Pioneer A-207R - Service Manual

ORDER NO.
RRV1912
T - IZK APR. 1998 Printed in Japan
PIONEER ELECTRONIC CORPORATION 4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153-8654, Japan
PIONEER ELECTRONICS SERVICE, INC. P.O. Box 1760, Long Beach, CA 90801-1760, U.S.A.
PIONEER ELECTRONIC (EUROPE) 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 1998
c
1. SAFETY INFORMATION ...................................... 2
2. EXPLODED VIEWS AND PARTS LIST ................ 3
3. SCHEMATIC DIAGRAM ....................................... 6
4. PCB CONNECTION DIAGRAM .......................... 14
5. PCB PARTS LIST ............................................... 22
6. ADJUSTMENT .................................................... 25
CONTENTS
7. GENERAL INFORMATION ................................ 26
7.1 IC ................................................................. 26
7.2 DISASSEMBLY ........................................... 27
7.3 BLOCK DIAGRAM....................................... 28
8. PANEL FACILITIES AND SPECIFICATIONS .... 29
A-307R
STEREO AMPLIFIER
A-207R
THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).
PH
A P A B
A P D ec Ene gy MOS
AP
M
P
M
U
PH
BA
+
–
B
+
–
V UM
M MAX
U
BA A PU
AP
M
Type
Model
Power Requirement
A-307R A-207R
MYXJ/EW AC220-230V ––––
MYXJ/GR AC220-230V ––––
MVXJ – AC220-230V ––––
SAMXJ – AC110V/120-127V/220V/240V With the voltage selector
SDXJ – AC110V/120-127V/220V/240V With the voltage selector
The voltage can be converted by the
following method.
The illustration shows the A-307R.

Pioneer A-207R Specifications

General

Input Sensitivity (Line)	150 mV
Weight	7.5 kg
Frequency Response	5Hz to 100kHz
Signal-to-Noise Ratio	100dB (Line)
Dimensions	420 x 132 x 320 mm
Input Sensitivity (Phono)	2.5 mV
Speaker load impedance	4-16 ohms
Total Harmonic Distortion (THD)	0.05% (20Hz-20kHz, 30W)

Summary

1. SAFETY INFORMATION

Safety Precautions and Leakage Current Check

Procedures for ensuring technician and customer safety, including leakage current testing.

Warnings and Model-Specific Notices

Information on lead warnings, replacement part safety, and specific model notices.

2. EXPLODED VIEWS AND PARTS LIST

Packing List and Model Contrast Table

3. SCHEMATIC DIAGRAM

3.1 Overall Connection Diagram

Illustrates the primary interconnections between major circuit boards and assemblies.

3.2 VOLUME AND HEADPHONE ASSEMBLIES

Volume and Headphone Circuit Schematics

Detailed schematic diagrams for the Volume and Headphone circuit boards.

3.4 AF ASSY

AF Circuit Schematic Diagram

Detailed schematic diagram for the Audio Frequency (AF) circuit assembly.

3.5 FRON L, FRONT R AND OPT ASSEMBLIES

Front L, Front R, and Optical Schematics

Schematic diagrams for the Front L, Front R, and Optical assemblies.

4. PCB CONNECTION DIAGRAM

4.1 VOLUME ASSY PCB Diagram

4.2 HEADPHONE AND AC PRIMARY ASSEMBLIES

Headphone and AC Primary PCB Diagrams

4.3 AF ASSY

AF Assembly PCB Diagram

4.4 FRONT L ASSY

Front L Assembly PCB Diagrams

4.5 FRONT R AND OPT ASSEMBLIES

Front R and Optical Assemblies PCB Diagrams

5. PCB PARTS LIST

PCB Assemblies and Key Component Lists

6. ADJUSTMENT

6.1 Idle Current Adjustment Procedure

Step-by-step guide for adjusting amplifier idle current with safety warnings.

7.2 DISASSEMBLY

Unit Disassembly Instructions

Provides illustrated steps for safely disassembling the equipment.

7.3 BLOCK DIAGRAM

System Block Diagram

Visual representation of the amplifier's functional blocks and signal paths.

8. PANEL FACILITIES AND SPECIFICATIONS

8.1 Rear Panel Facilities and Connectors

FRONT PANEL Controls and Indicators

Power, Volume, Input Selector, and Remote Sensor

Tape Monitor, Balance, Direct, Loudness, and Tone Controls

8.2 SPECIFICATIONS

Amplifier Section Specifications