Sony WM-AF22 User manual

—-
Pa
Photo : WM—AF22
(See page13)
Mode! Name Using Similer Mechanism
Tape Transport Mechanism Type
Canadian
Model
WM-AF22
AEP Model
UK Model
E Model
WM-BF22
US Model
| WM-AF28
AEP Model
UK Model
WM-BF28
WM-31/41
MF-WMAF 22-04
MF-WMBF22-04
SPECIFICATIONS
FM: 87.5 - 108 MHz (Italian model)
87.6 - 107 MHz (West German model)
87.6 - 108 MHz (Other model)
AM: 526.5 - 1,606.5 kHz (italian model)
5§31-1,602 kHz (West German model)
530 - 1,605 kHz (Other model)
40 - 15,000 Hz
For E-model
5SmW +5 mW at DC operation
(at 10% harmonic distortion) load impedance 16ohms
For other countries:
10 mW+10mW at DC operation
(at 10% harmonic distortion) load impedance 32 ohms
Frequency range
Frequency response
Power output
Power requirements 3v 0c
Two R6 (size AA) batteries
Sony rechargeable battery BP-700
DC IN 3V jack accepts
Optional Sony AC-D2L AC power adaptor
available
in
United
Kingdom
for
use
on
240V
AC,
50
Hz.
available
in
Canada
for
use
on
120V
AC,
60
Hz
available
in
other
countries
for
use
on
120V
AC,
60
Hz
or
220V AC, 50 Hz
Battery
life
Approx.
8
hours
on
tape
playback
and
approx.
30
hours
on
FM
reception,
using
Sony
alkaline
batteries
AM3
(N).
Dimensions
WM-AF22/BF22:
Approx.
88
x
134
«31.5
mm
(w/h/d)
Other models: Approx. 88 x 134 «32.5 mm (w/h/d)
not incl. projecting parts and controls
WM-AF22/BF22: Approx. 2259
Other models: Approx. 230g
incl.
batteries,
not
incl.
other
accessories
:
For
Canada
and
the
United
Kingdom:
Stereo
Headphones
' Weight
Accessories supplied
Their defferences are shown in the table below.
WM-AF22
WM-BF22
WM-BF28
WN-AF 28
This
instruction
manual
covers
WM-AF22/BF22and
WM-AF
28
/BF
28.
Rechargeable | Battery
charger
(BC-700)
Headphones
Earphones
FM sensitivity
selector
Stereo
headphones
For United
Kingdom:
Stereo
headphones
For other
countries:
Stereo
earphones
Ear adaptors
DX/LOCAL
Optional
Supplied Supplied
Optional
FM STIMONO
Stereo
headphones
DX/LOCAL
Optional
Accessories
—Note
lf an AC power adaptor or a car battery cord
NiICROFILM
(Open-air type, 1)
For
other
countries:
Stereo
earphones
(Open-air
type,
1)
Ear adaptor (2)
For only WM-AF28/BF 28: Rechargeable battery (1)
Battery charger (1)
AC power adaptor AC-D2L
Car battery cord DCC-70
Battery case EBP-500B
Rechargeable battery BP-700
Battery charger BC-700
Stereo active speaker system
SRS-30, SRS-50
not manufactured by Sony is used, a fuse
the car battery cord and the polarity of the
plug must be as illustrated.
Ya
ZB
JF
RADIO
CASSETTE
PLAYER
must be installed in the AC power adaptor or

a
pw
WM-AF22/AF28/BF22/BF28
Flexible
Circuit
Board
Repairing
@
Keep
the
temperature
of
the
soldering
iron
around
270°C
during
repairing.
®
Do
not
touch
the
soldering
iron
on
the
same
conduc-
tor
of
the
circuit
board
(within
3
times).
®
Be
careful
not
to
apply
force
on
the
conductor
when
soldering
or
unsoldering.
Notes
on
chip
component
replacement
@
Never
reuse
a
disconnected
chip
component.
®
Notice
that
the
minus
side
of
a
tantalum
capacitor
may
be
damaged
by
heat.

