 59

12 Voltage Measurement & Waveform Chart--------------- 60

12.1. CD SERVO P.C.B. ---------------------------------------60

12.2. MAIN P.C.B. (1/2) ---------------------------------------- 61

12.3. MAIN P.C.B. (2/2) ---------------------------------------- 62

12.4. DECK P.C.B. ---------------------------------------------- 62

12.5. PANEL P.C.B. --------------------------------------------- 63

12.6. POWER P.C.B. ------------------------------------------- 63

12.7. Waveform Chart ------------------------------------------64

13 Illustration of IC’s, Transistors and Diodes------------ 65 14 Wiring Connection Diagram -------------------------------- 67 15 Schematic Diagram Notes----------------------------------- 69 16 Schematic Diagram -------------------------------------------- 71

16.1. CD SERVO CIRCUIT----------------------------------- 71

16.2. MAIN CIRCUIT (1/6)------------------------------------ 72

16.3. MAIN CIRCUIT (2/6)------------------------------------ 73

16.4. MAIN CIRCUIT (3/6)------------------------------------ 74

16.5. MAIN CIRCUIT (4/6)------------------------------------ 75

16.6. MAIN CIRCUIT (5/6)------------------------------------ 76

16.7. MAIN CIRCUIT (6/6)------------------------------------ 77

16.8. DECK CIRCUIT ------------------------------------------ 78

16.9. PANEL / VOLUME / STANDBY CIRCUIT --------- 79

16.10. POWER CIRCUIT --------------------------------------- 80

16.11. BATTERY (1) / BATTERY (2) / MUSIC PORT CIRCUIT --------------------------------------------------- 81

17 Printed Circuit Board------------------------------------------ 82

17.1. CD SERVO / MUSIC PORT P.C.B. ----------------- 82

17.2. MAIN P.C.B.----------------------------------------------- 83

17.3. DECK / PANEL / VOLUME / STANDBY P.C.B. -- 84

17.4. POWER P.C.B. ------------------------------------------- 85

17.5. POWER / BATTERY (1) / BATTERY (2) P.C.B. -- 86

18 Terminal Function of IC’s ------------------------------------ 87

18.1. IC7001 (MN6627954AMA) IC SERVO PROCESSOR -------------------------------------------- 87

18.2. IC7002 (BA5948FPE2) IC 4CH Drive -------------- 88

18.3. IC2100 (RFKWMD45EG-W) MICRO PROCESSOR -------------------------------------------- 88

19 Exploded View and Replacement Parts List----------- 91

19.1. Exploded View and Mechanical replacement Parts List--------------------------------------------------- 91

19.2. Electrical Replacement Parts List ------------------- 97

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 1MΩ and 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

1.2. Caution for AC Cord

1.3. Before Repair and Adjustment

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 230 V, 50Hz in TUNER VOL. MIN mode should be (~300 mA) respectively.

1.4. Caution For Fuse Replacement

1.4.1. For RX-D45

1.4.2. For RX-D50

1.5. Protection Circuitry

The protection circuitry may have operated if either of the following conditions are noticed:

• No sound is heard when the power is turned on.

• Sound stops during a performance. The function of this circuitry is to prevent circuitry damage if, for example, the positive and negative speaker connection wires are "shorted", or if speaker systems with an impedance less than the indicated rated impedance of the amplifier are used. If this occurs, follow the procedure outlines below:

1. Turn off the power.

2. Determine the cause of the problem and correct it.

3. Turn on the power once again after one minute. Note: When the protection circuitry functions, the unit will not operate unless the power is first turned off and then on again.

