LOADING MOTOR BOARD ASSEMBLY <55> ................. 5-17
GR BOARD ASSEMBLY <96> .......................................... 5-17
4-5
4-43
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.
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 com-
ply 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:
1) Wires covered with PVC tubing
2) Double insulated wires
3) High voltage leads
5. Use specified insulating materials for hazardous live parts. Note
especially:
1) Insulation Tape3) Spacers5) Barrier
2) PVC tubing4) Insulation sheets for transistors
6. When replacing AC primary side components (transformers, power
cords, noise blocking capacitors, etc.) wrap ends of wires securely
about the terminals before soldering.
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) 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).
cut close to connector
Fig.3
(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
Fig.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.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.
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.
Fig.4
(3) Align the lengths of the wires to be connected. Insert the
wires fully into the connector.
Metal sleeve
Connector
Fig.5
(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.
1
.2
5
2
.0
5
.5
Fig.6
(5) Check the four points noted in Fig.7.
Not easily pulled free
Wire insulation recessed
more than 4 mm
Fig.7
Crimping tool
Crimped at approx. center
of metal sleeve
Conductors extended
1
S40888-01
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.
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.
Externally
exposed
accessible part
Fig. 9
Z
V
ab
A
c
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.
Fig. 10
Table 1 Specifications for each region
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 DISASSEMBLY FLOW CHART
This flowchart lists the disassembling steps for the cabinet
parts and P.C. boards in order to gain access to item(s)
to be serviced. When reassembling, perform the step(s) in
reverse order. Bend, route and dress the flat cables as they
were originally laid.
Top cover
Bottom cover
Bracket
Front panel assembly
Drum assembly
Mechanism assembly
SW/Display board assembly
Main/GR board assemblies
1.2 HOW TO READ THE DISASSEMBLY AND ASSEMBLY
1.3 DISASSEMBLY/ASSEMBLY METHOD
STEP
/LOC
NO.
1
2
3
4
5
6
7
8
PART NAME
Top coverD14(S1)
Bottom coverD2(S2a), 2(S2b),<NOTE 2>
BracketD32(S3)
Front panel assembly D49(L4a),
Drum assemblyD53(S5), 4(L5a),
Mechanism assembly D62(S6a), 2(S6b),
SW/Display boardD7CN7001(WR7),
assembly(L7a),
Main board assembly D82(S8a), (S8b)
----------------------------------------------
GR board assembly(S8c), (L8)<NOTE4a>
FIG.
NO.
3(L2a), 4(L2b)
----------------
EARTH PLATE
CN901(WR4a),
CN902(WR4b),
CN3012(WR4c)
----------------
2(S4), 2(L4b),
JACK board assy
(L5b), (P5),
CON1(WR5a),
CN1(WR5b)
----------------
Inertia plate,
Roller arm assy
2(L6),
CN1(WR6)
REC safety
board assy,
4(L7b), 4(L7c)
POINT NOTE
<NOTE 4a>
<NOTE 4b>
<NOTE 4a>
<NOTE 4a>
<NOTE 6a>
<NOTE 6b>
<NOTE 4a>
<NOTE 7>
STEP
/LOC
NO.
1
2
3
(1)(2)(3)(4)(5)
PART NAME
Top coverD14(S1)
Bottom coverD2(S2a), 2(S2b),<NOTE 2>
BracketD32(S3)
FIG.
NO.
POINT NOTE
3(L2a), 4(L2b)
----------------
EARTH PLATE
(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,unpluged,unclamped or unsoldered.
P = Spring,
W = Washer, S = Screw, L = Locking tab,
CNxx(WRxx) = Remove the wire (WRxx) from the connector
(CNxx).
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.
(5) Adjustment information for installation
<NOTE2>
When attaching the Bottom cover, make sure that the earth plate of
•
the Bottom cover is passed through the hole of the Bottom chassis
and then touches the GND (Ground) on the Main board assembly.
<NOTE4a>
Be careful not to damage the connector and wire etc. during connec-
•
tion and disconnection.
When connecting the wire to the connector, be careful with the wire
direction.
