JVC HR-V610EX, HR-V611EX, HR-V610EY, HR-V611EY, HR-V612EX Service Manual
...
SERVICE MANUAL
VIDEO CASSETTE RECORDER
YD01020045
HR-V610EX, HR-V610EY, HR-V610EZ,
HR-V611EX, HR-V611EY, HR-V611EZ,
HR-V612EX, HR-V612EY, HR-V612EZ,
HR-V615EK, HR-V616EK, HR-V617EK,
HR-V715EK
PAL
SAT
SAT
VCR
VCR
REVIEW
REVIEW
(EK models)
HR-V610EX, HR-V610EY, HR-V610EZ, HR-V611EX, HR-V611EY,
HR-V611EZ, HR-V612EX, HR-V612EY, HR-V612EZ, HR-V615EK,
HR-V616EK, HR-V617EK, HR-V715EK [V17D1,V17D1+]
For disassembling and assembling of MECHANISM ASSEMBLY, refer to the SERVICE MANUAL No.86700(MECHANISM ASSEMBLY).
(EX, EY, EZ models)
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
COPYRIGHT © 2004 Victor Company of Japan, Limited
No.YD010
2004/5
SPECIFICATION
HR-V610EX, HR-V610EY, HR-V610EZ,
HR-V611EX, HR-V611EY, HR-V611EZ,
HR-V612EX, HR-V612EY, HR-V612EZ
GENERAL
Power requirement AC 220 V -240 V, 50 Hz/60 Hz
Power consumption
Power on 14 W
Power off 3.2 W
Temperature
Operating 5°C to 40°C
Storage -20°C to 60°C
Operating position Horizontal only
Dimensions (W × H × D) 400 mm × 94 mm × 265 mm 400 mm × 94 mm × 275 mm 400 mm × 94 mm × 270 mm
Weight 3.1 kg
Format VHS PAL standard
Maximum recording time
(SP) 240 min. with E-240 video cassette
(LP) 480 min. with E-240 video cassette
VIDEO/AUDIO
Signal system PAL-type colour signal and CCIR monochrome signal, 625 lines 50 fields
Recording system DA4 (Double Azimuth) head helical scan system
Signal-to-noise ratio 45 dB
Horizontal resolution 250 lines
Frequency range
Normal audio 70 Hz to 10,000 Hz
Hi-Fi audio 20 Hz to 20,000 Hz
Input/Output 21-pin SCART connectors: IN/OUT × 1, IN/DECODER × 1
RCA connectors: AUDIO OUT × 1
TUNER/TIMER
TV channel storage capacity 99 positions (+AUX position)
Tuning system Frequency synthesized tuner
Channel coverage VHF: 47 MHz - 89 MHz/104 MHz - 300MHz/
302 MHz - 470 MHz
UHF: 470 MHz - 862 MHz
Aerial output UHF channels 22 -69 (Adjustable)
Memory backup time Approx. 10 min.
ACCESSORIES
Provided accessories RF cable, Infrared remote control unit, “R6(AA)” battery × 2
Optional accessories Satellite Controller RM-SD1 -
HR-V615EK, HR-V616EK,
HR-V617EK
VHF: 44.5 MHz - 143 MHz/143 MHz - 470 MHz
UHF: 470 MHz - 862 MHz
HR-V715EK
Specifications shown are for SP mode unless otherwise specified.
E.& O.E. Design and specifications subject to change without notice.
1-2 (No.YD010)
SECTION 1
r
e
PRECAUTION
1.1 SAFTY PRECAUTIONS
Prior to shipment from the factory, JVC products are strictly inspected to conform with the recognized product safety and electrical codes of the countries in which they are to be
sold.However,in order to maintain such compliance, it is equally
important to implement the following precautions when a set is
being serviced.
1.1.1 Precautions during Servicing
(1) Locations requiring special caution are denoted by labels
and inscriptions on the cabinet, chassis and certain parts of
the product.When performing service, be sure to read and
comply with these and other cautionary notices appearing
in the operation and service manuals.
