Sony ICF-B200 User manual

1
ICF-B200
SERVICE MANUAL
US Model
Canadian Model
AEP Model
Ver 1.0 2001. 01
FM/AM RADIO
Ver 1.3 2001. 02
Sony Corporation
Audio Entertainment Group
General Engineering Dept.
9-925-744-13
2001B0400-1
© 2001. 2
Frequency range
FM : 87.5 – 108 MHz
AM : 530 – 1,605 kHz
Speaker
Approx. 4.5 cm (1 3/4inches) dia., 8 ohms
Power output
60 mW (Using the built-in rechargeable
battery)
90 mW (Using size AA (R6) dry batteries, not
supplied)
Output
vjack (minijack)
Power requirements
Built-in nickel-cadmium (2.4 V, 300 mAh,
Ni-Cd) battery or 3 V DC, two size AA (R6) dry
batteries
Dimensions
Approx. 163 ×80 ×55 mm (w/h/d)
(6 1/2×3 1/4×2 1/4in)
Mass
Approx. 320 g (11.3 oz)
Approx. 355 g (12.6 oz) incl. batteries and
projecting parts
Supplied accessory
Hand strap (1)
Design and specifications are subject to change
without notice.
SPECIFICATIONS
Self-powered emergency radio
• You may use the radio right away by turning the
handle of the power generator, which charges the
built-in nickel-cadmium (Ni-Cd) rechargeable
battery. —Hand generating function
• You may also use size AA (R6) dry batteries (not
supplied).
• Audio Beacon that alerts the surroundings.
• Useful dial light when tuning in the dark.
• Water-resistant for all weather operation*.
*Do not emmerse in water
This product is designed to be water-resistant,
but should not be emmersed in water or come in
continuous contact with water.
Before installing the batteries, be sure to wipe off
drops of water on the unit.
FEATURES

– 2 –
mark1 mark2 Center
Frequency
red 10.70 MHz
blue 10.67 MHz
orange 10.73 MHz
black 10.64 MHz
white 10.76 MHz
white white 10.75 MHz
yellow 10.79 MHz
HOWTO CHANGETHE CERAMIC FILTERS
This model is used two ceramic filters of CF1 and CF3.
You must use same type of color marked ceramic filters in order to
meet same specifications.
Therefore, the ceramic filter must change two pieces together since
it’s supply two pieces in one package as a spare parts.
TABLE OF CONTENTS
1. GENERAL
Power Sources ........................................................................ 3
Playing the Radio ................................................................... 3
Useful functions ..................................................................... 3
2. SERVICE NOTE ............................................................... 4
3. DISASSEMBLY
3-1. Cabinet (Rear) Assy ........................................................... 5
3-2. Main Board Assy................................................................ 5
3-3. Main Board ........................................................................ 6
3-4. Pointer Setting .................................................................... 6
4. ELECTRICAL ADJUSTMENTS ................................. 7
5. DIAGRAMS
5-1. Printed Wiring Boards ........................................................ 9
5-2. Schematic Diagram .......................................................... 11
6. EXPLODED VIEWS
6-1. Cabinet (Rear) Section ..................................................... 13
6-2. Cabinet (Front) Section .................................................... 14
7. ELECTRICAL PARTS LIST ................................... 15
mark1 mark2mark1 mark2
CF3
CF1

– 3 –
SECTION 1
GENERAL This section is extracted
from instruction manual.

– 4 –
SECTION 2
SERVICE NOTE
•Moisture ResistantTreatment
Be sure to perform the following work when the cabinet,
telescopic antenna and knobs have been replaced in servicing :
Apply SONY grease SGL-505 (7-662-010-04) to all around the
rib of the cabinet (rear) with an applicator or other means.Also,
applysealantTSE392-W(7-432-950-03) to the telescopicantenna
mounting points on the cabinet (rear), the battery terminals, and
all around the rib of the cabinet (front) assy.
sealant TSE392-W (7-432-950-03) SONY grease
SGL-505
(7-662-010-04
)
sealant TSE392-W (7-432-950-03)
Apply SONY grease SGL-505 (7-662-010-04) to the knobs and
gears at the points specified in the figure with an applicator or
other means.
cabinet (rear) cabinet (front) assy
grease applying
points (gear)
grease applying
points
cabinet (front)
grease applying
points
cabinet (front)
grease applying points
cabinet (front)

– 5 –
Note : Follow the disassembly procedure in the numerical order given.
3-1. CABINET (REAR) ASSY
1 Open the battery case lid.
3-2. MAIN BOARD ASSY
4cabinet (rear) assy
3tapping screws
(bind 2x20)
2tapping screws
(bind 2x20)
3PTP 3x10
5generator
4PTP 3x10
!¡ MAIN board assy 8screw (M1.7)
9VOLUME board
!º holder (VOL)
7JACK board
6claws
2knob (VOL
)
1knob (TUNING)
Note for installation :
When installing the MAIN board assy,
align the two slide switches with the levers.
SECTION 3
DISASSEMBLY

– 6 –
3-3. MAIN BOARD
Note : When installing, setting the pointer.
3-4. POINTER SETTING
7MAIN board
3gear (midway
)
1retainer
2tuning shaft
6claws
5lamp
8LED board
4dial scale
gear (VC) rack
A
2gear (midway)
Note : Align part Awith the
concave of the gear (VC).
4retainer
3tuning shaft
1
Position the gear (VC) and the rack
as shown in the figure.
Note : Engage the convex with the
concave.

