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Sony ICF-6800W - Service Manual

Sony ICF-6800W
60 pages
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ICF-6800W
AEP
Model
E
Model
UK
Model
Canadian
Model
FM/AM
MULTI-BAND
RECEIVER
SPECIFICATIONS
Power
Requirements:
120
V
ac,
50/60
Hz
(Canadian
model)
Frequency
Ranges:
FM:
87.5
108
MHz
(3.43
2.78m)
Power
Consumption:
Maximum
Power
Output:
110,
120,220
or
240
V
ac
adiustable,
50/60
Hz
(AEP,
E,
UK
model)
9V
dc
Battery
size
“‘D’’,
6
pcs
Car
battery
cord
DCC-130
for
12
V
car
battery
input:
QW
ac
Outputs:
900
mW
at
10%
distortion
in
dc
operation
MW:
530
1,605
kHz
(566
187
m)
SW:
1.6
30
MHz
(187.5
10m)
TIMER
(minijack)..
2...
ee
eee
1
REC
OUT
(minijack).
.
2...
2...
2405
1
output
level:
0.8
mv
(—60
dB)
output
impedance:
1
kQ
:
.
EARPHONE
(minijack).
.....-+-+..-.
1
Speaker:
Approx.
10cm
(4
inches)
dia.
for
8
Q
earphone
;
HEADPHONES
(stereo
binaural
jack)......
1
Dimensions:
Approx.
453
(w)
x
184
(h)
x
227
(d)
mm
for
8
stereo
Be
ronntal
Kesdohones
17%
(w)
x
7%
(h)
x
9
(d)
inches
Weight:
Approx.
5.9
kg,
131b
with
batteries
Antennas:
FM:
telescopic
antenna
SW:
telescopic
antenna
external
antenna
terminals
(50
7592)
MW:
built-in
ferrite-rod
antenna
external
antenna
terminals
(low
impedance}
ATTENTION
AU
COMPOSANT
AYANT
RAPPORT
°
A
LA
SECURITE
!
LES
COMPOSANTS
!IDENTIFIES
PAR
UN
TRAME
ET
UNE
MARQUE
A\
SUR
LES
DIAGRAMMES
SCHE-
MATIQUES,
LES
VUES
EXPLOSEES
ET
LA
LISTE
DES
PIECES
SONT
CRITIQUES
POUR
LA
SECURITE
DE
FONCTIONNEMENT.
NE
REMPLACER
CES
COMPOSANTS
QUE
PAR
DES
PIECES
SONY
DONT
LES
NUMEROS
SONT
DONNES
DANS
CE
MANUEL
OU
DES
SUPPLEMENTS
PUBLIES
PAR
SONY.
SAFETY-RELATED
COMPONENT
WARNING
!!
COMPONENTS
IDENTIFIED
BY
SHADING
AND
MARK
A
ON
THE
SCHEMATIC
DIAGRAMS,
EXPLODED
VIEWS
AND
IN
THE
PARTS
LIST
ARE
CRITICAL
TO
SAFE
OPERATION.
REPLACE
THESE
COMPONENTS
WITH
SONY
PARTS
WHOSE
PART
NUMBERS
APPEAR
AS
SHOWN
IN
THIS
MANUAL
OR
IN
SUPPLEMENTS
PUBLISHED
BY
SONY.
SONY.
SERVICE
MANUAL

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Summary

SECTION 1 OUTLINE

MOS IC Handling Precautions

Precautions for handling MOS ICs to prevent damage from static electricity.

Circuit Description - PLL Synthesizer

Explains the PLL synthesizer's role in receiver stability and basic operation.

VCO2 Operation and Frequency Control

Details VCO2 operation, frequency steps, and control mechanisms.

Filter Functions and Frequency Conversion

Explains filter usage and frequency conversion processes in the receiver.

VCO1 Frequency Range Adjustment Necessity

Discusses why adjusting VCO1's frequency range is important for proper operation.

PLL Circuit Locking by VCO2

Explains the role of VCO2 in locking the PLL circuitry and maintaining stable reception.

Block Diagram Overview

Provides a system-level block diagram illustrating the receiver's architecture.

SECTION 2 DISASSEMBLY

Rear Case Removal

Step-by-step guide for removing the rear case of the receiver.

Front Panel Removal

Procedures for removing the front panel.

Attaching SW Band Selector Knobs

Steps for attaching the SW Band Selector knobs.

Middle Case Removal

Instructions for detaching and removing the middle case of the unit.

Main Chassis Removal

Steps for disassembling and removing the main chassis assembly.

Board Removals

Procedures for removing MW, Main, and Scale Drum boards.

Chassis (A) and Counter Board Removal

Steps for removing the Chassis (A) and Counter boards.

Top Case Removal

Guide for safely removing the top case cover.

Preselector Board Removal

Instructions for detaching the preselector board from the chassis.

Dial Cord Stringing Procedures

Detailed steps for stringing FM, Preselector, and Scale Drum dial cords.

