Hitachi FT 3500 Service Manual

Page 1

TY I No. 261 EGF

HITACHI -
FT-3500

SERV CE MANUAL

CONTENTS
SPECIFICATIONS ......... 1
FEATURES ......... ...... ....3
GENERAL ALIGNMENT INSTRUCTION .. 3
FM TUNER ALIGNMENT . .. . 4
AM TUNER ALIGNMENT . 5
BLOCK DIAGRAM...... . .. 7
.....m PRINTED WIRING BOARD . . . . . . . . . . .. . s
CIRCUITDIAGRAM ...... ...9
DIAL CORD SETTING . . ........ ...... .10

SAFETY PRECAUTIONS

The following precautions should be observed when servicmg

DISASSEMBLY AND REPLACEMENT ....10
KEY TO ILLUSTRATIONS ....... ..... .14

i. SInce many parts In the unit have special safety-related characteristics, always use genuine Hitachis replacement parts Especially
crIIIcal parts In the power Circuit block Should not be replaced With other makers
CrItIcai parts are marked WIth A In the schematic dIagram and cum)! board diagram

2. Before returning a repaired unIHo the customer, the service technician must thoroughly test the unIt IO ascertain that it IS comr

pletely safe to operate without danger of electrical shock

SPECIFICATIONS

CIrcuItry
Semiconductors

I FM SECTION
Frequency range
Usable Sensmvitv
Image interference ratIo
IF Interference ratio
Total harmonIc distortion

Signal-tOrnOise ratio

Frequency response

Selectivity

Stereo Separation
Capture ratio

AM suppression ratio
Output voltage

Antenna terminai

AM/FM 2-band Stereo tuner
3 |Cs.i2 transistors (1 PET),
10 diodes (2 LEDs)

88-108MHZ
10.8 dBf (IHF), 1.0uV
lI75 ohms DIN)

50 dB (98 MHZ; IHF and DIN)
80 dB (98 MHz; IHF and DIN)

MONO: 0.1% (1I STEREO 0.25% (IkI-Iz)

MONO: 77dB(lHF),70dB(D|N)

STEREO. 70dB (IHF),
64dB (DIN)

30 Hz 712 kHz (75 Its :gg dB)

For U.S.A. and Canada

30 Hz 712 kHz (50 MS :33 dB)

For Europe. Asia and Latin
America

50 dB (:400 )(Hz, IHF)

50 dB (:300 kHz, DIN)

45 dB (1 kHz, IHF and DIN)
1.0 dB (IHF and DIN B.P.F
1 kHz)

50 dB (II-(F and DIN)

550 rnVI4OOHz,75)<)-Iz
deviation)

300 Ohms balanced and 75 ohms

unbalanced

AM SECTION
Frequency range
Sensitivity

Image interference ratIo
IF interference ratiO
SelectiVity

Signal-tornoise ratio
Output voltage
GENERAL

Power requirements

Power consumptIon
DimenSIons

Weight

5307) ,605 kHz

IEuV (IHF),4UMV (DIN)
400uV/m (IHF Loop antenna)
50 dB IIHF and DIN)

40 dB (IHF and DIN)
34dB(:IOkHZ,|HF).30dB(I9I DIN)

53 dB (II-(F arid DIN)
165mV(4OOHZ.SO% modulation)

ACIZOVGCHZ for U.S.A. and Canada
~IIOr12OV/220-240V EO/BOHZ
for Asia and Latin America

~220- 240V 50/60 Hz for Europe,
and Australia

6 watts

435(W)x83(H)x253(D)mm
(i7-1/8"x3-i/4"x9761/64")

3.4 kg 17.5 lbs)

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.

AM/FM STEREO TUNER

April

1 98 1 TOYOKAWA WORKS