– 7 – – 8 –
SECTION 4
ELECTRICAL ADJUSTMENTS
AM AM RF signal
generator
30 % amplitude
modulation by
400 Hz signal
Put the lead-wire
antanna close to
the set.
set
8 Ω
speaker terminal
level meter
(range : 0.5 – 5 V ac)
FM
FM RF signal
generator
0.01 µFto FM antenna
terminal
22.5 kHz frequency deviation
by 400 Hz signal
output level : as low as possible
set
8 Ω
speaker terminal
level meter
(range : 0.5 –5 V ac)
• Repeat the procedures is each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
Adjustment Location : main board
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
455 kHz
AM FREQUENCY COVERAGE
ADJUSTMENT
Adjust for a maximum reading on level meter.
L3 CT3
520 kHz 1,650 kHz
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1 CT4
620 kHz 1,400 kHz
FM FREQUENCY COVERAGE
ADJUSTMENT
Adjust for a maximum reading on level meter.
L4 CT1
86.5 MHz 109.5 MHz
FM TRACKINGADJUSTMENT
Adjust for a maximum reading on level meter.
L2 CT2
86.5 MHz 109.5 MHz
AM
TRACKING
ADJUSTMENT
FM
TRACKING
ADJUSTMENT
AM FREQUENCY
COVERAGE
ADJUSTMENT
FM FREQUENCY
COVERAGE
ADJUSTMENT
T1
AM IF
ADJUSTMENT
L1
CT4
L3 CT3
L4 CT1
L2 CT2
–main board (component side) ––main board (conductor side) –
SECTION 5
DIAGRAMS
•IC Block Diagrams
IC1 CXA1019S
IC3 BA10324AF
12 3 45 6 7 8 9 10 15141312
11
FM
DISCRIMINATOR
AF POWER AMP AM FE FM IF
TUNING
METER
AM IF DET AGC
FM FE
23 22 21 202425 19 18 17 1629 28 27 2630
GND GND AF OUT VCC RIPPLE FILTER AF IN DET OUT AFC AGC AFC AGC IF GND METER N.C FM IF IN AM IF IN FM/AM BAND SELECT
FM/AM
IF OUT
FE GND
N.C
AM RF IN
FM RF
REG OUT
FM OSC
FM RF IN
AFC
AM OSC
VOL
NF
FM DISCRI
GND GND
1234567
8
9
10
11
12
13
14
OUT1
–IN1
+IN1
VCC
+IN2 –IN2
OUT2
OUT4 –IN4 +IN4 GND +IN3 –IN3 OUT3

– 9 – – 10 –
• Semiconductor
Location
Ref.No. Location
D1 H-4
D2 F-7
D3 F-9
D4 F-8
D5 F-7
D6 E-9
D7 F-8
D8 F-7
D9 F-8
D11 B-5
IC1 F-5
IC2 D-9
IC3 E-8
Q1 F-11
Q2 G-4
Q3 H-4
Q4 C-8
Q5 D-8
Q6 D-8
Q7 E-6
Q8 E-7
Q11 E-7
Q12 H-3
Q13 E-3
ICF-B200
5-1. PRINTED WIRING BOARDS
Note:
•X: parts extracted from the component side.
•Y: parts extracted from the conductor side.
•W: indicates side identified with part number.
•¢: internal component.
•b: Pattern from the side which enables seeing.

– 11 – – 12 –
5-2. SCHEMATIC DIAGRAM • Refer to page 8 for IC Block Diagrams.
ICF-B200
Note:
• All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or
less are not indicated except for electrolytics and tantalums.
• All resistors are in Ωand 1/4W or less unless otherwise specified.
•¢: internal component.
•2: nonflammable resistor.
•C: panel designation.
•U: B+ Line.
•H: adjustment for repair.
• Power voltage is dc 3 V and fed with regulated dc power supply
from battery terminal.
• Voltage is dc with respect to ground under no-signal (detuned)
condition.
no mark : FM
( ) : AM
< > : BUZZER ON
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production toler-
ances.
• Signal path.
F: FM
f: AM
TOTAL CURRENT
FM : 6.0mA
AM : 4.5mA
BUZZER ON : 30mA
LIGHT ON : 60mA

