Hitachi HTDG 2 Service Manual

Page 1

TY No. 317 EGF
32.0

HTD-G2

© HITACHI

SERVICE MANUAL

CONTENTS

SPECIFICATIONS .
FEATURES .......
DISASSEMBLY
ADJUSTMENT.
LUBRICATION .
PRINTED WIRING BOARD
CIRCUIT DIAGRAM.
BLOCK DIAGRAM.
WIRING DIAGRAM
EXPLODED VIEW
REPLACEMENT PARTS LIST
FRONT AND REAR PANEL .....

SAFETY PRECAUTIONS

The followmg precautions should be observed when sen/icing,

1. Since many parts in the unit have special safety related characteristics, always use genuine Hitachis reolacement
parts. Especially critical parts in the power circuit block should not be replaced with other makers.
Critical parts are marked with A In the schematic diagram and Circuit board diagram.

2. Before returning a repaired unit to the customer, the service techniCIan must thoroughly test the unit to ascertain that
it is completely safe to operate without danger of electrical shock.

SPECIFICATIONS
GENERAL SPECIFICATIONS LW SECTION (for swltzerland, Sweden, U.K.. Australia k W. Germany)
Power supply AC lZOV [60 Hzl Frequency range: 155 to 353 kHz (9 kHz Sea)

Power consumption
Dimensions:
Weight,

FM SECTION
Frequency range'
Sensuivny,

lmage interference ratio.
lF interference ratio:

Total harmonic distortion

Signal-IOVDOISE ratlo'
Seleclivny
AM suporession ratio.

AM (MW) SECTION

Frequency range

SensitiVity,
Selectivny
Signal tornoise ratio:

~ 100 , 120V/200 - 240v (50/60 Hz;
,. 220 (50 Hz). ~ 240v [50 Hz)

40w

320(Wlx 137 (Hix276 (0) mm

s 2 kg

87.510 108 MHZ l0.05 MHz step)
19 AN (lHF and [NM

47 dB

95 dB

MONO. 0.1%, STEREO 02%
MONO 70 dB. STEREO. 66 dB
50 d8

50 dB

622 to ieii kHz l9 kHz step)
530i01620 kHz (10 kHz stepl
15W

30 dB

52 dBlat 50 mv/mi

Sensitivny
Signalmnmse ratie

TAPE DECK SECTION

Frequency response

Signal-to~noise ratio

Wow and Flutter,

PREAMP SECTION

Input sensmwty/impedance,

Output level/impedance.
Equalizer
Signalrtornoise raIlO.

BASS CONTROL:
Loudness control.

100 [AV
48 dB

NORMAL 20 to lEi,OOCHz
002: 20 to 16,000 Hz
METAL. 20 to 17,000 Hi
DOLBY NR OFF: 58 dB
DOLBY B NF ON 66 dB
DOLEY C NH ON: 71 dB
004%(WRMS)

DAD/AUX: l7O mV/28 ohms
PHONO' 26 mV/47 kelns

MIC 0.8 rnV/4 kohms

130 mV/3 kohms

PHONO. RIAA :0.5 dB
DAD/AUX 97 dB (lHFAqeerOVK)
PHONO. 80 dB llHF A nrworkl
MlC 59 dB (lHF A netvwki
:EdallOO HZ), :8dBlO kHz)
+65 dB (100 Hz), +4 dBilO KHZl

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.

STEREO TUNER DECK

May 1982 TOYOKAWA WORKS

32,0