Page 1
Type Voltage Remarks
KCU 120V only CSA {Canada} and UL {U.S.A) approved with de'emphasis selector switch (25psl75ps)
HG 22OV and 24OV (Switchable) SEMKO {Sweden), NEMKO (Norwav),
DEMKO (Denmark) and El (Finland) approv-‚¬d
s 1IOV, 12OV,22OV and 240V {Switchable) General export model with de-emphasis selector
switch {25pslsops/75psl
MODEL SX.125O COMES IN THREE VERSIONS DISTINGUISHED AS FOLLOWS:
When repairing S or HG type, please see the manual on page 101.
CONTENTS
SPECIFICATIONS
FRONT PANEL FACILITIES
CONNECTION DIAGRAM
CIFCUIT DESCRIPTIONS
4,1 Tuner Section
4.2 Audio Section
5.
6.
7.
8.
4.3 Protection Circuit . .......,. 17
4.4 Power Supply Circuit ....... 18
LEVEL DIAGRAM .,.. .... .. ... 19
BLOCK DfAGRAM . .. . . ....... 20
DlsAssEMBLY. ........22
PARTS LOCATION
8.1 Front Panel View . . ........ 25
4.2 Rear Panel View .........,27
8.3 Top View ........29
8.4 Bottom View ....., 31
8.5 Front View .......33
ADJUSTMENTS
9.1 AM Tuner . .. . 3b
9.2 FM Tuner ...........36
9.3 Power Amplifier ...........38
9.4 Stabilizer ... .. . .... 38
DIALCORDSTRINGING ........ 39
EXPLODED VIEWS . ... . 40
SCHEMATIC DIAGRAMS, P.C. BOARD PATTERNS AND
PARTS LISTS
1.
2.
3.
4.
4
6
I
11
14
9.
I
i
I
10.
11.
12.
51 12.1 Miscellaneous-parts
II
Page 2
'--
\o 12.2
12.3
12.4
12.5
12.6
12.7
12.8
12.9
12.10
12.11
12.12
12.13
12.14
12.15
12.16
12.17
12.18
sx-1 25C,
Schematic Diagram
Internal Circuitry of Integrated Circuits
The Circuit of FM Front End (AWB-023)
Tuner Assembly (AWE-0681
De+mphasis Switch Assembty (AWX-099)
Equalizer Amplifier Assembly (AWF-021 )
Function Switch Assembly (AWS-094)
Flat Amplifier Assembly (AWG-042)
5P Connector Assembly (AWX-062)
Control Amplif ier Assembly (AWG-0411
Filter Amplif ier Assembly (AWM-089)
Microphone Jack Assembly (AWX-@71
Pourer Amplif ier Assembly (AWH-048)
Speakers Switch Assembly (AWS-G}S)
Protection Circuit Assembly (AWM-091)
Stabilizer Assembly (AWR-l 06)
Power Supply Assembly (AWR-I07)
PACKING
PARTS LIST OF EXPLODED VIEWS .
SUPPLEMENTS FOR SX-l250/HG AND SX-1250/5
15.1 Contrast of Miscellaneous-parts .. ........101
15.2 Schematic Diagram for SX-1250/S .....lO3
15.3 Schematic Diagram forSX-l2sOlHG. ..... lOb
15.4 De-emphasis Switch Assembly (AWX-101, for S type) .. .....1O7
15.5 Speakers Switch Assembly (AWS.098, for HG type) ........ 108
15.6 Poriver Supply Assembly (AWR-108, for HG type) .........110
s3
55
56
57
63
64
68
70
75
76
80
83
84
88
90
93
96
98
99
13.
14.
15.
I
a !
