Sony TA-N77ES Service Manual

SERUICE
MANUAL
US
Canadian
.AEP
UK
E
Model
Model
Model
Model
Model
SPECIFICATIONS
POWER
OUTPUT
AND
TOTAL
HARMONIC
DISTORSION:
With
4
ohm
loads,
both
channels
driven,
from
20
-
20,000
Hz;
rated
270
watts
per
channel
minimum
RMS
Power,
with
no
rote
than
0.006%
total
harmonic
distortion
from
250
milliwatts
to
rated
output'
With
I
ohm
loads,
both
channels
driven,
from
20
-
20,000
Hz;
rated
200
watts
per
channel
minimum
RMS
Power,
with
no
more
than
0.004%
total
harmonic
distortion
from
250
milliwatts
to
rated
output'
0
dB
=
0.775V
STEREO
POTïER
AMPTITIER
Dynamic
power
10
Hz
-
100
kHz
8
ohms,
THD
0.02%
Total
harmonic
distortion
-
Continued
on
Page
2
-
Item
Condition
Deta
Continuous
RMS
power
oulPut
(both
channels
driven
simultaneouslY)
4 ohms
20Hz-
20kHz
THD
0.006%
270W
+
270W
6
ohms
20
Hz-20
kH.z
THD
0.005%
230W
+
230W
8 ohms
2O
Hz-20
kHz
THD
O.OO4%'
'2OO
W.+
2OO
W
SONY.

Sony TA-N77ES Specifications

General

Type	Stereo Power Amplifier
Signal to Noise Ratio	120 dB
Weight	27 kg
Frequency Response	5 Hz - 100 kHz
Damping Factor	100
Input Sensitivity	1V

Summary

Specifications and Identification

Audio and Other Specifications

Details on output power, harmonic distortion, and technical parameters.

Model Identification

Information regarding different model designations (US, Canadian, AEP, etc.).

Features and Safety

Product Features

Highlights key technologies like "Super legato linear system" and "G chassis".

Safety Check-out Procedures

Instructions for performing safety checks, including leakage tests.

System Connections

Preamplifier Connection

Explains how to connect a preamplifier using fixed and variable inputs.

Stereo and Monaural Amplifier Configurations

Illustrates setup for stereo and monaural power amplifier modes.

Function of Controls

Front Panel Controls Overview

Identifies and describes the purpose of each control on the front panel.

Disassembly Procedures

Top Plate and Front Panel Removal

Step-by-step guide for removing the top plate and front panel.

Main Board and Capacitor Removal

Procedures for opening the main board and removing capacitor assembly.

Protector Board Removal

Instructions for removing the protector board.

Circuit Boards Location

Diagram showing the placement of various circuit boards within the unit.

Electrical Adjustments

Offset and Bias Current Adjustments

Procedures for adjusting offset voltage and bias current.

Meter Adjustment

Steps to calibrate the power/watts meter for accuracy.

Diagrams and Schematics

Semiconductor Lead Layouts

Visual representation of component lead configurations for identification.

Mounting Diagrams

Illustrates component placement on various circuit boards.

Schematic Diagram

Detailed electrical circuit schematics for all unit boards.

Exploded Views - Mechanical Parts

Mechanical Parts Identification

Diagrams and lists for identifying mechanical parts of the unit.

Exploded Views - Internal Components

Internal Component Views

Exploded views of internal components like capacitors, base posts, and brackets.

Exploded Views - Switches and Boards

Switch and Board Identification

Views showing switches, PC boards, and their part numbers.

Exploded Views - Rear and Power

Rear Panel and Power Components

Exploded views of rear panels, power components, and fuses.

Electrical Parts List

Capacitors and Resistors

Detailed listing of capacitors and resistors with specifications.

Semiconductors and Connectors

Listing of diodes, transistors, ICs, and connectors with part numbers.

Coils, Meters, and Switches

Listing of coils, meters, switches, and various resistors.

Resistors and Relays

Comprehensive list of resistors, relays, and fuses with specifications.

Variable Resistors and Accessories

Listing of variable resistors, accessories, and packing materials.

Troubleshooting Guide

No Audio Issues

Guide for diagnosing and resolving "no audio" problems.

Monaural Sound Issue

Steps to troubleshoot monaural sound when stereo is expected.