Panasonic SA-PT750PL User manual

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OGENERAL
Power Supply:
A
C 120 V, 60 Hz
Power Consumption: 131 W
Dimensions (W×H×D): 430×75×424 mm
Mass: Main unit 5 kg
Operating Temperature Range: +5°C to +35°C
Operating Humidity Range: 5% to 90% RH (no
condensation)
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OAMPLIFIER SECTION
RMS Output Power: Dolby Digital Mode
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OTotal RMS Dolby Digital mode power:
1000 W
At 1 kHz and total harmonic of 10%
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OFront Ch: 125 W / Channel (3 Ω)
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OCenter Ch: 250 W / Channel (6 Ω)
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OSurround Ch: 125 W / Channel (3 Ω)
At 100 Hz and total harmonic of 10%
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OSubwoofer Ch: 250 W / Channel (6 Ω)
FTC Output Power: Dolby Digital Mode
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OTotal FTC Dolby Digital mode power:
428 W
At 120 Hz - 20 kHz and total harmonic of 1%
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OFront Ch: 63 W / Channel (3 Ω)
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OCenter Ch: 113 W / Channel (6Ω)
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OSurround Ch: 34 W / Channel (3Ω)
© 2007 Matsushita Electric Industrial Co., Ltd. All
rights reserved. Unauthorized copying and
distribution is a violation of law.
SA-PT750PL
Colour
(K).......................Black Type
At 45 Hz - 120 Hz and total harmonic of 1%
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OSubwoofer Ch: 121 W / Channel (6Ω)
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OFM/AM TUNER, TERMINALS SECTION
Preset Memory: FM 30 stations
AM / MW 30 stations
Frequency Modulation (FM)
Frequency range: 87.9-107.9 MHz
(200-kHz step)
87.5-108.0 MHz
(100-kHz step)
Sensitivity: 1.8 µV (IHF)
S/N 26 dB: 1.4 µV
Antenna terminals: 75 Ω(unbalanced)
Amplitude Modulation (AM/MW):
Frequency range: 520-1710 kHz (10-kHz step)
AM Sensitivity S/N 20 dB at
1000 kHz: 560 µV/m
Phone Jack:
Terminal: Stereo, 3.5 mm jack
Music Port (Front):
Sensitivity: 100 mV, 1.2 kΩ
Terminal (Input): Stereo, 3.5 mm jack
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ODISC SECTION
Discs played [8 cm or 12 cm]:
(1) DVD (DVD-Video)
DVD Home Theater Sound System
Specifications
ORDER NO. MD0706006CE

(2) DVD-RAM [DVD-VR, MP3 (*2, 5), JPEG (*4, 5)]
(3) DVD-R [DVD-Video, DVD-VR, MP3 (*2, 5), JPEG (*4, 5)]
(4) DVD-R DL (DVD-Video, DVD-VR)
(5) DVD-RW [DVD-Video, DVD-VR, MP3 (*2, 5), JPEG (*4, 5)]
(6) +R, +RW (Video)
(7) +R DL (Video)
(8) CD, CD-R/RW [CD-DA, Video CD, SVCD (*1), MP3 (*2, 5),
WMA (*3, 5), JPEG (*4, 5), HighMAT Level 2 (Audio and
Image)]
*1 Conforming to IEC62107
*2 MPEG-1 Layer 3, MPEG-2 Layer 3
*3 Windows Media Audio Ver.9.0 L3
ONot compatible with Multiple Bit Rate (MBR)
*4 Exif Ver 2.1 JPEG Baseline files
OPicture resolution: between 160 x 120 and 6144 x 4096
pixels (Sub sampling is 4:0:0, 4:2:0, 4:2:2 or 4:4:4).
Extremely long and narrow pictures may not be displayed.
*5 The total combined maximum number of recognizable audio
and picture contents and groups: 4000 audio and picture
contents and 400 groups
Pick Up:
Wavelength:
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OCD: 785 nm
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ODVD: 662 nm
Laser power:
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OCD: CLASS 1M
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ODVD: CLASS 1
Audio Output (Disc):
Number of channels: 5.1 ch (FL, FR, C, SL, SR,
SW)
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OVIDEO SECTION
Video System: NTSC
Composite Video Output:
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OOutput level: 1 Vp-p (75 Ω)
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OTerminal: Pin jack (1 system)
Component Video Output (480p/480i):
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OY output level: 1 Vp-p (75 Ω)
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OPBoutput level: 0.7 Vp-p (75 Ω)
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OPRoutput level: 0.7 Vp-p (75 Ω)
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OTerminal: Pin jack (Y: green, PB: blue,
PR: red) (1 system)
HDMI AV Output:
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OTerminal: Type A connector (19-pin)
Power Consumption in Standby Mode:
approx. 0.5 W
Note:
1. Specifications are subject to change without notice.
Mass and dimensions are approximate.
2. Total harmonic distortion is measured by the digital spectrum
analyzer.
Solder:
This model uses lead free solder (PbF).
Mechanism:
This model uses RC1U (Rotary tray) mechanism.
Refer to the respective original service manuals for *1, *2, *3,
*4, *5, *6.
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SA-PT750PL

