Sony HCD-EX66 / HCD-EX88 / HCD-EX99 / MHC-EX66 / MHC-EX88 / MHC-EX99 Service Manual ▷ View online
HCD-EX66/EX88/EX99
4
SECTION 1
SERVICING NOTES
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
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
• 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.
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
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 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.
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.
also be added to ordinary solder.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
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.
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.
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.
• Abbreviation
AR
AR
: Argentina model
E2
: 120V AC area in E model
E4
: 220 – 240V AC area in E model
E51
: Chilean and Peruvian models
EA
: Saudi Arabia model
MX
: Mexican model
Model
Part No.
EX99: MX model
4-263-771-0[]
EX99: AR model
4-263-772-0[]
EX88: E2, E51 models
4-263-773-0[]
EX88: MX model
4-263-774-0[]
EX88: AR model
4-263-775-0[]
EX66: E4 model
4-263-778-0[]
EX66: EA model
4-263-779-0[]
EX66: E2, E51 models
4-263-780-0[]
EX66: AR model
4-263-782-0[]
EX99: E2, E51 models
*
MODEL IDENTIFICATION
– Model Number Lavel –
– Model Number Lavel –
RELEASING THE DISC TRAY LOCK
The disc tray lock function for the antitheft of an demonstration
disc in the store is equipped.
The disc tray lock function for the antitheft of an demonstration
disc in the store is equipped.
Releasing Procedure:
1. Press [
1. Press [
?/1
] button to turn the power on.
2. Press the [FUNCTION] button to select CD function.
3. While pressing the [
3. While pressing the [
x
] button for more 5 seconds.
4. The message “CHILD LOCK OFF” is displayed and the disc
tray is unlocked.
Note: When “CHILD LOCK ON” is displayed, the slot lock is not re-
leased by turning power on/off with the [?/1] button.
*
: Since the HCD-EX99: E2 and E51 models have their model
number labels marked directly on the back panel, the model
number labels have no relative part numbers.
number labels have no relative part numbers.
Because of this, determine the model through the marked model
number when comparing the difference between these models.
Parts No.
HCD-EX66/EX88/EX99
5
SERVICE POSITION OF CDM76
SERVICE POSITION OF BOARDS
top panel section
BD76 board
stand
AMP SMPS board
PANEL board
tuner unit
(TUNER board)
(TUNER board)
HCD-EX66/EX88/EX99
6
HOW TO OPEN THE TRAY WHEN POWER SWITCH TURN OFF
pin
bracket
Pull the tray by the hand.
CAPACITOR DISCHARGE FOR ELECTRIC SHOCK PREVENTION
AMP SMPS board
In checking the AMP SMPS board, make a capacitor
discharge of C624 (EX66) or C625 (EX88) or C631
(EX99) and C914 for electrical shock prevention.
discharge of C624 (EX66) or C625 (EX88) or C631
(EX99) and C914 for electrical shock prevention.
(Right side view)
AMP SMPS board
C914
C624 (EX66)
C625 (EX88)
C631 (EX99)
C625 (EX88)
C631 (EX99)
800
:/2 W
800
:/2 W
HCD-EX66/EX88/EX99
7
PRECAUTION WHEN INSTALLING A NEW OP UNIT/
PRECAUTION BEFORE UNSOLDERING THE STATIC
ELECTRICITY PREVENTION SOLDER BRIDGE
PRECAUTION BEFORE UNSOLDERING THE STATIC
ELECTRICITY PREVENTION SOLDER BRIDGE
When installing a new OP unit, be sure to connect the fl exible
printed circuit board fi rst of all before removing the static electric-
ity prevention solder bridge by unsoldering.
Remove the static electricity prevention solder bridge by unsolder-
ing after the fl exible printed circuit board has already been con-
nected.
(Do not remove nor unsolder the solder bridge as long as the OP
unit is kept standalone.)
printed circuit board fi rst of all before removing the static electric-
ity prevention solder bridge by unsoldering.
Remove the static electricity prevention solder bridge by unsolder-
ing after the fl exible printed circuit board has already been con-
nected.
(Do not remove nor unsolder the solder bridge as long as the OP
unit is kept standalone.)