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18-transistor, 6-band
Portable Radio
move. 18H-815
SERVICE
MANUAL
'SANYO ELECTRIC CO., LTD.
INTERNATIONAL
DIVISION:
SANYO
ELECTRIC
TRADING
CO.,
LTD.
OSAKA,
JAPAN
(14) 2SB186A
Audio Amplifier
ALIGNMENT
PROCEDURES
AM ALIGNMENT
Thru. Loop Antenna
Cd
LF.T.
T15
1600KC}
455KC
LF.T.
T14
MW
1600KC}
455KC
i.F.T.
T13
MW
1600KC;
455KC
Oscillator
MW
MW
600KC
Antenna
MW
MW
600KC
Oscillator
SW1
SW
1
2.5MC
Antenna
SWI
SW 1
2.5MC
Oscillator SW2
SW 2
9.0MC
Antenna
SW2
SW 2
9.0MC
Oscillator 49m
49m
6.0MC
Antenna
49m
49m
6.0MC
FM IF ALIGNMENT
SPECIFICATIONS
Frequency Range---+-++-++
FM
87
-
108
MC
(16) 2SB405R
Power Amplifier
SW1
23
-
73
MC
(17) 2SD72R
Power Amplifier
SW2
8.0
-
22.0
MC
7
(18) 2SC537Z
Voltage Stabilizer
49m
595 -
7.3
MC
Diodes «s+-++++eee- (1) 18553
A.F.C.
MW
520
- 1605
KC
- €2) 18188
FM Limiter
a
LW
150
-
350
KC
(3) 18188
FM A.G.C.
' oes
Frequency::+-+-sree-see- FM
10.7
MC
C4) 18188
Discriminator
:
AM
455
KC
(5)
18188
Discriminator
Transistors - cote (1) 2SC668E
FM
RF Amplifier
(6) SIA3
AM
Biasing
(2) 2SC545C
FM Local Oscillator
(7) 18188
AM Detector
(3) 28C668C
FM Converter
(8) SIA3
FM Oscillator Stabilizer
(4) 2S8C545E
FM
ist IF Amplifier
(9) SZ-8
Voltage Detector
(5) 28C537
FM 2nd IF Amplifier
Output Power -------- Maximum
3,000 mW
(6) 28CS537
FM 3rd IF Amplifier
|
Undistorted
2,000 mW
(7) 2SA222
AM Converter
Power Supply --------- 12 volts, 8xUM-1 (size "D'' flashlight battery)
(8) 28C537
AM Local Oscillator
or AC adaptor (D12-815)
(9) 28C537E
AM 1st IF Amplifier
'
Current Drain --------- No signal
30 mA
(10) 2SC537
AM
2nd IF Amplifier ©
Maximum
420 mA
(11) 2SD187
Squelch Control
Speaker oe ese eceeee scenes 5"x7' oval type permanent dynamic
(12) 2SB303
Audio Amplifier
.
4 ohm voice coil impedance
(13) 2SB186A
Audio Amplifier
Cabinet Dimensions ------ 1514"(390mm)
wide x 914" (240mm) high
(
x 484"
(240mm) deep
(15) 2SB187
Driver
Net Weight -----+-++++- 10 ibs. (4.5 kg)
Coil
'
Adjust- Pate
ment
or
12
|°320KC
320KC
Ft
ee
Signal Generator|Trimmer
Fre-
|Modula-
Indication
Adjust-
ment
|
quency
tion
Max. Output
TO
———————
Adjustment
Curve
Sequence
of
Wave
| Alignment
Testing
Equipment
Connection
Alignment
Range | Frequency
:
|
point to TP-1 an oscilloscope to
|
test point TP-
FM RF ALIGNMENT
Detune T7 and tune T6 for max.
|
gain
and
symmetry
of
response
curve.
tune
T-5 for max.
gain
and sym-
metry
of response
curve.
tune
T-4 for
max
gain
and
sym-
metry
of response
curve.
tune T-7 for symmetry and max.
gain of response
curve.
Coil
:
Adjust-
Dial
Pointer
ment
T-2
104.0 MC
Signal
Generator
Freque-
|Modula-
Trimmer
Adjust-
ment
Indicator
ncy
tion
T-3
104.0 MC | 104.0 MC | 22.5 KC;
Ct-2
Max output
104.0 MC | 22.5 KC
Ct-1
Max output
a ai a
ta a 2 s
cial
ay a o
i O O
e e e
EF i P e e e
= at a c i b e ,
wa .
o e e
oF
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