Onkyo PCS 207 Service Manual

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ONKYO® SERVICE MANUAL

PERSONAL COMPONENT SYSTEM
PCS-207

U 120 AC, 60Hz

SAFETY-RELATED COMPONENT WARNINGII
COMPONENTS IDENTIFIED BY MARK A ON THE
SCHEMATIC DIAGRAM AND IN THE PARTS LIST ARE
CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK.
REPLACE THESE COMPONENTS WITH ONKYO PARTS
WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS
MANUAL.

MAKE LEAKAGE-CURRENT OR RESISTANCE MEA-
SUREMENTS TO DETERMINE THAT EXPOSED PARTS
ARE ACCEPTABLY INSULATED FROM THE SUPPLY
CIRCUIT BEFORE RETURNING THE APPLIANCE TO
THE CUSTOMER

rONKYO®
Mllllll BflMPflNENIS

REF. NO 3522

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SERVICE PROCEDURES

l.Safety-check out
After correcting the original service problem, perform the
following safety check before releasing the set to the
customer:
Connect the insulating-resistance tester between the plug
of power supply cord and chassis.
Specifications : More than 10 Mohm at 500V.

2. Replacing the fuses
For continued protection against fire hazard, replace only with
same type and same rating fuse.

Circuit No. Part No. Description
F I 53 1200000 2A/250V
F2 531350001-BU 3.5A/125V
F3 531350001»BU 3.5A/125V
F4 531200000 2A/250V
F5 531100000 lA/ZSOV
F6 53] 100000 1A/250V

CAUTION ON REPLACEMENT OF OPTICAL PICKUP

The laser diode in the optical pickup block is so sensitive to
static electricity, surge current and etc, that the components
are liable to be broken down or its reliability remarkably
deteriorated.

PRECAUTIONS

During repaincarefully take the following precautions. (The

following precautions are included in the service parts.)

1. Ground for the work-desk.
Place a conductive sheet such as a sheet of copper (with
impedance lower than 10Mohm) on the work-desk and
place the set on the conductive sheet so that the chassis,
2. Grounding for the test equipments and tools.
Test equipments and toolings should be grounded in order
that their ground level is the same the ground of the power
source.

3. Grounding for the human body,
Be sure to put on a wrist-strap for grounding whose other
end is grounded.
Be particularly careful when the workers wear synthetic
fiber clothes, or air is dry.

4. Select a soldering iron that permits no leakage and have
the tip of the iron well-grounded.

5. Do not Check the laser diode terminals with the probe of

a Circuit tester or oscilloscope.

PROTECTION OF EYES FROM LASER BEAM DURING SERVICING

This set employs a laser. Therefore, be sure to follow carefully
the instructions below when servicing.

WARINGII
WHEN SERVICING, DO NOT APPROACH THE LASER
EXIT WITH THE EYE TOO CLOSELY. IN CASE IT IS
NECESSARY TO CONFIRM LASER BEAM EMMISION,
BE SURE TO OBSERVE FROM A DISTANCE OF MORE
THAN 30cm FROM THE SURFACE OF THE OBJECTIVE
LENS ON THE OPTICAL PICK-UP BLOCK.

Laser Diode Properties

0 Material:GaAlAs

- Wavelength:760~800nm

U Emission Duration:c0ntinuous

0 Laser output:max. 0,5mW*

* This output is the value measured at a distance about

1.8mm from the objective lens surface on the Optical
Pickup Block.