SC-HTX5EB, SC-HTX5EG, SU-HTX5EB, SU-HTX5EG - Panasonic Audio Service Manual (repair manual)

PSG0905010CE

Product Color: (K)...Black Type

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1 Safety Precautions----------------------------------------------- 3

1.1. General Guidelines---------------------------------------- 3
1.2. Caution for AC Cord -------------------------------------- 4
1.3. Before Repair and Adjustment ------------------------- 5
1.4. Caution For Fuse Replacement------------------------ 5
1.5. Protection Circuitry ---------------------------------------- 5
1.6. Safety Part Information----------------------------------- 5

2 Warning -------------------------------------------------------------- 7

2.1. Prevention of Electro Static Discharge (ESD)

to Electrostaticy Sensitive (ES) Devices---------- 7

2.2. Service caution based on Legal restrictions -------- 8

3 Service Navigation ----------------------------------------------- 9

3.1. Service Information --------------------------------------- 9

4 Specifications ---------------------------------------------------- 10
5 Location of Controls and Components------------------ 11

5.1. The System (Rack) Buttons Operation ------------- 11
5.2. Remote Control Key Buttons Operation------------ 12

6 Instation -------------------------------------------------------- 13

6.1. Basic Connections --------------------------------------- 14
6.2. AC power supply connection ------------------------- 17

7 Self diagnosis and special mode setting --------------- 18

7.1. Automaticy Displayed Error Codes--------------- 18
7.2. Display Details -------------------------------------------- 18
7.3. Activating Service Mode-------------------------------- 19
7.4. Checking 2.1 ch output of analog signal ----------- 19
7.5. Activating Doctor Mode--------------------------------- 19

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7.6. Inspection Mode------------------------------------------ 20
7.7. Returning to Normal Display -------------------------- 20

8 Troubleshooting Guide---------------------------------------- 21

8.1. HDMI Troubleshooting Guide ------------------------- 21

9 Service Fixture & Tools --------------------------------------- 22

10 Disassembly and Assembly Instructions--------------- 23

10.1. Disassembly flow chart --------------------------------- 25
10.2. Main Parts Location Diagram ------------------------- 26
10.3. Rack Unit  -------------------------------------------------- 28
10.4. Main Unit --------------------------------------------------- 53

11 Service Position ------------------------------------------------- 78

11.1. Checking & Repairing Main P.C.B. ------------------ 78
11.2. Checking & Repairing D-AMP P.C.B. --------------- 79
11.3. Checking & Repairing SMPS P.C.B. ---------------- 82
11.4. Checking & Repairing HDMI P.C.B. ----------------- 83
11.5. Checking & Repairing DSP P.C.B.------------------- 85
11.6. Checking & Repairing Panel P.C.B. ----------------- 85

12 Voltage Measurement & Waveform Chart--------------- 86

12.1. MAIN P.C.B. (1/4) ---------------------------------------- 86
12.2. MAIN P.C.B. (2/4) ---------------------------------------- 87
12.3. MAIN P.C.B. (3/4) ---------------------------------------- 88
12.4. MAIN P.C.B. (4/4) ---------------------------------------- 89
12.5. PANEL P.C.B. --------------------------------------------- 89
12.6. HDMI P.C.B. (1/4) ---------------------------------------- 90
12.7. HDMI P.C.B. (2/4) ---------------------------------------- 91
12.8. HDMI P.C.B. (3/4) ---------------------------------------- 92
12.9. HDMI P.C.B. (4/4) ---------------------------------------- 92

12.10. D-AMP P.C.B. --------------------------------------------- 93

12.11. DSP P.C.B. (1/2)------------------------------------------ 94

12.12. DSP P.C.B. (2/2)------------------------------------------ 95
12.13. SMPS P.C.B. ---------------------------------------------- 96
12.14. Waveform Chart (1/4) ----------------------------------- 97
12.15. Waveform Chart (2/4) ----------------------------------- 98
12.16. Waveform Chart (3/4) ----------------------------------- 99
12.17. Waveform Chart (4/4) --------------------------------- 100

13 Illustration of IC’s, Transistors and Diodes ---------- 101
14 Block Diagram ------------------------------------------------- 102

14.1. HDMI BLOCK DIAGRAM ---------------------------- 102
14.2. IC TERMINAL (HDMI) CHART --------------------- 103
14.3. DSP BLOCK DIAGRAM------------------------------ 104
14.4. IC TERMINAL (DPS) CHART----------------------- 105
14.5. SYSTEM CONTROL BLOCK DIAGRAM -------- 106
14.6. AUDIO BLOCK DIAGRAM -------------------------- 107
14.7. D-AMP BLOCK DIAGRAM -------------------------- 108
14.8. SMPS BLOCK DIAGRAM --------------------------- 109

15 Wiring Connection Diagram ------------------------------- 110
16 Schematic Diagram Notes ----------------------------------111
17 Schematic Diagram------------------------------------------- 112

17.1. HDMI CIRCUIT (1/4) -----------------------------------112
17.2. HDMI CIRCUIT (2/4) -----------------------------------113
17.3. HDMI CIRCUIT (3/4) -----------------------------------114
17.4. HDMI CIRCUIT (4/4) -----------------------------------115
17.5. DSP CIRCUIT (1/2)-------------------------------------116
17.6. DPS CIRCUIT (2/2)-------------------------------------117
17.7. MAIN CIRCUIT (1/4) -----------------------------------118
17.8. MAIN CIRCUIT (2/4) -----------------------------------119
17.9. MAIN CIRCUIT (3/4) ---------------------------------- 120

17.10. MAIN CIRCUIT (4/4) ---------------------------------- 121

17.11. PANEL CIRCUIT / SENSOR CIRCUIT ----------- 122

17.12. RELAY(P) CIRCUIT / WIRELESS ADAPTER

CIRCUIT / RELAY(W) CIRCUIT / AC INLET
CIRCUIT --------------------------------------------------123

17.13. D-AMP CIRCUIT (1/2)---------------------------------124
17.14. D-AMP CIRCUIT (2/2)---------------------------------125
17.15. SMPS CIRCUIT (1/2)----------------------------------126
17.16. SMPS CIRCUIT (2/2)----------------------------------127

18 Printed Circuit Board-----------------------------------------128

18.1. HDMI P.C.B. (1/2)--------------------------------------- 128
18.2. HDMI P.C.B. (2/2)--------------------------------------- 129
18.3. DSP P.C.B. -----------------------------------------------130
18.4. MAIN P.C.B.----------------------------------------------131
18.5. PANEL P.C.B. / SENSOR P.C.B. / RELAY(P)

P.C.B. / WIRELESS ADAPTER P.C.B. / AC
INLET P.C.B. / RELAY(W) P.C.B.-------------------132

18.6. D-AMP P.C.B.--------------------------------------------133
18.7. SMPS P.C.B.---------------------------------------------134

19 Terminal Function of IC’s -----------------------------------135

19.1. IC4301 (RFKWMUHTX5EB) IC

MICROPROCESSOR ---------------------------------135

20 Exploded View and Replacement Parts List----------136

20.1. Exploded View and Mechanical replacement

Parts List --------------------------------------------------136

20.2. Electrical Replacement Parts List ------------------141

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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.

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.

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.

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