SC-HTB170EES - Panasonic Audio Service Manual (repair manual)

PSG1304017CE

Product Color:   (S)...Silver Type

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
1.6. Safety Instation Instructions ------------------------- 5

2 Warning -------------------------------------------------------------- 6

2.1. Prevention of Electrostatic Discharge (ESD)

to Electrostaticy Sensitive (ES) Devices---------- 6

2.2. Service caution based on Legal restrictions

(Lead Free Solder, (PbF)) ------------------------------- 7

3 Service Navigation ----------------------------------------------- 8

3.1. Service Information --------------------------------------- 8

4 Specifications ----------------------------------------------------- 9
5 General/Introduction -------------------------------------------10

5.1. About Bluetooth and Operation -----------------------10

5.2. About VIERA Link “HDAVI Control” ----------------- 11
5.3. Others (Licenses) ---------------------------------------- 12

6 Location of Controls and Components------------------ 13

6.1. Main Unit Key Button Operations -------------------- 13
6.2. Indicator illumination ------------------------------------ 14
6.3. Remote Control Key Button Operations------------ 15

7 Instation Instructions -------------------------------------- 16

7.1. Connections ----------------------------------------------- 16

8 Service Mode ----------------------------------------------------- 20

8.1. Method to enter into Service Mode ------------------ 20
8.2. Model Display Details by LED Blinking

Indicators--------------------------------------------------- 20

8.3. Error Codes Display ------------------------------------- 23
8.4. Cold start --------------------------------------------------- 25
8.5. SET AUDIO DELAY ------------------------------------- 25

9 Troubleshooting Guide --------------------------------------- 27

10 Service Fixture & Tools --------------------------------------- 29

2

11 Disassembly and Assembly Instructions --------------- 30

11.1. Disassembly flow chart --------------------------------- 31
11.2. Types of Screws ------------------------------------------ 32
11.3. Main Parts Location Diagram ------------------------- 32
11.4. Disassembly of Rear Cabinet Block  ---------------- 33
11.5. Disassembly of Amplifier Unit  ------------------------ 35
11.6. Disassembly of Sensor P.C.B.  ----------------------- 38
11.7. Disassembly of Sub Chassis Unit  ------------------- 41
11.8. Disassembly of HDMI P.C.B.  ------------------------- 44
11.9. Disassembly of Main P.C.B.  -------------------------- 46

11.10. Disassembly of SMPS and AC Inlet P.C.B.  ------- 49

11.11. Disassembly of Button P.C.B.  ------------------------ 56

11.12. Replacement of 6P Wire (Main - Button)  ---------- 61
11.13. Disassembly of Bluetooth Module P.C.B.  --------- 64
11.14. Disassembly of Tilt Switch P.C.B.  ------------------- 66
11.15. Disassembly of LED P.C.B.  --------------------------- 68
11.16. Disassembly of Front Tweeter Speaker (SP1)  --- 70
11.17. Disassembly of Front Tweeter Speaker (SP2)  --- 72
11.18. Disassembly of Front Woofer Speaker (SP3)  ---- 74
11.19. Disassembly of Front Woofer Speaker (SP4)  ---- 76
11.20. Replacement of Front Speaker Wire

Assembly -------------------------------------------------- 78

11.21. Disassembly of Subwoofer Speaker (SP5)  ------- 83
11.22. Disassembly of Subwoofer Speaker (SP6)  ------- 85
11.23. Disassembly of Port Assembly  ---------------------- 88

12 Service Position ------------------------------------------------- 91

12.1. Checking of SMPS and AC Inlet P.C.B. ------------ 91
12.2. Checking of Main P.C.B. (Side A) -------------------- 94
12.3. Checking of Main P.C.B. (Side B) -------------------- 98
12.4. Checking of HDMI P.C.B. and Sensor P.C.B. --- 100
12.5. Checking of Button P.C.B. --------------------------- 104
12.6. Checking of LED P.C.B. ------------------------------ 105