(2) Parts identified by the symbol and shaded ( ) parts
are critical for safety.
Replace only with specified part numbers.
NOTE :
Parts in this category also include those specified to
comply with X-ray emission standards for products
using cathode ray tubes and those specified for
compliance with various regulations regarding spurious radiation emission.
(3) Fuse replacement caution notice.
Caution for continued protection against fire hazard.
Replace only with same type and rated fuse(s) as specified.
(4) Use specified internal wiring. Note especially:
• Wires covered with PVC tubing
• Double insulated wires
• High voltage leads
(5) Use specified insulating materials for hazardous live parts.
Note especially:
• Insulation Tape
• PVC tubing
•Spacers
• Insulation sheets for transistors
•Barrier
(6) When replacing AC primary side components (transformers,
power cords, noise blocking capacitors, etc.) wrap ends of
wires securely about the terminals before soldering.
Consequently, when servicing these products, replace the
cathode ray tubes and other parts with only the specified
parts. Under no circumstances attempt to modify these circuits.Unauthorized modification can increase the high voltage value and cause X-ray emission from the cathode ray
tube.
(12) Crimp type wire connectorIn such cases as when replacing
the power transformer in sets where the connections between the power cord and power trans former primary lead
wires are performed using crimp type connectors, if replacing the connectors is unavoidable, in order to prevent safety hazards, perform carefully and precisely according to the
following steps.
• Connector part number :E03830-001
• Required tool : Connector crimping tool of the proper
type which will not damage insulated parts.
• Replacement procedure
a) Remove the old connector by cutting the wires at a
point close to the connector.Important : Do not reuse a connector (discard it).
cut close to connector
Fig.1-1-3
b) Strip about 15 mm of the insulation from the ends
of the wires. If the wires are stranded, twist the
strands to avoid frayed conductors.
15 mm
Fig.1-1-4
c) Align the lengths of the wires to be connected. In-
sert the wires fully into the connector.
Metal sleeve
Fig.1-1-1
(7) Observe that wires do not contact heat producing parts
(heatsinks, oxide metal film resistors, fusible resistors, etc.)
(8) Check that replaced wires do not contact sharp edged or
pointed parts.
(9) When a power cord has been replaced, check that 10-15
kg of force in any direction will not loosen it.
Power cord
Fig.1-1-2
(10) Also check areas surrounding repaired locations.
(11) Products using cathode ray tubes (CRTs)In regard to such
products, the cathode ray tubes themselves, the high voltage circuits, and related circuits are specified for compliance with recognized codes pertaining to X-ray emission.
Connector
Fig.1-1-5
d) As shown in Fig.1-1-6, use the crimping tool to crimp
the metal sleeve at the center position. Be sure to
crimp fully to the complete closure of the tool.
1.25
2.0
5.5
Crimping tool
Fig.1-1-6
e) Check the four points noted in Fig.1-1-7.
Not easily pulled free
Wire insulation recessed
more than 4 mm
Crimped at approx. cente
of metal sleev
Conductors extended
Fig.1-1-7
(No.YD010)1-3
1.1.2 Safety Check after Servicing
Examine the area surrounding the repaired location for damage
or deterioration. Observe that screws, parts and wires have been
returned to original positions, Afterwards, perform the following
tests and confirm the specified values in order to verify compliance with safety standards.
(1) Insulation resistance test
Confirm the specified insulation resistance or greater between power cord plug prongs and externally exposed
parts of the set (RF terminals, antenna terminals, video and
audio input and output terminals, microphone jacks, earphone jacks, etc.).See table 1 below.
(2) Dielectric strength test
Confirm specified dielectric strength or greater between
power cord plug prongs and exposed accessible parts of
the set (RF terminals, antenna terminals, video and audio
input and output terminals, microphone jacks, earphone
jacks, etc.). See Fig.1-1-11 below.
