Panasonic SAHT-17 Service manual

Specification

nAMPLIFIER SECTION

RMS output power of each channel driven

(at 240 V for areas other than continental Europe)

10 % total harmonic distortion

1 kHz front CH

170 W per channel (6 Ω)

1 kHz surround CH

70 W per channel (4 Ω)

1 kHz center CH

260 W per channel (4 Ω)

100 Hz subwoofer CH

260 W per channel (4 Ω)

Total RMS output power 1000 W

DIN power output: Dolby Digital Mode

(at 240 V for areas other than continental Europe)

T.H.D. 1%

1 kHz front CH

100 W per channel (6 Ω)

1 kHz surround CH

45 W per channel (4 Ω)

1 kHz center CH

150 W per channel (4 Ω)

100 Hz subwoofer CH

160 W per channel (4 Ω)

Total DIN output power

DIN power output: Stereo Mode

(at 240 V for areas other than continental Europe)

T.H.D. 1%

1 kHz front CH

600 W

ORDER NO. MD0504177C2

AV Control Receiver

SA-HT17EP SA-HT17EG SA-HT17EB

Color

(S).......................Silver Type

90 W per channel (6 Ω)

100 Hz subwoofer CH

160 W per channel (4 Ω)

Total DIN output power

340 W

Total harmonic distortion

Half power at 1 kHz (Front CH) 0.1% (6 Ω)

Input sensitivity

DVD, DVR/VCR, TV, GAME/AUX

S/N at rated power (6 ΩΩΩΩ)

DVD, DVR/VCR, TV, GAME/AUX

Input impedance

DVD, DVR/VCR, TV, GAME/AUX 47 kΩ

Tone controls

BASS 50 Hz, +10 to -10 dB

TREBLE 20kHz,+10to-10dB

Digital input

OPTICAL 2

COAXIAL

nVIDEO SECTION

Output voltage at 1 V input (unbalanced) 1±0.1 Vp-p

Maximum input voltage

Input/output impedance 75 Ω

nFM TUNER SECTION

Frequency range 87.50-108.00 MHz

Sensitivity

S/N 30 dB 1.5 µV/ 75 Ω

S/N 26 dB 1.3 µV/ 75 Ω

S/N 20 dB 1.2 µV/ 75 Ω

IHF usable sensitivity (IHF’58) 1.5 µV/ 75 Ω

400 mV, IHF’66

75 dB (85 dB, IHF’66)

1.5 Vp-p

SA-HT17EP / SA-HT17EG / SA-HT17EB

IHF 46 dB stereo quieting sensitivity 22 µV/ 75 Ω

Total harmonic distortion

MONO 0.2%

STEREO 0.3%

S/N

MONO 60 dB (71 dB, IHF)

STEREO 58 dB (65 dB, IHF)

Frequency response

20 Hz-15 kHz, +1 dB, -2 dB

Image rejection at 98 MHz

IF rejection at 98 MHz

Stereo separation

1 kHz

Antenna terminal 75 Ω (unbalanced)

nAM TUNER SECTION

Frequency range

522-1611 kHz (9 kHz steps)

530-1620 kHz (10 kHz steps)

Sensitivity

Selectivity (at 999 kHz)

nGENERAL

Power supply (For United Kingdom) AC 230-240 V, 50 Hz

Power supply (For Continental Europe)

Power consumption

(Main unit) 25 W

(Subwoofer) 390 W

Dimensions (W × H × D) (Main unit) 430 × 63 × 260 mm

Mass (Main unit)

Power consumption in standby mode:

AC 230 V, 50 Hz

40 dB

70 dB

40 dB

450 µV/m

35 dB

1.85 kg

nSYSTEM

System: SC-HT17 (EP)

Main unit: SA-HT17 (EP)

Satellite Speaker: SB-HT17 (P)

Active Subwoofer: SB-WA17 (E)

System: SC-HT17 (EG)

Main unit: SA-HT17 (EG)

Satellite Speaker: SB-HT17 (P)

Active Subwoofer: SB-WA17 (E)

System: SC-HT17 (EB)

Main unit: SA-HT17 (EB)

Satellite Speaker: SB-HT17 (P)

Active Subwoofer: SB-WA17 (EB)

Speaker: SB-HT17 (P)

Front speakers: SB-FS930 (P-S1) x 2

Surround speakers: SB-FS880 (EG-S1) x 2

Center speaker: SB-PC930 (P-S1) x 1

Notes:

1. Specifications are subject to change without notice. Mass and dimensions are approximate.

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

For main unit

Marking sign is located on bottom of the unit.

