Panasonic SAXR55P - A/V RECEIVER User manual

nAMPLIFIER SECTION
Rated minimum sine wave RMS power output
20 Hz-20 kHz both channels driven
0.09 % total harmonic distortion 100 W per channel
(6 Ω)
1 kHz continuous power output both channels driven
0.09 % total harmonic distortion 105 W per channel
(6 Ω)
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
0.9 % total harmonic distortion at 1kHz
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 6-8 Ω
A and B 6-8 Ω
BI-WIRE 6-8 Ω
Center 6-8 Ω
Surround (L/R) 6-8 Ω
Surround Back (L/R) 6-8 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
©2005 Matsushita Electric Industrial Co. Ltd.. All
rights reserved. Unauthorized copying and
distribution is a violation of law.
SA-XR55P
SA-XR55PC
Colour
(S)...............Silver Type
(K)...............Black Type (P only)
Input sensitivity
CD, TAPE, TV, DVD, DVD RECORDER,
VCR1, VCR2
27 mV
(200mV, IHF ’66)
Input impedance
CD, TAPE, TV, DVD, DVD RECORDER,
VCR1, VCR2
22 kΩ
S/N (IHF A)
CD, TV, DVD, DVD RECORDER
(Digital Input)
85 dB
(103 dB, IHF ’66)
Tone controls
BASS 50 Hz, +10 to -10 dB
TREBLE 20kHz,+10to-10dB
Subwoofer frequency response (-6 dB) 7 Hz-200 Hz
nFM TUNER SECTION
Frequency range 87.9-107.9 MHz
Sensitivity 11.2 dBf
(2 µV, IHF ’58)
50 dB quieting sensitivity
MONO 18.3 dBf
(4.5 µV, IHF ’58)
STEREO 38.3 dBf
(45 µV, IHF ’58)
Total harmonic distortion
MONO 0.2%
STEREO 0.3%
S/N
AV Control Receiver
Specification
ORDER NO. MD0504178C1
A1

MONO 73 dB
STEREO 67 dB
Frequency response 20 Hz-15 kHz, +1 dB,
-2 dB
Alternate channel selectivity 65 dB
Capture ratio 1.5 dB
Image rejection at 98 MHz 40 dB
Spurious response rejection at 98 MHz 75 dB
AM suppression 50 dB
Stereo separation
1 kHz 40 dB
10 kHz 30 dB
Antenna terminal 75 Ω(unbalanced)
nAM TUNER SECTION
Frequency range 530-1710 kHz
Sensitivity 20 µV, 330 µV/m
Selectivity 55 dB
IF rejection at 1000 kHz 50 dB
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
S-Video
1 SAFETY PRECAUTIONS 4
1.1. GENERAL GUIDELINES 4
2 Before Repair and Adjustment 5
3 Protection Circuitry 5
4 Handling the Lead-free Solder 5
4.1. About lead free solder (PbF) 5
5 Accessories 6
6 Operating Instructions 7
6.1. Main Unit 7
6.2. Remote Control 8
6.3. Home Theater Connections 9
6.4. Other Connections 14
7 Disassembly and Main Component Replacement Procedures
and Operational Check 17
7.1. Disassembly flow chart 17
7.2. P.C.B. Positions 18
7.3. Disassembly of Top Cabinet. 18
7.4. Checking for the DSP P.C.B. (Side A/B) and Main P.C.B.
(Side A). 19
Input TV, DVD, DVD
RECORDER
Output TV MONITOR
Component Video
Input TV, DVD, DVD
RECORDER
Output TV MONITOR
nGENERAL
Power supply AC 120 V, 60 Hz
Power consumption 135 W
Dimensions (W × H × D) 430 mm × 107.5 mm ×
394 mm
(16-15/16” × 4-7/32” × 15-1/2”)
Mass 4.6 kg (10.1 lb.)
nDIN POWER
1 kHz, T.H. D 1% 2 x 100 W (6 Ω)
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.
7.5. Disassembly and Checking of Main P.C.B. (Side B) 20
7.6. Disassembly of Tuner Pack and Tuner Extent P.C.B. 20
7.7. Disassembly and Checking of Speaker P.C.B. 21
7.8. Disassembly and Checking of Component Video P.C.B.
21
7.9. Disassembly and Checking of Video & Optical P.C.B. 22
7.10. Disassembly of Rear Panel 22
7.11. Disassembly and Checking of Input P.C.B. 23
7.12. Disassembly of Front Panel 24
7.13. Disassembly and Checking of Panel P.C.B., Volume
P.C.B. and Headphone P.C.B. 25
7.14. Disassembly and Checking of Power P.C.B. 26
8 Self Diagnosis Display Function 27
8.1. Automatically Displayed Error Codes 27
8.2. Display Details 27
8.3. Returning to Normal Display 27
8.4. Overload/Shutdown Detection intenal Condition 27
8.5. Overload/Thermal Detection Display 27
8.6. Activating Self Diagnosis Function (Servicing Mode) 27
8.7. Analog 6.1 CH Output Check Method 28
CONTENTS
Page Page
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8.8. Returning to Normal Display 28
8.9. Activating Self Diagnosis Function (Doctor Mode) 28
9 Voltage Measurement and Waveform Chart 30
9.1. Voltage Measurement 30
9.2. Waveform Chart 37
10 Block Diagram 39
11 Notes of Schematic Diagram 51
12 Schematic Diagram 52
12.1. DSP Circuit 52
12.2. Main Circuit 57
12.3. Input Circuit &Tuner Extent Circuit 75
12.4. Panel Circuit 80
12.5. Speaker Circuit, Headphone Circuit & Volume Circuit 82
12.6. Power Circuit 83
12.7. Video and Optical Circuit 87
12.8. Component Video Circuit 90
13 Printed Circuit Board 91
13.1. DSP P.C.B. (Side A & B) 91
13.2. Main P.C.B. (Side A & B) 93
13.3. Input P.C.B. 97
13.4. Tuner Extent P.C.B., Panel P.C.B. & Headphone P.C.B.
99
13.5. Volume P.C.B. & Speaker P.C.B. 101
13.6. Power P.C.B. 102
13.7. Video & Optical P.C.B. & Component Video P.C.B. 103
14 Wiring Connection Diagram 105
15 Type Illustration of ICｴs, Transistors and Diodes 107
16 Terminal Function of ICs 108
16.1. IC6801 (C2BBGF000669): Microprocessor 108
17 Parts Location and Replacement Parts List 109
17.1. Cabinet Parts Location 110
17.2. Electrical Parts List 113
17.3. Packing Materials & Accessories Parts List 129
17.4. Packaging 129
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(This “Safety Precaution” is applied only in U.S.A.)
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. Before servicing, unplug the power cord to prevent an electric shock.
2. When replacing parts, use only manufacturer’s recommended components for safety.
3. Check the condition of the power cord. Replace if wear or damage is evident.
4. After servicing, be sure to restore the lead dress, insulation barriers, insulation papers, shields, etc.
5. Before returning the serviced equipment to the customer, be sure to make the following insulation resistance test to prevent the
customer from being exposed to a shock hazard.
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-XR55P / SA-XR55PC

