Servicing Notes - Sony CMT-BT60 Service Manual

CMT-BT60/BT60B/BT80W/BT80WB
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.
NOTE OF REPLACING THE TUNER BOARD
When the TUNER board is defective, exchange the complete
mounted board.
NOTE OF REPLACING THE DAB BOARD
When the DAB board is defective, exchange the complete mount-
ed board.
NOTE OF REPLACING THE KEY-L BOARD
When the KEY-L board is defective, exchange the complete
mounted board.
NOTE OF REPLACING THE KEY-R BOARD
When the KEY-R board is defective, exchange the complete
mounted board.
NOTE OF REPLACING THE MS-091 BOARD
When the MS-091 board is defective, exchange the LOADING
ASSY (Ref. No. CDM1).
4
SECTION 1

SERVICING NOTES

NOTE OF REPLACING THE IC481, IC502, IC851,
IC902, IC903 AND IC904 ON THE MAIN BOARD
IC481, IC502, IC851, IC902, IC903 and IC904 on the MAIN
board cannot exchange with single. When these parts are damaged,
exchange the complete mounted board.
NOTE OF REPLACING THE CN5002, IC5003 AND
IC5008 ON THE JACK BOARD
CN5002, IC5003 and IC5008 on the JACK board cannot exchange
with single. When these parts are damaged, exchange the complete
mounted board.
CHECKING THE OPERATION AFTER REPAIR
After repair completion, connect the "iPod" etc. corresponding to
this unit, and check the operation of playback, charge, etc.
TEST DISCS
Use following TEST DISC when this unit confi rms the operation
and checks it.
Part No.
3-702-101-01
4-225-203-01
RELEASING THE DISC SLOT LOCK
The disc slot lock function for the antitheft of sample disc in the
shop is equipped.
Releasing Procedure:
1. Press the [
2. Press the [FUNCTION] button to turn the CD function.
3. Press two buttons of the [x] and [Z] simultaneously for fi ve
seconds.
4. The message "UNLOCKED" is displayed on the liquid crystal
display and the disc slot is unlocked.
Note: When "LOCKED" is displayed, the disc slot lock is not released by
turning power on/off with the [ ?/1 ] button.
COLOR VARIATION
Model
CMT-BT60
CMT-BT60B
CMT-BT80W
CMT-BT80WB
Description
DISC (YEDS-18), TEST (for CD)
DISC (PATD-012), TEST (for CD)
] button to turn the power on.
?/1
Destination
(B) Black
US, Canadian
z
AEP
z
AEP
z
UK
z
AEP
AEP
UK
Color
(W) White
–
–
–
–
–
z
–
z
–
z