Sharp DV-HR300H Service Manual ▷ View online
13
DV-HR300S/HR350S
DV-HR300H
DV-HR300X
DV-HR300H
DV-HR300X
Shifter
Shifter
Jig (thin board)
(B)
6
5
4
(C)
3
5
2
1
(A)
•
Precautions when replacing the traverse mechanism
1) Do not touch the pickup
1) Do not touch the pickup
1
, guide shaft
2
, spindle motor
3
, thread motor
4
, adjusting screw
5
and follower
6
.
2) Wear an earth band during the replacement.
3) Keep the traverse mechanism away from dust or dirt.
3) Keep the traverse mechanism away from dust or dirt.
Pay special attention to objective lens (A) of pickup
1
, lead screw (B) of thread motor
4
and rubber surface (C) of
spindle motor
3
.
•
Notes when inserting the tray
1) Before inserting the tray, set the shifter to the rightmost position with the unit straight in front. If the shifter is not set
1) Before inserting the tray, set the shifter to the rightmost position with the unit straight in front. If the shifter is not set
properly, malfunction may result or the tray may get stuck inside.
2) The shifter works with the convex part of the (a) section located in the lower part of the unit. (See page 9 of the
service manual.)
•
Removing the tray
1) Pull out the tray to the end of the stroke.
2) Insert the jigs from left and right sides of the tray at the same time.
3) Remove the tray with the jigs.
1) Pull out the tray to the end of the stroke.
2) Insert the jigs from left and right sides of the tray at the same time.
3) Remove the tray with the jigs.
14
DV-HR300S/HR350S
DV-HR300H
DV-HR300X
DV-HR300H
DV-HR300X
Servicing training material (S1 writer mechanism)
1.
Main parts
Description
1)
Pickup
Reads/writes signals from/to discs.
2)
Motors
_Spindle
Rotates discs.
_Thread
Moves the pickup in the radial direction.
_Loading
Opens/closes the disc tray.
3)
Insulator
Reduces/blocks the vibration.
4)
Loader system
Up/down movement of the traverse, horizontal movement of the tray, casing
2.
Cleaning
1)
Lens
Wipe with a new cotton swab dampened with isopropyl alcohol, and then with a dry cloth.
2)
Turntable
Wipe with a new cotton swab dampened with isopropyl alcohol or water, and then with a dry
cloth.
3)
Tray
Wipe with a dry Dusper
∑
, cotton waste, etc., or one dampened with water.
4)
Clamper
Wipe with a Dusper
∑
or a new cotton swab dampened with isopropyl alcohol.
3.
Removing the tray
Insert the following jigs into the both sides of the tray. Remove the tray together with jigs.
4.
Defective discs
1)
Vibration while
The cause is the unbalance. (The standard varies from disc to disc.)
recording/
playing
playing
2)
Deformation
Not properly recorded/played.
(warpage, etc.)
3)
Dirt adhesion
Not properly recorded/played.
Material
Acrylic, etc.
7 mm
2.5 mm
100 mm
15
DV-HR300S/HR350S
DV-HR300H
DV-HR300X
DV-HR300H
DV-HR300X
6. OPERATION FLOWCHART AND TROUBLE SHOOTING
Power On Process 1
External power supply start (AC outlet
connection)
T
urn on
TT
microprocessor IC501 and
remote control light sensor
TT
microprocessor IC501 (14 MHz) starts
to oscillate
TT
microprocessor IC501 imports
E2PROM IC503 data and communicates
This pass is followed
when backup is
retained.
T
urn on power temporarily to
perform this process.
TT
microprocessor
initialization start
IC7506 startup & communication & stop
process
Standby after
-- : --
in the LCD display flashes
DISC information
acquisition
Cancel power-saving mode
This pass is followed
when backup is not
retained.
T
urn on power with remote control
or main unit
LCD display start/HDD and DVD LED
flash
TT
microprocessor IC501 sets PCON to
ON
Cancel IC7506 reset after approximately
160 msec from PCON
Startup operation start
Power On Process 2
16
DV-HR300S/HR350S
DV-HR300H
DV-HR300X
DV-HR300H
DV-HR300X
Power On Process 3
Cancel power-saving mode
Startup operation start
W
rite FLASH memory IC7509 contents to
SDRAM IC7510, 751
1
Initialize each pin in IC7506
Import data from E2PROM
TT
microprocessor IC501 starts to
communicate with IC7506
(4-wire serial communication)
IC7506 starts to communicate with writer
and HDD
Cancel MPEG encoder IC7304 and IC4501,
IC4005, IC4001, IC3502 reset
Initialize MPEG encoder IC7304, 3DYC
IC3502, Audio
DAC
Cancel video mute
Startup operation end
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