_
WM-AF22/AF28/BF22/BF28
SECTION1
|
DISASSEMBLY AND INSTALLATION —
“41-1,
CASSET
HOLDER
ASSY
REMOVAL
1—3,
CASSET
HOLDER
ASSY
INSTALLATION
1)
Open
the
cassette
holder,
Note
:Follow
the
disassembly
procedure
the
numerical
2)
Move
the
left
latch
in
the
direction
of
the
arrow
order
given,
—@ to release it,
3) Release the right latch.
4) Remove the cassette up spring.
1—2.
CABINET
(REAR)
ASSY
REMOVAL
i
Note :Follow the disassembly procedure the numerical
order given.
1) Insert a driver (—) in to the portion (3),
2) Move the driver in the direction of the arrow @).
3) Release the claw (%),
XO xo
cabinet
(front)

WM-AF22/AF28/BF22/BF28 |
SECTION 2
—. MECHANICAL AND ELECTRICAL ADJUSTMENTS
MECHANICAL ADJUSTMENTS
PRECAUTION
1, Clean the following parts with a denatured—alcohol—
moistened swab :
playback head
capstan idlers
rubber belts 3
2. Demagnetize the playback head with a head demagne—
pinch roller
tizer,
3. Do not use a magnetized screwdriver for the adjustments,
4, After the adjustments, apply suitable locking compound
to the parts adjusted,
5. The adjustments should be performed with the rated
| power supply voltage unless otherwise noted, |
Torque Measurement
(0.31—0,.6302 + inch)
| , 1—2.5g > cm
Tape Tension Measurement
c
CQ-403A more than 90g (1.260z)
Fast Forwand 55— 150g - cm
ELECTRICAL ADJUSTMENTS
CASSETTE SECTION
Playback Head Phase Check
Note :When replacing the head, check the both L-ch and R-ch
phases, | 7
Procedure :
Phase Check
Mode : playback
test tape :
P-4-A063 L-CH
(6.3kHz, —10dB) 180 oscilloscope
fn i
headphones jack
(earphones)

Tape Speed Adjustment
Procedure :
Mode : playback
speed checker or
test
tape
digital
frequency
WS-48A
counter
(3kHz,0dB)
headphones jack
(earphones)
Specification :
speed checker digital frequency counter
Frequency difference between the beginning and the end
of the tape should be within+2.5% (+75%Hz).
Adjustment Location
ELECTRICAL ADJUSTMENTS
-|TUNER SECTION
AM rf signal
generator
Put the lead-wire
antenna close to the set.
30% amplitude
ei modulation by
400Hz signal
Output lavel: as low as possible
=
FM rf signal
generator
22.5kHz frequency
deviation by 1kHz signal ;
Output level: as low as possible FM antenna terminal
Note :
For adjustment of WM—BF22/BF28 BAND SW at STEREO.
WM-AF22/AF28/BF22/BF28
headphones jack
@Repeat the procedures in each adjustment several times,
and the frequency coverage and tracking adjustments
should be finally done by the trimmer capacitors.
( ):WG model
: f ):IT model
FM Frequency Coverage Adjustment ((.)) = WG, IT model
Pointer Adjustment
SG jeaueney
position part
86.0MHz
((87,.35MHz))
109.5MHz
(107.8MHz)
[108,25MHz]
‘f minimum
maximum
FM Tracking Adjustment
frequency
86. OMHz maximum
(87,35MHz) .
- 109.5MHz
(107.8MHz) maximum
[108.25MHz]
os Frequency Coverage Adjustment
pen Adjustment Reading on |
, 505kHZ -
minimum ((51 6 '5kHz))
maximum
, 1,680kHz
meumum ((1,631.3kHz))
MW Tracking Adjustment
SG and set
frequency
maximum
MW IF Alignment
SG and set
frequency
455kHz (468kHz) a a a maximum
( ): UK model
ADJUSTMENT LOCATION
14 ’ Jr
‘Gu
component side
— 5h —

WM-AF22/AF28/BF22/BF28 |
SECTION 3
DIAGRAMS
Note:
@ oO-——-: parts extracted from the component side. Semiconductor Location
@ e—— : parts extracted from the conductor side.
e @ =: parts mounted on the conductor side.
@ | & indicates side identified with part number.
e ®) : Through hole.
@ 5552 : Pattern of the rear side. |
@ [-] : Chip components extracted from the rear side
ISS123 XN1501
A Ke
2 2
5 1
ila
3
2
XN6501
6
5
4
]
2
3
6
OK
2
4
SOK
3
— TA8122AF
24 13
' 2
(Top view)

