SERVICE MANUAL
VIDEO CASSETTE RECORDER
HR-S5901U,
HR-S5911U, HR-S5911U(C)
REW
FF
24HR QUICK
REC LINK PROGRAM
POWER
INSERT
A.DUB
S-VIDEO
SPECIFICATIONS
TUNER
GENERAL
Power requirement
Power consumption
Power on
Power off
Temperature
Operating
Storage
Operating position
Dimensions (W x H x D)
: AC 120 Vd, 60 Hz
: 17 W
: 1.5 W
:
:
:
:
5°C to 40°C (41°F to 104°F)
–20°C to 60°C (–4°F to140°F)
Horizontal only
435 mm x 94 mm x 247 mm
(17-3/16" x 3-3/4" x 9-3/4")
: 2.8 kg (6.2 lbs)
: S-VHS/VHS NTSC standard
Weight
Format
Maximum recording time
SP
: 210 min. with ST-210 video cassette
EP
: 630 min. with ST-210 video cassette
VIDEO/A UDIO
Signal system
Recording/Playback
system
Signal-to-noise ratio
Horizontal resolution
VHS
S-VHS
Frequency range
Normal audio
Hi-Fi audio
Input/Output
Tuning system
Channel coverage
VHF
UHF
CATV
RF output
:
:
:
:
Channels 2–13
Channels 14–69
113 Channels
Channel 3 or 4 (switchable; preset to
Channel 3 when shipped) 75 ohms,
unbalanced
TIMER
Clock reference
Program capacity
: Quartz
: 1-year programmable timer/
8 programs
Memory backup for timer is not supported.
ACCESSORIES
Provided accessories
: NTSC-type color signal and EIA
monochrome signal, 525 lines/
60 fields
: DA-4 (Double Azimuth) head helical
scan system
: 45 dB
: Frequency-synthesized tuner
: Infrared remote control unit,
“AA” battery x 2,
S-video cable (4-pin),
RF cable (F-type)
Specifications shown are for SP mode unless specified otherwise.
E. & O.E. Design and specifications subject to change without
notice.
: 230 lines
: 400 lines
: 70 Hz to 10,000 Hz
: 20 Hz to 20,000 Hz
: RCA connectors (IN x 2, OUT x 1)
S-video connectors (IN x 2, OUT x 1)
This service manual is printed on 100% recycled paper.
COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD
V15S15
No.82911
March 2002
TABLE OF CONTENTS
Section
Title
Page
Section
Title
Page
Important Safety Precautions
INSTRUCTIONS
1. DISASSEMBLY
4. CHARTS AND DIAGRAMS
1.1 Manually removing the cassette tape ......................... 1-1
1.2 Removing the major parts ........................................... 1-2
1.2.1 How to read the procedure table ........................... 1-2
1.2.2 Disassembly procedure ........................................ 1-2
1.3 Emergency display function ........................................ 1-4
1.3.1 Displaying the EMG information ........................... 1-4
1.3.2 Clearing the EMG history ...................................... 1-4
1.3.3 Details of the OSD display in the EMG display mode ... 1-5
1.3.4 EMG content description ....................................... 1-6
1.3.5 EMG detail information<1> ................................... 1-7
1.3.6 EMG detail information<2> ................................... 1-8
1.3.7 EMG detail information<3> ................................... 1-8
1.4 Service position ........................................................... 1-9
1.4.1 How to set the "Service position" .......................... 1-9
1.5 Jig RCU mode ............................................................. 1-9
1.5.1 Setting the Jig RCU mode .................................... 1-9
1.5.2 Setting the User RCU mode ................................. 1-9
1.6 Mechanism service mode ........................................... 1-9
1.6.1 How to set the "Mechanism service mode" ........... 1-9
1.6.2 How to exit from the "Mechanism service mode" .. 1-9
1.7 Maintenance and inspection ..................................... 1-10
1.7.1 Cleaning .............................................................. 1-10
1.7.2 Lubrication .......................................................... 1-10
1.7.3 Suggested servicing schedule for main components .. 1-10
4.1 BOARD INTERCONNECTIONS ................................. 4-3
4.2 MAIN(VIDEO/N. AUDIO) SCHEMATIC DIAGRAM ..... 4-5
4.3 MAIN(S-SUB) SCHEMATIC DIAGRAM ...................... 4-7
4.4 MAIN(SYSCON) SCHEMATIC DIAGRAM .................. 4-9
4.5 MAIN(SW.REG) SCHEMATIC DIAGRAM ................. 4-11
4.6 MAIN(TUNER) SCHEMATIC DIAGRAM ................... 4-13
4.7 MAIN(FMA/DEMOD) SCHEMATIC DIAGRAM ......... 4-15
4.8 MAIN(FRONT) SCHEMATIC DIAGRAM ................... 4-17
4.9 MAIN(TERMINAL) SCHEMATIC DIAGRAM ............. 4-19
4.10 2D DIGITAL SCHEMATIC DIAGRAM ..................... 4-21
4.11 2D DIGITAL CIRCUIT BOARD ................................ 4-23
4.12 MAIN CIRCUIT BOARD .......................................... 4-25
4.13 REMOTE CONTROLLER SCEMATIC DIAGRAM .. 4-27
4.14 WAVEFORMS ......................................................... 4-28
4.15 VOLTAGE CHARTS ................................................ 4-29
4.16 FDP GRID ASSIGNMENT AND ANODE CONNECTION ... 4-29
4.17 CPU PIN FUNCTION .............................................. 4-30
4.18 SYSTEM CONTROL BLOCK DIAGRAM ................ 4-31
4.19 VIDEO BLOCK DIAGRAM ...................................... 4-33
4.20 AUDIO BLOCK DIAGRAM ...................................... 4-37
2. MECHANISM
2.1 Before disassembling .................................................. 2-1
2.1.1 Notes ..................................................................... 2-1
2.1.2 Mechanism operation check ................................. 2-1
2.1.3 Setting the mechanism assembling mode ............ 2-1
2.1.4 Layout of the main mechanism parts .................... 2-2
2.1.5 Disassembling procedure table ............................. 2-3
2.2 Replacement of the main mechanism parts ................ 2-4
2.2.1 Cassette holder ..................................................... 2-4
2.2.2 A/C head ............................................................... 2-5
2.2.3 Guide arm, pinch roller arm .................................. 2-6
2.2.4 Idler arm, idler gear 1/2 ......................................... 2-6
2.2.5 Main brake(T), brake lever, tension arm,reel disk(S/T), Rec safety lever ... 2-6
2.2.6 Press lever, control cam, capstan brake assembly,loading motor assembly . 2-7
2.2.7 Capstan motor, load gear, control plate ................ 2-8
2.2.8 Clutch unit assembly, direct gear .......................... 2-9
2.3 Mechanism timing chart ............................................ 2-10
5. PARTS LIST
5.1 PACKING AND ACCESSORY ASSEMBLY<M1> ....... 5-1
5.2 FINAL ASSEMBLY<M2> ............................................. 5-2
5.3 MECHANISM ASSEMBLY<M4> ................................. 5-4
5.4 ELECTRICAL PARTS LIST ......................................... 5-6
MAIN BOARD ASSEMBLY<03> ..................................... 5-6
2D DIGITAL BOARD ASSEMBLY<05> ......................... 5-12
A/C HEAD BOARD ASSEMBLY<12> ........................... 5-13
REAR S JACK BOARD ASSEMBLY<29> ..................... 5-13
FRONT S JACK BOARD ASSEMBLY<36> .................. 5-13
ADV.JOG/SW BOARD ASSEMBLY<38> ...................... 5-13
LOADING MOTOR BOARD ASSEMBLY<55> .............. 5-13
R.PAUSE BOARD ASSEMBLY<99> ............................. 5-13
3. ADJUSTMENT
3.1 Before adjustment ........................................................ 3-1
3.1.1 Precaution ............................................................. 3-1
3.1.2 Required test equipments ..................................... 3-1
3.1.3 Required adjustment tools .................................... 3-1
3.1.4 Color(colour) bar signal, color(colour) bar pattern 3-1
3.1.5 Switch settings ...................................................... 3-1
3.1.6 Manual tracking mode (Auto tracking ON/OFF) setting 3-2
3.1.7 EVR adjustment .................................................... 3-2
3.2 Mechanism compatibility adjustment .......................... 3-2
3.2.1 Tension pole position ............................................. 3-2
3.2.2 FM waveform linearity ........................................... 3-3
3.2.3 Height and tilt of the A/C head .............................. 3-3
3.2.4 A/C head phase(X-value) ...................................... 3-4
3.3 Electrical adjustment ................................................... 3-4
3.3.1 Servo circuit .......................................................... 3-4
3.3.1.1 Switching point ................................................. 3-4
3.3.1.2 Slow tracking preset ......................................... 3-4
3.3.2 Video circuit ........................................................... 3-5
3.3.2.1 EE Y/PB Y (S-VHS/VHS)level .......................... 3-5
3.3.3 Audio circuit ........................................................... 3-5
3.3.3.1 Audio REC FM ................................................. 3-5
The following table lists the differing point(s) between models HR-S5901U, HR-S5911U, and HR-S5911U(C).
ITEM
BODY COLOR
Note(s): Mark
MODEL
HR-S5901U
BLACK
is same as left.
HR-S5911U
PURE-SILVER
HR-S5911U(C)
Important Safety 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.
v Precautions
during Servicing
12. Crimp type wire connector
In such cases as when replacing the power transformer in sets
where the connections between the power cord and power
transformer 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.
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.
symbol and shaded (
) parts are
2. Parts identified by the
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.
1) Connector part number : E03830-001
2) Required tool : Connector crimping tool of the proper type
which will not damage insulated parts.
3) Replacement procedure
(1) Remove the old connector by cutting the wires at a point
close to the connector.
Important : Do not reuse a connector (discard it).
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:
1) Wires covered with PVC tubing
2) Double insulated wires
3) High voltage leads
cut close to connector
Fig.3
5. Use specified insulating materials for hazardous live parts.
Note especially:
1) Insulation Tape
3) Spacers
5) Barrier
2) PVC tubing
4) Insulation sheets for transistors
(2) 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
6. When replacing AC primary side components (transformers,
power cords, noise blocking capacitors, etc.) wrap ends of
wires securely about the terminals before soldering.
Fig.4
(3) Align the lengths of the wires to be connected. Insert
the wires fully into the connector.
Fig.1
Metal sleeve
7. Observe that wires do not contact heat producing parts
(heatsinks, oxide metal film resistors, fusible resistors, etc.)
Connector
8. Check that replaced wires do not contact sharp edged or
pointed parts.
Fig.5
9. When a power cord has been replaced, check that 10-15 kg of
force in any direction will not loosen it.
(4) As shown in Fig.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.
Power cord
Crimping tool
1.2
5
2.0
5.5
Fig.6
Fig.2
(5) Check the four points noted in Fig.7.
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.
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.
Not easily pulled free
Crimped at approx. center
of metal sleeve
Conductors extended
Wire insulation recessed
more than 4 mm
Fig.7
1
S40888-01
v 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 table 1 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 table 1
below.
Chassis
d
d'
Power cord,
primary wire
Fig. 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 figure 9 and
following table 2.
a
Externally
exposed
accessible part
b
c
Z
V
Fig. 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 figure 10 and grounding specifications.
