Panasonic RX-ES23GC / RX-ES23GS / RX-ES23GN / RX-ES23GT Service Manual ▷ View online
n RADIO
Frequency range
FM
87.50-108.00 MHz (50 kHz steps)
AM
522-1629 kHz (9 kHz steps)
520-1630 kHz (10 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
8 cm 2.7
Ω x 2
Jacks
2005 Co. .
RX-ES23GC
RX-ES23GS
RX-ES23GN
RX-ES23GT
RX-ES23GS
RX-ES23GN
RX-ES23GT
Colour
(S).......... Silver Type
Output
Phones: 3.5 mm stereo (16-32
Ω)
Power requirement (For GC / GS)
AC
110-127 V / 220-240 V, 50 / 60 Hz
Power consumption
20 W
Power requirement (For GN)
AC
230-240 V, 50 Hz
Power consumption
23 W
Power requirement (For GT)
AC
110 V, 60 Hz
Power consumption
26 W
Battery
12 V [Eight R20/LR20 (D, UM-1)
batteries]
l Do not use rechargeable type batteries
Memory backup for
computer/clock
computer/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 (For GC / GS / GN)
3.9 kg without batteries
Mass (For GT)
3.6 kg without batteries
Power consumption in standby
mode (For GC / GS)
mode (For GC / GS)
3.0 W (117 V)
3.5 W (240 V)
3.5 W (240 V)
Power consumption in standby
mode (For GN / GT)
mode (For GN / GT)
2.3 W
Portable Stereo CD System
Specification
Order No. MD0502018C3
Notes:
1.
Specifications are subject to change without notice.
2.
Mass and dimensions are approximate
1 Safety Precautions
3
1.1.
GENERAL GUIDELINES
3
2 Caution for AC Mains Lead
4
3 Before Use
5
4 Before Repair and Adjustment
5
5 Protection Circuitry
5
6 Handling the Lead Solder
5
6.1.
About lead free solder (PbF)
5
7 Precaution of Laser Diode
6
8 Handling Precautions For Traverse Deck
7
9 Accessories
8
10 Operation Procedures
9
10.1. Main unit
9
10.2. Remote control
10
11 Information on MP3
11
12 Disassembly and Main Component Replacement Procedures
and Operational Check
12
12.1. Disassembly flow chart
12
12.2. Checking Procedure for each major P.C.B.
13
12.3. Procedures for Replacing Pinch Roller and Head Block
(Deck Mechanism Unit)
21
12.4. Procedures for Replacing Motor, Capstan Belt A, Capstan
Belt B, and Winding Belt (Deck Mechanism Unit)
21
12.5. Procedures for Replacing Parts on Deck Mechanism PCB
23
12.6. Procedures of Replacing Traverse Base (Unit), Driving
Gear, and Cam Gear (CD Mechanism Unit)
23
12.7. Procedures for Replacing Optical Pickup (CD Mechanism
Unit)
26
12.8. Procedures for Replacement Traverse Gear A and
Traverse Gear B (CD Mechanism Unit)
27
13 Procedure for checking of the major P.C.B.
29
13.1. 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.
29
14 Self Diagnostic Function
30
14.1. Self-Diagnosis Function
30
14.2. Setting of doctor mode
32
15 Measurements and Adjustments
38
15.1. Tuner Section
38
15.2. Deck Section
39
16 Voltage Measurement
41
16.1. Main P.C.B.
41
16.2. CD Servo P.C.B.
42
17 Waveform Chart
43
18 Notes of Schematic Diagram
44
19 Schematic Diagram
45
19.1. CD SERVO CIRCUIT
45
19.2. MAIN CIRCUIT
47
19.3. MAIN (TUNER) CIRCUIT
54
19.4. MAIN (DECK) CIRCUIT and DECK MECHANISM
CIRCUIT
56
19.5. PANEL CIRCUIT, STANDBY LED CIRCUIT, BATTERY
CIRCUIT, SENSOR CIRCUIT and POWER CIRCUIT
58
20 Printed Circuit Board
59
20.1. CD SERVO P.C.B.
59
20.2. MAIN P.C.B.
60
20.3. PANEL P.C.B. and DECK MECHANISM P.C.B.
62
20.4. STANDBY LED P.C.B., BATTERY P.C.B. and SENSOR
P.C.B.
63
20.5. POWER P.C.B.
64
21 Wiring Connection Diagram
65
22 Type Illustration of IC 痴, Transistors and Diodes
67
23 Terminal Function Of IC 痴
68
23.1. IC801 (MN101C74GAA1): Microprocessor
68
24 Troubleshooting Flowchart (CD Section Circuit)
69
25 Parts Location and Replacement Parts List
71
25.1. Deck Mechanism (RAA4401-1V)
72
25.2. CD Loading Mechanism
74
25.3. Cabinet Part List
76
25.4. Electrical Part List
78
25.5. Packaging Materials & Accessories Parts List
84
25.6. Packaging
84
CONTENTS
Page
Page
2
RX-ES23GC / RX-ES23GS / RX-ES23GN / RX-ES23GT
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 measuremen ts.
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 measuremen ts.
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 measuremen t is outside of 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-ES23GC / RX-ES23GS / RX-ES23GN / RX-ES23GT
2 Caution for AC Mains Lead
4
RX-ES23GC / RX-ES23GS / RX-ES23GN / RX-ES23GT