1.1.3. CAUTION FOR FUSE REPLACEMENT
2 Before Repair and Adjustment
Disconnect AC power, discharge Power Supply Capacitors C707, C717 and C718 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 120 V, 50/60 Hz in NO SIGNAL mode should be 200~800 mA.
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.
· 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.
4 Handling the Lead-free 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 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-XR55P / SA-XR55PC

5 Accessories
Note : Refer to Packaging Materials & Accessories Part List (Section 17.3) for part number.
AC cord
FM indoor antenna
AM loop antenna
Remote control
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SA-XR55P / SA-XR55PC

6.1. Main Unit
6 Operating Instructions
7
SA-XR55P / SA-XR55PC

6.2. Remote Control
8
SA-XR55P / SA-XR55PC

6.3. Home Theater Connections
6.3.1. TV and DVD Player
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SA-XR55P / SA-XR55PC

10
SA-XR55P / SA-XR55PC

6.3.2. Speakers
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12
SA-XR55P / SA-XR55PC

6.3.3. AC Power Supply Cord
13
SA-XR55P / SA-XR55PC

6.4. Other Connections
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15
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SA-XR55P / SA-XR55PC

7 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.
7.1. 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-XR55P / SA-XR55PC

7.2. P.C.B. Positions
7.3. 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.
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SA-XR55P / SA-XR55PC

Step 4 : Remove the top cabinet.
7.4. 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 7.3.
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-XR55P / SA-XR55PC

Step 5 : Connect the DSP P.C.B. (Side B) and Main P.C.B.
(Side A) by using the extension cable then proceed with the
checking.
7.5. Disassembly and Checking of
Main P.C.B. (Side B)
· Follow the (Step 1) -(Step 4) of item 7.3.
· Follow the (Step 1) -(Step 5) of item 7.4.
Steps 1 and 2 : Remove 4 screws altogether.
Step 3 : Detach the 25 pin FFC wire (REE1324) between
connectors P6501B (Main P.C.B.) and P6501A (Input P.C.B.)
Step 4 : Flip over the Main P.C.B. as arrow shown.
Step 5 : Check the Main P.C.B (Side B) by connecting the
extension cable (RFKZ0317-25 pin).
7.6. Disassembly of Tuner Pack
and Tuner Extent P.C.B.
· Follow the (Step 1) -(Step 4) of item 7.3.
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SA-XR55P / SA-XR55PC