1 Safety Precautions 5
1.1. GENERAL GUIDELINES 5
1.2. Before Repair and Adjustment 5
1.3. Protection Circuitry 5
1.4. Safety Parts Information 6
2 Prevention of Electrostatic Discharge (ESD) to
Electrostatically Sensitive (ES) Devices 7
3 Precaution of Laser Diode 8
4 About Lead Free Solder (PbF) 9
4.1. Service caution based on legal restrictions 9
5 Handling Precautions for Traverse Unit 10
5.1. Cautions to Be Taken in Handling the Optical Pickup Unit
10
5.2. Grounding for electrostatic breakdown prevention 10
6 Accessories 12
7 Operation Procedures 13
7.1. Remote Control Key Buttons Operations 13
7.2. Main Unit Key Buttons Operations 14
7.3. Wireless Surround 15
7.4. Using the VIERA Link “HDAVI Control™” 16
7.5. Using the Music Port 17
7.6. Disc Information 18
8 New Features 20
8.1. About HDMI 20
8.2. Wireless Features 22
9 Self-Diagnosis and Special Mode Setting 29
9.1. Service Mode Summary Table 29
9.2. Service Mode Table (Main Unit) 29
9.3. Wireless Service Mode Summary Table 39
9.4. Service Mode Table (Wireless) 40
9.5. DVD Self Diagnostic Function-Error Code 42
9.6. Sales Demonstration Lock Function 44
9.7. Service Precautions 45
10 Assembling and Disassembling 47
10.1. Disassembly Flow Chart 49
10.2. Main Components and P.C.B. Locations 50
10.3. Disassembly of Top Cabinet 51
10.4. Disassembly of Tray Lid Assembly 51
10.5. Disassembly of Front Panel 51
10.6. Disassembly of Panel P.C.B. & Key P.C.B. 52
10.7. Dissassembly of Tray Base Assembly 52
10.8. Disassembly of Mechanism Base Assembly 53
10.9. Disassembly of Rear Panel 53
10.10. Disassembly of Wireless Adapter P.C.B. 54
10.11. Disassembly of Tray P.C.B. 54
10.12. Disassembly of D-Amp P.C.B 55
10.13. Disassembly of Digital Amp IC (IC5000) 55
10.14. Disassembly of DVD Module P.C.B. 56
10.15. Disassembly of Main P.C.B. 56
10.16. Disassembly of Regulator IC (IC2903) 57
10.17. Disassembly of SMPS & AC-Inlet P.C.B. 58
10.18. Disassembly of Switch Regulator IC (IC5701) 58
10.19. Disassembly of Regulator Diode (D5803) 59
10.20. Disassembly of Regulator Diode (D5801/D5802) 59
10.21. Disassembly of Regulator Diode (D5702) 60
10.22. Disassembly of Tray Guide (L) & Tray Guide (R) 60
10.23. Disassembly of Rotary Tray 61
10.24. Disassembly of Open Lock Gear 61
10.25. Disassembly of Close Lock Gear 61
10.26. Disassembly of Tray Motor P.C.B. 62
10.27. Disassembly of Sensor P.C.B. 62
10.28. Disassembly of Traverse Unit 62
10.29. Disassembly of Pulley Gear 63
10.30. Disassembly of Loading Motor P.C.B. 64
10.31. Disassembly of Drive Gear (A) & Drive Gear (B) 64
10.32. Disassembly of Magnet Holder, Washer, Magnet &
Clamper 64
10.33. Disassembly of Support Piece, Change Lever, Slide Plate
(L) & Slide Plate (R) 65
10.34. Disassembly of Cam Gear 66
10.35. Assembly of Tray Base Assembly 66
11 Service Fixture and Tools 68
12 Service Positions 68
12.1. Checking & Repair Panel P.C.B. & Key P.C.B. 68
12.2. Checking & Repair Main P.C.B. 68
12.3. Checking & Repair SMPS P.C.B. 69
12.4. Checking & Repair D-Amp P.C.B. 69
12.5. Checking & Repair DVD Module P.C.B. 70
13 Measurements and Adjustments 71
13.1. Service Tools and Equipment 71
13.2. Important points in adjustment 71
13.3. Storing and handling of test discs 71
13.4. Optical adjustment 72
14 Abbreviations 73
15 Voltage and Waveform Chart 75
15.1. DVD Module P.C.B. 75
15.2. Main P.C.B. 77
15.3. D-Amp P.C.B. 78
15.4. SMPS P.C.B. 78
15.5. Panel P.C.B. 78
CONTENTS
Page Page
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SA-PT750PL

