Servicing Notes - Sony CMT-X5CD Service Manual

CMT-X5CD/X5CDB/X7CD/X7CDB
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
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.
• Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.
CHECKING THE OPERATION AFTER REPAIR
After repair completion, connect the "iPod" etc. corresponding to
this unit, and check the operation of playback, charge, etc.
NOTE OF REPLACING THE TUNER BOARD
When the TUNER board is defective, replace the complete mount-
ed board.
NOTE OF REPLACING THE DAB BOARD
When the DAB board is defective, replace the complete mounted
board.
NOTE OF REPLACING THE ANTENNA BOARD
When the ANTENNA board is defective, replace the WIFI AN-
TENNA 2.4 GHz SVX (Ref No. ANT1).
NOTE OF REPLACING THE TOUCH KEY BOARD
When the TOUCH KEY board is defective, replace the REAR
SVX PANEL (Ref No. RP1).
NOTE OF REPLACING THE POWER KEY BOARD
When the POWER KEY board is defective, replace the REAR
SVX PANEL (Ref No. RP1).
4
SECTION 1

SERVICING NOTES

NOTE OF REPLACING THE MS-091 BOARD
When the MS-091 board is defective, replace the LOADING
ASSY (Ref. No. CDM1).
NOTE OF REPLACING THE IC202, IC203, IC502, IC602,
IC851 AND IC907 ON THE MAIN BOARD
IC202, IC203, IC502, IC602, IC851 and IC907 on the MAIN
board cannot replace with single. When these parts are damaged,
replace the complete mounted board.
NOTE OF REPLACING THE CN1505 ON THE JACK-
NET BOARD
CN1505 on the JACK-NET board cannot replace with single.
When this part is damaged, replace the complete mounted board.
TEST DISCS
Use following TEST DISC (for CD) when this unit confi rms the
operation and checks it.
Part No.
3-702-101-01
4-225-203-01
J-2501-307-A
CAPACITOR ELECTRICAL DISCHARGE PROCESSING
When checking the board, the electrical discharge is necessary for
the electric shock prevention.
Connect the resistor to both ends of respective capacitors.
• Power unit (Ref. No. PWR1)
C114, C201, C202
Description
DISC (YEDS-18), TEST
DISC (PATD-012), TEST
DISC (HLX-A1), TEST
– POWER UNIT (Conductor Side) –
800 /2 W
(for C202)
800 /2 W
(for C114)
800 /2 W
(for C201)