Panasonic RX-ES23E, RX-ES23EG Service Manual
A
A
Portable Stereo CD System
RX-ES23E
RX-ES23EG
Colour
(S)..........Silver Type
Order No. MD0411555C2
Specification
n RADIO
Frequency range
FM 87.50-108.00 MHz (50 kHz steps)
M 522-1629 kHz (9 kHz steps)
n 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 Below measurable limit
D / A converter MASH (1 bit DAC)
n TAPE RECORDER
Track system Stereo
Monitor system Variable sound monitor
Recording system AC bias
Erasing system Multi Pole magnet
Frequency range
Normal position 50-14000 Hz
n GENERAL
Speakers 8cm2.7Ω x2
Jacks
Output Phones: 3.5 mm stereo (16-32 Ω )
Power requirement
C 230-240 V, 50 Hz
Power consumption 23 W
Battery 12 V [Eight R20 / LR20 (D, UM-1)
batteries]
l Do not use rechargeable type batteries
Memory backup for computer /
clock
l Do not use rechargeable type batteries
Dimensions 529 mm (W) x 144 mm (H) x 276
Mass 3.9 kg without batteries
Power consumption in standby
mode
Notes:
1. Specifications are subject to change without notice.
2. Mass and dimensions are approximate.
6 V [Four R6 / LR6 (AA, UM-3)
batteries]
mm (D)
2.3 W
© 2004 Matsushita Electric Industrial Co. Ltd.. All
rights reserved. Unauthorized copying and
distribution is a violation of law.
RX-ES23E / RX-ES23 EG
CONTENTS
Page Page
1 Safety Precautions 3
1.1. GENERAL GUIDELINES
2 Before Repair and Adjustment
3 Protection Circuitry
4 Handling the Lead Solder
4.1. About lead free solder (PbF)
5 Precaution of Laser Diode
6 Handling Precautions For Traverse Deck
7 Accessories
8 Operation Procedures
8.1. Main Unit
8.2. Remote Control
9 Information on MP3
10 Disassembly and Main Component Replacement Procedures
and Operational Check
10.1. Disassembly flow chart
10.2. Checking Procedure for each major P.C.B.
10.3. Procedures for Replacing Pinch Roller and Head Block
(Deck Mechanism Unit)
10.4. Procedures for Replacing Motor, Capstan Belt A, Capstan
Belt B, and Winding Belt (Deck Mechanism Unit)
10.5. Procedures for Replacing Parts on Deck Mechanism PCB
10.6. Procedures of Replacing Traverse Base (Unit), Driving
Gear, and Cam Gear (CD Mechanism Unit)
10.7. Procedures for Replacing Optical Pickup (CD Mechanism
Unit)
10.8. Procedures for Replacement Traverse Gear A and
Traverse Gear B (CD Mechanism Unit)
11 Procedure for checking of the major P.C.B.
11.1. Checking the Main P.C.B., Panel P.C.B., Deck Mechanism
P.C.B., CD Servo P.C.B., Battery P.C.B., Sensor P.C.B.,
Power and Standby LED P.C.B.
12 Self Diagnostic Function
12.1. Self-diagnosis Function
12.2. Setting of doctor mode
13 Measurements and Adjustments
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13.1. Tuner Section
13.2. Deck Section
14 Voltage Measurement
14.1. Main P.C.B.
14.2. CD Servo P.C.B.
15 Waveform Chart
16 Notes of Schematic Diagram
17 Schematic Diagram
17.1. CD SERVO CIRCUIT
17.2. MAIN CIRCUIT
17.3. MAIN (TUNER) CIRCUIT
17.4. MAIN (DECK) CIRCUIT and DECK MECHANISM
CIRCUIT
17.5. PANEL CIRCUIT, STANDBY LED CIRCUIT, BATTERY
CIRCUIT, SENSOR CIRCUIT and POWER CIRCUIT
18 Printed Circuit Board
18.1. CD SERVO P.C.B
18.2. MAIN P.C.B.
18.3. PANEL P.C.B. and DECK MECHANISM P.C.B.
18.4. STANDBY LED P.C.B., BATTERY P.C.B. and SENSOR
P.C.B.
