Sony TC-D705 - Table of Contents

TC-D705
SAFETY CHECK-OUT (US Model) TABLE OF CONTENTS
After correcting the original service proolem, SECTION 1. GENERAL: © © © ee ee tee te es
perform
the
followne
sdteny
check
before
releasing
SECTION
2.
DISASSEMBLY.
--
=
=
Sigs
.aeupes
a
eee. erate eteas SECTION 3, MECHANICAL ADJUSTMENTS - + - = - -
Check the antenna terminals, metal trim, ‘“‘metallized SECTION 4. ELECTRICAL ADJUSTMENTS - +--+ + =>
knobs, screws, and all other exposed metal parts for
SECTION 5. DIAGRAMS
AC leakage. Check leakage as described below.
LEAKAGE TEST
The AC leakage from any exposed metal part to
earth ground and from all exposed metal parts to any
exposed metal part having a return to chassis, must
not exceed 0.5 mA (500 microampers). Leakage
current can be measured by any one of three
methods.
1. A commercial leakage tester, such as the
Simpson 229 or RCA WT-540A. Follow the
manufacturers’ instructions to use these instru-
ments.
2. A battery-operated AC milliammeter. The Data
Precision 245 digital multimeter is suitable for
this job.
3. Measuring the voltage drop across a resistor by
means of a VOM or battery-operated AC volt-
meter. The “limit”? indication is 0.75 V, so
analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa
SH-63Trd are examples of a passive VOM that
is suitable. Nearly all battery operated digital
multimeters that have a 2 V AC range are
suitable. (See Fig. A)
To Exposed Metal
Parts on Set
AC
voltmeter
(0.75 V)
= Earth Ground
Using an AC voltmeter to check AC leakage.
5-1. Printed Wiring Boards
—Main Section— «= * © 8 = #© 8 © © © # eo
5-2. Schematic Diagram
—Main Section— = * "= = * © 8 © © © # © we
5-3, Circuit Boards Locations » ++ * +s >
5-4, Printed Wiring Board
—Panel Section— «= *" * * * * # © # # «© «
5-5. Schematic Diagram
— Panel Section— Pr |
SECTION 6. EXPLODED VIEWS
6-1. Chassis Sections ** +: = see ee
6-2. Front Panel Sections = ***: + = 8
6-3. Mechanism Section 1: «* s+ + vee
6-4. Mechanism Section 2* "°° soos
SECTION 7. ELECTRICAL PARTS LIST: +--+ += > .
SAFETY-RELATED COMPONENT WARNINGI!
COMPONENTS IDENTIFIED BY MARK A OR DOTTED
LINE WITH MARK AN ON THE SCHEMATIC DIAGRAMS
AND IN THE PARTS LIST ARE CRITICAL TO SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY,