Hitachi KH 434 H Service Manual

Page 1

@ HITACHI

SERVICE MANUAL

No. 1256

SPECIFICATIONS

GENERAL
Semi-conductors :

Power Supply :

Power Consumption :

Transistors : 9

Diodes : B

Varistors : 2

AC 120V. 60 H1

DC : 6V (AA' CellX4 or equiv.)
3W

KH-434H, H (C)

English

DIAL CORD STRINGING

DIAL POINTER
(At minimum Irequency)

PULLEY
(Turn the pulley IuIIy
counterclockwise.

Speaker: 6.6cm 3 ohms
Power Output : 240mW (T.H.D. 10%) SPRING
Dimensions : 19.0(H)X18.0(W)X5.3(D)cm
W ' M: 6409
g ADJUSTMENT
RADIO - Dummy antenna (aerial)
Circuit System 2 FM/AM 2-band superheterodyne
KEY To ILLUSTRATION Tuning Range: FM : 88 to 108 MHz FM - 759
AM : 530 to 1605 kHz
® ON-OFF SWITCH 5: ('9 AC SOCKET Antenna : FM : Telescopic antenna Rg
AM : Built-in ferrite-core antenna (75--)9
VOLUME CONTROL ® EARPHONE JACK Intermediate Frequency: FM 2 10.7 MHz R89 2
® TUNING CONTROL @ BAND SELECTOR AM i 55 H1
Sensitivity : FM : 10 dB (man) 13 dB (pra.)
@ TELESCOPIC ANTENNA AM ; 40 dB (max.) 49 dB (pra.) Rg : SGs output impedance
DISASSEMBLY FM-IF adiustment
1. Rear cover 2. PC board Connection :
TP1 Genescope
33m 0.01,;
. I
um. ------ M - - fir ----- - j;
= __________ 4 '= _ Jr-' - - =0
IN OUT
0.01,}
TF'2
Adjustment :
D u - .
Gonescope 35:73:! r Ad" 9""! Remarks
T5 - Turn T5 fully counterclockwise.
T1 Maximum
T2 1) Reduce the level of the genescope to make one
T3 A waveform.
10.7 MHz Highest T4 fc
A Adjust T5 for a symmetrical sinewave (5 curve)
T5 output. 1
FM AM 2 BAND PORTABLE RADIO T4 VA AdmTm'asmigmmem5m
- _

Sept. 197 9