Page 1
1 Safety Precautions 3
1.1. GENERAL GUIDELINES
3
1.2. Before Repair and Adjustment (Digital Receiver SE-
FX61GN)
3
1.3. Protection Circuitry
4
2 Prevention of Electro Static Discharge (ESD) to
Electrostatically Sensitive (ES) Devices
5
3 Handling the Lead-free Solder
6
3.1. Service caution based on legal restrictions
6
4 Accessories
7
5 Using of Digital Receiver Unit
8
5.1. Connecting the digital transceiver (SH-FX80TGN)
8
5.2. Connecting the surround speaker cables to the wireless
system (SE-FX61GN)
8
5.3. AC Power Cord connection (SE-FX61GN)
8
5.4. Making the wireless link (SE-FX61GN)
9
6 Technical Information (Wireless Surround)
10
6.1. RF Wireless Audio Transceiver
10
6.2. Detail Block Diagram (Receiver module)
11
6.3. Class-D Amplifier
15
7 Assembling and Disassembling
18
7.1. Note
18
7.2. Disassembly flow chart (For SE-FX61GN)
19
7.3. Main Parts Location Diagram
19
7.4. Disassembly of Wireless System (SE-FX61GN)
20
7.5. Disassembly of Digital Transceiver (SH-FX80TGN)
25
8 Service Positions
28
8.1. Checking of Led and Receiver Module P.C.B.
28
8.2. Checking of Digital Amp and SMPS Module Unit
29
9 Service Hint
30
9.1. Use of Service Jig (RFKZFX50PP-S)
30
9.2. Procedures for testing of link between digital transmitter &
receiver
31
9.3. Troubleshooting Guide for Wireless Surround Speaker
33 10 Service parts replacement
35
10.1. Replacement of P.C.B.
35
10.2. Replacement of Transmitter Assembly
35
10.3. ID Location
36
10.4. Digital Transceiver Card Service Assembly
(RFKVHFX80TE)
37
11 Voltage Measurement
38
11.1. DIGITAL AMP P.C.B.
38
11.2. LED P.C.B.
38
12 Wiring Connection Diagram
39
13 Block Diagram
41
13.1. DIGITAL AMP MODULE BLOCK
41
13.2. RECEIVER MODULE BLOCK
42
13.3. TRANSIMITTER MODULE BLOCK
43
14 Notes of Schematic Diagram
45
15 Schematic Diagram
47
15.1. DIGITAL AMP CIRCUIT and LED CIRCUIT
47
15.2. RECEIVER MODULE CIRCUIT
48
15.3. TRANSMITTER MODULE CIRCUIT
50
16 Printed Circuit Board Diagram
53
16.1. DIGITAL AMP P.C.B and LED P.C.B
53
16.2. RECEIVER MODULE P.C.B and TRANSMITTER
MODULE P.C.B
54
17 Illustration of IC's, Transistors and Diodes
55
18 Terminal Functions of Integrated Circuits
56
18.1. IC12 (M9Z000000013): IC RF
56
19 Exploded Views
57
19.1. Cabinet Parts Location
57
19.2. Packaging
58
19.3. Main Unit Packaging
59
20 Replacement Parts List
60
20.1. Parts List (SE-FX61GN)
60
20.2. Parts List (SH-FX80TGN)
62
CONTENTS
Page Page
2
SH-HT995 WGN
Page 2
1 Safety Precautions
1.1. GENERAL GUIDELINES
1. Whenservicing, 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
installe d.
3. After servicing, make the following leakage current checks to prevent the customer from being expose d to shock hazards.
1.1.1. LEAKA GECURRENT COLD CHECK
1. Unplug the AC cord and connect a jumper between the two prongs on the plug.
2. Measure the resistance value, with anohmmeter, 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 exposedmetallic part has a return path to the
chassis, the reading should be between 1M-„¦and 5.2-„¦.
When theexpose d metal does not have a return path to the chassis, the reading must be
.
Figure. 1
1.1.2. LEAKA GECURRENT HOT CHECK (See Figure 1.)
1. Plug the AC cord directly into the AC outlet. Do not use an isolatio n transformer for this check.
2. Conne ct a 1.5k-„¦, 10 watts resistor, in parallel with a 0.15µF capacitors, between each expose d 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 expose d 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 notexceed 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.
1.2. Before Repair and Adjustment (Digital Receiver SE-FX61GN)
This model uses switching mode power supply (SMPS) module to provide the necessary voltages for the receiver (SE-FX61GN)
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 consum ption at AC 230-240V, 50Hz in NO SIGNAL mode should be ~150 mA.
This model uses the switching mode power supply unit (SMPS) to provide necessary voltage supply for powering.
3
SH-HT995 WGN
