Sony icf pro 70 service manual

Page 1

Ir ,
SERVICE MANUAL

REVISED

riliil/PRiiilii

US Model
Canadian Model
AEP Model

UK Model

E Model
Australian Model

lCF-PROé'O

A EP Model
E Model

[CF-PRO 70
Photo: lCFPRO7O A .

LW/MW/SW/VHF: Dual conversion
superheterodyne . .. (iCF-PRO70 Type 1
and lCF-PROSO)
LW/MW/SW: Dual conversion super-
heterodyne . . . lICF-PRO7O Type 2~4)
FM: Superheterodyne
Frequency coverage lCF-PRO7O
Type 1: 150 kHz-108 MHz
Type 2: 150-29395 kHz and 87.6-108 MHz
Type 3: 150-26,100 kHz and 875-108 MHz
Type 4: 150-285 kHz, 531 -26,100 kHz and
87.6-108 MHz
lcF-PROBO
150 kHz-108 MHz (without using the
FRO-80 frequency converter)
11515-423 MHz (using the FRO-80)
SW/VHF/FM: Telescopic antenna . . r (iCF-
PR070 Type 1 and ICF-PROSO)
SW/FM: Telescopic antenna . . . liCF-PR070
Type 2-«4i
LW/MW: Built-in ferrite bar antenna
External antenna connector: TNC
connector . . . (except West Germany model)
7 x 3.5 cm
400 mW (at i0"/o harmonic distortion)
Earphone lack (mlnllack) (1)
8 ohm
Recording output lack (mlnllack) (1)
Output level 0.775 mV (-6() 68)
Output impedance 1 kllohrn
Power requirements 6 V DC [for radio/computer backup)
Four size AA (R6) batteries or BP-23
rechargeable battery pack (optional)
DC m 6 V lack accepts:
AC-D4 AC power adaptor (optional) lor
use on 100, 120, 220 or 240 V AC
depending on the model type of the
A004 available in your country

Circuit system

Antennas

Speaker
Power output
Output )ack

" IEEI:

MlCROFlLM

SPECIFICATIONS

DCOiZ7A or DOC-120 car battery cord
(optional) lor use with 12 V car battery
DCC~240 car battery cord (optional) tor
use with 24 V car battery

EBP5 battery case (optional) using low
size C (H14) batteries

Battery life Approx. 10 hours using Sony SUM~3{NS)
batteries
Dimensions Approx. 90 x182 x 50 mm (w/h/d)

(35/; x 7/. x 2 inches)
including projecting parts and controls.
not including the telescopic antenna
Weight Approx. 6509 (1 lb 702)
including batteries, shoulder strap and
telescopic antenna

FROM irequency converter (supplled with the ICF-PROBO only)
Shllt frequency 115 MHz

Attenuator 0 dB/-30 US

Power requirements 3 V DC, two size AA (Fifi) batteries

Battery Iile Approx. 80 hours using Sony SUM45(NS)
batteries
Dimensions Approx. 40 x 98 x 31 mm (w/h/d)

(15/. x 37/. x 1% Inches)
including projecting parts and controls
Weight Approx. 120 g (4.2 oz)
including batteries

Accessories supplied

Telescopic antenna (1)

Earphone (1)

Shoulder strap (1)

Carrying case (1)

Antenna holder (1)

Antenna plug adaptor (ENC GTNC) t1) . . . (except West Germany
model)

FRO~80 frequency converter tlcF~Pfi080 only) (1)

Wave Handbook iii

PLL SYNTHESIZEI] RECEIVER
ONY;

Page 2

. ,7 ICF-PRO70/PRO8O

LFEATURES

7

{WORLD-WIDE FREQUENCY COVERAGE 7

No band selector is provided.

The entire frequency range is tuned in
consecutively. The detection mode is set
automatically according to the frequency range to
which the tuned frequency belongs.

Selectable detection modes

(Except ICF-PRO70 West Germany and Saudi Arabia

model)

The entire frequency coverage is divided into 2 to
4 ranges depending on the model type, and the
detection modes, FM, NARROW FM, AM WIDE,
AM NARROW and 388 can be selected for each

range.
' $58 = SlnuIfl Slde Bind

Frequency converter supplied tor wider coverage

(lCF-Pttoso only)

By attaching the supplied FRQ«80 frequency
converter, 115.15-223 MHz can also be received.

