Toshiba Dvr4xsu Owners Manual

DISASSEMBLY INSTRUCTIONS
B3-2 D-VR4XSU/D-VR4XSC
Fig. 3-5 INSTALLATION
1. Take care of the polarity of new IC and then install the
new IC fitting on the printed circuit pattern. Then solder
each lead on the diagonal positions of IC temporarily.
(Refer to Fig. 3-5.)
Soldering Iron
Solder temporarily
Solder temporarily
2. Supply the solder from the upper position of IC leads
sliding to the lower position of the IC leads.
 (Refer to Fig. 3-6.)
Fig. 3-6
Solder
ICSoldering Iron
Supply soldering
from upper...

D-VR4XSU/D-VR4XSC
KEY TO ABBREVIATIONS
A
B
C
D
E
F
G
HA/C
ACC
AE
AFC
AFT
AFT DET
AGC
AMP
ANT
A.PB
APC
ASS’Y
AT
AUTO
A/V
BGP
BOT
BPF
BRAKE SOL
BUFF
B/W
C
CASE
CAP
CARR
CH
CLK
CLOCK (SY-SE)
COMB
CONV
CPM
CTL
CYL
CYL-M
CYL SENS
DATA (SY-CE)
dB
DC
DD Unit
DEMOD
DET
DEV
E
EF
EMPH
ENC
ENV
EOT
EQ
EXT
F
FBC
FE
FF
FG
FL SW
FM
FSC
FWD
GEN
GND
H.P.F:
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:Audio/Control
Automatic Color Control
Audio...

D-VR4XSU/D-VR4XSC
KEY TO ABBREVIATIONS
S
T
U
V
X
YSYNC
SYNC SEP
TR
TRAC
TRICK PB
TP
UNREG
V
VCO
VIF
VP
V. P B
VR
V.REC
VSF
VSR
VSS
V-SYNC
VT
X’TAL
Y/C:
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: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...

D-VR4XSU/D-VR4XSC 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.
Set Key Operations
CH...

D-VR4XSU/D-VR4XSC
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.
: Clean
: Check it and if necessary, replace it.
Time
Parts Name500
hours1,000
hoursNotes 1,500
hours2,000
hours2,500
hours...

D-VR4XSU/D-VR4XSC
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.
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.)
Audio Control Head
2. TAPE RUNNING SYSTEM
When cleaning the tape transport system, use the
gauze moistened with isopropyl...

C4-1
D-VR4XSU/D-VR4XSC
WHEN REPLACING EEPROM (MEMORY) IC
If a service repair is undertaken where it has been required to change the MEMORY IC, the following steps should be taken
to ensure correct data settings while making reference to TABLE 1 and 2.
NOTE:
VCR side EEPROM (IC3099) initial setting
Table 1 After the DATA change, if the ENTER button is not pressed at the DATA selection mode and the power is turned off,
the DATA change does not performed.
After the DATA change, press the ENTER button by all...

C4-2
D-VR4XSU/D-VR4XSC
TIMER side EEPROM (IC653) initial setting
Table 2
1.
2.
3.Connect the set to TV Monitor.
Turn on the POWER, and set to the DVD mode.
Press both Channel button (6) on the remote control and the STOP button on the set for more than 2 seconds.
ADDRESS and DATA will appear on the display as Fig 2 and the ADDRESS is now selected.
4.
5.
6.
7.
8.
9.
10.
11 .
12.Input the ADDRESS by using Tracking + or - button on the remote control.
Press ENTER to select DATA.
Again, step through the DATA...

C5-1D-VR4XSU/D-VR4XSC Connect the set to TV Monitor.
Turn on the POWER, and set to the DVD mode.
Confirm that the “No Disc” will be appeared on the screen.
A disc is already inserted, eject the disc and power it on again.
Place the Up-Date Disc and close the tray by hand. (Refer to SERVICING FIXTURE AND TOOLS)
Automatic read will start and writing indicator will be displayed on the screen.
After the writing indicator is full, the unit will reset and power on automatically.
Then, The tray will open...

SERVICING FIXTURES AND TOOLS
Taper nut driver
70909228 Back tension cassette gauge
70909103Torque cassette gauge
(KT-300NR)
70909199
Adapter
Dial Torque Gauge
(10~90gf•cm)
(60~600gf•cm)VTR cleaning kit VTR lubrication kit Grease JG002B
JG002E
JG002F
JG153 X Value Adjustment
ScrewdriverJG022 Master PlaneJG024A Reel Disk Height
Adjustment Jig Alignment Tape
ST-N5
ST-NF
JG185  TentelometerJG176  Up-Date Disc
Remarks Part No. Ref. No.Parts Name
JG002B
JG002E
JG002FAPJG002B00
APJG002E00
APJG002F00Adapter
Dial...