<NOTE4b>
When reattaching the Front panel assembly, make sure that the door
•
opener a of the Cassette holder assembly is lowered in position prior
to the reinstallation.
<NOTE6a>
When it is required to remove the screws (S6a) retaining the Mecha-
•
nism assembly, please refer to the “Procedures for Lowering the Cassette holder assembly”(See on page 1-2).
When removing the Mechanism assembly only, unhook the two spacers
•
connecting it with the Main board assembly with pliers from the back
side of the Main board assembly first, and then remove the Mechanism assembly.
When reattaching the Mechanism assembly to the Main board as-
•
sembly, take care not to damage the sensors on the Main board assembly (D3001: LED, Q3002: Start sensor, Q3003: End sensor, S3002
: S cassette switch).
<NOTE6b>
The wire (WR6) has excess length that may be loose, as it is quite
•
long. After inserting the wire and connectors, the loose portion of the
wire should be taken up and accommodated between the A/C head
base and the main deck.
<NOTE7>
The REC safety board assembly is attached to the SW/Display board
•
assembly. It is therefore necessary to remove the REC safety board
assembly before removing the SW/Display board assembly.
1-1
Procedures for Lowering the Cassette holder assembly
As the mechanism of this unit is integrated with the Housing
assembly, the holder must be lowered and the two screws unscrewed when removing the Mechanism assembly.
(L2a)
(L2b)
Fig. 2
Fig. 1
Fig. 3
Turn the loading motor pulley in the direction as indicated by
Fig.2. As both
and ı levers are lodged twice, push the
Å
levers in the direction as indicated by Fig.3 to release them.
When pushing the levers, do it in the order of
Å, ı, ı, Å
When the holder has been lowered, turn the pulley until the
cassette holder is securely in place without allowing any up/
down movement.
Procedures for Lowering the Cassette holder assembly
(S1)
(L2b)
EARTH
PLATE
<NOTE 2>
(S2a)
.
2
(S2b)
Fig. D2
(S3)
1-2
1
3
(S1)
(S1)
Fig. D1Fig. D3
WR4a
(S6b)
(S6b)
(S6a)
<NOTE6a>
6
(L6)
Spacer
<NOTE6a>
(L6)
Spacer
<NOTE6a>
Q3003
End sensor
<NOTE6a>
Q3002
Start sensor
<NOTE6a>
WR6
FOIL SIDE
<NOTE4a>
<NOTE6b>
A/C head base
WR6
CN1
D3001
LED
<NOTE6a>
S3002
S cassette switch
<NOTE6a>
(L7c)
WR7
CN7001
SUPPORTING
TAPE SIDE
<NOTE2>
(L7b)
7
(L7a)
REC SAFETY
board assembly
<NOTE7>
FOIL SIDE
<NOTE 4a>
(L4a)
WR4b
SUPPORTING
TAPE SIDE
<NOTE 4a>
CN901
CN902
CN3012
4
(L4a)
WR4b
FRONT PANEL
BACK SIDE
(L4b)
(S4)
CN7192CN7191
JACK board
assembly
WR4a
(L4a)
(S5)
(S4)
WR4c
(L3)
(L4b)
FOIL SIDE
<NOTE4a>
Fig. D4
NOTE: When installing the DRUM assembly, secure the
screws (S5) in the order of a , b , c .
ROLLER ARM
ASSEMBLY
INERTIA PLATE
(L5a)
(P5)
(L5b)
5
(S5)
a
CN3501
c
WR5b
CN1
CON1
FOIL SIDE
<NOTE 4a>
a <NOTE4b>
WR5a
(S5)
b
FOIL SIDE
<NOTE 4a>
Fig. D6
Fig. D5
Fig. D7
1-3
(S8c)
(L8)
CN1902
(S8a)
(S8b)
GR board
assembly
FOIL SIDE
<NOTE4a>
WR8
CN1901
8
Fig. D8
1.4 SERVICE POSITION
In order to facilitate diagnosis and the repair of the Mechanism assembly, this unit is constructed so as to allow the
Mechanism and Main board assemblies to be removed together from the Bottom chassis assembly.
