Sony D-F21 / D-F22ST / ICD-BP220 Service Manual ▷ View online
3
D-F21/F22ST
SOUND/
PRESET
PRESET
–
S811
L3
AM
FERRITE-
ROD
ANTENNA
S801
CD DOOR
OPEN
S801
– MAIN BOARD (SIDE B) –
RF-IN
TAP802
– MAIN BOARD (SIDE A) –
SECTION 1
SERVICE NOTE
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK
OR BASE UNIT
OR BASE UNIT
The laser diode in the optical pick-up block may suffer electro-
static breakdown because of the potential difference generated by
the charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic breakdown and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.
static breakdown because of the potential difference generated by
the charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic breakdown and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.
Precautions for Checking Emission of Laser Diode
Laser light of the equipment is focused by the object lens in the
optical pick-up so that the light focuses on the reflection surface
of the disc. Therefore, be sure to keep your eyes more then 30 cm
apart from the object lens when you check the emission of laser
diode.
optical pick-up so that the light focuses on the reflection surface
of the disc. Therefore, be sure to keep your eyes more then 30 cm
apart from the object lens when you check the emission of laser
diode.
Before Replacing the Optical Pick-Up Block
Please be sure to check throughly the parameters as par the “Opti-
cal Pick-Up Block Checking Procedures” (Part No.: 9-960-027-
11) issued separately before replacing the optical pick-up block.
Note and specifications required to check are given below.
cal Pick-Up Block Checking Procedures” (Part No.: 9-960-027-
11) issued separately before replacing the optical pick-up block.
Note and specifications required to check are given below.
• FOK output : IC601 eg pin
When checking FOK, remove the lead wire to disc motor.
• RF signal P-to-P value : 0.45 ± 0.1 Vp-p
• The repairing grating holder is impossible.
• The repairing grating holder is impossible.
Laser Diode Checking Methods
During normal operation of the equipment, emission of the laser
diode is prohibited unless the upper lid is closed while turning ON
the S801. (push switch type)
The following two checking methods for the laser diode are
operable.
During normal operation of the equipment, emission of the laser
diode is prohibited unless the upper lid is closed while turning ON
the S801. (push switch type)
The following two checking methods for the laser diode are
operable.
• Method:
Emission of the laser diode is visually checked.
1. Open the upper lid.
2. With a disc not set, turn on the S801 with a screwdriver having a
2. With a disc not set, turn on the S801 with a screwdriver having a
thin tip as shown in Fig.1.
or TAP802 is shorted as shown in Fig.2.
Note: Do not push the detection lever strongly, or it may be bent
or TAP802 is shorted as shown in Fig.2.
Note: Do not push the detection lever strongly, or it may be bent
or damaged.
3. Press the N X button.
4. Observing the objective lens, check that the laser diode emits
4. Observing the objective lens, check that the laser diode emits
light.
When the laser diode does not emit light, automatic power
control circuit or optical pick-up is faulty.
In this operation, the objective lens will move up and down 5
times along with inward motion for the focus search.
When the laser diode does not emit light, automatic power
control circuit or optical pick-up is faulty.
In this operation, the objective lens will move up and down 5
times along with inward motion for the focus search.
Fig. 2
Fig. 1
detection lever
detection lever
main board
S801
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.
