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 position
to lower position
3. Absorb the solder left on the lead using the Braided
Shield Wire. (Refer to Fig. 3-7.)
NOTE
Do not absorb the solder to excess.
Fig. 3-7
Soldering Iron
IC
Braided Shield Wire
4. When bridge-soldering between terminals and/or the
soldering amount are not enough, resolder using a Thin-
tip Soldering Iron. (Refer to Fig. 3-8.)
Fig. 3-8
Thin-tip Soldering IronIC
5. Finally, confirm the soldering status on four sides of the
IC using a magnifying glass.
Confirm that no abnormality is found on the soldering
position and installation position of the parts around the
IC. If some abnormality is found, correct by resoldering.
NOTE
When the IC leads are bent during soldering and/or
repairing, do not repair the bending of leads. If the
bending of leads are repaired, the pattern may be
damaged. So, be always sure to replace the IC in this
case. 
						

							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 Erase
Automatic Frequency Control
Automatic Fine Tuning
Automatic Fine Tuning Detect
Automatic Gain Control
Amplifier
Antenna
Audio Playback
Automatic Phase Control
Assembly
All Time
Automatic
Audio/Video
Burst Gate Pulse
Beginning of Tape
Bandpass Filter
Brake Solenoid
Buffer
Black and White
Capacitance, Collector
Cassette
Capstan
Carrier
Channel
Clock
Clock (Syscon to Servo)
Combination, Comb Filter
Converter
Capstan Motor
Control
Cylinder
Cylinder-Motor
Cylinder-Sensor
Data (Syscon to Servo)
Decibel
Direct Current
Direct Drive Motor Unit
Demodulator
Detector
Deviation
Emitter
Emitter Follower
Emphasis
Encoder
Envelope
End of Tape
Equalizer
External
Fuse
Feed Back Clamp
Full Erase
Fast Forward, Flipflop
Frequency Generator
Front Loading Switch
Frequency Modulation
Frequency Sub Carrier
Forward
Generator
Ground
High Pass FilterI
K
L
M
N
O
P
R
SH.SW
Hz
IC
IF
IND
INV
KIL
L
LED
LIMIT AMP
LM, LDM
LP
L.P.F
LUMI.
M
MAX
MINI
MIX
MM
MOD
MPX
MS SW
NC
NR
OSC
OPE
PB
PB CTL
PB-C
PB-Y
PCB
P. CON
PD
PG
P-P
R
REC
REC-C
REC-Y
REEL BRK
REEL S
REF
REG
REW
REV, RVS
RF
RMC
RY
S. CLK
S. COM
S. DATA
SEG
SEL
SENS
SER
SI
SIF
SO
SOL
SP
STB
SW:
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:Head Switch
Hertz
Integrated Circuit
Intermediate Frequency
Indicator
Inverter
Killer
Left
Light Emitting Diode
Limiter Amplifier
Loading Motor
Long Play
Low Pass Filter
Luminance
Motor
Maximum
Minimum
Mixer, mixing
Monostable Multivibrator
Modulator, Modulation
Multiplexer, Multiplex
Mecha State Switch
Non Connection
Noise Reduction
Oscillator
Operation
Playback
Playback Control
Playback-Chrominance
Playback-Luminance
Printed Circuit Board
Power Control
Phase Detector
Pulse Generator
Peak-to Peak
Right
Recording
Recording-Chrominance
Recording-Luminance
Reel Brake
Reel Sensor
Reference
Regulated, Regulator
Rewind
Reverse
Radio Frequency
Remote Control
Relay
Serial Clock
Sensor Common
Serial Data
Segment
Select, Selector
Sensor
Search Mode
Serial Input
Sound Intermediate Frequency
Serial Output
Solenoid
Standard Play
Serial Strobe
Switch
C1-1 
						

							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
Vertical-Synchronization
Voltage Tuning
Crystal
Luminance/Chrominance
C1-2 
						

