Hitachi HCUR 700 UC Service Manual

Page 1

HITACHI

SERVICE MANUAL
MANUEL D'ENTRETIEN
WARTUNGSHANDBUCH

CAUTION:

Before servicing this chassis, it is important that the service technician read the Safety
Precautions and Product Safety Notices in this service manual.

ATTENTION:

Avant deffectuer Ientretien du chéassis, le technicien doit lire les «Precautions de sécurité»
et les «Notices de sécurité du produit» présentés dans la présent manuel.

VORSICHT:

Vor Offnen des Gehauses hat der Service»Ingenieur die ,,Sicherheitshinweise und ,,Hinweise
zur Produktsicherheit in diesem Wartungshandbuch zu lesen.

_J

I 31.)

43.1: 3 q..

CONTENTS
SPECIFICATIONS ..
SERVICE POINTS.
ADJUSTMENTS & MEASUREMENT
WIRING DIAGRAM ..........................

PRINTED CIRCUIT BOARD ..............................................................................

CIRCUIT DIAGRAM.
BLOCK DIAGRAM....
EXPLODED VIEW .................
REPLACEMENT PARTS LIST

SM0104

HCUR7OOUC
HCUR700E
HCUR7OOEBS
HCUR700W

Data contained within this Service
manual is subject to alteration for
improvement.

Les données fournies dans le présent
manuel dentretien peuvent faire Iobjet
de modifications en vue de perfectionner
le produit.

Die in diesem Wartungshandbuch
enthaltenen Spezifikationen konnen sich
zwecks Verbesserungen andern.

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SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
MINI COMPONENT HI-FI SYSTEM

OCTOBER 2000

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HCU»R700

SAFETY PRECAUTIONS \

The following precautions should be observed when servicing.

1. Since many parts in the unit have special safety-related characteristics, always use genuine Hitachi's replacement
parts. Especially critical parts in the power circuit block should not be replaced with other makers. Critical parts
are marked with .' in the circuit diagram and printed wiring board.

2. Before returning a repaired unit to the customer, the service technician must thoroughly test the unit to ascertain

K that it is completely safe to operate without danger of electrical shock. /

\

f Check that exposed parts are acceptably insulated from
the supply circuit before returning the repaired instrument INSTRUMENT
to the customer.

. Checking method (Exposed part)
Measure the resistance value between the both poles of
attachment cup (Power supply plug) and the exposed \
parts (Parts such as Knob, Cover, etc. where the cus-
tomer is easy to touch.) and check that the resistance 0 0
value is 500 kohms or more.

\ Insulation tester (DC 500V) /