SECTION 3 ADJUSTMENTS

FM Alignment and Tracking

Procedures for FM IF alignment, frequency coverage, and tracking adjustments.

MW Alignment and Tracking

Steps for MW IF alignment and tracking adjustments.

VFO and Mixer Adjustments

Procedures for VFO frequency coverage and mixer balance adjustments.

Oscillator Adjustments

Steps for adjusting 10 MHz and 18.6 MHz oscillator output levels and frequencies.

BFO, IF, and Preselector Adjustments

Procedures for BFO, 1st IF, and preselector frequency/tracking adjustments.

VCO Adjustments

Detailed procedures for adjusting VCO1 and VCO2 frequency coverage.

SECTION 4 DIAGRAMS

Mounting Diagram (1)

Shows the mounting positions of semiconductors and diodes on the circuit board.

Mounting Diagram (2)

Illustrates the mounting of components on various boards like Power Amp, MW, Switch, Lamp.

SECTION 5 EXPLODED VIEWS

SECTION 6 ELECTRICAL PARTS LIST

Semiconductors

List of transistors, diodes, LEDs, and thermistors with part numbers.

Integrated Circuits (ICs)

List of all integrated circuits used in the receiver with part numbers.

Transformers, Coils, and Capacitors

Lists of transformers, coils, and capacitors with part numbers and specifications.

Resistors, Switches, and Jacks

Lists of resistors, switches, and jacks with their respective part numbers.

Miscellaneous and Accessories

Catalog of miscellaneous items and packing materials included in the manual.

Summary

SECTION 1 OUTLINE

MOS IC Handling Precautions

Precautions for handling MOS ICs to prevent damage from static electricity.

Circuit Description - PLL Synthesizer

Explains the PLL synthesizer's role in receiver stability and basic operation.

VCO2 Operation and Frequency Control

Details VCO2 operation, frequency steps, and control mechanisms.

Filter Functions and Frequency Conversion

Explains filter usage and frequency conversion processes in the receiver.

VCO1 Frequency Range Adjustment Necessity

Discusses why adjusting VCO1's frequency range is important for proper operation.

PLL Circuit Locking by VCO2

Explains the role of VCO2 in locking the PLL circuitry and maintaining stable reception.

Block Diagram Overview

Provides a system-level block diagram illustrating the receiver's architecture.

SECTION 2 DISASSEMBLY

Rear Case Removal

Step-by-step guide for removing the rear case of the receiver.

Front Panel Removal

Procedures for removing the front panel.

Attaching SW Band Selector Knobs

Steps for attaching the SW Band Selector knobs.

Middle Case Removal

Instructions for detaching and removing the middle case of the unit.

Main Chassis Removal

Steps for disassembling and removing the main chassis assembly.

Board Removals

Procedures for removing MW, Main, and Scale Drum boards.

Chassis (A) and Counter Board Removal

Steps for removing the Chassis (A) and Counter boards.

Top Case Removal

Guide for safely removing the top case cover.

Preselector Board Removal

Instructions for detaching the preselector board from the chassis.

Dial Cord Stringing Procedures

Detailed steps for stringing FM, Preselector, and Scale Drum dial cords.

SECTION 3 ADJUSTMENTS

FM Alignment and Tracking

Procedures for FM IF alignment, frequency coverage, and tracking adjustments.

MW Alignment and Tracking

Steps for MW IF alignment and tracking adjustments.

VFO and Mixer Adjustments

Procedures for VFO frequency coverage and mixer balance adjustments.

Oscillator Adjustments

Steps for adjusting 10 MHz and 18.6 MHz oscillator output levels and frequencies.

BFO, IF, and Preselector Adjustments

Procedures for BFO, 1st IF, and preselector frequency/tracking adjustments.

VCO Adjustments

Detailed procedures for adjusting VCO1 and VCO2 frequency coverage.

SECTION 4 DIAGRAMS

Mounting Diagram (1)

Shows the mounting positions of semiconductors and diodes on the circuit board.

Mounting Diagram (2)

Illustrates the mounting of components on various boards like Power Amp, MW, Switch, Lamp.

SECTION 5 EXPLODED VIEWS

SECTION 6 ELECTRICAL PARTS LIST

Semiconductors

List of transistors, diodes, LEDs, and thermistors with part numbers.

Integrated Circuits (ICs)

List of all integrated circuits used in the receiver with part numbers.

Transformers, Coils, and Capacitors

Lists of transformers, coils, and capacitors with part numbers and specifications.

Resistors, Switches, and Jacks

Lists of resistors, switches, and jacks with their respective part numbers.

Miscellaneous and Accessories

Catalog of miscellaneous items and packing materials included in the manual.

Sony ICF-6800W Specifications

General IconGeneral
Tuning SystemAnalog
Frequency Range (FM)87.5 - 108 MHz
Power Output1.5 W
TypeRadio Receiver
SpeakerBuilt-in

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