HRXV-28-SE
SERVICE MANUAL
DVD PLAYER & VIDEO CASSETTE RECORDER
YD06820055
HR-XV28SEF,HR-XV28SEK,
HR-XV28SER,HR-XV28SEU,
HR-XV28SEY,HR-XV28SEZ
(EK model)
(EU, EY, EZ models)
(EF, ER models)
(EF model)
HR-XV28SEF,HR-XV28SEK,HR-XV28SER,HR-XV28SEU,HR-XV28SEY,HR-XV28SEZ [D5PV0]
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-37
COPYRIGHT © 2005 Victor Company of Japan, Limited
No.YD068
2005/5
SPECIFICATION
HR-XV28SEF HR-XV28SEK HR-XV28SER/SEU/SEY/SEZ
General
Power requirement AC 200V - 240V, 50 Hz
Power consumption 17 W
Dimensions (approx.) 430 × 78.5 × 265 mm (w/h/d)
Mass (approx.) 4.2 kg
Operating temperature 5°C to 35°C (41°F to 95°F)
Operating humidity 5 % to 90 %
Timer 24 hours display type
RF Modulator - UHF 22-68 (Adjustable)
System
Laser Semiconductor laser, wavelength 650 nm
Video Head system Double azimuth 6 heads, helical scanning.
Signal system PAL
Frequency response DVD (PCM 96 kHz): 8 Hz to 44 kHz, DVD (PCM 48 kHz): 8 Hz to 22 kHz, CD: 8 Hz to 20 kHz
Signal-to-noise ratio More than 100 dB (ANALOG OUT connectors only)
Harmonic distortion Less than 0.008%
Dynamic range More than 100 dB (DVD), More than 95 dB (CD)
Inputs (VCR)
Audio -6.0 dBm, more than 10 kΩ (SCART), -6.0 dBm, more than 47 kΩ (RCA)
Video 1.0 V (p-p), 75 Ω, unbalanced (SCART/RCA)
Outputs (DVD)
VIDEO OUT 1 Vp-p 75 Ω, sync negative
Audio output (digital audio) 0.5 V (p-p), 75 Ω, RCA jack × 1
Audio output (analog audio) 2.0 Vrms (1 kHz, 0 dB), 600 Ω, RCA jack (L, R) x 1/SCART (TO TV)
Outputs (VCR/DVD)
Audio -6.0 dBm, less than 1 kΩ (SCART)
Video 1.0 V (p-p), 75 Ω, unbalanced (SCART)
• Designs and specifications are subject to change without notice.
• Manufactured under license from Dolby Laboratories. "Dolby", "Pro Logic" and the double-D symbol are trademarks of Dolby Laboratories.
• DTS and DTS Digital Out are trademarks of Digital Theater Systems, Inc.
• SHOWVIEW is a trademark of Gemstar Development Corporation. The SHOWVIEW system is manufactured under license from
Gemstar Development Corporation.(EF/ER/EU/EY/EZ models)
• VIDEO Plus+ and PlusCode are registered trademarks of Gemstar Development Corporation. The VIDEO Plus+ system is manufactured under license from Gemstar Development Corporation.(EK model)
1-2 (No.YD068)
SECTION 1
r
PRECAUTION
1.1 SAFTY PRECAUTIONS
Prior to shipment from the factory, JVC products are strictly inspected to conform with the recognized product safety and electrical codes of the countries in which they are to be
sold.However,in order to maintain such compliance, it is equally
important to implement the following precautions when a set is
being serviced.
1.1.1 Precautions during Servicing
(1) Locations requiring special caution are denoted by labels
and inscriptions on the cabinet, chassis and certain parts of
the product.When performing service, be sure to read and
comply with these and other cautionary notices appearing
in the operation and service manuals.
(2) Parts identified by the symbol and shaded ( ) parts
are critical for safety.
Replace only with specified part numbers.
NOTE :
Parts in this category also include those specified to
comply with X-ray emission standards for products
using cathode ray tubes and those specified for
compliance with various regulations regarding spurious radiation emission.
(3) Fuse replacement caution notice.
Caution for continued protection against fire hazard.
Replace only with same type and rated fuse(s) as specified.
(4) Use specified internal wiring. Note especially:
• Wires covered with PVC tubing
• Double insulated wires
• High voltage leads
(5) Use specified insulating materials for hazardous live parts.
Note especially:
• Insulation Tape
• PVC tubing
•Spacers
• Insulation sheets for transistors
•Barrier
(6) When replacing AC primary side components (transformers,
power cords, noise blocking capacitors, etc.) wrap ends of
wires securely about the terminals before soldering.
Consequently, when servicing these products, replace the
cathode ray tubes and other parts with only the specified
parts. Under no circumstances attempt to modify these circuits.Unauthorized modification can increase the high voltage value and cause X-ray emission from the cathode ray
tube.
(12) Crimp type wire connectorIn such cases as when replacing
the power transformer in sets where the connections between the power cord and power trans former primary lead
wires are performed using crimp type connectors, if replacing the connectors is unavoidable, in order to prevent safety hazards, perform carefully and precisely according to the
following steps.
• Connector part number :E03830-001
• Required tool : Connector crimping tool of the proper
type which will not damage insulated parts.
• Replacement procedure
a) Remove the old connector by cutting the wires at a
point close to the connector.Important : Do not reuse a connector (discard it).
cut close to connector
Fig.1-1-3
b) Strip about 15 mm of the insulation from the ends
of the wires. If the wires are stranded, twist the
strands to avoid frayed conductors.
15 mm
Fig.1-1-4
c) Align the lengths of the wires to be connected. In-
sert the wires fully into the connector.
Metal sleeve
Fig.1-1-1
(7) Observe that wires do not contact heat producing parts
(heatsinks, oxide metal film resistors, fusible resistors, etc.)
(8) Check that replaced wires do not contact sharp edged or
pointed parts.
(9) When a power cord has been replaced, check that 10-15
kg of force in any direction will not loosen it.
Power cord
Fig.1-1-2
(10) Also check areas surrounding repaired locations.
(11) Products using cathode ray tubes (CRTs)In regard to such
products, the cathode ray tubes themselves, the high voltage circuits, and related circuits are specified for compliance with recognized codes pertaining to X-ray emission.
Connector
Fig.1-1-5
d) As shown in Fig.1-1-6, use the crimping tool to
crimp the metal sleeve at the center position. Be
sure to crimp fully to the complete closure of the
tool.
1.2
5
2
.0
5.5
Crimping tool
Fig.1-1-6
e) Check the four points noted in Fig.1-1-7.