(5) Take out 2 screws C , 1 screw D and 1 screw E as
shown in Fig. 1-4-1.
(6) Take out 1 screw F as shown in Fig. 1-4-1, and remove
the GR board assembly. (Take care not to pull the flat
wire (Fig. D8) from CN1902.)
(7) Remove the Main board and Mechanism assemblies to-
gether while holding the edge of the Main board assembly. At this stage be careful of the power cord and prongs
of the jacks on the back side. (Refer to Fig. 1-4-2.)
(8) Remove the SW/Display board assembly and REC safety
board assembly. (Refer to page 1-3 of 1.3 DISASSEMBLY/ASSEMBLY METHOD. Take care not to pull the flat
wire (Fig. D7) from CN7001.)
1.4.1 How to take out the Mechanism and Main board
assemblies
(1) Remove the Top cover, Bracket, Front panel assembly
and JACK board assembly. (Refer to 1.3 DISASSEMBLY/
ASSEMBLY METHOD. )
(2) Lower the cassette holder, and make the preparations re-
quired in order to remove the screws from the Mechanism assembly. (Refer to the “Procedures for Lowering
the Cassette holder assembly” on page 1-2 of 1.3 DISASSEMBLY/ASSEMBLY METHOD.)
(3) Take out 2 screws
and 2 screws ı as shown in Fig.
Å
1-4-1.
(4) Remove the flat wires from CN3011 and CN1901 on the
Main board assembly.
D
E
B
F
Fig. 1-4-1
1-4
Fig. 1-4-2
(9) Place the SW/Display board assembly, REC safety board
assembly, JACK board assembly and GR board assembly on the front side and left side of the Mechanism and
Main board assemblies which was removed at the step
(7), then connect the flat wires into CN3011, CN1901,
CN901 and CN902 of the Main board assembly. (Refer
to Fig. 1-4-3.)
GR BOARD ASSEMBLY
CN901
CN902
CN1901
SW/DISPLAY BOARD ASSEMBLY
CN3012
CN3011
MAIN BOARD
ASSEMBLY
TO JOG
CN7191
CN7192
JACK BOARD
ASSEMBLY
REC SAFETY BOARD
ASSEMBLY
Fig. 1-4-3
(10)
Connect the power cord to the wall socket, and lift the
cassette holder.
(Before turning on the power make sure that there is nothing which may produce a short circuit, such as faulty soldering.)
Note:
• When carrying out diagnosis and repair of the Main
board assembly in the service position, be sure to
ground both the Main board and the Mechanism assemblies.
If they are improperly grounded, there may be noise
on the playback picture or the FDP counter display may
move even when the mechanism is kept in an inoperative status.
1.4.2 Precautions for cassette loading in the "SERVICE
POSITION"
The REC safety board assembly detects cassette loading as
well as cassette tabs. Therefore, after the assembly has been
removed in the "SERVICE POSITION", it is required to set
the switch manually on the REC safety board assembly when
a cassette is loaded.
1.4.3 Cassette loading and ejection methods in the
“SERVICE POSITION”(See Fig. 1-4-3).
(1) Insert a cassette halfway in the Cassette holder assem-
bly.
(2) Set the switch on the REC safety board assembly to ON
(by pressing the switch).
(3) As soon as the cassette starts to be loaded, set the switch
on the REC safety board assembly to OFF (by releasing
the switch).
(4) Now the desired operation (recording, playback, fast for-
ward, rewind, etc.) is possible in this status (the status
shown in Fig.1-4-3).
Notes:
• When performing diagnostics of the tape playback or
the recording condition in the "SERVICE POSITION",
enter the desired mode before turning the set upside
down, and do not change the mode when performing
diagnostics while the set is placed upside down. If you
want to switch the mode, turn the set to the normal position (the status shown in Fig.1-4-3).
• In the "SERVICE POSITION", the cassette tabs cannot
be detected and recording becomes possible even with
a cassette with broken tabs such as the alignment tape.
Be very careful not to erase important tapes.
(5) The switch on the REC safety board assembly does not
have to be operated when ejecting a tape. But be sure
to turn the set to the normal position before ejecting the
tape.
