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
5
ICF-C1200
1-
C113
C108
CF101
L104
L101
C212
C202
C118
T101
C201
C207
C205
R204
C103
C211
C214
C213
C206
C204
C410
R113
R129
R112
R202
R205
R201
R203
BCE
Q201
BCE
Q202
C210
C215
C208
C203
C209
C120
C122
D108
CT102
IC201
1
5
8
16
12
9
D109
TP
(3V)
TP
(76K)
+
+
33k
TP1 (76k)
TP(3V) 
1
µ
F
frequency 
counter
 MAIN BOARD   (SIDE A)
VCO Adjustment
Procedure :
        
FM  RF signal
generator
Carrier frequency : 98MHz 
Modulation : No modulation
Output level : 1.38mV (–55dB)
set
telescopic
antenna
terminal
0.01  F
µ
1. Connect the frequency counter to TP (76k) and TP (3V) as shown
the figure below.
2. Turn the set to 98MHz.
3. Adjust RV101 for 76kHz reading frequency counter.
Standard value:75.5kHz to 76.5kHz.
Adjustment Location:
[MAIN BOARD] (SIDE A)
CT101: AM Tracking Adjustment
L102: AM Tracking Adjustment
L105: AM Frequvency Coverage Adjustment
RV101: VCO Adjustment
T101: AM IF Adjustment
L103: FM Tracking Adjustment
CT102: FM Tracking Adjustment

Download Sony ICF-C1200 Service Manual (Repair Manual)

Here you can view online or download Sony ICF-C1200 Service Manual in pdf. This Service Manual can help you recover, restore, fix, disassemble and repair Sony ICF-C1200 Audio. Information contained in Sony ICF-C1200 service manual (repair manual) typically includes:

  • Disassembly, troubleshooting, programming, maintenance, remote, adjustment, installation and setup instructions.
  • Schematics, wiring and block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Parts list (bill of materials).