As for the places which need special attentions,
they are indicated with the labels or seals on the
cabinet, chassis and parts. Make sure to keep the
indications and notices in the operation manual.
2. AVOID AN ELECTRIC SHOCK
There is a high voltage part inside. Avoid an
electric shock while the electric current is
flowing.
3. USE THE DESIGNATED PARTS
The parts in this equipment have the specific
characters of incombustibility and withstand
voltage for safety. Therefore, the part which is
replaced should be used the part which has
the same character.
Especially as to the important parts for safety
which is indicated in the circuit diagram or the
table of parts as a mark, the designated
parts must be used.
4. PUT PARTS AND WIRES IN THE
ORIGINAL POSITION AFTER
ASSEMBLING OR WIRING
There are parts which use the insulation
material such as a tube or tape for safety, or
which are assembled in the condition that
these do not contact with the printed board.
The inside wiring is designed not to get closer
to the pyrogenic parts and high voltage parts.
Therefore, put these parts in the original
positions.
5. TAKE CARE TO DEAL WITH THE
CATHODE-RAY TUBE
In the condition that an explosion-proof cathoderay tube is set in this equipment, safety is
secured against implosion. However, when
removing it or serving from backward, it is
dangerous to give a shock. Take enough care to
deal with it.
6. AVOID AN X-RAY1. KEEP THE NOTICES
Safety is secured against an X-ray by considering about the cathode-ray tube and the high
voltage peripheral circuit, etc.
Therefore, when repairing the high voltage peripheral circuit, use the designated parts and
make sure not modify the circuit.
Repairing except indicates causes rising of high
voltage, and it emits an X-ray from the cathoderay tube.
PERFORM A SAFETY CHECK AFTER
7.
SERVICING
Confirm that the screws, parts and wiring which
were removed in order to service are put in the
original positions, or whether there are the
portions which are deteriorated around the
serviced places serviced or not. Check the
insulation between the antenna terminal or
external metal and the AC cord plug blades.
And be sure the safety of that.
(INSULATION CHECK PROCEDURE)
1.
Unplug the plug from the AC outlet.
2.
Remove the antenna terminal on TV and turn
on the TV.
3.
Insulation resistance between the cord plug
terminals and the eternal exposure metal
[Note 2] should be more than 1M ohm by
using the 500V insulation resistance meter
[Note 1].
4.
If the insulation resistance is less than 1M
ohm, the inspection repair should be
required.
[Note 1]
If you have not the 500V insulation
resistance meter, use a Tester.
[Note 2]
External exposure metal: Antenna terminal
HOW TO ORDER PARTS
Please include the following informations when you order parts. (Particularly the VERSION LETTER.)
1. MODEL NUMBER and VERSION LETTER
The MODEL NUMBER can be found on the back of each product and the VERSION LETTER can be
found at the end of the SERIAL NUMBER.
2. PART NO. and DESCRIPTION
You can find it in your SERVICE MANUAL.
A1-1
TAPE REMOVAL METHOD AT NO POWER SUPPLY
1.
Remove the VCR block from the main unit.
(Refer to item 1 of the DISASSEMBLY INSTRUCTIONS.)
2.
Remove the screw 1 of the Deck Chassis and remove the Loading Motor.
3.
Rotate the Pinch Roller Cam in the direction of the arrow by hand to slacken the Video Tape.
4.
Rotate the Clutch Ass'y either of the directions to wind the Video Tape in the Cassette Case.
5.
Repeat the above step 3~4. Then take out the Video Cassette from the Deck Chassis. Be careful not to
scratch on the tape.
Loading Motor
Screw 1
Capstan DD Unit
Pinch Roller Cam
Main Cam
Clutch Ass'y
Main Chassis (Front Side)
A1-2
TABLE OF CONTENTS
SERVICING NOTICES ON CHECKING.....................................................................................
HOW TO ORDER PARTS ..........................................................................................................
TAPE REMOVAL METHOD AT NO POWER SUPPLY ............................................................
TABLE OF CONTENTS..............................................................................................................
GENERAL SPECIFICATIONS ...................................................................................................
DISASSEMBLY INSTRUCTIONS
1. REMOVAL OF MECHANICAL PARTS AND P. C. BOARDS............................................
2. REMOVAL OF VCR DECK PARTS ...................................................................................
3. REMOVAL OF ANODE CAP..............................................................................................
4. REMOVAL AND INSTALLATION OF FLAT PACKAGE IC ...............................................
KEY TO ABBREVIATIONS ........................................................................................................
SERVICE MODE LIST ................................................................................................................
PREVENTIVE CHECKS AND SERVICE INTERVALS..............................................................
WHEN REPLACING EEPROM (MEMORY) IC ..........................................................................
SERVICING FIXTURES AND TOOLS .......................................................................................
PREPARATION FOR SERVICING.............................................................................................
EjectYes
Counter ResetYes
SpeedYes
TV MonitorYes
Quick View(Channel Return)Yes
ProgramYes
Slow
Auto Tracking(Digital Tracking)Yes
Tracking+Yes
Tracking -Yes
MenuYes
EnterYes
CancelYes
CallYes
Closed Caption(TV/Caption/Text)Yes
Sleep TimerYes
MuteYes
Zero ReturnYes
CM Skip(Skip Search)Yes
Audio Select
Yes
Yes
Yes
min.
min.
prog.
min.
sec.
Keys
No
No
A3-3
GENERAL SPECIFICATIONS
G-13FeaturesAuto Head Cleaning
Auto TrackingYes
HQ (VHS Standard High Quality)Yes
Auto Power On, Auto Play, Auto Rewind, Auto EjectYes
VIDEO PLUS+(SHOWVIEW,G-CODE)
Auto ClockYes
Forward / Reverse Picture SearchYes
One Touch Playback
Auto CH MemoryYes
Closed CaptionYes
TV Auto Shut off FunctionYes
End Call
Index SearchYes
SQPB
CATVYes
CM Skip(30sec x 6 Times)Yes
Comb Filter
TV MonitorYes
Program Extend
Choke Coil
Energy StarYes
Dirty Head
V-chipUSA V-chip
CANADA V-chip
CM Advance
Movie Advance
Zero ReturnYes
Power On Memory
Picture PreferenceYes
Auto SetupYes
Protect of FBT Leak CircuitYes
w/Guarantee CardYes
Remote Control UnitYes
BatteryYes
UM size x pcsUM-4 x 2 pcs
OEM BrandNo
Rod Antenna
Poles-
Terminal-
W/300 ohm to 75 ohm antenna adapter-
Loop Antenna
TerminalU/V Mixer
300 ohm to 75 ohm Antenna AdapterYes
Antenna Change Plug
DC Car Cord (Center+)
AC Plug Adapter
AC Cord
AV Cord (2Pin-1Pin)
Guarantee Card
Registration Card
ESP Card
Warning Sheet
Dew/AHC Caution Sheet
Quick Set-up Sheet
Circuit Diagram
Service Station List
Important Safeguard
Sheet Information (Return)No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
A3-4
GENERAL SPECIFICATIONS
G-15InterfaceSwitchPowerYes
IndicatorPower
Key Light upRec/OTR
TerminalsFrontVideo InputRCA x 1
RearVideo Input
G-16Set SizeApprox. W x D x H (mm)362 x 365 x 382
G-17WeightNet (Approx.)11.0 kg( 24.3 lbs)
G-18CartonMaster Carton
Gift BoxYes
Drop TestNatural Dropping At
Container Stuffing(40' container)700
G-19MaterialCabinetFrontPS94V0 DECABROM
PCBNon-Halogen DemandNo
G-20EnvironmentPb FreeLead-free SolderNo
Cd FreeNo
PlayYes
Pause/Still
One Touch Playback
Channel UpYes
Channel DownYes
F.FWD/CueYes
Eject/StopYes
Main Power SW
Volume UpYes
Volume DownYes
Rew/RevYes
Rec/OTRYes
Input Select
Rec/OTRYes (Red)
T-RecYes (Red)
On Timer
CS
One Touch Playback
Play
Audio InputRCA x 1
Other TerminalHead Phone(Stereo & Mono, 3.5mm)
Audio Input
Video Output
Audio Output
Euro Scart
Diversity
Ext Speaker
DC Jack 12V(Center +)
VHF/UHF Antenna Input
AC Inlet
Gross (Approx.)12.5 kg( 27.6 lbs)
Content-
Material-
Dimensions W x D x H(mm)-
Description of Origin-
MaterialDouble/White
Dimensions W x D x H(mm)423 x 447 x 443
DesignAs per Buyer's
Description of OriginYes
Height (cm)62
RearPS94V0 DECABROM
Jack Panel-
Eyelet DemandYes
OtherNo
F Type
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
1 Corner / 3 Edges / 6 Surfaces
Sets
A3-5
DISASSEMBLY INSTRUCTIONS
1. REMOVAL OF MECHANICAL PARTS
AND P.C. BOARDS
1-1: BACK CABINET (Refer to Fig. 1-1)
1.
