Panasonic SB-VK31 - User Manual

n AMPLIFIER SECTION
PMPO 2500 W
RMS power output
THD 10% both channels driven
1 kHz (Low channel) 75 W per channel (6 Ω)
10kHz (High channel) 75 W per channel (6 Ω)
Total Bi-Amp power 150 W per channel
A
UX
Input sensitivity 250 mV
Input Impedance 13.3 kΩ
Phone jack
Terminal Stereo, 3.5 mm jack
MIC jack
Sensitivity 0.7 mV, 680 Ω
Terminal Mono, 3.5 mm jack (2 system)
n FM TUNER SECTION
Frequency range 87.50 - 108.00 MHz (50 kHz steps)
Sensitivity 2.5µV (IHF)
S/N 26 dB 2.2 µV
A
ntenna terminal(s) 75 Ω (unbalanced)
n AM TUNER SECTION
Frequency range 522 - 1629 kHz (9 kHz steps)
520 - 1630 kHz (10 kHz steps)
Sensitivity
© 2004 Panasonic AVC Networks Singapore Pte.
Ltd. (RCB registration number: 197701580H) All
rights reserved. Unauthorized copying and
distribution is a violation of law.
SA-VK31GC
SA-VK31GS
Colour
(S)... Silver Type
S/N 20 dB (at 999 kHz) 560 µV/m
n CASSETTE DECK SECTION
Track system 4 track, 2 channel
Heads
Record/playback Solid permalloy head
Erasure Double gap ferrite head
Motor DC servo motor
Recording system AC bias 100 kHz
Erasing system AC erase 100 kHz
Tape speed 4.8 cm/s
Overall frequency response (+3 dB, -6 dB at DECK OUT)
NORMAL (TYPE I) 35 Hz - 14 kHz
S/N 50 dB (A weighted)
Wow and flutter 0.18 % (WRMS)
Fast forward and rewind time Approx. 120 seconds with
C-60 cassette tape
n CD SECTION
Discs played [8 cm or 12 cm]
(1) CD- Audio (CD-DA)
(2) Video CD
(3) CD-R/RW (CD-DA, MP3 disc)
(4) MP3
Sampling frequency 44.1 kHz
Decoding 16 bit linear
CD Stereo System
Specifications
ORDER NO. MD0405174C3

Summary

Specifications

Amplifier Section

FM Tuner Section

AM Tuner Section

Cassette Deck Section

CD Section

Safety Precautions

General Safety Precautions

Essential safety guidelines for handling the product.

Before Use Precautions

Instructions and warnings before operating the unit for the first time.

Repair and Adjustment Precautions

Safety measures and procedures before performing repairs or adjustments.

Protection Circuitry

Information on the unit's protection circuits and how they function.

Handling Precautions

Electro Static Discharge (ESD) Prevention

Techniques to prevent damage to sensitive electronic components from static electricity.

Handling Lead Solder

Information and cautions regarding the use of lead-free solder.

Traverse Deck Precautions

Grounding for Electrostatic Breakdown Prevention

Methods for grounding to prevent electrostatic discharge during servicing.

Laser Diode Precautions

Caution Labels

Operation Procedures

Front Panel Controls

Remote Control Functions

Schematic Diagrams

CD Servo Circuit

Schematic of the CD servo control system, including optical pickup and driver ICs.

Tuner;Main Circuit

Circuit diagram for the tuner pack and main audio processing sections.

Main Circuit

Circuit diagram for the main control and power supply interface circuits.

Panel Circuit & Tact Switch Circuit

Deck Circuit & Deck Mechanism Circuit

Power Circuit

Schematic detailing the power supply regulation and distribution for the entire unit.

Transformer, Voltage Selector, CD Detect, Spindle Position, CD Loading Circuits

Wiring Connection Diagram

PCB Interconnections

Visual representation of wiring between main PCBs and external modules.

Troubleshooting Guide

Troubleshooting Flowchart

Step-by-step guide to identify and fix system problems based on symptoms.

Parts Location and Replacement Parts List

Deck Mechanism Parts Location

Deck Mechanism Parts List

CD Loading Mechanism Parts Location

CD Loading Mechanism Parts List

Electrical Parts List

Panasonic SB-VK31 Specifications

General

Tuner Bands	FM/AM
Type	Mini Hi-Fi System
Playable Media	CD, CD-R, CD-RW, MP3
Inputs	AUX
Outputs	Headphone