1.5 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”.
1.5.1 How to set the "MECHANISM SERVICE MODE"
(1) Disconnect VCR from AC.
(2) Connect TPGND and TP7001 (TEST) on the SW/Display
board assembly with a jump wire.
(3) Connect VCR to AC.
(4) Press the POWER button.
(5) With lock levers Åı on the left and right of the Cassette
holder assembly pulled toward the front, slide the holder
in the same direction as the cassette insertion direction.
(For the positions of lock levers Åı , refer to the “Pro-
cedures for Lowering the Cassette holder assembly” on
page 1-2 of 1.3 DISASSEMBLY/ASSEMBLY METHOD.)
(6) The cassette holder lowers and, when the loading has
completed, the mechanism enters the desired mode.
DEMOD board assembly
AUDIO ERASE
board assembly
NAVIGATION board assembly
GR board assembly
CN7191
JACK board assembly
S-SUB board assembly
CN1901
CN901
CN902
CN7192
TPGND
VR1401
D/A LEVEL ADJ
TP7001
(TEST)
Fig. 1-5-1
3D DIGITAL/4M board assembly
TERMINAL board assembly
TP4001
CTL.P
TP2253
A.FM
REC SAFFTY
board assembly
SW/DISPLAY board assembly
TP111
D.FF
TP106
PB.FM
CP4001
CP5301
CP5302
CN7001
MAIN board assembly
CN3012
TO JOG
CN3011
1-5
1.6 EMERGENCY DISPLAY FUNCTION
This unit has a function for storing the history of the past two
emergencies (EMG) and displaying them on each FDP. With the
status of the VCR and mechanism at the moment an emergency
occurred can also be confirmed.
1.6.1 Displaying the emergency information
(1) Transmit the code “59” from the Jig RCU.
The FDP shows the emergency content in the form of
“E:
:**”.
**
Example 1 E : 01 :
03
FDP display switching
FDP display
Notes:
• The emergency detail display
on the latest emergency.
It becomes “ – – : – – : – –” when there is no latest emergency record.
• When using the Jig RCU, set its custom code to match
the custom code of the VCR.
Jig RCU
[Data transmitting method]
Depress the “ ” ( 3 ) button
after the data code is set.
0 : 00 : 00
E: **:
1: *2 :
*
5: *6 :
*
CUSTOM CODE
43: A CODE
53: B CODE
DATA CODE
Fig. 1-6-1 Jig RCU [PTU94023B]
Normal display
Emergency content display
**
(E:Latest:Previous)
Emergency detail display
34
Emergency detail display
7
*
show the information
1 2
1
2
INITIAL MODE
Previous emergency
Latest emergency
––
Example 2E : –– :
Note:
• For the emergency content, see “1.6.3 Emergency content description”.
(2) Transmit the code “59” from the Jig RCU again.
The FDP shows the emergency detail information 1 in the
form of “
*
*
3 – : Mechanism sensor information at the moment of
– 4 : Mechanism mode position at the moment of emer-
Note:
• For the emergency detail information 1 , see “1.6.4 Emergency detail information
(3) Transmit the code “59” from the Jig RCU once again.
The FDP shows the emergency detail information
form of “
*
*
*
Note:
• For the emergency detail information
gency detail information
1 : *2 : 34”.
*
1 : Deck operation mode at the moment of emergency
2 : Mechanism operation mode at the moment of emer-
gency
emergency
gency
5 : *6 :
*
5 : Type of the cassette tape in use
7 ”.
*
6 : Winding position of the cassette tape in use
7 : Type of the cassette tape in use
No emergency record
1
”.
2
”.
2
in the
2
.
1
(Winding area)
2
, see “1.6.5 Emer-
(4) Transmit the code “59” from the Jig RCU once again to re-
set the display.
1.6.2 Clearing the emergency history
(1) Display the emergency history.
(2) Transmit the code “36” from the Jig RCU.
(3) Reset the emergency display.
(Y292-02e)
1-6
1.6.3 Emergency content description
Note:
Emergency contents “E08/E09” are for the model with Dynamic Drum (DD).
