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HITACHI
SERVICE MANUAL
FT-4000
SPECIFICATIONS
Circuitry
FT-4000
AM/FM 2-band stereo tuner
FT-4000L
MW/LW/FM
3-band stereo tuner
2 ICs, 8 transistors (1 FET},
19 diodes (1 LED) (FT-4000)
21 diodes (1 LED) (FT-4000L)
Semi-conductors
@ FM SECTION
Frequency range
88 — 108 MHz
Usable sensitivity
Mono:
10.3 dBf (1.8 uV) (IHF),
1.2 uV (DIN)
50 dB Quieting sensitivity HE)
Mono:
17.2 dBf (4 uV)
{FT-4000)
Stereo: 37.2 dBf (39.8 nV)
Signal-to-noise ratio
(FT-4000)
Mono:
75 dB, Stereo:
68 d8
Signal-to-noise ratio(DIN}(FT-4000L)Mono: 68 dB, Stereo: 64 dB
Harmonic distortion (|HF}
100 Hz
Mono: 0.2".,, Stereo:
0.3%
1 kHz
Mono:
0.1%, Stereo: 0.25%
6 kHz
Mono: 0.3%, Stereo: 0.45%
Frequency response
Capture ratio
Alternate channel selectivity (JHF)
(+300 kHz)
1.2 dB
75 dB (FT-4000)
:
60 dB (FT-4000L)
Image rejection (98 MHz)
50 dB
IF rejection (98 MHz)
80 dB
Spurious rejection (98 MHz}
80 dB
e
AM suppression ratio (65 dBf}
50 dB
Stereo separation (1 kHz)
46 dB
Sub-carrier suppression
46 dB
Antenna
input impedance
300 ohms balanced type,
75 ohms unbalanced type
60 dB (FT-4000)
5 pV
SCA rejection
Muting threshold
30 Hz — 12 kHz (+0.5 dB,-1.5 dB) @
FT
- 4000
English
Deutsch
Frangais
No. 169
FT-4000L
@ AM SECTION
Frequency range
530 — 1,605 kHz
Usable sensitivity (S/N 20 dB) 12 nV (IHF}, 300 uV/m (Ferrite antenna)
Selectivity
35 dB
Signal-to-noise ratio
53 dB (input:
50 mV/m)
Image rejection
50 dB (at 1,000 kHz}
{F rejection
38 dB (at 1,000 kHz)
Spurious rejection
50 dB (at 1,000 kHz)
Harmonic distortion(FT-4000)
0.8% (input: 5 mV/m, 30% mod.)
@ LW SECTION (FT-4000L)
Frequency range
150 kHz — 350 kHz
Usable
sensitivity (S/N 20 dB) 800 pV/m (Ferrite antenna)
Image rejection
35 dB
IF rejection
38 dB
Selectivity
38 dB
Signal-to-noise ratio
35 dB (input 5 mV/m}
AUDIO SECTION .
Output level/impedance
FM (100% dev. fixed): (550 mV/4.8 kohms)
FT¥-4000 am (30% mod. fixed) : (135 mV/4.8 kohms)
MW (30% mod. fixed}: (135 mV/4.8 kohms)
FT-A000L | wy (30% mod. fixed): (130 mV/4.8 kohms}
GENERAL
Power requiremenis
FT-4000
AC 120 V 60 Hz, ~220 V 50/60 Hz,
~240 V 50/60 Hz
~110—120 V/220—240 V 50/60 Hz
~ 220 V 50/60 Hz, ~ 240 V 50/69 Hz
10W
FT-4000 435 (W) x 110 (H) x 272 (D) mm
FT-4000L 435 (W) x 110 (H) x 288 (D) mm
3.5 kg (7.7 Ibs.)
FT-4000L
Power consumption
Dimensions
Weight
Specifications and designs may be changed without notice for improvement
FEATURES
1. Dual Gate Mos FET for High Quality FM Tuner
2. High
Selectivity
and
Low
Distortion
IF Amplifier
Using
IC and 3
Ceramic Filters
3. Quadrature Detection
4. Phase-Locked Loop for FM/MPX Circuit
. FM Mode/Muting Circuit
MPX Noise Filter Circuit
. A Ceramic Filter, IC in AM (MW/LW) Tuner (FT-4000L)
. A Ceramic Filter, [C in AM Tuner (FT-4000)
. Two Extra-Wide Meters and a Large-sized Fly-wheel Tuning knob
Onna
AM/FM
STEREO
TUNER
May
1979
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