Remove the 4 screws 1.
2.
Remove the AC cord from the AC cord hook 2.
3.
Remove the Back Cabinet in the direction of arrow.
Front Cabinet
1
1
1
1
1-2: CRT PCB (Refer to Fig. 1-2)
CAUTION: BEFORE REMOVING THE ANODE CAP,
DISCHARGE ELECTRICITY BECAUSE IT
CONTAINS HIGH VOLTAGE.
BEFORE ATTEMPTING TO REMOVE OR
REPAIR ANY PCB, UNPLUG THE POWER
CORD FROM THE AC SOURCE.
1.
Remove the Anode Cap.
(Refer to REMOVAL OF ANODE CAP)
2.
Disconnect the following connector: (CP801).
3.
Remove the CRT PCB in the direction of arrow.
Front Cabinet
2
Back Cabinet
Fig. 1-1
CRT PCB
1-3: TV/VCR BLOCK (Refer to Fig. 1-3)
1.
Remove the 2 screws 1.
2.
Disconnect the following connectors:
(CP352, CP401 and CP502).
3.
Unlock the support 2.
4.
Remove the TV/VCR Block in the direction of arrow.
Front Cabinet
1
TV/VCR Block
1
2
UP TO
RELEASE
Fig. 1-3
1-4: DECK CHASSIS AND SYSCON PCB
(Refer to Fig. 1-4)
1.
Remove the 2 screws 1.
2.
Remove the screw 2.
3.
Remove the Deck Shield Plate in direction of arrow (A).
4.
Remove the 3 screws 3.
5.
Disconnect the following connectors:
(CP1001, CP4001, CP4002 and CP4003).
6.
Remove the Deck Chassis in the direction of arrow (B).
7.
Remove the screw 4.
8.
Remove the Syscon PCB in the direction of arrow (C).
1
2
1
Deck Shield Plate
333
(A)
Fig. 1-2
B1-1
(B)
Deck Chassis
4
(C)
Syscon PCB
Deck Holder
Fig. 1-4
DISASSEMBLY INSTRUCTIONS
2. REMOVAL OF VCR DECK PARTS
2-1: TOP BRACKET (Refer to Fig. 2-1)
Extend the 2 supports 1.
1.
Slide the 2 supports 2 and remove the Top Bracket.
2.
NOTE
After the installation of the Top Bracket, bend the support
1.
1 so that the Top Bracket is fixed.
Top Bracket
1
Top Bracket
2
Main Chassis
2
Main Chassis
2-2: CASSETTE HOLDER ASS'Y (Refer to Fig. 2-2)
1.
Move the Cassette Holder Ass'y to the front side.
2.
Push the Locker R to remove the Cassette Side R.
3.
Remove the Cassette Side L.
Cassette Side R
Main Chassis
1
Locker R
Fig. 2-1
NOTE
1.2.In case of the Locker R installation, check if the one
position of Fig.2-3-B are correctly locked.
When you install the Cassette Side R, be sure to move
the Locker R after installing.
Locker R
Check if this position
Cassette Side R
is locked.
Fig. 2-3-B
2-4: LINK UNIT (Refer to Fig. 2-4)
1.
Set the Link Unit to the Eject position.
2.
Unlock the support 1.
3.
Remove the (A) side of the Link Unit first, then remove
the (B) side.
Main Chassis
Link Unit
Link Unit
Cassette Side L
Main Chassis
2-3: CASSETTE SIDE L/R (Refer to Fig. 2-3-A)
1.
Remove the Locker Spring.
2.
Unlock the 4 supports 1 and then remove the Cassette
Side L/R.
3.
Unlock the support 2 and then remove the Locker R.
Locker Spring
1
1
2
Cassette Side R
Cassette Holder
Locker R
1
1
Cassette Side L
Fig. 2-2
(A)
(B)
Link Unit
2-5: LINK LEVER/FLAP LEVER/BOT COVER
(Refer to Fig. 2-5)
Unlock the support 1.
1.
Remove the BOT Cover.
2.
Extend the support 2.
3.
Remove the Link Lever.
4.
Remove the Flap Lever.
5.
1
2
Flap Lever
BOT Cover
Link Lever
Main Chassis
Fig. 2-4
Fig. 2-3-A
Fig. 2-5
B2-1
DISASSEMBLY INSTRUCTIONS
2-6: LOADING MOTOR/WORM (Refer to Fig. 2-6-A)
1.
Remove the screw 1.
2.
Remove the Loading Motor.
3.
Remove the Worm.
Loading Motor
Worm
Main Chassis
• Screw Torque: 3 ± 0.5kgf•cm
1
Fig. 2-6-A
NOTE
1.
In case of the Worm installation, check if the value of the
Fig. 2-6-B is correct.
2.
In case of the Loading Motor installation, hook the wire on
the Cassette Opener as shown Fig. 2-6-C.
3.
When installing the wires between Capstan DD Unit and
Loading Motor, connect them correctly as shown Fig. 2-6-D.
19.2 ± 0.1mm
2-7: TENSION ASS’Y (Refer to Fig. 2-7-B)
1.
Turn the Pinch Roller Cam clockwise so that the Tension
Holder hook is set to the position of Fig. 2-7-A to move
the Tension Arm Ass’y.
2.
Remove the Tension Spring.
3.
Unlock the 2 supports 1 and remove the Tension Band.
4.
Unlock the support 2 and remove the Tension Arm Ass’y.
5.
Unlock the support 3 and remove the Tension Connect.
6.
Float the hook 4 and turn it clockwise then remove the
Tension Holder.
Tension Arm Ass’y
Fig. 2-7-A
1
Tension Connect
Tension Spring
2
4
1
3
Tension Holder
Tension Band
Tension Arm Ass’y
Loading Motor
-
+
Safety surface for pressing
of the insert.
Pink
White
Fig. 2-6-B
Loading Motor
Cassette Opener
Fig. 2-6-C
Capstan DD Unit
L2
L1
Fig. 2-6-D
B2-2
Fig. 2-7-B
NOTE
1.
In case of the Tension Band installation, note the direction of the installation. (Refer to Fig. 2-7-C)
2.