* Manufactured under license from Dolby Laboratories. “Dolby”, “Pro Logic” and the double-D symbol are trademarks of Dolby Laboratories.

** Manufactured under license from Digital Theater System. “DTS” and “DTS Digital Surround” are trademarks of Digital Theater System.

CONTENTS

Page Page

1 Caution for AC Mains Lead

2 Use of Active Subwoofer

2.1. Checking Player when Active Subwoofer is Used

2.2. Checking Main Unit Using Power Jig

3 Before Repair and Adjustment (Using Active Subwoofer Unit)

4 Safety Precautions

4.1. GENERAL GUIDELINES

5 Handling the Lead Solder

5.1. About lead free solder (PbF)

6 About the Protection Circuitry

7 Accessories

8 Operation Procedures

9 Remote Control

10 Assembling and disassembling

10.1. Disassembly flow chart

10.2. P.C.B. Positions

10.3. Disassembly of Top Cabinet

10.4. Disassembly of Rear Panel

10.5. Disassembly of Front Panel

10.6. Disassembly of Panel P.C.B.

10.7. Disassembly of Function P.C.B. & Volume P.C.B.

10.8. Disassembly of S-Video P.C.B.

10.9. Disassembly of DSP P.C.B.

10.10. Disassembly of Main P.C.B.

11 Service Position

11.1. Checking the DSP P.C.B. (Side A) & S-Video P.C.B.

11.2. Checking the Main P.C.B., Panel P.C.B., Function P.C.B.,

Volume P.C.B. & DSP P.C.B. (Side B)

12 Self Diagnosis Display Function

12.1. Automatically Displayed Error Codes

12.2. Error Code Display Details

SA-HT17EP / SA-HT17EG / SA-HT17EB

12.3. Activating Self Diagnosis Function (Doctor Mode) 18

12.4. Activating Self Diagnosis Function (Service Mode)

12.5. The Shutdown And Short Circuit Protection Detection

12.6. Returning to Normal Display

13 Block Diagram

14 Schematic Diagram

14.1. (A) DSP Circuit

14.2. (B) Main Circuit

14.3. (C) Panel Circuit

14.4. (D) Volume Circuit & (E) Function Circuit

14.5. (F) S-Video Circuit

15 Printed Circuit Board Diagram

15.1. (A) DSP P.C.B.

15.2. (B) Main P.C.B.

15.3. (C) Panel P.C.B. & (D) Volume P.C.B.

15.4. (E) Function P.C.B. & (F) S-Video P.C.B.

16 Wiring Connection Diagram 17 Type Illustration of ICｴs, Transistors and Diodes

18 Terminal Function of IC

18.1. IC900 (C2CBHG000166): Microprocessor

19 Parts Location and Replacement Parts List

19.1. Cabinet Parts Location

19.2. Electrical Parts List

19.3. Packing Materials & Accessories Parts List

19.4. Packaging

SA-HT17EP / SA-HT17EG / SA-HT17EB

1 Caution for AC Mains Lead

SA-HT17EP / SA-HT17EG / SA-HT17EB

2 Use of Active Subwoofer

2.1. Checking Player when Active Subwoofer is Used

1. This unit uses the active subwoofer to supply the power of the component, and the active subwoofer should be connected to the component to check operational conditions of the component.

2.2. Checking Main Unit Using Power Jig

If the active subwoofer is not available during time of repair to the unit, the following equipment could be used.

Jig product number

RFKZ0182 (110V , 127V, 220V, 230V - 240V for with voltage selector overseas domestic use).

SA-HT17EP / SA-HT17EG / SA-HT17EB

3 Before Repair and Adjustment (Using Active Subwoofer

Unit)

Disconnect AC power, discharge Power Supply Capacitors C546, C547, C548 & C549 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 230V, 50Hz in NO SIGNAL mode should be ~900 mA (For EP & EG only).

Current consumption at AC 230V - 240V, 50Hz in NO SIGNAL mode should be ~900 mA (For EB only).

4 Safety Precautions

4.1. 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, make the following leakage current checks to prevent the customer from being exposed to shock hazards.

4.1.1. 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 5.2Ω. When the exposed metal does not have a return path to the chassis, the reading must be

Fig. 1

4.1.2. LEAKAGE CURRENT HOT CHECK (See Figure 1.)

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.

SA-HT17EP / SA-HT17EG / SA-HT17EB

5 Handling the Lead Solder

5.1. About lead free solder (PbF)

Distinction of PbF P.C.B. :

P.C.B.s (manufactured) using lead free solder will have a PbF stamp on the P.C.B.