(3) Clearance distance
When replacing primary circuit components, confirm specified clearance distance (d), (d') between soldered terminals, and between terminals and surrounding metallic
parts. See Fig.1-1-11 below.
d
Chassis
d'
Power cord
primary wire
Fig.1-1-8
(4) Leakage current test
Confirm specified or lower leakage current between earth
ground/power cord plug prongs and externally exposed accessible parts (RF terminals, antenna terminals, video and
audio input and output terminals, microphone jacks, earphone jacks, etc.).
Measuring Method : (Power ON)Insert load Z between
earth ground/power cord plug prongs and externally exposed accessible parts. Use an AC voltmeter to measure
across both terminals of load Z. See Fig.1-1-9 and following Fig.1-1-12.
ab
Externally
exposed
accessible part
Z
V
c
A
Fig.1-1-9
(5) Grounding (Class 1 model only)
Confirm specified or lower grounding impedance between
earth pin in AC inlet and externally exposed accessible
parts (Video in, Video out, Audio in, Audio out or Fixing
screw etc.).Measuring Method:
Connect milli ohm meter between earth pin in AC inlet and
exposed accessible parts. See Fig.1-1-10 and grounding
specifications.
AC inlet
Earth pin
Exposed accessible part
MIlli ohm meter
Grounding Specifications
Region
USA & Canada
Europe & Australia
Grounding Impedance (Z
Z 0.1 ohm
Z 0.5 ohm
)
Fig.1-1-10
AC Line Voltage
100 V
100 to 240 V
110 to 130 V
110 to 130 V
200 to 240 V
Region
Japan
USA & Canada
Europe & Australia
Insulation Resistance (R
R 1 M /500 V DC
1 M R 12 M /500 V DC
R 10 M /500 V DC
)
Dielectric Strength
AC 1 kV 1 minute
AC 1.5 kV 1 minute
AC 1 kV 1 minute
AC 3 kV 1 minute
AC 1.5 kV 1 minute
(
Class
(
Class
Clearance Distance (d), (d'
d, d' 3 mm
d, d' 4 mm
d, d' 3.2 mm
d 4 m m
)
d' 8 m m (Power cord
d' 6 m m (Primary wire
)
Fig.1-1-11
AC Line Voltage
100 V
110 to 130 V
110 to 130 V
220 to 240 V
Region
Japan
USA & Canada
Europe & Australia
Load Z Leakage Current (i)
1
0.15
1.5
2
50
i 1 mA rms
i 0.5 mA rms
i 0.7 mA peak
i 2 mA dc
i 0.7 mA peak
i 2 mA dc
a, b, c
Exposed accessible parts
Exposed accessible parts
Antenna earth terminals
Other terminals
Fig.1-1-12
NOTE :
These tables are unofficial and for reference only. Be sure to confirm the precise values for your particular country and locality.
)
)
)
1-4 (No.YD010)
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
2.1 DIFFERENT TABLE OF FEATURE
The following table indicates main different points between models HR-V610EX, HR-V610EY, HR-V610EZ, HR-V611EX, HR-V611EY,
HR-V611EZ ,HR-V612EX, HR-V612EY, HR-V612EZ, HR-V615EK, HR-V616EK, HR-V617EK, and HR-V715EK.