Not easily pulled free
Wire insulation recessed
more than 4 mm
Crimped at approx. cente
of metal sleeve
Conductors extended
Fig.1-1-7
(No.YD068)1-3
1.1.2 Safety Check after Servicing
Examine the area surrounding the repaired location for damage
or deterioration. Observe that screws, parts and wires have been
returned to original positions, Afterwards, perform the following
tests and confirm the specified values in order to verify compliance with safety standards.
(1) Insulation resistance test
Confirm the specified insulation resistance or greater between power cord plug prongs and externally exposed
parts of the set (RF terminals, antenna terminals, video and
audio input and output terminals, microphone jacks, earphone jacks, etc.).See table 1 below.
(2) Dielectric strength test
Confirm specified dielectric strength or greater between
power cord plug prongs and exposed accessible parts of
the set (RF terminals, antenna terminals, video and audio
input and output terminals, microphone jacks, earphone
jacks, etc.). See Fig.1-1-11 below.
(3) Clearance distance
When replacing primary circuit components, confirm specified clearance distance (d), (d') between soldered terminals, and between terminals and surrounding metallic
parts. See Fig.1-1-11 below.
d
Chassis
d'
Power cord
primary wire
Fig.1-1-8
(4) Leakage current test
Confirm specified or lower leakage current between earth
ground/power cord plug prongs and externally exposed accessible parts (RF terminals, antenna terminals, video and
audio input and output terminals, microphone jacks, earphone jacks, etc.).
Measuring Method : (Power ON)Insert load Z between
earth ground/power cord plug prongs and externally exposed accessible parts. Use an AC voltmeter to measure
across both terminals of load Z. See Fig.1-1-9 and following Fig.1-1-12.
ab
Externally
exposed
accessible part
Z
V
c
A
Fig.1-1-9
(5) Grounding (Class 1 model only)
Confirm specified or lower grounding impedance between
earth pin in AC inlet and externally exposed accessible
parts (Video in, Video out, Audio in, Audio out or Fixing
screw etc.).Measuring Method:
Connect milli ohm meter between earth pin in AC inlet and
exposed accessible parts. See Fig.1-1-10 and grounding
specifications.
AC inlet
Earth pin
Exposed accessible part
MIlli ohm meter
Grounding Specifications
Region
USA & Canada
Europe & Australia
Grounding Impedance (Z
Z 0.1 ohm
Z 0.5 ohm
)
Fig.1-1-10
AC Line Voltage
100 V
100 to 240 V
110 to 130 V
110 to 130 V
200 to 240 V
Region
Japan
USA & Canada
Europe & Australia
Insulation Resistance (R
R 1 M /500 V DC
1 M R 12 M /500 V DC
R 10 M /500 V DC
)
Dielectric Strength
AC 1 kV 1 minute
AC 1.5 kV 1 minute
AC 1 kV 1 minute
AC 3 kV 1 minute
AC 1.5 kV 1 minute
(
Class
(
Class
Clearance Distance (d), (d'
d, d' 3 mm
d, d' 4 mm
d, d' 3.2 mm
d 4 m m
)
d' 8 m m (Power cord
d' 6 m m (Primary wire
)
Fig.1-1-11
AC Line Voltage
100 V
110 to 130 V
110 to 130 V
220 to 240 V
Region
Japan
USA & Canada
Europe & Australia
Load Z
1
0.15
1.5
2
50
Leakage Current (i)
i 1 mA rms
i 0.5 mA rms
i 0.7 mA peak
i 2 mA dc
i 0.7 mA peak
i 2 mA dc
a, b, c
Exposed accessible parts
Exposed accessible parts
Antenna earth terminals
Other terminals
Fig.1-1-12
NOTE :
These tables are unofficial and for reference only. Be sure to confirm the precise values for your particular country and locality.
)
)
)
1-4 (No.YD068)
1.2 Preventing static electricity
Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser
diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.
1.2.1 Grounding to prevent damage by static electricity
Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as DVD players.
Be careful to use proper grounding in the area where repairs are being performed.
(1) Ground the workbench
Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the
traverse unit (optical pickup) on it.
(2) Ground yourself
Use an anti-static wrist strap to release any static electricity built up in your body.
(3) Handling the optical pickup
• In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical
pickup are shorted. After replacement, return the shorted parts to their original condition.
(Refer to the text.)
• Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power source can easily
destroy the laser diode.
(No.YD068)1-5
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
2.1 DIFFERENT TABLE OF FEATURE
The following table indicates main different points between models HR-XV28SEF, HR-XV28SEK, HR-XV28SER, HR-XV28SEU and
HR-XV28SEY/EZ.
MODEL NAME HR-XV28SEF HR-XV28SEK HR-XV28SER
SCART CABLE PROVIDED ← OPTIONAL
BROADCASTING SYSTEM PAL B/G, SECAM L PAL I, I/I, B/G, SECAM D/K, K1 ←
RF OUT CH/RF OUT
SYSTEM [INITIAL]
OSD LANGUAGES
REGIONAL CODE REGIONAL CODE : 2 ← REGIONAL CODE : 5
MODEL NAME HR-XV28SEU HR-XV28SEY/EZ
SCART CABLE OPTIONAL ←
BROADCASTING SYSTEM PAL I, I/I, B/G, SECAM D/K, K1 ←
RF OUT CH/RF OUT
SYSTEM [INITIAL]
OSD LANGUAGES
REGIONAL CODE REGIONAL CODE : 2 ←
Note:
Mark ← is same as left.
ENGLISH/GERMANY/FRENCH/
ITALIAN/SPANISH/DUTCH
ENGLISH/GERMANY/ITALIAN/
SPANISH/GREEK/PORTU-
NOT USED 22-68CH,[36CH]/I 22-68CH,[36CH]/K
ENGLISH/GERMANY/ITALIAN/
SPANISH/GREEK/PORTU-
GUESE
22-68CH,[36CH]/G ←
ENGLISH/POLISH/CZECH/
HUNGARIAN/SWEDISH/GER-
GUESE
MANY
ENGLISH/RUSSIAN
1-6 (No.YD068)
2.2 SERVICE INFORMATION FOR EEPROM IC SETTING(VCR)
EEPROM option code No. setting EEPROM option code No. setting procedure
NAME HEX BINARY
OPT0 00 00000000
OPT1 00 00000000
OPT2 00 00000000
OPT3 00 00000000
OPT4 00 00000000
OPT5 00 00000000
12/26 - 00 V00 -COM Ver.
ID : LG
VERSION : 05 ROM
DATE : 02.17.05 Correction Ver.
MODEL NAME HEX BINARY
HR-XV28SEU OPT0 00 00000000
OPT1 54 00000000
OPT2 60 00000000
OPT3 47 00000000
OPT4 03 00000000
OPT5 0B 00000000
HR-XV28SEK OPT0 00 00000000
OPT1 54 00000000
OPT2 21 00000000
OPT3 87 00000000
OPT4 0D 00000000
OPT5 0B 00000000
HR-XV28SEZ OPT0 00 00000000
OPT1 54 00000000
OPT2 63 00000000
OPT3 47 00000000
OPT4 0D 00000000
OPT5 0B 00000000
HR-XV28SEY OPT0 00 00000000
OPT1 54 00000000
OPT2 63 00000000
OPT3 47 00000000
OPT4 0B 00000000
OPT5 0B 00000000
HR-XV28SER OPT0 09 00000000
OPT1 54 00000000
OPT2 A3 00000000
OPT3 47 00000000
OPT4 0D 00000000
OPT5 0B 00000000
HR-XV28SEF OPT0 00 00000000
OPT1 5C 00000000
OPT2 E8 00000000
OPT3 47 00000000
OPT4 01 00000000
OPT5 0B 00000000
WR : OK I : EXIT MOVE :
EDIT :
1. DETECT NEW EEPROM (OPTION EDIT
SCREEN)
- Eeprom EDIT screen automatically appears if
replacing Eeprom.
- Setup option data using the cursor Up/Down key
of a remote control.
(Setup upon BOM depending on OPT0~OPT5
model)
Since an initial remote control is set to LG for LG
model, appropriately set optiona data using the
cursor Up/Down key.
2. EEPROM WRITED AND EEPROM INITIAL
- Writes data on EEPROM by using REMOCON
"OK" + FRONT PLAY KEY FOR MORE THAN 5
SECONDS.
3. PG ADJUST
1) Payback the SP standard tape
2) Press the "OK" key on the Remote controller
and the "PLAY" key on the Front Panel the
same time, then it goes in to Tracking initial
mode.
3) Repeat the above step(No.2), then it finishes
the PG adjusting automatically.
4) Stop the playback, then it goes out to PG
adjusting mode after mony the PG data.
4. BUYER SELECTION
- Font ejection key + open/close key for more than
5 seconds.
- Option code is displayed in TV
- First byte of OPTO is changed whenever front
eject key + open/close key.
- JVC remote conroller No.0.
(No.YD068)1-7
2.3 SERVICE INFORMATION FOR EEPROM (DVD)
POWER ON
DVD LOGO Status (NO Disk status)
DETECT NEW EEPROM
(OPTION EDIT SCREEN)
Remote control
Pause key 1 4 7 2 in order.
Press number 0~9, Press charater
A~F (1~6 for a while)
Use arrow key ( ) to move
to approprite position and make
changes
Press pause key once
Change will be applied when power
OFF ON.
MODEL
NAME HEX HEX HEX HEX HEX HEX
OPT 1 44 47 50 53 52 42
OPT 2 45 42 4C 45 55 45
OPT 3 00 00 00 00 00 00
OPT 4 D3 D3 D3 D3 D3 D3
OPT 5 12 12 12 12 12 12
OPT 6 05 05 05 05 05 05
OPT 7 30 30 30 30 30 30
OPT 8 00 00 00 00 00 00
OPT 9 00 00 00 00 00 00
OPT A 00 00 00 00 00 00
OPT B 80 80 80 80 80 80
OPT C 00 00 00 00 0A 00
OPT D 00 00 00 00 00 00
OPT E 00 00 00 00 00 00
OPT F 00 00 00 00 00 00
OPT G 00 00 00 00 00 00
HR-XV28SEU HR-XV28SEK HR-XV28SEZ HR-XV28SEY HR-XV28SER HR-XV28SEF
* OPTION
NTSC model does not have VCR option and use DVD option B~F as VCR option. (only DVD exist)
PAL model has another separate VCR option. (Both VCR and DVD exist)
1-8 (No.YD068)
SECTION 3
DISASSEMBLY
This service manual does not describe DISASSEMBLY.
(No.YD068)1-9
SECTION 4
ADJUSTMENT
4.1 POSITION DRAWING OF DECK MECHANISM PARTS (VCR)
Top View
9
2
6
11
1
33
14
15
7
35
4
3
5
10
8
12
18
16
17
19
13
15
Bottom View
20
21
24
21
24
23
22
30
NOTE : Assembly order is a reverse of
disassembly order.
26
32
31
31
32
25
34
28
27
29
Order Of Dis-
assembled
Parts firstly
Disassembled
1
Drum Assembly
2
Plate Top
2
2,3
2,3,4
2,3,4,5
2,3
2,3
2,3,13,14
17
17
17,18
21,22
21
21,22,23,
24,25,26
21,22,23,
24,25,26,27
21,22,23,
24,25,26,27
21,22,23,
24,25,26,27
25
2,3,14,
25,31
25,31
2,3,14
3
Holder Assembly CST
4
Gear Assembly Rack F/L
5
Opener Door
6
Arm Assembly F/L
7
Lever Assembly S/W
8
Motor Assembly L/D
9
Gear Wheel
10
Arm Assembly Cleaner
11
Head F/E
12
Base Assembly A/C Head
13
Brake Assembly T
14
Arm Assembly Tension
15
Reel S / Reel T
16
Base Assembly P4
17
Opener Lid
18
Arm Assembly Pinch
19
Arm T/up
20
Supporter, capstan
21
Belt Capstan/Motor Capstan
22
Lever F/R
23
Clutch Assembly D37
24
Gear Drive/Gear Cam
25
Gear Sector
26
Brake Assembly Capstan
27
Plate Slider
28
Lever Tension
29
Lever Spring
30
Lever Brake
Gear Assembly P2/
31
Gear Assembly P3
Base Assembly P2
32
/Base Assembly P3
33
Base Loading
34
Base Tension
35
Arm Assembly Idler Jog
T:Top, B:Bottom
Part
Ref.
Fixing Type
Draw-
ings
3 screws
2 hooks
6 chasses
1 hook
Chassis Hole
Chassis Hole
Chassis Hole,
1 hook
1 screw
2 hooks
Chassis Embossing
Chassis Embossing
1 screw
1 hook
1 hook
Shaft
Chassis Embossing
Chassis Embossing
Shaft
1 hook
Chassis Hole
3 screws
Ta b
Washer
Washer/Hook
Hook
Chassis Hole
Chassis Guide
1 Hook
1 Hook
1 Hook
Bass
6 Chasses
3 Hooks
Chassis Embossing
Locking Tab
A-1
A-2
A-2
A-2
A-2
A-2
A-2
A-3
A-3
A-3
A-3
A-3
A-4
A-4
A-4
A-5
A-5
A-5
A-5
A-6
A-6
A-6
A-6
A-7
A-7
A-7
A-7
A-7
A-7
A-7
A-8
A-8
A-8
A-9
A-9
Posi
tion
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
(1) For assembly, check the assembly mode is accurate.
