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ORDER NO. MD0504178C1
A1




AV Control Receiver
SA-XR55P
SA-XR55PC
Colour
(S)...............Silver Type
(K)...............Black Type (P only)




Specification
n AMPLIFIER SECTION Input sensitivity
Rated minimum sine wave RMS power output CD, TAPE, TV, DVD, DVD RECORDER, 27 mV
20 Hz-20 kHz both channels driven VCR1, VCR2 (200mV, IHF '66)
0.09 % total harmonic distortion 100 W per channel Input impedance
(6 ) CD, TAPE, TV, DVD, DVD RECORDER, 22 k
1 kHz continuous power output both channels driven VCR1, VCR2

0.09 % total harmonic distortion 105 W per channel S/N (IHF A)

(6 ) CD, TV, DVD, DVD RECORDER 85 dB
(Digital Input) (103 dB, IHF '66)
Total harmonic distortion
Tone controls
rated power at 20 Hz-20 kHz 0.09 % (6 )
BASS 50 Hz, +10 to -10 dB
Power bandwidth
TREBLE 20 kHz, +10 to -10 dB
both channels driven, -3 dB 4 Hz-88 kHz
(6 , 0.9 %) Subwoofer frequency response (-6 dB) 7 Hz-200 Hz

Power output each channel driven
0.9 % total harmonic distortion at 1kHz
Front (L/R) 100 W (6 )
Center 100 W (6 )
Surround (L/R) 100 W (6 ) n FM TUNER SECTION
Surround Back (L/R) 100 W (6 ) Frequency range 87.9-107.9 MHz
Load impedance Sensitivity 11.2 dBf
Front (L/R) (2 µV, IHF '58)
A or B 6-8 50 dB quieting sensitivity
A and B 6-8 MONO 18.3 dBf
BI-WIRE 6-8 (4.5 µV, IHF '58)
Center 6-8 STEREO 38.3 dBf
Surround (L/R) 6-8 (45 µV, IHF '58)
Surround Back (L/R) 6-8 Total harmonic distortion
Frequency response MONO 0.2%
CD, TAPE, TV, DVD, DVD RECORDER, 4 Hz-88 kHz, ±3 dB STEREO 0.3%
VCR1, VCR2
S/N
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
MONO 73 dB Input TV, DVD, DVD
STEREO 67 dB RECORDER

Frequency response 20 Hz-15 kHz, +1 dB, Output TV MONITOR

-2 dB Component Video

Alternate channel selectivity 65 dB Input TV, DVD, DVD
RECORDER
Capture ratio 1.5 dB
Output TV MONITOR
Image rejection at 98 MHz 40 dB
Spurious response rejection at 98 MHz 75 dB
n GENERAL
AM suppression 50 dB
Power supply AC 120 V, 60 Hz
Stereo separation
Power consumption 135 W
1 kHz 40 dB
Dimensions (W × H × D) 430 mm × 107.5 mm ×
10 kHz 30 dB
394 mm
Antenna terminal 75 (unbalanced)
(16-15/16" × 4-7/32" × 15-1/2")
Mass 4.6 kg (10.1 lb.)
n AM TUNER SECTION
Frequency range 530-1710 kHz
n DIN POWER
Sensitivity 20 µV, 330 µV/m
1 kHz, T.H. D 1% 2 x 100 W (6 )
Selectivity 55 dB
IF rejection at 1000 kHz 50 dB


n VIDEO SECTION
Output voltage at 1 V input (unbalanced) 1±0.1 Vp-p Notes:
Maximum input voltage 1.5 Vp-p 1. Specifications are subject to change without notice.
Input/output impedance 75 Mass and dimensions are approximate.
S-Video 2. Total harmonic distortion is measured by the digital spectrum
analyzer.




