Panasonic SA-XR55E User manual

nAMPLIFIER SECTION
Power output (at AC 230-240 V)
DIN 1 kHz (T.H.D. 1 %) 2 x 100 W (6 Ω)
20 Hz-20 kHz continuous power
output both channels driven
2x80W(6Ω)
Total harmonic distortion
rated power at 20 Hz-20 kHz 0.09 % (6 Ω)
Power bandwidth
both channels driven, -3 dB 4 Hz-88 kHz
(6 Ω,0.9%)
Power output each channel driven (at AC 230-240 V)
DIN 1 kHz (T.H.D. 1 %)
Front (L/R) 100 W (6 Ω)
Center 100 W (6 Ω)
Surround (L/R) 100 W (6 Ω)
Surround Back (L/R) 100 W (6 Ω)
Load impedance
Front (L/R)
AorB 6-16 Ω
A and B 6-16 Ω
BI-WIRE 6-16 Ω
Center 6-16 Ω
Surround (L/R) 6-16 Ω
Surround Back (L/R) 6-16 Ω
Frequency response
CD, TAPE, TV, DVD, DVD RECORDER,
VCR1, VCR2
4 Hz-88 kHz, ±3 dB
DVD 6CH 4 Hz-44 kHz, ±3 dB
Input sensitivity and impedance
CD, TAPE, TV, DVD/DVD 6CH, DVD
RECORDER, VCR1, VCR2
200 mV/22 kΩ
©2005 Matsushita Electric Industrial Co. Ltd.. All
rights reserved. Unauthorized copying and
distribution is a violation of law.
SA-XR55E
SA-XR55EB
SA-XR55EG
Colour
(S)...............Silver Type
(K)...............Black Type (E/EG only)
S/N at rated power (6 Ω
ΩΩ
Ω)
CD, TV, DVD, DVD RECORDER
(Digital Input)
90 dB
(IHF, A: 103 dB)
Tone controls
BASS 50 Hz, +10 to -10 dB
TREBLE 20kHz,+10to-10dB
Output voltage
TAPE, DVD RECORDER 200 mV
Channel balance (250 Hz-6.3 kHz) ±1 dB
Channel separation 55 dB
Subwoofer frequency response (-6 dB) 7 Hz-200 Hz
nFM TUNER SECTION
Frequency range 87.50-108.00 MHz
Sensitivity
S/N 30 dB 1.5 µV/75 Ω
S/N 26 dB 1.3 µV/75 Ω
S/N 20 dB 1.2 µV/75 Ω
IHF usable sensitivity (IHF ’58) 1.5 µV/75 Ω
IHF 46 dB stereo quieting sensitivity 22 µV/75 Ω
Total harmonic distortion
MONO 0.2%
STEREO 0.3%
S/N
MONO 60 dB
STEREO 58 dB
Frequency response
AV Control Receiver
Specification
ORDER NO. MD0505214C2

