Technics SX-PX554 User manual

ORDER NO. EMID0004007C0
A5
Digital Piano
SX-PX554 / SX-PX554M
(P) U.S.A.
(PC) Canada
(PY) Mexico
(EX) Norway, Sweden, Denmark, Finland, Spain, Portugal, Greece, South
Africa
(EZ) Germany
(EG) Switzerland, Italy, Austria, Holland, Belgium, France
(EB) the United Kingdom
(GN) Australia, New Zealand
(XS) Malaysia, Singapore
(XT) Taiwan
(X) Thailand, Columbia, Panama, Philippines
(XA) Argentina
(XD) Hong, Kong
SPECIFICATIONS
SPECIFICATIONS
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Digital Piano 1
SPECIFICATIONS 1
1. WARNING 3
2. SAFETY PRECAUTION 3
2.1. Safety precaution 3
2.2. Insulation resistance test 4
3. OWNERS MANUAL 4
4. HOW TO ASSEMBLE THE PIANO 4
5. KEYBOARD RANGES 6
6. PARTS LOCATION 7
7. DISASSEMBLY INSTRUCTIONS 7
7.1. Removing the top cover 7
7.2. Removing the keyboard cover 7
7.3. Removing the control panel 8
7.4. Removing the keyboard assembly 8
7.5. Key(s) 9
7.6. Disassembly of the pedal assembly 10
7.7. Removing the speakers 10
7.8. Removing the printed circuit boards 11
8. SELF-DIAGNOSTIC FUNCTIONS 12
9. PRECAUTIONS BEFORE SERVICING 14
9.1. Precautions for measuring of the output waveforms 14
9.2. Important safety notice 15
9.3. Symbolic marks 15
9.3.1. Resistors 15
Table-1 15
9.3.2. Capacitors 16
Table-2 16
10. MEASURING CONDITION 16
10.1. Measuring condition of MAIN P.C.B. 17
10.2. Measuring condition of FAJSP P.C.B. 17
11. SCHEMATIC DIAGRAM 18
12. PRINTED CIRCUIT BOARD 18
12.1. MAIN, FAJSP, CPL P.C.B. 18
12.2. CPR, MKB1, MKB2, PKB, COM, HP P.C.B. 18
13. BLOCK DIAGRAM 18
14. WIRING CONNECTION DIAGRAM 18
15. REPLACEMENT PARTS LIST 18
16. CABINET PARTS LOCATION 37
17. PACKAGING 40
svcdoc
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KEYBOARD 88 KEYS
MAX. POLYPHONY 64 NOTES
SOUND 18 SOUNDS: CONCERT
GRAND, POP GRAND,
UPRIGHT, E PIANO 1, E PIANO
2, HARPSI, VIBES, STRINGS,
VOCAL, ORGAN PRESETS
PEDAL SOFT, SOSTENUTO, SUSTAIN
BRILLIANCE MELLOW, BRIGHT (5 STEPS)
DIGITAL EFFECT Supported
DIGITAL REVERB Supported (ROOM, STAGE,
HALL, CONCERT)
TOUCH SENSITIVITY LIGHT, NORMAL, HEAVY
TRANSPOSE G - C - F#
TUNING 427.3Hz-440.0Hz-453.0Hz
METRONOME Supported (TIME SIGNATURE:
OFF, 2/4, 3/4, 4/4, 5/4, 6/8)
SEQUENCER TRACK (1, 2), STORAGE
CAPACITY: APPROX. 4500
NOTES, RECORDING MODE:
REAL TIME
DISPLAY Supported
DEMO Supported
MIDI MILTI TIMBRE, LOCAL
CONTROL, OMNI ON,
PROGRAM CHANGE, PEDAL,
EFFECT, TRANSPOSE
MODE SET PIANO TUNING, MINIMUM
RANGE
OTHERS POWER SWITCH, MAIN VOLME,
MIDI TERMINALS (IN, OUT),
PEDAL IN, AUX IN (R/R+L,L),
LINE OUT (R/R+L,L),
COMPUTER, HEADPHONES ×
2, AC IN, INITIAL KEY
OUTPUT 120 W (60 W × 2)
SPEAKERS 14 cm × 2, 6.5 cm × 2
POWER REQUIREMENT 160 W
AC 120V/220/230-240 V 50/60Hz
/ AC 120V 60Hz (NORTH
AMERICA AND MEXICO) /
AC230-240 V 50/60Hz
(EUROPE, AUSTRALIA AND
NEWZEALAND)
DIMENSIONS (W×H×D) 138.7 cm × 106.4 cm × 52 cm (54
-19/32” x 41-7/8” x 20-15/32”)
NET WEIGHT 56 kg (123.5 lbs.)