1.6. Safety 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 RD-DAPX001-V TRAVERSE UNIT

A2 K2CZ3YY00005 AC CORD D50EB-S,

D45EB-W

A2 K2CQ2CA00007 AC CORD D50EG-S,

D45EG-W A3 RQTX1035-E O/I BOOK (Du/Da/Sw) D50EG-S

A3 RQTX1034-D O/I BOOK (Ge/It/Fr) D50EG-S

A3 RQTX1041-Z O/I BOOK (En/Sp/Po/Cz) D50EG-S

A3 RQTX1148-B O/I BOOK (En) D50EB-S

A3 RQTX1031-D O/I BOOK (Ge/It/Fr) D45EG-W

A3 RQTX1032-E O/I BOOK (Du/Da/Sw) D45EG-W

A3 RQTX1040-Z O/I BOOK (En/Sp/Po/Cz) D45EG-W

A3 RQTX1147-B O/I BOOK (En) D45EB-W

PCB3 REPNT0063A POWER P.C.B. D45EB/EG-W

PCB3 REPNT0063B POWER P.C.B. D50EB/EG-S

T5902 G4C4BAH00003 TRANSFORMER D45EB/EG-W

T5903 G4C4BAH00002 BACK-UP TRANSFORMER D50EB/EG-S

T5904 G4C2AAH00002 TRANSFORMER

F5901 K5D122BLA014 FUSE D45EB/EG-W

Safety Ref. No. Part No. Part Name & Description Remarks

F5901 K5D202BLA013 FUSE D50EB/EG-S

F5902 K5D162BLA013 FUSE

JK5901 K2AA2B000014 JK AC INLET

L5901 ELF15N035AN LINE FILTER

RL5901 K6B1AEA00003 RELAY

Z5902 ERZVA5Z471 ZNR

FP4100 K5G502A00039 FUSE PROTECTOR

FP5903 K5G502A00039 FUSE PROTECTOR

ZA5901 K3GE1ZZ00001 FUSE HOLDER

ZA5902 K3GE1ZZ00001 FUSE HOLDER

ZA5903 K3GE1ZZ00001 FUSE HOLDER

ZA5904 K3GE1ZZ00001 FUSE HOLDER

2 Warning

2.1. Prevention of Electro Static 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. 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 aluminium 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 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) suf-

ficient to damage an ES device).

2.2. Precaution of Laser Diode

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.

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 Lasereinheit abgestrahlt. Wellenlänge : 795 nm (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.

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

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 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%

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 flexible 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.

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

3 Service Navigation

3.1. Service Information

This service manual contains technical information which will allow service personnel’s to understand and service this model. Please place orders using the parts list and not the drawing reference numbers.

If the circuit is changed or modified, this information will be followed by supplement service manual to be filed with original service manual.

• CD Mechanism Unit (DLS6F):

1) This model uses CD Mechanism Unit (DLS6F).

• Micro-processor:

1) The following components are supplied as an assembled part.

• Micro-processor IC, (IC2100) is supplied as assembled part (RFKWMD45EG-W).

4 Specifications

(RX-D45) I Amplifier Section RMS output power stereo mode Front Ch (both channels driven) Total RMS stereo mode power 4 W

I FM/AM Tuner, Terminal Section Preset station FM 16 stations

Frequency Modulation (FM) Frequency range 87.50 MHz to 108.00 MHz (50 kHz

Amplitude Modulation (A M) Frequency range 522 kHz to 1629 kHz (9 kHz step)

Headphone jack Term in al Stereo, 3.5 mm jack (32 Ω)

I Disc Section Disc played (8 cm or 12 cm) CD-Audio, CD-R/W (CD-DA) Sampling frequency 44.1 kHz Decoding 16 bit linear Pick up Wavelength 795 nm (CD) Laser power CLASS 1 (CD) Number of channels 2 channel, stereo Wow and flutter Less than possible measurement

I Cassette Deck Section Track system 4 track, 2 channel Monitor system Variable sound monitor Head Record/playback Solid permalloy head Motor DC servo motor Recording system AC bias 84 kHz Erase system Multi pole magnet Tape speed 4.8 cm/s Overall frequency response (+3 dB, -6 dB) at DECK OUT NORMAL 50 Hz to 12 kHz S/N ratio 50 dB (A weighted) Wow and flutter 0.18% (WRMS) Fast forward and rewind time Approx. 120 seconds with C-60 cas-

2 W per channel (8 Ω), 1 kHz, 10%

THD

AM 16 stations

step)

520 kHz to 1630 kHz (10 kHz step)

data

sette tape

Power consumption in standby mode: 0.8 W (approximate)

Notes :

1. Specifications are subject to change without notices. Mass and dimensions are approximate.

2. Total harmonic distortion is measured by the digital spectrum analyzer.

(RX-D50) I Amplifier Section RMS output power stereo mode Front Ch (both channels driven) Total RMS stereo mode power 6 W

I FM/AM Tuner, Terminal Section Preset station FM 16 stations

Frequency Modulation (FM) Frequency range 87.50 MHz to 108.00 MHz (50 kHz

Amplitude Modulation (AM) Frequency range 522 kHz to 1629 kHz (9 kHz step)

