Panasonic sc ua3

Page 1

PSG17050090E

Service Manual

CD Stereo System

Model No. SC-UA3E
SC-UA3GN
SC-UA3PR
SC-UA3PU

Product Co|or: (K)...Black Type

Remote 1
Control 1

SC-UA3

Please refer to the original service manual for:
0 CD Mechanism Unit (BRStZC), Order No. PSG1303059AE

A WARNING

This service information is designed for experienced repair technicians only and is not designed for use by the general public.

It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians Any attempt to service
or repair the product or products dealt with in this service information by anyone else could result in serious injury or death.

IMPORTANT SAFETY NOTICE
There are special components used in this equipment which are important for safety. These parts are marked by A in the Schematic
Diagrams, Circuit Board Diagrams, Exploded Views and Replacement Parts List. If is essential that these critical parts should be replaced
with manufacturer's specified pans to prevent shock, fire or other hazards. Do not modify the original design without permission of

manufacturer.

TABLE OF CONTENTS

PAGE
1 Safety Precautions ----------------------------------------------- 3
1.1. General Guidelines ---------------
1.2. Before Repair and Adjustment
1.3. Protection Circuitry ------------------
1.4. Caution For AC Cord (For E/GN)
1.5. Safety Parts Information
2 Warning -----------------------------
2.1. Prevention of Electrostatic Discharge (ESD)
to Electrostatically Sensitive (ES) Devices--

2.2. Precaution of Laser Diode --------------------
2.3. General description about Lead Free Solder

(PbF) ---------------------------------------------------------- 8
2.4. Handling Precautions for Traverse Unit -------------- 8
2.5. Grounding for electrostatic breakdown

prevention

3 Service Navigation

3.1. Service Information
4 Specifications -----------------
5 Location of Controls and Components

Panasonic®

PAGE

5.1. Remote Control Key Button Operation ------------- 12
5.2. Main Unit Key Button Operation

6 Service Mode -------------------------------
6.1. Cold-Start ----------------------------------
6.2. Sales Demonstration Lock Function
6.3. Doctor Mode Table-
6.4. Self-Diagnostic Mode --
6.5. Self-Diagnostic Error Code Table -

7 Troubleshooting Guide ---------
7.1. No Power or No Display--
7.2. Bluetooth® Pairing Failure--
7.3. No Key Function ------------
7.4. No Remote Control Function--
7.5. USB Device Cannot Detect-m
7.6. No Output Sound
7.7. Check Point -------

8 Disassembly and Assembly Instructions--
8.1. Types of Screws ------------
8.2. Disassembly Flow Chart -

© Panasonic Corporation 2017. All rights reserved.
Unauthorized copying and distribution is a violation
of law.

Page 2

8.3. Main Components and PCB. Locations
8.4. Disassembly of Front Panel Unit ----------
8.5. Disassembly of Panel P.C.B.-
8.6. Disassembly of USB P.C.B. --
8.7. Disassembly of Front Speakers (SP5 and
SP6) --------------------------------------------------------- 25
8.8. Disassembly of Front Speakers (SP3 and
SP4) --------------------------------------------------------- 26
8.9. Disassembly of Front Speakers (SP1 and
SP2) -----------------------------
8.10. Disassembly of LED P.C.B.--
8.11. Disassembly of Mic P.C.B. (For E/PR/PU)
8.12. Disassembly of Main P.C.B. ------------------
8.13. Disassembly of SMPS Module ------
8.14. Disassembly of CD Mechanism Unit --
8.15. Disassembly of CD Interface P.C.B.
9 Service Position --------------------------------
9.1. Checking of Main PCB. and SMPS Module
10 Block Diagram ---------
10.1. System Control -
10.2. Audio (1/2) --
10.3. Audio (2/2) --
10.4. Power Supply --------------
11 Wiring Connection Diagram --
12 Schematic Diagram -----------------
12.1. Schematic Diagram Notes-
12.2. Main (Micon) Circuit (1/2) --
12.3. Main (Micon) Circuit (2/2) --
12.4. Main (Connector), Main (Bluetooth) and Main
(Fan LED) Circuit--
12.5. Main (FE) Circuit --
12.6. Main (DAMP) Circuit-
12.7. Main (DSP) Circuit--
12.8. Main (OPTfiSRC) Circuit -------------------------
(
(

26

12.9. Main Tuner AUX) and Main (USB) Circuit --
12.10. Main Voltage Regulator) Circuit -
12.11. Panel Circuit ---------------------------
12.12. Mic (For E/PFt/PU), USB, LED, CD Interface

Circuit -------------
13 Printed Circuit Board

13.1. Main P.C.B. (Side A)-

13.2. Main P.C.B. (Side B)---

13.3. Panel, Mic (For E/PR/PU) and USB P.C.B

13.4. LED and CD Interface P.C.B. --------------

14 Voltage and Waveform Measurement

14.1. Voltage Measurement ---------------

15 Exploded View and Replacement Parts List

15.1. Cabinet Parts Location 1 --------------------

15.2. Cabinet Parts Location 2

15.3. Packaging -------------------

15.4. Mechanical Replacement Part List -

15.5. Electrical Replacement Parts List---