13 Overall Simplified Block ------------------------------------ 107

13.1. Overall Control Diagram------------------------------ 107

14 Block Diagram ------------------------------------------------- 108

14.1. SYSTEM CONTROL & AUDIO (1/2) BLOCK

DIAGRAM ------------------------------------------------ 108

14.2. SYSTEM CONTROL & AUDIO (2/2) BLOCK

DIAGRAM ------------------------------------------------ 109

14.3. HDMI BLOCK DIAGRAM -----------------------------110
14.4. IC TERMINAL CHART---------------------------------111
14.5. POWER SUPPLY (1/2) BLOCK DIAGRAM ------112
14.6. POWER SUPPLY (2/2) BLOCK DIAGRAM ------113

15 Wiring Connection Diagram ------------------------------- 114
16 Schematic Diagram------------------------------------------- 115

16.1. Schematic Diagram Notes ----------------------------115
16.2. MAIN (MICON) CIRCUIT (1/4)-----------------------117
16.3. MAIN (MICON) CIRCUIT (2/4)-----------------------118
16.4. MAIN (MICON) CIRCUIT (3/4)-----------------------119
16.5. MAIN (MICON) CIRCUIT (4/4)---------------------- 120
16.6. MAIN (DAMP) CIRCUIT (1/3) ----------------------- 121
16.7. MAIN (DAMP) CIRCUIT (2/3) ----------------------- 122
16.8. MAIN (DAMP) CIRCUIT (3/3) ----------------------- 123
16.9. BUTTON, SENSOR & TILT SWITCH

CIRCUIT-------------------------------------------------- 124

16.10. LED & AC Inlet CIRCUIT----------------------------- 125

16.11. SMPS CIRCUIT ---------------------------------------- 126

16.12. HDMI CIRCUIT (1/2) ---------------------------------- 127
16.13. HDMI CIRCUIT (2/2) ---------------------------------- 128

17 Printed Circuit Board ---------------------------------------- 129

17.1. Main P.C.B. (Side A) ---------------------------------- 129

17.2. Main P.C.B. (Side B)  ---------------------------------- 130
17.3. BUTTON, SENSOR, LED & TILT SWITCH

P.C.B. ----------------------------------------------------- 131

17.4. SMPS & AC INLET P.C.B. --------------------------- 132
17.5. HDMI P.C.B. --------------------------------------------- 133

18 Appendix Information of Schematic Diagram ------- 135

18.1. Voltage Measurement & Waveform Chart -------- 135

19 Exploded View and Replacement Parts List---------- 141

19.1. Exploded View and Mechanical Replacement

Parts List -------------------------------------------------- 141

19.2. Electrical Replacement Parts List ------------------ 147

3

1. IMPORTANT SAFETY NOTICE

There are special components used in this equipment which are important for safety. These parts are marked by   in the
Schematic Diagrams, Circuit Board Layout, Exploded Views and Replacement Parts List. It is essential that these critical parts
should be replaced with manufacturer’s specified parts to prevent X-RADIATION, shock, fire, or other hazards. Do not modify
the original design without permission of manufacturer.

2. An Isolation Transformer should always be used during the servicing of AC Adaptor whose chassis is not isolated from the AC

power line. Use a transformer of adequate power rating as this protects the technician from accidents resulting in personal
injury from electrical shocks. It will also protect AC Adaptor from being damaged by accidental shorting that may occur during
servicing.

3. 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.

4. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly

installed.

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

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 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 1M

Ω and 5.2Ω. When the exposed metal does not have a return path to the chassis,

the reading must be 

1. Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check.
2. Connect a 1.5k

Ω, 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 1-1.

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.

Figure 1-1

4

Disconnect AC power to discharge unit AC Capacitors (C5701, C5702, C5703, C5704, C5705 and C5706) through a 10W, 1W
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 220 V ~ 240 V, 50 Hz during power at volume minimum, (Selector : BD/DVD mode) should be ~800

mA.

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.

Figure 1-2