Headphone jack Terminal Stereo, 3.5 mm jack (32 Ω) Music port (front) jack Sensitivity 100 mV, 4.7 kΩ Terminal Stereo, 3.5 mm jack

I Disc 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

Bit rate MP3 32 kbps to 320 kbps Sampling frequency CD 44.1 kHz MP3 32 kHz, 44.1 kHz, 48 kHz Decoding 16 bit linear Pick up Wavelength 795 nm (CD) Laser power CLASS 1 (CD) Number of channels 2 channel, stereo Wow and flutter Less than possible measurement

3 W per channel (4 Ω), 1 kHz, 10%

THD

AM 16 stations

step)

520 kHz to 1630 kHz (10 kHz step)

data

I Speaker Section Ty pe 1 way, 2 speaker system (Bass

reflex)

Speaker(S) Full range 8 cm cone type Impedance 8 Ω

I General Power supply AC 230 V, 50 Hz (EG)

230 V to 240 V, 50 Hz (EB)

Battery 12 V (8 x LR14, C) Memory back-up 6 V (4 x R6/LR6, AA) Power consumption 12 W (EG)

13 W (EB)

Dimensions (W x H x D) 408 mm x 148 mm x 255 mm Mass 3.19 kg without batteries Operating temperature range Operating humidity range 35% to 80 % RH (no condensation)

0°C to +40°C

sette tape

I Speaker Section Type 2 way, 2 speaker system (Bass

reflex)

Speaker(S) Full range 8 cm cone type Tweeter 1.5 cm ceramic tweeter type Impedance 4 Ω

I General Power supply AC 230 V, 50 Hz Battery 12 V (8 x LR14, C) Memory back-up 6 V (4 x R6/LR6, AA) Power consumption 14 W Dimensions (W x H x D) 408 mm x 148 mm x 255 mm Mass 3.28 kg without batteries 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)

Notes :

1. Specifications are subject to change without notices. Mass and dimensions are approximate.

2. Total harmonic distortion is measured by the digital spectrum analyzer.

5 Location of Controls and Components

5.1. Main Unit Key Button Operations (RX-D45)

5.2. Main Unit and Remote Control Key Button Operations (RX-D50)

5.3. Disc Information

5.3.1. Disc Information (RX-D45)

5.3.2. Disc Information (RX-D50)

6 Self Diagnostic and Doctor Mode Setting



This unit is equiped with features of self diagnostic & doctor mode setting for checking the functions & reliability.

6.1. Self Diagnostic Mode

6.1.1. Self Diagnostic Table

Item FL display Key operation

Mode name Description

Self Diagnostic Mode To enter into self diagnostic

checking

1. Select CD mode (Ensure no CD inserted).

㪁㩷㪁㩷㪁㩷䋺㩷㪜㫉㫉㫆㫉㩷㪺㫆㪻㪼

Error code information Error code will display

System will perform a check on any unusual/error code from the memory

Example:

6.1.2. Self Diagnostic Error Code 1 (For CD)

Error Code

H15 CD Open SW

F15 CD REST SW

Diagnostic Contents Description of error

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.

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.

FL display

2. Press and hold [ ] for 2 seconds follow by [ /+] on main unit.

To exit, press [TAPE/OFF] on main uint.

1. In self diagnosis mode.

2. Press [STOP] for on main unit.

To exit, press [TAPE/OFF] on main uint.

Remarks

For CD Mechanism Unit (DLS6F) (For Traverse). Press [ ] on main unit for next error

F26 Communication

between CD servo LSI and micro-p abnormal.

CD function DTMS command, after system setting, If SENSE = 'L' cannot be detected. Memory shall contain F26 code. After Power on, CD function shall continue, error display shall be "NO DISC". Error No. shall be clear by force or cold start.

6.1.3. Self Diagnostic Error Code 2 (For Power Supply)

Error Code

U01 Battery Low Detect the Battery when Battery is

F76 Abnormality in the

Diagnostic Contents Description of error

Low.

output voltage of stabilized power supply

In normal operation when DCDET1 is detected "L" (Low) for two consecutive times, F76 is displayed on FL for 1 second and after that PCONT will be turned to "L" (Low). This is due to any of the DC voltages (+9V, +7V, -7V, +5V, +5.3V etc.) not available.