(2) Parts firstly disassembled indicate parts firstly disassembled
in disassembly of related parts.
1-10 (No.YD068)
4.2 DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM (VCR)
Drum Assembly
Cable Flat
1. Disassembly of Drum Assembly
(Figure A-1)
1) Separate cable flat from the Drum FPC and the Capstan
Motor.
2) Release 3 screws (S1) on the bottom side of the chassis,
and separate the drum assembly.
3) Release the hooks (H1, H2) and separate both the holder
FPC and the Cap FPC (disassemble if necessary).
(S1)
H2
Fig. A-1
Cautions in assembly of FPC
Holder FPC
(S1)
(S1)
Cap, FPC
H1
Holder FPC
Cap FPC
Drum FPC
Assembly shape seen in the reverse direction
(No.YD068)1-11
Plate Top
(Fig. A-2-1)
(H4)
(B')
Arm Assembly F/L
(Fig. A-2-5)
Lever Assembly S/W
(Fig. A-2-6)
(B)
(C)
Holder Assembly CST
(Fig. A-2-2)
(E)
(E)
1-12 (No.YD068)
Fig. A-2
Gear Assembly Rack F/L
(Fig. A-2-3)
Opener Door
(Fig. A-2-4)
(A)
(H3)
(B)
2. Disassembly of Plate Top (Fig. A-2-1)
1) Separate the right part while leaning back the (B) part of
the plate top toward the arrow direction.
2) Separate the left part while leaning back the (B f) part of
the plate top toward the arrow direction.
(Tool used: Tool such as (-) driver, auger, etc with pointed
or flat end)
CAUTIONS
Assemble while pressing the (C), (C') part after corresponding them as in drawing.
(C')
(C)
(B')
(B)
3. Holder Assembly CST (Fig. A-2-2)
1) Firstly separate the left part from the groove on the (D)
part of chassis while moving the holder assembly CST
toward the arrow direction.
Holder Assembly CST
(D)
Chassis
4. Disassembly of Gear Assembly
Rack F/L (Fig. A-2-3)
1) Separate the hook (H3) while leaning ahead the hook (3)
after moving the gear assembly rack F/L toward the arrow
(A) direction.
2) Separate the gear assembly rack F/L toward the arrow (B)
direction.
CAUTIONS
For the assembly, correspond the gear part of gear assembly
rack F/L to the gear drive.
Gear Rack F/L
Gear Drive
5. Opener Door (Fig. A-2-4)
1) Separate the opener door ahead from the guide hole of
chassis while turning it clockwise.
6. Arm Assembly F/L (Fig. A-2-5)
1) Firstly separate the left part of the arm assembly F/L from
the groove of chassis while pushing the arm assembly F/L
toward the arrow direction.
2) Separate the right part from the groove of chassis.).
2) Separate the right part from each groove of chassis
CAUTIONS
Assemble by inserting the left part after firstly inserting the
(E) part of the holder assembly CST into the groove on the
(E') part of chassis.
7. Lever Assembly S/W (Fig. A-2-6)
1) Separate the lever assembly S/W while pushing it toward
the arrow direction after removing the hook (4) on the left
side of chassis.
Chassis
(H4)
(No.YD068)1-13
Base Assembly A/C Head
(Fig. A-3-5)
(A)
Arm Assembly Cleaner
(Fig. A-3-3)
(A)
(S5)
(H5)
Gear Wheel
(Fig. A-3-2)
Motor Assembly L/D
(Fig. A-3-1)
Head F/E
(Fig. A-3-4)
(C1)
(S4)
Fig. A-3
8. Motor Assembly L/D (Fig. A-3-1)
1) Take the connector (C1) connected to the Capstan motor
PCB out.
2) Remove a screw (S4) of the chassis (S4) and step back ward, and disassemble it while holding it up.
9. Gear Wheel (Fig. A-3-2)
1) Release the hook (H5) of the gear wheel and disassemble
it upward.
1-14 (No.YD068)
10. Arm Assembly Cleaner (Fig. A-3-3)
1) Separate the (A) part of Fig. A-3-1 from the embossing of
chassis, and hold it up while turning it anti-clockwise.
11. Head F/E (Fig. A-3-4)
1) Separate the (A) part of the head F/E from the embossing of chassis, and hold it up while turning it anti-clockwise.
12. Base Assembly A/C Head (Fig. A-3-5)
1) Release a screw (S5) and disassemble while holding it up.
Arm Assembly Tension
(Fig. A-4-2)
Spring Tension
(H7)
Reel T
(Fig. A-4-3)
Reel S
(Fig. A-4-3)
(H8)
Spring Tension
Fig. A-4
Brake Assembly T
(Fig. A-4-1)
(H6)
13. Brake Assembly T (Fig. A-4-1)
1) Release the spring tension from the lever spring hook
(H6).
2) Disassemble the brake assembly T while holding it
upward.
14. Arm Assembly Tension (Fig. A-4-2)
1) Release the spring tension the hook (H7) from the arm
assembly tension.
2) After releasing the hook (H8) of the base tension, separate
it while holding it up.
CAUTIONS
Spring used for both brake assembly T and arm assembly
tension is used (2EA used).
15. Reel S/Reel T (Fig. A-4-3)
1) Disassemble the reel S/ reel T while holding it up (compa rison between Reel S and Reel T)
Reel S Reel T
(No.YD068)1-15
(Fig. A-5-2)
(B)
Opener Lid
Arm Assembly Pinch
(Fig. A-5-3)
(C)
Base Assembly P4
(Fig. A-5-1)
(A)
(C)
(H9)
Arm T/up
(Fig. A-5-4)
Chassis
16. Base Assembly P4 (Fig. A-5-1)
1) Release the (A) part of the base assembly P4 from the
embossing of chassis.
2) Hold the base assembly P4 up while turning it anti-clock wise.
17. Opener Lid (Fig. A-5-2)
1) Release the (B) part of the opener lid from the embossing
of chassis.
2) Disassemble the opener lid upward while turning it anticlo ckwise.
