Panasonic SA-XH20PH User manual

© Panasonic Corporation 2012. All rights reserved.
Unauthorized copying and distribution is a violation
of law.
PSG1204015CE
DVD Home Theater Sound System
Model No. SA-XH20PH
Product Color: (K)...Black Type
TABLE OF CONTENTS PAGE PAGE
1 Safety Precautions----------------------------------------------- 3
1.1. General Guidelines---------------------------------------- 3
1.2. Before Repair and Adjustment------------------------- 4
1.3. Protection Circuitry---------------------------------------- 4
1.4. Caution For Fuse Replacement------------------------ 4
1.5. Safety Part Information----------------------------------- 5
2 Warning-------------------------------------------------------------- 6
2.1. Prevention of Electrostatic Discharge (ESD)
to Electrostatic Sensitive (ES) Devices -------------- 6
2.2. Precaution of Laser Diode------------------------------- 7
2.3. Service caution based on Legal restrictions-------- 8
2.4. Handling Precautions for Traverse Unit-------------- 9
3 Service Navigation----------------------------------------------11
3.1. Service Information --------------------------------------11
4 Specifications ----------------------------------------------------12
4.1. Others (Licences)-----------------------------------------13
5 General/Introduction-------------------------------------------14
5.1. Power-Saving Features --------------------------------14
5.2. Disc Information------------------------------------------15
5.3. DivX Information------------------------------------------17
6 Location of Controls and Components------------------18
6.1. Remote Control Key Button Operations------------ 18
6.2. Main Unit Key Button Operations-------------------- 19
7 Installation Instructions --------------------------------------20
7.1. Speaker Connections -----------------------------------20
7.2. Radio Antenna Connection----------------------------21
8 Operating Instructions----------------------------------------22
8.1. Removing of disc during abnormality --------------- 22
9 Service Mode-----------------------------------------------------24
9.1. Cold-Start -------------------------------------------------- 24
9.2. Panel Code Setting Operation------------------------24
9.3. Self Diagnostic-------------------------------------------- 27
Note: Please refer to the original service manual for:
ODVD Mechanism Unit (BRS1D), Order No. PSG1012001CE
OSpeaker system SB-XH70GS-K, Order No. PSG1202009CE

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9.4. Error Code -------------------------------------------------32
9.5. Sales Demonstration Lock Function ----------------34
9.6. Firmware Version-Up Information--------------------35
10 Troubleshooting Guide----------------------------------------37
10.1. Troubleshooting Guide for F61 and/or F76--------37
10.2. DVD/CD Laser Diode current measurement------40
10.3. Basic Troubleshooting Guide for Traverse
Unit (Backend P.C.B.)-----------------------------------42
10.4. Basic Troubleshooting Guide for HDMI AV
output--------------------------------------------------------43
11 Service Fixture & Tools ---------------------------------------44
12 Disassembly and Assembly Instructions---------------45
12.1. Screw Type ------------------------------------------------45
12.2. Disassembly Flow Chart--------------------------------46
12.3. Main Components and P.C.B. Locations-----------47
12.4. Disassembly of Top Cabinet---------------------------48
12.5. Replacement of Tray Ornament----------------------49
12.6. Disassembly of Front Panel Block Assembly ----- 51
12.7. Disassembly of Panel P.C.B.--------------------------52
12.8. Disassembly of Power Button P.C.B.----------------54
12.9. Disassembly of Rear Panel----------------------------55
12.10. Disassembly of SMPS P.C.B.-------------------------55
12.11. Replacement of Current Limiting Switch
(Q5701)-----------------------------------------------------56
12.12. Replacement of Diode (D5706) ----------------------57
12.13. Disassembly of Main P.C.B.---------------------------58
12.14. Replacement of Digital Amplifier IC (IC403/
IC404/IC405)----------------------------------------------60
12.15. Disassembly of Backend P.C.B.----------------------62
12.16. Disassembly of Component Video P.C.B.----------63
12.17. Disassembly of DVD Mechanism Unit
(BRS1D)----------------------------------------------------64
12.18. Replacement of Traverse unit-------------------------65
13 Service Position-------------------------------------------------70
13.1. Checking & Repairing of Panel P.C.B.--------------70
13.2. Checking & Repairing of SMPS P.C.B.-------------70
13.3. Checking & Repairing Main P.C.B. ------------------71
13.4. Checking & Repairing of Backend P.C.B.----------73
14 Overall Simplified Block Diagram -------------------------75
15 Block Diagram ---------------------------------------------------76
15.1. Backend ----------------------------------------------------76
15.2. IC Terminal Chart-----------------------------------------77
15.3. System Control -------------------------------------------78
15.4. Audio & Video---------------------------------------------79
15.5. Power Supply ---------------------------------------------80
16 Wiring Connection Diagram---------------------------------82
17 Schematic Diagram---------------------------------------------83
17.1. Schematic Diagram Notes-----------------------------83
17.2. Backend Circuit-------------------------------------------85
17.3. Main Circuit------------------------------------------------90
17.4. Panel and Power Button Circuit ----------------------98
17.5. SMPS Circuit----------------------------------------------99
17.6. Component Video Circuit----------------------------- 101
18 Printed Circuit Board ---------------------------------------- 102
18.1. Backend P.C.B.----------------------------------------- 102
18.2. Main P.C.B. ---------------------------------------------- 103
18.3. Panel, Power Button and Component Video
P.C.B.------------------------------------------------------ 105
18.4. SMPS P.C.B. -------------------------------------------- 106
19 Appendix Information of Schematic Diagram------- 107
19.1. Voltage & Waveform Chart -------------------------- 107
19.2. Illustration of ICs, Transistor and Diode-----------115
19.3. Terminal Function of ICs------------------------------116
20 Exploded View and Replacement Parts List----------119
20.1. Exploded View and Mechanical Replacement
Parts List--------------------------------------------------119
20.2. Electrical Replacement Parts List ------------------122

