Panasonic sa vkx25xx

Page 1

PSG14090020E

Service Manual

Remote SB-AKX18

SA-VKX25
Control 5

SB-AKX18

DVD Stereo System
Model No. SA-VKX25EE

SA-VKX25GA
SA-VKX25GS

Product Color: (K)...Black Type

Please refer to the original service manual for:

0 DVD Mechanism Unit (BRS12D), Order No. PSG1408009AE
0 Speaker system SB-AKX18PN-K, Order No. PSG14010086E

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. It is essential that these critical parts should be replaced
with manufacturers specified parts 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 GS only) -
1.5. Power Supply using SMPS
1.6. Safety Parts Information

2 Warning -----------------------------
2.1. Prevention of Electrostatic Discharge (ESD)

to Electrostatically Sensitive (ES) Devices ---------- 7
2.2. Precaution of Laser Diode ------------------------------- 7
2.3. General description about Lead Free Solder

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

prevention

3 Service Navigation

Panasonic

breakdown

PAGE

3.1. Service Information -------------------------------------- 10

4 Specifications ------------------------------------
5 Location of Controls and Components--
5.1. Remote Control Key Button Operation
5.2. Main Unit Key Button Operation

6 Service Mode-
6.1. Service Mode Table -
6.2. Sales Demonstration Lock Function
6.3. Doctor Mode Table-
6.4. Error Code Table
6.5. Self-Diagnostic Mode -------------------
6.6. Self Diagnostic Function-Error Code
6.7. Firmware Version-Up Information»

7 Troubleshooting Guide ---------
7.1. No Power or No Display--
7.2. Bluetooth® Pairing Failure--
7.3. No Key Function ---------------

© Panasonic Corporation 2014. All rights reserved.
Unauthorized copying and distribution is a violation
of law.

Page 2

7.4. No Remote Control Function-
7.5. USB Device Cannot Detect---
7.6. No Output Sound--
7.7. Check Point ---------

8 Disassembly and Assembly Instructions-
8.1. Type of Screws -----------------------------
8.2. Disassembly Flow Chan ---------------------
8.3. Main Components and P.C.B. Locations
8.4. Disassembly of Top Cabinet ----------
8.5. Disassembly of Front Panel Unit
8.6. Disassembly of Panel P.C.B. and Music Port

P.C.B. ----------------------------

8.7. Disassembly of USB P.C.B.

8.8. Disassembly ot Rear Panel

8.9. Disassembly of Main P.C.B.

8.10. Disassembly of SMPS Module --------------

8.11. Disassembly of DVD Mechanism Unit
8.12. Disassembly of Backend P.C.B. Ass'y

9 Service Position -----------------------------------
9.1. Checking of Panel P.C.B. and Music Port

15.4. Mechanical Replacement Part List-
15.5. Electrical Replacement Parts List --

P.C.B. ------------------------------------------------------ 42
9.2. Checking and Repairing of Main P.C.B. and
SMPS Module --------------------------------------------- 42
9.3. Checking and Repairing of Backend P.C.B.
Ass'y -------

10 Block Diagram -
10.1. Backend ----------
10.2. System Control -
10.3. Audio -----------
10.4. Power Supply

11 Wiring Connection Diagram»

12 Schematic Diagram --------------
12.1. Schematic Diagram Notes-
12.2. Backend (DV5U) Circuit (1/4)--
12.3. Backend (DV5U) Circuit (2/4) --
12.4. Backend DV5U) Circuit (3/4) --
12.5. Backend DV5U) Circuit (4/4)--
12.6. Backend Motor Driver) Circuit
12.7. Backend Video) Circuit -
12.8. Main (UP) Circuit
12.9. Main SOC) Circuit

12.10. Main USB) Circuit
12.11. Main Tuner AUX) Circuit
12.12. Main DSP) Circuit -----------
12.13. Main DAMP) Circuit ---------------
12.14. Main Voltage Regulator) Circuit -
12.15. Main Connector) Circuit
12.16. Main Bluetooth) Circuit -----
12.17. Panel Circuit ----------------
12.18. USB & Music Port Circuit

13 Printed Circuit Board
13.1. Backend P.C.B. Ass'y -
13.2. Main P.C.B. Ass'y (Side A)-
13.3. Main P.C.B. Ass'y (Side B)----
13.4. Panel. USB & Music Port 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 -------------------