20 Hz-15 kHz +1 dB, -2 dB
Alternate channel selectivity
±400 kHz 65 dB
Capture ratio 1.5 dB
Image rejection at 98 MHz 40 dB
IF rejection at 98 MHz 70 dB
Spurious response rejection at 98 MHz 70 dB
AM suppression 50 dB
Stereo separation
1 kHz 40 dB
Carrier leak
19 kHz -30 dB
38 kHz -50 dB
Channel balance (250 Hz-6.3 kHz) ±1.5dB
Limiting point 1.2 µV
Bandwidth
IF amplifier 180 kHz
FM demodulator 1000 kHz
Antenna terminal 75 Ω(unbalanced)
nAM TUNER SECTION
Frequency range 522-1611 kHz
(9 kHz step)
530-1620 kHz
(10 kHz step)
Sensitivity 20 µV, 330 µV/m
Selectivity (at 999 kHz) 55 dB
IF rejection (at 999 kHz) 50 dB
1 SAFETY PRECAUTIONS 4
1.1. GENERAL GUIDELINES 4
2 Caution for AC Mains Lead 5
3 Before Repair and Adjustment 6
4 Protection Circuitry 6
5 Handling the Lead-free Solder 6
5.1. About lead free solder (PbF) 6
6 Accessories 7
7 Operating Instructions 8
7.1. Main Unit 8
7.2. Remote Control 9
7.3. Home Theater Connections 10
7.4. Other Connections 15
8 Disassembly and Main Component Replacement Procedures
and Operational Check 18
8.1. Disassembly flow chart 18
nVIDEO SECTION
Output voltage at 1 V input (unbalanced) 1±0.1 Vp-p
Maximum input voltage 1.5 Vp-p
Input/output impedance 75 Ω(unbalanced)
S-Video
Input TV, DVD, DVD
RECORDER
Output TV MONITOR
Component Video
Input TV, DVD, DVD
RECORDER
Output TV MONITOR
nGENERAL
Power supply AC 230-240 V, 50 Hz
Power consumption 135 W
Dimensions (W × H × D) 430 mm × 107.5 mm ×
394 mm
Mass 4.6 kg
Notes:
1. Specifications are subject to change without notice.
Mass and dimensions are approximate.
2. Total harmonic distortion is measured by the digital spectrum
analyzer.
8.2. P.C.B. Positions 19
8.3. Disassembly of Top Cabinet. 19
8.4. Checking for the DSP P.C.B. (Side A/B) and Main P.C.B.
(Side A). 20
8.5. Disassembly and Checking of Main P.C.B. (Side B) 21
8.6. Disassembly of Tuner Pack and Tuner Extent P.C.B. 21
8.7. Disassembly and Checking of Speaker P.C.B. 22
8.8. Disassembly and Checking of Component Video P.C.B.
22
8.9. Disassembly and Checking of Video & Optical P.C.B. 23
8.10. Disassembly of Rear Panel 23
8.11. Disassembly and Checking of Input P.C.B. 24
8.12. Disassembly of Front Panel 25
8.13. Disassembly and Checking of Panel P.C.B., Volume
P.C.B. and Headphone P.C.B. 26
8.14. Disassembly and Checking of Power P.C.B. 27
9 Self Diagnosis Display Function 28
CONTENTS
Page Page
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SA-XR55E / SA-XR55EB / SA-XR55EG

9.1. Automatically Displayed Error Codes 28
9.2. Display Details 28
9.3. Returning to Normal Display 28
9.4. Overload/Shutdown Detection intenal Condition 28
9.5. Overload/Thermal Detection Display 28
9.6. Activating Self Diagnosis Function (Servicing Mode) 28
9.7. Analog 6.1 CH Output Check Method 29
9.8. Returning to Normal Display 29
9.9. Activating Self Diagnosis Function (Doctor Mode) 29
10 Voltage Measurement and Waveform Chart 31
10.1. Voltage Measurement 31
10.2. Waveform Chart 38
11 Block Diagram 40
12 Notes of Schematic Diagram 52
13 Schematic Diagram 53
13.1. DSP Circuit 53
13.2. Main Circuit 58
13.3. Input Circuit &Tuner Extent Circuit 76
13.4. Panel Circuit 81
13.5. Speaker Circuit, Headphone Circuit & Volume Circuit 83
13.6. Power Circuit 84
13.7. Video & Optical Circuit 88
13.8. Component Video Circuit 91
14 Printed Circuit Board 92
14.1. DSP P.C.B. (Side A & B) 92
14.2. Main P.C.B. (Side A & B) 94
14.3. Input P.C.B. 98
14.4. Tuner Extent P.C.B., Panel P.C.B. & Headphone P.C.B.
100
14.5. Volume P.C.B. & Speaker P.C.B. 102
14.6. Power P.C.B. 103
14.7. Video & Optical P.C.B. & Component Video P.C.B. 104
15 Wiring Connection Diagram 106
16 Type Illustration of ICｴs, Transistors and Diodes 108
17 Terminal Function of ICs 109
17.1. IC6801 (C2BBGF000669): Microprocessor 109
18 Parts Location and Replacement Parts List 110
18.1. Cabinet Parts Location 111
18.2. Electrical Parts List 114
18.3. Packing Materials & Accessories Parts List 130
18.4. Packaging 130
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SA-XR55E / SA-XR55EB / SA-XR55EG