re)
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WM-AF22/AF28/BF22/
:
HP9O!
PB HEAD
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i
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|
oS
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yf
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|
: :
.
Pore
WM-AF22/AF28
:
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me
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:
:
Pt
°
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:
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[sens | NORMAL
LOCAL i
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px
$30I-1
WM-BF 22/BF 28 |
MONO
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st
—
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ww- |__WG | 27P|30P | 10P |
Hate [1 T | 27P|30Pp | 13P |
EAEP, UR] 22P[24P | 10P |
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PHONES
ORY
SATTERY
ERNIE
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SIZE°AA”
(EC DESIGNATION R6)
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;
|
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ne
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|
RADIO/TAPE
ph
oe
rs,
TAPE
——>
RADIO
AM
<—
FM
.
{RADIO
OFF
}
|
fo.
’
Ly
® 5
‘ 4
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i
Bee eae

'WM-AF22/AF28/BF22/BF28 = WM-AF22/AF28/BF22/BF28
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6
7
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qa
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DECODER
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EQ
SWITCH
7
|
5, g r Q101, Q201 :
5 S ma XNI5O1 fosclea 8 (2/0)
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5
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POWER
AMP
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(Se
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Len > & ‘ a, aie Te ee eee ae i ae Ee a PHONES j4 §
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15
5
=~
8
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2
ad
HP901
im
foxcioe
B(!/2)
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2
«$304
PB HEAD 0 LA4570M l_/\ power
PRE AMP
16 colo 1000p : ay 8
Ren = : = oie. 8 M901
Lt ‘- ca — } 8 W) moToR
Xneso! in ahieiee
| : :
r a ae 2.2 6 J301
| 5 | S57, ‘E A ears
|
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a
tae
ie
a
| Fe iia a cee sae ce ae AIRE 8h TOTAL CURRENT
$301-2 : SAGE. 305-56 TAPE PLAY: 1 1 5mA
| ayy oar 3% ia REW; 1OSmA
|
cst
;
CrO2/MET
AL@-
NORMAL
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Te
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eran
is
s
DRY
BATTERY
| SIZE "AA"
EC DESIGNATION R6)
7
—
>
-
—
-
—
-
—
-
2Pcs
3V.
pot:
3
.
eae
|
e
Total
current
is
measured
with
no
cassette
installed.
e All capacitors are in wF unless otherwise noted. pF: uwuF © Power voltage is dc 3V and fed with requrated de power.
5OWV or less are not indicated except for electrolytics © supply from external power voltage jack.
and tantalums. WM- a eh LOCAL / DX
.
A:
internal
component.
WM-BF22/BF28
Anais
@
Voltage
and
waveforms
are
de
with
respect
to
ground
@ wt: printed resistor. §301-2 | ; | taPE under no-signa! (detuned) conditions.
- no mark: PLAY 7
$302 BAND sone ( ): FM
$303 FUNCTION TAPE © << 7: AM
cate OWER Voltage variations may be noted due to normal. produc-
tion tolerances. |
®
,
;
e
Signal
path.
|
e
[7]:
adjustment
for
repair.
4
a
>
FM
>>
:PB(DECKA)
14

NOTE:
The mechanical parts with no reference
number in the exploded views are not
supplied.
‘The construction. parts of an assembled
Part are indicated with a collation num-
ber in the remark column.
Items marked “*" are not stocked since
they .are seldom required for routine
service. Some delay should be antici-
pated when ordering these items.
(1)
RXEX P SES
SECTION 4
EXPLODED VIEW _
Due to standardization, parts with part
number suffix -XX and -X may be dif-
ferent from the parts specified in the
components used on the set.
Color Indication of Appearance Parts
Example:
(RED)... KNOB, BALANCE (WHITE)
7. T
Cabinet’s Color - Parts’ ‘Color.
y
b
\:
/
\
.
WM -AF22/AF28/BF22/BF28
The components identified by
mark or dotted line with mark
are critical for safety.
epiace only with part number
specified.
Les composants identifiés par une
marque sont critiques pour la
sécurité. .
Ne ies remplacer que par une
piece portant le numéro spécifé.