SECTION 6
EXPLODED VIEWS
6-1. CABINET (REAR) SECTION
NOTE:
• The mechanical parts with no reference
number in the exploded views are not supplied.
• Items marked “*” are not stocked since
they are seldom required for routine service.
Some delay should be anticipated
when ordering these items.
• -XX and -X mean standardized parts, so
they may have some difference from the
original one.
• Color Indication of Appearance Parts
Example :
KNOB, BALANCE (WHITE) ... (RED)
Parts Color Cabinet’s Color
• Accessories and packing materials and
hardware (# mark) list are given in
the last of this parts list.
6-2. CABINET (FRONT) SECTION
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
2 3-917-353-01 RING (BAND), O
3 3-018-885-01 SPRING, RING
4 3-898-411-01 PACKING, KNOB
5 3-900-151-01 SPRING, RING
*6 1-667-679-11 CONNECTOR BOARD
7 4-356-741-41 SCREW, TAPPING (BIND 2X20)
9 3-018-849-11 CABINET (REAR) (ORANGE)
9 3-018-849-21 CABINET (REAR) (BLUE)
10 3-007-833-01 TERMINAL (–), BATTERY
11 3-919-944-01 TERMINAL (+), BATTERY
*12 3-020-493-01 SHEET
13 3-020-951-01 CUSHION (Ni-Cd)
14 3-021-019-01 CUSHION (BATTERY CASE LID)
ANT1 1-501-432-11 ANTENNA, TELESCOPIC
BATT2 1-528-831-21 BATTERY PACK (Ni-Cd) (300mAh/2.4V)
(US,Canadian)
BATT2 1-528-831-31 BATTERY PACK (Ni-Cd) (300mAh/2.4V) (AEP)
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
51 3-018-950-01 SPRING (HANDLE)
52 3-018-866-01 HANDLE
53 3-898-406-01 LID, JACK
54 3-018-882-01 LID (KNOB)
*55 1-667-677-11 JACK BOARD
56 3-018-858-01 BUTTON (BUZZER)
57 3-018-879-01 PACKING (BUZZER)
58 3-372-834-01 PLATE, CLICK
*59 1-667-678-11 VOLUME BOARD
60 2-646-154-11 SCREW (M1.7X5)
61 3-018-881-01 SLIDER, POLYETHYLENE
62 3-018-943-01 SPRING (LIGHT)
63 3-018-884-11 SCALE, DIAL
64 3-018-871-01 RACK
65 3-018-870-01 POINTER
66 3-020-689-01 PIN, PARALLEL
68 3-900-147-01 SHAFT, TUNING
69 3-900-149-01 RETAINER
70 X-3374-974-1 CABINET (FRONT) ASSY (INCLUDING SP1)
(ORANGE)
70 X-3380-348-1 CABINET (FRONT) ASSY (INCLUDING SP1)
(BLUE)
71 3-018-856-01 GEAR (A)
72 3-018-857-01 GEAR (B)
73 3-018-855-01 GEAR (VC)
*74 A-3679-932-A MAIN BOARD, COMPLETE
75 3-018-853-01 GEAR (MIDWAY)
76 8-838-202-01 GENERATOR SGD11A/J-N
77 3-020-905-01 WINDOW (MOTOR)
78 3-023-214-01 PLATE (B), BLIND
79 3-018-867-01 BASE (HANDLE)
80 3-363-895-01 SCREW (M1.7)
81 3-023-216-01 PLATE (D), BLIND
83 3-831-441-99 CUSHION, STOPPER
84 3-018-868-01 KNOB (HANDLE)
85 3-018-865-01 KNOB (POWER)
86 3-018-859-01 BUTTON (LIGHT)
D1 8-719-069-94 LED TLSU124 (TUNE)
L1 1-501-732-12 ANTENNA, FERRITE-ROD (AM)
Combined parts
(Components cannot be ordered as items.)
Ref. No. Part No. Description
8 3-018-872-11 LID (COMBINED),
(ORANGE) BATTERY CASE
3-018-872-21 LID, BATTERY CASE
(BLUE) KNOB (BATT)
LEVER (BATT)
LEVER (POWER)
67 3-018-873-01 CHASSIS (COMBINED)
CHASSIS
HOLDER (ANT)
HOLDER (VOL)
RING (BASE)
RR
1
2
5
3
4
8
6
910
7
7
11
#1
BATT2
#5
12
13
14
ANT 1
55
63 64
67
72
71
76
LED board
73
B
A
#2
#2
#7
#7
60
83
57
65
68
69
80
67
75
74
(including LED board)
L1
77 56
862
86
67
61
B
81
#4
D1
#3
870 58
8
85
67
59
80
A
78
84
52
51
79 66
53
#8
54
#10
#9
#6
Combined parts
(Components cannot be ordered as items.)
Ref. No. Part No. Description
1 3-018-874-01 KNOB (COMBINED)
KNOB (TUNE)
KNOB (VOL)
8 3-018-872-11 LID (COMBINED),
(ORANGE) BATTERY CASE
3-018-872-21 LID, BATTERY CASE
(BLUE) KNOB (BATT)
LEVER (BATT)
LEVER (POWER)
– 13 – – 14 –
Ver 1.3 2001. 02 Ver 1.3 2001. 02