FL display

For CD Mechanism Unit (DLS6F) (For Traverse). Press [ ] on main unit for next error

Remarks

For Power. Press [ ] on main unit for next error

6.2. Doctor Mode (For RX-D45)

6.2.1. Doctor Mode Table 1

Item FL display Key operation

Mode name Description

Doctor Mode In any mode:

To enter into Doctor Mode for checking of various items and displaying EEPROM and firmware version.

Note: The micro-processor version as shown is an example. It will be revise when there is an updates.

FL Display sequence Display 1 > 2

Version Display

(Display 1)

(DEC)

Checksum : (Condition 1)

Checksum

(HEX)

1. Press and hold [ ] on main unit follow by [-VOL] on main unit.

To exit, press [TAPE/OFF] on main uint.

Version Display

(DEC)

(a) If there is NO EEPROM header string OR (b) If there is no EEPROM ( no data is received by micro-processor) [NO] is displayed.

Checksum : (Condition 2)

If the version of the EEPROM does not match or not working properly [NG] is display.

Checksum : (Condition 3)

If the EEPROM version matches, checksum [YYYY] is displayed.

The Checksum of EEPROM and firmware version will be display for 2 sec.

Check sum

(HEX)

(Display 2)

6.2.2. Doctor Mode Table 2



Item FL display Key operation

Mode name Description

Volume Setting In Doctor Mode:

To check for volume setting during this mode, Bass & treble is set to 0dB & EQ is switch off.

Display for 1 sec

1. Select to FM mode and Press [SOUND EQ] on main unit. To exit, press [TAPE/OFF] on main uint.

CD Loading Test Mode (DLS6F)

CD Combination Test Mode (DLS6F)

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.

A combination of CD loading & traverse unit test.

The counter will increment by one.

When reach 9999999 will change to

0000000

The counter will increment by one.

When reach 9999999 will change to

0000000

In Doctor Mode:

1. Press [-/ ] on main unit. To exit, press [TAPE/OFF] on main uint. (Refer to section 6.2.3. for more information).

In Doctor Mode:

1. Press [ /+] on main unit. To exit, press [TAPE/OFF] on main uint. (Refer to section 6.2.4. for more information).

6.2.3. CD Loading Test Mode

OPEN

Operation

OPEN wait

for 1 s

Operation

wait for 4s

6.2.4. CD Combination Test Mode

First Track

Access

First Track

Play 10 s

Last Track

Access

Count Up

Last Track

Play 10 s

OPEN

Operation

OPEN wait

for 1 s

Operation

Count Up

6.3. Doctor Mode (For RX-D50)

6.3.1. Doctor Mode Table 1

Item FL display Key operation

Mode name Description

Doctor Mode In any mode:

To enter into Doctor Mode for checking of various items and displaying EEPROM and firmware version.

(Display 1)

1. Press and hold [ ] on main unit follow by [4] and [7] on remote control.

Note: The micro-processor version as shown is an example. It will be revise when there is an updates.

FL Display sequence Display 1 > 2

Version Display

(DEC)

Checksum : (Condition 1)

Version Display

(DEC)

(a) If there is NO EEPROM header string OR (b) If there is no EEPROM ( no data is received by micro-processor) [NO] is displayed.

Checksum : (Condition 2)

If the version of the EEPROM does not match or not working properly [NG] is display.

Checksum : (Condition 3)

Checksum

(HEX)

Check sum

(HEX)

To exit, press [TAPE/OFF] on main uint.

If the EEPROM version matches, checksum [YYYY] is displayed.

(Display 2)

The Checksum of EEPROM and firmware version will be display for 2 sec.

6.3.2. Doctor Mode Table 2



Item FL display Key operation

Mode name Description

FL Display Test In Doctor Mode:

To check the FL segments display (All segments will light up)

1. Press [AUTO OFF] on remote control. To cancel, press [0] on remote control. To exit, press [TAPE/OFF] on main uint.

Volume Setting In Doctor Mode:

To check for volume setting during this mode, Bass & treble is set to 0dB & EQ is switch off.

1. Press [7] on remote control. To exit, press [TAPE/OFF] on main uint.

In Doctor Mode:

1. Press [8] on remote control. To exit, press [TAPE/OFF] on main uint.

In Doctor Mode:

1. Press [9] on remote control. To exit, press [TAPE/OFF] on main uint.

CD Loading Test Mode (DLS6F)

CD Traverse Unit Test Mode (DLS6F)

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.

