Hitachi FT-4000 Serviceanleitung

@HITACHI
SERVICE MANUAL
SPECIFICATIONS
Circuitry
Semi-conductors
• FM SECTION
freauency range
Usable sensitNJtv
50 dB Quieting sensito."tv 'IHF'
Stgnabto.no.se ratio
Signal-to-notse
Harmomc d:stort'on (tHF;
100
6 kHz
Frequency response
Capture ratio
Alternate channel selectivity
'mage rejection i98 MH?)
IF reject.on (98 MHZ)
Spurious relecton (98 MHz)
AM suppression ratio '65 dB"
Stereo separation t 1 kHz'
Sub-carrier suppressaon
Antenna input 'rnpedance
SCA rejection
Muting threshold
FEATURES
1. Dual Gate MOSFET for High Quality
2. Selectivity and Low Distortion
Ceramic Filters
3. Quadrature Detection
4. Phase-Locked Loop for FM/MPX Circuit
AM/FM
FT-4000
AM/FM 2-band stereo tuner
FT. 4000
FT. 4000 L MW/LW/FM 3band stereo tuner
2 'cs, 8 transistors (1 FETL
19 diodes LED) (FT .1000)
21 diodes (1 LED) (FT-40001-)
88- 108 MHz
Mono: 102 dBf .8gvj
12 pv (DIN'
Moro: 17 2 dBf (4
T. 4000)
Stereo 37.2 dBf
4000)
Mono 75 dB, Stereov 68 dB
68 dB. Stereo: 6/1 dB
Moro: 020 .. 0.3%
Moro: O. Stereo 0.25%
Mono: 0 Stereo, 0 450/0
30 H? - 12 kHz
12 dB
75 dB
(2300 kHz) 60 dB
bo dB
80 dB
80 dB
50 dB
46 dB
.46 dB
300 ohms balanced type.
75 ohms unba;anced type
60 dB (FT-4000)
FM Tuner
IF Amplifier using
STEREO
May
English
Deutsch
Frangais
AM SECTION
Frequency range
Usable sensitivity (SIN 20 dB)
Selectivity
Signal-to-noise ratio
Image rejection
IF rejection
Spurious rejection
Harmonic distortion(FT.4000)
LW SECTION (FT. 40001-)
•
Frequency range
Usable sensitivity (S/N 20 dB) 800 "Vim (Ferrite antenna)
Image rejection
IF relection
Selectivity
Signal-to-noise ratio
-1.5dB)
AUDIO SECTION
Output 'evel/impedance
FT.4000 AM (30%mod. fixed) : {135 mV/4.8 kohms'
FT-4000L
GENERAL
•
Power FT -4000 AC 120 V 60 Hz. &220 V 50/60 Hz.
FT.4000L
Power consumption
FT4000
Dimensions
FT.4000L
Weight
Specifications and designs mavbe changed without notice for improvement
FM Mode/Muting Circuit
5.
6. MPX Noise Filter Circuit
and 3
7. A Ceramic Filter, IC in AM (MW/LW) Tuner (FT.4000L)
A Ceramic Filter. IC in AM Tuner (FT •4000)
7.
TWO Extra-Wide Meters and a
8.
1979
FT -4000
FT-4000L
No. 169
530 — 1 ,605 kHz
12 AV' (IHFY. 300 gV/m (Ferrite antenna)
35 dB
53 dB (input. 50 mV/m)
50 dB (at 1.000
38 dB (at 1.000
50 dB (at 1.000 kHZ)
0.8% (input. 5 mVim. 30% mod.)
150 kHz —350 kH7
35 dB
38 dB
38 dB
35 dB (input 5 rnV/m)
FM (100% dev. fixed) _ (550 mV/4.8
MW (30% mod. fixed): (135 mV/4.8
LW (30% mod. fixed): (130 mV/4.8
—240 V 50/60 Hz
—110-120 V/220—240 V 50/60
—220 V 50/60 —240 V 50/60
IOW
435 (W) x 110 x 272 mm
435 (W) x 110 (H) x 288 (D) mm
3.5 kg (77
Fly-wheel Tuning knob
TUNER
FT-4000L
kohms;
kohms}
kohms)
Hz
Hz