HR-V610EX, HR-
V610EY, HR-V610EZ
POWER PLUG CEE ←←BS
BODY COLOR PURE SILVER BLACK PURE SILVER ←
ADVANCED JOG DIAL NOT USED ←←←
PAL/MESECAM
VHS
REAR L-2 INPUT SCART IN/DECODER ←←SCART IN
BROADCASTING
STANDARD
STEREO DECODER NICAM/A2 ←←NICAM
RF OUT CH/RF OUT
SYSTEM[INITIAL]
VCR PLUS+ SHOWVIEW DELUXE ←←VIDEOPLUS+ DELUXE
VPS/PDC USED ←←NOT USED
OSD LANGUAGES 13 LANGUAGES ←←ENGLISH
POWER PLUG BS ←←
BODY COLOR BLACK PURE SILVER ←
ADVANCED JOG DIAL NOT USED ← USED
VHS PAL/NTSC PB on
REAR L-2 INPUT SCART IN ←←
BROADCASTING
STANDARD
STEREO DECODER NICAM ←←
RF OUT CH/RF OUT
SYSTEM[INITIAL]
VCR PLUS+ VIDEOPLUS+ DELUXE ←←
VPS/PDC NOT USED ←←
OSD LANGUAGES ENGLISH ←←
(MANUAL)/NTSC PB on
PAL TV with HiFi
B/G, D/K ←← I
22-69CH,
OFF[AUTO]/G,K
HR-V616EK HR-V617EK HR-V715EK
PAL TV with HiFi
I ←←
22-69CH,
OFF[AUTO]/I
HR-V611EX, HR-
V611EY, HR-V611EZ
←←
←←
←←
←←
HR-V612EX, HR-
V612EY, HR-V612EZ
HR-V615EK
PAL/NTSC PB on
PAL TV with HiFi
22-69CH,
OFF[AUTO]/I
NOTE:
Mark ← is same as left.
(No.YD010)1-5
2.2 Service position
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.
2.2.1 How to set the "Service position"
(1) Refer to the disassembly procedure and perform the disas-
sembly 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 assem-
blies.
(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. 2-2a.)
(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 as-
sembly.
Notes:
• Before inserting the power cord plug into the power out-
let, 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 "3.1 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 cas-
sette 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 assem-
blies 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.
TP4001
TP106
CTL.P
PB.FM
TP2254
C3025
TIMER
CLOCK
A.REC.FM
TP2253
A.PB.FM
TP111
D.FF
Main board
assembly
2.3 Jig RCU mode
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.
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.
User RCU mode
Jig RCU mode
( : not displayed)
2.3.1 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.
2.3.2 Setting the User RCU mode
(1) Turn off the power.
(2) Press the "REC" and "PAUSE" buttons of the VCR simulta-
neously. Alternatively, transmit the code "80" from the Jig RCU.
2.4 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".
2.4.1 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.
2.4.2 How to exit from the "Mechanism service mode"
(1) Unplug the power cord plug from the power outlet.
Fig.2-2a
1-6 (No.YD010)
2.5 Maintenance and inspection
2.5.1 Cleaning
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.
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 com-
pletely dry before using the cassette tape.
A/C head
Video heads
Fig.2-5a
2.5.2 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.
2.5.3 Suggested servicing schedule for main components
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.
System Parts name
Operation hours
1000H 2000H
Drum assembly C,X X
A/C head C,X C,X
Pinch roller arm assembly C C
Tape
transport
Full erase head C C
Tension arm assembly C C
Capstan motor (Shaft) C C
Guide arm assembly C C
Capstan motor X
Capstan brake assembly X
Main brake assembly X
Drive
Belt (Capstan) X X
Loading motor X
Clutch unit X
Worm gear X
Control plate X
Other Rotary encoder X
C : Cleaning
X : Inspection or Replacement if necessary
(No.YD010)1-7
SECTION 3
DISASSEMBLY
3.1 Removing the major parts
3.1.1 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.
Step/
Loc No.
[1] Top cover 3-1a
(1) (2) (3) (4) (5)
Part Name
Bracket 2(S1c)
(1) Order of steps in Procedure
When reassembling, perform the step(s) in the reverse order.
These numbers are also used as the identification (loca-
tion) 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.
(5) Adjustment information for installation
3.1.2 Disassembly procedure
Step/
Loc No.
[1] Top cover
[2] Front panel assembly
[3] Mechanism assembly
[4]
[5]
Part Name
(Drum assembly)
Main board assembly
Bottom cover
< Note 2a >
• 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.
