Panasonic SA-AK220E Service Manual

n AMPLIFIER SECTION
RMS Power output
THD 10%, both channels driven
1 kHz 80 W per channnel (6Ω)
Total RMS power 160 W per channel
Input sensitivity
A
UX 250 mV
Input Impedance
A
UX 13.3 kΩ
n FM TUNER SECTION
Frequency range
87.5 - 108.0 MHz (50 kHz steps)
Sensitivity 1.8µV (IHF)
S/N 26 dB 1.5 µV
A
ntenna terminal(s) 75 Ω (unbalanced)
n AM TUNER SECTION
Frequency range 522 - 1629 kHz (9 kHz steps)
Sensitivity
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
© 2004 Panasonic AVC Networks Singapore Pte.
Ltd. All rights reserved. Unauthorized copying and
distribution is a violation of law.
SA-AK220E
SA-AK220EB
Colour
(S)... Silver Type
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
Sampling frequency 44.1 kHz
Decoding 16 bit linear
Pickup
Beam source/wavelength Semiconductor laser/780 nm
Number of channels Stereo
Frequency response 20 Hz - 20 kHz (+1, -2 dB)
Wow and flutter Below measurable limit
Digital filter 8fs
D/A converter MASH (1 bit DAC)
MP3
Bit rate 32 kbps - 320 kbps
Sampling frequency 32 kHz, 44.1 kHz, 48 kHz
n GENERAL
Power Supply (For E only) AC 230V, 50Hz
Power Supply (For EB only) AC 230 - 240 V, 50Hz
Power consumption 174 W
Power Consumption in standby
mode
0.5 W
Dimensions (W x H x D) 250 x 330 x 363 mm
CD Stereo System
Specifications
ORDER NO. MD0403070C2

Panasonic SA-AK220E Specifications

General

Number of speakers	2
Total Harmonic Distortion	10 %
CD Player	Yes
Disc capacity	1
Radio	Yes
USB Port	No
Bluetooth	No
Remote Control	Yes
Cassette deck	Yes
Type	Mini System
Speaker Configuration	2.0
Impedance	6 Ohm
Playback media	CD-R, CD-RW
Tuner bands	FM

Summary

Specifications

Amplifier Section Specifications

Specifications for the amplifier section.

Cassette Deck Section Specifications

Performance metrics for the cassette deck.

CD Section Specifications

Technical data for the CD player.

Safety Precautions

Caution for AC Mains Lead

Crucial safety information about the AC mains lead.

Repair Preparations and Precautions

Before Repair and Adjustment

Important steps before starting repair work.

Electrostatic Discharge (ESD) Prevention

Measures to prevent ESD damage to components.

Component Handling Precautions

Laser Diode Precaution

Safety warnings and handling advice for the laser diode.

Operation Procedures

Main Unit Operation Procedures

Guide to operating the unit using its front panel controls.

Disassembly and Assembly Procedures

Main Component Disassembly Flow Chart

Overview of the disassembly process.

Top Cabinet and Rear Panel Disassembly

Steps to remove the top cabinet and rear panel.

CD Mechanism Unit Disassembly

Steps to remove the CD mechanism unit.

PCB Unit Disassembly

Instructions for disassembling main, transformer, and power PCBs.

Deck Mechanism and Deck PCB Disassembly

Steps to remove the deck mechanism and its PCB.

CD Mechanism Component Replacement

Guides for replacing key CD mechanism parts.

Pinch Roller and Head Block Replacement

Steps to replace the pinch roller and head block.

Tape Trouble Counter-measures

Solutions for common tape playback issues.

Service Position and Checks

Checking Main, Power, and Transformer PCBs

Specific steps for inspecting key PCBs.

Error Code Descriptions

Deck Mechanism Error Codes

Table of error codes for the deck mechanism.

CD/Changer Block Error Codes

Table of error codes for the CD/changer.

Self-Diagnostic Functionality

Entering the Self-Diagnostic Function

Steps to activate the diagnostic mode.

Cassette Mechanism Test Procedure

Test procedure for the cassette mechanism.

Power Amplifier Failure Diagnosis

Specific troubleshooting for power amplifier failures (F61).

CD Test Mode Functionality

Setting the CD Test Mode

Procedure to set up the CD unit for testing.

Measurements and Adjustments

Cassette Deck Section Measurements

Measurements and adjustments for the cassette deck.

Tuner Section Measurements

Measurements and adjustments for the tuner section.

System Diagrams Overview

Block Diagram

High-level block diagram of the system.

Detailed Circuit Diagrams - CD Section

CD Servo Circuit Schematic

Detailed schematic of the CD servo system.

Deck Circuit Schematics

Deck Circuit Schematic

Schematic for deck audio and control circuits.

Printed Circuit Board Layouts

CD Servo PCB Layout

Component layout for the CD servo PCB.

Main PCB Layout

Component layout for the main PCB.

Panel PCB Layout

Component layout for the panel PCB.

Tact Switch PCB Layout

Component layout for the tact switch PCB.

Transformer PCB Layout

Component layout for the transformer PCB.

CD Mechanism PCB Layouts

Component layout for the CD loading PCB.

Power PCB Layout

Component layout for the power PCB.

Deck PCB Layout

Component layout for the deck PCB.

Deck Mechanism PCB Layout

Component layout for the deck mechanism PCB.

Wiring Connection Diagram

Overall Unit Wiring Connections

Diagram showing interconnections between major units.

IC Terminal Functions

IC701 Terminal Functions

Pinout and functions for IC701 (Servo Amplifier).

IC305 Terminal Functions

Pinout and functions for IC305 (Microprocessor).

Troubleshooting Guide

Troubleshooting Flowchart

Step-by-step guide for diagnosing problems.

Parts Location and Replacement Parts List

Important Safety Notice for Parts

Critical safety information for replacing components.

Electrical Parts List

Comprehensive list of electrical components.