Panasonic SHFX71 - WIRELESS SYSTEM User manual

© Panasonic Corporation 2010. All rights reserved.
Unauthorized copying and distribution is a violation
of law.
PSG1002003CE
Wireless System
Model No. SH-FX71GC
SH-FX71GN
Product Color: (K)...Black Type
TABLE OF CONTENTS
PAGE PAGE
1 Safety Precautions----------------------------------------------- 2
1.1. General Guidelines---------------------------------------- 2
1.2. Before Repair and Adjustment ------------------------- 3
1.3. Protection Circuitry ---------------------------------------- 3
1.4. Safety Part Information----------------------------------- 3
2 Warning -------------------------------------------------------------- 4
2.1. Prevention of Electro Static Discharge (ESD)
to Electrostatically Sensitive (ES) Devices---------- 4
2.2. Service caution based on Legal restrictions -------- 5
3 Service Navigation ----------------------------------------------- 6
3.1. Service Hint ------------------------------------------------- 6
4 Specifications ----------------------------------------------------- 7
5 Operating Instructions------------------------------------------ 8
5.1. Digital Transmitter connection-------------------------- 8
5.2. Surround Speakers connection to the Digital
Receiver ----------------------------------------------------- 8
5.3. AC Power Supply Cord connection ------------------- 8
5.4. Making the Wireless link --------------------------------- 8
6 Service Mode ------------------------------------------------------ 9
6.1. Service Mode Table 1 ------------------------------------ 9
7 Disassembly and Assembly Instructions ---------------10
7.1. Main Parts Location Diagram--------------------------11
7.2. Disassembly flow chart----------------------------------12
7.3. Disassembly of Digital Receiver ----------------------13
8 Service Position -------------------------------------------------18
8.1. Checking & Repairing LED Drive P.C.B. and
LED P.C.B.------------------------------------------------- 18
8.2. Checking & Repairing D-AMP P.C.B. --------------- 18
9 Voltage Measurement & Waveform Chart--------------- 19
9.1. D-AMP P.C.B. --------------------------------------------- 19
9.2. LED P.C.B.------------------------------------------------- 19
9.3. Waveform Chart ------------------------------------------ 19
10 Illustration of IC’s, Transistors and Diodes ------------ 20
11 Block Diagram --------------------------------------------------- 21
11.1. RECEIVER BLOCK DIAGRAM----------------------- 21
12 Wiring Connection Diagram--------------------------------- 23
12.1. Digital Receiver------------------------------------------- 23
13 Schematic Diagram Notes ----------------------------------- 24
14 Schematic Diagram -------------------------------------------- 25
14.1. D-AMP CIRCUIT ---------------------------------------- 25
14.2. LED DRIVE CIRCUIT and LED CIRCUIT-------- 26
15 Printed Circuit Board ------------------------------------------ 27
15.1. D-AMP P.C.B., LED DRIVE P.C.B. and LED
P.C.B. ------------------------------------------------------- 27
16 Exploded View and Replacement Parts List ----------- 29
16.1. Exploded View and Mechanical Replacement
Parts List --------------------------------------------------- 29
16.2. Electrical Replacement Parts List-------------------- 34

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, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly
installed.
3. After servicing, carry out the following leakage current checks to prevent the customer 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. 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 5.2MΩ. When the exposed metal does not have a return path to the chas-
sis, 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 1.5kΩ, 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.
Figure. 1

3
1.2. Before Repair and Adjustment
This model uses switching mode power supply (SMPS) module to provide the necessary voltages for the Digital Receiver
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 110 V to 240 V, at 50/60 Hz in NO SIGNAL mode (at volume minimum) should be ~200 mA. (GC
only)
• Current consumption at AC 220 V to 240 V, at 50 Hz in NO SIGNAL mode (at volume minimum) should be ~200 mA. (GN only)
1.3. Protection Circuitry
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.
1.4. Safety Part Information
Safety Parts List:
There are special components used in this equipment which are important for safety.
These parts are marked by in the Schematic Diagrams, Exploded View & Replacement Parts List. It is essential that these
critical parts should be replaced with manufacturer’s specified parts to prevent shock, fire or other hazards. Do not modify the
original design without permission of manufacturer.
Table 1
Safety Ref. No. Part No. Part Name & Description Remarks
11 RGNX1088-K NAME PLATE STICKER GN
11 RGNX1086-K NAME PLATE STICKER GC
18 N0AE3GJ00001 SMPS MODULE P.C.B.
A1 K2CJ2DA00010 AC CORD GN
A1 K2CP2CA00001 AC CORD /W TAG GC
A1 K2CQ2CA00007 AC CORD (2PIN) GC
A1 K2CZ3YY00005 AC CORD (3PIN) GC
A2 RQTX1132-G O/I BOOK (Sp,Cn,Ru,Ur) GC
A2 RQTX1140-B O/I BOOK (En)
A5 RFAX1012D TRANSMITTER UNIT GC
A5 RFAX1012E TRANSMITTER UNIT GN
A7 J0KG00000037 FERRITE CORE
PCB1 REPX0771B DIGITAL RECEIVER MODULE (RX) P.C.B.

