Read Panasonic RX-ES23EE Service Manual online
n RADIO
Frequency range
FM
87.50-108.00 MHz (50 kHz steps)
AM
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
2004 Co. .
RX-ES23EE
Colour
(S)..........Silver Type
n GENERAL
Speakers
8 cm 2.7
Ω x 2
Jacks
Output
Phones: 3.5 mm stereo (16-32
Ω )
Power requirement
AC
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
clock
6 V [Four R6 / LR6 (AA, UM-3)
batteries]
l Do not use rechargeable type batteries
Dimensions
529 mm (W) x 144 mm (H) x 276
mm (D)
Mass
3.9 kg without batteries
Power consumption in standby
mode
mode
2.3 W
Notes:
1.
Specifications are subject to change without notice.
2.
Mass and dimensions are approximate.
Portable Stereo CD System
Specification
Order No. MD0411558C3
1 Safety Precautions
3
1.1.
GENERAL GUIDELINES
3
2 Before Repair and Adjustment
4
3 Protection Circuitry
4
4 Handling the Lead Solder
4
4.1.
About lead free solder (PbF)
4
5 Precaution of Laser Diode
5
6 Handling Precautions For Traverse Deck
6
7 Accessories
7
8 Operation Procedures
8
8.1.
Main Unit
8
8.2.
Remote Control
9
9 Information on MP3
10
10 Disassembly and Main Component Replacement Procedures
and Operational Check
11
10.1. Disassembly flow chart
11
10.2. Checking Procedure for each major P.C.B.
12
10.3. Procedures for Replacing Pinch Roller and Head Block
(Deck Mechanism Unit)
20
10.4. Procedures for Replacing Motor, Capstan Belt A, Capstan
Belt B, and Winding Belt (Deck Mechanism Unit)
20
10.5. Procedures for Replacing Parts on Deck Mechanism PCB
22
10.6. Procedures of Replacing Traverse Base (Unit), Driving
Gear, and Cam Gear (CD Mechanism Unit)
22
10.7. Procedures for Replacing Optical Pickup (CD Mechanism
Unit)
25
10.8. Procedures for Replacement Traverse Gear A and
Traverse Gear B (CD Mechanism Unit)
26
11 Procedure for checking of the major P.C.B.
28
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.
28
12 Self Diagnostic Function
29
12.1. Self-diagnosis Function
29
12.2. Setting of doctor mode
31
13 Measurements and Adjustments
37
13.1. Tuner Section
37
13.2. Deck Section
38
14 Voltage Measurement
40
14.1. Main P.C.B.
40
14.2. CD Servo P.C.B.
41
15 Waveform Chart
42
16 Notes of Schematic Diagram
43
17 Schematic Diagram
44
17.1. CD SERVO CIRCUIT
44
17.2. MAIN CIRCUIT
46
17.3. MAIN (TUNER) CIRCUIT
53
17.4. MAIN (DECK) CIRCUIT and DECK MECHANISM
CIRCUIT
55
17.5. PANEL CIRCUIT, STANDBY LED CIRCUIT, BATTERY
CIRCUIT, SENSOR CIRCUIT and POWER CIRCUIT
57
18 Printed Circuit Board
58
18.1. CD SERVO P.C.B
58
18.2. MAIN P.C.B.
59
18.3. PANEL P.C.B. and DECK MECHANISM P.C.B.
61
18.4. STANDBY LED P.C.B., BATTERY P.C.B. and SENSOR
P.C.B.
62
18.5. POWER P.C.B.
63
19 Wiring Connection Diagram
64
20 Type Illustration of IC ’ s, Transistors and Diodes
66
21 Terminal Function Of IC ’ s
67
21.1. IC801 (MN101C74GAA1): Microprocessor
67
22 Troubleshooting Flowchart (CD Section Circuit)
68
23 Parts Location and Replacement Parts List
70
23.1. Deck Mechanism (RAA4401-1V)
71
23.2. CD Loading Mechanism
73
23.3. Cabinet Part List
75
23.4. Electrical Part List
77
23.5. Packaging Materials & Accessories Parts List
83
23.6. Packaging
83
CONTENTS
Page
Page
2
RX-ES23EE
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.
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
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 1M
chassis,the reading should be between 1M
Ω and 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 1.5k
2. Connect a 1.5k
Ω, 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
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 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.
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.
3
RX-ES23EE
2 Before Repair and Adjustment
Disconnect AC power, discharge Power Supply Capacitors C301, C131, C231, C310, C307, C309 and C331 through a 10
Ω, 1 W
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.
devices.
After repairs are completed, restore power gradually using a variac, to avoid overcurrent.
Current consumption at AC 220 V, 50 Hz in NO SIGNAL mode should be ~180 mA respectively.
Current consumption at AC 240 V, 60 Hz in NO SIGNAL mode should be ~129 mA respectively.
Current consumption 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 connection 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 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.
· 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 ofthe 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.
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.
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).
(370 ± 10°C).
· Pb free solder will tend to splash when heated too high (about 1100°F/600°C).
· When soldering or unsoldering, please completely remove all of the solder on the pins or solder area, and be sure to heat the
· When 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.
4
RX-ES23EE