[LERSATILE TUNING MODES

T]

Direct tuning (Page at
by inputting a frequency to be tuned in

-wnen you know the frequency at the station

Memory tuning (Page 7)
by simply pressing one button to tune in the stored
station

' For daily listening to your favorite station

Manual tuning (Page e)
by scanning lrequencies step by step at a determined
interval

- when you no not know the frequency or the station
t To tune in precisely a station located by scan timing
or limited scan tuning precisely

Stall Inning (Page 9)
by automatically scanning the entire frequency
coverage

' When you do not Know [he irequency ol the station

Llrllihd WI" tuning (Page 10)
by automatically scanning the rreouency coverage you
have defined

~When you know "1. frequency range tn which lhe
desired Slallon IS located (e.g. FM Dr MW mdlo
broadcasting range, an SW meter band).

Mlmoly Icon tuning (Page ro)
by automatically scanning the stored tun to 101
stations

'To choose a station from among those stored in a
canain memory plge

Program mmry wart tuning (Page it)
by automatically scanning onh/ the stations you have
programmed among all stored in memory (up to 40
stations) In the order pmgrammod

- To choose a station lrom among those having the
specified conditions (3.9. FM broadcasting stations)

Priority tuning (Page 12)
try tuning in the specified elation every 3 seconds

- To catch a radio communication when you are not

lure when it will take place.

LCONVENIENT FUNCTIONS

Memory of up to to nation: (Pope 7)

Up to 40 stations can be stored on A memory page: (10 stations tor
each page) and tuned in infllnlly.

film mn nude: aeloctabk (Page 9)

Scanning can on stopped at the tint-located station. or be resumed
alter elclt station located has been reamed Ior several mono: or
unlit the signal or lho station stops.

Memory Much (Fade 7i

The frequencies of the stations stored on one page are displayed in
sequence while your deaimd Italian I: kept tuned in.

Program memory mmtt (Page 11

The ireouertctas oi the stations programmed are displayed in sequence
while your desired station is kept tuned in.

Memory protection (Page 7»

The memory or on. page (it) stations stored) is locked so that it
cannot be changed Inadvertently.

Kay protection (Pads 8)

The buttons on the front panel are locked so that they cannot be
operated by accident.

Smntotl control (599 91

The receivable signal level can be adjusted so lhat scanning stone at
stations with stronger signals only and noise is suppressed whllo
tuning and while no ataliorr signal is present.

Fitll lunln' (Page 131

AM (Lw. MW and SW) and SSH stations can be tuned in precisely.

-2-

TABLE OF CONTENTS

Section Title Page
Specifications ...................... 1
Features .......................... 2
1. GENE RAL-
Notes on Model Types and Receivable
Frequencies ........................ 3
To Change the MW Tuning Interval ........ 3
To Erase All Memory ................. 3
Location and Function of Controls ........ 4
Direct Tuning ...................... 6
Memory Tuning ..................... 7
Manual Tuning ...................... 8
Scan Tuning 9
Limited Scan Tuning .................. 10
Memory Scan Tuning ................. 10
Program Memory Scan Tuning ........... 1]
Priority Tuning . .................... 12
To Select the Detection Mode ............ 12
Fine Tuning ........................ 13
To Convert the Frequency Coverage
(ICF~PR080 only) ................... 14
2. ELECTRICAL ADJUSTMENTS
Reference-Frequency Oscillator (72 MHz)
Adjustment ................... . . . . . 16
VCOl PD-Voltage Adjustment ........... l7
FM-L Tracking Adjustment . . . . . . l7
VCOZ PD-Voltage Adjustment ........... 18
FM-H Tracking Adjustment ....... . ..... 18
FM IF Adjustment ................... 19
Second Local Oscillator Adjustment ........ 19
AM Ist and 2nd IF Adjustment . . . . . . . 20
NARROW-FM Detector Adjustment ....... 20
AM AGC Adjustment ................. 21
3. DIAGRAMS
IC Block Diagrams ................... 21
Semiconductor Lead Layouts ............ 22
3-1. Signal, PLL Section

Printed Wiring Boards ............. 23
3-2. Schematic Diagram ....... . . . 27
3-3. Converter Board Schematic Diagram 30
3-4. Control Section Printed Wiring Boards . . 30
4. EXPLODED VIEWS .............. 33
5. ELECTRICAL PARTS LIST ........ 36