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SERVICE MANUAL
COMPACT VHS CAMCORDER
GR-SXM161US,GR-SXM256UC,
GR-SXM260UC,GR-SXM260US,
GR-SXM265UC,GR-SXM265US
GR-SXM161US[M4C623],GR-SXM256UC[M4C622],GR-SXM260UC[M4C623]
GR-SXM260US[M4C623],GR-SXM265UC[M4C623],GR-SXM265US[M4C623]
For disassembling and assembling of MECHANISM ASSEMBLY, refer to the SERVICE MANUAL No.86700 (MECHANISM ASSEMBLY).
TABLE OF CONTENTS
1
2
3
4
5
COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LIMITED
No.YF016
2003/12
SPECIFICATION
(The specifications shown pertain specifically to the model GR-SXM260)
1-2 (No.YF016)
SECTION 1
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 are critical for safety.
symbol and shaded ( ) parts
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.
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.
(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.
Insert 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
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.
2.0
1.2
5
5.5
Crimping tool
Fig.1-1-6 e) Check the four points noted in Fig.1-1-7.
Not easily pulled free
Crimped at approx. center of metal sleeve
Wire insulation recessed more than 4 mm
Fig.1-1-7
Conductors extended
(No.YF016)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 ' d
(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.
a b
Z
Externally exposed accessible part
V
Fig.1-1-9
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 Fig.1-1-10 and grounding specifications.
Chassis
Power cord primary wire
AC inlet
Exposed accessible part
Fig.1-1-8
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
Earth pin
Insulation Resistance (R)
R 1 M /500 V DC
R 10 M /500 V DC
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
1 M R 12 M /500 V DC
Dielectric Strength
Clearance Distance (d), (d')
AC 1 kV 1 minute d, d ' 3 mm
AC 1.5 kV 1 minute d, d ' 4 mm
AC 1 kV 1 minute
AC 3 kV 1 minute
(Class )
AC 1.5 kV 1 minute
(Class ) 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
Load Z Leakage Current (i) a, b, c AC Line Voltage Region
100 V
Japan i 1 mA rms Exposed accessible parts
1
0.15
110 to 130 V
USA & Canada i 0.5 mA rms Exposed accessible parts
1.5
110 to 130 V
220 to 240 V
Europe & Australia
2 i 0.7 mA peak i 2 mA dc i 0.7 mA peak i 2 mA dc
Antenna earth terminals
Other terminals
50
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.YF016)
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
2.1
DIFFERENCE LIST
The following table indicate main different points between models GR-SXM161US, GR-SXM256UC, GR-SXM260UC, GR-
SXM260US, GR-SXM265UC and GR-SXM265US.
MODEL
BUILT-IN LIGHT
BODY COLOR
CASSETTE ADAPTER
SECURITY TAG
GR-SXM161US GR-SXM256UC GR-SXM260UC GR-SXM260US GR-SXM265UC GR-SXM265US
YES NO YES YES YES YES
BLUE
NO
NO
SILVER
C-P7U
NO
SILVER
C-P7U
NO
SILVER
C-P7U
YES
BLUE
C-P7U
NO
BLUE
C-P7U
NO
(No.YF016)1-5
SECTION 3
DISASSEMBLY
3.1
BEFORE ASSEMBLY AND DISASSEMBLY
3.1.1
Precautions
• Be sure to disconnect the power supply unit prior to mounting and soldering of parts.
• Prior to removing a component part that needs to disconnect its connector(s) and its screw(s), first disconnect the wire(s) from the connector(s), and then remove the screw(s).
• When connecting/disconnecting wires, pay enough attention not to damage the connectors.
• When inserting the flat wire to the connector, pay attention to the direction of the flat wire.
• Be careful in removing the parts to which some spacer or shield is attached for reinforcement or insulation.
• When replacing chip parts (especially IC parts), first remove the solder completely to prevent peeling of the pattern.
• Tighten screws properly during the procedures. Unless specified otherwise, tighten screws at a torque of 0.118N
·
m
(1.2kgf
·
cm). However, 0.118N
·
m (1.2kgf
·
cm) is a value at the time of production. At the time of service, perform the procedure at a torque 10% less than 0.118N
·
m (1.2kgf
·
cm).
