Panasonic RXD-27-E, RXD-27-EB, RXD-27-EG Service manual

TD0404025C2

Portable Stereo CD System

RX-D27E

RX-D27EG

RX-D27EB

Traverse Deck: RAE0240Z-M Mechanism Series

Colour

(S)............Silver Type

SPECIFICATIONS

Specifications

RADIO Frequency Range FM 87.50~108.00 MHz (50

kHz steps)

AM 522~1629 kHz (9 kHz

steps)

TAPE RECORDER Track System 4 track, 2 channel, stereo Monitor system Variable sound monitor Recording system AC bias Erasing system Multi Pole magnet Frequency range Normal position 50 ~ 12000 Hz

CD PLAYER Sampling frequency 44.1 kHz Decoding 16 bit linear Beam source Semiconductor laser

(wavelength 780 nm) No. of channels 2 channel, stereo Wow and flutter Less than possible

measurement data

D/A converter 1 bit DAC

Output Phones : 3.5 mm stereo

(32 Power output (RMS) 2.0W + 2.0W (MAX) Power Requirement AC 230-240 V, 50 Hz Power Consumption 13 W Battery 9 V (six R14/LR14, C, UM-

2 batteries)

Do not use rechargeable type batteries.

Memory back-up 4.5 V (three R6/LR6, AA,

UM-3 batteries)

Do not use rechargeable type batteries. Speakers Full range 8 cm 4 Dimensions (W x H x D) 408 x 163 x 273 mm Mass 3.3 kg without batteries

x 2

)

GENERAL

Jacks

Notes:

1. Specifications are subject to change without notice.

2. Mass and dimensions are approximate.

1. Before Repair and Adjustment

Disconnect AC power, discharge Power Supply Capacitors C116, C216, C317 through a 10

, 5 W resistor to ground. DO NOT SHORT-CIRCUIT DIRECTLY (with a screw driver blade, for instance), as this may destroy solid state devices. After repairs are completed, restore power gradually using a variac, to avoid over current. Current consumption at AC 230 V, 240 V, 50 Hz in NO SIGNAL mode should be ~45 mA respectively.

2. 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.

- 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.

3. Accessories

- AC Main Lead (EB)......1 pc

- AC Main Lead (E/EG)......1 pc

- Remote control transmitter......1 pc

4. Handling Precautions For Traverse Deck

The laser diode in the traverse deck (optical pickup) may break down due to potential difference caused by static electricity of clothes or human body. So, be careful of electrostatic breakdown during repair of the traverse deck (optical pickup).

- Handling of traverse deck (optical pickup)

1. Do not subject the traverse deck (optical pickup) to static electricity as it is extremely sensitive to electrical shock.

2. To prevent the breakdown of the laser diode, an antistatic shorting pin is inserted into the flexible board (FFC board).

3. Take care not to apply excessive stress to the flexible board (FFC board). When removing or connecting the short pin, finish the job in as short time as possible.

4. Do not turn the variable resistor (laser power adjustment). It has already been adjusted.

- Grounding for electrostatic breakdown prevention

1. Human body grounding Use the anti-static wrist strap to discharge the static electricity from your body.

2. Work table grounding. Put a conductive material (sheet) or steel sheet on the area where the traverse deck (optical pickup) is place, and ground the sheet.

Caution:

The static electricity of your clothes will not be grounded through the wrist strap. So, take care not to let your clothes touch the traverse deck (optical pickup).

on when replacing the Traverse Deck

The traverse deck has a short point shorted with solder to protect the laser diode against electrostatics breakdown. Be sure to remove the solder from the short point before making connections.

5. Precaution of Laser Diode

CAUTION:

This product utilizes a laser diode with the unit truned “ON”, invisible laser radiation is emitted from the pick up lens. Wavelength : 780 nm Maximum output radiation power from pick up : 100 Laserradiation 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 enigeschalteten Zustand wird unsichtbare Laserstrahlung von der Lasereinheit abgestrahlt. Wellenlänge : 780nm Maximale Strahlungsleistung der Lasereinheit : 100 DieStrahlung an der Lasereinheit ist ungefährlich, wenn folgende Punkte beachtet werden:

W/VDE

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.

6. Caution for AC Main Lead

1112131415

7. Location of Controls

8. Self-Diagnostic Functions

8.1. Setting of the Self-Diagnostic Mode

1. Switch the SELECTOR to CD and set to TAPE STOP state. (CD PLAY STOP)

2. Press the keys for another two seconds without releasing the the Self-Diagnostic mode.

3. At the state of [ T ] display, operate as follows:

- Open the CD lid and close it right away.

- Start recording TAPE, and STOP it at once.

4. Press

- Self diagnostic results, i.e. the memorized errors during actual operations and the result of above-mentioned operation shall be displayed alternately.

- If there is no error, the aforementioned display [ T ], shall be kept.

- If the operation in the above mentioned in item 4 is made without executing the procedure in item 3, [ H16 ] and [ F69 ] shall be displayed.

/CLEAR for the first two seconds and followed by the FAST FORWARD

/CLEAR key.

8.2. Display Location

/CLEAR key, it shall enter into

8.3. Display Content

No. Abnormal Items Error

Display

1 CLOSE SW abnormal H16 Detect error during closing operation and memorised it

as an error.

2 REST SW abnormal F15

Transmission error between CD servo LSI and micon

4 Low battery detecter U01 Detect the battery when the battery is low.

F26

Under normal operation (Self-Diagnostic Mode inclusive), this error occurs when the REST SW ON is not detected within the specified time (5000 ms) and shall be memorised.

Under normal operation (Self-Diagnostic Mode inclusive), this error occurs when the selection is set to CD and SENSE =’H’ is detected and SENSE =’L’ is not detected within a fail-safe time (20 ms) after system command transmission was sent.

Method of detection

9. Troubleshooting Guide

10. Operation Checks and Component Replacement Procedures

1. This section describes procedures for checking the operation of the major printed circuit boards and replacing the main components.

2. For reassembly after operation checks or replacement, reverse the respective procedures special ressembly procedures are described only when required.

3. Select item from the following index when checks or replacement are required.

Contents

- Disassembly Procedure for each major P.C.B.

1. Replacement of Handle.

2. Replacement of Up Cabinet ,Back Cabinet,Front Cabinet.