18.5. POWER P.C.B.
19 Wiring Connection Diagram
20 Type Illustration of IC ’ s, Transistors and Diodes
21 Terminal Function Of IC ’ s
21.1. IC801 (MN101C74GAA1): Microprocessor
22 Troubleshooting Flowchart (CD Section Circuit)
23 Parts Location and Replacement Parts List
23.1. Deck Mechanism (RAA4401-1V)
23.2. CD Loading Mechanism
23.3. Cabinet Part List
23.4. Electrical Part List
23.5. Packaging Materials & Accessories Parts List
23.6. Packaging
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RX-ES23E / RX-ES23 EG
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, ensure that all the protective devices such as insulation barriers, insulation papers shields are properly installed.
3. After servicing, check for leakage current checks to prevent 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. 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 5.2Ω.
When the exposed metal does not have a return path to the chassis, the reading must be
.
Fig. 1
1.1.2. LEAKAGE CURRENT HOT CHECK (See Figure 1.)
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
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 expose d 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 outsideof 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.
0.15µF capacitors, between each exposed metallic part on the set and a
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RX-ES23E / RX-ES23 EG
2 Before Repair and Adjustment
Disconnect AC power, discharge Power Supply Capacitors C301, C131, C231, C310, C307, C309 and C331 through a 10 Ω,1W
resistor to ground. DO NOT SHORT-CIRCUIT DIRECTLY (with a screw driver blade, for instance), as this may destroy solidstate
devices.
After repairs are completed, restore power gradually using a variac, to avoid overcurrent.
Current consum ption at AC 220 V, 50 Hz in NO SIGNAL mode should be ~180 mA respectively.
Current consum ption at AC 240 V, 60 Hz in NO SIGNAL mode should be ~129 mA respectively.
3 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 connec tion wires are
“shorted”, or if speaker systems with an impedance less than the indicated rated impedance ofthe amplifier are used.
If this occurs, follow the procedure outline s 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.
4 Handling the Lead Solder
4.1. About lead free solder (PbF)
Distinction of PbF P.C.B. :
P.C.B.s (manufactured) using lead free solder will have a PbF stamp on the P.C.B.
Caution:
· Pb free solder has a higher melting point than standard solder; Typically the melting point is 50 - 70°F (30 - 40°C) higher.
Please use a high temperature soldering iron. In case of the soldering iron with temperaturecontrol, please set it to 700 ± 20°F
(370 ± 10°C).
· Pb free solder will tend to splash when heated too high (about 1100°F/600°C).
· W hen soldering or unsoldering, please completely remove all of the solder on the pins or solder area, and be sure to heat the
soldering points with the Pb free solder until it melts enough.
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RX-ES23E / RX-ES23 EG
5 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 : 780 nm
Maximum output radiation power from pick up : 100 µW/VDE
Laser radiation frompick 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 : 780nm
Maximale Strahlungsleistung der Lasereinheit :100µW/VDE
DieStrahlung 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.
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.
n Use of Caution Labels
5
RX-ES23E / RX-ES23 EG
6 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).
l Handling of CD 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. The short land between the No.4 (LD) and No.5 (GND)
pins on the flexible board (FFC) is shorted with a solder
build-up to prevent damage to the laser diode.
3. Take care not to apply excessive stress to the flexible
board (FPC board) (Fig 6.1).
4. Do not turn the variable resistor (laser power
adjustment). It has already been adjusted.
Fig 6.1
l Grounding for electrostatic breakdown prevention
1. Human body grounding (Fig 6.2)
Use the anti-static wrist strap to discharge the static
electricity from your body.
2. Work table grounding (Fig 6.2)
Put a conductive material (sheet) or steel sheet on the
area where the traverse deck (optical pickup) is placed,
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).