(See "SERVICE NOTE" as for tightening torque.)
3.1.2
Destination of connectors
Two kinds of double-arrows in connection tables respectively show kinds of connector/wires.
: Flat wire : Wire : Board to board (B-B)
: The connector of the side to remove
CONN. No.
CONNECTOR PIN No.
CN2a
CN2b
MAIN CN101
MAIN CN103
MONI/ BW CN761
MIC CN762
3.1.3
Disconnection of connectors (Wires)
40
2
Wire
Wire
FPC Connector
· Pull both ends of the connector in the arrow
direction, remove the lock and disconnect the flat
wire.
B-B Connector
Lock
FPC Connector
· Extend the locks in the direction of the arrow for
unlocking and then pull out the wire. After
removing the wire, immediately restore the locks
to their original positions because the locks are
apt to come off the connector.
B-B Connector
B-B Connector
· Pull the both ends of the board in the direction of the arrow, and remove the B-B Connector.
Fig.3-1-1
3.1.4
Tools required for disassembly and assembly
Torque driver
YTU94088
Bit
YTU94088-003
Tweezers
P-895
•
Torque driver
Be sure to use to fastening the mechanism and exterior parts because those parts must strictly be controlled for tightening torque.
•
Bit
This bit is slightly longer than those set in conventional torque drivers.
•
Tweezers
To be used for removing and installing parts and wires.
•
Chip IC replacement jig
To be used for replacement of IC.
•
Cleaning cloth
Recommended cleaning cloth to wipe down the video heads, mechanism (tape transport system), optical lens surface.
3.2
ASSEMBLY AND DISASSEMBLY OF MAIN PARTS
3.2.1
Assembly and disassembly
When reassembling, perform the step(s) in reverse order.
STEP
No.
[1]
[2]
[8]
PART
TOP COVER ASSY
UPPER ASSY
(Inc. VF ASSY,
SPEAKER/MONITOR)
VF ASSY
( 1) ( 2)
Fig.
No.
POINT
Fig.C1
S1,2(L1)
Fig.C2-1 S2a,2(S2b),3(S2c)
2(S2d),S2e,S2c
L2,CN2a,b
Fig.C2-2
2(S8),L8,CN8a
( 3) ( 4)
NOTE
-
-
NOTE 8a
NOTE 8b
( 5)
(
∗
1) Order of steps in Procedure
When reassembling, preform the step(s) in the reverseorder.
These numbers are also used as the identification (location)
No. of parts Figures.
(
∗
2) Part to be removed or installed.
(
∗
3) Fig. No. showing Procedure or Part Location.
C = CABINET
(
∗
4) Identification of part to be removed, unhooked, unlocked, released, unplugged, unclamped or unsoldered.
S = Screw
L = Lock, Release, Hook
SD = Solder
CN = Connector
[Example]
• 4 (S1a) = Remove 4 S1a screws.
• 3 (L1a) = Disengage 3 L1a hooks.
• 2 (SD1a) = Unsolder 2 SD1a points.
• CN1a = Remove a CN1a connector.
(
∗
5) Adjustment information for installation.
Chip IC replacement jig
PTS40844-2
Cleaning cloth
KSMM-01
1-6 (No.YF016)
Fig.3-1-2
3.2.2 ASSEMBLY/DISASSEMBLY OF CABINET PARTS AND ELECTRICAL PARTS
zDisassembly procedure zDestination of connectors
[9]
[10]
[11]
[6]
[7]
[8]
STEP
No.
[1]
[2]
[3]
[4]
[5]
PART NAME
Fig.
No.
