Read Panasonic SA-PT22EE / SC-PT22EE Service Manual Simplified online
PSG1007014AE
DVD Home Theater Sound System
Model No.
SA-PT22EE
Product Color: (K)...Black Type
TABLE OF CONTENTS
PAGE
PAGE
1 Safety Precautions----------------------------------------------- 3
1.1. GENERAL GUIDELINES -------------------------------- 3
1.2. Before Repair and Adjustment ------------------------- 3
1.3. Protection Circuitry ---------------------------------------- 4
1.4. Safety Parts Information --------------------------------- 4
1.2. Before Repair and Adjustment ------------------------- 3
1.3. Protection Circuitry ---------------------------------------- 4
1.4. Safety Parts Information --------------------------------- 4
2 Warning -------------------------------------------------------------- 5
2.1. Prevention of Electrostatic Discharge (ESD)
to Electrostatic Sensitive (ES) Devices--------------- 5
2.2. Precaution of Laser Diode ------------------------------- 6
2.3. Service caution based on Legal restrictions -------- 7
2.4. Handling Precautions for Traverse Unit -------------- 8
2.3. Service caution based on Legal restrictions -------- 7
2.4. Handling Precautions for Traverse Unit -------------- 8
3 Service Navigation --------------------------------------------- 10
Notes:
1) This model is based on SA-PT22GC/GW-K. Please refer to the original service manual (Order no.
PSG1005025CE).
2) Speaker system SB-PT90EB-K, Order No. PSG1005051CE.
1) This model is based on SA-PT22GC/GW-K. Please refer to the original service manual (Order no.
PSG1005025CE).
2) Speaker system SB-PT90EB-K, Order No. PSG1005051CE.
2
3.1. Service Information -------------------------------------- 10
3.2. Notes -------------------------------------------------------- 10
3.3. Differences Table----------------------------------------- 11
3.2. Notes -------------------------------------------------------- 10
3.3. Differences Table----------------------------------------- 11
4 Specifications ---------------------------------------------------- 12
5 Illustration of ICs, Transistor and Diode ---------------- 14
6 Block Diagram --------------------------------------------------- 15
5 Illustration of ICs, Transistor and Diode ---------------- 14
6 Block Diagram --------------------------------------------------- 15
6.1. DVD(Audio/Video) --------------------------------------- 15
6.2. Power Supply --------------------------------------------- 16
6.2. Power Supply --------------------------------------------- 16
7 Schematic Diagram--------------------------------------------- 18
7.1. DVD Module Circuit-------------------------------------- 18
7.2. Main/D-Amp Circuit -------------------------------------- 22
7.3. FL, Volume Button & Power Button Circuit -------- 28
7.4. Component Video Circuit------------------------------- 29
7.5. SMPS Circuit ---------------------------------------------- 30
7.2. Main/D-Amp Circuit -------------------------------------- 22
7.3. FL, Volume Button & Power Button Circuit -------- 28
7.4. Component Video Circuit------------------------------- 29
7.5. SMPS Circuit ---------------------------------------------- 30
8 Printed Circuit Board ------------------------------------------ 32
8.1. DVD Module P.C.B.-------------------------------------- 32
8.2. Main/D-Amp P.C.B. -------------------------------------- 33
8.3. FL, Volume Button, Power Button &
8.2. Main/D-Amp P.C.B. -------------------------------------- 33
8.3. FL, Volume Button, Power Button &
Component Video P.C.B.------------------------------- 35
8.4. SMPS P.C.B. ---------------------------------------------- 36
9 Exploded View and Replacement Parts List ----------- 37
9.1. Exploded View and Mechanical Replacement
Parts List --------------------------------------------------- 37
9.2. Electrical Replacement Parts List -------------------- 41
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 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 5.2M
Ω
.
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
2. Connect a 1.5k
Ω
, 10 watts resistor, in parallel with a 0.15
µ
F 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. 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.
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
1.2.
Before Repair and Adjustment
Disconnect AC power to discharge unit AC Capacitors as such (C5700, C5701, C5702, C5703, C5704, C5708) through a 10
Ω
, 10
W resistor to ground.
Caution:
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 230 V, 50 Hz in NO SIGNAL mode at volume minimum should be ~ 500 mA.
Current consumption at AC 230 V, 50 Hz in NO SIGNAL mode at volume minimum should be ~ 500 mA.
1.2.1.
Caution for fuse replacement
4
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.
• 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.
1.4.
Safety Parts 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.
original design without permission of manufacturer.
Safety
Ref. No.
Part No.
Part Name & Description
Remarks
9
RGRX0073F-D
REAR PANEL
20
RKMX0151-K
TOP CABINET
401
RAEX1022Z-V
TRAVERSE UNIT
A2
K2CQ2CA00007
AC CORD
A3
RQTX1203-R
O/I BOOK (Ru/Ur)
PCB3
REPX0854B
SMPS P.C.B.
DZ5701
ERZV10V511CS
ZNR
L5701
ELF17N007A
LINE FILTER
L5702
ELF18N006A
LINE FILTER
T2900
G4D1A0000118
SWITCHING TRANSFORMER
T5701
ETS35BC2T6AD
MAIN TRANSFORMER
PC5702
B3PBA0000402
PHOTO COUPLER
PC5720
B3PBA0000402
PHOTO COUPLER
PC5799
B3PBA0000402
PHOTO COUPLER
F1
K5D202BLA013
FUSE
FP2901
K5H1022A0011
PROTECTOR
TH5702
D4CAA5R10001
THERMISTOR
P5701
K2AA2B000011
AC INLET
C5700
F1BAF1020020
1000pF
C5701
F0CAF104A105
0.1uF
C5702
F0CAF104A105
0.1uF
C5703
F0CAF104A105
0.1uF
C5704
F1BAF471A013
470pF
C5708
F1BAF471A013
470pF