Aiwa XA-950 Service Manual

S/M Code No.0076 DATE OF ISSUE 7/1992 -—!
XA-950
aiica
SERVICE
MANUAL
STEREO INTEGRATED AMPLIFIER
SPECIFICATIONS
General input jacks
Power
requirements
(Sensitivity/input
impedance)
XA-950E,
Z
PHONO
:
MM
230V
AC,
50
Hz
2.5
mV/47k
ohms
XA-950K
:
ern
TUNER
eo
VEC
AI
oo
Power
consumption
:
;
es
WwW
TAPE
1,
TAPE
2/DAT,
Power amplifier
ADAPTOR: 150 mV/47k ohms
PHONO overioad level
130 mV (MM)
Effective output power (1 kHz, T.H.D 0.01%)
150 W+150 W Output jacks
(4 ohms, T.H.D. 0.9%, (Level/output impedance)
1 kHz) TAPE 1, TAPE 2/DAT,
100 W+100 W ADAPTOR: 150 mV/47k ohms
(8 ohms, T.H.D. 0.9%, Headphones: 8-32 ohms
1 kHz) Speakers: 4-16 ohms
Total harmonic distortion (A+B: 8-16 ohms)
0.005% RIAA deviation +0.5 dB (30 Hz—15 kHz)
(20 Hz-20 kHz, 75 W, SUBSONIC filter
8 ohms) 16 Hz 12 dB/Oct
Output bandwidth
§ Hz—70 kHz Maximum dimensions
(less than 0.05%) (wihid) 430 x 140 x 340 mm
(Both channels driven, (17 x 55/s x 13/2 inches)
8 ohms) Weight 10.5 kg (23.1 Ibs)
Frequency response
5 Hz~-150 kHz ( *° dB)
Preamplifier
S/N ratio IHF A curve short circuited
PHONO : MM 95 dB
(5 mV input}
- MC 75 dB @ Design and specifications are subject to change without notice.
(0.5 mV input) @ The word “BBE” and the “BBE symbol” are trademarks of BBE
TUNER, CD, VIDEO/AUX,
TAPE 1, TAPE 2/DAT,
ADAPTOR: 110 dB
Sound, Inc.
@ Under license from BBE Sound, !nc.
AIWA CO.,LTD. Tokyo Japan
Printed in Japan
Aooe

Aiwa XA-950 Specifications

General

Input Sensitivity	2.5mV (MM), 150mV (line)
Channel Separation	60dB (1kHz)
Output	150mV (line)
Speaker Load Impedance	4Ω to 16Ω
Phono Input	MM/MC

Summary

Specifications

General, Power Amplifier, and Preamplifier Specs

Details power requirements, consumption, and amplifier/preamplifier specs like output power, distortion, bandwidth, and S/N ratio.

Input/Output, Filters, and Dimensions

Covers input/output jacks, RIAA deviation, subsonic filter, physical dimensions, and weight of the unit.

Electrical Main Parts List

Component Breakdown

Lists all major electronic components categorized by type: ICs, transistors, diodes, capacitors, resistors, fuses, jacks, coils, and relays.

Integrated Circuit Information

IC Block Diagram and Pin Details

Visualizes IC functions and provides pin-specific information for key integrated circuits.

Adjustment Procedures

Idling Current Adjustment

Step-by-step guide for setting idling current using test points and potentiometers for optimal performance.

Schematic Diagrams

Circuit Schematics for all Boards

Comprehensive schematics for all circuit boards including EQ, Volume, Front, Power Supply, and others.

Printed Circuit Board Layouts

Layouts for Main and Supporting Boards

Diagrams showing the physical layout of the main circuit board (A MAIN C.B) and other associated circuit boards.

Sub-Assembly Diagrams

Board Interconnections and Views

Illustrates how different circuit boards connect to the main unit and provides views of sub-assemblies.

System Block Diagram

Functional Unit Overview

High-level diagram showing functional blocks and signal flow of the amplifier system.

Exploded View - Mechanical Assembly

Component Identification in Assembly

Diagram identifying major mechanical parts and their assembly within the unit.

Exploded View - Sub-Assemblies

Sub-Assembly Component Identification

Diagram identifying components within sub-assemblies and their mounting points.

Accessories and Package List

Included Accessories

Lists the instruction booklet and remote controls provided with the product.