Fig.C1
LOWER CASE ASSEMBLY
B/W VF ASSEMBLY
TOP OPE UNIT(S)
TOP OPE UNIT(M)
CASE COVER(S) ASSEMBLY
CASE COVER(M) ASSEMBLY
UPPER CASE(S) ASSEMBLY
UPPER CASE(M) ASSEMBLY
Inc. MONITOR ASSEMBLY
COVER (UPPER/M) ASSEMBLY
MONITOR ASSEMBLY
FRONT COVER ASSEMBLY
Inc. DC LIGHT,MIC
DC LIGHT ASSEMBLY
MIC
FRONT FRAME SA
Fig.C2
Fig.C3
Fig.C4
Fig.C5
POINT
8(S1),CN1a,b,c
3(S2)
CN3,(S3),(L3a),(L3b),2(L3d)
CN3,(S3),(L3a),(L3b),(L3c),2(L3d)
(S4),2(L4)
6(S5a),(S5b),(L5)
CN5,6(S5a),(S5b)
3(S6)
S7a,L7,SHEET(FPC),2(S7b)
CN8a,CN8b,(S8),L8a,L8b
2(L9)
S10
2(S11)
NOTE
-
-
-
NOTE 5
-
-
NOTE 7a,b,c,d
NOTE 8a,b
-
-
-
NOTE 5 :
Take care not to break or damage the FRAME.
NOTE 7a :
Take care not to cut the FPC wire.
NOTE 7b :
Insert and attach the SHEET(FPC) between the MONITOR
FPC and the UPPER CASE(M)ASSEMBLY.
CN.NO.
CN1a MAIN
CN1b MAIN
CN1c MAIN
CN3 MAIN
CN5 MAIN
CN8a MAIN
CN8b MAIN
CONNECTOR
CN27 SPEAKER
PIN
NO.
- 2
CN13
CN12
ZOOM - 14
B/W VF ASSEMBLY - 3
CN18 TOP OPE UNIT - 13
CN16 MONITOR ASSEMBLY CN7601 25
CN6 - 2
CN8 MIC - 2
NOTE 7c :
Attachment of the FPC
NOTE 7d :
For disassembly of the MONITOR ASSEMBLY, refer to 2.4
ASSEMBLY AND DISASSEMBLY OF [7]MONITOR AS-
SEMBLY (CABINET PARTS).
NOTE 8a :
Take care not to damage the OP BLOCK ASSEMBLY when and after the FRONT CASE ASSEMBLY is removed.
NOTE 8b :
Attachment of the WIRE
(No.YF016)1-7
1-8 (No.YF016)
[3]
L3c
L3d
L3b
L3a
6
7 8
D
F v
D
CN3 w
12
(S3)
E u G y z t
CN1a
CN1b x
CN1c
9 (S2)
10 (S2)
11 (S2) p
3
(S1)
F q r s1
G
E u t
6
(S1) x
[1]
v w
5
(S1) z
2
(S1)
1
(S1)
E s1 y
4
(S1)
7
(S1)
8
(S1) q p r
[2]
Fig.C1
OP BLOCK
ASSEMBLY
<S : SHOOTING MODEL>
[4]
aa
L4 aa
12
(S4)
Fig.C2
[4]
aa
<M : MONITOR MODEL>
24
(S7b)
25
(S7b)
[7]
<NOTE 7d>
<NOTE 5>
[5]
15
(S5a)
16
(S5a) k
<NOTE 5>
[5]
15
(S5a) l j
17
(S5a)
16
(S5a) h i j
17
(S5a) n
14
(S5a) m
<S : SHOOTING MODEL> g k n
18
14
(S5a)
(S5a) m g
(L5)
<M : MONITOR MODEL>
19
(S5b) m n
C k
18
(S5a) h i g
C
13
(S5a)
CN5 c d k j
Fig.C3
<MONITOR MODEL>
FPC
<NOTE 7a> f d
[6]
e
23
(S7a) f d c c
21
(S6)
20
(S6)
L7 e
<NOTE 7b>
SHEET(FPC)
22
(S6)
UPPER CASE(M)ASSEMBLY
AS FOR PUSH SW, DON'T BE
BROKEN AND DON'T FLOAT .
(SEE AND CHECK SW AFTER
ATTACHING FPC.)
Fig.C4
<NOTE 7c>
DO NOT MAKE FPC
SLACKEN IN THIS PART.
PROCESSED
THROUGH THIS PART.
INSTALL THE RAINFORCEMENT
BOARD WITH MONITOR OPENED .
( FOR THE DAMAGE PREVENTION
OF PUSH SWITCH .)