4
2Warning
2.1. Prevention of Electro Static Discharge (ESD) to Electrostatically Sensi-
tive (ES) Devices
Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Elec-
trostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and
semiconductor “chip” components. The following techniques should be used to help reduce the incidence of component damage
caused by electrostatic discharge (ESD).
1. Immediately before handling any semiconductor component or semiconductor-equiped assembly, drain off any ESD on your
body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging ESD wrist strap,
which should be removed for potential shock reasons prior to applying power to the unit under test.
2. After removing an electrical assembly equiped with ES devices, place the assembly on a conductive surface such as alumin-
ium foil, to prevent electrostatic charge build up or exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.
4. Use only an anti-static solder remover device. Some solder removal devices not classified as “anti-static (ESD protected)” can
generate electrical charge sufficient to damage ES devices.
5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices.
6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most
replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminium foil or compara-
ble conductive material).
7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material
to the chassis or circuit assembly into which the device will be installed.
Caution :
Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the
brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD) suf-
ficient to damage an ES device).

5
2.2. Service caution based on Legal restrictions
2.2.1. General description about Lead Free Solder (PbF)
The lead free solder has been used in the mounting process of all electrical components on the printed circuit boards used for this
equipment in considering the globally environmental conservation.
The normal solder is the alloy of tin (Sn) and lead (Pb). On the other hand, the lead free solder is the alloy mainly consists of tin
(Sn), silver (Ag) and Copper (Cu), and the melting point of the lead free solder is higher approx.30 degrees C (86°F) more than that
of the normal solder.
Definition of PCB Lead Free Solder being used
Service caution for repair work using Lead Free Solder (PbF)
• The lead free solder has to be used when repairing the equipment for which the lead free solder is used.
(Definition: The letter of “PbF” is printed on the PCB using the lead free solder.)
• To put lead free solder, it should be well molten and mixed with the original lead free solder.
• Remove the remaining lead free solder on the PCB cleanly for soldering of the new IC.
• Since the melting point of the lead free solder is higher than that of the normal lead solder, it takes the longer time to melt the
lead free solder.
• Use the soldering iron (more than 70W) equipped with the temperature control after setting the temperature at 350±30 degrees
C (662±86°F).
Recommended Lead Free Solder (Service Parts Route.)
• The following 3 types of lead free solder are available through the service parts route.
RFKZ03D01K-----------(0.3mm 100g Reel)
RFKZ06D01K-----------(0.6mm 100g Reel)
RFKZ10D01K-----------(1.0mm 100g Reel)
Note
* Ingredient: Tin (Sn), 96.5%, Silver (Ag) 3.0%, Copper (Cu) 0.5%, Cobalt (Co) / Germanium (Ge) 0.1 to 0.3%
The letter of “PbF” is printed either foil side or components side on the PCB using the lead free solder.
(See right figure)

6
3 Service Navigation
3.1. Service Hint
3.1.1. Power supply
This model uses Switching Mode Power Supply (SMPS) Module for powering the receiver unit. It is replaceable as an assembly
unit. (Part No : N0AE3GJ00001) Do not attempt to repair or its component on board.
3.1.2. Digital Transmitter Unit / Digital Receiver Module (Rx) P.C.B. Replacement
1. This Model uses Digital Transmitter Unit & Digital Receiver Module (Rx) P.C.B. for the wireless transmission of signals.
2. After replacement of either Digital Transmitter Unit or Digital Receiver Module (Rx) P.C.B., ID setting is required. Refer to sec-
tion 6.1 Service Mode Table 1 for the procedures for ID setting.
3.1.3. Wireless System Compatibility
SH-FX71 wireless system is not compatible with SH-FX65, SH-FX67 or SH-FX70 wireless system (Digital Transmitter & Digital
Receiver.