Fig.
No.
----------------------------------------
Fig.
No.
3-1d
3-1d
3-1a
3-1d
3-1b
3-1c
3-1d
3-1d
Point Note
4(S1a),(S1b),3(L1a), <Note 1a>
2(SD1a),(P1a),(W1a),
CN1(WR1a),
Point
4(S1a), (S1b)
2(S2a), 6(L2a), 3(L2b) <
CN7001(WR2a)
CN2001(WR3a),
2(S3a)
--------------------------
CN1(WR3b),
(S3c), (S3d), (S3e),
3(S4a),(S4b)
4(L5a),3(L5b),3(L5c)
Note
Note 2a
Note 3a
<
<
Note 3a
<
Note 3b
<
Note 3c
<
Note 3d
>
>
>
>
>
>
Door
opener
Side
frame(R)
Switch
knob
Switch
lever
Fig.3-1a
< Note 3a >
• 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 3b >
• When reattaching the Mechanism assembly, secure the
screws (S3a to S3b) in the order of a, b.
< Note 3c >
• 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 "MECHANISM ASSEMBLY
SERVICE MANUAL (No. 86700)".]
• 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 3d >
• When reattaching the Drum assembly, secure the screws (S3c
to S3e) in the order of c, d, e.
Mechanism
assembly
(S3d)
(S3c)
(S3e)
Drum
assembly
<Note 3c>
(S3d)
<NOTE>
Attach the Drum assembly appropriately,
since the installation state of the Drum assembly
influences the FM WAVEFORM LINEARITY
greatly.
(S3c)
(S3e)
HOOK
Fig.3-1b
• 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
1-8 (No.YD010)
Fig.3-1c
[3]Machanism assembly
<Note 3c>
NOTE) CONFIRM THE DOOR OPENER IS DOWN.ATTACH THE
F.PANEL AFTER THE CASSETE DOOR IS LIFTED UP.
SAT CTL board assembly
JS3001
<Phase alignment>
.
Accord the position of V gap on R.ENCORDER and PWB silk
.
Accord the position of Boss on R.ENCORDER and PWB silk
[2]Front panel assembly
<Note 2a>
[4]Main board assembly
(L2a)
(L2a)
(L2b)
(L2a)
[3]Drum assembly
(S3a)
(S3c)
<Note 3d>
c
<Note 3d>
(S3e)
<Note 3d>
(S3d)
<Note 3d>
(S1a)
(S3a)
c
d
(S1b)
[1]Top cover
(S1a)
(S4a)
Q3002
g
(S4a)
b
g
(S4b)
d
d'
d'
(S4a)
c
c'
c'
Insert the bushing of POWER CORD
so as not to twist the cord.
CN5001
(L5a)
NOTE
1. Insert direction of FFC WIRE as follows.
right side
electrode side
2. FFC WIRE and DRUM FPC WIRE
should be insert as follows.
OK
90
CN
3. Insert direction of POWER CORD.
US/UC/JPN
WHITE LINE
(L5c)
NEUTRAL
CN5001
back side
supporting side
NG
CN CN
except US/UC/JPN
BLUE
NEUTRAL
CN5001
c
Q3003
b
c'
D3001
JS3001
(S2a)
k
m
m
(S2a)
Bottom chassis
Cassette door
<Note 2a>
BOTTOM SIDE
TOP SIDE
[5]Bottom cover
(L2b)
NOTE) WHEN YOU FIX ANY PWB WITH THE SCREW.
PUT IT ON THE JIGS.
<Note 3a>
CN7003
CN7004
Adv.jog board assembly
NOTE) INSERT FFC WIRE TO THE CONNECTOR BEFORE
ATTACHING TO FRONT PANEL.
Fig.3-1d
(WR2a)
(L5b)
Dress WIRE between L6002 and C7128,
At this time ensure WIRE is laid on the PWB.