CONTENTS
Page Page
1 SAFETY PRECAUTIONS 4 7.5. Disassembly and Checking of Main P.C.B. (Side B) 20
1.1. GENERAL GUIDELINES 4 7.6. Disassembly of Tuner Pack and Tuner Extent P.C.B. 20
2 Before Repair and Adjustment 5 7.7. Disassembly and Checking of Speaker P.C.B. 21
3 Protection Circuitry 5 7.8. Disassembly and Checking of Component Video P.C.B. 21
4 Handling the Lead-free Solder 5 7.9. Disassembly and Checking of Video & Optical P.C.B. 22
4.1. About lead free solder (PbF) 5 7.10. Disassembly of Rear Panel 22
5 Accessories 6 7.11. Disassembly and Checking of Input P.C.B. 23
6 Operating Instructions 7 7.12. Disassembly of Front Panel 24
6.1. Main Unit 7 7.13. Disassembly and Checking of Panel P.C.B., Volume
6.2. Remote Control 8 P.C.B. and Headphone P.C.B. 25
6.3. Home Theater Connections 9 7.14. Disassembly and Checking of Power P.C.B. 26
6.4. Other Connections 14 8 Self Diagnosis Display Function 27
7 Disassembly and Main Component Replacement Procedures 8.1. Automatically Displayed Error Codes 27
and Operational Check 17 8.2. Display Details 27
7.1. Disassembly flow chart 17 8.3. Returning to Normal Display 27
7.2. P.C.B. Positions 18 8.4. Overload/Shutdown Detection intenal Condition 27
7.3. Disassembly of Top Cabinet. 18 8.5. Overload/Thermal Detection Display 27
7.4. Checking for the DSP P.C.B. (Side A/B) and Main P.C.B. 8.6. Activating Self Diagnosis Function (Servicing Mode) 27
(Side A). 19 8.7. Analog 6.1 CH Output Check Method 28

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SA-XR55P / SA-XR55PC
8.8. Returning to Normal Display 28 13.1. DSP P.C.B. (Side A & B) 91
8.9. Activating Self Diagnosis Function (Doctor Mode) 28 13.2. Main P.C.B. (Side A & B) 93
9 Voltage Measurement and Waveform Chart 30 13.3. Input P.C.B. 97
9.1. Voltage Measurement 30 13.4. Tuner Extent P.C.B., Panel P.C.B. & Headphone P.C.B. 99
9.2. Waveform Chart 37 13.5. Volume P.C.B. & Speaker P.C.B. 101
10 Block Diagram 39 13.6. Power P.C.B. 102
11 Notes of Schematic Diagram 51 13.7. Video & Optical P.C.B. & Component Video P.C.B. 103
12 Schematic Diagram 52 14 Wiring Connection Diagram 105
12.1. DSP Circuit 52 15 Type Illustration of IC s, Transistors and Diodes 107
12.2. Main Circuit 57 16 Terminal Function of ICs 108
12.3. Input Circuit &Tuner Extent Circuit 75 16.1. IC6801 (C2BBGF000669): Microprocessor 108
12.4. Panel Circuit 80 17 Parts Location and Replacement Parts List 109
12.5. Speaker Circuit, Headphone Circuit & Volume Circuit 82 17.1. Cabinet Parts Location 110
12.6. Power Circuit 83 17.2. Electrical Parts List 113
12.7. Video and Optical Circuit 87 17.3. Packing Materials & Accessories Parts List 129
12.8. Component Video Circuit 90 17.4. Packaging 129
13 Printed Circuit Board 91




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SA-XR55P / SA-XR55PC


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.


(This "Safety Precaution" is applied only in U.S.A.)
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 1M and 5.2.
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, 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 , 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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6 Operating Instructions
6.1. Main Unit




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SA-XR55P / SA-XR55PC


6.2. Remote Control




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6.3. Home Theater Connections
6.3.1. TV and DVD Player




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SA-XR55P / SA-XR55PC

6.3.2. Speakers




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6.3.3. AC Power Supply Cord




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6.4. Other Connections




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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 3 : Lift up the top cabinet as arrow shown.

Step 1 : Remove 4 screws from the top cabinet.
Step 2 : Remove 3 screws from the rear panel.




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SA-XR55P / SA-XR55PC




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 : 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 4 : Flip over the DSP P.C.B. as arrow shown.




