XAV-68BT - Sony Car Audio Service Manual (repair manual). Page 3

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XAV-68BT
3
SECTION  1
SERVICING  NOTES
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.
Label indication
Destination
Signal format 
system
Region 
code
Part No.
NTSC
1
4-540-917-0[]
US and Canadian 
models
NTSC
4
4-540-918-0[]
E (NTSC) model
PAL
3
4-540-919-0[]
E (PAL) model
PAL
5
4-540-921-0[]
Indian model
PAL
5
4-540-922-0[]
Russian model
PAL
2
4-558-481-0[]
Saudi Arabia model
PAL
4
4-558-482-0[]
Australian model
PAL
2
4-564-299-0[]
AEP and UK 
models
MODEL  IDENTIFICATION
Part No.
Region Code
(US and Canadian models)
– Bottom View –
(US, Canadian, AEP, Russian, UK, 
E (PAL) and Saudi Arabia models)
Region Code
(Russian model)
Region Code
(E (PAL) and 
Saudi Arabia models)
Part No.
Region Code
– Bottom View –
(E (NTSC), Indian and Australian models)
Region Code
(AEP and UK models)
IMPORTANT  NOTE  FOR  REPAIRING
XAV-68BT contain individual information that the customer regis-
tered because it installs the Bluetooth function.
When repairing, the data that the customer registered might disap-
pear. Have the approval of the customer beforehand.
If any of the following repair is performed, that data disappears.
• 
Complete BT board replacing
• Initialize
Note: Replaced old complete BT board is destroyed with the hammer, 
and throw out it.
ABOUT  THE  SECURITY  FUNCTION
This unit does not use security function by password lock.
ABOUT  THE  REPAIRING  OF  BOARD
When each boards installed on this unit are defective, replace the 
parts including the board or complete mounted board.
However, only the following IC can replace with single.
Ref. No. 
Part No. 
Description 
Remark
U308 
9-885-201-53  IC   LM1117-ADJ
– MAIN Board (Top view) –
U308
Under normal conditions, the battery will last 
approximately 1 year. (The service life may be 
shorter, depending on the conditions of use.)
When the battery becomes weak, the range of the 
remote commander becomes shorter. Replace the 
battery with a new CR2025 lithium battery. Use of 
any other battery may present a risk of fire or 
explosion. 
Notes on the lithium battery
Keep the lithium battery out of the reach of children. 
Should the battery be swallowed, immediately 
consult a doctor.
Wipe the battery with a dry cloth to assure a good 
contact.
Be sure to observe the correct polarity when installing 
the battery.
Do not hold the battery with metallic tweezers, 
otherwise a short-circuit may occur.
WARNING
Battery may explode if mistreated.
Do not recharge, disassemble, or dispose of in 
fire.
REPLACING  THE  LITHIUM  BATTERY  OF  THE  REMOTE 
COMMANDER
Ver. 1.3
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