CMT-BT60, CMT-BT60B, CMT-BT80W, CMT-BT80WB - Sony Audio Service Manual (repair manual). Page 4

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)

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.

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.

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, 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).

NOTE  OF  REPLACING  THE  IC481,  IC501,  IC502,  IC504,  
IC702,  IC841,  IC851,  IC902,  IC903  AND  IC904  ON  THE  
MAIN  BOARD
IC481, IC501, IC502, IC504, IC702, IC841, 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  CN5003,  IC5003  AND  
IC5008  ON  THE  JACK  BOARD
CN5003, IC5003 and IC5008 on the JACK board cannot exchange 
with single. When these parts are damaged, exchange the complete 
mounted board.

TEST  DISCS
Use following TEST DISC (for CD) when this unit confi rms the 
operation and checks it.

Part No.

   

Description

3-702-101-01 DISC 

(YEDS-18), 

TEST

4-225-203-01 DISC 

(PATD-012), 

TEST

J-2501-307-A DISC 

(HLX-A1), 

TEST

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 [

?/1

] button to turn the power on.

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.

CMT-BT60

US, Canadian

z

–

AEP

z

–

110 – 240V AC 
area in E

z

z

Australian

z

–

Chinese

z

z

Russian

z

z

Mexican

z

–

Brazilian

–

z

Singapore

z

z

Taiwan

–

z

Korean

z

–

Indian

z

z

CMT-BT60B

AEP

z

–

UK

z

–

Australian

z

–

CMT-BT80W

AEP

–

z

Singapore

z

z

Thai

z

z

CMT-BT80WB

AEP

–

z

UK

–

z