Step 1 : Check the DSP P.C.B. (Side A).




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SA-XR55P / SA-XR55PC




Step 3 : Detach the 25 pin FFC wire (REE1324) between
connectors P6501B (Main P.C.B.) and P6501A (Input P.C.B.)




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.




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.
Steps 1 and 2 : Remove 4 screws altogether. · Follow the (Step 1) - (Step 4) of item 7.3.




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SA-XR55P / SA-XR55PC




Step 1: Remove 2 screws.




Step 1: Remove 5 screws.
Step 2: Remove the Speaker P.C.B. from rear panel as arrow
shown for checking.

7.8. Disassembly and Checking of
Component Video P.C.B.
· Follow the (Step 1) - (Step 4) of item 7.3.




Step 2: Remove the tuner pack together with the Tuner Extent
P.C.B. from the rear panel as arrow shown.




Step 3: Detach the tuner pack from the Tuner Extent P.C.B. as
arrow shown.

7.7. Disassembly and Checking of Step 1: Remove 4 screws.
Speaker P.C.B. Step 2: Remove the Component Video P.C.B. from rear panel
as arrow shown.
· Follow the (Step 1) - (Step 4) of item 7.3.

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SA-XR55P / SA-XR55PC




Step 2: Remove the Video & Optical P.C.B. from rear panel as
arrow shown.
Step 3: Flip over the Component Video P.C.B. as arrow shown
for checking

7.9. Disassembly and Checking of
Video & Optical P.C.B.
· Follow the (Step 1) - (Step 4) of item 7.3.
· Follow the (Step 1) - (Step 2) of item 7.6.
· Follow the (Step 1) - (Step 3) of item 7.8.




Step 3: Flip over the Video & Optical P.C.B. as arrow shown for
checking

7.10. Disassembly of Rear Panel
· Follow the (Step 1) - (Step 4) of item 7.3.
· Follow the (Step 1) of item 7.6.
· Follow the (Step 1) of item 7.7.
· Follow the (Step 1) of item 7.8.
· Follow the (Step 1) of item 7.9.




Step 1: Remove 7 screws.




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SA-XR55P / SA-XR55PC

Step 3: Remove the rear panel as arrows shown.

7.11. Disassembly and Checking of
Input P.C.B.
· Follow the (Step 1) - (Step 4) of item 7.3.
· Follow the (Step 1) of item 7.6.
· Follow the (Step 1) of item 7.7.
· Follow the (Step 1) of item 7.8.
· Follow the (Step 1) of item 7.9.
· Follow the (Step 1) - (Step 3) of item 7.10.




Step 1: Remove 11 screws.




Step 2: Be careful of the both side catches when remove the
rear panel.




Step 1: Remove 2 screws.
Step 2: Flip over the Input P.C.B. as arrow shown .




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SA-XR55P / SA-XR55PC




Step 3: Proceed to check the Input P.C.B.

7.12. Disassembly of Front Panel
· Follow the (Step 1) - (Step 4) of item 7.3.
Step 2: Be careful when remove the wires from the cord holder.




Step 1: Disconnect all the connectors (P951B, P902, P402,
P303).




Step 3: Remove 3 screws.
Step 4: Release the both claws and remove the front panel as
arrows shown.



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SA-XR55P / SA-XR55PC


7.13. Disassembly and Checking of
Panel P.C.B., Volume P.C.B.
and Headphone P.C.B.
· Follow the (Step 1) - (Step 4) of item 7.3.
· Follow the (Step 1) - (Step 4) of item 7.12.




Step 3: Remove 8 screws then remove the Panel P.C.B. as
arrow shown.




Step 1: Remove 5 screws.




Step 4: Remove the Selector and Volume knobs.




Step 2: Remove the front shield from the front panel as arrows
shown




Step 5: Remove 3 screws then remove the Volume P.C.B.




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SA-XR55P / SA-XR55PC




Step 3: Flip over the Power Supply P.C.B. as arrow shown.



Step 6: Reconnect all the connectors and checking for Volume
P.C.B., Panel P.C.B. and Headphone P.C.B.

