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AA-R22/L
Akai AA-R22/L User Manual
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II.
DISMANTLING
OF
UNIT
In
case
of
trouble,
etc.
necessitating
dismantling,
please
dismantle
in
the
order
shown
in
the
photographs.
Reassemble
in
reverse
order.
1
SCREWS
2
3
4
5
a
a
i
OPEN
THE
PAIEI..
DO<R
b
DISCONNECT
SCREWS
FRONT
PANEL
SCREWS
--------------SERVICE
MANUAL
AA·R32/L,
AA·R42--------------
so
53
55
Table of Contents
Section 1 Circuit Operation Description
5
Table of Contents
5
Outline of Aa-R Series System
6
Acceptance of Input Selector Data
6
Fl Display
6
Selection of Input Signal
6
Volume Control
6
Tone Control
6
Long-Time Back-Up by Capacitor
6
Display Data
10
Digit Output of
11
Description of Input Selector
12
And Tone Control
14
The Status that will be Established When
21
Reset Status When Power Is on
21
How to Make Letters
22
At600 Terminals Description
26
Display Selection Blank Period
27
Frequency Display Segment Data
27
Block Diagram of Pll IC Tc9125P Interior and Description of the Function of each Terminal
28
Pll Data for Pll IC (Tc9125P) Control
29
Frequency Control by Pll
31
Akai ZERO DRIVE CIRCUIT (AA-R42/R32)
32
In the Beginning
32
Principle of Akai Zero Drive Circuit
32
Dual-Pole DC Servo (Aa-R42/R32/R22)
35
Section 2 Service Manual
37
Specifications
38
Dismantling of Unit
39
Ill. CONTROLS
40
Principal Parts Location
41
Am Step Selector
42
Conversion
42
Fm De-Emphasis Selector
42
Voltage Conversion
42
Adjustments
43
Clock Frequency Adjustment
43
Tuner Adjustment
43
Board Titles and Identification Numbers
46
Classification of Various P.C Boards
46
Service Manual
51
Model Aa-R32/L
52
Specifications
52
Model Aa-R42
53
Dismantling of Unit
54
Controls
56
Model Aa-R32/L
57
Principal Parts Location
57
Model Aa-R42
58
Am Step Selector
59
Conversion
59
Fm De-Emphasis Selector
59
Voltage Conversion
59
Adjustments
60
Clock Frequency Adjustment
60
Model Aa-R32/L, Aa-R42 Tuner Adjustment
61
Model Aa-R32/L P.C Board Titles .And
65
Model Aa-R42 P.C Board Titles and
66
Model Aa-R32/L Composition of Various P.C Boards
67
Model Aa-R42 Composition of Various P.C Board
72
Section 4 Parts List
77
Recommended Spare Parts
79
Tunerp.C Board Block
80
Control P.C Board Block
81
Eq P.C Board Block
81
Main Amp P.cboard Block
81
Assembly Block
83
Final Assembly Block
84
Recommended Spare Parts
85
Parts
86
Tuner Eq P.C Board Block
86
Control P.C Board Block
87
Main Amp.p.C Board Block
87
Power P,C Board Block
93
Assembly Block
95
Final Assembly Block
96
Index
97
4
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Akai AA-R22/L Specifications
General
Brand
Akai
Model
AA-R22/L
Category
Stereo Receiver
Language
English
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