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PSG0905010CE

Home Theater Audio System
Model No. SC-HTX5EB
SC-HTX5EG
SU-HTX5EB
SU-HTX5EG
Product Color: (K)...Black Type

TABLE OF CONTENTS
PAGE PAGE
1 Safety Precautions----------------------------------------------- 3 4 Specifications ---------------------------------------------------- 10
1.1. General Guidelines---------------------------------------- 3 5 Location of Controls and Components------------------ 11
1.2. Caution for AC Cord -------------------------------------- 4 5.1. The System (Rack) Buttons Operation ------------- 11
1.3. Before Repair and Adjustment ------------------------- 5 5.2. Remote Control Key Buttons Operation------------ 12
1.4. Caution For Fuse Replacement------------------------ 5 6 Installation -------------------------------------------------------- 13
1.5. Protection Circuitry ---------------------------------------- 5 6.1. Basic Connections --------------------------------------- 14
1.6. Safety Part Information----------------------------------- 5 6.2. AC power supply connection ------------------------- 17
2 Warning -------------------------------------------------------------- 7 7 Self diagnosis and special mode setting --------------- 18
2.1. Prevention of Electro Static Discharge (ESD) 7.1. Automatically Displayed Error Codes --------------- 18
to Electrostatically Sensitive (ES) Devices---------- 7 7.2. Display Details -------------------------------------------- 18
2.2. Service caution based on Legal restrictions -------- 8 7.3. Activating Service Mode-------------------------------- 19
3 Service Navigation ----------------------------------------------- 9 7.4. Checking 2.1 ch output of analog signal ----------- 19
3.1. Service Information --------------------------------------- 9 7.5. Activating Doctor Mode--------------------------------- 19
7.6. Inspection Mode ------------------------------------------ 20 17.12. RELAY(P) CIRCUIT / WIRELESS ADAPTER
7.7. Returning to Normal Display -------------------------- 20 CIRCUIT / RELAY(W) CIRCUIT / AC INLET
8 Troubleshooting Guide---------------------------------------- 21 CIRCUIT -------------------------------------------------- 123
8.1. HDMI Troubleshooting Guide ------------------------- 21 17.13. D-AMP CIRCUIT (1/2)--------------------------------- 124
9 Service Fixture & Tools --------------------------------------- 22 17.14. D-AMP CIRCUIT (2/2)--------------------------------- 125
10 Disassembly and Assembly Instructions --------------- 23 17.15. SMPS CIRCUIT (1/2) ---------------------------------- 126
10.1. Disassembly flow chart --------------------------------- 25 17.16. SMPS CIRCUIT (2/2) ---------------------------------- 127
10.2. Main Parts Location Diagram ------------------------- 26 18 Printed Circuit Board----------------------------------------- 128
10.3. Rack Unit -------------------------------------------------- 28 18.1. HDMI P.C.B. (1/2)--------------------------------------- 128
10.4. Main Unit --------------------------------------------------- 53 18.2. HDMI P.C.B. (2/2)--------------------------------------- 129
11 Service Position ------------------------------------------------- 78 18.3. DSP P.C.B. ----------------------------------------------- 130
11.1. Checking & Repairing Main P.C.B. ------------------ 78 18.4. MAIN P.C.B.---------------------------------------------- 131
11.2. Checking & Repairing D-AMP P.C.B. --------------- 79 18.5. PANEL P.C.B. / SENSOR P.C.B. / RELAY(P)
11.3. Checking & Repairing SMPS P.C.B. ---------------- 82 P.C.B. / WIRELESS ADAPTER P.C.B. / AC
11.4. Checking & Repairing HDMI P.C.B. ----------------- 83 INLET P.C.B. / RELAY(W) P.C.B.------------------- 132
11.5. Checking & Repairing DSP P.C.B.------------------- 85 18.6. D-AMP P.C.B.-------------------------------------------- 133
11.6. Checking & Repairing Panel P.C.B. ----------------- 85 18.7. SMPS P.C.B.--------------------------------------------- 134
12 Voltage Measurement & Waveform Chart--------------- 86 19 Terminal Function of IC's ----------------------------------- 135
12.1. MAIN P.C.B. (1/4) ---------------------------------------- 86 19.1. IC4301 (RFKWMUHTX5EB) IC
12.2. MAIN P.C.B. (2/4) ---------------------------------------- 87 MICROPROCESSOR --------------------------------- 135
12.3. MAIN P.C.B. (3/4) ---------------------------------------- 88 20 Exploded View and Replacement Parts List---------- 136
12.4. MAIN P.C.B. (4/4) ---------------------------------------- 89 20.1. Exploded View and Mechanical replacement
12.5. PANEL P.C.B. --------------------------------------------- 89 Parts List -------------------------------------------------- 136
12.6. HDMI P.C.B. (1/4) ---------------------------------------- 90 20.2. Electrical Replacement Parts List ------------------ 141
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

2
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.

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 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 and 5.2. 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 1.5k, 10 watts resistor, in parallel with a 0.15F 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.

3
1.2. Caution for AC Cord

4
1.3. Before Repair and Adjustment
Disconnect AC power, discharge unit AC Capacitors as such C5700, C5701, C5702, C5703, C5704, C5705 through a 10, 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.