1-16 (No.YD068)
Fig. A-5
18. Arm Assembly Pinch (Fig. A-5-3)
1) Hold the arm assembly pinch up.
19. Arm T/up (Fig. A-5-4)
1) Turn the arm T/up to release the anchor jaw (H9) part of
chassis and then hold it upward.
CAUTIONS
For the assembly, check the (C) part of the arm assembly
pinch is assembled as in drawing.
- REVERSE THE MECHANISM.
Suppoter Capstan
(Fig. A-6-1)
Motor Capstan
(L1)
Lever F/R
(Fig. A-6-4)
Belt Capstan
(Fig. A-6-2)
(Fig. A-6-3)
Washer(W1)
Clutch Assembly D37
(Fig. A-6-5)
(L1)
(S6)
Fig. A-6
20. Supporter, Capstan (Fig. A-6-1)
1) Turn the supporter and Capstan by 90 deg. clockwise
with a driver for disassembly.
21. Belt Capstan (Fig. A-6-2) /
Motor Capstan (Fig. A-6-3)
1) Separate the belt Capstan.
2) Undo 3 screws (S6) on the bottom side of chassis and dis assemble it upward.
Chassis
22. Lever F/R (Fig. A-6-4)
1) Release the locking tab (L1) and then disassemble it
upward.
23. Clutch Assembly D37 (Fig. A-6-5)
1) Remove the washer (W1) and then disassemble it
upward.
(No.YD068)1-17
(H10)
(Fig. A-7-2)
(W2)
Gear Cam
Washer (W2)
(H11)
Gear Sector
(Fig. A-7-3)
Gear Cam Hole(B)
Gear Cam Hole(C)
Gear Drive Hole(A)
Gear Drive
(Fig. A-7-1)
Lever Brack
(Fig. A-7-8)
(L2)
Chassis
Brake Assembly Capstan
(Fig. A-7-4)
(Fig. A-7-5)
(Fig. A-7-6)
(B)
(Fig. A-7-7)
3 6
Plate Slider
Lever Tension
Lever spring
Base Loading
Fig. A-7
24. Gear Drive (Fig. A-7-1)/Gear Cam (Fig. A-7-2)
1) Remove the washer (W2) and then disassemble the
gear drive.
2) Release the hook (H10) of the gear cam and then disas semble it upward.
CAUTIONS
For the assembly, adjust both the gear driver hole (A) and
the gear cam hole (B) straightly and then correspond the
gear cam hole (C) to the chassis hole.
25. Gear Sector (Fig. A-7-3)
1) Release the hook (H11) of the gear sector and then hold
the gear sector upward.
26. Brake Assembly Capstan (Fig. A-7-4)
1) Release the locking tab (L2) on the bottom side of the
plate slider and then disassemble it upward.
27. Plate Slider (Fig. A-7-5)
1) Disassemble the plate slider while holding it up.
28. Lever Tension (Fig. A-7-6)
1) Release the lever tension from the guide (A) of chassis
while turning it anti-clockwise.
2) Disassemble the lever tension while holding it up.
29. Lever Spring (Fig. A-7-7)
1) Release the (B) part of the lever spring from the guide
(A) of chassis while turning it anti-clockwise.
2) Disassemble the lever tension while holding it up.
30. Lever Brake (Fig. A-7-8)
1) Disassemble the lever brake while holding it up.
1-18 (No.YD068)
Gear assembly P2 Hole
Gear assembly P3 Hole
Lever Tension Boss
Gear sector (A)
Plate slider Hole(B)
(H12)
(H14)
Gear Assembly P3
(Fig. A-8-2)
Gear Assembly P2
(Fig. A-8-1)
(H13)
Base Loading
(Fig. A-8-5)
Chassis
Base Assembly P3
(Fig. A-8-4)
31. Gear Assembly P2 (Fig. A-8-1)/
Gear Assembly P3 (Fig. A-8-2)
1) Hold the gear assembly P2 upward.
2) Hold the gear assembly P3 upward.
CAUTIONS
For the assembly, check the holes of both the gear assembly P2 and the P3 are adjusted straightly, and then correspond the gear section groove (A) to the plate slider hole (B).
(B)
(A)
Base Assembly P2
(Fig. A-8-3)
Fig. A-8
32. Base Assembly P2 (Fig. A-8-3)/
Base Assembly P3 (Fig. A-8-4)
1) Disassemble the base assembly P2 downward while mov ing it toward the arrow (A) direction along with the guide
hole of chassis.
2) Disassemble the base assembly P2 downward while mov ing it toward the arrow (B) direction along with the guide
hole of chassis.
33. Base Loading (Fig. A-8-5)
1) Release 3 hooks (H12, 13, 14) of the base loading, and
then disassemble them upward.
- REVERSE THE MECHANISM.
(No.YD068)1-19
Base Tension
(Fig. A-9-1)
(A)
Arm Assembly Idler Jog
(Fig. A-9-2)
(B) (C)
(D)
34. Base Tension (Fig. A-9-1)
1) Release the (A) part of the base tension from the
embossing of chassis.
2) Hold the base tension upward while turning it anti-clock wise.
Chassis
Fig. A-9
35. Arm assembly Idler Jog (Fig. A-9-2)
1) Push both (B), (C) parts in Fig. A-9-2 toward the arrow
direction.
2) Disassemble the arm assembly idler upward.
CAUTIONS
Take care to ensure that the (D) part in the drawing is not
hung to chassis in disassembly.
1-20 (No.YD068)
4.3 DECK MECHANISM ADJUSTMENT (VCR)
4.3.1 Tools and Fixfures for Service
1. Cassette Torque Meter
1. PUJ42881
1.
300
S
-
T
2
50
H
V
-
20
0
K
R
15
0
S
SRK
VIDEO
CASSETTE
H
V
T
-
-
K
T
R
0
TORQUE
S
50
0
METER
VHT-303
50
15
0
2
00
25
0
300
5. Post Height Adjusting Driver
(Roller driver)
PTU94002
2. Alignment Tape
NTSC: MHP
PAL: MHPE
3. Torque Gauge
3. PUJ48075-2
(No.YD068)1-21
4.3.2 Mechanism Assembly Mode Check
Purpose of adjustment : To make tools normally operate by positioning tools accurately.
Fixtures and tools used VCR (VCP) status Checking Position
Blank Tape (empty tape)
Eject Mode
(with cassette withdrawn)
1) Turn the VCR on and take the tape out by pressing the
eject button.
2) Separate both top cover and plate top, and check both
the hole (A) of gear cam and the hole (A') of chassis co rrespond (Fig. C-2).