(To prevent interferance from WIRE to TU
PACK)
C7128
L6002
CN1601
CN512
CN7102
(L5a)
DRUM
<WR3b>
<Note 3a>
Ensure wire is not slanting after insert.
CN2001
A/C HEAD
<WR3a>
<Note 3a>
CN5001
Bend
CN7001
back side
(No.YD010)1-9
SECTION 4
ADJUSTMENT
4.1 Before adjustment
4.1.1 Precaution
• The adjustments of this unit include the mechanism com-
patibility 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.
4.1.2 Required test equipments
• 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 [PAL]
• Recording tape
• Digit-key remote controller(provided)
4.1.3 Required adjustment tools
--- : Not used
z
: Used
Mechanism
compatibility
adjustment
Roller driver
z ---
Jig RCU --- z
Back tension cassette gauge z ---
Alignment tape(MHPE) z ---
Alignment tape(MHPE-L) zz
Roller driver
PTU94002
Alignment tape
(SP, stairstep, PAL)
MHPE
Jig RCU
PTU94023B
Alignment tape
(LP, stairstep, PAL)
MHPE-L
Back tension cassette gauge
Electrical
adjustment
PUJ48076-2
4.1.4 Color (colour) bar signal,Color (colour) bar pattern
Colour bar signal [PAL]
White(100%)
White(75%)
0.7 V
1V
0.3 V
Horizontal sync
Yellow
Cyan
Green
Magenta
Red
VU
V(R-Y)
U(B-Y)
Blue
Burst
Colour bar pattern [PAL]
(75%)
Cyan
White
Yellow
0.3 V
V
White
U Black
100%
Green
Magenta
Red
Blue
4.1.5 Switch settings
When adjusting this unit, set the VCR mode and switches
as described below.
• 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 2 SPECIFIC SERVICE INSTRUCTIONS".)
Jig RCU
[Data transmitting method]
Depress the " "( 3 ) button
after the data code is set.
CUSTOM CODE
43: A CODE
DATA CODE
INITIAL MODE
Fig.4-1a 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.
PICTURE CONTROL/SMART PICTURE NORMAL/NATURAL
VIDEO STABILIZER OFF
TBC ON
Digital 3R ON
VIDEO NAVIGATION/TAPE MANAGER OFF
BLUE BACK OFF
OFF
1-10 (No.YD010)
4.1.6 Manual tracking mode (Auto tracking ON/OFF) set-
ting
(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 manual tracking mode is set, the tracking is
placed at the center position.
(2) Press "channel +/-" to adjust the tracking manually.
4.2 Mechanism compatibility 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 compat-
ibility 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.4-2b.)
4.2.1 Tension pole position
Notes:
• This adjustment must be performed every time the ten-
sion band is replaced.
Signal (A) • Back tension cassette gauge [PUJ48076-2]
Mode (B1)
Adjustment part (F) • Adjust pin [Mechansim assembly]
Specified value (G)
•PB
(B2)
• Eject end
• 25 - 51 gf·cm (2.45 - 5 x 10
-3
Nm)
(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.4-2a.)
a) Remove the top frame, cassette holder and side
frames (L/R) all together. (Refer to the SERVICE
MANUAL No.86700 [MECHANISM ASSEMBLY].)
b) 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).
c) Adjust by turning the adjustment pin so that the tip of
the tension arm is aligned with the stamping (b) on
the main deck.
d) 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.
4.2.2 FM waveform linearity
Signal (A1)
Mode (B) • PB
Equipment (C) • Oscilloscope
Measuring point (D) • TP106 (PB. FM)
External trigger (E) • TP111 (D. FF)
Adjustment part (F) • Guide roller [Mechanism assembly]
Specified value (G) • Flat V. PB FM waveform
Adjustment tool (H) • Roller driver [PTU94002]
• Alignment tape(SP, stairstep, PAL) [MHPE]
(A2)
• Alignment tape(LP, stairstep, PAL) [MHPE-L]
(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. 4-2c.)