Exposed accessible part
AC inlet
Grounding Specifications
Region
Earth pin
Grounding Impedance (Z)
USA & Canada
Z ≤ 0.1 ohm
Europe & Australia
Z ≤ 0.5 ohm
Milli ohm meter
Fig. 10
Region
AC Line Voltage
100 V
100 to 240 V
110 to 130 V
110 to 130 V
200 to 240 V
Insulation Resistance (R)
R ≤ 1 MΩ/500 V DC
Japan
USA & Canada
Europe & Australia
1 MΩ ≥ R ≥ 12 MΩ/500 V DC
R ≤ 10 MΩ/500 V DC
Dielectric Strength
AC 1 kV 1 minute
AC 1.5 kV 1 miute
AC 1 kV 1 minute
AC 3 kV 1 minute
(Class 2)
AC 1.5 kV 1 minute
(Class 1)
Clearance Distance (d), (d')
d, d' ≤ 3 mm
d, d' ≤ 4 mm
d, d' ≤ 3.2 mm
d ≤ 4 mm
d' ≤ 8 mm (Power cord)
d' ≤ 6 mm (Primary wire)
Table 1 Specifications for each region
AC Line Voltage
Region
100 V
Japan
110 to 130 V
USA & Canada
110 to 130 V
220 to 240 V
Load Z
Leakage Current (i)
a, b, c
i ≤ 1 mA rms
Exposed accessible parts
i ≤ 0.5 mA rms
Exposed accessible parts
2 kΩ
i ≤ 0.7 mA peak
i ≤ 2 mA dc
Antenna earth terminals
50 kΩ
i ≤ 0.7 mA peak
i ≤ 2 mA dc
Other terminals
1 kΩ
Europe & Australia
0.15 µF
1.5 kΩ
Table 2 Leakage current specifications for each region
Note: These tables are unofficial and for reference only. Be sure to confirm the precise values for your particular country and locality.
2
S40888-01
SECTION 1
DISASSEMBLY
1.1 Manually removing the cassette tape
If you cannot remove the cassette tape which is loaded because of any electrical or mechanical failures, manually remove
it by taking the following steps.
(1) Unplug the power cord plug from the power outlet.
(2) Refer to the disassembly procedure of the VCR and perform
the disassembly of the major parts before removing the
mechanism assembly. (See Fig. 1-1a.)
(3) Unload the pole base assembly by manually turning the gear
of the loading motor until the pole base assembly is hidden
behind the cassette lid. In doing so, hold the tape by the hand
to keep the slack away from any grease. (See Fig. 1-1b.)
In case of mechanical failures, while keeping the tension arm
assembly free from tension, pull out the tape on the pole
base assembly. Take the spring(a) of the pinch roller arm
assembly off the hook, and detach it from the tape.
(4) Remove the screw (a) of the side frame (L/R).
(5) Hold the slack tape and cassette cover together, lift the
cassette tape, top frame, cassette holder and side frames
(L, R) together from the rear and remove them by disengaging the hooks (a) and (b).
Screw(a)
Cassette tape
Cassette holder
Top frame
Side frame(R)
Screw(a)
Fig. 1-1a
Tension arm assembly
Pole base assembly Pinch roller arm assembly
Hook(a)
Hook(b)
Side frame(L)
Fig. 1-1c
(6) Take up the slack of the tape into the cassette. This completes removal of the cassette tape.
Spring(a)
Direction of unloading
Fig. 1-1b
1-1
1.2 Removing the major parts
1.2.1
How to read the procedure table
This table shows the steps for disassembly of the externally
furnished parts and board assemblies. Reverse these steps
when re-assembling them.
Door
opener
Side
frame(R)
<Example>
Step/
Part Name
Loc No.
[1] Top cover,
Bracket
(1)
(2)
Fig.
Point
Note
No.
1-3a 4(S1a),(S1b),3(L1a), <Note 1a>
2(SD1a),(P1a),(W1a),
CN1(WR1a),
---------------------------------------2(S1c)
(3)
(4)
(5)
(1) Order of steps in Procedure
When reassembling, perform the step(s) in the reverse order.
These numbers are also used as the identification (location) No. of
parts Figures.
(2) Part name to be removed or installed.
(3) Fig. No. showing procedure or part location.
(4) Identification of part to be removed, unhooked, unlocked,
released, unplugged, unclamped or unsoldered.
P= Spring, W= Washer, S= Screw, L= Locking tab, SD= Solder,
CN**(WR**)= Remove the wire (WR**) from the connector (CN**).
Note:
• The bracketed ( ) WR of the connector symbol are assigned nos. in priority order and do not correspond to
those on the spare parts list.
Switch
knob
Fig. 1-2-2a
<Note 3a>
• When reattaching the Mechanism assembly, secure the screws
(S3a to S3b) in the order of a, b.
<Note 3b>
• When reattaching the Mechanism assembly, be sure to align
the phase of the Rotary encoder on the Main board assembly.
• When reattaching the Mechanism assembly, set the “Mechanism assembling mode”. (See “section 2 mechanism”.)
• When reattaching the Mechanism assembly to the Main board
assembly, take care not to damage the sensors and switch on
the Main board assembly.
<Note 3c>
• When reattaching the Drum assembly, secure the screws (S3c
to S3e) in the order of c, d, e.
(S3d)
(S3c)
(S3e)
(S3e)
Mechanism
assembly
(S3d)
Drum
assembly
<Note 3c>
(5) Adjustment information for installation
Fig.
Point
No.
1-2-2d 3(S1a), 2(L1a)
1-2-2d 2(S2a), 4(L2a), 3(L2b),
1-2-2a CN7001(WR2a),
CN7103(WR2b)
-------------------------3(S2b), Knob assembly
(Adv. Jog/SW board assembly)
--------------------------(Front S Jack board assembly)
2(S2c)
Mechanism assembly
1-2-2d CN2001(WR3a),
(S3a), (S3b)
-------------------------(Drum Shield)
(S3f), (L3a)
-------------------------(Drum assembly)
1-2-2b CN1(WR3b),
1-2-2c (S3c), (S3d), (S3e)
Main board assembly
1-2-2d 2(L4a), (L4b), 2(L4c)
Rear S Jack board assembly
[3]
[4]
Note
<Note 2a>
<Note 2b>
<Note 2a>
<Note 3a>
<Note 3b>
<Note 3c>
<Note 2a>
• Be careful not to damage the connector and wire etc. during
connection and disconnection.
• When connecting the flat wire to the connector, be careful with
the flat wire direction.
<Note 2b>
• When reattaching the Front panel assembly, make sure that
the door opener of the Side frame (R) is lowered in position
prior to the reinstallation.
• When reattaching the Front panel assembly, pay careful attention to the switch lever of the Front panel assembly not to make
it touch the switch knob of the Main board assembly from the
side.
• When reattaching the Front panel assembly, lift the Cassette
door slightly.
1-2
(S3c)
HOOK
<NOTE>
Attach the Drum assembly appropriately,
since the installation state of the Drum assembly
influences the FM WAVEFORM LINEARITY
greatly.
1.2.2 Disassembly procedure
Step/
Part Name
Loc No.
[1] Top cover
[2] Front panel assembly
Switch
lever
Fig. 1-2-2b
• When handling the drum assembly alone, hold it by the motor
or shaft. Be careful not to touch other parts, especially the video
heads. Also take care not to damage the connectors.
Shaft
Motor
Video heads
Fig. 1-2-2c
(S1a)
Slot to fit at (L3a) of the Bottom chassis.
NOTE) After screwing,execute the
adjustment inspection of the tape running.
(S3f)
Mechanism
assembly
[3] Drum shield
(S2a)
Drum
Screw(S3f)
e
[3] Drum assembly
<Note 3c>
(S3a)
<Note 3a>
FE head
Pole base
(Supply)
(S2a)
[3] Mechanism
assembly
<Note 3b>
Drum shield
(WR3a)
<Note 2a>
(S3b)
<Note 3a>
b
[1] Top cover
Pole base
(Take up)
REAR SIDE
Hang the hook of the Terminal board (L4c)
in hole of Bottom chassis.
(L1a)
(L1a)
b
[4] Rear S Jack
d
board assembly
(S3e)
<Note 3c>
(S3d)
<Note 3c>
(S3c)
<Note 3c>
c
b
[4] Main board
assembly
2
00
Q3
NOTE) Hang the hook of the Top cover
in hold of Bottom chassis.
Must confirm soldering condition as no soldering and dry soldering
at portion of Power cord lead on Main board assembly before attach Main board assembly to Bottom chassis.
1
CN
JS3001
1
00
D3
01
30
JS
Switch knob
<Note 2b>
Bottom chassis
d
CN
1
00
Q3
50
01
Accord the position of V gap on R. Encoder and PWB silk " ".
Accord the position of Boss on R. Encoder and PWB silk " ".
NOTE) When you fix S Jack board assembly with the screw,
put jig under Front panel assembly.
Back side of Front panel assembly [2] Front S Jack
(S2b)
board assembly
[2] Adv. Jog/SW board assembly
(L4b)
e
c
(L3a)
[2] Front panel
assembly
<Note 2b>
(L2a)
(WR2b)
<Note 2a>
b
z
z
(L2b)
back side
Switch lever
<Note 2b>
back side
(S2c)
NOTE) 1. Insert FFC wire to the connector before attaching Front
S Jack board assembly to Front panel assembly.
2. Fig. 1 reference
NOTE) Insert FFC wire to the connector before attaching
Adv. Jog/SW board assembly to Front panel assembly.
(WR2a)
<Note 2a>
20mm
(L2a)
Cassette door
<Note 2b>
30mm
(L2b)
. Power cord arrangement should be following drawing.
[2] Knob assembly
from Capstan MDA board assembly
Absorb the looseness the wire in the
(WR3b)
S Jack side.
<Note 2a> right side
Power cord should not be touch to
the VA5001 and C5001.
WHITE
LINE
1. Insert direction of FFC WIRE as follows.
CN2001
FW7104
60mm
NOTE
Fig.1
1
1
FW7107
C903
WHITE
LINE
VA5001
right side
supporting side
electrode side
A
VR2251
back side
C5001
2. FFC WIRE and DRUM FPC WIRE should be insert as follows.
right side
NG
OK
90°
CN
CN
CN
DETAIL " B "
DETAIL " A "
right side
CN7103
back side
CN7001
• The wire of FW3001 or FW3002
should not approach the moving
parts of Mechanism assembly.
• Absurb the looseness of the wire
on the Tuner side.
B
from Front S Jack
board assembly
(L4a)
Hang the hook of Bottom chassis on the Main board assembly.
from Adv. Jog/SW
board assembly
Bend the wire by the root.
F
FW W7
71 104
07
2D DIGITAL
1
1
CN7103
FW3001
FW3002
Fig. 1-2-2d
1-3
1.3 Emergency display function
This unit saves details of the last two emergencies as the EMG
history and allows the status of the VCR and the mechanism
of each emergency to be shown both on the display and as
OSD information.
When using the emergency function, it is required to set the
VCR to the Jig RCU mode (the mode in which codes from the
Jig RCU can be received).
Jig RCU
[Data transmitting method]
Depress the “ ” ( 3 ) button
after the data code is set.
0 : 00 : 00 Normal display (Counter or clock)
E: * * : * *
EMG content display (E:Latest:Previous)
[EMG code display mode]
See 1.3.4.
*1: *2 : 34 EMG detail information <1> display
[Deck and other mode display mode]
See 1.3.5.
*5: *6 : *7 EMG detail information <2> display
[Cassette display mode]
See 1.3.6.
*8: *9 : *10 EMG detail information <3> display
[Deck mode history dispaly mode]
See 1.3.7.
INITIAL MODE
CUSTOM CODE
43: A CODE
Fig. 1-3-1b EMG display of FDP display model
DATA CODE
Fig. 1-3a Jig RCU [PTU94023B]
(1) Transmit the code “59” from the Jig RCU.
The FDP shows the EMG content in the form of “E: * * : * * ”.
1.3.1 Displaying the EMG information
The EMG detail of information can be displayed by transmitting the code "59" from the Jig RCU.
Note:
• The EMG detail information <1><2> show the information on
the latest EMG.
It becomes “ – – : – – : – –” when there is no latest EMG
record.
<Example 1>
Normal display
E: * *
EMG content display (Latest)
See 1.3.4.
EMG content display (Previous)
See 1.3.4.
1: * 1
EMG detail information <1>
See 1.3.5.
[Deck operation mode]
2: * 2 EMG detail information <1>
See 1.3.5.