3) If it is done as in the paragraph 2): Turn the gear cam as
in No.2) after mantling the motor assembly L/D.
CHECK DIAGRAM
Mechanism and Mode Switch
4) Undo the screw fixing the deck and the main frame, and
separate the deck assembly. Check both the hole (A) of
gear cam and the hole (A') of chassis correspond (Fig.
C-1).
5) Check the mode S/W on the main P.C. board locates at
a proper position as in (B) of the Fig. (C-1).
6) Connect the deck to the main P.C. board and perform all
types of test.
Gear Cam
(C)
Gear Drive
(B)
Mode S/W
BOTTOM VIEW
TOP VIEW
Fig. C-1
Fig. C-2
Correspondence of the gear cam hole (O)
and the gear drive hole (O)
Motor Assembly L/D
Gear Cam
(A')
(A)
Chassis Hole
Gear Cam Hole
1-22 (No.YD068)
4.3.3 Previous Preparation for Deck Adjustment
(Preparation to load the VCR (VCP) with cassette tape not inserted)
(1) Take the power cord from the consent.
(2) Separate the top cover and the plate assembly top.
(3) Insert the power cord into again.
(4) Turn the VCR (VCP) on and load the cassette while push-
ing the lever stopper of the holder assembly CST back-
If doing so, proceeding to the stop mode is done. In this status,
input signals of all modes can be received. However, operation
of the Rewind and the Review is impossible since the take-up
reel remains at stop status and so cannot detect the reel pulse
(however, possible for several seconds).
ward. In this case, clog both holes on the housing rail part
of chassis to prevent detection of the end sensor.
4.3.4 Torque Measuring
Purpose of Measuring : To measure and check the reel torque on the take-up part and the
supply part that performs basic operation of the VCR (VCP) for
smoothly forwarding the tape.
Measure and check followings when the tape is not smoothly
wound or the tape velocity is abnormally proceeded:
VCR (VCP) status Measuring methodFixtures and tools used
Torque Gauge
(600 g.cm ATG)
Torque Gauge Adaptor
Cassette Torque Meter
Play (FF) or Review
(REW) Mode
Try to operate the VCR (VCP) per mode with the
tape not inserted (See 4.3.3 Prior Preparation for
Deck Adjustment).
Measure after adhering and fixing the torque
gauge adaptor to the torque gauge (Fig. C-3-1)
Read scale of the supply or take-up part of the
cassette torque meter (Fig. C-3-2).
Item
Fast forward Torque
Rewind Torque
Play Take-Up Torque
Review Torque
Fast Forward
Rewind
Play
Review
Mode Instruments Reel Measured Measuring Value
Torque Gauge
Torque Gauge
Cassette Torque Meter
Cassette Torque Meter
Take-Up Reel
Supply Reel
Take-Up Reel
Supply Reel
NOTE
Adhere the torque gauge adaptor to the torque gauge for measuring the value.
Cassette Torque MeterTorque Gauge (600g.cm ATG)
Torque Gauge
Torque Gauge
Adaptor
More than 400g cm
More than 400g cm
40~100g cm
40~210g cm
300
S
-
T
250
H
V
-
200
K
R
150
S
SRK
VIDEO
CASSETTE
H
V
T
-
-
K
T
R
TORQUE
50
0
METER
VHT-303
0
S
50
150
200
250
300
Reel Table
Fig. C-3-2Fig. C-3-1
(No.YD068)1-23
4.3.5 Guide Roller Height Adjustment
Purpose of adjustment : To ensure that the bottom surface of the tape can travel along with
the tape lead line of the lower drum by constantly and adjusting
and maintaining the height of the tape.
4.3.5.1 Prior Adjustment
Fixtures and tools used VCR (VCP) status Adjustment position
Post Height Adjusting
Driver
Play or Review Mode
Adjustment Procedure
1) Travel the tape and check the bottom surface of the
tape travels along with the guide line of the lower drum.
2) If the tape travels toward the lower part of guide line on
the lower drum, turn the guide roller height adjusting
screw to the left
3) If it travels to the upper part, turn it to the right.
4) Adjust the height of the guide roller to ensure that the
tape is guided on the guide line of the lower drum at the
inlet/outlet of the drum. (Fig. C-4-1)
4.3.5.2 Fine Adjustment
Fixtures and tools used
Oscilloscope
Alignment tape
Post height adjusting
driver
Measuring tools and
connection position
CH-1: PB RF Envelope
CH-2: NTSC : SW 30Hz
PAL : SW 25Hz
Head switching output
point
RF Envelope output
point
The guide roller height adjusting screw on the
supply guide roller and the take-up guide roller
ADJUSTMENT DIAGRAM
Fig. C-4-1
GUIDE ROLLER
HEIGHT
ADJUSTMENT SCREW
VCR (VCP) status Adjustment position
Play the standard test
tape.
Guide roller height
adjusting screw
Waveform
P2 POST ADJUSTMENT
1) Play the Alignment tape after connecting the probe of
oscilloscope to the RF envelope output point and the
head switching output point.
2) Tracking control (playback) : Locate it at the center
(Set the RF output to the maximum value via the tracking
control when such adjustment is completed after the
drum assembly is replaced.)
3) Height adjusting screw: Flatten the RF waveform.
(Fig. C-4-2)
4) Move the tracking control (playback) to the right/left.
(Fig. C-4-3)
5) Check the start and the end of the RF output reduction
width are constant.
CAUTIONS
There must exist no crumpling and folding of the tape due
to excess adjustment or insufficient adjustment.
P3 POST ADJUSTMENT
Fig. C-4-2
When the tracking control
locates at the center.
Fig. C-4-2
Connection Diagram
RF ENVELOPE OUTPUT POINT
HEAD RF SWITCHING OUTPUT POINT
Flatten the waveform by
lightly turning the guide
roller height adjustment
screw.
When turning the tracking
control to both sides.
OSCILLOSCOPE
CH-1 CH-2
1-24 (No.YD068)
4.3.6 Audio/Control (A/C) Head Adjustment
Purpose of adjustment : To ensure that audio and control signals can be recorded and
played according to the contract tract by constantly maintaining
distance between tape and head, and tape tension between the P3
post and the P4 post.
4.3.6.1 Prior Adjustment (performed only when no audio output appears in play of the standard test tape)
Fixtures and tools used VCR (VCP) status Adjustment position
Blank Tape
Driver (+) Type 5mm
Play the blank tape
Adjustment Procedure/Adjustment Diagrams
1) Basically use the A/C head assembly adjusted as in
SPEC.
