Sony HCD-GTX999 Service Manual page 3

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NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostat-
ic 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
about 350 °C.
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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
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.
?/1
2. Press the [FUNCTION] button to select CD function.
3. While pressing the [
seconds).
4. The message "UNLOCKED" is displayed and the disc tray is
unlocked.
"
Note: When LOCKED
turning power on/off with the
NOTE THE HANDLING OF HDD
1. Note The Transported
Do not give set the high impact when you transport this set. HDD
might be damaged by the impact.
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2. Note The Repairing
Do not move the set for state power on, and for at least 30 seconds
after the set is power off. HDD might be damaged by the impact.
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SERVICING NOTES
] button, press the [ ] button for more 5
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is displayed, the slot lock is not released by
[ ]
button.
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SECTION 1
2 9
8
NOTE THE IC5 AND IC13 ON THE USB MICOM
BOARD REPLACING
IC5 and IC13 on the USB MICOM board cannot exchange with
single. When these parts on the USB MICOM board are damaged,
exchange the entire mounted board.
NOTE THE DISASSEMBLY OF USB CONNECTOR
BOARD
USB CONNECTOR board and HDD LED (A)/(B) board connec-
tion part are damaged easily. Note the printed pattern may peel,
remove carefully.
NOTE THE IC202 ON THE MAIN BOARD
REPLACING
Excecute the following procedures immediately after the IC202 on
the MAIN board is exchanged, and the cold reset is executed.
Procedure:
1. Press the [
?/1
2. Press the [TUNER/BAND] button to select TUNER (FM)
function.
3. Press the [TUNING MODE] button on the remote commander
to preset menu displayed.
4. Press the [M]/[m] buttons to select "FM2 88.00 MHz".
5. Press the [TUNER MEMORY] button on the remote com-
mander.
6. Press the [M]/[m] buttons to select "FM9".
7. Press the [ENTER] button to preset memory.
Note: Do not disconnect the AC plug while this operation.
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MODEL IDENTIFICATION
3 6 7 1 3 1 5
– Rear View –
120V AC area in E model,
Chilean and Peruvian models
Mexican model
Argentina model
Brazilian model
co
.
HCD-GTX999
9 4 2 8
] button to turn the power on.
0 5 8 2 9 9 4 2 8
Model
3-294-738-0[]
3-294-738-1[]
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3-294-738-2[]
3-294-738-3[]
Ver. 1.1
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9 9
PART No.
Part No.
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