[Mechanism operation mode]
3: 34 EMG detail information <1>
See 1.3.5.
[Mechanism sensor information and Mechanism mode position]
See 1.3.6.
4: * 5 EMG detail information <2>
[Type of the cassette tape in use <1>]
See 1.3.6.
5: * 6 EMG detail information <2>
[Winding position of the cassette tape in use]
See 1.3.6.
6: * 7 EMG detail information <2>
[Type of the cassette tape in use <2> (Winding area)]
See 1.3.7.
7: * 8 EMG detail information <3>
[Previous deck operation mode]
See 1.3.7.
8: * 9 EMG detail information <3>
[The deck operation mode of the one before the last]
See 1.3.7.
9: * 1 0 EMG detail information <3>
[The deck operation mode of the one prior to one above]
Previous EMG
Latest EMG
<Example 2>
E : –– : ––
No EMG record
* 1 : Deck operation mode at the moment of EMG
* 2 : Mechanism operation mode at the moment of EMG
3– : Mechanism sensor information at the moment of
EMG
–4 : Mechanism mode position at the moment of EMG
(3) Transmit the code “59” from the Jig RCU once again.
The FDP shows the EMG detail information <2> in the form
of “ * 5 : * 6 : * 7 ”.
* 5 : Type of the cassette tape in use <1> .
* 6 : Winding position of the cassette tape in use
* 7 : Type of the cassette tape in use <2> (Winding area)
(4) Transmit the code “59” from the Jig RCU once again.
The FDP shows the EMG detail information <3> in the form
of “*8 : *9 : *10”.
* 8 : Previous deck operation mode at the moment of
EMG
* 9 : The deck operation mode of the one before the last
at the moment of EMG
* 10 : The deck operation mode of the one prior to one
above at the moment of EMG
(5) Transmit the code “59” from the Jig RCU once again to reset the display.
1.3.2
Fig. 1-3-1a EMG display of 7segment LED display model
1-4
E : 01 : 03
(2) Transmit the code “59” from the Jig RCU again.
The FDP shows the EMG detail information <1> in the form
of “ * 1 : * 2 : 34 ”.
0: 00
1E: * *
<Reference> EMG display of FDP display mode
Clearing the EMG history
(1) Display the EMG history.
(2) Transmit the code “36” from the Jig RCU.
(3) Reset the EMG display.
1.3.3 Details of the OSD display in the EMG display mode
[For *HD only]
During the EMG display, the OSD shows the data on the deck
mode, etc. The details of the display contents are as follows.
Notes:
• The display is variable depending on the part No. of the
System Control microcomputer (IC3001) built into the
VCR. In the following, refer to the figure carrying the same
two characters as the top two characters of the part
number of your IC.
• The sensor information in the OSD display contents is partially different from the mechanism sensor information in
EMG detail information <1>.
AA
BB
CC
DD
EE
FF
GG
HH
I I
JJ
KK
LL
MM
NN
OO
PP
AA
BB
CC
DD
EE
FF
GG
HH
I I
JJ
KK
LL
MM
NN
OO
PP
QQ
RR
SS
TT
UU
VV
WW
XX
YY
HHHH :
I I:
J J J J:
KKKK:
LLLL:
MMMM :
: Deck operation mode (See EMG detail information <1>.)
: Mechanism operation mode (See EMG detail of information <1>.)
: Mechanism transition flag
: Capstan motor control status
: Loading motor control status
: Sensor information (See sensor information details.)
: Capstan motor speed
: Key code (JVC code)
: Supply reel winding diameter data, higher 8 bits.
: Supply reel winding diameter data, lower 8 bits.
: Mechanism sensor information & mechanism mode position
(See EMG detail of information <1>.)
: Tape speed data, higher 8 bits.
: Tape speed data, lower 8 bits.
: Cassette tape type <2>, higher 8 bits.
(See EMG detail of information <2>.)
: Cassette tape type <2>, lower 8 bits.
(See EMG detail of information <2>.)
: General data display area
BB
CC
EE
FF
GGGG
HHHH
I I
JJJJ
KKKK
LLLL
MMMM
ROM No.
AA :
BB :
CC :
DD :
EE :
FF:
GGGG:
[For MN* only]
AA
DD
Key code (JVC code)
Deck operation mode (See EMG detail information <1>.)
Mechanism operation mode (See EMG detail information <1>.)
Sensor information (See sensor information details.)
Capstan motor speed (Search, double speed)
Tracking value
Cassette tape type <2>, 16 bits.
(See EMG detail information <2>.)
Supply reel winding diameter data
Capstan motor speed (FF/REW, double speed)
Tape speed data, lower 8 bits.
General data display area
General data display area
General data display area
*DD: Sensor information details
<Display>
** h
*
*
*
*
*
*
*
*
Encoder data
(See Mechanism mode sequence.)
Remote pause
End sensor
Start sensor
Cassette tab present = 1
Cassette tab broken = 0
[For both MN*/HD*]
Mechanism mode sequence
Y Y : General data display area
Mechanism mode - Encoder data
*FF: Sensor information details
1
2
3
4
5
6
7
8
9
10
11
LSA
<Display>
** h
LSB
LSC
*
*
*
*
*
*
*
LSD
Encoder output = Low
or
Trerminal - GND = SHORT
Encoder data
(See Mechanism mode sequence.)
Cassette tab present = 1
Cassette tab broken = 0
Cassette absent = 1
Cassette present = 0
Start sensor
End sensor
No.
1
2
3
4
5
6
7
8
9
10
11
12
Position
EJECT
EJECT1
EJECT2
ULSTOP
UPPER
ONSTOP(PLAY)
FWD/SS
REV/SS
OFFSTOP
FFREW-BRAKE
FFREW
MIDDLE
Encoder output = High
or
Trerminal - GND = OPEN
Encoder data
0 h = 0000
1 h = 0001
2 h = 0010
3 h = 0011
4 h = 0100
5 h = 0101
6 h = 0110
7 h = 0111
8 h = 1000
9 h = 1001
A h = 1010
F h = 1111
LSD
LSC
LSB
LSA
GND
*
5 4 3 2 1
1-5
1.3.4
EMG content description
Note: EMG contents “E08/E09” are for the model with Dynamic Drum (DD).
FDP
CONTENT
CAUSE
E01: Loading EMG
If the mechanism mode does not change to the next mode within 4 seconds after the loading motor starts rotating in the loading direction, while
the mechanism is in the after-loading position (with the tape up against
the pole base), [E:01] is identified and the power is switched OFF.
However, if the tape loading is not completed within 4 seconds after
the loading motor starts rotating in the loading direction, the tape is
simply unloaded and ejected. No EMG data is recorded in this case.
1. The mechanism is locked in the middle of the mode transition during a tape loading operation.
2. The mechanism overruns during the tape loading operation because the SYSCON cannot recognize
the mechanism mode normally. This problem is due to a cause such as a rotary encoder failure.
3. Power is not supplied to the loading MDA. (M12V/Vcc/Vref/ICP are disconnected in
the middle.)
E02: Unloading EMG
When the mechanism mode cannot be changed to another mode
even when the loading motor has rotated for more than 4 seconds in the unloading direction, [E:02] is identified and the power
is turned off.
1. The mechanism is locked in the middle of mode transition.
2. Without an eject signal being sent from the SYSCON, unloading is attempted (i.e. Ejection is attempted while the tape is still inside the mechanism.) because the SYSCON
cannot recognize the mechanism mode normally. This is due to a cause such as a
rotary encoder failure. (Mechanism position: UPPER)
3. Power is not supplied to the loading MDA. (M12V/Vcc/Vref/ICP are disconnected in the middle.)
E03: Take Up Reel
Pulse EMG
When the falling edje of the take-up reel pulse has not been generated for more than 4 seconds in the capstan rotating mode,
[E:03] is identified, the pinch rollers are turned off and stopped,
and the power is turned off. In this case, however, the mechanism should be in position after tape loading. Note that the reel
EMG is not detected during Slow/Frame advance operations.
1. The take-up reel pulse is not generated in the FWD transport modes (PLAY/FWD
SEARCH/FF, etc.) because;
1)The idler gear is not meshed with the take-up reel gear because the mechanism malfunctions for some reason.
2)The idler gear is meshed with the take-up reel gear, but incapable of winding due to
too large mechanical load (abnormal tension);
3)The reel is rotating normally but an FG pulse is not generated due to the take-up reel
sensor failure.
2. The supply reel pulse is not generated in the REV transport modes (REV SEARCH/
REW, etc.) because;
1) The idler gear is not meshed with the supply reel gear because the mechanism malfunctions for some reason.
2) The idler gear is meshed with the supply reel gear, but incapable of winding due to
too large a mechanical load (abnormal tension);
3) The reel rotates normally but the FG pulse is not generated due to a supply reel
sensor failure.
3. Power(SW5V) is not supplied to the reel sensor on the tape winding side.
E04: Drum FG EMG
When the drum FG pulse has not been input for more than 3 seconds in the drum rotating mode, [E:04] is identified, the pinch rollers are turned off and stopped, and the power is turned off.
1. The drum could not start or the drum rotation has stopped due to too large a load on
the tape, because;
1) The tape tension is abnormally high;
2) The tape is damaged or a foreign object (grease, etc.) adheres to the tape.
2. The drum FG pulse did not reach the System controller CPU because;
1) The signal circuit is disconnected in the middle;
2) The FG pulse generator (hall device) of the drum is faulty.
3. The drum control voltage (DRUM CTL V) is not supplied to the MDA.
4. Power (M12V) is not supplied to the drum MDA.
E05: Cassette Eject
EMG
If the cassette does not reach the eject position within about 0.7
seconds after the cassette housing has started the cassette ejection operation, [E:05] is identified, the drive direction is reversed
to load the tape, the mode is switched to STOP mode with the
pinch roller OFF, and the power is switched OFF.
During the cassette insertion process, the drive direction is reversed
and the cassette is ejected if the tape is not up against the pole
base within about 3 seconds after the start of the cassette pullingin operation. If the cassette does not reach the eject position within
about 0.7 seconds after the drive mode reversal operation, [E:05]
is identified and the power is switched OFF immediately.
1. The cassette cannot be ejected due to a failure in the drive mechanism of the housing.
2. When the housing load increases during ejection, the loading motor is stopped because
of lack of headroom in its drive torque.
Housing load increasing factors: Temperature environment (low temperature, etc.),
mechanism wear or failure.
3. The sensor/switch for detecting the end of ejection are not functioning normally.
4. The loading motor drive voltage is lower than specified or power (M12V) is not supplied to the motor (MDA).
5. When the user attempted to eject a cassette, a foreign object (or perhaps the user's
hand) was caught in the opening of the housing.
E06: Capstan FG
EMG
When the capstan FG pulse has not been generated for more
than 1 second in the capstan rotating mode, [E:06] is identified,
the pinch rollers are turned off and stopped, and the power is
turned off.However, the capstan EMG is not detected in SLOW/
STILL modes.
Note that, if the part number of the System Control IC begins with
“MN” or “M3”, the capstan EMG is not detected even during the
FF/REW operation.
1. The capstan could not start or the capstan rotation has stopped due to too large a load
on the tape, because;
1) The tape tension is abnormally high (mechanical lock);
2) The tape is damaged or a foreign object (grease, etc.) is adhered to the tape (occurrence of tape entangling, etc.).
2. The capstan FG pulse did not reach the System controller CPU because;
1) The signal circuit is disconnected in the middle;
2) The FG pulse generator (MR device) of the capstans is faulty.
3. The capstan control voltage (CAPSTAN CTL V) is not supplied to the MDA.
4. Power (M12V, SW5V) are not supplied to the capstan MDA.
E07: SW Power
Short-Circuit
EMG
When short-circuiting of the SW power supply with GND has lasted
for 0.5 second or more, [E:07] is identified, all the motors are
stopped and the power is turned off.