ACCESSORIES AC CORD
2000 Matsushita Electric Industrial Co., Ltd. All rights reserved.
Unauthorized copying and distribution is a violation of law.
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1. WARNING
To prevent the risk of fire, smoke, or electrical shock and to ensure safe operation, please be sure to
follow the safety guidelines below.
1. At places where special caution is required, the necessary safety
precautions are clearly labeled or printed, for example, on the cabinet,
or on the part concerned. Please follow these safety precautions, and
also those listed in the Owner's Manual.
2. Parts which have a mark in the circuit diagram or in the parts list
are essential for safety. When replacing these parts, be sure to use
only the specified parts.
3. Use the specified types for internal wiring (double-insulated wiring,
etc.).
4. When replacing parts on the AC primary side (power transformer,
electric switch, electrical cord, noise-prevention condenser, etc.), wind
the lead wire and secure it by soldering.
5. Do not let the wiring come into contact with heat-emitting devices
(fuse resistor, radiator plate, etc.).
6. When replacing the wiring, make sure that it is not in contact with the
unfinished or rough edge of a part.
7. When replacing the power cord (except for the plug-in type), tug it
from various directions to confirm that it does not slip out of place.
8. Spacing
If soldering was done on the AC primary circuit, confirm that the
interval between the soldered terminals or between the terminal and
surrounding metallic parts is at least the minimum required (between
the primary circuit and the chassis: at least 6.5 mm; between primary
circuit terminals: at least 4.0 mm; between primary circuit terminals
and secondary circuit terminals: at least 6.5 mm.).
2. SAFETY PRECAUTION
2.1. Safety precaution
1. Before servicing, unplug the power cord to prevent an electric shock.
2. When replacing parts, use only the manufacturer’s recommended
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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.
2.2. Insulation resistance test
1. Unplug the power cord and short the prongs of the plug with a jumper
wire.
2. Turn on the power switch.
3. Measure the resistance value with an ohmmeter between the jumpered
AC plug and each exposed metal cabinet part, such as screw heads,
connectors, control shafts, handle brackets, etc. Measurements
should range from 4 M Ohm to infinity for all exposed parts.
Figure-1
3. OWNERS MANUAL
4. HOW TO ASSEMBLE THE PIANO
To prevent the piano unit from falling off the stand, secure it firmly with the screws.
1. Assemble the right and left planks
- Assemble the right and left planks to the pedal box with the 4 brass-
colored screws.
- Loosen the pedal cord, stowed on the inner side of the pedal box, and
extend it.
Figure-2
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2. Place the stand uplight and mount the panel
- Place the stand upright and mount the rear panel with 2 black screws A
and 4 black screws B.
- Run the screws directly into the pedal box as there are no rough holes
in the pedal box.
Figure-3
3. Place the piano body
- Place the piano body on the stand and secure it with 4 black screws A.
Figure-4
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4. Connect the pedal cord and power cord
- Connect the pedal cord and power cord to the terminals located on the
rear of the piano unit as shown below.
- Secure the pedal cord to the clamps as shown in the figure.
Figure-5
5. KEYBOARD RANGES
This keyboard features Touch Response, by which you control the volume by playing the keys harder
or softer.
Figure-6
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6. PARTS LOCATION
Figure-7
7. DISASSEMBLY INSTRUCTIONS
7.1. Removing the top cover
1. Remove the top cover mounting screws (A 4 pcs.) as shown in Figure-
8.
2. Slide the top cover forward and lift up (as shown by the arrows).
7.2. Removing the keyboard cover
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1. Remove the top cover (see step “Removing the top cover”).
2. Match the gears of the keyboard cover with the notches in the guide
rail, and lift up the keyboard cover as shown in Figure-8.
Figure-8
7.3. Removing the control panel
- Pull out the connectors on the control panel.
1. Remove the keyboard cover (see step “Removing the keyboard cover
”).
2. Remove the control panel mounting screws (A 2 pcs. and B 1 pc.) as
shown in Figure-9.
3. Slide the control panel forward and pull out (as shown by the arrow).
Figure-9
7.4. Removing the keyboard assembly
1. Remove the control panel (see step “Removing the control panel).
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2. Remove the keyboard assembly mounting screws located on the
bottom of the cabinet (A 10 pcs.) as shown in Figure-10.
