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A-60
Pioneer A-60 Manuals
Manuals and User Guides for Pioneer A-60. We have
3
Pioneer A-60 manuals available for free PDF download: Service Manual
Pioneer A-60 Service Manual (89 pages)
Troubleshooting, Supplement to Tuning Fork
Brand:
Pioneer
| Category:
Amplifier
| Size: 21 MB
Table of Contents
Contents of Troubleshooting Power Amplifiers
3
Table of Contents
3
Operation of Circuits
5
Development of Power Amplifiers
5
B) All-Stage Direct-Coupled S E P P Amplifier
5
D) Non-Switching Amplifier (NSA)
5
E) Non-Switching Amplifier (with a DC-Servo Circuit)
12
Operation of N S a H
13
A) Operation of Class-A and Class-B Amplifiers 1
13
B) Switching Distortion
14
C) Biasing NSA
15
D) Circuit of NSA (A-7)
15
F) Operation of D C Servo Circuit • 1
19
G) Operation of
19
Circuits of Special Function 1
21
A) Differential Amplifier 1
21
B) Cascode Amplifier
22
C) Constant-Current Circuit
22
D) Bootstrap Circuit
24
E) Darlington and Complementary Connections
25
F) Current Mirror Circuit
26
G) Parallel Push-Pull Circuit
27
Troubleshooting Guide
30
How Do Troubles Occur
30
A) How Are Transistors Damaged
30
B) the Mechanism of Defects - H O W Are Amplifiers Damaged
33
Troubleshooting Knowhow
37
Troubleshooting Power Amplifier
43
A) Primary Fuse Blows out
45
B) Fuse Is All Right, but no Sound
48
C) Other Troubles
54
Distortion
54
Noise
57
Intermittent Sound When Sound Level Is Low
58
Click Noise When Powered O N / O F F
58
Amplifier Becomes Hot Even When the Sound Level Is Low
59
Contents of Dynamic Power Supply
62
Efficient Amplifier
63
Why Is a Powerful Amplifier Required
63
General Description
64
Calculating Dissipation
66
Circuit Principle
67
Differential Amplifier
67
A) When no Input Signal Is Applied
68
C) When Speakers Are Disconnected
70
E) When the Output Power Is 120W (80 Load)
72
H I G H - O N Circuit
73
Maintaining VH by H I G H - O N Circuit
75
Function of each Component in H I G H - O N Circuit
76
Troubleshooting
77
Cause and Effect
79
Va Stays at V L
79
Va Stays at V H All the Time
80
Differential Detector Is Inactive (Va Stays at VL)
81
By-Running Va Is Not High Enough
82
Trouble-Shooting Flowchart
83
Fet Buffer Circuit (A-90)
86
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Pioneer A-60 Service Manual (33 pages)
Pioneer A-60 Stereo Amplifier Service manual
Brand:
Pioneer
| Category:
Amplifier
| Size: 2 MB
Table of Contents
Contents
1
Safety Information
2
Safety Precautions
2
Product Safety Notice
2
Leakage Current Check
2
Specifications
3
Front Panel Facilities
4
Parts Location
6
Front Panel View
6
Front View with Panel Removed
6
Top View with Bonnet Removed
7
Rear Panel View
7
Exploded View
8
Block Diagram
10
Circuit Descriptions
13
Dynamic Power Supply Circuit
13
Operating Principles
13
A-60 Dynamic Power Supply Circuit
13
P.C. Boards Connection Diagram
14
Schematic Diagram
19
External Appearance of Transistors and IC's
22
Electrical Parts List
23
Miscellaneous Parts List
23
Packing
26
Adjustments
27
Idle Current Adjustment
27
For HE, HB and YP Types
30
AF Ass'y (GWK-231)
30
Line Voltage Selection
30
For S Type
32
Contrast of Miscellaneous Parts
32
Power Supply Circuit for S Type
32
Pioneer A-60 Service Manual (24 pages)
Brand:
Pioneer
| Category:
Amplifier
| Size: 7 MB
Table of Contents
Product Safety
2
Amplifier Section
3
Panel Facilities
4
Power Switch
4
Volume Control
5
Loudness Switch
5
Function Switches
5
Front View with Panel Removed
6
Rear Panel View
7
Block Diagram
9
Circuit Descriptions
10
P.C.boards
11
Schematic Diagram
13
Contrast of Miscellaneous Parts
21
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