Fig 6.2
Caution when Replacing the Optical Pickup :
The traverse 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.
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7 Accessories
Note : Refer to Packing Materials & Accessories Parts List (Section 23.5) for the part number.
Remote Control.....1pc
AC cord.....1 pc
RX-ES23E / RX-ES23 EG
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RX-ES23E / RX-ES23 EG
8 Operation Procedures
8.1. Main Unit
8
8.2. Remote Control
RX-ES23E / RX-ES23 EG
9
RX-ES23E / RX-ES23 EG
9 Information on MP3
10
RX-ES23E / RX-ES23 EG
10 Disassembly and Main Component Replacement
Procedures and Operational Check
“ATTENTION SERVICER”
Some chassis components may be have sharp edges. Be careful when disassembly and servicing.
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 reassembly procedures are described only when required.
3. Select items from the following index when checks or replacement are required.
Warning:
This product uses a laser diode. Refer to “Precaution of Laser Diode”.
ACHTUNG:
Die Lasereinheit nicht zerlegen.
Die Lasereinheit darf nur gegen eine vom Hertsteller spezifizierte Einheit ausgetauscht werden.
10.1. Disassembly flow chart
The following chart is the procedure for disassembling the unit and inside parts for internal inspection when carrying out the
servicing.
To assemble the unit, reverse the steps shown in the chart below.
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RX-ES23E / RX-ES23 EG
10.2. Checking Procedure for each major P.C.B.
10.2.1. Disassembly of Top Cabinet Unit.
Step 3: Flip up the handle as arrow direction shown.
Step 1: Remove 10 screws.
Step 2: Remove 2 screws.
Step 4: Use a screw driver and insert into the hole. Slide the
screw driver to the direction shown to open the cassette panel.
Note: Be careful not to exert strong force as it may cause
damage to the chassis.
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Step 5: Cassette panel will automatically open.
RX-ES23E / RX-ES23 EG
Step 8: Flip the Top Cabinet over as arrow shown.
Step 9: Detac h the FFC wire (CP401).
Step 6: Remove 2 screws.
10.2.2. Disassembly of Panel P.C.B.
Follow (step 1) to (step 9) of item 10.2.1.
Step 7: Lift up the Top Cabinet as arrow shown.
Step 1: Lift the upper section of the front panel slightly towards
you as arrow shown.
Step 2: While lifting, push the lower section of the front panel
in the direction shown by the arrow to release the catches.
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RX-ES23E / RX-ES23 EG
Step 3: Remove the Front Panel from Top Cabinet as arrow
shown.
Step 5: Release 2 catches.
Step 6: Flip over the Control Button Unit with the Panel P.C.B.
as arrow shown.
Step 4: Remove 6 screws.
Step 7: Remove the Jog Knob using a screwdriver as arrow
shown.
Caution: Do not exert strong force as it may cause damage to
the top cabinet.
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Step 8: Release 6 catches.
RX-ES23E / RX-ES23 EG
10.2.3. Disassembly of Speakers.
Follow (step 1) to (step 9) of item 10.2.1.
Follow (step 1) to (step 10) of item 10.2.2.
Step 9: Remove the Panel P.C.B. as arrow shown.
Step 1: Remove 8 screws.
Step 2: Flip the both side speakers as arrow shown.
Step 3: Desolder the wire at speaker terminal to remove
speaker.
Step 10: Flip the Panel P.C.B. over.
10.2.4. Disassembly of Deck Mechanism.
Follow (step 1) to (step 9) of item 10.2.1.
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RX-ES23E / RX-ES23 EG
Step 1: Remove 4 screws.
Step 3: Release the connector (CP1450) to remove the Deck
Mechanism.
10.2.5. Disassembly of Main, Standby LED
and Sensor P.C.B.
Follow (step 1) to (step 9) of item 10.2.1.
Follow (step 1) to (step 3) of item 10.2.4.