1. The SW 5 V power supply circuit is shorted with GND.
2. The SW 12 V power supply circuit is shorted with GND.
E08:
DD Initialized
(Absolute
Position
Sensor) EMG
When DD tilting does not complete in 4 seconds, [E:08] is identified, the tilt motor is stopped and the power is turned off.
1. The absolute value sensor is defective. (The soldered parts have separated.)
2. The pull-up resistor at the absolute sensor output is defective. (The soldered parts have separated.)
3. Contact failure or soldering failure of the pins of the connector (board-to-board) to the absolute value
sensor.
4. The absolute value sensor data is not sent to the System Controller CPU.
E09:
DD FG EMG
When the DD FG pulse is not generated within 2.5 seconds, [E:09]
is identified, the tilt motor is stopped and the power is turned off.
1.
2.
3.
4.
5.
6.
7.
8.
9.
When the falling edge of the supply reel pulse has not been generated for more than 10 seconds in the capstan rotating mode,
[E:0A] is identified and the cassette is ejected (but the power is
not turned off). In this case, however, the mechanism should be
in the position after tape loading (with the tape up against the pole
base). Also note that the reel EMG is not detected during Slow/
Frame advance operations.
1. The supply reel pulse is not generated in the FWD transport mode (PLAY/FWD
SEARCH/FF, etc.) because;
1) PLAY/FWD or SEARCH/FF is started while the tape in the inserted cassette is cut in
the middle;
2) A mechanical factor caused tape slack inside and outside the supply reel side of the
cassette shell. In this case, the supply reel will not rotate until the tape slack is removed by the FWD transport, so the pulse is not generated until then;
3) The reel is rotating normally but the FG pulse is not generated due to a supply reel
sensor failure.
2. The take-up reel pulse is not generated in the REV transport mode (REV SEARCH/
REW, etc.).
1) REV SEARCH/REW is started when the tape in the inserted cassette has been cut
in the middle;
2) A mechanical factor caused tape slack inside and outside the take-up reel side of
the cassette shell. In this case, the supply reel will not rotate until the tape slack is
removed by the REV transport, so the pulse will not be generated until that time;
3) The reel is rotating normally but the FG pulse is not generated due to a take-up reel
sensor failure.
3. The power (SW 5V) to a reel sensor is not supplied.
E0A: Supply Reel
Pulse EMG
EU1:
Head clog warning
history
1-6
The FG sensor is defective. (The soldered parts have separated.)
The pull-up resistor at the FG sensor output is defective. (The soldered parts have separated.)
Contact failure or soldering failure of the pins of the connector (board-to-board) to the FG sensor.
The power (5V) to the sensor is not supplied. (Connection failure/soldering failure)
The FG pulse is not sent to the System Controller CPU.
The tilt motor is defective. (The soldered parts have separated.)
The drive power to the tilt motor is not supplied. (Connection failure/soldering failure)
The tilt motor drive MDA - IC is defective.
Auto-recovery of the DD tilting cannot take place due to overrun.
Presupposing the presence of the control pulse output in the PLAY mode, when the value obtained by mixing the two V.FM output channels (without regard
to the A.FM output) has remained below a certain threshold level for more than 10 seconds, [E:U1] is identified and recorded in the emergency history.
During the period in which the head clog is detected, the FDP shows "U:01" and the OSD repeats the “3 seconds of warning display” and the “7 seconds of
noise picture display” alternately.
EMG code : “E:C1” or “E:U1” / FDP : “U:01” / OSD : “Try cleaning tape.” or “Use cleaning cassette.”
The head clog warning is reset when the above-mentioned threshold has been exceeded for more than 2 seconds or the mode is changed to another mode
than PLAY.
Table 1-3-4a
1.3.5
EMG detail information <1>
The status (electrical operation mode) of the VCR and the status
(mechanism operation mode/sensor information) of the mechanism
in the latest EMG can be confirmed based on the figure in EMG
detail information <1> .
[FDP/OSD display]
* 1 : * 2 : 34
*1 :
*2 :
3– :
–4 :
Deck operation mode at the moment of EMG
Mechanism operation mode at the moment of EMG
Mechanism sensor information at the moment of EMG
Mechanism mode position at the moment of EMG
Note:
• For EMG detailed information <1>, the content of the code
that is shown on the display (or OSD) differs depending on
the parts number of the system control microprocessor
(IC3001) of the VCR. The system control microprocessor parts
number starts with two letters, refer these to the corresponding table.
* 1 : Deck operation mode
[Common table of MN* and HD]
Display
MN*
HD*
00
01
02
03
04
0C
10
20
21
22
00
01
04
0E
11
22
-
24
2C
40
42
26
2E
43
-
44
4C
6C
84
85
8C
8D
8E
AC
AD
CC
CD
EC
ED
47
4C
6E
84
85
8F
AF
CD
EF
-
* 2 : Mechanism operation mode
[Table of MN*]
Display
00
01
02
03
04
05
06
07
08
09
0A
0B
0C
0D
0E
0F
10
11
12
13
14
15
16
17
[Table of HD*]
Display
Deck operation mode
Mechanism being initialized
STOP with pinch roller pressure off (or tape present with P.OFF)
STOP with pinch roller pressure on
POWER OFF as a result of EMG
PLAY (Normal playback)
REC
Cassette ejected
FF
Tape fully loaded, START sensor ON, short FF
Cassette identification FWD SEARCH before transition to FF (SP
x7-speed)
FWD SEARCH (variable speed) including x2-speed
INSERT REC
REW
Cassette identification REV SEARCH before transition to REW (SP
x7-speed)
REV SEARCH (variable speed)
AUDIO DUB
INSERT REC (VIDEO + AUDIO)
FWD STILL / SLOW
REV STILL / SLOW
REC PAUSE
Back spacing
Forward spacing (FWD transport mode with BEST function)
INSERT REC PAUSE
INSERT REC back spacing
AUDIO DUB PAUSE
AUDIO DUB back spacing
INSERT REC (VIDEO + AUDIO) PAUSE
INSERT REC (VIDEO + AUDIO) back spacing
Mechanism operation mode
Command standby (No command to be executed)
Immediate Power OFF after EMG occurrence
Loading from an intermediate position during mechanism initialization
Unloading due to EMG occurrence during mechanism initialization
Ejecting cassette (ULSTOP to EJECT)
Inserting cassette (EJECT to ULSTOP)
Loading tape (ULSTOP to PLAY)
Unloading tape (PLAY to ULSTOP)
Transition from pinch roller ON to STOP
Transition from pinch roller OFF to STOP (PLAY to OFFSTOP)
Transition from pinch roller OFF to STOP at power OFF
Transition from pinch roller ON to STOP at power ON
Transition to PLAY
Transition to Search FF
Transition to REC
Transition to FWD STILL/SLOW
Transition to REV STILL/SLOW
Transition to Search REV
Transition from FF/REW to STOP
Transition to FF
Transition to REW
Tape end detection processing during loading
Short FWD/REV at tape sensor ON during unloading
Transition to FF/REW brake mode
00
01
02
04
05
0E
11
22
26
2E
43
47
4C
6E
84
85
8F
AF
C7
CD
EF
F0
F1
F2
F3
F4
F5
F6
F7
F8
F9
FA
FB
FC
FD
FE
FF
Mechanism operation mode
STOP with pinch roller pressure off
STOP with pinch roller pressure on
U/L STOP (or tape being loaded)
PLAY (Normal playback)
PLAY (x1-speed playback using JOG)
REC
Cassette ejected
FF
FWD SEARCH (variable speed) including x2-speed
INSERT REC
REW
REV SEARCH
AUDIO DUB
INSERT REC (VIDEO + AUDIO)
FWD STILL/SLOW
REV STILL/SLOW
REC PAUSE
INSERT REC PAUSE
REV SEARCH (x1-speed reverse playback using JOG)
AUDIO DUB PAUSE
INSERT REC (VIDEO + AUDIO) PAUSE
Mechanism being initialized
POWER OFF as a result of EMG
Cassette being inserted
Cassette being ejected
Transition from STOP with pinch roller pressure on to STOP with pinch roller
pressure off
Transition from STOP with pinch roller pressure on to PLAY
Transition from STOP with pinch roller pressure on to REC
Cassette type detection SEARCH before FF/REW is being executed
Tape being unloaded
Transition from STOP with pinch roller pressure off to STOP with pinch roller
pressure on
Transition from STOP with pinch roller pressure off to FF/REW
Transition from STOP with pinch roller pressure off to REC.P (T.REC,etc.)
Transition from STOP with pinch roller pressure off to cassette type detection SEARCH
Short REV being executed after END sensor on during unloading
Tension loosening being executed after tape loading (STOP with pinch roller
pressure on)
Tape being unloaded
1-7
3– : Mechanism sensor information
[Common table of MN* and HD*]
* 5 : Cassette tape type <1>
Display
Mechanism sensor information
Display
REC safety SW
0123456789ABCDEF-
Tab broken
Tab broken
Tab broken
Tab broken
Tab present
Tab present
Tab present
Tab present
Tab broken
Tab broken
Tab broken
Tab broken
Tab present
Tab present
Tab present
Tab present
Tab broken = 0
Tab present = 1
Start sensor
End sensor
Mechansim
position sensor
ON
ON
ON
ON
OFF
OFF
OFF
OFF
ON
ON
ON
ON
OFF
OFF
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
Sensor ON = 0
sensor OFF = 1
Sensor ON = 0
Sensor OFF = 1
–4 : Mechanism mode position
[Common table of MN* and HD*]
Mechanism Dissensor
play
information
Even number
(0, 2, 4, 6, 8,
A, C, E)
Odd number
(1, 3, 5, 7, 9,
B, D, F)
1.3.6
-0
-1
-2
-3
-4
-5
-6
-7
-8
-9
-A
-B
-C
-D
-E
-F
-0
-1
-2
-3
-4
-5
Deck operation mode
Not established
EJECT
EJECT position
EJECT-EJECT1
Intermodal position
EJECT1
EJECT1 position
EJECT1-EJECT2 Intermodal position
EJECT2
EJECT2 position
EJECT2-ULSTOP Intermodal position
ULSTOP
ULSTOP position
ULSTOP-UPPER Intermodal position
UPPER
Loading (unloading) tape
UPPER-ONSTOP Intermodal position
ONSTOP
PLAY position
PLAY-FWD/SS
Intermodal position
FWD/SS
FWD (FWD Still/Slow) position
FWD/SS-REV
Intermodal position
REV
REV (REV Still/Slow) position
REV-OFFSTOP
Intermodal position
OFFSTOP
Pinch roller OFF position
OFFSTOP-FFREWB Intermodal position
FFREWB
FF/REW Brake position
FFREWB-FFREW Intermodal position
FFREW
FF/REW position
EMG detail information <2>
The type of the cassette tape and the cassette tape winding position can be confirmed based on the figure in EMG detail information <2> .
[FDP/OSD display]
*5 : *6
*5 :
*6 :
*7 :
: *7
Type of the cassette tape in use <1>
Winding position of the cassette tape in use
Type of the cassette tape in use <2> (Winding area)
Note:
• EMG detail information <2> is the reference information
stored using the remaining tape detection function of the cassette tape. As a result, it may not identify cassette correctly
when a special cassette tape is used or when the tape has
variable thickness.
1-8
00
16
82
84
92
93
C3
D3
E1
E2
E9
F1
Cassette tape type <1>
Cassette type not identified
Large reel/small reel (T-0 to T-15/T-130 to T-210) not classified
Small reel, thick tape (T-120) identified/thin tape (T-140) identified
Large reel (T-0 to T-60) identified
Small reel, thick tape (T-130) identified/thin tape (T-160 to T-210) identified
Small reel, thick tape/C cassette (T-0 to T-100/C cassette) not classified
Small reel, thick tape/C cassette (T-0 to T-100/C cassette) being classified
Small reel, thick tape/C cassette (T-0 to T-100/C cassette) being classified
C cassette, thick tape (TC-10 to TC-20) identified
Small reel, thick tape (T-0 to T-100) identified
C cassette, thin tape (TC-30 to TC-40) identified
C cassette, thick tape/thin tape (TC-10 to TC-40) not classified
Notes:
• Cassette tape type <1> is identified a few times during mode transition and the identification count is variable depending on the cassette tape type. If an EMG occurs in the middle of identification, the
cassette tape type may not be able to be identified.