7.14. Disassembly and Checking of
Power P.C.B.
· Follow the (Step 1) - (Step 4) of item 7.3.
· Follow the (Step 1) of item 7.6.
· Follow the (Step 1) of item 7.7.
· Follow the (Step 1) of item 7.8.
· Follow the (Step 1) of item 7.9.
· Follow the (Step 1) - (Step 3) of item 7.10.



Step 4: Checking for Power P.C.B.




Steps 1 and 2: Remove 9 screws altogether.




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SA-XR55P / SA-XR55PC


8 Self Diagnosis Display Function
This unit is equipped with the self diagnosis display function, which alarms faulty operation with error code. Use this function during
servicing.

8.1. Automatically Displayed Error Codes
An error code automatically appears on the display (LCD) when faulty operation is detected. Refer to Fig. 8.1.




Fig. 8.1


8.2. Display Details
Refer to the following table.
LCD display Symptom Cause and Remedy
OVERLOAD Speaker short, amplifier failure Speaker short and failure in power
Humidity protection activated amplifier, pre-amplifier circuits. Check for
faulty parts and replace with new parts if
necessary.
F70 Communication error between sub micro- Failure sub-micro processor and its
processor and its peripheral LSI peripherals LSI. Check for faulty parts and
replace with new parts if necessary.
F76 When the power is turned on, the unit Failure in the power circuit system of the
power automatically turns off; the power unit. This may happen when the direct
cannot be turned on. current electricity is supplied to speaker
terminals. Check for the above and replace
with new parts if necessary.


8.3. Returning to Normal Display
Press the POWER button on the unit to exit the function. The power is turned off.

8.4. Overload/Shutdown Detection intenal Condition
It detects OVERLOAD, POWER MALFUNCTION with [THRM_DET], [SHORT_DET] and [DC_DET] input port. It detects the
following condition depending on the input of the port as below table.


(H: DC ± 5V / L: DC ± 0V)
PROT Detection of malfunction Display and operation
SHORT_DET THRM_DET DC_DET
H L H Normal -----
L L H Speaker Short, Malfunction of Amplifier [OVERLOAD] / POWER OFF
L H H Detection of THERMAL PROTECTION
- - L Detection of POWER MALFUNCTION [ _ _ _ F76 _ _ _ ] / POWER OFF


8.5. Overload/Thermal Detection Display
When overload is detected, automatic POWER OFF will occur. But if any key on the remote control other than the [POWER] key
is pressed before that (including the [HELP] key), the scroll display will show [SWITCH_OFF_POWER]. Then, 1 second after
display of message, [OVERLOAD] will be shown on the scroll display.

8.6. Activating Self Diagnosis Function (Servicing Mode)
This mode can be used during servicing.


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SA-XR55P / SA-XR55PC

1. Plug the AC adapter to the power source. Press and hold down the [MULTI CONTROL] button and the [SPEAKERS A] button,
and then press the [POWER] button at the same time.
2. The message, [SERVICE] appears on the display for three seconds, and then disappears. Refer to Fig. 8.2.




Fig. 8.2

3. When the [TUNING DOWN] button is pressed, the current program filing number (ex. "M45_***" for MA123_45) appears. The
*** digit indicates the ROM checksum used for ROM collection, and if the unit is not loaded with ROM, "NO" appears.
When the TUNING UP button is pressed, the sub micro computer program filing number (ex. 523_***" for MA678_90) appears.
The *** digit indicates the ROM checksum used for ROM collection, and if the unit is not loaded with ROM, "NO" appears.

8.7. Analog 6.1 CH Output Check Method
When the [SUBWOOFER] button on the remote controller, the function is switched to "Input Inspection Mode", which output analog
input signals at L channel of VCR analog input to all channels.

