Panasonic SC-ZT2EE / SC-ZT2GS / SU-ZT2EE / SU-ZT2GS / SB-ZT2EE / SB-ZT2GS Service Manual ▷ View online
PSG1005041CE
Home Theater Audio System
Model No.
SC-ZT2EE
SC-ZT2GS
SU-ZT2EE
SU-ZT2GS
SB-ZT2EE
SB-ZT2GS
SC-ZT2GS
SU-ZT2EE
SU-ZT2GS
SB-ZT2EE
SB-ZT2GS
Product Color: (K)...Black Type (SC-ZT2/SU-ZT2)
(K1)...Black Type (SB-ZT2)
2
TABLE OF CONTENTS
PAGE
PAGE
1 Safety Precautions -----------------------------------------------3
1.1. General Guidelines ----------------------------------------3
1.2. Before Repair and Adjustment--------------------------4
1.3. Caution for Fuse Replacement -------------------------4
1.4. Protection Circuitry-----------------------------------------4
1.5. Safety Part Information -----------------------------------4
1.2. Before Repair and Adjustment--------------------------4
1.3. Caution for Fuse Replacement -------------------------4
1.4. Protection Circuitry-----------------------------------------4
1.5. Safety Part Information -----------------------------------4
2 Warning --------------------------------------------------------------6
2.1. Prevention of Electro Static Discharge (ESD)
to Electrostatically Sensitive (ES) Devices ----------6
2.2. Service caution based on Legal restrictions---------7
3 Service Navigation------------------------------------------------8
3.1. Service Information ----------------------------------------8
4 Specifications ------------------------------------------------------9
4.1. Main Unit (SU-ZT2)----------------------------------------9
4.2. Speaker Unit (SB-ZT2) -----------------------------------9
4.2. Speaker Unit (SB-ZT2) -----------------------------------9
5 Location of Controls and Components------------------ 10
5.1. Main Unit (SU-ZT2)-------------------------------------- 10
5.2. Speaker Unit (SB-ZT2) --------------------------------- 11
5.3. Remote Control------------------------------------------- 11
5.2. Speaker Unit (SB-ZT2) --------------------------------- 11
5.3. Remote Control------------------------------------------- 11
6 Installation--------------------------------------------------------- 12
6.1. Basic Connections --------------------------------------- 13
6.2. AC power supply connection ------------------------- 17
6.2. AC power supply connection ------------------------- 17
7 Speaker setting (SB-ZT2)------------------------------------- 18
7.1. Setting the speakers (Front and Surround
speakers)--------------------------------------------------- 18
7.2. Setting surround speakers----------------------------- 20
7.3. Initialize the Speaker Setting -------------------------- 21
7.3. Initialize the Speaker Setting -------------------------- 21
8 Self-diagnostic and special mode setting -------------- 22
8.1. Activating Service Mode-------------------------------- 22
8.2. Activating Doctor Mode--------------------------------- 22
8.3. Error Codes Display List-------------------------------- 22
8.4. Inspection Mode------------------------------------------ 23
8.5. Returning to Normal Display -------------------------- 24
8.2. Activating Doctor Mode--------------------------------- 22
8.3. Error Codes Display List-------------------------------- 22
8.4. Inspection Mode------------------------------------------ 23
8.5. Returning to Normal Display -------------------------- 24
9 Troubleshooting ------------------------------------------------- 25
9.1. HDMI Checking Method -------------------------------- 25
9.2. Troubleshooting Flow Chart --------------------------- 27
9.2. Troubleshooting Flow Chart --------------------------- 27
10 Disassembly and Assembly Instructions--------------- 31
10.1. Main Parts Location Diagram ------------------------- 33
10.2. Disassembly flow chart --------------------------------- 35
10.3. Main Unit (SU-ZT2)-------------------------------------- 37
10.4. Speaker Unit (SB-ZT2) --------------------------------- 48
10.2. Disassembly flow chart --------------------------------- 35
10.3. Main Unit (SU-ZT2)-------------------------------------- 37
10.4. Speaker Unit (SB-ZT2) --------------------------------- 48
11 Service Position ----------------------------------------------- 106
11.1. Main Unit (SU-ZT2)------------------------------------ 106