• If other value than those listed in the above table is displayed,
the cassette tape type is not identified.
* 6 : Cassette tape winding position
The cassette tape winding position at the moment of EMG is displayed by dividing the entire tape (from the beginning to the end) in
21 sections using a hex number from “00” to “14”.
“00”
“14”
“FF”
: End of winding
: Beginning of winding
: Tape position not identified
* 7 : Cassette tape type <2> (Winding area)
Display
Cassette tape type <2>
(Reference) Word data
(Beginning)
(End)
00
04 - 08
05 - 06
05 - 0C
06 - 0C
06 - 0C
07 - 08
09 - 0B
0C - 0D
0D - 0F
0E - 10
10 - 12
10 - 13
11 - 14
12 - 14
13 - 14
13 - 14
13 - 14
13 - 14
15 - 16
16 - 17
17 - 18
19 - 1B
Cassette type not identified
C cassette, thick tape
TC-10
Small reel, thick tape
T-20
C cassette, thick tape
TC-20P
C cassette, thin tape
TC-40
C cassette, thin tape
TC-30
Small reel, thick tape
T-40
Small reel, thick tape
T-60
Small reel, thick tape
T-80(DF-160)
Small reel, thick tape
T-90(DF-180)
Small reel, thick tape
T-100
Small reel, thin tape
T-140
Small reel, thick tape
T-120(DF-240)
Small reel, thick tape
T-130
Small reel, thin tape
T-160
Small reel, thin tape
T-210(DF-420)
Small reel, thin tape
T-180(DF-360)
Small reel, thin tape
T-168
Small reel, thick tape
DF-300
Large reel
T-20
Large reel
T-30
Large reel
T-40
Large reel
T-60
(0497 - 0506) (0732 - 0858)
(05A9 - 0661)
(0599 - 05FF) (0AA1 - 0C07)
(0623 - 063D) (0C41 - 0CC3)
(0611 - 0638) (0C0C - 0CB2)
(07CC - 08E5)
(09FD - 0B78)
(0C20 - 0DFC)
(0D31 - 0F3E)
(0E43 - 107F)
(10E1 - 120C)
(1073 - 1313)
(1185 - 1429)
(12D3 - 141F)
(1373 - 14C3)
(1357 - 14C0)
(1395 - 14EE)
(13A8 - 14CE)
(1536 - 1618)
(1647 - 175A)
(1759 - 189C)
(1989 - 1B2F)
Note:
• The values of cassette tape type <2> in the above table are
typical values with representative cassette tapes.
1.3.7 EMG detail information <3>
Three deck operation modes preceding the deck operation
mode in which the EMG occurs may be confirmed based on
the figures in the EMG information detail <3>. For the contents
of the displayed information, see the table "Deck operation
mode" in section "1.3.5 EMG detail information <1>".
1.4 Service position
1.5
This unit has been designed so that the Mechanism and Main
board assemblies can be removed together from the chassis
assembly. Before diagnosing or servicing the circuit boards,
take out the major parts from the chassis assembly.
This unit uses the following two modes for receiving remote
control codes.
1) User RCU mode : Ordinary mode for use by the user.
2) Jig RCU mode : Mode for use in production and servicing.
1.4.1
When using the Jig RCU, it is required to set the VCR to the
Jig RCU mode (the mode in which codes from the Jig RCU
can be received). As both of the above two modes are stored
in the EEPROM, it is required to set the VCR back to the User
RCU mode each time that an adjustment is made or to check
that the necessary operations have been completed. These
modes can be set by the operations described below.
How to set the “Service position”
(1) Refer to the disassembly procedure and perform the disassembly of the major parts before removing the Mechanism assembly.
(2) Remove the screws that fix the Mechanism assembly to the
Chassis assembly. If any other screws are used to fix the
boards, remove them also.
(3) Remove the combined Mechanism and Main board assemblies.
(4) If any other major parts are used, remove them also.
(5) Connect the wires and connectors of the major parts that
have been removed in steps (1) to (4). (Refer to Fig. 1-2-2d.)
(6) Place the combined Mechanism, Main board and other
board assemblies upside down.
(7) Insert the power cord plug into the power outlet and then
proceed with the diagnostics and servicing of the board assembly.
Notes:
• Before inserting the power cord plug into the power outlet, make sure that none of the electrical parts are able to
short-circuit between the workbench and the board assembly.
• For the disassembly procedure of the major parts and details of the precautions to be taken, see “1.2 Removing
the major parts”.
• If there are wire connections from the Main board and
Mechanism assemblies to the other major parts, be sure
to remove them (including wires connected to the major
parts) first before performing step (2).
• When carrying out diagnosis and repair of the Main board
assembly in the “Service position”, be sure to ground both
the Main board and Mechanism assemblies. If they are improperly grounded, there may be noise on the playback
picture or FDP counter display may move even when the
mechanism is kept in an inoperative status.
• In order to diagnose the playback or recording of the cassette tape, set the Mechanism assembly to the required
mode before placing it upside down. If the mechanism
mode is changed (including ejection) while it is in an upside down position the tape inside may be damaged.
• For some models, the mechanism and board assemblies
are attached by connectors only. When carrying out a diagnosis or repair of the boards in the “Service position”,
make sure that the connectors are not disconnected.
To Rear S Jack
board assembly
Jig RCU mode
1.5.1
Setting the Jig RCU mode
(1) Unplug the power cord plug from the power outlet.
(2) Press and hold the “REC” and “PAUSE” buttons on the VCR
simultaneously, while plugging the power cord plug into the
power outlet.
When the VCR is set to the Jig RCU mode, the symbols
( “ : ” ) in the time display of the FDP are turned off.
1.5.2 Setting the User RCU mode
(1) Turn off the power.
(2) Press the “REC” and “PAUSE” buttons of the VCR simultaneously. Alternatively, transmit the code “80” from the Jig
RCU.
1.6 Mechanism service mode
This model has a unique function to enter the mechanism into
every operation mode without loading of any cassette tape. This
function is called the “Mechanism service mode”.
1.6.1 How to set the “Mechanism service mode”
(1) Set the VCR to the Jig RCU mode (the mode in which codes
from the Jig RCU can be received).
(2) Transmit the code “E5” from the Jig RCU.
(3) Release the lug of the Cassette holder and then slide the
Cassette holder toward the direction where the Cassette
holder is loaded by manually.
(4) The cassette holder lowers and, when the loading has completed, the mechanism enters the desired mode.
When the VCR is set to the Mechanism service mode, the
symbols (“Timer”) in the FDP (LED) are blinked.
1.6.2 How to exit from the "Mechanism service mode"
(1) Unplug the power cord plug from the power outlet.
VR2251
REC FM ADJ.
Main board
assembly
CN7103
CP3001
TP4001
CTL.P
CP4001
TP106
PB.FM
To Front S Jack
board assembly
CN7001
TP2254
TP2253 TP111
A.REC.FM A.PB.FM D.FF
To Adv. Jog/SW board assembly
Fig. 1-4-1a
1-9
1.7 Maintenance and inspection
1.7.3 Suggested servicing schedule for main components
1.7.1 Cleaning
The following table indicates the suggested period for such
service measures as cleaning, lubrication and replacement. In
practice, the indicated periods will vary widely according to environmental and usage conditions. However, the indicated components should be inspected when a set is brought for service
and the maintenance work performed if necessary. Also note
that rubber parts may deform in time, even if the set is not used.
Regular cleaning of the transport system parts is desirable but
practically impossible. So make it a rule to carry out cleaning
of the tape transport system whenever the machine is serviced.
When the video head, tape guide and/or brush get soiled, the
playback picture may appear inferior or at worst disappear, resulting in possible tape damage.
Operation hours
System
Note:
• Absolutely avoid sweeping the upper drum vertically as
this will cause damage to the video head.
(1) When cleaning the upper drum (especially the video head),
soak a piece of closely woven cloth with alcohol and while
holding the cloth onto the upper drum by the fingers, turn
the upper drum counterclockwise.
(2) To clean the parts of the tape transport system other than
the upper drum, use a piece of closely woven cloth or a
cotton swab soaked with alcohol.
(3) After cleaning, make sure that the cleaned parts are completely dry before using the cassette tape.
Parts name
1000H
2000H
Drum assembly
C,X
X
A/C head
C,X
C,X
C
C
C
C
Tension arm assembly
C
C
Capstan motor (Shaft)
C
C
Guide arm assembly
C
C
Pinch roller arm assembly
Tape transport Full erase head
Capstan motor
X
Capstan brake assembly
X
Main brake assembly
X
Belt (Capstan)
Drive
A/C head
Video heads
Fig. 1-7-1a
1.7.2 Lubrication
With no need for periodical lubrication, you have only to lubricate new parts after replacement. If any oil or grease on contact parts is soiled, wipe it off and newly lubricate the parts.
Note:
• See the “mechanism assembly” diagram of the “parts list”
for the lubricating or greasing spots, and for the types of
oil or grease to be used.
1-10
Other
X
X
Loading motor
X
Clutch unit
X
Worm gear
X
Control plate
X
Rotary encoder
X
C : Cleaning
X : Inspection or Replacement if necessary
SECTION 2
MECHANISM
2.1 Before disassembling
2.1.3 Setting the mechanism assembling mode
2.1.1 Notes
The mechanism-assembling mode is provided with this mechanism. When disassembling and assembling, it is required to
engage this mode.
Set the mode by adopting the following procedures.
(1) Remove the mechanism assembly using the disassembling
procedure.
(2) Turn gear (a) of the loading motor manually to set the mechanism assembly to the eject end mode. Make sure that the
main deck is connected to the guide hole (a) of the drive
lever and the seal (a) of the main deck is connected to the
mark “E” of the control plate. This condition is called the
mechanism-assembling mode.
This model’s mechanism relates closely to the rotary encoder
and system control circuit (the rotary encoder is meshed with
the control cam).
The system control circuit detects the mechanism condition
using the rotary encoder’s phase (internal switch phase).
Therefore, the parts such as the rotary encoder, control plate,
loading gear and control cam need to be installed correctly in
order for the mechanism to operate properly. (For the mechanism phase adjustment, refer to the installation of each part.)
• For the disassembly procedure of the major parts of the main
unit and notes, refer to the “section 1 disassembly”.
• Before using a soldering iron, be sure to disconnect the
power plug from the AC outlet.
• Do not touch any of the adjustment points until a defect position is specified.
• When plugging or unplugging the connector, be sure not to
damage the wire.
• Be sure the springs are hooked all the way around and in
the correct direction.
• When performing repairs, take care not to damage a catch,
etc.
Seal (a)
Guide hole (a)
“E” mark
CONTROL PLATE
DRIVE LEVER
<Example>
OK
(
NG
not hooked all the
way around
)
Fig. 2-1-1a
2.1.2 Mechanism operation check
When the mechanism is operated without a cassette loaded,
operate the mechanism in the mechanism service mode. (Refer to the "section 1 disassembly".)
