Sony D-F21 / D-F22ST / ICD-BP220 Service Manual ▷ View online
4
D-F21/F22ST
Locating the controls
For details, see pages in parentheses.
CD player (front)
1 i (headphones)
jack
(page 6)
(page 6)
7 Display
(pages 8 - 14)
4 VOLUME
control
(page 6)
(page 6)
5 MENU/PRESET +
button
(pages 8, 11, 12)
(pages 8, 11, 12)
2 OPEN button
(page 6)
3 SOUND/
PRESET –
button
(pages 11 - 13)
button
(pages 11 - 13)
qa DC IN 4.5 V
(external power
input) jack
(page 18)
input) jack
(page 18)
8
u (play/pause)
button
(pages 6, 7)
button
(pages 6, 7)
9
x (stop) •RADIO OFF
button
(pages 7, 9, 11, 15)
button
(pages 7, 9, 11, 15)
q; Strap holes
6 RADIO ON•BAND/
MEMORY button
(pages 9 - 12)
(pages 9 - 12)
qd HOLD switch
(page 14)
qs
./ >
(AMS/search) •
TUNE –/+ buttons
(pages 7 - 9, 11)
(AMS/search) •
TUNE –/+ buttons
(pages 7 - 9, 11)
CD player (inside)
qg AVLS switch
(page 14)
CD player (rear)
qf ESP switch
(page 13)
qh E13 model:
MONO/ST (stereo) switch (page 10)
Other models:
LOCAL/DX switch (page 10)
Other models:
LOCAL/DX switch (page 10)
qk Battery compartment
(page 17)
qj STEP switch
(page 12)
SECTION 2
GENERAL
This section is extracted
from instruction manual.
from instruction manual.
5
D-F21/F22ST
Note : Follow the disassembly procedure in the numerical order given.
3-2. LID ASSY, UPPER
SECTION 3
DISASSEMBLY
3-1. “LID, BATTERY CASE”, CABINET (FRONT) ASSY
1
B 2x10
3
B 2x10
4
claws
0
cabinet (upper) assy
5
claws
6
claws
7
claws
8
9
2
lid, battery case
boss
1
claws
2
lid assy, upper
cabinet (front) assy
6
D-F21/F22ST
3-3. MAIN BOARD, MD ASSY
3-4. OPTICAL PICK-UP, MOTOR
1
CN501
4
MD assy
7
MAIN board
cabinet (lower) sub assy
knob (HOLD)
terminal (+.–), battery (BT400)
terminal (–), battery (BT402)
S803
2
CN502
5
S812
6
S813
3
CN503
1
B 1.7x5
3
B 1.7x5
7
P 1.4x3.5
9
B 1.4x2.3
0
rack
8
retainer, shaft
qa
screw (feed) assy
qd
shaft, standard
qs
pick-up block, optical
4
cover, gear
2
motor assy, turntable (M502)
5
motor assy, sled (M501)
chassis
6
gear (B)
Note: When installing, fit the knob (HOLD) and S803.
7
D-F21/F22ST
digital
voltmeter
voltmeter
100 k
Ω
TP81 (VT)
i
jack (J302)
set
16
Ω
level meter
(range: 0.5–5 V ac)
(range: 0.5–5 V ac)
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
AM RF signal
generator
generator
TP3 (RF-IN)
FM RF signal
generator
generator
0.01
µ
F
set
TUNER SECTION 0 dB = 1 µV
• FM Section
Setting:
RADIO ON•BAND/MEMORY button : FM
STEP switch
RADIO ON•BAND/MEMORY button : FM
STEP switch
: 10k
75 kHz frequency
deviation by 1 kHz signal
output level : as low as possible
deviation by 1 kHz signal
output level : as low as possible
• AM Section
Setting:
RADIO ON•BAND/MEMORY button : AM
STEP switch
RADIO ON•BAND/MEMORY button : AM
STEP switch
: 10k
30% amplitude
modulation by
400 Hz signal
modulation by
400 Hz signal
• Connecting Level Meter (FM and AM)
• Connecting Digital Voltmeter (FM and AM)
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
done by the trimmer capacitors.
• For FM adjustment, fix the FM RF coil (L1) as shown next page
and then perform tracking adjustment at L2 and CT1.
Lastly check the voltage value.
Lastly check the voltage value.
• For AM adjustment, fix the ferrite-rod antenna (L3) as shown
next page and then perform tracking adjustment at L4 and CT3.
Lastly check the voltage value.
Lastly check the voltage value.
Adjustment Location: See page 8.
SECTION 4
ELECTRICAL ADJUSTMENTS
FM FREQUENCY COVERAGE
CHECK
Frequency Display
87.5 MHz
108 MHz
Reading on Digital voltmeter
2.5 ± 1.5 V
7.0 ± 4.0 V
Adjustment Part
<confirmation> <confirmation>
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L2
CT1
87.5 MHz
108 MHz
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
450 kHz
AM FREQUENCY COVERAGE
CHECK
Frequency Display
530 kHz
1,710 kHz
Reading on Digital voltmeter
1.0 ± 0.5 V
5.2 ± 0.7 V
Adjustment Part
<confirmation> <confirmation>
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L4
CT3
620 kHz
1,400 kHz
