Servicing Notes - Sony HCD-EC69i Service Manual

HCD-EC69i/EC79i/EC99i
Ver. 1.1
QQ
3 7 63 1515 0
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electro-
static 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 fl exible 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 refl ective surface by the objective lens in the optical
pickup block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.
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
TE
about 350 °C.
L 13942296513
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 viscous (sticky, less prone to fl ow)
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.
RELEASING THE DISC TRAY LOCK
(EC79i: UK, Australian/EC99i)
The disc tray lock function for the antitheft of an demonstration
disc in the store is equipped.
Releasing Procedure:
1. Press [ / ] button to turn the power on.
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2. Press the [FUNCTION] button to select CD function.
3. While pressing the [ ] button, press the [
x
seconds).
4. The message "UNLOCKED" is displayed and the disc tray is
unlocked.
Note: When "LOCKED" is displayed, the slot lock is not released by turn-
ing power on/off with the [ ? / 1 ] button.
NOTE OF REPLACING THE LOADING BOARD
(EC79i: UK, Australian/EC99i)
When the LOADING board is damaged, exchange the entire www
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SECTION 1

SERVICING NOTES

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MODEL IDENTIFICATION
- Back Panel -
Power
Voltage
Indication
Model
EC69i: US and Canadian model
EC69i: UK model
EC69i: Australian model
EC79i: US and Canadian model
EC79i: UK model
EC79i: Australian model
EC99i: US and Canadian model
EC99i: UK model
EC99i: Australian model
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK (EC69i/EC79i: US, Canadian models)
During normal operation of the equipment, emission of the laser
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diode is prohibited unless the upper lid is closed while turning on
the SW351. (push switch type)
The following checking method for the laser diode is operable.
• Method
Emission of the laser diode is visually checked.
1. Open the upper lid.
2. Push the SW351 as shown in Fig.1.
Note: Do not push the detection lever strongly, or it may be bent or
damaged.
3. Check the object lens for confi rming normal emission of the
laser diode. If not emitting, there is a trouble in the automatic
power control circuit or the optical pick-up.
In this operation, the object lens will move up and down 2
times along with inward motion for the focus search.
SW351
co
Fig. 1. Method to push the SW351
.
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Power Voltage Indication
120V - 60Hz 80W
230V - 50/60Hz 80W
230–240V - 50/60Hz 80W
120V - 60Hz 200W
230V - 50/60Hz 200W
230–240V - 50/60Hz 200W
120V - 60Hz 250W
230V - 50/60Hz 250W
230–240V - 50/60Hz 250W
0 5 8 2 9 9 4 2 8
m
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