LOADING MOTOR
Gear (a)
Unloading
Loading
Fig. 2-1-3a
2-1
2.1.4 Layout of the main mechanism parts
T2 Pole base assy
(take-up Side)
T3 A/C head
T4 Main brake assy
(take-up side)
Full erase head T17
Pole base assy T1
(supply side)
T5
Pinch roller arm assy
T6
Lid guide
T7 Guide arm assy
T8 Brake lever
Tension arm assy T16
T9 Drive lever
Tension arm base T15
Rec safety lever T14
Reel disk T13
(supply side)
T12
B15 Direct gear
Idler arm
T10 Reel disk
(take-up side)
T11 Ider gear 1/2
Fig. 2-1-4a
Load gear assy
(take-up side) B1
B2 Fixing plate
B3 Load gear assy
(supply side)
Capstan motor B14
B4 Load gear
B5 Control plate
Capstan brake B13
Press lever B12
B6 Tension arm lever
Control cam B11
Belt B10
Loading motor assy B9
B8 Clutch unit assy
B7 Change lever
Fig. 2-1-4b
Side frame(L) L2
R1 Side frame(R)
Earth spring(1) L1
Fig. 2-1-4c
2-2
Fig. 2-1-4d
2.1.5 Disassembling procedure table
T
2
2.1 Cassette holder
T
3
1
2
T
3
1
2
2.1 Drive arm
T
5
1
2
R1 2.1 Side frame (R)
T
3
1
2
T
1
1
2
L2 2.1 Side frame (L)
-
T3 2.2 A/C head
T17
- FE head
T
1
T6 2.3 Lid guide
T
1
T5 2.3 Pinch roller arm assy T
2
T12 2.4 Idler arm
T
4
T11 2.4 Idler gear 1/2
T
5
1
2
3
4
6
1
2
3
4
5
T10 2.5 Reel disk (T)
T
7
1
2
3
4
5
T16 2.5 Tension arm
T
6
1
2
3
4
5
T13 2.5 Reel disk (S)
T
7
1
2
3
4
5
6
T15 2.5 Tension arm base
T
7
1
2
3
4
5
6
T
8
1
2
3
4
5
6
7
6
7
-
- T-up lever
T8 2.5 Brake lever
T
8
1
2
3
4
5
T
8
1
2
3
4
5
1
2
3
T14 2.5 Rec safety lever
T
7
B12 2.6 Press lever
B
1
B11 2.6 Control cam
4
5
6
2
1
1
2
B9 2.6 Loading motor assy B
4
1
2
B10 2.7 Belt
1
B
T/B 2
B
1
B
2
1
B3 2.7 Loading gear assy(S) B
3
1
2
B1 2.7 Loading gear assy(T) B
4
1
2
3
T1
- Pole base assy(S)
T/B 4
1
2
3
T2
- Pole base assy(T)
T/B 5
1
2
3
4
1
2
3
4
4
5
B5 2.7 Control plate
T9
- Drive lever
Direct gear
1
T/B 1
B4 2.7 Load gear
- Load gear base
Clutch unit
3
B2 2.7 Fixing plate
-
Control plate
Loading gear assy (T)
Loading gear assy (S)
Load gear
Fixing plate
6
3
- Wire holder
Belt
7
B
-
Loading motor assy
6
B13 2.6 Capstan brake assy B
B14 2.7 Capstan motor
Capstan brake assy
1
3
T4 2.5 Main brake assy (T) T
- T-up head
Control cam
1
T/B 1
T7 2.3 Guide arm assy
-
Press lever
Tension arm base
Tension arm
Reel disk (T)
4
2.1 Top frame
-
Main brake (T)
Side frame (R)
3
-
Idler gear 1/2
R1 T6 T12 T11 T4 T10 T16 T15 B12 B11 B13 B9 B10 B2 B4 B3 B1 B5 B8 B15
Idler arm
-
Lid guide
L2
Drive arm
1
-
Side frame (L)
T
-
Cassette holder
L1 2.1 Earth spring (1)
L1
Top frame
(Reference items)
Replacement parts
Number of removal steps
Symbols and numbers
Removal parts
Front(T)/Back(B) of mechanism
Symbols and numbers
Earth spring (1)
This table shows the order of parts removal when replacing each part. For replacement, remove the parts in the order of 1 to 13
shown in the table and install the parts in the reverse order.
The symbol number before each part name shows the number in the figure “Layout of the main mechanism parts”. T and B on the
right of each part name show the side from which the part should be removed (T: From the front of the mechanism, B: From the
rear of the mechanism, T/B: From both sides).
B
5
B
6
T/B 10 1
B8 2.8 Clutch unit
B
2
B15 2.8 Direct gear
B
3
B7
- Change lever
T/B 6
B6
- Tension arm lever
T/B 14 1
2
3
4
5
6
1
2
7
8
3
9
1
1
2
3
1
2
4
5
2
3
6
7
8
9
10 11 12
4
5
13
2-3
2.2 Replacement of the main mechanism parts
2.2.1.3 Disassembling
2.2.1 Cassette holder
(1) Release hook (a) to remove the earth spring (1) from the
top frame.
(2) Release the catches (a) and (b) and pull the top frame in
the direction shown by the arrow (a) to remove it.
(3) Pull out the side frame (R).
(4) Pull out the cassette holder assembly and drive arm assembly from the side frame (L).
2.2.1.1 Removal
(1) Remove the screws (a) and (b).
(2) Hold up the top frame, cassette holder assembly, drive arm
assembly and side frames (L/R) all together and remove
them by releasing the hooks (a) and (b).
Screw (a)
Hook (a)
Catch (a)
Catch (b)
Screw (b)
Hook (a)
EARTH SPRING(1)
Arrow (a)
Hook (b)
TOP FRAME
SIDE
FRAME(L)
Fig. 2-2-1a
CASSETTE HOLDER
Assembly
2.2.1.2 Installation (phase adjustment)
(1) Turn gear (a) of the loading motor assembly so that the main
deck connects to the guide hole (a) of the drive lever.
(2) Hook the main deck to hooks (a) and (b).
(3) Place the projection of the drive lever to section (a) of the
side frame (R) and install the cassette holder to the main
deck. Make sure that the bosses of the side frame (L/R) connect with the holes (a) and (b) of the main deck.
(4) Secure screws (a) and (b).
Screw (a)
Screw (b)
Hook (a)
Section
(a)
Hook (b)
Hole (b)
Guide hole (a)
Hole
(a)
DRIVE
LEVER
Gear (a)
Fig. 2-2-1b
2-4
SIDE FRAME(R)
DRIVE ARM Assembly
Fig. 2-2-1c
2.2.1.4 Assembling (installation and phase adjustment)
(1) Turn gear (a) of the loading motor assembly so that the main
deck connects to the guide hole (a) of the drive lever.
(2) Place the projection of the drive lever on section (a) of the
side frame (R) and install the side frame (R) to the main deck.
(3) Secure screw (b).
(4) Place section (b) of the drive arm on the gear of the side
frame (R). Make sure that the pin of the door opener connects with section (c) of the drive arm.
(5) Place the drive arm on section (d) of the side frame (L) and
install the side frame (L) on the main deck. Be sure to connect the earth spring (1) to the side frame (L).
(6) Secure screw (a).
(7) Turn gear (a) of the loading motor assembly until the drive
arm is vertical.
(8) Place the slit of the side frame (L/R) at the foot of the cassette holder assembly and install the cassette holder.
(9) Place the top frame on the position guide (a) of the side
frame (L/R) and push it in the direction shown by the arrow
(a) for installation.
(10) Hook the earth spring (1) to the hook (a) of the top frame.
2.2.2 A/C head
Screw (b)
2.2.2.1 Removal
SIDE FRAME(R)
(1) Remove screws (a) and (b).
(2) Remove the A/C head together with the head base.
(3) Remove the screws (c), (d) and (e) to remove the spring (a)
and the A/C head from the head base.
Section (a)
Screw (e)
Screw (c)
Screw (d)
DRIVE LEVER
Spring (a)
A/C HEAD
Screw (a)
Screw (b)
HEAD BASE
Cassette Holder Assembly
Screw (a)
Fig. 2-2-2a
Guide hole (a)
Gear (a)
Section (c)
2.2.2.2 Installation (initial setting)
Section
(b)
To install the A/C head to the head base, secure the screws in
the order of (c), (d) and (e). To make the adjustment easy, temporarily elevate the A/C head.
DRIVE ARM(R)
SIDE FRAME(R)
SIDE FRAME(L)
DRIVE ARM(L)
Section (d)
Hook (a)
A/C HEAD
(Temporary height)
11mm
Position guide (a)
HEAD BASE
Fig. 2-2-2b
EARTH SPRING(1)
TOP FRAME
Arrow (a)
Fig. 2-2-1d
2-5
2.2.3 Guide arm, pinch roller arm
2.2.4 Idler arm, idler gear 1/2
2.2.3.1 Removal
2.2.4.1 Removal
(1) Remove the spring (a) from the hook (a) and detach the
guide arm assembly.
(2) Release the catch (a) to remove the lid guide.
(3) Remove the spring (b) from the hook (b) and detach the
pinch roller arm assembly.
(1) Release the catches (a) and (b) to detach the idler arm.
(2) Detach the idler gear 1/2.
Pinch roller arm assembly
IDLER ARM
Catch (b)
Catch (a)
Spring (b)
PRESS
LEVER
Hook (b)
LID GUIDE
Catch
(a)
IDLER GEAR 1/2
IDLER ARM
IDLER GEAR 2
Guide arm assembly Hook (a)
Spring (a)
IDLER GEAR 1
LID GUIDE
Pinch roller arm
assembly
Fig. 2-2-4a
Guide arm assembly
2.2.5 Main brake (T), brake lever, tension arm,
reel disk (S/T), Rec safety lever
2.2.5.1 Removal
PRESS
LEVER
Fig. 2-2-3a
2-6
(1) Remove the spring (a). (Detach section (b) of the spring (a).)
(2) Release the catch (a) to detach the main brake (T).
(3) Release the catch (b) to detach the reel disk (T) and the
spacer.
(4) Lift up and turn section (b) of the brake lever counterclockwise
to remove the brake lever.
(5) Remove the spring (b) from the hook (a).
(6) Release the catch (c) to detach the tension arm.
(7) Release the catch (d) to detach the reel disk (S) and the
spacer.
(8) Remove the spring (c) from the hook (b).
(9) Turn the tension arm base in the direction shown by arrow
(a) to release catch (e). Place the projections of the tension
arm base to the holes (a) to detach the tension arm base.
(10) While releasing the catch (f), turn the Rec safety lever
counterclockwise to remove it.
Spring (b)Tension arm assembly
Catch (d)
Catch (c)
Hook (a)
2.2.6 Press lever, control cam, capstan brake assembly,
loading motor assembly
Main brake (T) assembly
Section (b) Spring (a)
BRAKE
Spring (a)
LEVER
2.2.6.1 Removal
(1) Remove the slit washer (a) to detach the press lever.
(2) Release the slit washer (b) to detach the control cam.
(3) Release the catch (b) to detach the capstan brake assembly.
(4) Remove the solder (a).
(5) Remove the screw (a).
(6) Release the catches (c) and (d) to detach the loading motor
assembly.
REEL DISK(S)
Catch (a)
Catch (b)
REEL DISK(T)
Catch (d)
Catch (c)
Tension arm
assembly
Main brake (T)
assembly
Tension arm base
assembly
Loading motor
assembly
REEL DISK(T)
Screw (a)
REEL DISK(S)
SPACER
REC SAFETY
LEVER
BRAKE
LEVER
Tension arm base assembly
Arrow (a)
Hole (a)
Hole (a)
Capstan
brake assembly
Loading
motor
assembly
Screw (a)
Hook (b)
Catch (e)
CONTROL
CAM
PRESS LEVER
Slit washer
(b)
Capstan brake assembly Catch (b)
Spring (c)
Slit washer (a)
REC
SAFETY
LEVER
Solder (a)
Catch (f)
Fig. 2-2-5a
CONTROL CAM
Slit washer (b)
Fig. 2-2-6a
2-7
2.2.6.2 Installation (phase adjustment)
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
Attach the loading motor assembly to the main deck.
Secure the screw (a).
Solder the wire to section (a).
Arrange the wire along with the position guide (b).
Attach the capstan brake assembly to the main deck.
Place the main deck on the guide hole (a) of the control plate.
Place the main deck on the guide hole (b) of the drive lever.