Figure-10
7.5. Key(s)
Disassembly
1. Remove the keyboard assembly (see step “Removing the keyboard
assembly”).
2. While inserting a thin plate to press down a claw, push the rear of the
key forward to disengage the key claw from the chassis.
3. Lift the key up to remove it.
Note:
- The key claw is easily broken. Do not apply undue force. Should a key
claw break, it can still be used.
- If a black key is to be replaced, it is necessary to remove both adjacent
white keys.
Figure-11
/ / / /
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Assembly
1. Insert the front part of the key into the chassis.
2. Insert the plate spring into the hammer notch as shown in Figure -12.
3. While slowly lowering the key into the chassis, insert the plate spring
into the notch at the rear of the key.
4. Carefully insert the key into the opening in the chassis and slide the
key towards the rear to lock it in place.
Figure -12
7.6. Disassembly of the pedal assembly
1. Remove the pedal assembly from the pedal box.
2. Disassemble the pedal assembly as shown in Figure-13.
Figure-13
7.7. Removing the speakers
Remove the top cover (see step “Removing the top cover”).
Speaker box
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- Remove the speaker box mounting screws (A 4 pcs. each).
Speakers (14 cm)
- Remove the speakers mounting screws (B 4 pcs. each).
Speakers (6.5 cm)
- Remove the speakers mounting screws (C 4 pcs. each).
Figure-14
7.8. Removing the printed circuit boards
- Remove the top cover (see step “Removing the top cover”).
- Pull out the connectors on the printed circuit boards.
MAIN P.C.B.
1. Remove the ground wire holding screws (A 1pc.).
2. RElease the claws of the 5 P.C.B. holders.
FJASP P.C.B.
1. Remove the FJASP P.C.B. mounting screws (B 2 pcs. and C 2 pcs.).
2. Release the claws of the 3 P.C.B. holders.
COM P.C.B.
1. Remove the COM P.C.B. mounting screws (D 1 pc.).
2. Release the claws of the 2 P.C.B. holders.
HP P.C.B.
1. Remove the keyboard assembly (see step “Removing the keyboard
assembly”).
2. Remove the headphone jack mounting nuts (E 2 pcs.).
3. Remove the ground wire holding screw (F 1 pc.).
4. Remove the HP P.C.B. mounting screws (G 2 pcs.)
CPL P.C.B
1. Remove the control panel (see step “Removing the control panel”).
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2. Pull the MAIN VOLUME knob.
3. Remove the CPL P.C.B. mounting screws (H 10 pcs., I 3pcs., J 1 pc.,
and K 1 pc.).
CPR P.C.B.
1. Remove the control panel (see step “Removing the control panel”).
2. Remove the CPR P.C.B. mounting screws (M 10 pcs., L 3pcs., J 1 pc.,
and K 1 pc.).
Figure-15
Figure-16
8. SELF-DIAGNOSTIC FUNCTIONS
This model has some self-diagnostic capabilities. When set to the self-diagnostic mode, operation of
various components can be verified by following the procedures in the chart below.
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PCB TEST MODE Procedure
MAIN RAM (IC8,9), ROM
(IC6) check
1. Connect the CHECKING DEVICE to CN9 on the MAIN P.C.B., and turn on the CHECKING DEVICE s
w
2. Turn on the power switch.
CPL CPU (IC1) check 1. Connect the CHECKING DEVICE to CN9 on the MAIN P.C.B. (the Checking Device switch should be
2. Press and hold the two D keys shown below, and then turn on the power switch.
When the power switch is turned on, the LED of the CHECKING DEVIC
E
flashes 8 times. The first 4 flashes are for the RAM check, and the later
flashes are for the ROM check. The order of the LED flashes correspon
d
the respective IC numbers as shown below. If an IC is defective, the
corresponding flash time is longer.
Connection between serving CHECKING DEVICE and MAIN P.C.B.
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PCB TEST MODE Procedure
MAIN Wave ROM check
MAIN: IC12, IC18
1. Press and hold the two E keys shown below, and then turn on the power switch.
2. Select the POP GROUND sound.
3. Reduce the MAIN VOLUME level low enough.
When set to the self-diagnostic mode, the Wave ROM outputs a sine w
a
The Wave ROMs correspond to the keyboard keys as shown in the
diagram to the right. When a key is pressed, the corresponding sine w
a
sound is produced. If no sound is produced, or if the sound is distorte
d
the Wave ROM corresponding to that key is defective. This method all
o
to diagnose also the output routes (L/R) from the Wave ROM.