In case of the Tension Band installation, install correctly
as Fig. 2-7-D.
3.
In case of the Tension Connect installation, install as the
circled section of Fig. 2-7-E.
Tension Connect
Tension Band
Fig. 2-7-C
[OK]
[NG]
Tension Connect
Tension Connect
Tension Connect
DISASSEMBLY INSTRUCTIONS
NOTE
1.
Take care not to damage the gears of the S Reel and T
Tension Band
Tension Band
Fig. 2-7-D
Reel.
2.
The Polyslider Washer may be remained on the back of
the reel.
3.
Take care not to damage the shaft.
4.
Do not touch the section “A” of S Reel and T Reel. (Use
gloves.) (Refer to Fig. 2-9-A) Do not adhere the stains
on it.
5.
When you install the reel, clean the shaft and grease it. (If
you do not grease, noise may be heard in FF/REW
mode.)
6.
After installing the reel, adjust the height of the reel.
(Refer to MECHANICAL ADJUSTMENT)
Main Chassis
Fig. 2-7-E
2-8: T BRAKE ARM/T BRAKE BAND (Refer to Fig. 2-8-A)
Remove the T Brake Spring.
1.
Turn the T Brake Arm clockwise and bend the hook
2.
section to remove it.
Unlock the 2 supports 1 and remove the T Brake Band.
3.
T Brake Band
Hook section
1
1
T Brake Arm
T Brake Spring
Fig. 2-8-A
NOTE
1. In case of the T Brake Band installation, install correctly
as Fig. 2-8-B.
Idler Gear
Idler Arm Ass’y
S Reel
(A)
(B)
T Reel
1
(A)
1
Fig. 2-9-A
NOTE
1.2.In case of the S Reel and T Reel installation, check if the
correct parts are installed. (Refer to Fig. 2-9-B)
In case of the Idler Arm Ass’y installation, install correctly
as Fig. 2-9-C. And also set it so that the section “B” of
Fig. 2-9-A is placed under the Main Chassis tab.
[OK]
T Brake Band
[NG]
T Brake Band
T Brake Arm
T Brake Arm
Fig. 2-8-B
2-9: S REEL/T REEL/IDLER ARM ASS’Y/IDLER GEAR
(Refer to Fig. 2-9-A)
1.
Remove the S Reel and T Reel.
2.
Remove the 2 Polyslider Washers 1.
3.
Remove the Idler Arm Ass’y and Idler Gear.
B2-3
[OK]
[NG]
Clutch Gear
Clutch Gear
Big Hole
(S Reel)
Small Hole
(T Reel)
Fig. 2-9-B
Idler Arm Ass’y
Idler Arm Ass’y
Fig. 2-9-C
DISASSEMBLY INSTRUCTIONS
2-10: CASSETTE OPENER/PINCH ROLLER BLOCK/P5
ARM ASS’Y (Refer to Fig. 2-10-A)
1.2.Unlock the support 1 and remove the Cassette Opener.
Remove the Pinch Roller Block and P5 Arm Ass’y.
1
Cassette Opener
Pinch Roller Block
P5 Arm Ass’y
Main Chassis
Fig. 2-10-A
NOTE
1.2.Do not touch the Pinch Roller. (Use gloves.)
In case of the Pinch Roller Block and the Pinch Roller
Cam installation, install correctly as Fig. 2-10-B.
Pinch Roller Block
P5 Arm Ass’y
Can be seen the hole of the
Main Cam.
Can be seen the hole of
the Pinch Roller Cam.
Fig. 2-10-B
2-11: A/C HEAD (Refer to Fig. 2-11-A)
1.
Remove the screw 1.
2.
Remove the A/C Head Base.
3.
Remove the 3 screws 2.
4.
Remove the A/C Head and A/C Head Spring.
NOTE
1.
Do not touch the A/C Head. (Use gloves.)
2.
When you install the A/C Head Spring, install as shown in
Fig. 2-11-B.
3.
When you install the A/C Head, tighten the screw (1) first,
then tighten the screw (2), finally tighten the screw (3).
Spring Position
Fig. 2-11-B
2-12: FE HEAD (RECORDER ONLY) (Refer to Fig. 2-12)
Remove the screw 1.
1.
Remove the FE Head.
2.
1
FE Head
• Screw Torque: 5 ± 0.5kgf•cm
• The FE Head is not installed on the Video Cassette Player.
Fig. 2-12
2-13: CYLINDER UNIT ASS'Y (Refer to Fig. 2-13)
Disconnect the following connector:
1.
(CD2001)
Remove the 3 screws 1.
2.
Remove the Cylinder Unit Ass'y.
3.
NOTE
When you install the Cylinder Unit Ass'y, tighten the
1.
screws from (1) to (3) in order while pulling the Ass'y
toward the left front direction.
Cylinder Unit Ass'y
(1)
2
2
(2)
1
• Screw Torque: 5 ± 0.5kgf•cm (Screw 1)
(3)
2
A/C Head
A/C Head Spring
A/C Head Base
Fig. 2-11-A
B2-4
• Screw Torque: 3 ± 0.5kgf•cm
(3)
(2)
(1)
1
1
1
Fig. 2-13
DISASSEMBLY INSTRUCTIONS
2-14: CAPSTAN DD UNIT (Refer to Fig. 2-14-A)
1.
Remove the Capstan Belt.
2.
Remove the 3 screws 1.
3.
Remove the Capstan DD Unit.
Capstan Belt
Capstan DD Unit
1
1
1
• Screw Torque: 4 ± 0.5kgf•cm
Fig. 2-14-A
NOTE
1. In case of the Capstan DD Unit installation, apply the
silicon bond (TSE3843-W) on the position Fig. 2-14-B
correctly. (If no silicon bond applied, abnormal noise will
be heard on the deck operation.)
(Refer to Fig. 2-14-B, C)
Applied position of
silicon bond
Part Name: TSE3843-W
Part No.: Y118011000
2-15: MAIN CAM/PINCH ROLLER CAM/JOINT GEAR
(Refer to Fig. 2-15-A)
1.2.Remove the E-Ring 1, then remove the Main Cam.
Remove the E-Ring 2, then remove the Pinch Roller
Cam and Joint Gear.
1
Main Cam
2
Pinch Roller Cam
Joint Gear
Fig. 2-15-A
NOTE
1. In case of the Pinch Roller Cam and Main Cam installation, install them as the circled section of Fig. 2-15-B so
that the each markers are met. (Refer to Fig. 2-15-B)
And also can be seen the Main Chassis hole through the
Main Cam maker hole.
Pinch Roller Cam
Marker
Main Cam
Be careful not to apply the silicon
bond to the Pinch Roller.
Capstan DD Unit
Silicon Bond
Main Chassis
Fig. 2-14-B
Fig. 2-14-C
2-16: LOADING GEAR S/T UNIT (Refer to Fig. 2-16-A)
1.2.Remove the E-Ring 1 and remove the Main Loading
Gear.
Remove the Main Rod, Tension Lever, Loading Arm S
Unit and Loading Arm T Unit.
1
Main Rod
Tension Lever
Main Loading Gear
Loading Arm S Unit
B2-5
Fig. 2-15-B
Loading Arm T Unit
Fig. 2-16-A
DISASSEMBLY INSTRUCTIONS
NOTE
1. When you install the Loading Arm S Unit, Loading Arm T
Unit and Main Loading Gear, align each marker. (Refer
to Fig. 2-16-B)
Marker
Main Loading Gear
Marker
Loading Arm T UnitLoading Arm S Unit
Fig. 2-16-B
2-17: CLUTCH ASS’Y/RING SPRING/CLUTCH LEVER/
CLUTCH GEAR (Refer to Fig. 2-17-A)
1.