3
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

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1.2. Before Repair and Adjustment
Disconnect AC power to discharge unit AC Capacitors as such (C5702, C5703, C5704, C5705, C5706) through a 10 Ω, 10 W resis-
tor 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 110/127V, 50/60 Hz in NO SIGNAL mode at volume minimal should be ~ 500 mA.
Current consumption at AC 240V, 50 Hz in NO SIGNAL mode at volume minimal should be ~ 500 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
“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. Caution For Fuse Replacement

5
1.5. Safety Part 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, Exploded View & 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.
Safety Ref No. Part No. Part Name & Description Remarks
8 RGRX1004E-D1 REAR PANEL
16 RKMX1009-K TOP CABINET
21 RMNX1050 BOTTOM PC SHEET
27 RMN1017 TOP PC SHEET
301 RAY1101-V TRAVERSE ASS'Y
A2 K2CQ2CA00006 AC CORD
A3 RQT9570-M O/I BOOK (Sp)
PCB5 REP4764C SMPS P.C.B. (RTL)
DZ5701 ERZVA5Z471 ZNR
L5701 G0B722G00002 LINE FILTER
L5702 G0B453G00003 LINE FILTER
F1 K5G312Y00007 FUSE
T2900 G4D1A0000142 SWITCHING TRANSFORMER
T5701 ETS35BL146AC SWITCHING TRANSFORMER
PC701 B3PBA0000579 PHOTO COUPLER
TH5701 D4CC11040013 THERMISTOR
TH5702 D4CAA5R10001 THERMISTOR
P5701 K2AA2B000011 AC INLET
R5701 D0GB824JA008 820K 1/10W
R5702 D0GB824JA008 820K 1/10W
R5703 D0GB824JA008 820K 1/10W
R5704 D0GB824JA008 820K 1/10W
C5702 F0CAF104A105 0.1uF
C5703 F0CAF104A105 0.1uF
C5704 F1BAF1020020 1000pF
C5705 F1BAF1020020 1000pF
C5706 F1BAF1020020 1000pF

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2Warning
2.1. Prevention of Electrostatic Discharge (ESD) to Electrostatic Sensitive
(ES) Devices
Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Elec-
trostatically 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 alumi-
num foil, to prevent electrostatic charge build up 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 compara-
ble 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) suf-
ficient to damage an ES device).

7
2.2. 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: 655 nm (DVD)/790 nm (CD)
Maximum output radiation power from pickup: 100 µW/VDE
Laser radiation from the 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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2.3. Service caution based on Legal restrictions
2.3.1. 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
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%
The letter of “PbF” is printed either foil side or components side on the PCB using the lead free solder.
(See right figure)

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2.4. 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.
2.4.1. 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 flexi-
ble cable, cut off the antistatic FPC.
Figure 1

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2.4.2. 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 electric-
ity in the working environment. Proceed servicing works under the working environment where grounding works is completed.
2.4.2.1. Worktable grounding
1. Put a conductive material (sheet) or iron sheet on the area where the optical pickup is placed, and ground the sheet.
2.4.2.2. Human body grounding
1. Use the anti-static wrist strap to discharge the static electricity form your body.
Figure 2

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3 Service Navigation
3.1. Service Information
This service manual contains technical information which will allow service personnel’s to understand and service this model.
Please place orders using the parts list and not the drawing reference numbers.
If the circuit is changed or modified, this information will be followed by supplement service manual to be filed with original service
manual.
•DVD Mechanism Unit (BRS1D):
1) This model uses DVD Mechanism Unit (BRS1D).
•Micro-processor:
1) The following components are supplied as an assembled part.
• Micro-processor IC, IC200 (RFKWMXH70EB)