FDPCONTENTCAUSE
E01: Loading EMG
E02:
Unloading EMG
E03: Take Up Reel
Pulse EMG
E04: Drum FG
EMG
E05: Cassette Eject
EMG
E06: Capstan FG
EMG
E07: SW Power
Short-Circuit
EMG
E08:
DD Initialized
(Absolute
Position
Sensor)
EMG
E09: DD FG EMG
E0A:Supply Reel
Pulse EMG
EC1 or EU1:
Head clog warning
When the mechanism mode cannot be changed to another mode even when the loading motor has rotated
for more than 4 seconds in the loading direction, [E:01]
is identified and the power is turned off.
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.
When 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. However, the reel EMG is
not detected in STILL/SLOW modes.
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.
When the eject operation does not complete in 3 seconds after the start, [E:05] is identified, the pinch rollers
are turned off and stopped, and the power is turned off.
When the cassette insertion operation does not complete
in 3 seconds after the start, the cassette is ejected. In
addition, when the operation does not complete within
3 seconds after the start, [E:05] is also identified and the
power is turned off immediately.
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 STILL/SLOW/FF/REW modes.
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.
When DD tilting does not complete in 4 seconds, [E:08]
is identified, the tilt motor is stopped and the power is
turned off.
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.
When 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). However, note that the reel EMG
is not detected in the SLOW/STILL mode.
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:C1] or [E:U1]
is identified and recorded in the emergency history. During the period in which a head clog is detected, the FDP and OSD repeat the
“3-second warning display” and “7-second 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.
1
The mechanism is locked in the middle of mode transition.
2
The mechanism is locked at the loading end due to the encoder position
reading error during mode transition.
3
Power is not supplied to the loading MDA.
1
The mechanism is locked in the middle of mode transition.
2
The mechanism is locked at the unloading end due to the encoder position reading error during mode transition.
3
Power is not supplied to the loading MDA.
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;
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 take-up reel sensor does not output the FG pulse.
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.
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 supply reel sensor does not output the FG pulse.
3
Power is not supplied to the reel sensors.
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 is not supplied to the drum MDA.
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 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.
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 is not supplied to the capstan MDA.
1
The SW 5 V power supply circuit is shorted with GND.
2
The SW 12 V power supply circuit is shorted with GND.
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.
1 The FG sensor is defective. (The soldered parts have separated.)
2 The pull-up resistor at the FG 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 FG sensor.
4 The power to the sensor is not supplied. (Connection failure/soldering failure)
5 The FG pulse is not sent to the System Controller CPU.
6
The tilt motor is defective. (The soldered parts have separated.)
7 The drive power to the tilt motor is not supplied. (Connection failure/soldering failure)
8 The tilt motor drive MDA - IC is defective.
9 Auto-recovery of the DD tilting cannot take place due to overrun.
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 cas-
sette 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 FG pulse output from the supply reel sensor is absent.
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 FG pulse output from the take-up reel sensor is absent.
3
The power to a reel sensor is not supplied.
Table 1-6-1
1-7
1.6.4 Emergency 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 emergency can be confirmed based on
the figure in EMG detail information
.
1
[FDP display]
1 : *2 : 34
*
1 : Deck operation mode at the moment of emergency
*
2 :
Mechanism operation mode at the moment of emergency
*
3 – : Mechanism sensor information at the moment of
emergency
– 4 :
Mechanism mode position at the moment of emergency
Note:
• In the Deck operation mode/Mechanism operation mode/
Mechanism mode position, the contents of the code that
is shown on the FDP differs depending on the parts
number of the System Control microprocessor (IC3001)
of the VCR.
For the microprocessor parts number that starts with the
two letters “MN”, refer to the Table of MN and for parts
number with “HD”, refer to the Table of HD.