2) Check there is crumpling and folding of the tape around
the A/C head. If it is, Turn and adjust the tilt adjusting
screw to ensure that the tape corresponds to the bottom
guide of the P4, and recheck the tape path after proceed ing play for 4-5 seconds.
8.3
A/C Head Base
Tilt adjusting screw (C)
Height adjusting screw (B)
Azimuth adjusting screw (A)
3) Where the tape bottom is not equal to Fig. C-5-3, Adjust
the height by using the height adjusting screw (B) and
then readjust it by using the tilt adjusting screw (C).
CAUTIONS
Always check the height of the A/C head since most ideal
height of A/C head can be obtained when the bottom part
of the tape is away 0.2 ~ 0.25mm from the bottom part of
the A/C head.
A/C Head
P4
Tape
0.2~0.25mm
Tape
Azimuth
Adjustment
Screw(A)
Fig. C-5-1
X-Value Adjustment
Hole
Fixed Screw
A/C Head Assembly
Fig. C-5-2
Fig. C-5-3
Tilt Adjustment
Screw(C)
Height Adjustment
Screw(B)
(No.YD068)1-25
4.3.6.2 Tape Path Check between Pinch Roller and Take up Guide (Check in the Rev Mode)
1) Check the tape pass status between the pinch roller and the
take-up guide.(Check there is crumpling of the tape pass and
folding of the take-up guide.)
(1) When holding of the take-up guide bottom occurs
Turn the tilt adjusting screw (C) clockwise and travel it stably to ensure there is no crumbling or folding of the tape.
(2) When holding of the take-up guide top occurs
Turn the tilt adjusting screw (C) anti-clockwise and travel it
stably to ensure there is no crumbling or folding of the tape.
4.3.6.3 Fine Adjustment (Azimuth Adjustment)
2) Check there is folding of the tape at the bottom or top of the
take-up guide in cutting-off the REV mode
CAUTIONS
If the RF waveform is changed after adjusting the A/C head,
perform fine adjustment to ensure the RF waveform is flatened.
Fixtures and tools used Connection position VCR (VCP) status Adjustment position
Oscilloscope
Standard test tape
(only for SP)
Driver (+) Type 4mm
Adjustment Procedure
1) Connect the probe of Oscilloscope to the audio output
jack.
2) Ensure that Audio 1KHz, 7KHz output is flattened at the
maximization point by adjusting the Azimuth adjusting
screw (A).
4.3.7 X-Value Adjustment
Audio Output Jack Play the Alignment tape
1KHz, 7KHz.
1KHz
A: Maximum
Fig. C-5-4
Azimuth Adjusting
Screw (A)
Height Adjusting Screw
(B)
B: Minimum
Purpose of adjustment : To maintain compatibility with other VCR (VCP).
Fixtures and tools used Connection position VCR (VCP) status Adjustment position
Oscilloscope
Standard test tape
(only for SP)
Driver (+) Type 4mm
CH-1: PB RF Envelope
CH-2: NTSC ; SW 30Hz
PAL:SW 25Hz
Head switching output
point
RF Envelope output
point
Play the Alignment tape
Left
Grove of Base A/C
Right
7KHz
Adjustment Procedure
1) After releasing the auto tracking, lightly turn the fixing
screw. Turn the (+) type driver on the X-dis-tance adju sting hole to the right or left. Adjust the RF envelope
level to the maximum point and then fix the fixing screws.
2) For the 31 m head, adjust it with the SP tape recorded
in the width of 31 m since the head travels on the tape
track only for SP with the width of 58 m.
1-26 (No.YD068)
Connection Diagram
X-value Adjusting Hole
Fixing Screw
Azimuth
Adjustment
Screw(A)
Fig. C-6
RF ENVELOPE OUTPUT POINT
HEAD RF SWITCHING OUTPUT POINT
Tilt Adjusting Screw (C)
Height Adjusting
Screw (B)
OSCILLOSCOPE
CH-2CH-1
4.3.8 Adjustment after Drum Assembly (Video Heads)
Purpose of adjustment : To adjust and stabilize the height change, X-distance change, etc
depending on the guide roller after assembling the drum.
Fixtures and tools used Connection position VCR (VCP) status Adjustment position
Oscilloscope
Alignment tape
(only for SP)
Post Height Adjusting
Driver
Driver (+) Type 5mm
CH-1: PB RF Envelope
CH-2: NTSC : SW 30Hz
PAL:SW 25Hz
Head switching output
point
RF Envelope output
point
Checking/Adjustment Procedure
1) Play the blank tape and check whether the guide roller
crumbles or wrinkles the tape and adjust it if necessary.
2) Check that the RF envelope output waveform is flat, and
adjust the height of the guide roller while playing the
alignment tape.
3) Adjust the switching point.
4) Check the RF envelope output is the maximum when
the tracking control locates at the center. If not maximum,
set up to ensure that RF envelope output becomes the
maximum by turning the (+) type driver on the base A/C
groove.
4.3.9 Check of Traveling Device after Deck Assembly
4.3.9.1 Audio, RF Normalization Time (Locking Time) Check in Play after CUE or REV
Play the blank tape.
Play the Alignment tape.
Connection Diagram
RF ENVELOPE OUTPUT POINT
HEAD RF SWITCHING OUTPUT POINT
Waveform
V1/V MAX = 0.7
V1/V MAX = 0.8
RF ENVELOPE OUTPUT
Fine adjustment of
guide roller
Switching Point
Tracking Preset
X-value
OSCILLOSCOPE
CH-2CH-1
V2V1V1
Fixtures and tools used Measuring standard Connection position VCR (VCP) status
Oscilloscope
Alignment tape
(Colour bar)
Stop Watch
RF Locking Time: Within
5 seconds
Audio Locking Time :
Within 10 seconds
CH-1: PB RF Envelope
CH-2: Audio output
RF Envelope output
point
Play the Alignment
tape (Colour bar)
Audio output jack
Checking Procedure
1) Check that locking time of the RF and Audio waveform is
fallen within the measuring standard in conversion of the
play mode from the CUE or the REV mode.
4.3.9.2 Check of Tape Curl and Jam Status
2) Readjust the paragraph 4.3.6 and 4.3.7 if it deviates
from the standard.
Fixtures and tools used Fixtures and tools used Fixtures and tools used
E-240 Tape
E-160 Tape
Checking Procedure
1) Check there is no abnormality of every traveling post
status.
2) There must be no abnormal operation of the counter in
There must be no jam or curl at the
first, middle and end position of tape.
occurrence of folding of the bottom tape. There must be
not abnormality of audio signal in damage of the top tape.
3) If there is abnormality, readjust the adjustment paragraph
4.3.5 and 4.3.6.
