Panasonic SCHTR-310-P Service manual

RMS

10%

100

Total

half

Input

TV,

S/N

BD/DVD,

Input

TV,

Tone

BASS

TREBLE

Digital

Optical

Coaxial

HDMI

This

Home Theater Audio System

SC-HTR310P

Colour

(K)... Black Type

ORDER NO. MD0808009CE

Specification

Amplifier Section

output power of each channel driven

total harmonic distortion

kHz Front CH 70 W per channel (4 Ω)

kHz Center CH 70 W per channel (4 Ω)

Hz Subwoofer CH 90 W per channel (3 Ω)

RMS output power 300 W

harmonic distortion

power at 1kHz (Front CH) 0.5 % (4 Ω )

sensitivity

AUX 3 450 mV, IHF’66

at rated power (4 Ω)

TV, AUX 1, AUX 2 80 dB

impedance

AUX 3 47 kΩ

controls

50Hz,+6dBto-6dB

20 kHz, +6 dB to -6 dB

input

Input 1

Output 1

system supports “HDAVI Control 1” function.

General

Power supply AC 120V, 60 Hz

Power consumption

Main set 68 W

Standby (HDMI ON) 0.7 W

Standby (HDMI OFF) 0.3 W

I Rack System

INCLUDING SPEAKER

Dimensions (W x H x D) 1300 mm x 444 mm x 458 mm

Mass approx. 50 kg

* Mass is a Completed (AMP, Speaker Unit inc)

Maximum Loading Weight 80 kg

I Speaker System

FRONT (L/R) 1-Way 1 Speaker System

6.5 cm Cone Type Full Range x1

CENTER 1-Way 1 Speaker System

SUBWOOFER 1-Way 2 Speaker System

Notes :

1. Specifications are subject to change without notice.

2. Total harmonic distortion is measured by the digital spectrum analyser.

6.5 cm Cone Type Full Range x1

13 cm Cone Type Woofer x2

(Bass Reflect)

SC-HTR310P

CONTENTS

Page Page

1 Safety Precaution s 3

2 Prevention of Electro Static Discharge (ESD) to

Electrostatically Sensitive (ES) Devices

3 Handling the Lead free Solder

4 Operating Procedures

5 Self Diagnosis Display Function

6 HDMI Checking Method

7 Assembling and Disassembling

8 Service Position

9 Voltage Measurement & Waveform Chart

10 Wiring Connection Diagram 103

11 Block Diagram

12 Notes Of Schematic Diagram

13 Schematic Diagram

14 Printed Circuit Board Diagrams

15 Illustration of IC’s, Transistors and Diodes

16 Terminal Function of IC’s

17 Exploded Views

18 Replacement Parts List

105

109

111

127

135

136

137

141

SC-HTR310P

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, ensure that all the protective devices such as insulation barriers, insulation papers shields are properly installed.

3. After servicing, check for leakage current checks to prevent 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. Using an ohmmeter measure the resistance value, between the jumpered AC plug and each expose d metallic cabine t 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 1MΩ and 5.2Ω. 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 isolatio n 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. should the measurement is outside of the limits specified, there is a possibility of a shock hazard, and the equipment should be repaired and re-checked before it is returned to the customer.

Fig. 1

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1.2. Before Repair and Adjustment

Disconnect AC power, discharge ac capacitors C5712, C5808, C5805, C5813, C5816, C5824, C5517 , C5516, C5508, C5509, C5510, C5511, C5512 and C5513 through a 10Ω, 1W 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, 60 Hz in NO SIGNAL mode (at volume minimum) should be 200 ~ 800 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 connec tion 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. Safety Part Information

Safety Parts List:

There are special components used in this equipment which are important for safety.These parts are marked by 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 8 REXX0640-J BLACK WIRE [M] 9 REXX0641-J RED WIRE [M] 14 RKMX0141B-S1 TOP CABINET [M] 15 RGR0383D-C REAR PANEL [M] A2 K2CB2CB00021 AC CORD [M] A6 RFA2903 TOP GLASS ACCESSORY [M] A8 RXQ1607 PREPARED GLASS DOOR ASSY L [M] A9 RXQ1608 PREPARED GLASS DOOR ASSY R [M] DZ5701 ERZV10V511CS ZENER [M] L5701 ELF15N035AN LINE FILTER [M] L5702 ELF22V020A LINE FILTER [M] T701 G4D1A0000117 SW TRANSFORMER [M] T5701 ETS42BM1A1AC TRANSFO RMER [M] T5751 ETS19AB281AG BACKUP TRANSFORMER [M] PC5701 B3PBA0000402 PHOTO COUPLER [M] PC5720 B3PBA0000402 PHOTO COUPLER [M] PC5799 B3PBA0000402 PHOTO COUPLER [M] F1 K5D802APA008 FUSE [M] IP701 K5H5012A0010 IC PROTECTOR [M] IP702 K5H302100004 IC PROTECTOR [M] TH5701 D4CAA2R20001 THERMISTOR [M] TH5860 D4CC11040013 THERMISTOR [M] P5701 K2AB2B000011 AC INLET [M] PCB5 REPX0676N SMPS P.C.B. / AC INLET P.C.B. [M] (RTL)

in the

1.5. Caution for fuse replacement

SC-HTR310P

2 Prevention of Electro Static Discharge (ESD) to

Electrostatically Sensitive (ES) Devices

Some semiconductor (solid state) devices can be damaged easily by 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 electro static discharge (ESD).

1. Immediately before handlin g any semiconducto r component or semiconductor-equiped 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 equiped with ES devices, place the assembly on a conductive surface such as aluminium 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 remover device. Some solder removal devices not classified as “anti-static (ESD protected)” can generate electrical charge to damage ES devices.

5. Do not use freon-propelled chemicals. These can generate electrical charges sufficie nt 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, aluminium foil or comparable conduc tive 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 installe d.

Caution

Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.

8. Minimize body 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) sufficie nt to damage an ES device).

SC-HTR310P

3 Handling the Lead free Solder

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

The letter of “PbF” is printed either foil side or component s 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%

SC-HTR310P

4 Operating Procedures

4.1. Control guide

4.1.1. This system

4.1.2. Control panel

SC-HTR310P

4.1.3. Amplifier

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4.1.4. Remote control

4.2. Remote control preparation

4.2.1. Inserting the batteries

4.2.2. Using the remote control

SC-HTR310P

4.3. Installing and assembling the rack

SC-HTR310P

4.4. Home Theater connections

4.4.1. Basic connections

4.4.2. Connecting equipment with HDMI terminal (TV, DVD recorder, etc.)

SC-HTR310P

4.4.3. Connecting with digital terminal-mouted equipment

4.4.4. Connecting with VCR

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4.5. Other connections

4.5.1. Connecting a set top box (cable or satellite)

4.5.2. Connecting a combination DVD recorder/VCR

SC-HTR310P

4.6. AC mains supply connection

5 Self Diagnosis Display Function

SC-HTR310P

This unit is equipped with the self diagnosis display function,

during servicing.

which alarms faulty operation with error code. Use this function

5.1. Automatically Displayed Error Codes

An error code automatically appears on the display (LCD) when faulty operation is detected. Refer to Fig. 5.1.

Fig. 5.1

5.2. Display Details

Refer to the following table.

LCD display Symptom Cause and Remedy OVERLOAD Speaker short, amplifier failure, electrical

FANLOCK Fan stopped Failure fan and fan control circuits. Check

F70 Communication error between sub micro-

F76 When the power is turned on, the unit

Remote 2 Remote 1

U70-1-1 — The equipment connected by the HDMI

U70-1-2 — The system is receiving video signals that

U70-3 — A problem has occurred with the HDMI

NOT POSSIBLE FOR THIS INPUT SOURCE (Scrolling)

overload etc. Humidity protection activated

processor and its peripheral LSI

power automatically turns off; the power cannot be turned on.

— Set the same remote control code for this

— You cannot use Dolby Virtual Speaker,

Speaker short and failure in power amplifier, pre-amplifier circuits. Check for faulty parts and replace with new parts if necessary.

for faulty parts and replace with new parts if necessary.

Failure sub-micro processor and its peripherals LSI. Check for faulty parts and replace with new parts if necessary.