1: Deck Operation Mode
*
[Table of MN]
Display
00Mechanism being initialized
01STOP with pinch roller pressure off (or tape present with P.OFF)
02STOP with pinch roller pressure on
03POWER OFF as a result of EMG
04PLAY
0CREC
10Cassette ejected
20FF
21Tape fully loaded, START sensor ON, short FF
22
Cassette identification FWD SEARCH before transition to FF (SP x7-speed)
24FWD SEARCH (variable speed) including x2-speed
2CINSERT REC
40REW
42
Cassette identification REV SEARCH before transition to REW (SP x7-speed)
44REV SEARCH (variable speed)
4CAUDIO DUB
6CINSERT REC (VIDEO + AUDIO)
84FWD STILL/SLOW
85REV STILL/SLOW
8CREC PAUSE
8DBack spacing
8EForward spacing (FWD transport mode with BEST function)
AC INSERT REC PAUSE
AD INSERT REC Back spacing
CC AUDIO DUB PAUSE
CD AUDIO DUB Back spacing
EC INSERT REC (VIDEO + AUDIO) PAUSE
ED INSERT REC (VIDEO + AUDIO) Back spacing
Deck Operation Mode
[Table of HD]
Display
00STOP with pinch roller pressure off (or tape present with P.OFF)
01STOP with pinch roller pressure on
04PLAY
0EREC
11Cassette ejected
22FF
26FWD SEARCH (variable speed) including x2-speed
2EINSERT REC
43REW
47REV SEARCH (variable speed)
4CAUDIO DUB
6EINSERT REC (VIDEO+AUDIO)
84FWD STILL/SLOW
85REV STILL/SLOW
8FREC PAUSE
AFINSERT REC PAUSE
CD AUDIO DUB PAUSE
EFINSERT REC (VIDEO+AUDIO) PAUSE
Deck Operation Mode
2 : Mechanism Operation Mode
*
[Table of MN]
Display
00Command standby (Status without executing command)
02POWER OFF by EMG occurrence
04Moving to the adjacent position in the LOAD direction
06Moving to the adjacent position in the UNLOAD direction
08Cassette ejection being executed
0ACassette insertion being executed
0CTape being loaded
0ETape being unloaded
10Mode transition to STOP with pinch roller compression ON
12Mode transition to STOP with pinch roller compression OFF
14Mode transition to STOP with pinch roller compression OFF as a result
of POWER OFF
16Mode transition to STOP with pinch roller compression ON as a result of
POWER ON
18Mode transition to PLAY
1AMode transition to FWD SEARCH
1CMode transition to REC
1EMode transition to FWD STILL/SLOW
20Mode transition to REV STILL/SLOW
22Mode transition to REV SEARCH
24Mode transition from FF/REW to STOP
26Mode transition to FF
28Mode transition to REW
2A4 sec. of REV as a result of END sensor going ON during loading
2CShort FF/REV as a result of tape sensor going ON during unloading
2EMechanism position being corrected due to overrun
80Mechanism in initial position (Dummy command)
Mechanism Operation Mode
[Table of HD]
Display
00STOP with pinch roller pressure off
01STOP with pinch roller pressure on
02U/L STOP (or tape being loaded)
04PLAY
05PLAY (x1-speed playback using JOG)
0EREC
11Cassette ejected
22FF
26FWD SEARCH (variable speed) including x2-speed
2EINSERT REC
43REW
47REV SEARCH
4CAUDIO DUB
6EINSERT REC (VIDEO + AUDIO)
84FWD STILL/SLOW
85REV STILL/SLOW
8FREC PAUSE
AFINSERT REC PAUSE
C7REV SEARCH (x1-speed reverse playback using JOG)
CD AUDIO DUB PAUSE
EFINSERT REC (VIDEO + AUDIO) PAUSE
F0Mechanism being initialized
F1POWER OFF as a result of EMG
F2Cassette being inserted
F3Cassette being ejected
F4Transition from STOP with pinch roller pressure on to STOP with pinch
roller pressure off
F5Transition from STOP with pinch roller pressure on to PLAY
F6Transition from STOP with pinch roller pressure on to REC
F7Cassette type detection SEARCH before FF/REW is being executed
F8Tape being unloaded
F9Transition from STOP with pinch roller pressure off to STOP with pinch
roller pressure on
FATransition from STOP with pinch roller pressure off to FF/REW
FBTransition from STOP with pinch roller pressure off to REC.P (T.REC,etc.)