15.6. Tray, Loading Motor, Tray Motor & Sensor P.C.B. 79
15.7. Waveform Chart 80
16 Illustration of IC’s, Transistors and Diodes 82
17 Wiring Connection Diagram 83
18 Block Diagram 85
18.1. System Control 85
18.2. DVD (Servo) 86
18.3. DVD (Video/Audio) 87
18.4. DVD Interface 88
18.5. Audio 89
18.6. Audio Digital Amp 90
18.7. Power 91
19 Schematic Diagram Notes 93
20 Schematic Diagram 95
20.1. DVD Module (DV5/HDMI) Circuit 95
20.2. Main Circuit & Panel 100
20.3. D-Amp & SMPS Circuit 105
20.4. Tray Circuit 109
20.5. Key, Wireless Adapter, AC-Inlet & Loading Motor Circuit
110
20.6. Tray Motor, Sensor & Optical Pickup Unit Circuit 111
21 Printed Circuit Board 113
21.1. DVD Module P.C.B. 113
21.2. Main P.C.B. 114
21.3. Panel, Key & Wireless Adapter P.C.B. 115
21.4. D-Amp P.C.B. 116
21.5. SMPS P.C.B. 117
21.6. AC-Inlet, Tray, Loading Motor, Tray Motor & Sensor
P.C.B. 118
22 Basic Troubleshooting Guide 119
22.1. Basic Troubleshooting Guide for Traverse Unit (DVD
Module P.C.B) 119
22.2. Basic Troubleshooting Guide for HDMI AV output 120
23 Overall Block Diagram for PT750 122
23.1. SC-PT750 Main Circuit Block 122
23.2. SC-PT750 SMPS Circuit Block 123
24 Terminal Function of ICs 124
24.1. IC2001 (C2CBYY000472): System Control IC 124
25 Exploded Views 125
25.1. Cabinet Parts Location 127
25.2. Packaging 129
26 Replacement Parts List 130
26.1. Component Parts List 131
27 Schematic Diagram for printing with letter size 144
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SA-PT750PL