Failure in the power circuit system of the unit. This may happen when the direct current electricity is supplied to speaker terminals. Check that the speaker wires are not shorted (bare wire touching each other) or that the unit is in a hot enviroment without proper ventillation.

system and remote control.

• If “REMOTE 2” is displayed, set remote control code to “2”.

• If “REMOTE 1” is displayed, set remote control code to “1”.

cable is not compatible with this system’s copyright protection technology.

are incompatible with it through HDMI connection. Check the settings of the connected equipment.

connection. Try the following to correct the problem. Consult your dealer if the error code remains on the display.

• Turn the connected equipment off and on again.

• Disconnect the HDMI cable then reconnect it.

• Do not connect more than 2 equipment in series to the output of this system.

Dolby Pro Logic II and SFC for dual sounds.

SC-HTR310P

LCD display Symptom Cause and Remedy NOT POSSIBLE FOR THIS PCM

SOURCE (Scrolling)

— You cannot use Dolby Virtual Speaker,

Dolby Pro Logic and SFC effect with PCM signals with sampling frequency over 48 kHz. SFC is not available for multi-channel LPCM signal.

SC-HTR310P

5.3. Activating Self Diagnosis Function (Servicing Mode)

This mode can be used during servicing.

1. Plug the AC adapter to the power source. Press and hold down the [VOL +] button and the [VOL -] button, and then press the [POWER] button at the same time.

2. The message, [SERVICE] appears on the display for three seconds, and then it will display the following. Refer to Fig. 5.2.

Fig. 5.2

3. To confirm the µP software version: When [VOL +] button is pressed, [M--- ****] is display ed [---] is current main micon version; [****] is current checksum. If no ROM correction, [NO] is display ed.

When [VOL -] is pressed, display [H***], [***] is current version of HDMI micon.

SC-HTR310P

5.4. 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 [INPUT SELECTOR] button and the [VOL +] button, and then press the [POWER] button at the same time.

2. The message, “_DOCTOR_” appears on the display for three seconds, and then it will display the following. Refer to Fig. 5.3.

Fig. 5.3

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

OK TV STEREO Digital (OPT 1 ) -48dB/0dB

SFC MUSIC AUX 1 STEREO Digital (OPT 2 ) -48dB/0dB

MUTING All indicators of FL are displayed. All LED are off. Refer to Fig. 5.4.

Volume Up Check Main µP software version.

Volume Down Check HDMI uP software Version.

TEST AUX2 (Analog) - All CH Output Mode -18dB/0dB

Note : After this setting, only ‘POWER’ button or ‘Checker Command’ code by the remote control can be entered.

Display [M---- ****], [----] is current version; **** is current checksum. If no ROM correction, [NO] is displayed. Volume is still increased but not displayed.

Display [H---- ^^^^^], [----] is current version. Volume is still increased but not displayed.

TV STEREO Balance is set to leftmost. -18dB/0dB TV STEREO Balance is set to rightmost. -18dB/0dB

5.5. Returning to Normal Display

Press the [POWER] button on the unit to exit the function. The power is turned off.

Fig. 5.4

6 HDMI Checking Method

1. Connection of HDMI system

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2. Check of HDMI Sound

a. Using the [DVD AUDIO TEST DISC V-612] and DVD-VIDEO disc with Dolby Digital signal.

b. [DVD AUDIO TEST DISC V-612] - Track No. 92 (96kHz, 5.1ch). Track No. 40 (Zero) Check the Level and Noise, output from

L / C / R / SL / SR / SW / speaker or pin.

c. [DVD AUDIO TEST DISC V-612] - Track No. 7 (192kHz, 2ch)

if this source can be reproduced, it is OK.

3. Check of HDMI Picture

a. The picture quality of TV is checked by watching that using [DVD TEST DISK S-20] or DVD disc with the colour bar signal.

b. [DVD TEST DISK S-20] - Track No. 2 (Flag of the rising sun)

[Colour bar disc] - Colour bar signal.

c. Make on DVD Setup Picture

Comfirmed that there are neither distortion nor a noise on the screen.

• If it is a picture quality equal when DVD was connec ted directly to TV, it is OK

SC-HTR310P

1. Connect directly DVD player to TV.

2. Connect DVD player to set then connect it to TV.

3. Do the comparison for (1) and (2) if same, it is OK.

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