FC Transition from STOP with pinch roller pressure off to cassette type de-
tection SEARCH
FD Short REV being executed after END sensor on during unloading
FE Tension loosening being executed after tape loading (STOP with pinch
Tape being loaded/unloaded (When the pole base is located on the front
side of the position just beside the drum)
-5Tape being loaded/unloaded (When the pole base is located on the rear
side of the position just beside the drum)
-6Pole base compressed position
-7FF/REW position
-8Between FF/REW and STOP with pinch roller compression ON
-9STOP with pinch roller compression OFF
-A Between STOP with pinch roller compression OFF and REV
-B REV (REV STILL/SLOW) position
-C Between REV and FWD
-D FWD (FWD STILL/SLOW) position
-E Between FWD and PLAY
-F PLAY position
Mechanism Mode Position
[Table of HD]
Display
–0EJECT position
–1U/L STOP position
–2Tape being loaded/unloaded (When the pole base is located on the rear
side of the position just beside the drum)
–3FF/REW position
–4STOP with pinch roller pressure off
–5REV (REV STILL/SLOW) position
–6FWD (FWD STILL/SLOW) position, PLAY position
–7Intermediate position during transition between other mechanism modes
Mechanism Mode Position
Note:
• As the display is always “–7” at any intermediate position
between mechanism modes, the position of transitory
EMG may sometimes not be locatable.
1.6.5 Emergency 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 infor-
2
.
mation
[FDP display]
5 : *6 :
*
*
*
*
Note:
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)
• 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.
5 : Cassette tape type
*
DisplayCassette Tape Type
00Cassette type not identified
16
Large reel/small reel (T-0 to T-15/T-130 to T-210) not classified
82Small reel, thick tape (T-120) identified/thin tape (T-140) identified
84Large reel (T-0 to T-60) identified
92
Small reel, thick tape (T-130) identified/thin tape (T-160 to T-210) identified
93
Small reel, thick tape/C cassette (T-0 to T-100/C cassette) not classified
C3
Small reel, thick tape/C cassette (T-0 to T-100/C cassette) being classified
D3
Small reel, thick tape/C cassette (T-0 to T-100/C cassette) being classified
E1C cassette, thick tape (TC-10 to TC-20) identified
E2Small reel, thick tape (T-0 to T-100) identified
E9C cassette, thin tape (TC-30 to TC-40) identified
C cassette, thick tape/thin tape (TC-10 to TC-40) not classified
F1
1
1
Notes:
•
Cassette tape type
is identified a few times during mode tran-
1
sition 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 22 sections using a hex number from “00” to “15”.
“00” : End of winding
“15” : Beginning of winding
“FF” : Tape position not identified
7 : Cassette tape type
*
DisplayCassette Tape Type
00
Cassette type not identified
07
Small reel, thick tapeT-5
08 - 0E
C cassette, thick tapeTC-10
09 - 15
0A - 0B
0D - 0F
19 - 1D
1D - 21
1E - 1F
2D - 2F
C cassette, thick tapeTC-20P
Small reel, thick tapeT-20
0A - 16
C cassette, thin tapeTC-30
0A - 16
C cassette, thin tapeTC-40
Small reel, thick tapeT-40
11 - 14
Small reel, thick tapeT-60
15 - 18
Small reel, thick tapeT-80/DF-160
17 - 1A
Small reel, thick tapeT-80/DF-180
Small reel, thick tapeT-100
Small reel, thick tapeT-120/DF-240
Small reel, thin tapeT-140
1F - 23
Small reel, thick tapeT-130
21 - 23
Small reel, thin tapeT-160
21 - 23
Small reel, thin tapeT-168
22 - 24
Small reel, thick tapeDF-300
22 - 24
Small reel, thin tapeT-180/DF-380
22 - 24
Small reel, thin tapeT-210/DF-420
22 - 23
Large reelT-5
23 - 24
Large reelT-10
25 - 26
Large reelT-20
27 - 29
Large reelT-30
29 - 2B
Large reelT-40
Large reelT-60
(Winding area)
2
2
Note:
• The values of cassette tape type 2 in the above table are
typical values with representative cassette tapes.
1-9
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