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, carry out 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 5.2MΩ.
When the exposed metal does not have a return path to the chassis, the reading must be
1.1.2. LEAKAGE CURRENT HOT CHECK
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.
Figure 1
1.2. Before Repair and Adjustment
Disconnect AC power to discharge unit AC Capacitors as such C5700, C5701, C5703, C5704, C5705 through a 10 Ω,10W
resistor to ground.
Caution:
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, 60 Hz in NO SIGNAL mode volume minimal should be ~ 900 mA.
1.3. 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
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SA-PT750PL

“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.
1.4. Safety Parts Information
Safety Parts List:
There are special components used in this equipment which are important for safety.
These parts are marked by in the Schematic Diagrams & Replacement Parts List. It is essential that these critical parts
should be replaced with manufacturer’s specified parts to prevent shock, fire or other hazards. Do not modify the original design
without permission of manufacturer.
Table 1
Reference No. Part No. Part Name & Description Remarks
342 RAE2022Z-S DT6J TRAVERSE UNIT [M]
PC5701 B3PBA0000402 PHOTO COUPLER [M]
PC5702 B3PBA0000402 PHOTO COUPLER [M]
PC5720 B3PBA0000402 PHOTO COUPLER [M]
PC5799 B3PBA0000402 PHOTO COUPLER [M]
D5701 B0FBAR000041 DIODE [M]
DZ5701 ERZV10V511CS ZENER [M]
TH5701 D4CAA5R10001 THERMISTOR [M]
TH5860 D4CC11040013 THERMISTOR [M]
L2101 J0JBC0000015 CHIP INDUCTOR [M]
L2201 J0JBC0000015 CHIP INDUCTOR [M]
L2802 J0JBC0000015 CHIP INDUCTOR [M]
L2803 J0JBC0000015 CHIP INDUCTOR [M]
L2804 J0JBC0000015 CHIP INDUCTOR [M]
L2805 J0JBC0000015 CHIP INDUCTOR [M]
L5001 G0B9R5K00003 LINE CHOKE COIL [M]
L5002 G0B9R5K00003 LINE CHOKE COIL [M]
L5201 G0B9R5K00003 LINE CHOKE COIL [M]
L5301 G0B9R5K00003 LINE CHOKE COIL [M]
L5500 J0JKB0000020 EMI BEAD CORE [M]
L5501 J0JKB0000020 EMI BEAD CORE [M]
L5702 ELF22V035B COIL [M]
L5721 J0JKB0000020 EMI BEAD CORE [M]
T2900 G4D1A0000117 TRANSFORMER [M]
T5701 ETS42BM15GAD TRANSFORMER [M]
T5751 ETS19AB236AG TRANSFORMER [M]
F1 K5D802APA008 FUSE [M]
FP2902 K5H5012A0010 FUSE PROTECTOR [M]
P5701 K2AB2B000010 JACK AC INLET [M]
A2 K2CB2CB00021 AC CORD [M]
C5700 F1BAF1020020 1000P [M]
C5701 ECQU2A334MLA 0.33 [M]
C5703 ECQU2A224MLC 0.22 [M]
C5704 F1BAF1020020 1000P [M]
C5705 F1BAF1020020 1000P [M]
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SA-PT750PL

2 Prevention of Electrostatic Discharge (ESD) to
Electrostatically Sensitive (ES) Devices
Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called
Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and
semiconductor "chip" components. The following techniques should be used to help reduce the incidence of component damage
caused by electrostatic discharge (ESD).
1.Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any ESD on your
body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging ESD wrist strap,
which should be removed for potential shock reasons prior to applying power to the unit under test.
2.After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as
aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.
3.Use only a grounded-tip soldering iron to solder or unsolder ES devices.
4.Use only an anti-static solder removal device. Some solder removal devices not classified as "anti-static (ESD protected)" can
generate electrical charge sufficient to damage ES devices.
5.Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices.
6.Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most
replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or comparable
conductive material).
7.Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material
to the chassis or circuit assembly into which the device will be installed.
Caution:
Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.
8.Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the
brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD)
sufficient to damage an ES device).
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SA-PT750PL