(No.YF016)1-9
0.118N
.
m (1.2kgf
.
cm)
28
(S11)
[11]
a
29
(S11) b b
26
(S8)
<NOTE 8a>
OP BLOCK ASSEMBLY
L8a a c
L8b c
A
A
B
CN8a
B
CN8b
SCREWING SEQUENCE
SHOULD BE IN ORDER
HERE FIRST AND OTHERS .
SHIELD
[8]
LIGHT WIRE
<NOTE 8b>
PASS THE WIRE
BETWEEN
THESE BOSSES.
MIC WIRE
DO NOT OBSTRUCT
THE RECEIVING
PART OF SENSOR
BY WIRE .
PASS THE WIRE
OUTSIDE OF
THIS BOSS .
SHIELD SHEET
SHOULD BE PUTTED SHIELD
PLATE BETWEEN FRAME TO MECHA .
27
(S10)
L9
[9]
[10]
Fig.C5
1-10 (No.YF016)
3.2.3 ASSEMBLY AND DISASSEMBLY OF CAMERA SECTION AND BOARD ASSEMBLY
zDisassembly procedure
CN1a
CN1b
CN1c
CN1d
CN1e
CN1f
CN1g
CN1h
CN1j
STEP
No.
[1]
PART
MAIN BOARD ASSEMBLY
[2]
[3]
[4]
Fig.
No.
POINT
OP BLOCK ASSEMBLY Fig.D2
2(S2)
CCD BOARD ASSEMBLY
Fig.D1
CN1a,b,c,d,e,f,g,h,SHIELD
2(S1),L1,CN1j
MECHANISM ASSEMBLY
Fig.D3
(S4a),(S4b),L4
SHIELD CASE(MAIN)
2(S4c),(S4d)
[5]
REAR BOARD ASSEMBLY
Fig.D4
2(S5)
NOTE
-
NOTE 3
NOTE 4
-
-
NOTE 3 :
For disassembly of the CCD BOARD ASSEMBLY, refer to
2.5 ASSEMBLY AND DISASSEMBLY OF [2]OP BLOCK
ASSEMBLY CCD BOARD ASSEMBLY (CAMERA SEC-
TION AND BOARD ASSEMBLY).
NOTE 4 :
When attaching the MECHANISM ASSEMBLY to S.CASE
(MAIN), pull out the FPC CABLE not to be inserted between the MECHANISM ASSEMBLY and S.CASE (MAIN).
zDestination of connectors
CONN.
No.
CONNECTOR Pin No.
MAIN CN15
MAIN CN4
MAIN CN1
MAIN CN5
MAIN CN2
MAIN CN3
MAIN CN7
MAIN CN22
MAIN CN28
OP BLOCK ASSEMBLY
-
LOADING MOTOR
DRUM MOTOR
HEAD(VIDEO,FLY.E)
-
-
-
SENSOR
CAPSTAN MOTOR
A/C HEAD
CCD
REAR UNIT
-
-
-
CN5301
-
14
18
11
24
2
10
11
14
10
(No.YF016)1-11
B2
J
C2
L1
CN1g
CN1h
CN1f
C2
J
B2
E2
[1]
A2
F2
D2
CN1a
G2
CN1j
A2
G2
CN1e
SHIELD
F2
E2
D2
CN1d
CN1b
CN1c
1
(S1)
2
(S1)
9
(S4d) c
7
(S4c)
<NOTE 4>
FRAME ASSEMBLY d
[4]
g e e c
8
(S4c) d g
G1
G2 f
L4
SHIELD
CASE
(MAIN)
5
(S4a)
6
(S4b)
Fig.D1
Fig.D3
4
(S2)
3
(S2) h j h j
[3]
<NOTE 3>
[2]
a b
[5]
10
(S5)
11
(S5) a b
FRAME
ASSEMBLY
Fig.D2
Fig.D4
1-12 (No.YF016)
3.2.4 ASSEMBLY AND DISASSEMBLY OF [7]MONITOR ASSEMBLY (CABINET PARTS)
zDisassembly of MONITOR ASSEMBLY
NOTE :
Be careful not to soil or scratch the monitor screen through the disassembly/assembly work.
(1) While removing the three screws 1 to 3 in numerical order and disengaging the two hooks (L7a and L7b) in alphabetical order, remove the MONITOR COVER
ASSEMBLY.