Remove the Polyslider Washer 1.
2.
Remove the Clutch Ass’y and Ring Spring.
3.
Remove the Clutch Lever.
4.
Remove the Coupling Gear, Coupling Spring and Clutch
Gear.
2-18:
CASSETTE GUIDE POST/INCLINED BASE S/T
UNIT/P4 CAP/LED REFLECTOR
(Refer to Fig. 2-18-A)
Remove the P4 Cap.
1.
Unlock the support 1 and remove the Cassette Guide
2.
Post.
Remove the Inclined Base S/T Unit.
3.
Remove the screw 2.
4.
Remove the LED Reflector.
5.
1
Inclined Base S Unit
LED Reflector
Cassette Guide Post
Inclined Base T Unit
P4 Cap
1
Clutch Ass’y
Ring Spring
Coupling Gear
Coupling Spring
Clutch Gear
Clutch Lever
Fig. 2-17-A
NOTE
1. In case of the Clutch Ass’y installation, install it with
inserting the spring of the Clutch Ass’y into the dent of the
Coupling Gear. (Refer to Fig. 2-17-B)
Clutch Ass’y
2
Fig. 2-18-A
NOTE
1.
Do not touch the roller of Guide Roller.
2.
In case of the P4 Cap installation, install it with parallel
for “A” and “B” of Fig. 2-18-B.
3.
In case of the Cassette Guide Post installation, install
correctly as the circled section of Fig. 2-18-C.
“A”“B”
P4 Cap
Cassette Opener
Fig. 2-18-B
[OK]
Cassette Guide Post
Coupling Gear
Fig. 2-17-B
[NG]
Cassette Guide Post
Fig. 2-18-C
B2-6
DISASSEMBLY INSTRUCTIONS
3. REMOVAL OF ANODE CAP
Read the following NOTED items before starting work.
After turning the power off there might still be a potential
*
voltage that is very dangerous. When removing the
Anode Cap, make sure to discharge the Anode Cap's
potential voltage.
*
Do not use pliers to loosen or tighten the Anode Cap
terminal, this may cause the spring to be damaged.
REMOVAL
1. Follow the steps as follows to discharge the Anode Cap.
(Refer to Fig. 3-1.)
Connect one end of an Alligator Clip to the metal part of a
flat-blade screwdriver and the other end to ground.
While holding the plastic part of the insulated Screwdriver,
touch the support of the Anode with the tip of the
Screwdriver.
A cracking noise will be heard as the voltage is discharged.
GND on the CRT
3. After one side is removed, pull in the opposite direction to
remove the other.
NOTE
Take care not to damage the Rubber Cap.
INSTALLATION
1. Clean the spot where the cap was located with a small
amount of alcohol. (Refer to Fig. 3-3.)
NOTE
Confirm that there is no dirt, dust, etc. at the spot where
the cap was located.
Location of Anode Cap
Fig. 3-3
Screwdriver
Alligator Clip
GND on the CRT
Flip up the sides of the Rubber Cap in the direction of the
2.
arrow and remove one side of the support.
(Refer to Fig. 3-2.)
Rubber Cap
Support
CRT
Fig. 3-1
2.3.Arrange the wire of the Anode Cap and make sure the
wire is not twisted.
Turn over the Rubber Cap. (Refer to Fig. 3-4.)
Fig. 3-4
4. Insert one end of the Anode Support into the anode button,
then the other as shown in Fig. 3-5.
CRT
Support
Fig. 3-2
Support
CRT
5.6.Confirm that the Support is securely connected.
Put on the Rubber Cap without moving any parts.
B3-1
Fig. 3-5
DISASSEMBLY INSTRUCTIONS
4. REMOVAL AND INSTALLATION OF FLAT
PACKAGE IC
REMOVAL
1. Put the Masking Tape (cotton tape) around the Flat
Package IC to protect other parts from any damage.
(Refer to Fig. 4-1.)
NOTE
Masking is carried out on all the parts located within
10 mm distance from IC leads.
Masking Tape
(Cotton Tape)
2. Heat the IC leads using a blower type IC desoldering
machine. (Refer to Fig. 4-2.)
NOTE
Do not add the rotating and the back and forth directions force on the IC, until IC can move back and forth
easily after desoldering the IC leads completely.
IC
Fig. 4-1
Blower type IC
desoldering machine
3. When IC starts moving back and forth easily after
desoldering completely, pickup the corner of the IC using
a tweezers and remove the IC by moving with the IC
desoldering machine. (Refer to Fig. 4-3.)
NOTE
Some ICs on the PCB are affixed with glue, so be
careful not to break or damage the foil of each IC
leads or solder lands under the IC when removing it.
Blower type IC
desoldering machine
Tweezers
IC
4.5.Peel off the Masking Tape.
Absorb the solder left on the pattern using the Braided
Shield Wire. (Refer to Fig. 4-4.)
NOTE
Do not move the Braided Shield Wire in the vertical
direction towards the IC pattern.
Fig. 4-3
Braided Shield Wire
Soldering Iron
IC
Fig. 4-2
IC pattern
Fig. 4-4
B4-1
DISASSEMBLY INSTRUCTIONS
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. 4-5.)
Soldering Iron
Solder temporarily
Solder temporarily
Fig. 4-5
2. Supply the solder from the upper position of IC leads
sliding to the lower position of the IC leads.
(Refer to Fig. 4-6.)
4. When bridge-soldering between terminals and/or the
soldering amount are not enough, resolder using a Thintip Soldering Iron. (Refer to Fig. 4-8.)
IC
Thin-tip Soldering Iron
Fig. 4-8
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, always be sure to replace the IC in this
case.
Solder
IC
Supply soldering
from upper position
to lower position
Soldering Iron
Fig. 4-6
3. Absorb the solder left on the lead using the Braided
Shield Wire. (Refer to Fig. 4-7.)
NOTE
Do not absorb the solder to excess.
Soldering Iron
IC
Braided Shield Wire
Fig. 4-7
B4-2
A
A/C
ACC
AE
AFC
AFT
AFT DET
AGC
AMP
ANT
A.PB
APC
ASS'Y
AT
AUTO
A/V
B
BGP
BOT
BPF
BRAKE SOL
BUFF
B/W
C
C
CASE
CAP
CARR
CH
CLK
CLOCK (SY-SE)
COMB
CONV
CPM
CTL
CYL
CYL-M
CYL SENS
D
DATA (SY-CE)
dB
DC
DD Unit
DEMOD
DET
DEV
E
E
EF
EMPH
ENC
ENV
EOT
EQ
EXT
F
F
FBC
FE
FF
FG
FL SW
FM
FSC
FWD
G
GEN
GND
KEY TO ABBREVIATIONS
:
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, Flip-flop
:
Frequency Generator
:
Front Loading Switch
:
Frequency Modulation
:
Frequency Sub Carrier
:
Forward
:
Generator
:
Ground
H
H.P.F
H.SW
Hz
I
IC
IF
IND
INV
K
KIL
L
L
LED
LIMIT AMP
LM, LDM
LP
L.P.F
LUMI.