							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 UPPLAY/REC total hours are displayed on the TV Monitor.
Refer to the “PREVENTIVE CHECKS AND SERVICE INTERVALS”
(CONFIRMATION OF HOURS USED).
Can be checked of the INITIAL DATA of MEMORY IC (SERVO side).
Refer to the “WHEN REPLACING EEPROM (MEMORY) IC”. Set Key
FF 2 sec.
CH UP PLAY 2 sec.Initialization of the factory.
NOTE: If you set a factory initialization, the memories are reset
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
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
Adjust the PG SHIFTER automatically.
Refer to the “ELECTRICAL ADJUSTMENT”. VCR/DVD REC 2 sec.
Set
Condition
VCR mode
VCR mode
(Playback)
VCR mode
VCR mode
(Playback) DVD mode
Set KeyOperations Remocon
KeyStandard
Time
Tray cannot be opened.
Refer to the “TRAY LOCK”. STOP 0 2 sec. Set
Condition
DVD mode
(STOP)
Information screen displayed on the TV Monitor.
Refer to the “WHEN REPLACING NEW DVD LOADER”. CH DOWN VCR/DVD 2 sec. Power On
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
selected.Power Off
Can be checked of the INITIAL DATA of MEMORY IC (TIMER side).
Refer to the “WHEN REPLACING EEPROM (MEMORY) IC”. STOP 6 2 sec. DVD mode
(No disc)
Releasing of PARENTAL LOCK.
Refer to the “PARENTAL CONTROL - RATING LEVEL”. STOP 7 2 sec. DVD mode
(No disc)
Region setting.
Refer to the “WHEN REPLACING NEW DVD LOADER”. STOP 8 2 sec. DVD mode
(STOP)
DVD Write mode.
Refer to the “RE-WRITE FOR DVD FIRMWARE”. STOP 2 2 sec. DVD mode
(No disc) 
						

							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
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
Cylinder UnitClean those parts in
contact with the tape.
Clean the rubber, and parts
which the rubber touches.
Replace when rolling
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.
NOTE: If you set a factory initialization, the total hours is reset to “0”.
1.
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.
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)
Fig. 1Initial setting data check sum.
Romcorrection data check sum.
MICON VersionOEC8080A 0624
INIT   00   0F
DATA  073D
ROM   B401
PLAY/REC  0000 
						

							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 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.)
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.
Cylinder Head
PREVENTIVE CHECKS AND SERVICE INTERVALS
C3-2 
						

							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 means and set to the ADDRESS selection mode, then turn off
the power.
I N I +0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +A +B +C +D +E +F
000 0F 0A 11 4B 1A 54 88 44 AA 93 90 85 99 AA B6 1A
010 0B 27 16 27 30 01 31 18 03 3D 00 00 00 00 00 00
1.
2.
3.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.
ADDRESS and DATA will appear on TV Monitor as Fig 1.
4.
5.
6.
7.
8.
9.
10.
11 .
12.
The unit will now have the correct DATA for the new MEMORY IC.ADDRESS is now selected and should “blink”. Using the Tracking + or - button on the remote, step through the ADDRESS
until required ADDRESS to be changed is reached.
Press ENTER to select DATA. When DATA is selected, it will “blink”.
Again, step through the DATA using Tracking + or - button until required DATA value has been selected.
Pressing ENTER will take you back to ADDRESS for further selection if necessary.
Repeat steps 4 to 7 until all data has been checked.
When satisfied correct DATA has been entered, turn POWER off (return to STANDBY MODE) to finish DATA input.
After the data input, set to the initializing of shipping.
Turn on the POWER, and set to the DVD mode.
Press both CH UP button on the set and the PLAY button on the set for more than 2 seconds.
After the finishing of the initializing of shipping, the unit will turn off automatically.Fig. 1
OEC8080A 0624
INIT   00   0F
DATA  073D
ROM   B401
PLAY/REC  0000
ADDRESS
DATA 
						