7
4 Specifications
QAmplifier Section
RMS output power
Surround Ch 125 W per channel (3 Ω), 1 kHz,
10 % THD
Total RMS power 250 W
DIN output power
Surround Ch 70 W per channel (3 Ω),1 kHz,
1 % THD
Total DIN power 140 W
QGeneral
Power supply
(For GC Only) AC 110V to 240V, 50/60 Hz
(For GN Only) AC 220V to 240V, 50 Hz
Power consumption
Digital transmitter 1.2 W
Wireless system 43 W
Dimensions (W x H x D)
Digital transmitter 43.3 mm x 37.3 mm x 8.2 mm
Wireless system 165 mm x 91.5 mm x 164 mm
Mass
Digital transmitter 0.0095 kg
Wireless system 0.695 kg
Wireless module
Frequency range 2.4 GHz to 2.4835 GHz
Number of channels 3
Operating temperature range 0°C to +40°C
Operating humidity range 20% to 80 % RH
(no condensation)
Power consumption in off mode approx. 0.3 W
Notes :
1. Specifications are subject to change without notices. Mass and
dimensions are approximate.
2. Total harmonic distortion is measured by the digital spectrum
analyzer.
Power supply:
This model uses Switching Mode Power Supply (SMPS) Module for
powering the receiver unit. It is replaceable as an assembly unit.

8
5 Operating Instructions
Turn off all equipmend before connection.
Do not connect the AC power supply cord until all other connections are complete.
5.1. Digital Transmitter connection
5.2. Surround Speakers connection to the Digital Receiver
5.3. AC Power Supply Cord connection
5.4. Making the Wireless link

9
6 Service Mode
6.1. Service Mode Table 1
Item Main Unit FL Display Key Operation
Mode Name Description Main Unit Remote control
ID Setting To pair Transmitter Unit & Digital
Receiver
[SELECTOR]
1. Select DVD/CD mode .
Note :
Unpaired :
- Digital Receiver indicator will be red.
- Main Unit will be blinking .
2. Press & hold [STOP] on main unit,
followed by [2] on remote control.
Note : System will go info pairing
mode for 60 secs only, after 60 secs
FL display will return to its previous
display.
[STOP] [2]
3. During Pairing mode, press “ID Set”
button on the rear side of Digital
Receiver.
Note :
Successful Pairing :
- Digital Receiver indicator will turn red
to green.
- Main Unit will stop blinking.
2. To cancel pairing, press & hold
[STOP] on main unit, followed by [2]
on remote control.
[STOP] [2]

10
7 Disassembly and Assembly Instructions
Caution Note:
• This section describes the disassembly and/or assembly procedures for all major printed circuit boards & main compo-
nents for the unit. (You may refer to the section of “Main components and P.C.B Locations” as described in the service
manual)
• Before carrying out the disassembly process, please ensure all the safety precautions & procedures are followed.
• During the disassembly and/or assembly process, please handle with care as there may be chassis components with
sharp edges.
• Avoid touching heatsinks due to its high temperature after prolong use. (See caution as described below)
• During disassembly and assembly, please ensure proper service tools, equipments or jigs is being used.
• During replacement of component parts, please refer to the section of “Replacement Parts List” as described in the
service manual.
• Select items from the following indexes when disassembly or replacement are required.
• Disassembly of Top Cabinet Ass’y
• Disassembly of LED Drive P.C.B. and LED P.C.B.
• Disassembly of SMPS Module P.C.B.
• Disassembly of D-AMP P.C.B.
• Disassembly of Digital Amp IC (IC5200)
• Disassembly of Digital Receiver Module (Rx) P.C.B.
Caution: SMPS Module P.C.B. Replacement
This model uses SMPS Module P.C.B. to provide the necessary supply voltages for the Digital Receiver.
It is advisable to replace the SMPS Module P.C.B. if upon detecting of non-working conditions. Do not attempt to repair or replace
its components on board.

11
7.1. Main Parts Location Diagram

12
7.2. Disassembly flow chart
The following chart is the procedure for disassembling the casing and inside parts for internal inspection when carrying out the ser-
vicing.
To assemble the unit, reverse the steps shown in the chart below.

13
7.3. Disassembly of Digital
Receiver
7.3.1. Disassembly of Top Cabinet Ass’y
Step 1 : Remove 3 screws.
Step 2 : Upset the unit and remove 4 screws.
Step 3 : Lift up slightly theTop Cabinet Ass’y.
Caution : Do not apply strong force when lifting up the Top
Cabinet Ass’y to avoid damage of the wire & wire connec-
tor at CN1003
Step 4 : Detach 5P cable at connector (CN1003).
Step 5 : Push back slightly before lifting the Top Cabinet Ass’y
entirely.

14
7.3.2. Disassembly of LED Drive P.C.B.
and LED P.C.B.
• Follow the (Step 1) - (Step 5) of item 7.3.1.
•Disassembly of LED Drive P.C.B.
Step 1 : Remove the 5P wire from the slot at LED Drive P.C.B..
Step 2 : Remove 1 screw.
Step 3 : Release the catch and remove the LED Drive P.C.B..
Caution 1 : Do not apply strong force in releasing the
catches to avoid damage of the catches.
Caution 2 : Power Button will be released after removing
LED Drive P.C.B. Keep it in safe place & install during asse-
bling.
•Disassembly of LED P.C.B.
Step 4 : Release the catches and remove the LED P.C.B..
Caution : Do not apply strong force in releasing the
catches to avoid damage of the catches.