Caution:

· Pb free solder has a higher melting point that standard solder; Typically the melting point is 50 - 70°F (30 - 40°C) higher.

Please use a high temperature soldering iron. In case of the soldering iron with temperature control, please set it to 700 ± 20°F (370 ± 10°C).

· Pb free solder will tend to splash when heated too high (about 1100°F/600°C).

· W hen soldering or unsoldering, please completely remove all of the solder on the pins or solder area, and be sure to heat the

soldering points with the Pb free solder until it melts enough.

6 About the Protection Circuitry

The protection circuitry may have operated if either of the following conditions is noticed:

*No sound is heard when the power is supplied.

*Sound stops during a performance.

The functions of this circuitry is to prevent circuitry damage, 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 this unit are used.

If this occurs, follow the procedure outlined below:

1. Press the STANDBY

2. Determine the cause of the problem and correct it.

3. Press the STANDBY

Note:

When the protection circuitry functions, the unit will not operate unless the STANDBY then ON again.

/ON button, switch to STANDBY mode.

/ON button once again, supply the power.

/ON button is first switched STANDBY and

SA-HT17EP / SA-HT17EG / SA-HT17EB

7 Accessories

AC cord (For EB only)

AC cord (For EG & EP

only)

System cable

FM indoor antenna

AM loop antenna

Remote control

Antenna plug

adapter (For EB

only)

8 Operation Procedures

SA-HT17EP / SA-HT17EG / SA-HT17EB

9 Remote Control

SA-HT17EP / SA-HT17EG / SA-HT17EB

10 Assembling and disassembling

“ATTENTION SERVICER”

Some chassis components may have sharp edges.

Be careful when disassembling and servicing.

1. This section describes procedures for checking the operation of the major printed circuit boards and replacing the main components.

2. For reassembly after operation checks or replacement, reverse the respective procedures.

Special reassembly procedures are described only when required.

3. Select items from the following index when checks or replacement are required.

· Disassembly of Top Cabinet

· Disassembly of Rear Panel

· Disassembly of Front Panel

· Disassembly of Panel P.C.B.

· Disassembly of Function P.C.B. & Volume P.C.B.

· Disassembly of S-Video P.C.B.

· Disassembly of DSP P.C.B.

· Disassembly of Main P.C.B.

Warning:

This product uses a laser diode. Refer to caution statement Precaution of Laser Diode.

ACHTUNG:

Die Lasereinheit nicht zerlegen.

Die Lasereinheit darf nur gegen eine vom Hertsteller spezifizierte Einheit ausgetauscht werden.

10.1. Disassembly flow chart

The following chart is the procedure for disassembling the casing and inside parts for internal inspection when carrying out the servicing.

To assemble the unit, reverse the steps shown in the chart as below.

SA-HT17EP / SA-HT17EG / SA-HT17EB

10.2. P.C.B. Positions

10.3. Disassembly of Top Cabinet

Step 1: Remove 2 screws.

Step 3 : Open and lift up the top cabinet in the direction of

Step 2 : Remove 5 screws at rear panel.

arrow shown.

10.4. Disassembly of Rear Panel

· Follow the (Step 1) - (Step 3) of item 10.3 - Disassembly of Top Cabinet

Step 1 : Remove 13 screws, pull rear panel forward in the arrow shown.

SA-HT17EP / SA-HT17EG / SA-HT17EB

10.5. Disassembly of Front Panel

· Follow the (Step 1) - (Step 3) of item 10.3 - Disassembly of Top Cabinet

Step 1 : Remove the volume knob.

Step 2 : Remove 1 screw securing the grounding at Main P.C.B..

Step 3 : Detach wire connectors (CN103, CN104A, CN104B, CN100A & CN100B).

Step 4 : Release the claws & catches and push the front panel as arrow shown.

SA-HT17EP / SA-HT17EG / SA-HT17EB

10.6. Disassembly of Panel P.C.B.

NOTE: When assembling the front panel unit, align the 2

catches properly.

· Follow the (Step 1) - (Step 3) of item 10.3 - Disassembly of Top Cabinet

· Follow the (Step 1) - (Step 4) of item 10.5 - Disassembly of Front Panel

Step 1 : Remove 5 screws at Panel P.C.B.

10.7. Disassembly of Function P.C.B. & Volume P.C.B.

· Follow the (Step 1) - (Step 3) of item 10.3 - Disassembly of Top Cabinet

· Follow the (Step 1) - (Step 4) of item 10.5 - Disassembly of Front Panel

· Follow the (Step 1) of item 10.6 - Disassembly of Panel P.C.B.