L7a
MONITOR COVER
ASSEMBLY
<NOTE 7b>
<NOTE 7b>
CN7a
4
(S7a)
<NOTE 7c>
SD7
B1
CN7b
NOTE 7a :
After removing the MONITOR COVER ASSEMBLY, be careful not to damage the FPC and the connector because the MONI. HINGE ASSEMBLY moves very easily.
(2) Unlock the connector 7a and then remove the FPC while lifting the MONI. HINGE ASSEMBLY upwards to remove it together with the FPC.
NOTE 7b :
When removing the FPC, unlock the connector first and then lift the MONI. HINGE ASSEMBLY upwards. Accordingly, the FPC is removed together with the MONI.HINGE ASSEMBLY.
(3) Unsolder the two soldered parts (SD7).
NOTE 7c :
When removing the MONITOR BOARD ASSEM-
BLY and the BACKLIGHT together, it is not necessary to unsolder the two soldered parts (SD7).
MONITOR BOARD
ASSEMBLY
D1
E1
C1
E1
B1
C1
L7b
F1
A1
1
(S7a)
<NOTE 7d>
BACK LIGHT
ASSEMBLY
DIFF SHEET
SHOULD PUT THIS
PART AT RIGHT SIDE .
LCD FRAME &
LCD MODULE
L7d
MONI. HINGE
ASSEMBLY
A1
NOTE 7d :
It depends on the inch size of the monitor assembly whether the backlight is supplied as an assembly or as separated parts.
In replacing the backlight assembly, see the Parts
List.
(4) Unlock the connector 7b, and disconnect the FPC from the connector 7b.
(5) Disconnect the FPC from MONITOR CASE ASSEM-
BLY.
(6) Remove the screw (4), and remove the MONITOR
BOARD ASSEMBLY while lifting the side of MONI-
TOR BOARD ASSEMBLY which has been attached with screw (4) upwards.
(7) Remove the BACKLIGHT and DIFF SHEET in this order.
(8) Remove the LCD FRAME&LCD MODULE while disengaging L7e and L7f at the both sides of MONITOR
CASE ASSEMBLY.
(9) Remove the S.CASE.
L7c
2
(S7b)
D1
L7e
L7f
3
(S7b)
F1
S.CASE
MONITOR CASE ASSEMBLY
Fig.3-2-1
(No.YF016)1-13
3.2.5
ASSEMBLY AND DISASSEMBLY OF [2]OP BLOCK ASSEMBLY
CCD BOARD ASSEMBLY (CAMERA SECTION AND BOARD ASSEMBLY)
zPrecautions
(1) Take care in handling the CCD IMAGE SENSOR, OP
LPF and lens components when performing maintenance etc., especially with regard to surface contamination, attached dust or scratching. If fingerprints are present on the surface they should be wiped away using either a silicon paper, clean chamois or the cleaning cloth.
(2) The CCD IMAGE SENSOR may have been shipped with a protective sheet attached to the transmitting glass.
When replacing the CCD IMAGE SENSOR, do not peel off this sheet from the new part until immediately before it is mounted in the OP BLOCK ASSEMBLY.
(3) The orientation of the OP LPF is an important factor for installation. If there is some marking on the OP LPF, be sure to note it down before removing and to reassemble it very carefully as it was referring to the marking.
zDisassembly of CCD BOARD ASSEMBLY and CCD BASE
ASSEMBLY
(1) Unsolder the CCD BOARD ASSEMBLY by the 14 points
(SD2) and then remove it.
(2) Remove the two screws (1, 2) and remove the CCD
BASE ASSEMBLY.
(3) Remove the SPACER.
(4) Remove the SHEET.
(5) Remove the OP LPF.
zAssembly of CCD BASE ASSEMBLY and CCD BOARD AS-
SEMBLY
(1) Set the OP LPF to the OP BLOCK ASSEMBLY so that the OP side touches the OP BLOCK ASSEMBLY.
NOTE 2a:
Pay careful attention to the orientation of the OP LPF.
(2) Set the SHEET to the OP LPF not to come off the right position.
(3) Attach the SPACER to the OP BLOCK ASSEMBLY.
(4) Fasten them together with the two screws (1, 2).