15
7.3.3. Disassembly of SMPS Module
P.C.B.
• Follow the (Step 1) - (Step 5) of item 7.3.1.
Step 1 : Detach 7P cable at connector (CN2).
Step 2 : Remove 3 screws.
Step 3 : Slide SMPS Module P.C.B. out from the clutch.
Caution : During assembling, ensure the SMPS Module
P.C.B. is seated properly.
7.3.4. Disassembly of D-AMP P.C.B.
• Follow the (Step 1) - (Step 5) of item 7.3.1.
Step 1 : Detach 7P cable at connector (CN2).
Step 2 : Remove 3 screws.
Step 3 : Remove D-AMP P.C.B..

16
7.3.5. Disassembly of D-Amp IC (IC5200)
• Follow the (Step 1) - (Step 5) of item 7.3.1.
• Follow the (Step 1) - (Step 3) of item 7.3.4.
Step 1 : Remove Heat Sink Clip.
Step 2 : Flip over D-Amp P.C.B..
Step 3 : De-solder pins of D-Amp IC (IC5200).
Step 4 : Remove IC5200.
Caution : Ensure the pins of D-Amp IC are properly seated
& soldered on D-Amp P.C.B. during assembly.

17
7.3.6. Disassembly of Digital Receiver
Module (Rx) P.C.B.
• Follow the (Step 1) - (Step 5) of item 7.3.1.
Step 1 : Pull both the P.C.B holders outwards.
Step 2 : Lift up to remove the Digital Receiver Module (Rx)
P. C . B . .

18
8 Service Position
Note: For description of the disassembly procedures, see the Section 7.
8.1. Checking & Repairing LED
Drive P.C.B. and LED P.C.B.
Step 1 : Remove the Top Cabinet.
Step 2 : Attach 5P cable from LED Driver P.C.B. to the D-AMP
P.C.B. (CN1003).
8.2. Checking & Repairing D-AMP
P. C . B .
Step 1 : Remove the Top Cabinet.
Step 2 : Remove the D-AMP P.C.B..
Step 3 : Flip over D-AMP P.C.B..
Step 4 : Attach 5P cable from LED Driver P.C.B. to the D-AMP
P.C.B. (CN1003).

19
9 Voltage Measurement & Waveform Chart
Note:
• Indicated voltage values are the standard values for the unit measured by the DC electronic circuit tester (high-impedance) with
the chassis taken as standard.
Therefore, there may exist some errors in the voltage values, depending on the internal impedance of the DC circuit tester.
• Circuit voltage and waveform described herein shall be regarded as reference information when probing defect point because it
may differ from actual measuring value due to difference of Measuring instrument and its measuring condition and product itself.
9.1. D-AMP P.C.B.
9.2. LED P.C.B.
9.3. Waveform Chart
REF NO.
MODE 1234567891011121314151617181920
CD PLAY -21.0 0 0 29.5 0 -29.5 0 30.0 0 0 -29.5 -29.5 -29.5 0 0 29.5 -29.5 -29.5 0 29.5
STANDBY -21.0 0 0 29.5 0 -29.8 0 29.5 0 0 -29.5 -29.5 -29.8 0 0 29.5 -29.5 -29.5 0 29.5
REF NO.
MODE 21 22 23
CD PLAY 0 0 5.0
STANDBY 0 0 0
REF NO.
MODE E C B E C B E C B E C B E C B
CD PLAY 5.0 5.0 5.0 0 0 0 0 5.0 0 0 3.3 0 0 3.3 0
STANDBY 5.0 0 0 0 0 5.0 0 0 5.0 0 3.3 0 0 3.3 0
Q1008
SH-FX71GC/GN D-AMP P.C.B.
IC5200
IC5200
Q1004 Q1005 Q1006
Q1007
REF NO.
MODE E C B E C B
CD PLAY 0 5.0 5.0 5.0 5.0 0
STANDBY 0 0 0 0 0 5.0
SH-FX71GC/GN LED DRIVE P.C.B.
Q4000
Q4001
WF No. IC5200-10,14 (PLAY)
60Vp-p(1usec/div)
WF No. IC5200-2,3,21,22 (PLAY)
1.1Vp-p(200usec/div)

20
10 Illustration of IC’s, Transistors and Diodes
MA2J1110GL
A
Ca
Cathode
Anode
C1BA00000497
B3AGA0000124
Anode
Anode
Cathode
A A
Ca
B1ABCF000176
B1ADCE000012
B1GBCFGG0030
B1GBCFJJ0051
B1GDCFGG0026
B
E
C
22
23
1
2