Step 1 : Remove 5 screws at Function P.C.B. and 4 screws at Volume P.C.B.

10.8. Disassembly of S-Video P.C.B.

· Follow the (Step 1) - (Step 3) of item 10.3 - Disassembly of Top Cabinet

Step 1 : Remove 2 screws at rear panel.

Step 2 : Disconnect connector CN351 at Main P.C.B.

10.9. Disassembly of DSP P.C.B.

SA-HT17EP / SA-HT17EG / SA-HT17EB

· Follow the (Step 1) - (Step 3) of item 10.3 - Disassembly of Top Cabinet

Step 1 : Remove 3 screws at rear panel.

Step 2 : Remove 2 screws at DSP P.C.B..

Step 3 : Disconnect 4 connectors, CN904 B, CN405, CN906 & CN403B at DSP P.C.B.

SA-HT17EP / SA-HT17EG / SA-HT17EB

10.10. Disassembly of Main P.C.B.

· Follow the (Step 1) - (Step 3) of item 10.3 - Disassembly of Top Cabinet

Step 1 : Remove 8 screws at rear panel.

Step 2 : Remove 5 screws at Main P.C.B.

Step 3 : Remove 8 connectors at Main P.C.B. (CN100B, CN100A, CN104 B, CN104A, CN103, CN904A, CN403 A & CN351) & 2 connectors at DSP P.C.B. (CN906 & CN405 ).

SA-HT17EP / SA-HT17EG / SA-HT17EB

11 Service Position

Note:

Checking of all Major P.C.B. (S-Video P.C.B, Main P.C.B., DSP P.C.B., Volume P.C.B., Panel P.C.B. & Fuction P.C.B.) can be carried out using below procedures.

For the disassembling procedure, see Section 10.

11.1. Checking the DSP P.C.B. (Side A) & S-Video P.C.B.

1. Remove Top Cabine t.

2. Remove Rear Panel.

3. Disassembly of S-Video P.C.B..

11.2. Checking the Main P.C.B., Panel P.C.B., Function P.C.B., Volume

P.C.B. & DSP P.C.B. (Side B)

1. Remove Top Cabine t.

2. Remove Rear Panel.

3. Disassembly of Front Panel.

4. Disassembly of Panel P.C.B., Function P.C.B., Volume P.C.B., S-Video P.C.B., Main P.C.B. & DSP P.C.B..

5. Flip the PCBs over (see as shown in picture below).

SA-HT17EP / SA-HT17EG / SA-HT17EB

12 Self Diagnosis Display Function

This unit is equipped with the self diagnosis display function, which alarms faulty operation with error code. Use this function during servicing.

12.1. Automatically Displayed Error Codes

An error code automatically appears on the display (FXX) when faulty operation is detected. Refer to Fig. 12.1. For error codes, refer to Section 12.2.

<Fig.12.1>

12.2. Error Code Display Details

Refer to the following table for error codes.

FL Display Symptom Cause and Remedy

OVERLOAD Speaker short, amplifier failure. Speaker short and failure in power

Humidity protection activated.

FAN LOCK The fan stops suddenly. Failure in fan or fan control circuits. Check

F70 Communication error between sub micro

processor and its peripheral LSI

F76 When the power is turned on, the unit

power autimatically turns off, the power cannot be turned on.

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 aprts 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 for the above and replace with new parts if necessary.

12.3. Activating Self Diagnosis Function (Doctor Mode)

This mode can be used during servicing.

1. With the following operation, the processing of this mode begins.

· Press and hold down the “INPUT SELECTOR” button and the “HARMONIC BASS” button, and then press the “POWER”

button at the same time.

* At this time, initialize all setting and set the following frequency to Tuner. FL display will display “_DOCTOR_” for 3 seconds.

E1: 99.7 MHz, E2/3: 93.40 MHz, JAPAN: 87.8 MHz

* The display is always blinked with 1Hz cycle to indicate that DOCTOR MODE is activated.