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4 Specifications
Main unit
OAMPLIFIER SECTION
RMS Output Power: Dolby Digital Mode
Front Ch 55 W per channel (5 Ω), 1 kHz, 10% THD
Surround Ch 55 W per channel (5 Ω), 1 kHz, 10% THD
Center Ch 55 W per channel (5 Ω), 1 kHz, 10% THD
Subwoofer Ch 80 W per channel (3 Ω), 100 Hz, 10% THD
Total RMS Dolby Digital mode power 355 W
Front Ch 67 W per channel (5 Ω), 1 kHz, 30% THD
Surround Ch 67 W per channel (5 Ω), 1 kHz, 30% THD
Center Ch 67 W per channel (5 Ω), 1 kHz, 30% THD
Subwoofer Ch 100 W per channel (3 Ω), 100 Hz, 30% THD
Total RMS Dolby Digital mode power 435 W
OFM TUNER, TERMINALS SECTION
Preset Memory FM 30 stations
Frequency Modulation (FM)
Frequency range 87.50 MHz to 108.00 MHz (50-kHz step)
Antenna terminals 75 Ω(unbalanced)
Digital audio input
Optical digital input Optical terminal
Sampling frequency 32 kHz, 44.1 kHz, 48 kHz
USB Port
USB standard USB 2.0 Full Speed
Media file format support MP3 (*.mp3)
JPEG (*.jpg, *.jpeg)
DivX (*.divx, *.avi)
USB device file system FAT12, FAT16, FAT32
USB Port power Max. 500 mA
Bit rate Up to 4 Mbps (DivX)
ODISC SECTION
Discs played (8 cm or 12 cm)
(1) DVD (DVD-Video, DivX*4, 5)
(2) DVD-R (DVD-Video, MP3*2, 4, JPEG*3, 4, DivX*4, 5)
(3) DVD-R DL (DVD-Video, DivX*4, 5)
(4) DVD-RW (DVD-Video, MP3*2, 4, JPEG*3, 4, DivX*4, 5)
(5) +R/+RW (Video)
(6) +R DL (Video)
(7) CD, CD-R/RW (CD-DA, Video CD, SVCD*1, MP3*2, 4, JPEG*3, 4,
DivX*4, 5)
*1 Conforming to IEC62107
*2 MPEG-1 Layer 3, MPEG-2 Layer 3, MPEG-2.5 Layer 3
*3 Exif Ver 2.1 JPEG Baseline files
Picture resolution:
16:9 min. size 4 x 4, max. size (720 x 8) x (405 x 8);
4:3 min. size 4 x 4, max. size (720 x 8) x (540 x 8)
*4 The total combined maximum number of recognizable audio, pic-
ture and video contents and groups: 2600 audio, picture and video
contents and 259 groups. (Excluding Root folder)
*5 Plays DivX®video
Pick up
Wavelength (DVD/CD) 655/790 nm
Laser power CLASS 1
Audio output (Disc)
Number of channels 5.1 ch (FL, FR, C, SL, SR, SW)
OVIDEO SECTION
Video system NTSC
Composite video output
Output level 1 Vp-p (75 Ω)
Terminal Pin jack (1 system)
Component video output
Y output level 1 Vp-p (75 Ω)
PBoutput level 0.7 Vp-p (75 Ω)
PRoutput level 0.7 Vp-p (75 Ω)
Terminal Pin jack (Y: green, PB: blue, PR: red) (1 system)
OGENERAL
Power supply AC 110 V to 240 V, 50/60 Hz
Power consumption Main Unit 50 W
Dimensions (W×H×D) 360 mm ×48 mm ×273 mm
Mass Main unit 2.0 kg
Operating temperature range 0 °C to +40 °C
Operating humidity range: 35 % to 80 % RH (no condensation)
Power Consumption in standby mode: approx. 0.45 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 ana-
lyzer.
Solder:
This model uses lead free solder (PbF).
Refer to their respective original service manuals for *1.

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4.1. Others (Licences)

14
5 General/Introduction
5.1. Power-Saving Features

15
5.2. Disc Information
5.2.1. Media that can be played

16
5.2.2. File Extension Type Support (MP3/JPEG/DivX)

17
5.3. DivX Information

18
6 Location of Controls and Components
6.1. Remote Control Key Button Operations

19
6.2. Main Unit Key Button Operations

20
7 Installation Instructions
Turn off all equipment before connection and read the appropriate operating instructions.
Do not connect the AC power supply cord until all other connections are completed.
7.1. Speaker Connections