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Extracted text from sony hcd hp 27 service manual (Ocr-read)
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HCD-HPZ7/HPZ9
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE
WITH MARK 0 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.ATTENTION AU COMPOSANT AYANT RAPPORT
Ã- LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0 SUR
LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES
PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE
FONCTIONNEMENT. NE REMPLACER CES COM- POSANTS
QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT
DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS
PUBLIÉS PAR SONY.
CD player section
System Compact disc and digital
audio system
Laser Diode Properties Emission duration:
continuous
Laser Output*:
Less than 44.6µW
*This output is the value measurement at a distance of
200 mm from the objective lens surface on the
Optical Pick-up Block with 7 mm aperture.
Frequency response 20 Hz -“ 20 kHz (±0.5 dB)
Wavelength 780 -“ 790 nm
Tape deck section
Recording system 4-track 2-channel stereo
Frequency response 50 -“ 13,000 Hz (±3 dB),
using Sony TYPE I
cassettes
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range 87.5 -“ 108.0 MHz
Antenna FM lead antenna
Antenna terminals 75 ohms unbalanced
Intermediate frequency 10.7 MHz
AM tuner section
Tuning range
Pan-American model: 530 -“ 1,710 kHz
(with the tuning interval
set at 10 kHz)
531 -“ 1,710 kHz
(with the tuning interval
set at 9 kHz)
European model: 531 -“ 1,602 kHz
(with the tuning interval
set at 9 kHz)
Other models: 530 -“ 1,710 kHz
(with the tuning interval
set at 10 kHz)
531 -“ 1,602 kHz
(with the tuning interval
set at 9 kHz)
Antenna AM loop antenna
Antenna terminals External antenna terminal
Intermediate frequency 450 kHz
General
Power requirements
North American model: 120 V AC, 60 Hz
European model: 230 V AC, 50/60 Hz
Other models: 120 V, 220 V or 230 -“
240 V AC, 50/60 Hz
Adjustable with voltage
selector
Power consumption
HPZ9
North American model: 145 W
Other models: 125 W
HPZ7
North American model: 85 W
European model: 95 W
0.25 W (in Power Saving
Mode)
Other models: 90 W
Dimensions (w/h/d) (excl. speakers)
Approx. 198 × 275 ×
341 mm
Mass (excl. speakers)
Amplifier/Tuner/Tape/CD section:
HPZ9 : 7.7 kg
HPZ7 : 7.3 kg
Design and specifications are subject to change
without notice.
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HCD-HPZ7/HPZ9
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.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
Carry out the S curve check in CD section adjustment and check
that the S curve waveforms is output three times.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT 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 the soldering iron around 270 °C
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.CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation
exposure.
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size)
: LEAD FREE MARK
Unleaded solder has the following characteristics.
-Unleaded solder melts at a temperature about 40 °C higher
than ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350 °C.
Caution: The printed pattern (copper foil) may peel away if
the heated tip is applied for too long, so be careful!
-Strong viscosity
Unleaded solder is more viscou-s (sticky, less prone to flow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
-Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder. 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
exterior.
SAFETY CHECK-OUT
After correcting the original service problem, perform the following
safety check before releasing the set to the customer:
Check the antenna terminals, metal trim, metallized knobs, screws,
and all other exposed metal parts for 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 microamperes.).
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
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 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)
1.5 k -„¦ 0.15 µF AC
voltmete r (0.75 V) To Exposed Metal
Parts on Set
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.