2. Normal function for all buttons on the unit.

3. Doctor mode function at some remote control codes as table below.

Remote Control Test Mode Function and settings

Selector Sound Mode Other setting Vol/Tone

CH 1 TUNER STEREO Frequency : FM min. *1) -48dB/0dB CH 2 TUNER STEREO Frequency : FM max. -48dB/0dB CH 3 TUNER STEREO FM 98.3 MHz. -18dB/0dB CH 4 TUNER STEREO Frequency : AM min. -48dB/0dB CH 5 TUNER STEREO Frequency : AM max. -48dB/0dB CH 6 TUNER STEREO AM 765 kHz (9kHz/step) -18dB/0dB CH 7 TUNER STEREO AM 770 kHz (10kHz/step) -18dB/0dB CH 8 If the input selector is TUNER, auto tuning function is started to upward on current frequency. CH 9 If the input selector is TUNER, auto tuning function is started to downward on current frequency. CH 0 All indicators of FL are displayed. All LED are off.

Note: After this setting, only “POWER” button or “CHECKER COMMAND” code by the remote control

can be entered. CH UP Check Main uP software Version. CH DOWN Display [SUM_****]; **** is checksum. If no ROM correction, display [NO_EPRO M]. SUBWOOFER VCR (Analog) ---- - -18dB/0dB MUTING DVD 6 CH ---- - -18dB/0dB INPUT MODE GAME/ AUX STEREO Analog -18dB/0dB SLEEP TV STEREO Analog -18dB/0dB TONE/BAL DVD STEREO Analog -18dB/0dB LEVEL DVR/VCR STEREO Analog -18dB/0dB EFFECT DVD STEREO Digital (COAX) -48dB/0dB STEREO TV STEREO Digital (OPT 1) -48dB/0dB PL2 DVR/VCR STEREO Digital (OPT 2) -48dB/0dB TEST No change SURROUND Scan the test noise output channel with

500ms intervals.

-/L GAME/ AUX STEREO Balance is set to leftmost. -18dB/0dB +/R GAME/ AUX STEREO Balance is set to rightmost. -18dB/0dB DIMMER If the input selector is TUNER in E2 mode, Display mode (PS/PTY) is changed.

SA-HT17EP / SA-HT17EG / SA-HT17EB

-18dB/0dB

* By the model setting, when there is not a function, ignore it. (ex. INPUT MODE in HT15 mode)

* Auto decode mode cannot activate in Doctor Mode.

*1) Memorize this frequency once in CH1 to 7 and recall it.

4. After enter the remote control code “DIRECT (TUNING)”, the message “OK” will appear for 0.2s second when each button is press one by one.

5. Press “POWER” button on main unit or remote control to exit this mode.

12.4. Activating Self Diagnosis Function (Service Mode)

This mode is used for purpose of servicing.

1. With the following operation, the processing of this mode begins.

· Press and hold down the “HARMONIC BASS” button and the “TUNING DOWN” button, and then press the “POWER” button

at the same time.

* At this time, initialize all setting and set the following frequency to Tuner. FL display will display “SERVICE” for 3 seconds.

2. To confirm the uP software Version: Press “TUNING DOWN” button on main unit, “MS085 **” is display ed.

SA-HT17EP / SA-HT17EG / SA-HT17EB

3. When [TUNE UP] is pressed, display “SUM ****”, “****” is the check sum of ROM for ROM correction.

If there is no EEPROM IC, “NO EPROM” is display ed.

4. Press “POWER” button on main unit or remote control to exit this mode.

12.5. The Shutdown And Short Circuit Protection Detection

It detects S_DET and DC_DET input port for malfunction.

1. S_DET Function (SHORT DETECTION)

It is to detect a short in the Power Supply. The detection of S_DET starts after 700ms after POWER ON.

After that, it is always detected for any malfunction.

Upon detection, the FLD display “F76” and the system is POWER OFF by setting POWER_REL AY port to OFF.

2. DC_DET Function

DC_DET (pin 94) on micon is used to detect FAN LOCK. During POWER ON, it will be ignored until ALL_MUTE is released.

Upon detection, FLD display “FAN LOCK” and MUTE_ALL will be set to ON. If any button is pressed, it is made to scroll error message “SWITCH OFF POWER”. After Power Off and On,this condition is reset, and DC_DET will resume detection of error.

It also sets MUTE_SW to ON, to switch OFF the power amplifier.

3. FREQUENCY LIMITER

Due to surround speaker change from 6.5 cm to 8 cm. We have to limited certain output level to certain FOR FRONT L/R channel and SURROUND L/R cut off frequency in order to avoid speaker noise.

4 ports are used for this purpose. 2 ports are used for front L/R channel, 2 ports for surround L/R channel.

Front Left/ Right Freq limiter (Port Name: FRONT_fc1[pin49], FRONT_fc2[pin50])

Surround Left/ Right Freq limiter (Port Name: SURR_fc1[pi n47], SURR_fc2[pin48])

For FRONT L/R

For SURROUND L/R

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