~WM-AF22/AF28/BF22/BF28
Ref.No Part No.
NON BD DD DODDS DD Fe Ft ot et et et et pe
SESE SSR OD OUND ENMOWOMU DP ONAMNEwWNe
3-346-518-01
3-346-522-01
X-3346-503-1
X-3346-505-1
3-335-604-01
3-346-527-01
3-346-539-01
3-346~-526-01
3-346-528-01
3-346-513-0601
3-346-514-01
3-346-515-01
3-346-512-01
—3-346-512-11
3-346-513-11
3-346-514-11
3-346-515-11
3-335-605-01
3-346-502-01
3-343-358-01
3-346-538-01
3-346-503-01
3-346-504-01
3~346-525-01
3-346-508-01
3-346-508-11
3-346-508-21
— 3-346-508-31
3-346-721-01
3-346-721-11
3-346-721-21
3~346-721-31
Description — Remark
CLIP, BELT
PLATE, LOCK
GEAR ASSY, MIDWAY
WHEEL ASSY, CAPSTAN
BELT, MIDWAY
LEVER (REW)
SPRING (FR)
LEVER (FF)
LEVER (STOP)
(WM-AF22/BF22)....BUTTON (FF)
(WM-AF22/BF22).... BUTTON (REW)
(WM-AF22/BF22)....BUTTON (STOP)
(WM-AF22/BF22).... BUTTON (PLAY)
(WM-AF28/BF28).... BUTTON (PLAY)
(WM-AF28/BF28)....BUTTON (FF).
(WM-AF28/BF28).... BUTTON (REW)
(WM-AF28/BF28)....BUTTON (STOP)
SPRING, COMPRESSION
KNOB (TU)
RING, RETAINING
SPRING (GROUND) -
POINTER
COVER, KNOB
GEAR (S REEL)
(WM-~AF22 : BLK)....CABINET (FRONT) (CF-A)
(WM-AF22 : GRY)....CABINET (FRONT) (CF-A)
(WM-BF22 : BLK)....CABINET (FRONT) (CF-A)
(WM~BF22 : GRY)....CABINET (FRONT) (CFA)
(WM-AF28 : BLK)....CABINET (FRONT)
(WM-AF28 : GRY)....CABINET (FRONT)
(WM-BF28 : BLK : AEP, IT, UK).... CABINET (FRONT)
(WM-BF28 : GRY : AEP, IT, UK)....CABINET (FRONT)
Ref.No Part No.
21
21
22
22
22
22
23
24
25
26
27
28
29
30.
31
32,
“33
34
35
35
35
35
36.
36
36
901
HPS01
ul
3-346-721-41
3-346-721-51
3-346-517-01
3~346-517-11
3-346-5)7-21
3-346-517-31
3-346-509-01
X-3346-502-1
X-3334-005-1
X-3346-504-1
3-346-516-01
3-335-608-01
3-334-089-01.
3-346~-523-01
3-335-652-01
X~3346-501-1
3-334-412-01
3-334-057-01
3~346-506-01
3-346-506-11
3-346-506-21
3-346-506-31
X-3346-541-1
X-3346-542~1
X~3346-543-1.
A~-3060-103-A
A~-3108-292-A
1-402-361-11
Description Remark
(WM-BF28 : BLK : WG).... CABINET (FRONT)
(WM-BF28 : GRY : WG).... CABINET (FRONT)
LID, BATTERY CASE (BLK) 7
LID, BATTERY CASE (WHT)
LID,BATTERY CASE (RED)
LID, BATTERY CASE (BLU)
SPRING |
TABLE ASSY, T REEL
PINCH ROLLER ASSY
GEAR ASSY, PLAY
SPRING
SPRING
GEAR, FF
LEVER (SHUT-OFF)
CUSHION (C), MOTOR
BASE ASSY, GUIDE
BELT, CAPSTAN
TERMINAL BOARD, RELAY
CABINET (REAR) (CF~C) (BLK)
(WM~AF22/BF22 : WHT)....CABINET (REAR) (CF-C)
(WM-AF22/BF22 : RED)....CABINET (REAR) (CF-C)
(WM-AF22/BF22
:
BLU)....CABINET
(REAR)
(CF-C)
(WM-BF28 : AEP, IT, UK)....(fMAX—-108MHz) ,
HOLDER (CF-B) ASSY, CASSETTE
(WM-BF28 : WG)... .(fMAX—107MHz)
HOLDER (CF-B) ASSY, CASSETTE :
(WM~AF28).... HOLDER (CF-B) ASSY, CASSETTE
(WM-AF22/AF28).... MOUNTED PCB, MAIN
PC BOARD ASSY, HEAD
ANTENNA, FERRITE-ROD (MW):