(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 roll-
er 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. 4-2c.)
(6) Make sure that the V.PB FM waveform varies in parallel
and linearly with the tracking operation again. When re-
quired, 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. 4-2b.)
[Perform adjustment step (9) only for the models equipped
with SP mode and EP (or LP) mode.]
[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
Proper
TENSION ARM
Stamping(b)
OK
ADJUST PIN
NG
Fig.4-2a
CONTROL PLATE
Stamping(a)
(b)
GUIDE POLE
Fig.4-2b
(No.YD010)1-11
Proper waveform variation
Improper waveform variation
A
C
Up Down
B
D
Roller driver
Guide roller
(supply side)
Fig.4-2c
4.2.3 Height and tilt of the A/C head
Note:
• Set a temporary level of the height of the A/C head in ad-
vance to make the adjustment easier after the A/C head
has been replaced. (Refer to the SERVICE MANUAL
No.86700 [MECHANISM ASSEMBLY].)
Signal (A) • Alignment tape(SP, stairstep, PAL) [MHPE]
Mode (B) • PB
Equipment (C) • Oscilloscope
Measuring point (D1)
External trigger (E) • TP111 (D. FF)
Adjustment part (F) • A/C head [Mechanism assembly]
Specified value (G) • Maximum waveform
• TP106 (PB. FM)
(D2)
• TP4001 (CTL. P)
(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 wave-
form 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 azi-
muth.
Head base
(2)
(1)
AUDIO OUT
4.2.4 A/C head phase (X-value)
Signal (A1)
Mode (B) • PB
Equipment (C) • Oscilloscope
Measuring point (D) • TP106 (PB. FM)
External trigger (E) • TP111 (D. FF)
Adjustment part (F) • A/C head base [Mechanism assembly]
Specified value (G) • Flat V. PB FM waveform
Adjustment tool (H) • Roller driver [PTU94002]
• Alignment tape(SP, stairstep, PAL) [MHPE]
(A2)
• Alignment tape(LP, stairstep, PAL) [MHPE-L]
(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. 4-
2e.)
(5) Rotate the roller driver so that the A/C head comes closest
to the capstan. From there, move the A/C head back grad-
ually toward the drum until the point where the FM wave-
form 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 cen-
ter position.
To the drum
Toward the capstan
Toward the drum
A/C head
Screw (5)
Roller driver
Screw (4)
Head base
To the capstan
Fig.4-2e
Alignment tape
[SP, stairstep]
played with the
SP head
Waveform output
X-value adjustment point
Drum side Control head position Capstan side
Alignment tape
[EP(LP), stairstep]
played with the
EP(LP) head
A/C head
(3)
Fig.4-2d
1-12 (No.YD010)
CTL. P
Maximum
Fig.4-2f
4.3 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.
4.3.1 Servo circuit
4.3.1.1 Switching point
Signal (A1)
Mode (B) • PB
Equipment (C) • Oscilloscope
Measuring point (D) • VIDEO OUT terminal (75Ω terminated)
External trigger (E) • TP111 (D. FF)
Adjustment part (F) • Jig RCU: Code “5A”
Specified value (G) • 6.5±0.5H
Adjustment tool (H) • Jig RCU [PTU94023B]
• Stairstep signal
(A2)
• Alignment tape(LP, stairstep, PAL) [MHPE-L]
• TP106 (PB. FM)
(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 mea-
suring 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).
Trigger point
Switching point
V.sync
V. rate
Fig.4-3a Switching point
4.3.1.2 Slow tracking preset
Signal (A1)
Mode (B1)
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]
• Ext. input
(A2)
• Color (colour) bar signal [PAL]
• SP
(B2)
•LP
(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.
4.3.2 Syscon circuit [EX, EY, EZ MODELS]
Notes:
• When perform this adjustment, remove the Mechanism
assembly.