8.8. Returning to Normal Display
Press the POWER button on the unit to exit the function. The power is turned off.

8.9. Activating Self Diagnosis Function (Doctor Mode)
This mode can be used during servicing.
1. Plug the AC adapter to the power source. Press and hold down the MULTI-SOURCE RE-MASTER button and the SPEAKERS
A button, and then press the POWER button at the same time.
2. Initialize all the setting and set the frequency "99.7MHz" to Tuner.
The message, "_DOCTOR_" appears on the display for three seconds, and then disappears. Refer to Fig. 8.3.




Fig. 8.3

3. Doctor mode function at some remote control codes as below table.
Remote Control Test Mode Function and settings
Selector Sound Mode other settings Vol/Tone
CH 1 TUNER STEREO Frequency : FM min -48dB/0dB
CH 2 TUNER STEREO Frequency : FM max -48dB/0dB
CH 3 TUNER STEREO FM 98.3MHz -18dB/0dB
CH 4 TUNER STEREO Frequency : AM min -48dB/0dB
CH 5 TUNER STEREO Frequency : AM max -48dB/0dB
CH 8 If the input selector is TUNER, auto tuning function is started to upward on current frequency.
CH 9 If the input selector is TUNER, auto tuning function is started to downward on current frequency.
CH 0 All indicators of FL are displayed. All LED are off. Refer to Fig. 8.4.
Note : After this setting, only `POWER' button or `Checker Command' code by the remote control can be entered.
CH UP Check Main µP software version.

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SA-XR55P / SA-XR55PC

CH DOWN Check Sub µP software version.
SUBWOOFER VCR 1 (Analog) - All CH Output Mode -18dB/0dB
MUTING DVD 6CH - - -18dB/0dB
PLIIx CD STEREO Analog -18dB/0dB
NEO:6 TV STEREO Analog -18dB/0dB
RE-MASTER DVD STEREO Analog -18dB/0dB
LEVEL DVR/DVD_REC STEREO Analog -18dB/0dB
EFFECT CD STEREO Digital (COAX 2) -48dB/0dB
OFF TV STEREO Digital (OPT 1) -48dB/0dB
SFC AV/MOVIE DVD STEREO Digital (COAX 1) -48dB/0dB
SFC MUSIC DVR/DVD_REC STEREO Digital (OPT 2) -48dB/0dB
TEST No change SURROUND Scan the test noise output channel with 500ms -18dB/0dB
intervals
-/L CD STEREO Balance is set to leftmost -18dB/0dB
+/R CD STEREO Balance is set to rightmost -18dB/0dB




Fig. 8.4




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SA-XR55P / SA-XR55PC


9 Voltage Measurement and Waveform Chart
Note:
· Indicated voltage values are the standard values for the unit measured by the DC electronic circuit tester (high-impedance)
with the chassis taken as standard.
Therefore, there may exist some errors in the voltage values, depending on the internal impedance of the DC circuit tester.
· Circuit voltage and waveform described herein shall be regarded as reference information when probing defect point
because it may differ from actual measuring value due to difference of Measuring instrument and its measuring condition
and product itself.