M
M
MAX
MINI
MIX
MM
MOD
MPX
MS SW
N
NC
NR
O
OSC
OPE
P
PB
PB CTL
PB-C
PB-Y
PCB
P. CON
PD
PG
P-P
R
R
REC
REC-C
REC-Y
REEL BRK
REEL S
REF
REG
REW
REV, RVS
RF
RMC
RY
S
S. CLK
S. COM
S. DATA
SEG
SEL
SENS
SER
SI
SIF
SO
SOL
SP
:
High Pass Filter
:
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
C1-1
S
STB
SW
SYNC
SYNC SEP
T
TR
TRAC
TRICK PB
TP
U
UNREG
V
V
VCO
VIF
VP
V.PB
VR
V.REC
VSF
VSR
VSS
V-SYNC
VT
X
X'TAL
Y
Y/C
KEY TO ABBREVIATIONS
:
Serial Strobe
:
Switch
:
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
SERVICE MODE LIST
This unit provided with the following SERVICE MODES so you can repair, examine and adjust easily.
To enter SERVICE MODE, unplug AC cord till lost actual clock time. Then press and hold Vol (-) button of main unit and remocon
key simultaneously.
The both pressing of set key and remote control key will not be possible if clock has been set. To reset clock, either unplug AC
cord and allow at least 5 seconds before Power On.
Set KeyRemocon KeyOperations
VOL. (-) MIN
VOL. (-) MIN1
VOL. (-) MIN2
VOL. (-) MIN
VOL. (-) MIN4
VOL. (-) MIN
VOL. (-) MIN
0
3
5
6
Releasing of V-CHIP PASSWORD.
Initialization of the factory.
NOTE:
Horizontal position adjustment of OSD.
NOTE: Also can be adjusted by using the Adjustment MENU.
Refer to the "ELECTRICAL ADJUSTMENT" (OSD HORIZONTAL).
Adjust the PG SHIFTER automatically.
Refer to the "ELECTRICAL ADJUSTMENT" (PG SHIFTER).
Adjust the PG SHIFTER manually.
Adjusting of the Tracking to the center position.
POWER ON total hours and PLAY/REC total hours are displayed on the screen.
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".
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, the POWER ON total hours, and PLAY/REC
total hours.
VOL. (-) MIN9
MethodOperations
Make the short circuit between
the test point of SERVICE and
the GND.
Display of the Adjustment MENU on the screen.
Refer to the "ELECTRICAL ADJUSTMENT" (On-Screen Display Adjustment).
The BOT, EOT, and the Reel Sensor do not work and the deck can be operated
without a cassette tape.
Refer to the "PREPARATION FOR SERVICING"
C2-1
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.
Time
Parts Name
Audio Control Head
Full Erase Head
(Recorder only)
Capstan Belt
Pinch Roller
Capstan DD Unit
Loading Motor
Tension Band
T Brake Band
Clutch Ass’y
Idler Arm Ass’y
Capstan Shaft
Tape Running
Guide Post
Cylinder Unit
: Clean
: Check it and if necessary, replace it.
500
hours
1,000
hours
1,500
hours
2,000
hours
2,500
hours
Notes
Clean those parts in
contact with the tape.
Clean the rubber, and parts
which the rubber touches.
Replace when rolling
becomes abnormal.
Clean the Head
CONFIRMATION OF HOURS USED
POWER ON total hours and 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".
The confirmation of using hours will not be possible if clock has been set. To reset clock, either unplug AC cord
and allow at least 5 seconds before Power On.
1.
Set the VOLUME to minimum.
2.
Press both VOL. DOWN button on the set and Channel button (6) on the remote control for more than 2 seconds.
3.
After the confirmation of using hours, turn off the power.
INIT 00 08
POWER ON 0010
PLAY/REC 0003
(16 x 16 x 16 x thousands digit value) + (16 x 16 x hundreds digit value) + (16 x tens digit value) + (ones digit value)
Initial setting content of MEMORY IC.
POWER ON total hours.
PLAY/REC total hours.
C3-1
PREVENTIVE CHECKS AND SERVICE INTERVALS
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.)
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.
Audio Control Head
Cylinder Head
C3-2
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.
NOTE: No need setting for after INI 3F due to the adjustment value.
+0+1+2+3+4+5+6+7+8+9
080A706BC2B324A9502C
10
B29293001130250882
9A
063A01255460233BDA D7
20000000000038
+A
+B+C+D+E+FINI
40A61A40001000
A90F94450614
8808889888060000000030000000000000
Table 1
Enter DATA SET mode by setting VOLUME to minimum.
1.
Press both VOL. DOWN button on the set and Channel button (6) on the remote control for more than 2 seconds.
2.
ADDRESS and DATA should appear as FIG 1.
ADDRESS DATA
INIT 00 08
POWER ON 0010
PLAY/REC 0003
Fig. 1
3.
ADDRESS is now selected and should "blink". Using the VOL. +/- button on the remote, step through the ADDRESS until
required ADDRESS to be changed is reached.
4.
Press ENTER to select DATA. When DATA is selected, it will "blink".
5.
Again, step through the DATA using VOL. +/- button until required DATA value has been selected.
6.
Pressing ENTER will take you back to ADDRESS for further selection if necessary.
7.
Repeat steps 3 to 6 until all data has been checked.
8.
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.
9.
Turn POWER on.
10.
Press both VOL. DOWN button on the set and Channel button (1) on the remote control for more than 2 seconds.
11.
After the finishing of the initializing of shipping, the unit will turn off automatically.
The unit will now have the correct DATA for the new MEMORY IC.
VSR Torque, Brake Torque (S Reel/T Reel Ass'y)
Brake Torque (T Reel Ass'y)
VSR Torque, Brake Torque (S Reel)
PREPARATION FOR SERVICING
How to use the Servicing Fixture
1.
Remove the Syscon PCB from the set.
Be sure to place the parts on a paper so that they have no short-circuit each other.
2.
Short circuit between TP1001 and Ground with the cable JG154.
(The BOT, EOT, and the Reel Sensor do not work and the deck can be operated without a cassette tape.)
3.
In case of using a cassette tape, press the STOP/EJECT button to insert or eject a cassette tape.
Turn on the power and re-check the cable before checking the trouble points.
D1-1
MECHANICAL ADJUSTMENTS
1. CONFIRMATION AND ADJUSTMENT
Read the following NOTES before starting work.
• Place an object which weighs between 450g~500g on the
Cassette Tape to keep it steady when you want to make
the tape run without the Cassette Holder. (Do not place an
object which weighs over 500g.)
CONFIRMATION AND ADJUSTMENT OF REEL
1-1:
DISK HEIGHT
1.
Turn on the power and set to the STOP mode.
2.
Set the master plane (JG022) and reel disk height
adjustment jig (JG024A) on the mechanism framework,
taking care not to scratch the drum, as shown in Fig. 1-1-A.
3.
While turning the reel and confirm the following points.
Check if the surface "A" of reel disk is lower than the
surface "B" of reel disk height adjustment jig (JG024A)
and is higher than the surface "C". If it is not passed,
place the height adjustment washers and adjust to 10(+2,
-0)mm.
4.
Adjust the other reel in the same way.
Master Plane (JG022)
Reel Disk Height Adjustment Jig
(JG024A)
1-2: CONFIRMATION AND ADJUSTMENT OF TENSION
POST POSITION
1.
Set to the PLAY mode.
2.
Adjust the adjusting section for the Tension Arm position
so that the Tension Arm top is within the standard line of
Main Chassis.
3.
While turning the S Reel clockwise, confirm that the edge
of the Tension Arm is located in the position described
above.
Standard line of Main Chassis
Tension Arm
0.5mm (Adjusting range)
Adjusting section for the
Tension Arm position
Tension Band
Fig. 1-2-A
Master Plane (JG022)
10(+0.2, -0)mm
Reel Disk
Height Adjustment
Washer
2.6x4.7xT0.13
2.6X4.7xT0.25
Reel Disk Height
Adjustment Jig
(JG024A)
(B)
(A)
Fig. 1-1-A
(C)
Fig. 1-1-B
The Tension Arm top will
move to the inside direction
of the Main Chassis.