Place the main deck no guide hole (c) of the control cam to
install the control cam.
(9) Move the capstan brake in the direction shown by the arrow
(a) to attach the press lever to the shaft (a). Make sure that
the boss of the press lever fits in the control cam, and that
the shaft (b) of the pinch roller arm assembly connects with
the hole of the press lever.
(10) Attach slit washer (a) to shaft (a).
Wire (red)
Note:
• When replacing the worm bearing of the loading motor assembly, attach it according to the following specification.
If worm bearing is not attached correctly, a mechanism
noise may occur. (See Fig. 2-2-6c)
LOADING MOTOR
WORM BEARING
6.8 ± 0.2 mm
Fig. 2-2-6c
2.2.7 Capstan motor, load gear, control plate
2.2.7.1 Removal
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
Wire (black)
Section (a)
Detach the belt.
Check that the FFC connector on the drum is disconnected.
Release the catch (a) to remove the FFC wire.
Remove the screws (a) to detach the capstan motor.
Remove the screws (b) to detach the fixing plate.
Release the catch (b) to detach the load gear.
Turn the load gear (S/T) in the loading direction to detach it.
Remove the control plate.
Screws (a)
Capstan brake assembly
Position
guide (b)
Shaft (a)
Arrow (a)
CONTROL
PLATE
Guide hole (a)
DRIVE
LEVER
Guide hole (b)
Load gear (T) assembly
Load gear (S) assembly
LOAD GEAR
Screw (a) Guide hole (c)
CONTROL CAM
Loading motor assembly
CONTROL
PLATE
FIXING PLATE
Capstan motor assembly
Shaft (a)
Screws (b)
Shaft (b)
BELT
Catch (b)
PRESS LEVER
Slit washer (a)
LOAD GEAR
Catch (a)
Fig. 2-2-6b
2-8
Fig. 2-2-7a
FFC
2.2.7.2 Installation (phase adjustment)
2.2.8 Clutch unit assembly, direct gear
(1) Place the main deck on the guide hole (a) of the tension arm
lever.
(2) Place the main deck on the guide hole (b) of the brake lever.
(3) Attach the control plate to align with the position guide (a).
(4) Place the hole (c) of the load arm (T) on the pole base (T)
and the load gear (T) on the load gear base.
(5) Place the hole (d) of the load arm (S) on the pole base (S)
and the load gear (S) on the load gear base. Be sure to align
the guide mark (e) of the load gear (T) to that of the load
gear (S).
(6) Turn the load gear (S/T) in the unloading direction to place
the main deck on the guide hole (f) of the load gear (T).
(7) Place the main deck on the guide hole (g) of the control plate.
(8) Attach the load gear on the load gear base so that the control plate is placed on the edge (h) of the load gear.
(9) Place the fixing plate on the shaft of the load gear base and
secure the screws (b).
2.2.8.1 Removal
(1) Remove the slit washer (a) to detach the clutch unit assembly.
(2) Remove the spring (a) and the direct gear.
DIRECT GEAR
POLE
BASE(T)
Guide marks (e)
Hole (c)
POLE
BASE(S)
Spring (a)
Hole (d)
CLUTCH UNIT
Slit washer (a)
Fig. 2-2-8a
LOAD GEAR BASE
Load gear (S) assembly
Load gear (T) assembly
Load gear (T)
assembly
Edge (h)
CONTROL PLATE
Insertion direction
Position guide (a)
Guide hole (g)
Guide hole (f)
Load gear (S)
assembly
Screws (b)
FIXING
PLATE
LOAD GEAR
(From the top)
Guide hole (b) BRAKE LEVER
Guide hole (a)
TENSION ARM LEVER
Fig. 2-2-7b
2-9
2.3 Mechanism timing chart
MECHANISM MODE
FOR
PLAY SLOW
/STILL
EJECT
CONTROL PLATE
MARK
E
P
SL
REV
SERCH
/SLOW
/STILL
REEL
STOP BRAKE FF
/REW
R
ST
B FR
ON
POLE BASE
OFF
LOCK
REEL LOCK
FREE
ON
TENSION ARM
OFF
TENSION
ARM LEVER
PLAY
STOP
FF/REW
REV
OFF
ON(STOP MODE PRESS UP)
ON
BRAKE
LEVER
OFF
ON
GUIDE ARM
PINCH
ROLLER
OFF
ON
CONTACT
OFF
ON
CAPSTAN BRAKE
OFF
TU LEVER
DIRECT GEAR
OFF2
OFF1
ON
OFF
DIRECT
CLUTCH
Movements of a
CONTROL PLATE (m/m)
2-10
0
5
10
15
20
25
30
35
40
45
50
55
SECTION 3
ADJUSTMENT
3.1.4 Color (colour) bar signal, color (colour) bar pattern
3.1 Before adjustment
3.1.1 Precaution
• Color(colour) bar signal [NTSC] • Color(colour) bar pattern [NTSC]
Red
Blue
Green
Magenta
Burst
Cyan
Yellow
White
100 IRE
(75%)
Cyan
Green
Magenta
Red
Blue
White(75%)
1V
40 IRE
40 IRE
Q
Q
I
White
100%
I
Black
Horizontal sync
3.1.5
Switch settings
When adjusting this unit, set the VCR mode and switches
as described below.
3.1.2 Required test equipments
•
•
•
•
•
•
White(100%)
Yellow
• The adjustments of this unit include the mechanism
compatibility and electrical adjustments. During the
performance of this work, be sure to observe the precautions for each type of adjustment.
• If there is a reference to a signal input method in the
signal column of the adjustment chart, “Ext. S-input”
means the Y/C separated video signal and “Ext. input”
means the composite video signal input.
• Unless otherwise specified, all measuring points and
adjustment parts are located on the Main board.
Color (colour) television or monitor
Oscilloscope: wide-band, dual-trace, triggered delayed sweep
Signal generator: RF / IF sweep / marker
Signal generator: stairstep, color (colour) bar [NTSC]
Recording tape
Digit-key remote controller(provided)
• When using the Jig RCU, it is required to set the VCR to
the Jig RCU mode (the mode in which codes from the Jig
RCU can be received). (See "section 1 disassembly".)
Jig RCU
[Data transmitting method]
Depress the “ ” ( 3 ) button
after the data code is set.
INITIAL MODE
3.1.3 Required adjustment tools
CUSTOM CODE
43: A CODE
: Used
Mechanism
compatibility
adjustment
: Not used
Roller driver
Jig RCU
Back tension cassette gauge
Alignment tape(MHP)
Alignment tape(MHP-L)
Roller driver
PTU94002
Alignment tape
(SP, stairstep, NTSC)
MHP
Jig RCU
PTU94023B
Alignment tape
(EP, stairstep, NTSC)
MHP-L
DATA CODE
Electrical
adjustment
Back tension cassette gauge
PUJ48076-2
Fig. 3-1-5a
Jig RCU [PTU94023B]
• Set the switches as shown below unless otherwise specified on the relevant adjustment chart. The switches that are
not listed below can be set as desired.
If the VCR is not equipped with the functions detailed below, setup is not required.
AUTO PICTURE/VIDEO CALIBRATION/
B.E.S.T./D.S.P.C.
OFF
PICTURE CONTROL/SMART PICTURE
NORMAL/NATURAL
VIDEO STABILIZER
OFF
TBC
ON
Digital 3R
ON
VIDEO NAVIGATION/TAPE MANAGER
OFF
BLUE BACK
OFF
3-1
3.1.6 Manual tracking mode (Auto tracking ON/OFF) setting
(1) In order to set to the manual tracking mode during tape
playback, press the “SP/EP(LP)” button on the remote
control unit.
• Each press of the button switches the auto tracking ON
or OFF.
• When the auto tracking is OFF, the monitor screen displays “AT: OFF”.
• When the manual tracking mode is set, the tracking is
placed at the center position.
(2) Press “channel +/-” to adjust the tracking manually.
3.1.7 EVR adjustment
Notes:
• Although compatibility adjustment is very important, it is not
necessary to perform this as part of the normal servicing
work. It will be required when you have replaced the A/C head,
drum assembly or any part of the tape transport system.
• To prevent damaging the alignment tape in the compatibility
adjustment, prepare a cassette tape (for self-recording/playback), perform a test on it by transporting it and making sure
that the tape is not bent by the tape transport mechanisms
such as in the guide rollers.(See Fig.3-2-2a.)
3.2.1 Tension pole position
Notes:
• This adjustment must be performed every time the tension
band is replaced.
Signal
(A)
• Back tension cassette gauge
Mode
(B1)
(B2)
• PB
• Eject end
• Adjust pin [Mechansim assembly]
• 25 - 51 gf•cm (2.45 – 5 × 10-3 Nm)
[PUJ48076-2]
Some of the adjustments require the adjustment performed
by the EVR system. The main unit have EEPROMs for storing the EVR adjustment data and user setups.
Notes:
• In the EVR adjustment mode, the value is varied with
the channel buttons (+, –). The adjusted data is stored
when the setting mode changes (from PB to STOP,
when the tape speed is changed, etc.). Take care to
identify the current mode of each adjustment item
when making an adjustment.
• When changing the address setting in the EVR adjustment mode, use the Jig RCU or the remote controller
having numeric keypad with which a numeric code can
be directly input.
The remote control code of the Jig RCU corresponds
to each of the digit keys on the remote controller as
follows.
Digit-key 0 1
Code
20 21
3.2 Mechanism compatibility adjustment
2 3
22 23
4
24
5
25
6
26
7 8 9
27 28 29
• As the counter indication and remaining tape indication are not displayed FDP during the EVR adjustment
mode, check them on the TV monitor screen.
• When performing the EVR adjustment, confirm that the
FDP indication is changed to the EVR mode, as shown
below.
Adjustment part
(F)
Specified value
(G)
(1) Play back the back tension cassette gauge (A).
(2) Check that the indicated value on the left side gauge is
within the specified value (G).
(3) If the indicated value is not within the specified value (G),
perform the adjustment in a following procedure.(See
Fig.3-2-1a.)
1) Remove the top frame, cassette holder and side
frames (L/R) all together. (See “section 2 mechanism”.)
2) Rotate the loading motor gear to move the control plate
so that the triangular stamping to the left of the “P”
stamping is aligned with the stamping (a) on the main
deck. This positioning is mode (B1).
3) Adjust by turning the adjustment pin so that the tip of
the tension arm is aligned with the stamping (b) on
the main deck.
4) Rotate the reel disk (S) by about one turn clockwise
and make sure that the round hole of the adjustment
pin is located in the “OK” range.
If it is outside this range, restart the adjustment from
the beginning.
After completion of the adjustment, rotate the loading gear
motor to return it to the mode (B2) position.
FDP
TENSION ARM
CONTROL PLATE
Stamping(a)
Stamping(b)
Fig. 3-1-7a
EVR mode
OK
NG
ADJUST PIN
Fig. 3-2-1a
3-2
3.2.2 FM waveform linearity
Signal
(A1)
(A2)
Mode
(B)
Equipment
(C)
Measuring point
(D)
External trigger
(E)
Adjustment part
(F)
Specified value
(G)
Adjustment tool
(H)
• Proper waveform variation
• Alignment tape(SP, stairstep, NTSC) [MHP]
• Alignment tape(EP, stairstep, NTSC) [MHP-L]
• PB
• Oscilloscope
• TP106 (PB. FM)
• TP111 (D.FF)
• Guide roller [Mechanism assembly]
• Flat V.PB FM waveform
• Roller driver [PTU94002]
(1) Play back the alignment tape (A1).
(2) Apply the external trigger signal to D.FF (E), to observe
the V.PB FM waveform at the measuring point (D).
(3) Set the VCR to the manual tracking mode.
(4) Make sure that there is no significant level drop of the V.PB
FM waveform caused by the tracking operation, with its
generally parallel and linear variation ensured. Perform the
following adjustments when required. (See Fig. 3-2-2b.)