9.1. Voltage Measurement
9.1.1. DSP P.C.B.
DSP P.C.B.
Ref No. IC1001
MODE 1 2 3 4 5 6 7 8
CD PLAY 0 2.5 2.5 0 2.5 2.6 5.1 5.1
STANDBY 1.2 0.4 0.4 0 0.4 0.4 0.9 0.9
Ref No. IC1002
MODE 1 2 3 4 5
CD PLAY 0 0.1 0 0.2 0.2
STANDBY 0 0.2 0 0.1 0.1
Ref No. IC1003
MODE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
CD PLAY 1.3 1.3 1.3 1.3 2.3 3.3 1.3 3.3 0 - 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3
STANDBY 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Ref No. IC1003
MODE 21 22 23 24 25 26 27 28 29 30 31 32
CD PLAY 0 0 0 0 0 0 0 0 0 0.8 1.3 0
STANDBY 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0 0 0
Ref No. IC1005
MODE 1 2 3 4 5 6 7 8
CD PLAY 0.2 2.5 1.6 0 1.7 5.0 0 3.3
STANDBY 0.1 0.4 0 0 0 0 0 0
Ref No. IC1006
MODE 1 2 3 4 5 6 7 8
CD PLAY 2.5 1.6 1.6 0 1.6 3.3 3.3 3.3
STANDBY 0.4 0 0 0 0 0 0 0
Ref No. IC1007
MODE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
CD PLAY 0 0 0 1.2 1.2 1.2 0 0 0 3.3 0 0 0 0 1.2 0 0 1.6 1.6 0
STANDBY 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Ref No. IC1007
MODE 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
CD PLAY 0 1.2 1.2 0 0 0 1.2 1.2 1.2 1.6 1.6 1.6 3.3 1.7 0 1.2 1.6 1.7 1.2 0
STANDBY 0 0 0 0 0 0 0.1 0.1 0.1 0.1 0.1 0.1 0 1.4 0 0 1.4 1.4 0 0
Ref No. IC1007
MODE 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60
CD PLAY 0 0 1.2 - 3.3 0 0 0 0 1.2 1.2 0 3.3 3.3 4.3 4.3 0 0 1.2 3.3
STANDBY 0 0 0 0 0 1.2 1.1 0 0 0 0 1.4 1.4 0 1.4 1.4 1.4 0 0 0
Ref No. IC1007
MODE 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80
CD PLAY 0 0 1.2 1.2 1.3 1.3 1.3 2.3 0 1.2 1.2 1.2 - 1.2 1.2 1.2 0 0 1.2 1.2
STANDBY 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Ref No. IC1007
MODE 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100
CD PLAY 1.3 1.2 1.2 1.3 3.3 0 0 1.2 1.2 0 0 1.3 0 0 1.2 0 0 0 0 3.3
STANDBY 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.1 0 0 0 0
Ref No. IC1007
MODE 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120
CD PLAY 0 0 0 0 0 0 1.2 1.2 0.8 1.3 2.3 0 0 0 0 0 0 0 1.2 1.2
STANDBY 0 0 0 0.1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Ref No. IC1007
MODE 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140
CD PLAY 3.3 3.3 0 0 0 3.3 1.2 1.2 0 0 3.3 0 0 3.3 3.3 3.3 1.2 1.2 0 0
STANDBY 0 0 0 0.1 0.1 0 0 0 0 0 0.1 0 0 0 0 0 0 0 0 0
Ref No. IC1007
MODE 141 142 143 144
CD PLAY 0 3.3 3.3 3.3
STANDBY 0 0 0 0




30
SA-XR55P / SA-XR55PC

Ref No. IC1008
MODE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
CD PLAY 0 0 0 0 0 0 0 0 0 0 3.3 0 5.1 0 0 0 0 0 0 0
STANDBY 0 0 0 0 0 0 0 0 0 0 0 0 0.9 0 0 0 0 0 0 0
Ref No. IC1008
MODE 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
CD PLAY 0 0 1.7 1.7 1.3 1.6 1.6 1.2 1.5 1.7 3.3 1.5 0 0 3.3 0 0 3.3 1.2 1.2
STANDBY 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Ref No. IC1008
MODE 41 42 43 44 45 46 47 48
CD PLAY 0 1.6 0 1.6 0 1.6 0 1.6
STANDBY 0 0 0 0 0 0 0 0
Ref No. IC1009
MODE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
CD PLAY 2.5 0 2.6 2.6 2.6 3.3 0 3.3 0 3.3 0 0 0 3.3 1.2 1.6 1.6 1.7 3.3 0
STANDBY 0.1 0 0.2 0.2 0.2 0 0 0 1.3 1.3 0 0 0 0 0.1 0.1 0.1 0.1 0 0
Ref No. IC1009
MODE 21 22 23 24 25 26 27 28
CD PLAY 0 5.0 0 2.6 2.6 2.6 0 2.5
STANDBY 0 0.1 0 0.1 0.1 0.1 0 0.1
Ref No. IC1010
MODE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
CD PLAY 2.5 0 2.6 2.6 2.6 3.3 0 3.3 0 3.3 0 0 0 3.3 1.2 1.6 1.6 1.7 3.3 0
STANDBY 0.1 0 0.2 0.2 0.2 0 0 0 1.3 1.3 0 0 0 0 0.1 0.1 0.1 0.1 0 0
Ref No. IC1010
MODE 21 22 23 24 25 26 27 28
CD PLAY 0 5.0 0 2.6 2.6 2.6 0 2.5
STANDBY 0 0.1 0 0.1 0.1 0.1 0 0.1
Ref No. IC1011
MODE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
CD PLAY 2.5 0 2.6 2.6 2.6 3.3 0 3.3 0 3.3 0 0 0 3.3 1.2 1.6 1.6 1.7 3.3 0
STANDBY 0.1 0 0.2 0.2 0.2 0 0 0 1.3 1.3 0 0 0 0 0.1 0.1 0.1 0.1 0 0
Ref No. IC1011
MODE 21 22 23 24 25 26 27 28
CD PLAY 0 5.0 0 2.6 2.6 2.6 0 2.5
STANDBY 0 0.1 0 0.1 0.1 0.1 0 0.1
Ref No. QR1001 QR1002 QR1003
MODE E C B E C B E C B
CD PLAY 5.0 0.3 5.0 0 4.6 0 0 2.9 0
STANDBY 0.9 0 0.9 0 0.1 0 0 0.1 0




