Hitachi TM 401 A Service Manual

Page 1

I I'M-401A

@ HITACHI

ADJUSTMENT

I Connecting Setting Adjusting
SERVICE MANUAL No. 900 Sequence Signal Source Output Indicator . . . .
(Connect to) (Connect to) Tuning Signal Adjust lndication
1 1. Connect resistor (49, 10W) to speaker terminal,
2 Set knob (VOLUME: MAX, TONE' HIGH)
1 Set core (R4: CENTER)
2 AM-IF AM Sweep gen. Oscilloscope T1 455
2 f max, 455 kHz T2
9 C? m T3
H "' KEY TO ILLUSTRATION
1 T min. 52 5 kHz L4
' Ii POlNTER _
Q 2 {max 1640 kHz 010
; V (2) TONE CONTROL 3 AM-RF - AM Signal gen: v T v M v max.
_ _ C2
. _ 3 POWER SWlTCH/VOLUME CONTROL
i \Ir-) 0 3 400m so?c Mod. ' (Ant trimmer)
: ® TUNING SELECTOR ca
®TUNlNG CONTROL 3, m 1000 kHz
4 AM SENSITIVITY R4 20dB
INTERNAL VIEW
SPECIFICATIONS
r AM dummy am.
Circuit System : Superheterodyne C10 C 6 R1+ S'G__:_D_ef_a[_ci: 809
Tuning Range : 53071605 kHz ' I I 1) : :
Intermediate Frequency : 455 kHz , I ANT: JACK I }
Sensitivity ; 20 dB (max), 26 dB (pm) 3 g
Antenna : Telescopic antenna ' .
Semiconductors ; 2 IC'S 3 Diodes
Power Source : 144 V (Negative ground)
Power Consumption : 210 mA (at No signal)
Speaker : 4 ohm
Maximum Output : 7 W
Dimension : 5.0cm(H) X l6.0cm(W) >< 8.0cm(D)
2(H) >< 6-5/16(W) X 3-1/8*(D) TO SPEAKER
Weight: 900 g TERMlNAL
2 lbs.
RESlSTOR
43?, 10W

CAR RADIO

Nov. 1976