-The key number indicates the Wave ROM number.
(I-1: IC12, I-2: IC18)
CPL
CPR
Control Panel buttons
LED lighting check
Press and hold the two F keys shown below, and then turn on the pow
e
switch.
Press the buttons on the control and confirm that the corresponding L
E
light.
Control Panel LED
display check
Press and hold the two G keys shown below, and then turn on the pow
e
switch.
The numbers are displayed automatically and repeatedly on the displa
y
MKB Keyboard ROM (IC1)
check
Press and hold the two A keys shown below, and then turn on the pow
e
switch.
If the keyboard ROM (IC1) is OK, only the TOUCH SENSITIVITY LIGHT
L
flashes. If it is defective, the LEDs (LIGHT and NORMAL, or LIGHT,
NORMAL and HEAVY) flash.
9. PRECAUTIONS BEFORE SERVICING
9.1. Precautions for measuring of the output waveforms
1. The waveform was measured with a “National Digital Storage
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Oscilloscope VP-5730A”. Therefore the waveforms of musical tone
signals shown may differ somewhat due to the difference in the timing
of triggering.
2. Since the 1/10 test probe is used, the indicated voltage value on the
bottom part of each waveform illustration is 1/10 of the actual value
(e.g. 0.2 V/cm should be 2.0 V/cm).
3. To measure the waveforms, first set this unit to the service diagnostic
mode (refer to “Wave ROM check on SELF-DIAGNOSTIC FUNCTIONS”).
The WAVE ROM output will then be output as a sine wave to facilitate
the servicing check.
9.2. Important safety notice
- Components identified by a mark have special characteristics
important for safety.
- When replacing any of these components, use only manufacture’s
specified parts.
9.3. Symbolic marks
The symbolic marks for resistors and capacitors which used in this circuits are classified as following
Table-1 and Table-2.
9.3.1. Resistors
- Resistors without symbolic mark are FIXED CARBON FILM RESISTORS
(ERD-type).
- All resistors are 1/4 WATT, ±5 % TOLERANCE unless otherwise
designated in schematic diagrams.
Table-1
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SYMBOL SPECIFICATION
Fixed Carbon Film Resistors
“FLAME-PROOF” (ERD—F—type)
Fixed Wire Wound Resistors
“FLAME-PROOF” (ERF—type)
Fixed Metal Oxide Film Resistors
“FLAME-PROOF” (ERG—type)
Fixed Metal Film Resistors
“FLAME-PROOF” (ERX—type)
Fixed Metal Film Resistors (Precision and High Stability)
(ERO—type)
Fuse Type Fixed Metal Oxide Film Resistors
“FLAME-PROOF” (ERQ—type)
Fuse Type Fixed Carbon Film Resistors
“FLAME-PROOF” (ERD2FC—type)
9.3.2. Capacitors
- Capacitors without symbolic mark are POLYESTER CAPACITORS.
(ECQM-type, ECQG-type, ±10% Tolerance)
- Polarized capacitors without symbolic mark are Aluminum Electrolytic
Capacitors. (ECEA-type, ±20% Tolerance)
Table-2
SYMBOL SPECIFICATION TYPE
Non-Polarized Electrolytic
Capacitors
ECEA_KN_type
Non-Polarized Electrolytic (for
Network system)
ECEA_Y_type
Tantalum Solid Electrolytic
Capacitors
ECS_type
Metallized Plastic Film Capacitors
(TF Series)
ECQV_type
Temperature Compensating
Ceramic Capacitors
ECC_type
High-Dielecytric Constant Ceramic
Capacitors
ECK_type, ECR_type
Axial Lead Ceramic Capacitors ECB_type
Metallized Polyester Film
Capacitors for Across the Line
ECQ_EW_type
Aluminum Electrolytic Capacitors
for Smoothing Circuit
ECES_type
Multilayer Ceramic Chip
Capacitors
ECUV_type
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10. MEASURING CONDITION
10.1. Measuring condition of MAIN P.C.B.
Check Point 2 - 9
Set to the Self-diagnostic Mode followings.
- While pressing two E keys simultaneously, turn on the power switch.
- SOUND: CONCERT GRAND
- MAIN VOLUME: Max.
- Keyboard: A1
Check Point 1
Set to the Initial mode (refer to “OWNERS MANUAL”).
