Sharp DV-RW250H (serv.man5) Service Manual ▷ View online
KEY TO ABBREVIATIONS
S
T
U
V
V
X
Y
Y
SYNC
SYNC SEP
TR
TRAC
TRICK PB
TP
UNREG
V
VCO
VIF
VP
V.PB
VR
V.REC
VSF
VSR
VSS
V-SYNC
VT
X’TAL
Y/C
SYNC SEP
TR
TRAC
TRICK PB
TP
UNREG
V
VCO
VIF
VP
V.PB
VR
V.REC
VSF
VSR
VSS
V-SYNC
VT
X’TAL
Y/C
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
Synchronization
Sync Separator, Separation
Transistor
Tracking
Trick Playback
Test Point
Unregulated
Volt
Voltage Controlled Oscillator
Video Intermediate Frequency
Vertical Pulse, Voltage Display
Video Playback
Variable Resistor
Video Recording
Visual Search Fast Forward
Visual Search Rewind
Voltage Super Source
Vertical-Synchronization
Voltage Tuning
Crystal
Luminance/Chrominance
Sync Separator, Separation
Transistor
Tracking
Trick Playback
Test Point
Unregulated
Volt
Voltage Controlled Oscillator
Video Intermediate Frequency
Vertical Pulse, Voltage Display
Video Playback
Variable Resistor
Video Recording
Visual Search Fast Forward
Visual Search Rewind
Voltage Super Source
Vertical-Synchronization
Voltage Tuning
Crystal
Luminance/Chrominance
C1-2
C2-1
SERVICE MODE LIST
This unit provided with the following SERVICE MODES so you can repair, examine and adjust easily.
To enter to the SERVICE MODE function, press and hold both buttons simultaneously on the main unit or on the main unit
and on the remote control for more than a standard time in the appropriate condition. (See below chart.)
In case of the main unit and remote control, press the remote control buttons first, then press the main unit buttons.
To enter to the SERVICE MODE function, press and hold both buttons simultaneously on the main unit or on the main unit
and on the remote control for more than a standard time in the appropriate condition. (See below chart.)
In case of the main unit and remote control, press the remote control buttons first, then press the main unit buttons.
Set Key
Operations
CH UP
PLAY/REC total hours are displayed on the TV Monitor.
Refer to the “PREVENTIVE CHECKS AND SERVICE INTERVALS”
(CONFIRMATION OF HOURS USED).
Refer to the “PREVENTIVE CHECKS AND SERVICE INTERVALS”
(CONFIRMATION OF HOURS USED).
Can be checked of the INITIAL DATA of MEMORY IC.
Refer to the “WHEN REPLACING EEPROM (MEMORY) IC”.
Refer to the “WHEN REPLACING EEPROM (MEMORY) IC”.
Set Key
FF
2 sec.
CH UP
PLAY
2 sec.
Initialization of the factory on VCR.
NOTE: Do not use this for the normal servicing.
NOTE: Do not use this for the normal servicing.
If you set a factory initialization, the memories are reset
such as the clock setting, the channel setting, and PLAY/
REC total hours.
such as the clock setting, the channel setting, and PLAY/
REC total hours.
Standard
Time
Adjusting of the Tracking to the center position.
NOTE: Also can be adjusted by pressing the ATR button for more
NOTE: Also can be adjusted by pressing the ATR button for more
than 2 seconds during PLAY.
CH UP
CH DOWN
2 sec.
CH UP
REC
2 sec.
The BOT, EOT, and the Reel Sensor do not work and the VCR
deck can be operated without a cassette tape.
Refer to the "PREPARATION FOR SERVICING"
deck can be operated without a cassette tape.
Refer to the "PREPARATION FOR SERVICING"
Adjust the PG SHIFTER automatically.
Refer to the “ELECTRICAL ADJUSTMENT”.
Refer to the “ELECTRICAL ADJUSTMENT”.
VCR/DVD
REC
2 sec.
Set
Condition
VCR mode
VCR mode
(Playback)
VCR mode
VCR mode
(Playback)
Power On
Set Key
Operations
Remocon
Key
Standard
Time
Initialization of the factory on DVD.
NOTE: Do not use this for the normal servicing.
NOTE: Do not use this for the normal servicing.
STOP
6
2 sec.
Tray cannot be opened.
Refer to the “TRAY LOCK”.
NOTE:
Refer to the “TRAY LOCK”.
NOTE:
STOP
0
2 sec.
No indications on the screen when the Tray Lock is setting.
The function will only work without the setting of DVD disc
at DVD mode.
The function will only work without the setting of DVD disc
at DVD mode.
Set
Condition
DVD mode
(No disc)
DVD mode
(STOP)
Releasing of PARENTAL LOCK.
Refer to the “PARENTAL CONTROL - RATING LEVEL”.
NOTE: The function will only work without the setting of DVD disc
Refer to the “PARENTAL CONTROL - RATING LEVEL”.
NOTE: The function will only work without the setting of DVD disc
at DVD mode.
STOP
7
2 sec.
DVD mode
(No disc)
Region setting.
