Servicing Notes - Sony TAV-L1 Service Manual

TAV-L1
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic
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 flexible 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 reflective surface by the objective lens in the optical pick-
up 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!
ERROR CODE FOR LIFT PROTECT
FL Display Protect Kind
LIFT ERR01 FG counter error
LIFT ERROR02 Sensor error
LIFT ERROR03 Motor fault
LIFT ERROR04 Motor overcurrent
LIFT ERROR05 Operation timeout
LIFT ERROR06 Speed error
MAIN-µCOMy
LIFT ERROR10 SUB-µCOM
connection error
6
SECTION 1

SERVICING NOTES

NOTES ON REPLACEMENT OF CSP (CHIP SIZE
PACKAGE) IC
Replacement of EM6A9320BI-5MG (IC5500) on the B board and
used in this set requires a special tool.
NOTE OF REPLACING THE EEPROM (IC103) ON
THE DMB13 BOARD
EEPROM (IC103) on the DMB13 board cannot exchange with
single. When EEPROM (IC103) on the DMB13 board is damaged,
exchange the entire mounted board.
NOTE OF HANDLING THE P BOARD (Part No. A-
1161-924-A)
When the P board is replaced by a repair for a fee, throw away the
P board after obtaining consent of not returning of the P board to
the customer. When throwing away the P board, be sure to throw
away after destroying P board physically with the hammer etc.
ABOUT THE CASE WHERE "DEMO" OR "LOCKED"
IS DISPLAYED ON THE FLUORESCENT INDICATOR
TUBE
The case where "DEMO" or "LOCKED" is displayed on the
fluorescent indicator tube when operating this set, refer to LIFT
DEMO MODE (page 38) (for case where "DEMO" is displayed)
and TRAY LOCK MODE (page 36) (for case where "LOCKED" is
displayed) on the Section 4. TEST MODE.
Detail Information
FG counter by LIFT position
was exceeded standard value
Input from sensor was not
correct
Fault of motor driver was
detected
Overcurrent of motor driver
was detected
Limit timer for each operation
was exceeded limit-timer
FG counter every 500 msec
was exceeded standard value
MAIN-µCOMySUB-µCOM
connection error was detected
So, MAIN-µCOM reset
SUB-µCOM
• Strong viscosity
Unleaded solder is more viscou-s (sticky, less prone to flow)
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.
Majour Cause
DROP DOWN DETECT (PH1242)
DROP UP DETECT (Q1262)
Sensor broken
STOP DOWN DETECT (PH1241)
STOP UP DETECT (Q1261)
DROP DOWN DETECT (PH1242)
DROP UP DETECT (Q1262)
Sensor broken
STOP DOWN DETECT (PH1241)
STOP UP DETECT (Q1261)
Motor driver broken MOTOR DRIVER (IC916)
Motor driver broken
MOTOR DRIVER (IC916)
Restriction of LIFT motion
DROP DOWN DETECT (PH1242)
Restriction of LIFT motion DROP UP DETECT (Q1262)
Sensor broken STOP DOWN DETECT (PH1241)
Motor broken STOP UP DETECT (Q1261)
MOTOR (M901)
Restriction of LIFT motion
MOTOR (M901)
Motor broken
BELT
Belt broken
FG SENSOR (PH1251)
FG sensor broken
SUB-µCOM (IC901)
Hardware
I2C LINE
Checking Target