Sansui AU-G55X Service Manual

AU G55X
G33X
SERVICE
MANUAL
INTEGRATED
AMPLIFIER
SAHStl
AU-655X
B33X
CAUTION
1 . Parts
identified
by
theAsymbol
on
the schematic
diagram
and the parts list are
critical
for
safety.
Use
only
replacement parts that
have
critical charac-
teristics
recommended
by
the
manufacturer.
2. Make
leakage-current
or
resistance
measurements
to
determine
that
exposed parts
are
acceptably
in-
sulated
from
the supply
circuit
before
returning
the
appliance
to
the
customer.
4
ScltvstlL.
•SPECIFICATIONS
Power
output <AU-G55X>
Min. RMS,
both channels
driven,
from
20
to 20,000
Hz,
with
no
more than
0.004%
total
harmonic
distortion.
65
watts
per channel
into
8
ohms.
Power output <AU-G33X>
Min.
RMS,
both
channels
driven, from
20
to 20,000
Hz,
with
no more than 0.004%
total harmonic
distortion.
45
watts per channel
into
8
ohms.
Load
impedance 8
ohms
Total harmonic distortion
less
than
0.004%
at
or
below rated min. RMS
power
output
Intermodulation distortion
(60
Hz: 7
kHz
-4:1 SMPTE
method)
less
than
0.004%
at rated
power output
Frequency response (at
1 watt)
Overall (from AUX,
CD,
TUNER,
TAPE PLAY-1,
2)
.... DC
to 180,000 Hz,
+0
dB
-3.0
dB
RIAA curve
deviation
(PHONO-MM,
20
Hz to 20
kHz)
+0.2
dB,
-0.2
dB
Input sensitivity and impedance
(at
1
kHz)
PHONO (MC)
250
jiV/100 ohms
(Max.
input capability: 15
mV
at
1
kHz,
less
than
0.008% total
harmonic
distortion)
PHONO
(MM)
2.5
mV/47 kohms
(Max. input capability; 150
mV
at 1
kHz, less than
0.005%
total harmonic distortion)
CD,
AUX
150
mV/47
kohms
TUNER, TAPE
PLAY-1,
2
... 150
mV/47
kohms
Signal
to
noise ratio (short-circuit,
A-network)
PHONO
(MC)
67
dB
PHONO
(MM)
85 dB
CD,
AUX
105 dB
TUNER, TAPE PLAY-1,
2
105
dB
Controls and
Filter
BASS
+10 dB,
—
8dB
at
50 Hz
TREBLE
±7
dB at
10kHz
LOUDNESS
+9 dB at
50
Hz
+ 5 dB at
10kHz
(VOLUME: -30
dB
position)
FILTERS
LOW
-3
dB at
20
Hz
(6
dB/oct)
HIGH
-3
dB
at
10kHz
(6
dB/oct)
Power
requirements
<AU-G55X>
Power
voltage
120/220/240V
(50/60
Hz)
For
U.S.A.
&
Canada
120V
(60
Hz)
Power
consumption....
290
watts
351
V/K
Rated
440
watts
Maximum
Power
requirements <AU-G33X>
Power
voltage 1
20/220/2
40V
(50/60
Hz)
For U.S.A.
&
Canada
120V
(60
Hz)
Power consumption....
260
watts
321
V/A
Rated
400
watts
Maxinnum
Dimensions
430 mm
(16-15/1
6*)
W
111 mm
(4-3lr>
H
329
mm
(13
4
|
[>
Weight
<AU-G55X>
8.4 kg
(18.5
lbs)
net
9.5 kg
(20.9
bs)
packed
Weight
< AU-G33X
>
8.1
kg
(17.9
bs)
net
9.2 kg
(20.3
bs)
packed
*
Design and
specifications
subject to changes
vtthoeJ*
notice
for
im-
provements.
*
Due
to local laws and regulations, this
unit
soki
i
$^me
areas
are
not
equipped with
variable voltage seledtors.
SANSUI ELECTRIC
CO.,
LTD

Sansui AU-G55X Specifications

General

Brand	Sansui
Model	AU-G55X
Category	Amplifier
Language	English

Summary

Specifications

Power Output

Details the minimum RMS power output for both amplifier models.

Distortion Characteristics

Specifies the total harmonic and intermodulation distortion levels.

Frequency Response and RIAA Deviation

Lists frequency response range and RIAA curve deviation for phono inputs.

Input Sensitivity and Impedance

Provides input sensitivity and impedance for various audio sources.

Signal-to-Noise Ratio

Details the signal-to-noise ratio for different input types.