							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 using Tracking + or - button until required DATA value has been selected.
Pressing ENTER will take you back to ADDRESS for further selection if necessary.
Repeat steps 4 to 7 until all data has been checked.
When satisfied correct DATA has been entered, turn POWER off (return to STANDBY MODE) to finish DATA input.
After the data input, set to the initializing of shipping.
Turn on the POWER, and set to the DVD mode.
Press both CH UP button on the set and the PLAY button on the set for more than 2 seconds.
After the finishing of the initializing of shipping, the unit will turn off automatically.Fig. 2
ADDRESS DATA
WHEN REPLACING EEPROM (MEMORY) IC
I N I +0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +A +B +C +D +E +F
0 0 0 F E FF FF FF FF FF FF FF 1 F FF FF FF FF FF FF FF
0 1 0 FF FF FF FF FF FF FF FF 1 F 0 2 0 2 2 1 0 5 0 1 0 1 FF
0 2 0 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0 3 0 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0 4 0 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0 5 0 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0 6 0 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0 7 0 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0 8 0 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
090 FF FF FF FF 00 00 00 00 40 48 00 01 00 00 0A 00
0 A 0 FF FF 0 0 0 5 6 0 2 4 0 0 9 9 FF FF FF FF FF FF FF FF
The unit will now have the correct DATA for the new MEMORY IC. 
						

							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 automatically. Remove the Up-Date Disc.
The writing will be finished.
NOTE: Do not turn off the unit on the way .
            Up-Date error will happen and can not be done with the Up-Date of Up-Date Disc.
Unplug the AC cord, then plug it in.
After the write, set to the initializing of shipping.
Turn on the POWER, and set to the DVD mode.
Press both CH UP button on the set and the PLAY button on the set for more than 2 seconds.
After the finishing of the initializing of shipping, the unit will turn off automatically.
CHECK FOR THE FIRMWARE VERSION
Turn on the POWER, and set to the DVD mode.
Press both CH DOWN button on the set and the DVD/VCR button on the set for more than 2 seconds.
Information screen will be displayed on the TV Monitor. (Refer to Fig. 1)
When the changed version displays, the Re-write will be completed.
Turn off the power
RE-WRITE FOR DVD FIRMWARE
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
Fig. 1
XAA58030
OEC8079A025C
OEC8080A0624
9788  348D
00004
00000
MATSHITA
DVD-RAM SW-9574
MR20
Region-1 MV2base.
Timer
VCR
C.Sum 1
P.On Time
VCR Time
DVDFirmware Version 
						

							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 Torque Gauge (10~90gf•cm)
Dial Torque Gauge (60~600gf•cm)VSR Torque, Brake Torque (S Reel/T Reel Assy)
Brake Torque (T Reel Assy)
VSR Torque, Brake Torque (S Reel)
APJG022000 JG022 Master Plane Reel Disk Height Adjustment
JG024A APJG024A00 Reel Disk Height Adjustment Jig Reel Disk Height Adjustment
JG153 APJG153000 X Value Adjustment Screwdriver X Value Adjustment
JG176 APJG176078 Up-Date Disc Up-Date of the Firmware
D1-1
JG185 APJG185000 Tentelometer Confirmation of Tape Tension on Playback
PREPARATION FOR SERVICING
1.
2.
3.While pressing the CH DOWN button on the set for more than 2 seconds, press the POWER button on the set
simultaneously at the Power OFF. Although the DVD is connected, the DVD mode cannot be selected.
Press both CH UP button on the set and the REC button on the set for more than 2 seconds.
(The BOT, EOT, and the Reel Sensor do not work and the VCR deck can be operated without a cassette tape.)
In case of using a cassette tape, press the EJECT button to insert or eject a cassette tape.
Turn on the power and re-check the cable before checking the trouble points.
When you servicing with connection of DVD, perform the operations above step 2 to step 3.
D-VR4XSU/D-VR4XSC