Panasonic SA-VK950EE Service Manual ▷ View online
1 Safety Precautions
6
1.1.
General Guidelines
6
1.2.
Safety Precaution for AC Power Supply Cord
7
1.3.
Before Repair and Adjustment
7
1.4.
Protection Circuitry
7
2 Prevention of Electro Static Discharge (ESD) to
Electrostatically Sensitive (ES) Devices
8
3 Handling Precautions for Traverse Unit
9
3.1.
Handling Optical Pickup
9
3.2.
Replacing Precautions for Optical Pickup Unit
9
3.3.
Grounding for Preventing Electrostatic Destruction
9
4 Precaution of Laser Diode
10
5 Warning
11
5.1.
Service caution based on legal restrictions
11
6 Accessories
12
7 Operation Procedures
13
7.1.
Main Unit Operation Control
13
7.2.
Remote Control Operation Control
14
7.3.
Disc Information
15
7.4.
DivX VOD Content
17
8 New Features
18
8.1.
CRS1D Mechanism Overview
18
8.2.
Music Port
20
9 About HighMAT
21
9.1.
What 痴 HighMAT?
21
9.2.
Why take advantage of HighMAT?
21
9.3.
Benefits of HighMAT?
22
10 Self diagnosis and special mode setting
25
10.1. Service Mode Summary Table
25
10.2. Service Mode Table 1
25
10.3. Special Mode Table 2
33
11 Assembling and Disassembling
41
11.1. Caution
41
11.2. Disassembly flow chart
42
11.3. Main Parts Location
43
11.4. Disassembly of Top Cabinet
44
11.5. Disassembly of CD/DVD Changer Unit (CRS1D)
44
11.6. Disassembly of Rear Panel
45
11.7. Disassembly of Main P.C.B.
46
11.8. Disassembly of Front Panel Unit
46
11.9. Disassembly of SMPS P.C.B.
47
11.10. Replacement of Power Amp IC (SMPS P.C.B.)
47
11.11. Disassembly of Digital Amp P.C.B.
48
11.12. Replacement for Power Amp IC (Digital Amp P.C.B.)
48
11.13. Disassembly of Panel P.C.B., Mic P.C.B. & Tact Switch
P.C.B.
49
11.14. Disassembly of Deck mechanism unit
50
11.15. Disassembly of Deck P.C.B.
50
11.16. Disassembly of Traverse Unit
51
11.17. Disassembly of optical pickup unit (CD/DVD mechanism)
52
11.18. Disassembly of Deck Mechanism
54
11.19. Replacement for cassette lid
58
11.20. Rectification for tape jam problem
58
12 Service Fixture and Tools
60
13 Service Positions
60
13.1. Checking and Repairing of Main P.C.B.
60
13.2. Checking and Repairing of SMPS P.C.B. & Digital Amp
P.C.B.
61
13.3. Checking and Repairing of Panel, Deck & Deck
Mechanism P.C.B.
62
14 Adjustment Procedures
63
14.1. Cassette Deck Section
63
14.2. Tuner section
64
14.3. Alignment Points
64
15 Voltage and Waveform Chart
65
15.1. DVD Module P.C.B.
66
15.2. Main P.C.B.
68
15.3. Panel P.C.B.
71
15.4. Deck P.C.B. & Deck Mechanism P.C.B.
72
15.5. Damp P.C.B. & Mic P.C.B.
73
15.6. Waveform Chart
74
16 Wiring Connection Diagram
83
17 Block Diagram
85
18 Notes of Schematic Diagrams
91
19 Schematic Diagram
93
19.1. Optical Pickup Unit Circuit
93
19.2. (A) DVD Module (DV3.2) Circuit
94
19.3. (B) Main Circuit
98
19.4. (C) Panel Circuit
102
19.5. (D) Tact Switch Circuit & (E) Mic Circuit
103
19.6. (F) Damp Circuit
104
19.7. (G) Speaker Circuit
106
19.8. (H) SMPS Circuit
107
19.9. (I) Deck Circuit & (J) Deck Mechanism Circuit
109
20 Printed Circuit Board
111
20.1. (A) DVD Module P.C.B. (Side A & B )
112
20.2. (B) Main P.C.B.
113
20.3. (C) Panel P.C.B.
114
CONTENTS
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SA-VK950EE
20.4. (D) Tact Switch P.C.B., (E) Mic P.C.B., (I) Deck P.C.B. &
(J) Deck Mechanism P.C.B.
115
20.5. (F) Damp P.C.B. & (G) Speaker P.C.B.
116
20.6. (H) SMPS P.C.B.
117
21 Basic Troubleshooting Guide for Backend Module
119
21.1. Firmware and Key Download
119
21.2. Initialisation and Playability
119
22 Illustration of ICs, Transistors and Diodes
120
23 Terminal Function of IC
121
23.1. IC2600 (C2CBYY000269) System Microprocessor
121
24 Exploded Views
123
24.1. Cabinet Parts Location
123
24.2. Deck Mechanism Parts Location (RAA3413-1S)
125
24.3. Packaging
126
25 Replacement Parts List
129
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SA-VK950EE
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, make 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
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 1M
chassis, the reading should be between 1M
Ω and 5.2MΩ.
When the exposed metal does not have a return path to the chassis, the reading must be
.
Figure 1
1.1.2. Leakage Current Hot Check
(See Figure 1)
1. Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check.
2. Connect a 1.5k
2. Connect a 1.5k
Ω, 10 watts resistor, in parallel with a 0.15µF capacitor, 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
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 out 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.
specified, there is a possibility of a shock hazard, and the equipment should be repaired and rechecked before it is returned to
the customer.
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SA-VK950EE
1.2. Safety Precaution for AC Power Supply Cord
1.3. Before Repair and Adjustment
Disconnect AC power, discharge Power Supply Capacitors C2254, C2256, C2288, C2289, C2632, C2721, C2725, C2811, C2815,
C2817, C5512, C5513, C5514, C5712, C5713, C5715, C5718, C5790, C5805, C5806, C5807, C5914, C5916, C5917, C5929,
C5930, C5971 and C5977 through a 10
C2817, C5512, C5513, C5514, C5712, C5713, C5715, C5718, C5790, C5805, C5806, C5807, C5914, C5916, C5917, C5929,
C5930, C5971 and C5977 through a 10
Ω, 5W 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.
Current consumption at AC 230V, 50 Hz in NO SIGNAL (vol. min, at CD mode) should be ~500mA.
After repairs are completed, restore power gradually using a variac, to avoid overcurrent.
Current consumption at AC 230V, 50 Hz in NO SIGNAL (vol. min, at CD mode) should be ~500mA.
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.
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.
· 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.
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SA-VK950EE