Controls and Filters

Lists characteristics of controls like Bass, Treble, Loudness, and Filters.

Power Requirements

Outlines power voltage and consumption for AU-G55X and AU-G33X models.

Dimensions and Weight

Specifies the physical dimensions and net/packed weight of the units.

Safety Precautions

Critical Safety Parts Identification

Emphasizes using manufacturer-recommended parts for safety-critical components.

Leakage Current and Insulation Testing

Mandates checking for acceptable insulation and leakage current before customer return.

Manual Interpretation Guide

Product Markings and Symbols

Explains the meaning of various international symbols (UL, CSA, etc.) used in the manual.

Printed Circuit Board Notes

Provides information on separating and ordering parts for printed circuit boards.

Parts List Referencing

Advises on referring to common parts lists for omitted capacitors and resistors.

Abbreviations Glossary

Defines common abbreviations used throughout the service manual for components and terms.

Block Diagram

Adjustment Procedures

Driver Circuit Adjustment

Details the procedure for adjusting DC offset and bias current in the driver circuit.

Peak Power Indicator Balance Adjustment

Explains how to adjust the peak power indicator level for balance between channels.

Parts Location and Lists

F-4691 Control & Power Amp Board

Shows component layout and parts list for the F-4691 Control and Power Amplifier circuit board.

F-4702 Differential Amp Board

Shows component layout and parts list for the F-4702 Differential Amplifier circuit board.

Parts Location and Lists

F-4692 Protector Circuit Board

Shows component layout and parts list for the F-4692 Protector circuit board.

Parts Location and Lists

F-4703 Driver Amp & Power Supply Board

Shows component layout and parts list for the F-4703 Driver Amp and Power Supply circuit board.

Parts Location and Lists

F-4700 EQ Amp Circuit Board

Shows component layout and parts list for the F-4700 Equalizer Amplifier circuit board.

F-4705 FL Indicator Circuit Board

Shows component layout and parts list for the F-4705 Front Lamp Indicator circuit board.

F-4704 Power Switch Board

Shows component layout and parts list for the F-4704 Power Switch circuit board.

Parts Location and Lists

F-4687 Phono/Rec SW. & Input Terminal Board

Shows layout and parts for Phono/Rec SW. & Input Terminal circuit board.

F-4688 Input Selector & Volume Board

Shows layout and parts for Input Selector & Volume circuit board.

F-4689 Loudness & Balance VR Board

Shows layout and parts for Low/High Loudness SW. & Balance VR circuit board.

Parts Location and Lists

F-4690 Input Terminal Board

Shows component layout and parts list for the F-4690 Input Terminal circuit board.

F-4693 Speakers Terminal Board

Shows component layout and parts list for the F-4693 Speakers Terminal circuit board.

F-4694 Indicator Board

Shows component layout and parts list for the F-4694 Indicator circuit board.

F-4695 Phono SW. Board

Shows component layout and parts list for the F-4695 Phono Switch circuit board.

F-4696 MM/MC Indicator Board

Shows component layout and parts list for the F-4696 MM/MC Indicator board.

F-4697 Protector Indicator Board

Shows component layout and parts list for the F-4697 Protector Indicator board.

F-4698 Rotary Flex Board (REC Selector)

Shows component layout and parts list for the F-4698 Rotary Flex Board (REC Selector).

Other Parts and Front View

F-4701 Control Board

Shows component layout and parts list for the F-4701 Control circuit board.

F-4699 Pilot Lamp Board

Shows component layout and parts list for the F-4699 Pilot Lamp circuit board.

Front View Component Identification

Identifies and lists external controls, knobs, and indicators visible on the front panel.

Other Parts

Top View Component Identification

Identifies and lists internal components and their locations as seen from the top view.

Integrated Circuit Block Diagrams

M5220L Audio Pre Amp. IC

Interior block diagram for the M5220L Audio Pre Amplifier integrated circuit.

TA7317P Speaker Protector IC

Interior block diagram for the TA7317P Speaker Protector integrated circuit.

HA12010 FL Display Tube Drive IC

Interior block diagram for the HA12010 FL Display Tube Drive integrated circuit.

TA7318P Meter Drive IC

Interior block diagram for the TA7318P Meter Drive integrated circuit.

M5220P OP Amp. IC

Interior block diagram for the M5220P Operational Amplifier integrated circuit.

Packing List

Itemized Packing Contents

Lists the items included in the product packaging, such as vinyl bags and carton cases.

Accessory List

Included Accessories

Lists the accessories provided with the unit, like operating instructions.