31
SA-XR55P / SA-XR55PC

9.1.2. Main P.C.B.
MAIN P.C.B.
Ref No. IC6001
MODE 1 2 3 4 5
CD PLAY 15.0 15.0 0 12.0 1.0
STANDBY 0.1 0.1 0 0 0
Ref No. IC6051
MODE 1 2 3 4 5 6 7 8
CD PLAY 0 0 0 -15.1 0 0 0 15.2
STANDBY 0.1 0.1 0 0.1 0 0.1 0.1 0.1
Ref No. IC6082
MODE 1 2 3 4 5 6 7 8
CD PLAY 0 0 0 -15.1 0 0 0 15.2
STANDBY 0 0 0 0.1 0 0 0 0.1
Ref No. IC6101
MODE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
CD PLAY 0 0 3.3 0 0 0 0 1.2 1.8 1.6 1.6 3.3 1.6 1.6 1.6 1.6 3.3 1.6 1.6 3.4
STANDBY 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Ref No. IC6101
MODE 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
CD PLAY 2.3 3.3 3.3 0 0 0 1.2 3.3 0 12.0 10.6 10.6 10.1 5.3 0 5.1 10.6 15.4 10.1 5.3
STANDBY 0 0 0 0 0 0 0 0 0 0 0 0 0.4 0 0 0.4 0 0 0.4 0
Ref No. IC6101
MODE 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56
CD PLAY 0 5.1 10.6 15.4 10.1 12.0 0 5.1 10.6 15.4 10.1 5.3 0 5.1 12.0 0
STANDBY 0 0.4 0 0 0.3 0 0 0.3 0 0 0.3 0 0 0.4 0 0
Ref No. IC6201
MODE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
CD PLAY 0 0 3.3 0 0 0 0 1.2 1.8 1.6 1.6 3.3 1.6 1.6 1.6 1.6 3.3 1.6 1.6 3.4
STANDBY 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Ref No. IC6201
MODE 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
CD PLAY 2.3 3.3 3.3 0 0 0 1.2 2.3 0 12.0 10.6 10.6 10.1 5.3 0 5.1 10.6 15.4 10.1 5.3
STANDBY 0 0 0 0 0 0 0 0 0 0 0 0 0.4 0 0 0.4 0 0 0.4 0
Ref No. IC6201
MODE 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56
CD PLAY 0 5.1 10.6 15.4 10.1 12.0 0 5.1 10.6 15.4 10.1 5.3 0 5.1 12.0 0
STANDBY 0 0.4 0 0 0.3 0 0 0.3 0 0 0.3 0 0 0.4 0 0
Ref No. IC6301
MODE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
CD PLAY 0 0 3.3 0 0 0 0 1.2 1.8 1.6 1.6 3.3 1.6 1.6 1.6 1.6 3.3 1.6 1.6 3.4
STANDBY 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Ref No. IC6301
MODE 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
CD PLAY 2.3 3.3 3.3 0 0 0 1.2 3.3 0 12.0 10.6 10.6 10.1 5.3 0 5.1 10.6 15.4 10.1 5.3
STANDBY 0 0 0 0 0 0 0 0 0 0 0 0 0.4 0 0 0.4 0 0 0.4 0
Ref No. IC6301
MODE 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56
CD PLAY 0 5.1 10.6 15.4 10.1 12.0 0 5.1 10.6 15.4 10.1 5.3 0 5.1 12.0 0
STANDBY 0 0.4 0 0 0.3 0 0 0.3 0 0 0.3 0 0 0.4 0 0
Ref No. IC6401
MODE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