3 Precaution of Laser Diode
CAUTION :
This product utilizes a laser diode with the unit turned on, invisible laser radiation is emitted from the pickup lens.
Wavelength : 662nm/785nm
Maximum output radiation power from pickup : 100µW/VDE
Laser radiation from pickup unit is safety level, but be sure the followings:
1.Do not disassemble the pickup unit, since radiation from exposed laser diode is dangerous.
2.Do not adjust the variable resistor on the pickup unit. It was already adjusted.
3.Do not look at the focus lens using optical instruments.
4.Recommend not to look at pickup lens for a long time.
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SA-PT750PL

4 About Lead Free Solder (PbF)
4.1. Service caution based on legal restrictions
4.1.1. General description about Lead Free Solder (PbF)
The lead free solder has been used in the mounting process of all electrical components on the printed circuit boards used for this
equipment in considering the globally environmental conservation.
The normal solder is the alloy of tin (Sn) and lead (Pb). On the other hand, the lead free solder is the alloy mainly consists of tin
(Sn), silver (Ag) and Copper (Cu), and the melting point of the lead free solder is higher approx.30 degrees C (86°F) more than that
of the normal solder.
Definition of PCB Lead Free Solder being used
The letter of “PbF” is printed either foil side or components side on the PCB using the lead free solder.
(See right figure)
Service caution for repair work using Lead Free Solder (PbF)
• • •
• The lead free solder has to be used when repairing the equipment for which the lead free solder is used.
(Definition: The letter of “PbF” is printed on the PCB using the lead free solder.)
• • •
• To put lead free solder, it should be well molten and mixed with the original lead free solder.
• • •
• Remove the remaining lead free solder on the PCB cleanly for soldering of the new IC.
• • •
• Since the melting point of the lead free solder is higher than that of the normal lead solder, it takes the longer time to melt
the lead free solder.
• • •
• Use the soldering iron (more than 70W) equipped with the temperature control after setting the temperature at 350±30
degrees C (662±86°F).
Recommended Lead Free Solder (Service Parts Route.)
• • •
• The following 3 types of lead free solder are available through the service parts route.
RFKZ03D01K-----------(0.3mm 100g Reel)
RFKZ06D01K-----------(0.6mm 100g Reel)
RFKZ10D01K-----------(1.0mm 100g Reel)
Note
* Ingredient: tin (Sn), 96.5%, silver (Ag) 3.0%, Copper (Cu) 0.5%, Cobalt (Co) / Germanium (Ge) 0.1 to 0.3%
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SA-PT750PL

5 Handling Precautions for Traverse Unit
The laser diode in the optical pickup unit may break down due to static electricity of clothes or human body. Special care must be
taken avoid caution to electrostatic breakdown when servicing and handling the laser diode in the traverse unit.
5.1. Cautions to Be Taken in Handling the Optical Pickup Unit
The laser diode in the optical pickup unit may be damaged due to electrostatic discharge generating from clothes or human body.
Special care must be taken avoid caution to electrostatic discharge damage when servicing the laser diode.
1.Do not give a considerable shock to the optical pickup unit as it has an extremely high-precise structure.
2.To prevent the laser diode from the electrostatic discharge damage, the flexible cable of the optical pickup unit removed should
be short-circuited with a short pin or a clip.
3.The flexible cable may be cut off if an excessive force is applied to it. Use caution when handling the flexible cable.
4.The antistatic FPC is connected to the new optical pickup unit. After replacing the optical pickup unit and connecting the flexible
cable, cut off the antistatic FPC.
5.2. Grounding for electrostatic breakdown prevention
Some devices such as the DVD player use the optical pickup (laser diode) and the optical pickup will be damaged by static
electricity in the working environment. Proceed servicing works under the working environment where grounding works is
completed.
5.2.1. Worktable grounding
1.Put a conductive material (sheet) or iron sheet on the area where the optical pickup is placed, and ground the sheet.
5.2.2. Human body grounding
1.Use the anti-static wrist strap to discharge the static electricity form your body.
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SA-PT750PL