11.2. Speaker Unit (SB-ZT2) ------------------------------- 108
11.2. Speaker Unit (SB-ZT2) ------------------------------- 108
12 Voltage Measurement & Waveform Chart------------- 116
12.1. Main Unit (SU-ZT2)-------------------------------------116
12.2. Speaker Unit (SB-ZT2) ------------------------------- 126
12.3. Waveform Chart ---------------------------------------- 128
12.2. Speaker Unit (SB-ZT2) ------------------------------- 126
12.3. Waveform Chart ---------------------------------------- 128
13 Illustration of IC’s, Transistors and Diodes ---------- 131
14 Overall Simplified Block ------------------------------------ 133
14 Overall Simplified Block ------------------------------------ 133
14.1. Signal Flow (SU-ZT2) --------------------------------- 133
15 Block Diagram ------------------------------------------------- 134
15.1. Main Unit (SU-ZT2)------------------------------------ 134
15.2. Speaker Unit (SB-ZT2) ------------------------------- 141
15.2. Speaker Unit (SB-ZT2) ------------------------------- 141
16 Wiring Connection Diagram ------------------------------- 145
16.1. MAIN UNIT (SU-ZT2) --------------------------------- 145
16.2. Speaker Unit (SB-ZT2) ------------------------------- 146
16.2. Speaker Unit (SB-ZT2) ------------------------------- 146
17 Schematic Diagram Notes --------------------------------- 147
18 Schematic Diagram -------------------------------------------149
18.1. Main Unit (SU-ZT2) ------------------------------------149
18.2. Speaker Unit (SB-ZT2) --------------------------------163
18.2. Speaker Unit (SB-ZT2) --------------------------------163
19 Printed Circuit Board-----------------------------------------169
19.1. Main Unit (SU-ZT2) ------------------------------------169
19.2. Speaker Unit (SB-ZT2) --------------------------------173
19.2. Speaker Unit (SB-ZT2) --------------------------------173
20 Terminal Function of IC’s -----------------------------------177
20.1. IC8001 (RFKWMZT2PPK2) MICRO
PROCESSOR -------------------------------------------177
21 Exploded View and Replacement Parts List----------179
21.1. Exploded View and Mechanical Replacement
Parts List --------------------------------------------------179
21.2. Electrical Replacement Parts List ------------------185
3
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 for leakage current checks to prevent the customer from being exposed to shock haz-
ards.
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
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 1mW and 5.2mW. When the exposed metal does not have a return path to the chas-
sis, the reading must be .
chassis, the reading should be between 1mW and 5.2mW. 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 1.5kW, 10 watts resistor, in parallel with a 0.15mF capacitors, between each exposed metallic part on the set and a
2. Connect a 1.5kW, 10 watts resistor, in parallel with a 0.15mF 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)
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.
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.
Fig. 1
4
1.2.
Before Repair and Adjustment
Disconnect AC power, discharge Power Supply Capacitors for :
Main Unit (SU-ZT2)
(C5501, C5502, C5509) through a 10
Main Unit (SU-ZT2)
(C5501, C5502, C5509) through a 10
Ω, 1W resistor to ground.
Speaker Unit (SB-ZT2)
(C5700, C5701, C5703, C5704) through a 10
(C5700, C5701, C5703, C5704) through a 10
Ω, 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.
After repairs are completed, restore power gradually using a variac, to avoid overcurrent.
• Current consumption at AC 110 to 240 V, 50/60 Hz in NO SIGNAL mode should be 100~800 mA.
1.3.
Caution for Fuse Replacement
Main Unit (SU-ZT2)
Speaker Unit (SB-ZT2)
1.4.
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.
• 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:
"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.
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.
When the protection circuitry functions, the unit will not operate unless the power is first turned off and then on again.
1.5.
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.
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.