CD PLAY 0 0 3.3 0 0 0 0 1.2 1.8 1.6 1.6 3.3 1.6 1.6 1.6 1.6 3.3 1.6 1.6 3.4
STANDBY 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Ref No. IC6401
MODE 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
CD PLAY 2.3 3.3 3.3 0 0 0 1.2 3.3 0 12.0 10.6 10.6 10.1 5.3 0 5.1 10.6 15.4 10.1 5.3
STANDBY 0 0 0 0 0 0 0 0 0 0 0 0 0.4 0 0 0.4 0 0 0.4 0
Ref No. IC6401
MODE 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56
CD PLAY 0 5.1 10.6 15.4 10.1 12.0 0 5.1 10.6 15.4 10.1 5.3 0 5.1 12.0 0
STANDBY 0 0.4 0 0 0.3 0 0 0.3 0 0 0.3 0 0 0.4 0 0
Ref No. IC6601
MODE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
CD PLAY 0 0 1.8 3.3 2.2 0 0 0 0 0.8 0 3.1 3.3 3.1 3.1 3.1 3.1 0 0 0
STANDBY 0 0 0.4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Ref No. IC6601
MODE 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
CD PLAY 0 0 0 0 3.0 1.2 0 1.2 0 1.7 1.6 3.1 0 0 0 0 0 0 0 0
STANDBY 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Ref No. IC6601
MODE 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60
CD PLAY 1.7 1.7 3.3 1.7 1.7 1.7 1.7 3.3 1.6 1.6 1.6 1.6 3.3 1.6 1.6 0 3.3 0 3.3 0
STANDBY 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Ref No. IC6601
MODE 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80
CD PLAY 1.6 1.6 3.3 1.6 1.6 1.6 1.6 3.3 1.6 1.6 1.6 1.7 3.3 1.6 1.6 0 0 3.3 0 3.3
STANDBY 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Ref No. IC6602
MODE 1 2 3 4 5 6 7 8 9 10 11 12 13 14
CD PLAY 3.3 1.6 1.7 3.3 1.6 1.7 0 1.7 1.7 3.3 1.7 1.7 3.3 3.3
STANDBY 0.1 0.1 0 0.1 0.1 0.1 0 0 0.1 0.1 0 0.1 0.1 0
Ref No. IC6603
MODE 1 2 3 4 5
CD PLAY 0 0 0 5.1 5.1
STANDBY 0 0 0 0.9 0.9




32
SA-XR55P / SA-XR55PC

Ref No. IC6671
MODE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
CD PLAY 3.3 1.2 0 1.2 - 1.7 1.6 1.6 0 0 0 1.6 1.7 1.8 - 1.2 0 1.2 0 3.3
STANDBY 0 0 0 0 0 1.1 1.1 1.1 0 0 2.7 0 0 2.9 0 0 0 0 0 0
Ref No. IC6701
MODE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
CD PLAY 0 0 1.8 3.3 2.2 0 0 0 0 0.8 0 3.1 3.3 3.1 3.1 3.1 3.1 3.1 0 0
STANDBY 0 0 0.4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Ref No. IC6701
MODE 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
CD PLAY 0 0 0 0 3.0 - - 1.2 0 1.7 1.6 3.1 0 0 0 0 0 0 0 0
STANDBY 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0