Bend
The Tension Arm top will
move to the outside direction
of the Main Chassis.
Fig. 1-2-B
1-3: CONFIRMATION OF PLAYBACK TORQUE AND
BACK TENSION TORQUE DURING PLAYBACK
Load a video tape (T-120) recorded in standard speed
1.
mode. Set the unit to the PLAY mode.
Install the tentelometer (JG185) as shown in Fig. 1-3.
2.
Confirm that the meter indicates 20 ± 2gf in the beginning
of playback.
• USING A CASSETTE TYPE TORQUE TAPE (KT-300NR)
1.
After confirmation and adjustment of Tension Post
position (Refer to item 1-2), load the cassette type torque
tape (KT-300NR) and set to the PLAY mode.
2.
Confirm that the right meter of the torque tape indicates
50~90gf•cm during playback in SP mode.
3.
Confirm that the left meter of the torque tape indicates
25~40gf•cm during playback in SP mode.
Tentelometer
(JG185)
Video Tape
D2-1
P1 Post
Guide Roller
Fig. 1-3
MECHANICAL ADJUSTMENTS
1-4: CONFIRMATION OF VSR TORQUE
Install the Torque Gauge (JG002F) and Adapter (JG002B)
1.
on the S Reel. Set to the Picture Search (Rewind) mode.
(Refer to Fig.1-4-B)
Then, confirm that it indicates 120~180gf•cm.
2.
NOTE
Install the Torque Gauge on the reel disk firmly. Press the
REW button to turn the reel disk.
1-5: CONFIRMATION OF REEL BRAKE TORQUE
(S Reel Brake) (Refer to Fig. 1-4-B)
Once set to the Fast Forward mode then set to the Stop
1.
mode. While, unplug the AC cord when the Pinch Roller
Block is on the position of Fig. 1-4-A.
Move the Idler Ass'y from the S Reel.
2.
Install the Torque Gauge (JG002F) and Adapter
3.
(JG002B) on the S Reel. Turn the Torque Gauge
(JG002F) clockwise.
Then, confirm that it indicates 60~100gf•cm.
4.
(T Reel Brake) (Refer to Fig. 1-4-B)
Once set to the Fast Forward mode then set to the Stop
1.
mode. While, unplug the AC cord when the Pinch Roller
Block is on the position of Fig. 1-4-A.
Move the Idler Ass'y from the T Reel.
2.
Install the Torque Gauge (JG002E) and Adapter
3.
(JG002B) on the T reel. Turn the Torque Gauge
(JG002E) counterclockwise.
Then, confirm that it indicates 30~50gf•cm.
4.
The position at FF mode.
Pinch Roller Block
Stop at this position.
Cassette
The position at
STOP mode.
Capstan DD Unit
Cassette Holder Ass'y
Opener
Fig. 1-4-A
Torque Gauge/Adapter
(JG002F/JG002B)
Torque Gauge/Adapter
(JG002E/JG002B)
NOTE
If the torque is out of the range, replace the following parts.
Check item
1-4
1-5
S Reel side:
Replacement Part
Idler Ass'y/Clutch Ass'y
S Reel/Tension Band/Tension
Connect/Tension Arm Ass'y
T Reel side:
T Reel/T Brake Band//T Brake
Spring/T Brake Arm
2. CONFIRMATION AND ADJUSTMENT
OF TAPE RUNNING MECHANISM
Tape Running Mechanism is adjusted precisely at the
factory. Adjustment is not necessary as usual. When you
replace the parts of the tape running mechanism because of
long term usage or failure, the confirmation and adjustment
are necessary.
2-1: GUIDE ROLLER
Playback the VHS Alignment Tape.
1.
Connect CH-1 of the oscilloscope to TP4001(Envelope)
2.
and CH-2 to TP1002 (SW Pulse).
Press both VOL. DOWN button on the set and the
3.
Channel button (5) on the remote control simultaneously.
Trigger with SW Pulse and observe the envelope. (Refer
4.
to Fig. 2-1-A)
When observing the envelope, adjust the Taper Nut Driver
5.
slightly until the envelope will be flat.
Even if you press the Tracking Button, adjust so that
flatness is not moved so much.
Adjust so that the A : B ratio is better than 3 : 2 as shown
6.
in Fig. 2-1-B, even if you press the Tracking Button to
move the envelope (The envelope waveform will begin to
decrease when you press the Tracking Button).
Adjust the PG shifter during playback.
7.
(Refer to the ELECTRICAL ADJUSTMENTS)
NOTE
After adjustment, confirm and adjust A/C head.
(Refer to item 2-2)
CH-1
Envelope
(TP4001)
CH-1
CH-2
Track
CH-2
SW Pulse (TP1002)
Track
S Reel
T Reel
Fig. 1-4-B
D2-2
Max
Entrance
A
B
A : B ≥ 3 : 2
Fig. 2-1-A
Exit
Max
Fig. 2-1-B
MECHANICAL ADJUSTMENTS
2-2:
CONFIRMATION AND ADJUSTMENT OF AUDIO/
CONTROL HEAD
When the Tape Running Mechanism does not work well,
adjust the following items.
1.
Playback the VHS Alignment Tape.
2.
Confirm that the reflected picture of stamp mark is
appeared on the tape prior to P4 Cap as shown in Fig. 2-2-A.
When the reflected picture is distorted, turn the screw
a)
1 clockwise until the distortion is disappeared.
When the reflected picture is not distorted, turn the
b)
screw 1 counterclockwise until little distortion is
appeared, then adjust the a).
3.
Turn the screw 2 to set the audio level to maximum.
4.
Confirm that the bottom of the Audio/ Control Head and
the bottom of the tape is shown in Fig. 2-2-C.
When the height is not correct, turn the screw 3 to
c)
adjust the height. Then, adjust the 1~3 again.
Audio/Control Head
Reflected picture of
Stamp Mark
P4 Cap
2-3: TAPE RUNNING ADJUSTMENT
(X VALUE ADJUSTMENT)
Confirm and adjust the height of the Reel Disk.
1.
(Refer to item 1-1)
Confirm and adjust the position of the Tension Post.
2.
(Refer to item 1-2)
Adjust the Guide Roller. (Refer to item 2-1)
3.
Confirm and adjust the Audio/Control Head.
4.
(Refer to item 2-2)
Connect the connector of AV Jack Jig (JG180) to
5.
CP1003.
Connect CH-1 of the oscilloscope to TP1002, CH-2 to
6.
TP4001 and CH-3 to Hot side of JG180 Audio out Jack.
Playback the VHS Alignment Tape.
7.
Press both VOL. DOWN button on the set and the
8.
Channel button (5) on the remote control simultaneously.
Set the X Value adjustment driver (JG153) to the 4 of
9.
Fig. 2-2-B. Adjust X value so that the envelope waveform
output becomes maximum. Check if the relation between
Audio and Envelope waveform becomes (1) or (2) of Fig.2-3.
Envelope
Audio/Control Head
3
2
Audio/Control Head
Tape
Stamp Mark
(1)
CH-3
Audio
(2)
Fig. 2-3
Fig. 2-2-A
1
4
Fig. 2-2-B
0.25±0.05mm
Fig. 2-2-C
D2-3
MECHANICAL ADJUSTMENTS
3. MECHANISM ADJUSTMENT PARTS LOCATION GUIDE
3
4
5
6
2
1
8910
1. Tension Connect
2. Tension Arm
3. Guide Roller
4. Audio/Control Head
5. X value adjustment driver hole
6.