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.

The counter will increment by one.

When reach 9999999 will change to

0000000

The counter will increment by one.

When reach 9999999 will change to

0000000

In Doctor Mode:

1. Press [ 10], [1], [1] on remote control. To exit, press [TAPE/OFF] on main uint. (Refer to section 6.3.3. for more information).

In Doctor Mode:

1. Press [ 10], [1], [2] on remote control. To exit, press [TAPE/OFF] on main uint. (Refer to section 6.3.4. for more information).

CD Combination Test Mode (DLS6F)

CD Self-Adjustment (AJST) Result Display

Cold Start In Doctor Mode:

A combination of CD loading & traverse unit test.

The following shall be displayed for 2.5 secs. The result shall correspond to the condition met as shown.

To activate cold start upon next AC power up.

The counter will increment by one.

When reach 9999999 will change to

0000000

Display of auto adjustment result

In Doctor Mode:

1. Press [ 10], [1], [3] on remote control. To exit, press [TAPE/OFF] on main uint. (Refer to section 6.3.5. for more information).

In Doctor Mode:

1. Press [ 10], [1], [4] on remote control. To exit, press [TAPE/OFF] on main uint.

1. Press [SLEEP] on remote control. To exit, press [TAPE/OFF] on main uint.

6.3.3. CD Loading Test Mode

OPEN

Operation

OPEN wait

for 1 s

6.3.4. CD Traverse Unit Test

Operation

wait for 4s

First Track

Access

First Track

Play 5 s

Last Track

Access

Count Up

Last Track

Play 5 s

Count Up

6.3.5. CD Combination Test Mode

First Track

Access

First Track

Play 10 s

Last Track

Access

Last Track

Play 10 s

Operation

Count Up

OPEN

OPEN wait

for 1 s

Operation

7 Service Fixture & Tools

Prepare service tools before proccess service position.

Service Tools Remarks Deck P.C.B. (JW830) - Main P.C.B. (CN2104) REXN0084 (10P cable) Panel P.C.B. (ZJ903) - Main P.C.B. (CN4104) REXN0082 (4P cable)

Panel P.C.B. (CN900) - Main P.C.B. (CN2105) REXN0080 (10P cable)

8 Disassembly and Assembly Instructions

Caution Note:

• 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 components and P.C.B Locations” as described in the service 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. (See caution as described below)

• During disassembly and assembly, please ensure proper service tools, equipments or jigs is being used.

• During replacement of component parts, please refer to the section of “Replacement Parts List” as described in the service manual.

• Select items from the following indexes when disassembly or replacement are required.

• Disassembly of Top Cabinet Assembly

• Disassembly of Music Port P.C.B. (for RX-D50 only)

• Disassembly of Front Panel Assembly

• Disassembly of Panel P.C.B., Standby P.C.B. and Volume P.C.B.

• Disassembly of Woofer Speaker (SP1)

• Disassembly of Woofer Speaker (SP2)

• Disassembly of CD Lid

• Disassembly of Deck Mechanism Unit

• Disassembly of Deck P.C.B.

• Disassembly of Cassette Lid

• Disassembly of Mecha Bottom Cover

• Disassembly of Power P.C.B.

• Disassembly of Main P.C.B.

• Replacement of Transistor (Q4107)

• Replacement of Power IC (IC4101)

• Disassembly of CD Mechanism Unit

• Disassembly of CD Servo P.C.B.

• Disassembly of Battery (1) P.C.B.

• Disassembly of Battery (2) P.C.B.

8.1. Disassembly flow chart

The following chart is the procedure for disassembling the casing and inside parts for internal inspection when carrying out the servicing. To assemble the unit, reverse the steps shown in the chart below.

8.2. Main Parts Location Diagram

8.3. Disassembly of Top Cabinet Assembly

Step 1 : Upset the unit. Step 2 : Release 2 catches to remove Battery Cover.

Step 3 : Remove 12 screws. Step 4 : Upset the unit.

Step 5 : Slightly lift up the Top Cabinet Assembly as arrow

shown. Step 6 : Detach 10P cable at the connector (CN2104) on Main P.C.B.. Step 7 : Remove the Top Cabinet Assembly.

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