DOWNLOAD Panasonic SA-PT170EE / SC-PT175EE (serv.man2) Service Manual ↓ Size: 1.39 MB | Pages: 25 in PDF or view online for FREE

Model
SA-PT170EE SC-PT175EE (serv.man2)
Pages
25
Size
1.39 MB
Type
PDF
Document
Simplified Service Manual
Brand
Device
Audio / DVD HOME THEATER SOUND SYSTEM
File
sa-pt170ee-sc-pt175ee-sm2.pdf
Date

Panasonic SA-PT170EE / SC-PT175EE (serv.man2) Simplified Service Manual ▷ View online

PSG0905015AE
DVD Home Theater Sound System
Model No.
SA-PT170EE
SC-PT175EE
Product Color:  (K/K1)...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
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
3 Service Navigation --------------------------------------------- 10
3.1. Service Information -------------------------------------- 10
Notes: This model is based on SA-PT170EE-K. Please refer to the original service manual (Order no.
PSG0905014CE).
2
3.2. Notes: ------------------------------------------------------- 11
4 Specifications ---------------------------------------------------- 12
5 Schematic Diagram--------------------------------------------- 15
5.1. Main Circuit ------------------------------------------------ 15
6 Printed Circuit Board ------------------------------------------ 19
6.1. Main P.C.B. ------------------------------------------------ 19
7 Exploded View and Replacement Parts List ----------- 21
7.1. Exploded View and Mechanical Replacement
Part List ----------------------------------------------------- 21
7.2. Electrical Replacement Part List --------------------- 25
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
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
 and 5.2M
.
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
, 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)
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
1.2.
Before Repair and Adjustment
Disconnect AC power to discharge unit AC Capacitors as such (C5700, C5701, C5702, C5706, C5707, C5708) through a 10 
, 10
W resistor to ground.
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 volume minimal 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.
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 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.
Safety
Ref. No.
Part No.
Part Name & Description
Remarks
18
RGRX0071D-B2
REAR PANEL
31
RKMX0141-1K3
TOP CABINET 
50
REXX0728
BLACK WIRE (SMPS-AC)
51
REXX0730
RED WIRE (SMPS-AC)
301
RD-DDTX001-V
TRAVERSE UNIT
(RTL)
A2
K2CQ2CA00007
AC CORD
A3
RQTX0247-R
O/I BOOK (Ru/Ur)
Page of 25
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Panasonic SA-PT170EE / SC-PT175EE (serv.man2) Simplified Service Manual ▷ Download

  • DOWNLOAD Panasonic SA-PT170EE / SC-PT175EE (serv.man2) Service Manual ↓ Size: 1.39 MB | Pages: 25 in PDF or view online for FREE
  • Here you can View online or download the Simplified Service Manual for the Panasonic SA-PT170EE / SC-PT175EE (serv.man2) in PDF for free, which will help you to disassemble, recover, fix and repair Panasonic SA-PT170EE / SC-PT175EE (serv.man2) Audio. Information contained in Panasonic SA-PT170EE / SC-PT175EE (serv.man2) Simplified Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.