P4 Post
7.
T Brake Spring
8.
T Reel
9.
S Reel
10.
Adjusting section for the Tension Arm position
7
D2-4
ELECTRICAL ADJUSTMENTS
1. BEFORE MAKING ELECTRICAL
ADJUSTMENTS
Read and perform these adjustments when repairing the
circuits or replacing electrical parts or PCB assemblies.
CAUTION
•
Use an isolation transformer when performing any
service on this chassis.
•
Before removing the anode cap, discharge electricity
because it contains high voltage.
•
When removing a PCB or related component, after
unfastening or changing a wire, be sure to put the wire
back in its original position.
•
When you exchange IC and Transistor for a heat sink,
apply the silicon grease on the contact section of the
heat sink. Before applying new silicon grease, remove all
the old silicon grease. (Old grease may cause damages
to the IC and Transistor.)
Prepare the following measurement tools for electrical
adjustments.
Oscilloscope
1.
Digital Voltmeter
2.
On-Screen Display Adjustment
Unplug the AC plug for more than 5 seconds to set the
1.
clock to the non-setting state. Then, set the volume
level to minimum.
Press both VOL. DOWN button on the set and the
2.
Channel button (9) on the remote control for more than
2 seconds to appear the adjustment mode on the
screen as shown in Fig. 1-1.
FUNCTION
NO.
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
OSD H
CUT OFF
RF AGC
V.VCO
H.VCO
H.PHAS
V.SIZE
V.SFT
R.DRV
B.DRV
R CUT OFF
G CUT OFF
B CUT OFF
BRI.CENT
BRI.MAX
BRI.MIN
Connect the connector of AV Jack Jig (JG180) to
CP1003.
2.
Connect CH-1 on the oscilloscope to TP1002 and CH-2
to Hot side of JG180 Video out Jack.
3.
Playback the alignment tape.
4.
Press both VOL.DOWN button on the set and the
Channel button (5) on the remote control simultaneously
to set tracking to center.
5.
Press the VOL. DOWN button on the set and the
channel button (3) on the remote control simultaneously
until the indicator REC disappears. If the indicator REC
disappears, adjustment is completed.
TV
00 OSD 16
Use the Channel UP/DOWN button or Channel button
3.
(0-9) on the remote control to select the options shown
in Fig. 1-2.
Press the MENU button on the remote control to end
4.
the adjustments.
Fig. 1-1
(If the above adjustments doesn't work well:)
6.
Press the VOL. DOWN button on the set and the
channel button (3) on the remote control simultaneously
until the indicator REC disappears.
7.
When the REC indicator is blinking, press both VOL.
DOWN button on the set and the channel button (4) on
the remote control simultaneously and adjust the
8.
Tracking +/- button until the arising to the down of Head
Switching Pulse becomes 6.5 ± 0.5H.
(Refer to Fig. 2-1-A, B)
9.
Press the Tracking Auto button.
CH-2
6.5H
CH-1
Fig. 2-1-A
D3-1
ELECTRICAL ADJUSTMENTS
CH-2
CH-1
6.5H
Fig. 2-1-B
2-2: VCO FREERUN
1.
Receive the VHF HIGH (63dB).
2.
Place the set with Aging Test for more than 10 minutes.
3.
Connect the digital voltmeter between the pin 5 ofCP351 and the pin 1 (GND) of CP351.
4.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (03) on the remote control to
select "V.VCO".
5.
Press the VOL. UP/DOWN button on the remote control
until the digital voltmeter is 2.5V.
6.
After the 2.5V adjustment, countdown the VIF VCO step
No. by 1 step with the VOL. DOWN button.
2-3: RF AGC
1.
Receive the VHF HIGH (63 ± 1dB).
2.
Connect the digital voltmeter between the pin 5 ofCP351 and the pin 1 (GND) of CP351.
3.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (02) on the remote control to
select "RF AGC".
4.
Press the VOL. UP/DOWN button on the remote control
until the digital voltmeter is 2.7 ± 0.05V.
(TV SECTION)
2-4: CONSTANT VOLTAGE
1.
Using the remote control, set the brightness and contrast
to normal position.
2.
Connect the digital voltmeter to TP601 (R520).
3.
Set condition is AV MODE without signal.
4.
Adjust the VR502 until the digital voltage is 135 ± 0.5V.
2-5: CUT OFF
1.
Adjust the unit to the following settings.
R CUT OFF=127, G CUT OFF=127, B CUT OFF=127,
SUB BRI.CENT=127, SUB CONT.MAX=70
2.
Place the set with Aging Test for more than 15 minutes.
3.
Set condition is AV MODE without signal.
4.
Using the remote control, set the brightness and
contrast to normal position.
5.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (01) on the remote control to
select "CUT OFF".
6.
Adjust the Screen Volume until a dim raster is obtained.
2-6: WHITE BALANCE
NOTE: Adjust after performing CUT OFF adjustment.
1.
Place the set with Aging Test for more than 10 minutes.
2.
Receive the gray scale pattern.
3.
Using the remote control, set the brightness and
contrast to normal position.
4.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (10) on the remote control to
select "R CUT OFF".
5.
Using the VOL. UP/DOWN button on the remote
control, adjust the R CUT OFF.
6.
Press the CH. UP/DOWN button on the remote control
to select the "R DRIVE", "B DRIVE", "G CUT OFF" or
"B CUT OFF".
7.
Adjust the VOL. UP/DOWN button on the remote
control, adjust the R DRIVE, B DRIVE, G CUT OFF or
B CUT OFF at each step tone sections equally.
8.
Perform the above adjustments 6 and 7 until the white
color is looked like a white.
2-7: FOCUS
1.
Receive the monoscope pattern.
2.
Using the remote control, set the brightness and
contrast to normal position.
3.
Turn the Focus Volume fully counterclockwise once.
4.
Adjust the Focus Volume until picture is distinct.
2-8: HORIZONTAL PHASE
1.
Receive the monoscope pattern.
2.
Using the remote control, set the brightness and
contrast to normal position.
3.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (05) on the remote control to
select "H PHAS".
4.
Press the VOL. UP/DOWN button on the remote control
until the SHIFT quantity of the OVER SCAN on right
and left becomes minimum.
2-9: VERTICAL SHIFT
1.
Receive the monoscope pattern.
2.
Using the remote control, set the brightness and
contrast to normal position.
3.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (07) on the remote control to
select "V SFT".
4.
Check if the step No. V. SHIFT is "03".
5.
Adjust the VR401 until the horizontal line becomes fit to
the notch of the shadow mask.
2-10: VERTICAL SIZE
1.
Receive the monoscope pattern.
2.
Using the remote control, set the brightness and
contrast to normal position.
3.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (06) on the remote control to
select "V SIZE".
4.
Press the VOL. UP/DOWN button on the remote
control until the SHIFT quantity of the OVER SCAN
on upside and downside becomes 10 ± 2%.
D3-2
ELECTRICAL ADJUSTMENTS
2-11: SUB BRIGHTNESS
1.
Receive the monoscope pattern. (RF Input)
2.
Using the remote control, set the brightness and
contrast to normal position.
3.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (13) on the remote control to
select "BRI.CENT".
4.
Press the VOL. UP/DOWN button on the remote
control until the white 10% is starting to be visible.
5.
Receive the monoscope pattern. (Audio Video Input)
6.
Press the INPUT SELECT button on the remote control
to set to the AV mode. Then perform the above
adjustments 2~4.
