Pioneer A-405R Service Manual

C,!)
RIOIMEER*
The Art
of Entertainment
Service
Manual
B’
in
»h(w»
model A-605R.
ORDER
NO.
RRV1
594
STEREO AMPLIFIER
A-605R
A-605R-G
A-505R
A-405R
A-405R-G
THIS
MANUAL
IS
APPLICABLE
TO
THE
FOLLOWING
MODEL(S)
AND TYPE(S).
Type
Model
Power
Requirement
The voltage can
be
converted
by the
following
method.
A-605R A-605R-G A-505R
A-405R A-405R-G
HY/EW
0 0 0 0 O
AC220
-
230V
HY/GR 0
-
0 0
-
AC220
-
230V
SD 0
- - -
AC110V/120
-
127V/220V/240V With the voltage
selector
HV
0
-
-
0
-
AC230V
CONTENTS
1 . EXPLODED VIEWS
AND PARTS LIST
2
2. PACKING AND
PARTS
LIST
5
3.
SCHEMATIC
AND
PCB
CONNECTION
DIAGRAMS
....
6
4. PCB PARTS LIST
21
5. ADJUSTMENTS
24
6.
IC
INFORMATION
25
7.
BLOCK
DIAGRAM
26
8.
FORA-605R/HY/GR,SD, HV,
A-605R-G/HY/EW,
A-505R/HY/EW.
HY/GR, A-405R/HY/EW,
HY/GR,
HV
AND A-405R-G/HY/EW
TYPES
27
9. PANEL FACIRITIES
32
10.
SPECIFICATIONS
35
PIONEER
ELECTRONIC CORPORATION
4
Meguro
i
-Chome,
Meguro-ku, Tokyo
153,
Japan
PIONEER
ELECTRONICS SERVICE,
INC.
P.O.Box
1760,
Long
Beach, CA
90801-1760,
U.S.A.
PIONEER ELECTRONIC lEUROPEl
N.V. Haven
1087,
Keetberglaan
1.
9120
Melsele,
Belgium
PIONEER
ELECTRONICS
ASIACENTRE PTE. LTD.
501 Orchard
Road,
#10-00
Lane
Crawford
Place, Singapore
0923
©
PIONEER ELECTRONIC CORPORATION 1996
T-FFK
APR.
1996
Printed
in
Japan

Pioneer A-405R Specifications

General

Power Output	55 W (8 Ohms, 20 Hz - 20 kHz, 0.07%)
Frequency Response	5 Hz to 100 kHz
Signal-to-Noise Ratio	86dB (MM), 107dB (line)
Input sensitivity	2.5mV (MM), 200mV (line)
Dimensions	420 x 344 x 125 mm
Weight	6.7 kg
Total harmonic distortion	0.07%
Speaker load impedance	4 ohms to 16 ohms
Input Impedance	47k ohms
Total Harmonic Distortion (THD)	0.07% (20 Hz to 20 kHz, 8 ohms)

Summary

1. Exploded Views and Parts List

Parts List for A-605R/HY/EW

3. Schematic and PCB Connection Diagrams

3.1 Overall Wiring Diagram

Diagram illustrating the overall wiring connections of the unit.

3.2 AF Assembly Schematic

Schematic diagram for the Audio Frequency (AF) assembly.

3.3 Front L and Volume Assemblies Schematic

Schematic diagrams for the Front Left and Volume assemblies.

3.4 Front R, Headphone, AC Primary Assemblies Schematic

4. PCB Parts List

5. Adjustments

Idle Current Adjustment

Procedure for adjusting the idle current of the amplifier.

7. Block Diagram

8. Model Variations and Part Differences

8.1 A-605R Series Model Part Differences

9. Front Panel Controls

Front Panel Control Descriptions

10. Technical Specifications

Amplifier Section