Refer to the “WHEN REPLACING NEW DVD LOADER”.
Refer to the “WHEN REPLACING NEW DVD LOADER”.
STOP
8
2 sec.
DVD mode
(STOP)
CH DOWN
POWER
2 sec.
VCR operation mode at no connection of DVD.
Refer to the “PREPARATION FOR SERVICING”
NOTE: Although the DVD is connected, the DVD mode cannot be
Refer to the “PREPARATION FOR SERVICING”
NOTE: Although the DVD is connected, the DVD mode cannot be
selected.
Power Off
Information screen displayed on the TV Monitor.
Refer to the “WHEN REPLACING NEW DVD LOADER”.
Refer to the “WHEN REPLACING NEW DVD LOADER”.
CH DOWN
VCR/DVD
2 sec.
Power On
VER.OEC0145A318D
INIT 00 D7
DATA 1547
ROM 13BD
ROM 13BD
PLAY/REC 0010
PREVENTIVE CHECKS AND SERVICE INTERVALS
The following standard table depends on environmental conditions and usage.
Parts replacing time does not mean the life span for individual parts.
Also, long term storage or misuse may cause transformation and aging of rubber parts.
The following list means standard hours, so the checking hours depends on the conditions.
Parts replacing time does not mean the life span for individual parts.
Also, long term storage or misuse may cause transformation and aging of rubber parts.
The following list means standard hours, so the checking hours depends on the conditions.
: Clean
: Check it and if necessary, replace it.
: Check it and if necessary, replace it.
Time
Parts Name
500
hours
1,000
hours
hours
Notes
1,500
hours
hours
2,000
hours
hours
2,500
hours
hours
Audio Control Head
Full Erase Head
(Recorder only)
Capstan Belt
Pinch Roller
Capstan DD Unit
Loading Motor
Tension Band
Capstan Shaft
Tape Running
Guide Post
Guide Post
Cylinder Unit
Clean those parts in
contact with the tape.
contact with the tape.
Clean the rubber, and parts
which the rubber touches.
which the rubber touches.
Replace when rolling
becomes abnormal.
becomes abnormal.
Clean the Head
T Brake Band
Clutch Ass’y
Idler Arm Ass’y
C3-1
CONFIRMATION OF HOURS USED
PLAY/REC total hours can be checked on the screen.
Total hours are displayed in 16 system of notation.
Total hours are displayed in 16 system of notation.
NOTE: If you set a factory initialization, the total hours is reset to “0”.
1.
2.
3.
2.
3.
4.
Connect the set to TV Monitor.
Turn on the POWER, and set to the VCR mode.
Press both CH UP button on the set and the FF button on the set for more than 2 seconds.
The Fig. 1 screen will appear on TV Monitor.
After the confirmation of using hours, turn off the power.
Turn on the POWER, and set to the VCR mode.
Press both CH UP button on the set and the FF button on the set for more than 2 seconds.
The Fig. 1 screen will appear on TV Monitor.
After the confirmation of using hours, turn off the power.
Initial setting content of MEMORY IC.
PLAY/REC total hours.
= (16 x 16 x 16 x thousands digit value)
+ (16 x 16 x hundreds digit value)
+ (16 x tens digit value)
+ (ones digit value)
= (16 x 16 x 16 x thousands digit value)
+ (16 x 16 x hundreds digit value)
+ (16 x tens digit value)
+ (ones digit value)
Fig. 1
Initial setting data check sum.
Romcorrection data check sum.
Romcorrection data check sum.
MICON Version
CLEANING
NOTE
After cleaning the heads with isopropyl alcohol, do not
run a tape until the heads dry completely. If the heads
are not completely dry and alcohol gets on the tape,
damage may occur.
run a tape until the heads dry completely. If the heads
are not completely dry and alcohol gets on the tape,
damage may occur.
1. AUDIO CONTROL HEAD
Clean the Audio Control Head with the cotton stick
soaked by alcohol. Clean the full erase head in the
same manner. (Refer to the figure below.)
soaked by alcohol. Clean the full erase head in the
same manner. (Refer to the figure below.)
Audio Control Head
2. TAPE RUNNING SYSTEM
When cleaning the tape transport system, use the
gauze moistened with isopropyl alcohol.
gauze moistened with isopropyl alcohol.
3. CYLINDER
Wrap a piece of chamois around your finger. Dip it in
isopropyl alcohol. Hold it to the cylinder head softly.
Turn the cylinder head counterclockwise to clean it (in
the direction of the arrow). (Refer to the figure below.)
isopropyl alcohol. Hold it to the cylinder head softly.
Turn the cylinder head counterclockwise to clean it (in
the direction of the arrow). (Refer to the figure below.)
NOTE
Do not exert force against the cylinder head. Do not move
the chamois upward or downward on the head.
Use the chamois one by one.
the chamois upward or downward on the head.
Use the chamois one by one.
Cylinder Head
PREVENTIVE CHECKS AND SERVICE INTERVALS
C3-2
Click on the first or last page to see other DV-RW250H (serv.man5) service manuals if exist.