Matsushita Electric SE-HD550 User manual

AD0104081C3
Amplifier
SE-HD550
Colour
(N)...........GoldType
Area
(GN).........Oceania.
SPECIFICATIONS
2001 Matsushita ElectricIndustrial Co., Ltd. All rights reserved.
Unauthorized copying and distribution isaviolation of law.
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1. Before Repair
1. Turn off the power supply. Using a10 , 10 Wresistor, connect
both ends of power supplycapacitors (C601, C602) inorder to
discharge the voltage.
2. Before turning the power supplyon, after completion of repair,
slowlyapplythe primaryvoltage byusing apower supplyvoltage
controller to make sure that the consumed current at 50 HzinNO
SIGNALmode shouldbe shownbelow with respectto supply
voltage 240 V.
Powersupply
voltage AC 240 V
Consumedcurrent
50 Hz 50 - 180 mA
2. Protection Circuitry
The protection circuitrymayhave operatedif eitherof the following conditions is noticed:
-Nosound isheard when the power issupplied.
-Sound stops during aperformance.
The functions of this circuitryis toprevent circuitrydamage if, forexample, the positive and
negative speakerconnection wires are shorted, orif speakersystems withanimpedance less
thanthe indicatedratedimpedance of this unit are used.
If this occurs, followthe procedure outlinedbellow:
1. Press the Standby/on button, switch to standbymode.
2. Determine the cause of the problem and correct it.
3. Press the Standby/on button once again, supplythe power.
Note:
When the protection circuitryfunctions, the unitwill not operate
unless the Standby/on button isfirst switched Standbyand then
ONagain.
3. Accessories
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-AC power supplycord
(RJA0035-X)...........................................1pc.
-AMloop antenna set
(RSA0033B)..............................................1pc.
-FM indoor antenna
(RSA0006-J).............................................1pc.
-Speaker cords
(REE1057) (Red, Black).........................2pcs.
(REE0853) (Blue, Gray)..........................2pcs.
-Remote control transmitter
(EUR7702010).........................................1pc.
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-Remote control batteries
(R6/LR6, AA, UM-3)..................................2pcs.
Note: These are availableon sales route.
4. Location of Controls
5. Operation Checks and Component Replacement /
Procedures
-Thissection describes procedures for checking the operation of
the major printed circuitboards and replacing the main
components.
-For reassemblyafter operation checks or replacement, reverse the
respective procedures. Special reassemblyprocedures are
described onlywhen required.
5.1. Checking for the power supplyP.C.B.
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-Check the power supplyP.C.B. as shownbelow.
5.2. Checking for the operation P.C.B.
-Follow the (Step 1) -(Step 3) of item 5.1.
-Check the operation P.C.B. as shownbelow.
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5.3. Checking for the mainP.C.B.
-Follow the (Step 1) -(Step 3) of item 5.1.
-Check the mainP.C.B. as shownbelow.
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5.4. Replacement for the power IC
-Follow the (Step 1) -(Step 3) of item 5.1.
-Follow the (Step 1) -(Step 3) of item 5.3.
6. To Supply Power Source and Signal Check
To operate this unit SE-HD550 normally, it is necessarytoconnect tothe unit ST-HD550. When
operating the unit SE-HD550, be sure toconnect tothe unit ST-HD550 byconnection cable.
1. Connect with the Tuner (ST-HD550). Refer to Fig. 6-1.
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2. Connect the AC power supplycord to the Amplifier / (SE-HD550).
Refer to Fig. 6-1.
3. Connect the speakers to speaker terminal. / Refer to Fig. 6-1.
4. Turn on the power of the Amplifier (SE-HD550).
5. Set INPUTSELECTERto select the external source (EXT) of the
Amplifier (SE-HD550).
6. Input asound signal to external input terminal of the Tuner (ST-
HD550), and confirm to be outputted from the speaker. (Both High
and Low.)
Fig. 6-1.
7. Schematic Diagram Notes
-Thisschematicdiagram maybe modified at anytime with the
development of new technology.
Notes:
S501:
Power standby/on switch ( /I)
S503:
Bass downswitch (BASS )
S504:
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Bass up switch (BASS )
S505:
VGCA (variablegaincontrol amplifier) switch (VGCA)
S506:
Trebledownswitch (TREBLE )
S507:
Trebleup switch (TREBLE )
VR501:
Input selector VR(INPUTSELECTOR)
VR502:
Volume control VR(VOLUME)
-Indicated voltage values are the standard values for the unit
measured bythe DC electroniccircuittester (high-impedance)
with the chassistaken as standard. Therefore, there mayexist
some errors inthe voltage values, depending on theinternal
impedance of the DC circuittester.
Nomark
:Power ON
-Important safetynotice:
Components identified bymark have special characteristics
important for safety.
Furthermore, special parts which have purposes of fire-retardant
(resistors), high-qualitysound (capacitors), low-noise (resistors),
etc. are used.
When replacing anyof components, be sure to use only
manufacturer’sspecified parts showninthe parts list.
-The supplypart number isdescribed alone inthe replacement
parts list.
-Caution!
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ICand LSI are sensitive to staticelectricity.
Secondarytroublecan be prevented bytaking care during repair.
Cover the parts boxes made of plastics with aluminum foil.
Ground the soldering iron.
Put aconductive mat on the work table.
Donot touch the legs of ICor LSI with the fingers directly.
-Voltage and signal line
:Positive voltage line
:Negative voltage line
:Audiosignal line
8. Schematic Diagram
9. Printed Circuit Board Diagram
10. Type Illustration of ICs, Transistors and Diodes
11. Wiring Connection Diagram
12. Block Diagram
13. Replacement Parts List
Notes:
-Important safetynotice:
Components identified bymark have special characteristics
important for safety.
Furthermore, special parts which have purposes of fire-retardant
(resistors), high-qualitysound (capacitors), low-noise (resistors),
etc. are used.
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