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Extracted text from sony hcd rx 33 service manual (Ocr-read)
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CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous
radiation exposure.
Notes on chip component replacement
¥ Never reuse a disconnected chip component.
¥ Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Flexible Circuit Board Repairing
¥ Keep the temperature of soldering iron around 270ûC
during repairing.
¥ Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
¥ Be careful not to apply force on the conductor when soldering
or unsoldering. Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
This appliance is classified as
a CLASS 1 LASER product.
The CLASS 1 LASER
PRODUCT MARKING is
located on the rear exterior.
This caution
label is located
inside the unit.
SERVICING NOTE
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK
OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic
break-down because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to be focused on
the disc reflective surface by the objective lens in the optical pick-
up block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH
MARK ! 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
PUBLISHED BY SONY. Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range 87.5 Ð 108.0 MHz
Antenna FM lead antenna
Antenna terminal 75 W unbalanced
Intermediate frequency 10.7MHz
AM tuner section
Tuning range
European, Australian and South African models:
531 Ð 1,602 kHz
Other models: 530 Ð 1,710 kHz
Antenna AM loop antenna
Antenna terminals External antenna terminal
Intermediate frequency 450 kHz
General
Power requirements
Mexican model: 120 V AC, 50/60 Hz
Australian and South African models:
220 Ð 240 V AC, 50/60 Hz
Other models: 120V AC, 60Hz
Power consumption 80 W
Dimensions (w/h/d) incl. projecting parts and controls
Approx. 280 ´ 320 ´ 371 mm
(11
1/8 ´ 12 5/8 ´ 14 5/8 in)
Mass Approx. 7.2 kg (15 lb 14 oz.)
Supplied accessories: AM loop antenna (1)
Remote RM-SG5 (1)
FM lead antenna (1)
Design and specifications are subject to chang e without notice.
ATTENTION AU COMPOSANT AYANT RAPPORT
Ë LA SƒCURITƒ!
LES COMPOSANTS IDENTIFƒS PAR UNE MARQUE ! SUR LES
DIAGRAMMES SCHƒMATIQUES ET LA LISTE DES PIéCES SONT
CRITIQUES POUR LA SƒCURITƒ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIéSES SONY
DONT LES NUMƒROS SONT DONNƒS DANS CE MANUEL OU
DANS LES SUPPƒMENTS PUBLIƒS PAR SONY.
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SAFETY CHECK-OUT
After correcting the original service problem, perform the following
safety checks before releasing the set to the customer:
Check the antenna terminals, metal trim, ÒmetallizedÓ knobs, screws,
and all other exposed metal parts for AC leakage. Check leakage as
described below.
LEAKAGE
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 manufacturersÕ instructions to use these
instruments.
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 voltmeter. The ÒlimitÓ 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 2V AC range are suitable. (See
Fig. A)
To Exposed Metal
Parts on Set
0.15
µF
1.5 k ½
AC
Voltmeter
(0.75 V)
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
TABLE OF CONTENTS
1. GENERAL
.......................................................................... 4
2. DISASSEMBLY
2-1. CD Door ............................................................................. 5
2-2. CD Mechanism Deck ......................................................... 5
2-3. Front Panel ......................................................................... 6
2-4. Main Board and H.P Board ................................................ 6
2-5. CD Tray .............................................................................. 7
2-6. CD Decoder Board ............................................................. 7
2-7. Base Unit ............................................................................ 8
2-8. Cassette Lid (L)/(R) ............................................................ 8
3. MECHANICAL ADJUSTMENTS ............................... 9
4. ELECTRICAL ADJUSTMENTS ................................. 9
5. DIAGRAMS
5-1. Circuit Boards Location ................................................... 14
5-2. Brock Diagrams
¥ Deck Section ................................................................... 15
¥ Tuner/CD Section ............................................................ 17
5-3. IC Brock Diagrams ........................................................... 19
5-4. Schematic Diagram ÑMain Section Ñ ........................... 24
5-5. Printed Wiring Board Ñ Main Section Ñ ....................... 29
5-6. Printed Wiring Board ÑCD Section Ñ ........................... 34
5-7. Schematic Diagram ÑCD Section Ñ .............................. 39
5-8. Schematic Diagram Ñ Panel Section Ñ ......................... 43
5-9. Printed Wiring Board ÑPanel Section Ñ ........................ 47
5-10. IC Pin Function ................................................................ 52
6. EXPLODED VIEWS
6-1. Cabinet Section ................................................................. 54
6-2. Front Panel Section .......................................................... 55
6-3. Cassette Button Section .................................................... 56
6-4. Cassette Mechanism Deck Section ................................... 57
6-5. CD Mechanism Deck Section 1 ....................................... 58
6-6. CD Mechanism Deck Section 2 ....................................... 59
6-7. Base Unit Section (KSM-213BCM) ................................. 60
7. ELECTRICAL PARTS LIST ........................................ 61