Note: Be careful of connectors (CP1301 & CP1902) while
removing the deck mechanism.
Step 2: Remove the deck mechanism as arrow shown.
Step 1: Remove 2 screws.
Step 2: Release 4 clutches.
Step 3: Remove the mecha chassis.
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Step 4: Remove 2 screws.
Step 5: Release all the connectors (CP501, CP402 & CP801).
RX-ES23E / RX-ES23 EG
Step 6: Release 1 Catch and remove Standb y Led P.C.B..
Step 7: Release the Sensor P.C.B. as arrow shown.
Step 8: Remove the Main P.C.B. as arrow shown.
10.2.6. Disassembly of Battery and Power
P.C.B.
Follow (step 1) to (step 9) of item 10.2.1.
Follow (step 1) to (step 3) of item 10.2.4.
Follow (step 1) to (step 8) of item 10.2.5.
Step 1: Remove 1 screw.
Step 2: Remove the Battery Support P.C.B..
Note: Remember to place the Battery Support P.C.B. to
original location.
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RX-ES23E / RX-ES23 EG
Step 3: Remove the Battery P.C.B. as arrow shown.
Step 5: Remove the transfo rmer together with Battery P.C.B.
and Power P.C.B. as arrow shown.
Step 4: Remove 3 screws.
10.2.7. Disassembly of CD Loading
Mechanism.
Follow (step 1) to (step 9) of item 10.2.1.
Follow (step 1) to (step 3) of item 10.2.4.
Follow (step 1) to (step 8) of item 10.2.5.
Step 1: Remove 4 screws.
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Step 2: Remove the CD loading mechanism as arrow shown.
RX-ES23E / RX-ES23 EG
Step 1: Remove the cassette open spring.
10.2.8. Replacement of Cassette Panel.
Follow (step 1) to (step 9) of item 10.2.1.
Step 2: Push the cassette panel slowly to the right.
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RX-ES23E / RX-ES23 EG
Step 3: Push the cassette panel slowly to the left using a screw
driver.
Caution: Be carefu l of using/exerting strong forces.
Step 4: Remove the cassette panel from top cabine t as arrow
shown.
10.3. Procedures for Replacing
Pinch Roller and Head Block
(Deck Mechanism Unit)
10.4. Procedures for Replacing
Motor, Capstan Belt A,
Capstan Belt B, and Winding
Belt (Deck Mechanism Unit)
Follow (step 1) to (step 9) of item 10.2.1.
Follow (step 1) to (step 3) of item 10.2.4.
Follow (step 1) of item 10.3.
Follow (step 1) to (step 9) of item 10.2.1.
Follow (step 1) to (step 3) of item 10.2.4.
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RX-ES23E / RX-ES23 EG
21
RX-ES23E / RX-ES23 EG
Follow (step 1) to (step 3) of item 10.2.4.
Follow (step 1) of item 10.3.
10.6. Procedures of Replacing
Traverse Base (Unit), Driving
Gear, and Cam Gear (CD
Mechanism Unit)
10.6.1. Disassembly of the Disc Tray.
Follow (step 1) to (step 9) of item 10.2.1.
Follow (step 1) to (step 3) of item 10.2.4.
Follow (step 1) to (step 8) of item 10.2.5.
Follow (step 1) to (step 2) of item 10.2.7.
10.5. Procedures for Replacing
Parts on Deck Mechanism
PCB
Follow (step 1) to (step 9) of item 10.2.1.
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RX-ES23E / RX-ES23 EG
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RX-ES23E / RX-ES23 EG
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RX-ES23E / RX-ES23 EG
10.7. Procedures for Replacing
Optical Pickup (CD Mechanism
Unit)
Follow (step 1) to (step 9) of item 10.2.1.
Follow (step 1) to (step 3) of item 10.2.4.
Follow (step 1) to (step 8) of item 10.2.5.
Follow (step 1) to (step 2) of item 10.2.7.
Follow (step 1) to (step 4) of item 10.6.1.
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