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, make 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 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 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.
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SA-XR55E / SA-XR55EB / SA-XR55EG

2 Caution for AC Mains Lead
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SA-XR55E / SA-XR55EB / SA-XR55EG

3 Before Repair and Adjustment
Disconnect AC power, discharge Power Supply Capacitors C707, C717, C718 and C924 through a 10 Ω, 10 W resistor to ground.
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 230-240 V, 50 Hz in NO SIGNAL mode should be ~400 mA.
4 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.
5 Handling the Lead-free Solder
5.1. 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 soldering iron with temperature control, 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).
· 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.
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SA-XR55E / SA-XR55EB / SA-XR55EG

6 Accessories
Note : Refer to Packaging Materials & Accessories Part List (Section 18.3) for part number.
Remote control
AC cord (For EB
only)
AC cord (For E/EG
only)
FM indoor
antenna
AM loop antenna
Antenna
plug
adaptor
(For EB
only)
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SA-XR55E / SA-XR55EB / SA-XR55EG

7.1. Main Unit
7 Operating Instructions
8
SA-XR55E / SA-XR55EB / SA-XR55EG

7.2. Remote Control
9
SA-XR55E / SA-XR55EB / SA-XR55EG

7.3. Home Theater Connections
7.3.1. TV and DVD Player
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SA-XR55E / SA-XR55EB / SA-XR55EG

11
SA-XR55E / SA-XR55EB / SA-XR55EG

7.3.2. Speakers
12
SA-XR55E / SA-XR55EB / SA-XR55EG

13
SA-XR55E / SA-XR55EB / SA-XR55EG

7.3.3. AC Power Supply Cord
14
SA-XR55E / SA-XR55EB / SA-XR55EG

7.4. Other Connections
15
SA-XR55E / SA-XR55EB / SA-XR55EG

16
SA-XR55E / SA-XR55EB / SA-XR55EG

17
SA-XR55E / SA-XR55EB / SA-XR55EG

8 Disassembly and Main Component Replacement
Procedures and Operational Check
“ATTENTION SERVICER”
Some chassis components may be have sharp edges. Be careful when disassembling 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.
· Disassembly of Top Panel
· Checking for the DSP P.C.B. (Side A/B) and Main P.C.B. (Side A)
· Disassembly and checking of Main P.C.B. (Side B)
· Disassembly of Tuner Pack and Tuner Extent P.C.B.
· Disassembly and Checking of Speaker P.C.B.
· Disassembly and Checking of Component Video P.C.B.
· Disassembly and Checking of Video & Optical P.C.B.
· Disassembly of Rear Panel
· Disassembly of Checking of Input P.C.B.
· Disassembly of Front Panel
· Disassembly and Checking of Panel P.C.B., Volume P.C.B. and Headphone P.C.B.
· Disassembly and Checking of Power 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.
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SA-XR55E / SA-XR55EB / SA-XR55EG

8.2. P.C.B. Positions
8.3. Disassembly of Top Cabinet.
Step 1 : Remove 4 screws from the top cabinet.
Step 2 : Remove 3 screws from the rear panel.
Step 3 : Lift up the top cabinet as arrow shown.
19
SA-XR55E / SA-XR55EB / SA-XR55EG

Step 4 : Remove the top cabinet.
8.4. Checking for the DSP P.C.B.
(Side A/B) and Main P.C.B.
(Side A).
· Follow the (Step 1) -(Step 4) of item 8.3.
Step 1 : Check the DSP P.C.B. (Side A).
Step 2 : Remove 1 screw.
Step 3 : Release the claws of the P.C.B support then detach
the DSP. P.C.B.
Step 4 : Flip over the DSP P.C.B. as arrow shown.
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SA-XR55E / SA-XR55EB / SA-XR55EG