(5) Reduce the V.PB FM waveform by the tracking operation. If a drop in level is found on the left side, turn the
guide roller of the pole base assembly (supply side) with
the roller driver to make the V.PB FM waveform linear.
If a drop in level is on the right side, likewise turn the guide
roller of the pole base assembly (take-up side) with the
roller driver to make it linear. (See Fig. 3-2-2b.)
(6) Make sure that the V.PB FM waveform varies in parallel
and linearly with the tracking operation again. When required, perform fine-adjustment of the guide roller of the
pole base assembly (supply or take-up side).
(7) Unload the cassette tape once, play back the alignment
tape (A1) again and confirm the V.PB FM waveform.
(8) After adjustment, confirm that the tape wrinkling does not
occur at the roller upper or lower limits. (See Fig. 3-2-2a.)
[Perform adjustment step (9) only for the models
equipped with SP mode and EP (or LP) mode.]
(9) Repeat steps (1) to (8) by using the alignment tape (A2).
Improper
(a) GUIDE ROLLER
(b) GUIDE POLE
Fig. 3-2-2a
Proper
• Improper waveform variation
Up
Down
B
A
Roller driver
D
C
Guide roller
(supply side)
Fig. 3-2-2b
3.2.3 Height and tilt of the A/C head
Note:
• Set a temporary level of the height of the A/C head in
advance to make the adjustment easier after the A/C
head has been replaced. (See “section 2 mechanism”.)
Signal
(A)
Mode
(B)
Equipment
(C)
Measuring point
(D1)
(D2)
External trigger
(E)
Adjustment part
(F)
Specified value
(G)
• Alignment tape(SP, stairstep, NTSC) [MHP]
• PB
• Oscilloscope
• AUDIO OUT terminal
• TP4001 (CTL. P)
• TP111 (D.FF)
• A/C head [Mechanism assembly]
• Maximum waveform
(1) Play back the alignment tape (A).
(2) Apply the external trigger signal to D.FF (E), to observe
the AUDIO OUT waveform and Control pulse waveform
at the measuring points (D1) and (D2) in the ALT mode.
(3) Set the VCR to the manual tracking mode.
(4) Adjust the AUDIO OUT waveform and Control pulse
waveform by turning the screws (1), (2) and (3) little by
little until both waveforms reach maximum. The screw (1)
and (3) are for adjustment of tilt and the screw (2) for azimuth.
Head base
(2)
(1)
AUDIO OUT
CTL. P
A/C head
(3)
Fig. 3-2-3a
3-3
3.3
3.2.4 A/C head phase (X-value)
Signal
(A1)
(A2)
Mode
(B)
Equipment
(C)
Measuring point
(D)
External trigger
(E)
Adjustment part
(F)
Specified value
(G)
Adjustment tool
(H)
• Alignment tape(SP, stairstep, NTSC) [MHP]
• Alignment tape(EP, stairstep, NTSC) [MHP-L]
• PB
• Oscilloscope
• TP106 (PB. FM)
• TP111 (D.FF)
• A/C head base [Mechanism assembly]
• Maximum V.PB FM waveform
• Roller driver [PTU94002]
(1) Play back the alignment tape (A1).
(2) Apply the external trigger signal to D.FF (E), to observe
the V.PB FM waveform at the measuring point (D).
(3) Set the VCR to the manual tracking mode.
(4) Loosen the screws (4) and (5), then set the Roller driver
to the innermost projected part of the A/C head. (See Fig.
3-2-4a.)
(5) Rotate the roller driver so that the A/C head comes closest to the capstan. From there, move the A/C head back
gradually toward the drum until the point where the FM
waveform is maximized for the second time, and then
tighten the screws (4) and (5) temporarily.
(6) Play an alignment tape (A2) and set to the manual-tracking mode.
(7) Fine-adjust A/C head base position to maximize the FM
waveform, and then tighten the screws (4) and (5) firmly.
(8) Play alignment tapes (A1) and (A2) and confirm that the
FM waveforms are maximized when the tracking is at the
center position.
To the drum
Roller driver
Toward the capstan
Screw (4)
Head base
Toward the drum
Electrical adjustment
Note:
The following adjustment procedures are not only necessary
after replacement of consumable mechanical parts or board
assemblies, but are also provided as references to be referred to when servicing the electrical circuitry.
In case of trouble with the electrical circuitry, always begin a
service by identifying the defective points by using the measuring instruments as described in the following electrical adjustment procedures. After this, proceed to the repair, replacement and/or adjustment. If the required measuring instruments are not available in the field, do not change the
adjustment parts (variable resistor, etc.) carelessly.
3.3.1
3.3.1.1
Servo circuit
Switching point
Signal
(A1)
(A2)
• Stairstep signal
• Alignment tape (EP,stairstep,NTSC) [MHP-L]
Mode
(B)
• PB
Equipment
(C)
• Oscilloscope
Measuring point
(D1)
(D2)
• VIDEO OUT terminal (75Ø terminated)
• TP106 (PB. FM)
External trigger
(E)
• TP111 (D.FF)
Adjustment part
(F)
• Jig RCU: Code “5A”
Specified value
(G)
• 7.5 ± 0.5H
Adjustment tool
(H)
• Jig RCU [PTU94023B]
(1) Play back the signal (A1) of the alignment tape (A2).
(2) Apply the external trigger signal to D.FF (E) to observe
the VIDEO OUT waveform and V.PB FM waveform at the
measuring points (D1) and (D2).
(3) Set the VCR to the manual tracking mode.
(4) Adjust tracking so that the V.PB FM waveform becomes
maximum.
(5) Set the VCR to the Auto adjust mode by transmitting the
code (F) from the Jig RCU. When the VCR enters the
stop mode, the adjustment is completed.
(6) If the VCR enters the eject mode, repeat steps (1) to (5)
again.
(7) Play back the alignment tape (A2) again, confirm that the
switching point is the specified value (G).
A/C head
Screw (5)
To the capstan
V.sync
Trigger point
Switching point
Waveform output
Fig. 3-2-4a
Alignment tape
[SP, stairstep]
played with the
SP head
Alignment tape
[EP(LP), stairstep]
played with the
EP(LP) head
V. rate
Fig. 3-3-1-1a
3.3.1.2 Slow tracking preset
X-value adjustment point
Drum side
Control head position
Fig. 3-2-4b
Signal
(A1)
(A2)
• Ext. input
• Color (colour) bar signal [NTSC]
Mode
(B1)
(B2)
• S-VHS SP
• S-VHS EP
Capstan side
Maximum
3-4
Switching point
Measuring point
(D)
• TV-Monitor
Adjustment part
(F)
• Jig RCU: Code “71“ or “72”
Specified value
(G)
• minimum noise
Adjustment tool
(H)
• Jig RCU [PTU94023B]
(1) Record the signal (A2) in the mode (B1), and play back
the recorded signal.
(2) Set the VCR to the manual tracking mode.
(3) Set the VCR to the FWD slow (+1/6x) mode.
(4) Transmit the code (F) from the Jig RCU to adjust so that
the noise bar becomes the specified value (G) on the TV
monitor in the slow mode.
(5) Set the VCR to the Stop mode.
(6) Confirm that the noise bar is (G) on the TV monitor in
the slow mode.
(7) Repeat steps (3) to (6) in the REV slow (–1/6x) mode.
(8) Repeat steps (1) to (7) in the mode (B2).
Note:
• For FWD slow (+1/6x) playback, transmit the code “08”
from the Jig RCU to enter the slow playback mode, and
transmit the code “D0” for REV slow (–1/6x) mode.
3.3.3 Audio circuit
Notes:
• GND (Ground) should be taken from the Tuner shield
case.
3.3.3.1 Audio REC FM
Signal
(A1)
(A2)
(A3)
Mode
(B)
Equipment
(C)
Measuring point
(D)
External trigger
(E)
Adjustment part
(F)
Specified value
(G1)
(G2)
3.3.2 Video circuit
3.3.2.1 EE Y/PB Y (S-VHS/VHS) level
Signal
(A1)
(A2)
Mode
(B1)
(B2)
(B3)
Equipment
(C)
Measuring point
(D)
EVR mode
EVR address
(F1)
(F2)
(F3)
(F4)
Specified value
(G)
Adjustment tool
(H)
• Ext. input
• Color (colour) bar signal [NTSC]
• EE
• S-VHS SP
• VHS SP
• Oscilloscope
• Y OUT terminal (75Ø terminated)
• Jig code “57”
• A : 11
• Jig code “21” twice
• Jig code “18” or “19” (Channel +/-)
• 1.00 ± 0.05 Vp-p
• Jig RCU [PTU94023B]
(1) Set the VCR to the mode (B1)
(2) Observe the Y OUT waveform at the measuring point (D).
(3) Set the VCR to the EVR mode by transmitting the code
(F1) from the Jig RCU.
(4) Set the EVR address to (F2) by transmitting the code (F3)
from the Jig RCU.
(5) Transmit the code (F4) from the Jig RCU to adjust so that
the Y level of the Y OUT waveform becomes the specified value (G).
(6) Release the EVR mode of the VCR by transmitting the
code (F1) from the Jig RCU again. (When the EVR mode
is released, the adjusted data is memorized.)
(7) Record the signal (A2) in the mode (B2), and play back
the recorded signal.
(8) Set the VCR to the manual tracking mode.
(9) Repeat steps (1) to (5) in the mode (B2).
(10)Record the signal (A2) in the mode (B3), and play back
the recorded signal.
(11)Set the VCR to the manual tracking mode.
(12)Repeat steps (1) to (5) in the mode (B3).
• Ext. input
• Audio: No signal
• Video: Color (colour) bar signal [NTSC]
• S-VHS EP
• Oscilloscope
• TP2253 (A. PB. FM)
• TP111 (D.FF)
• VR2251
• 350 ± 50 mVp-p
• More than 200 mVp-p
(1) Apply the external trigger signal to D.FF (E) to observe
the Audio PB FM waveform at the measuring point (D).
(2) Record the signal (A3) with no audio signal input in the
mode (B), and play back the recorded signal.
(3) Set the VCR to the manual tracking mode.
(4) If the A.PB FM level is not within the specified value (G1),
perform the adjustment in a following procedure.
(5) Adjust the adjustment part(F) to become waveform level
of specified value(G1) in a channel with higher A. PB FM
waveform. (Adjust before recording, then confirm it by
playing back.)
(6) If specified value(G1) is not obtained in step(5), adjust
the adjustment part(F) to become waveform level of
specified value(G2) in channel with lower A. PB FM
waveform.(Adjust before recording, then confirm it by
playing back.)
Specified
value (G1)
Specified
value (G2)
V. rate
Fig. 3-3-3-1a
Audio REC FM
Y level
H. rate
Fig. 3-3-2-1a
EE/PB Y level
3-5
JVC SERVICE & ENGINEERING COMPANY OF AMERICA
DIVISION OF JVC AMERICAS CORP.
Head office
East Coast
Midwest
West Coast
Atlanta
Hawaii
:
:
:
:
:
:
1700 Valley Road Wayne, New Jersey 07470-9976
10 New Maple Avenue Pine Brook, New Jersey 07058-9641
705 Enterprise Street Aurora, Illinois 60504-8149
5665 Corporate Avenue Cypress, California 90630-0024
1500 Lakes Parkway Lawrenceville, Georgia 30043-5857
2969 Mapunapuna Place Honolulu, Hawaii 96819-2040
(973)317-5000
(973)396-1000
(630)851-7855
(714)229-8011
(770)339-2582
(808)833-5828
JVC CANADA INC.
Head office : 21 Finchdene Square Scarborough, Ontario M1X 1A7
: 16800 Rte Trans-Canadienne, Kirkland, Quebec H9H 5G7
Montreal
Vancouver : 13040 Worster Court Richmond, B.C. V6V 2B3
(416)293-1311
(514)871-1311
(604)270-1311
S40895-04
Printed in Japan
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