2-12: SUB CONTRAST MAX
1.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (17) on the remote control to
select "CONT.MAX".
2.
Press the VOL. UP/DOWN button on the remote
control until the contrast step No. becomes "72".
3.
Receive a broadcast and check if the picture is normal.
4.
Press the INPUT SELECT button on the remote control
to set to the AV mode.
5.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (17) on the remote control to
select "CONT.MAX".
6.
Press the VOL. UP/DOWN button on the remote
control until the contrast step No. becomes "75".
7.
Receive a broadcast and check if the picture is normal.
2-14: SUB COLOR
1.
Receive the color bar pattern. (RF Input)
2.
Using the remote control, set the brightness, contrast,
color and tint to normal position.
3.
Connect the oscilloscope to TP803.
4.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (19) on the remote control to
select "COL.CENT".
5.
Adjust the VOLTS RANGE VARIABLE knob of the
oscilloscope until the range between white 100% and
0% is set to 4 scales on the screen of the oscilloscope.
6.
Press the VOL. UP/DOWN button on the remote control
until the red color level is adjusted to 110 ± 10% of the
white level. (Refer to Fig. 2-3)
7.
Receive the color bar pattern. (Audio Video Input)
8.
Press the INPUT SELECT button on the remote control
to set to the AV mode. Then perform the above
adjustments 2~6.
White 0%
100%
2-13: SUB TINT
1.
Receive the color bar pattern. (RF Input)
2.
Using the remote control, set the brightness, contrast,
color and tint to normal position.
3.
Connect the oscilloscope to TP801.
4.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (22) on the remote control to
select "TINT".
5.
Press the VOL. UP/DOWN button on the remote control
until the section "A" becomes a straight line.
(Refer to Fig. 2-2)
6.
Receive the color bar pattern. (Audio Video Input)
7.
Press the INPUT SELECT button on the remote control
to set to the AV mode. Then perform the above
adjustments 2~5.
"A"
Fig. 2-2
White 100%
2-15: OSD HORIZONTAL
1.2.Activate the adjustment mode display of Fig. 1-1.
Press the VOL. UP/DOWN button on the remote control
until the difference of A and B becomes minimum.
(Refer to Fig. 2-4)
00 OSD 16
A
Red Level
TV
Fig. 2-3
B
Fig. 2-4
D3-3
ELECTRICAL ADJUSTMENTS
2-16: Confirmation of Fixed Value (Step No.)
Please check if the fixed values of the each adjustment
items are set correctly referring below.
NO.
FUNCTION
04
H.VCO
14
BRIGHT MAX
15
BRIGHT MIN
16
CONT CENT
18
CONT MIN
20
COLOR MAX
21
COLOR MIN
23
SHARP
24
FM LVL
25
LVL
26
SEP 1
27
SEP 2
28
T MONO
29
T STE
RF
04
150
50
40
20
65
01
37
127
63
15
63
00
00
AV
04
150
50
40
20
65
01
37
127
63
15
63
00
00
D3-4
ELECTRICAL ADJUSTMENTS
3.PURITY AND CONVERGENCE
ADJUSTMENTS
NOTE
1.
Turn the unit on and let it warm up for at least 30
minutes before performing the following adjustments.
2.
Place the CRT surface facing east or west to reduce the
terrestrial magnetism.
3.
Turn ON the unit and demagnetize with a Degauss Coil.
3-1: STATIC CONVERGENCE (ROUGH ADJUSTMENT)
1.
Tighten the screw for the magnet. Refer to the adjusted
CRT for the position. (Refer to Fig. 3-1)
If the deflection yoke and magnet are in one body,
untighten the screw for the body.
2.
Receive the green raster pattern from the color bar
generator.
3.
Slide the deflection yoke until it touches the funnel side
of the CRT.
4.
Adjust center of screen to green, with red and blue on
the sides, using the pair of purity magnets.
5.
Switch the color bar generator from the green raster
pattern to the crosshatch pattern.
6.
Combine red and blue of the 3 color crosshatch pattern
on the center of the screen by adjusting the pair of 4
pole magnets.
7.
Combine red/blue (magenta) and green by adjusting the
pair of 6 pole magnets.
8.
Adjust the crosshatch pattern to change to white by
repeating steps 6 and 7.
3-2: PURITY
NOTE
Adjust after performing adjustments in section 3-1.
1.
Receive the green raster pattern from color bar
generator.
2.
Adjust the pair of purity magnets to center the color on
the screen.
Adjust the pair of purity magnets so the color at the
ends are equally wide.
3.
Move the deflection yoke backward (to neck side)
slowly, and stop it at the position when the whole screen
is green.
4.
Confirm red and blue colors.
5.
Adjust the slant of the deflection yoke while watching
the screen, then tighten the fixing screw.
103BZ710466752WSA0230SHIELD,CASE HEAD AMP
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105BZ710331753WUAA006SPRING,EARTH HEAD AMP
106AD301656761WPA0236HOLDER,DECK
107BZ71049885OP700038HOLDER,END SENSOR
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111AD3001327230006818SHEET,CAUTION
112BZ710660741WUA0021SPRING,EARTH
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114BZ710260899HV3T000HOLDER,ANODE WIRE
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117AD301669792WHA0412PACKAGE,TOP
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120AE004208A5L808V975INSTRUCTION BOOK KIT
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124AE002695JB5UD100POLYBAG,INSTRUCTION(RED CAUTION)
300AD301674A5E201A420KDECK ASS'YA5E201A420K
301AE00275485OA400240PINCH ROLLER BLOCK (VA)
302BZ71051485OP900746BRACKET,TOP 3V
303BZ71019385OP200290BELT,CAPSTAN (S)
304BZ71051585OP600581WORM
305BZ71009485OP500083BASE,AC HEAD
306BZ71011285OP800324SPRING,AC HEAD
307BZ71051685OA000459MAIN CHASSIS ASS'Y
308BZ71051785OA200089CLUTCH ASS'Y
309BZ71051885OA200090ARM IDLER ASS'Y
310BZ71051985OA300065LOADING ARM S UNIT
311BZ71052085OA300066LOADING ARM T UNIT
312BZ71052185OA400223INCLINED BASE T UINT 3S
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314BZ71065085OA400235TENSION ARM ASS'Y 2
315BZ71052485OA400231INCLINED BASE S UNIT
316AE00044285OP800367SPRING,LOCKER
317BZ71052685OP900736CASS,HOLDER
318BZ71052785OP900748CASS,SIDE L
319BZ71052885OP900749CASS,SIDE R
320BZ71052985OP900739LOCKER,R
321BZ71053085OA900228LINK UNIT
322BZ71053185OP000496POST,CASS GUIDE
323BZ71053285OP200316REEL,S (S)
324BZ71053385OP200317REEL,T (S)
325BZ71053485OP200308GEAR,IDLER
326BZ71053585OP200311GEAR,CLUTCH
327BZ71053685OP200312GEAR,COUPLING
328BZ71053785OP200313LEVER,CLUTCH
329BZ71053885OP300194GEAR,MAIN LOADING
330BZ71009285OP400490LEVER,TENSION
331BZ71009385OP400492HOLDER,TENSION
332BZ71036685OP400520CAP.P4
333BZ71076285OP400542BAND,TENSION
334BZ71054085OP400533CONNECT,TENSION
335BZ71054185OP600573ARM,BRAKE T
336BZ71076385OP600584BAND,BRAKE T
337BZ71054385OP600577CAM,PINCH ROLLER
338BZ71054485OP600578CAM,MAIN
339BZ71054585OP600579ROD,MAIN