Travel the tape at the position
of its first and end.
(No.YD068)1-27
4.4 PROTECTION, MAINTENANCE AND CHECK OF VIDEO FUNCTION (VCR)
4.4.1 Checking Points prior to Repair
Following abnormal phenomena may be repaired by removal of
foreign materials and oil supply. Check oiling is required at the
checking set or cleaning status is complete.
Determine that necessity of checking and repair the set exists after checking the using period of the set together with the user. In
this case, followings must be checked:
Phenomena
Color beat Pollution of Full-Erase Head o
S/N, Color Faded Pollution of Video Head o
Horizontal, Vertical Jitte o
Poor Sound, Low Sound o
No tape wound or tape
wound loosely.
FF or REW impossible,
or slow turning
Tape loosely wound in
REV or Unloading
Checking Points and
Cause
Pollution of Video Head or
Tape Transport System
Pollution of Audio/Control
Head
Pollution of Pinch Roller or
Belt Capstan Belt
Deterioration of Clutch
Assembly D37 Torque
Pollution of Drum and
Traveling Device
Replace-
ment
o
o
Fig. C-9-3
CAUTIONS
If operation of the position with (O) mark is abnormal even
after removing cause, replace it with substitute product since
it shows damage or wearing.
F/E Head
Video Head
Fig. C-9-1 TOP VIEW
A/C Head
Pinch Roller
Belt Capston
Clutch
Assembly A37
Fig. C-9-2 BOTTOM VIEW
* No. (1) ~ (12) shows sequence that the tape moves from the supply reel to the take-up reel.)
(3) F/E Head
(5) Drum Assembly
(Video Head)
(4) Base Assembly P2
(2) Tension Post
(1) Supply Reel
Fig. C-9-3 Tape Transport System
1-28 (No.YD068)
(6) Base Assembly
P3
(7) A/C Head
(8) P4 Post
(10) Pinch Roller
(11) Take-up Guide
Post
(9) Capstan Shaft
(12) Take-up Reel
4.4.2 Essential Check and Repair
Recording density of the video is far higher than the audio.
Therefore video parts are very precise so as to allow only error
of 1/1000mm or so in order to maintain compatibility with other
videos.
If one of these parts is polluted or old, same phenomena will
appear as they are damaged.
To maintain clear screen, regular check, replacement of old and
damaged parts and oil supply, etc are essential.
4.4.3 Regular Check and Repair
Check and repair schedule is not constant since they vary depending on method that the consumer uses video and environment where the video is installed at.
However, for the video used by common household, good screen
will be maintained if regular check and repair per 1,000 hour is
performed. The following chart shows relationship between using time and checking time:
Time
Requiring
Checking
Average
hours used
per day
One hour
Two hours
Three hours
About
1 year
About
18 months
About
3 years
4.4.4 Tools for Check and Repair
(1) Grease: Floil G-3114 (KANTO) or equivalent grease
(Green)
(2) Grease: Kanto G-754, PL-433 (Yellow)
(3) Alcohol (Isopropyl Alcohol)
(4) Cleaning Patch (cloth)
4.4.5 Maintenance Process
4.4.5.1 Removal of Foreign Material
(1) Removal of foreign material from video head (Fig. C-9-4)
Firstly try to use a cleaning tape.
Use a cleaning patch if foreign materials are not removed
with the cleaning tape due to severe dirty of the head.
Soak the cleaning patch in alcohol and put it to the head tip.
Smoothly turn the drum (turning cylinder) to the right or left
(In this case, the cleaning patch must not be moved verti-
cally).
After completely drying the head, test the traveling status
of the tape.
If alcohol (Isopropyl Alcohol) remains at the video head, the
tape may be damaged when this solution touches with the
head surface.
Never use a cloth bar (commercial sale)
(2) Wipe the tape transport system and the drive system with
the cleaning patch soaked in alcohol (Isopropyl Alcohol)
when removing foreign materials from them.
1) The part touched with the traveling tape is called as tape
transport system. The drive system consists of parts to
travel the tape.
2) Care must be exercised so that unreasonable force to
change the pattern will be applied to the tape transport
system during removal of foreign materials.
Cleaning Patch
(Cloth)
Soak alcohol
(Isopropyl Alcohol).
Drum
(Turning Cylinder)
Head Tip
Smoothly turn the drum (turning
cylinder) touching the soft surface
to the head tip surface.
Fig. C-9-4
(No.YD068)1-29
4.4.5.2 Grease Applications
(1) Grease Application Method
Apply grease by using a cloth swab or brush. Care must be
exercised so that excess quantity should not be used. If the
excessive quantity is applied, wipe it with the gauze soaked
in alcohol (Isopropyl Alcohol).
(1) Inner Side Surface and Top
Surface of Loading Path
(2) Stable Adhesion Part of Base
P2, P3
(3) Arm Pinch Shaft
2
(4) Gear Wheel Shaft
(5) Reel S. T. Shaft
(1) (2) (3) (4): KG-684G
(Green)
(5): PL-433 (Yellow)
(2) Regular Grease Application
Apply grease to the designated application position every
500 hour.
NOTE: POSITION OF GREASE APPLICATION
(1) Inner Side Surface and Top
Surface of Loading Path
(2) Stable Adhesion Part of Base
P2, P3 Coil
(3) Gear Cam Shaft
(4) Gear Drive Shaft
(5) Clutch Shaft Groove
Guide Part on the Plate Slider
(6)
Side Wall (Left)
(7)
Guide Part on the Plate Slider
Side Wall (Right)
(1) (2) (3) (4) (5) (6) (7): KG 684G (Green)
2
Gear Part
1
5
Chassis (TOP)
Cam Part
(PL-433.Yellow)
Gear Part
(PL-433.Yellow)
Gear Sector Gear Cam
Base Loading Gear Drive
Cam Part Side Application
(KG-684G.Green)
Boss Part Side Wall
(PL-433.Yellow)
Gear Part Side Application
(PL-433.Yellow)
4
3
3
4
6
5
7
1
Chassis (Bottom)
Cam Part
(KG-684G , GREEN)
Cam Part
(KG-684G , GREEN)
Gear Rack F/L
1-30 (No.YD068)
Inner Surface of
Guide Rail
(KG-684G.Green)
Chassis (L) Chassis (R)
Lever, Brake Driving Cam Part
Side Wall Guide Part
Lever F/R Driving Part
Plate Slider
Lever Tension Driving Cam Part
Gear Sector Driving Part
Lever, Spring Driving Part
Side Wall Guide Part
Loading...