10.2. Measuring condition of FAJSP P.C.B.
Check Point 3 - 8
Set to the Self-diagnostic Mode followings.
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- While pressing two E keys simultaneously, turn on the power switch.
- SOUND: CONCERT GRAND
- MAIN VOLUME: Max.
- Keyboard: A1
Check Point 1,2
Set to the Initial mode (refer to “OWNERS MANUAL”).
11. SCHEMATIC DIAGRAM
12. PRINTED CIRCUIT BOARD
12.1. MAIN, FAJSP, CPL P.C.B.
12.2. CPR, MKB1, MKB2, PKB, COM, HP P.C.B.
13. BLOCK DIAGRAM
14. WIRING CONNECTION DIAGRAM
15. REPLACEMENT PARTS LIST
Notes:
*Important safety notice:
Components identified by mark have special characteristics important for safety.
Furthermore, special parts which have purposes of fire-retardant (resistors), high-quality sound
(capacitors), low-noise (resistors), etc. are used.
When replacing any of components, be sure to use only manufacture’s specified parts shown in the
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parts list.
*Warning: This product uses a laser diode. Refer to caution statements.
*ACHTUNG: Die lasereinheit nicht zerlegen. Die lasereinheit darf nur gegen einc vom hersteller
spezifizierte einheit ausgetauscht werden.
*Capacity values are in microfarads (uF) unless specified otherwise. P=Pico-farads (pF), F=farads (F)
*Resistance values are in ohms, unless specified otherwise. 1K=1,000 (OHM), 1M=1,000K (OHM)
*The marking <RTL> indicates that the Retention Time is limited for this item. After the
discontinuation of this assembly in production, the item will continue to be available for a specific
period of time. The retention period of availability is dependant on the type of assembly, and in
accordance with the laws governing part and product retention. After the end of this period, the
assembly will no longer be available.
*”<IA>”-”<IH>” marks in Remarks indicate languages of instruction manuals. [<IA>: Dansk, <IB>:
English, <IC>: English, <ID>: French, <IE>: Germany, <IF>: Italiano, <IG> : Espanol, <IH>: Nederlands]
*MAIN, FAJSP, CPL, CPR, MKB1, MKB2, COM and HP in Remarks indicate the Circuits and P. C. B.s. If
the same Ref. No. is found in the replacement parts list, check those indications in the Remarks.
Ref. No. Part No. Part Name & Description Pcs Remarks
1QAQG032AAK SOUND LOOPHOLE BOARD 1
2QGPG0136BA CONTROL PANEL 1
3SBNG7050A KNOB 1
4QMFG1107AA FELT(RED) 1
5QGPG0106AA LED PANEL 1
6QMRG5229AA CUSHION 1
7QMRG5230AA CUSHION 1
8QGPG0123DA BUTTON 1
9QGPG0124AB BUTTON 1
10 QMCG004AA SPACER 9
11 QKSGG030AAK GUIDE 1
12 QKSGG031AAK GUIDE 1
13 SJS9231A AC INLET COVER 1EXCEPT P, PC, PY
13 SJS9334A AC INLET COVER 1P, PC ,PY ONLY
14 QMRG5155AAK CUSHION 4
15 QMRG5206AA CUSHION 1
16 SHRG1230A CORD CLAMPER 1
17 QLZG021A CORE 3
18 QMRG7086AA LID,GUIDE 2
19 QYKG261AAZ CABINET ASS'Y 1
19 QYKG261ABZ CABINET ASS'Y 1 SX-PX554M
20 QMFG1083AB FELT 1
21 SBLG7-2 STAY 1
22 QKQGN926AAZ MUSIC STAND 1
22 QKQGN926ABZ MUSIC STAND 1 SX-PX554M
23 SBHG5003-2 HINGE 2
24 QKQGA142ACZ TOP COVER ASS'Y 1
24 QKQGA142ADZ TOP COVER ASS'Y 1 SX-PX554M
24-1 QMFG1274AA FELT 1
24-2 SGBG160B BADGE 1
25 QKQGF037BAZ KEYBOARD COVER ASS'Y 1
25 QKQGF037BEZ KEYBOARD COVER ASS'Y 1 SX-PX554M
25-1 QMRG7098AA HOLDER 2
25-2 QWBG002AA HOLDER 1
25-3 QXQG007AA AXLETREE 1
25-4 QGKG0154AA ORNAMENT 1
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