ICF-C1200 - Sony Audio Service Manual (repair manual)

Model
ICF-C1200
Pages
17
Size
1.14 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
icf-c1200.pdf
Date

View Sony ICF-C1200 Service Manual online

Ver 1.0  2001.03
ICF-C1200
SERVICE MANUAL
FM STEREO/AM PLL
SYNTHESIZED RADIO
SPECIFICATIONS
US Model
AEP Model
E Model
Tourist Model
9-873-106-11
2001C0200-1
© 2001.3
Sony Corporation
Audio Entertainment Group
General Engineering Dept.
2
ICF-C1200
Specifications ...........................................................................  1
1. GENERAL
...................................................................... 2
2. DISASSEMBLY
2-1. Main Board ................................................................. 3
3. ELECTRICAL ADJUSTMENTS
3-1. Tuner Section .............................................................. 4
4. DIAGRAMS
4-1. Explanation of IC Terminals ....................................... 6
4-2. Block Diagram ............................................................ 7
4-3. Printed Wiring Boards
       – Main Section (1/2) (Side A) – .................................. 8
4-4. Printed Wiring Boards
       – Main Section (2/2) (Side B) – .................................. 9
4-5. Schematic Diagram ................................................... 10
5. EXPLODED VIEWS
5-1. Main Section ............................................................. 13
6. ELECTRICAL PARTS LIST
...................................
 
14
TABLE OF CONTENTS
SECTION 1
GENERAL
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.
LOCATION AND FUNCTION OF CONTROLS
This section is extracted from
instruction manual.
r
  UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the
lead-free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed
with the lead free mark due to their particular size.)
 : LEAD FREE MARK
Unleaded solder has the following characteristics.
• Unleaded solder melts at a temperature about 40
°C higher
than ordinary solder.
Ordinary soldering irons can be used but the iron tip has to
be applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set
to about 350
°C.
Caution: The printed pattern (copper foil) may peel away if
the heated tip is applied for too long, so be careful!
• Strong viscosity
Unleaded solder is more viscous (sticky, less prone to
flow) than ordinary solder so use caution not to let solder
bridges occur such as on IC pins, etc.
• Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder
may also be added to ordinary solder.
3
ICF-C1200
SECTION 2
DISASSEMBLY
2-1. MAIN BOARD
2
 Screws (1.4X6 tapping)
4
 Screws (1.4)
5
 Claw
5
 Claw
5
 Claw
7
 Remove solder
     (three places)
Red
Cabinet (rear) ASSY
6
 
8
 
3
 
1
 
5
 Claw
Cabinet (front) ASSY
Main board
Knob (HOLD)
ANT101
S301
Brown
• Caution during assembly
  Align the hold switch(S301)
  to the knob(HOLD).
Black
Note : Follow the disassembly procedure in the numerical order given.
4
ICF-C1200
SECTION 3
ELECTRICAL ADJUSTMENTS
BAND button : AM
Volume : MIN
3-1.TUNER SECTION
AM Section
FM Section
BAND button : FM
Volume : MIN
Put the lead-wire
antenna close to
the set.
AM RF signal
generator
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
telescopic
antenna
terminal
FM RF signal
generator
22.5kHz frequency deviation by
400Hz signal.
Output level : as low as possible
0.01 uF
Adjustment Location : Main board (See page 5)
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T101
1485kHz 
<
1480kHz
>
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust part
Frequency display
 L105
531kHz <530kHz>
reading on digital
voltmeter.
Adjustment value: 2.7V
Standaed value: 2.5 to 2.9V
AM TRACKING  ADJUSTMENT
Adjust for a maximum reading on level meter.
L 102
585kHz <580kHz>
CT101
1,485kHz <1,480kHz>
Frequency Coverage Adjustment
Connect Location :
FM FREQUENCY COVERAGE CONFIRMATION
Adjust part Frequency display
Confirmation
 87.5MHz
3.0 to 4.0V
Confirmation
108MHz
9.5 to 10.5V
reading on digital
voltmeter
FM TRACKING  ADJUSTMENT
Adjust for a maximum reading on level meter.
L103
87.5MHz
CT102
108MHz
32
level meter
set
J201 (phones)
+
0dB=1
µV
<            > : US model
MAIN BOARD  (SIDE A)
S308
(JOG SWITCH)
BAT401
PAS
TP
(VT)
C405
R404
C412
R403
R314
R315
R405
C404
C301
C406
C407
R401
R402
D402
D403
BCE
Q402
B
Q
302
E
CB
T401
+
Digital
TP
(VT)
100K
voltmeter

Download Sony ICF-C1200 Service Manual (Repair Manual)

Here you can view online and download Sony ICF-C1200 Service Manual in PDF. ICF-C1200 service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sony ICF-C1200 Audio. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.