4.3.2.1 Timer clock
Signal (A1) • No signal
Mode (B) • EE
Equipment (C) • Frequency counter
Measuring point (D1)
Adjustment part (F) • C3025 (TIMER CLOCK)
Specified value (G) • 1024.008 ± 0.001 Hz
• IC3001 pin 44
(D2)
• IC3001 pin 103
(D3)
• C3054 + and -
(976.5549 ± 0.0010 usec)
(1) Connect the frequency counter to the measuring point
(D1).
(2) Connect the short wire between the short point (D2) and
Vcc (5V).
(3) Short the leads of capacitor (D3) once in order to reset
the microprocessor of the Syscon.
(4) Disconnect the short wire between the short point (D2)
and Vcc then connect it again.
(5) Adjust the Adjustment part (F) so that the output frequency
becomes the specified value (G).
(No.YD010)1-13
SECTION 5
TROUBLESHOOTING
5.1 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 per-
form the disassembly of the major parts before removing
the mechanism assembly. (See Fig. 5-1a)
Fig.5-1a
Tension arm assembly
Pole base assembly
Pinch roller arm assembly
(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.5-1b )
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 dis-engaging the hooks (a) and (b).
Screw(a)
Cassette tape
Hook(a)
Cassette holder
Top frame
Side frame(R)
Screw(a)
Spring(a)
Direction of unloading
Side frame(L)
Hook(b)
Fig.5-1c
(6) Take up the slack of the tape into the cassette. This com-
pletes removal of the cassette tape.
Fig.5-1b
1-14 (No.YD010)
5.2 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.
CUSTOM CODE
43: A CODE
DATA CODE
INITIAL MODE
Fig.5-2a Jig RCU [PTU94023B]
5.2.1 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 informa-
tion on the latest EMG.
It becomes " - - : - - : - -" when there is no latest EMG
record.
0: 00
E: **
1E: **
1: *1
2: *2
3: 34
4: *5
5: *6
6: *7
7: *8
8: *9
9: *10
Normal display
EMG content display (Latest) See 5.2.4
EMG content display (Previous) See 5.2.4
EMG detail information <1> See 5.2.5
[Deck operation mode]
EMG detail information <1> See 5.2.5
[Mechanism operation mode]
EMG detail information <1> See 5.2.5
[Mechanism sensor information and Mechanism mode position]
EMG detail information <2> See 5.2.6
[Type of the cassette tape in use <1>]
EMG detail information <2> See 5.2.6
[Winding position of the cassette tape in use]
EMG detail information <2> See 5.2.6
[Type of the cassette tape in use <2> (Winding area)]
EMG detail information <3> See 5.2.7
[Previous deck operation mode]
EMG detail information <3> See 5.2.7
[The deck operation mode of the one before the last]
EMG detail information <3> See 5.2.7
[The deck operation mode of the one prior to one above]
EMG display of 7segment LED display model
Fig.5-2b
0 : 00 : 00
E:** :**
*1 : *2 : 34
*5: *6 : *7
*8: *9 : *10
Normal display (Counter or clock)
EMG content display (E:Latest:Previous) See 5.2.4
[EMG code display mode]
EMG detail information <1> display See 5.2.5
[Deck and other mode display mode]
EMG detail information <2> display See 5.2.6
[Cassette display mode]
EMG detail information <3> display See 5.2.7
[Deck mode history dispaly mode]
EMG display of FDP display model
Fig.5-2c
< Reference > EMG display of FDP display mode
(1) Transmit the code "59" from the Jig RCU.
The FDP shows the EMG content in the form of "E:**:**".
<Example 1> E : 01
Latest EMG
<Example 2> E : - -
No EMG record
(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 ".
*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 re-
set the display.
5.2.2 Clearing the EMG history
(1) Display the EMG history.
(2) Transmit the code "36" from the Jig RCU.
(3) Reset the EMG display.
(No.YD010)1-15
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