(5) Set the CCD BOARD ASSEMBLY in the CCD BASE AS-
SEMBLY, and then solder it by the 14 points (SD2).
zReplacement of service repair parts
The service repair parts for the OP BLOCK ASSEMBLY are as listed below.
Before replacement of these parts, remove the BRACKET (OP
BLOCK ASSEMBLY) as required.
Take special care not to disconnect any of the FPC wires or cause any damage due to soldering (excessive heating).
(1) FOCUS MOTOR
(2) ZOOM MOTOR
(3) IRIS MOTOR UNIT
NOTE 2b:
When replacing the FOCUS MOTOR or the ZOOM MO-
TOR, solder the FPC at a space of about 1 mm above the terminal pin.
NOTE 2c:
The IRIS MOTOR UNIT includes the FPC ASSEMBLY and two sensors.
1
(S2a)
8
(S2c)
7
(S2c)
9
(S2c)
11
(S2c)
IRIS MOTOR UNIT
<NOTE 2b, c>
<NOTE 2a>
OP LPF
Blue
10
(S2c)
OP side
6
5
(S2b)
(S2b)
FOCUS MOTOR
<NOTE 2b>
CCD side
(SD2)
2
(S2a)
CCD BAORD
ASSEMBLY
CCD BASE ASSEMBLY
SPACER
SENSOR
OP LPF
SHEET
3
(S2b)
4
(S2b)
0.078N
.
m (0.8kgf
.
0.118N
.
m (1.2kgf
.
cm) cm)
OP BLOCK
ZOOM MOTOR
<NOTE 2b>
Fig.3-2-2
1-14 (No.YF016)
SECTION 4
ADJUSTMENT
4.1
PREPARATION
4.1.1 Precaution
Camera system and deck system of this model are specially adjusted by using PC.
However, if parts such as the following are replaced, an adjustment is required. The adjustment must be performed in a
Service Center equipped with the concerned facilities.
• OP BLOCK ASSEMBLY
• EEP ROM (IC102 of MAIN board)
• MONITOR
In the event of malfunction with electrical circuits, first find a defective portion with the aid of proper test instruments as shown in the following electrical adjustment procedure, and then commence necessary repair/ replacement/adjustment.
• In observing chip TP, use IC clips, etc. to avoid any stress.
Prior to replacement of chip parts (especially IC), remove the solder completely to prevent peeling of the pattern.
• Use a patch cord if necessary. As for a patch cord, see the
BOARD INTERCONNECTIONS.
• Since connectors are fragile, carefully handle them in disconnecting and connecting the FPC.
4.1.2 REQUIRED TEST EQUIPMENT
• Personal computer (for Windows)
• Color TV monitor
• Oscilloscope (dual-trace type, observable 100MHz or higher frequency). The one observable 300 MHz or higher frequency is recommended.
• Digital voltmeter
• DC power supply or AC adapter
• Frequency counter (with threshold level adjuster)
4.1.3 TOOLS REQUIRED FOR ADJUSTMENT
Alignment tape
MHP-C
Alignment tape
MHP-LC
Cassette torque meter
PUJ50431-2
Roller driver
PTU94002-2
INF Adjustment Lens
YTU92001B
INF Adjustment Lens Holder
YTU94087
Light box Assembly
YTU93096A
Jig Connector Cable
YTU93082E
Cleaning Cloth
KSMM-01
Gray Scale Chart
YTU94133A
PC Cable
QAM0099-002
Conn. ring
YTU92001-111
Camera Stand
YTU93079
Color Bar Chart
YTU94133C
Communication Cable
YTU93107A
Service Support System
YTU94057-78
•
Alignment tape
To be used for check and adjustment of interchangeability of the mechanism.
(Video: Color bar signal, Audio: Non-signal)
•
Cassette torque meter
This is used to cheek the back tension and play torque during mechanism adjustment.
•
Roller driver
To be used to turn the Roller driver to adjustment of the linearity of playback envelope.
•
Cleaning Cloth
Recommended the Cleaning cloth to wipe down the video heads, mechanism (tape transport system), optical lens surface.
(No.YF016)1-15
•
Conn. ring
The connector ring to attach the INF lens to the head of the OP lens. For the usage of the Conn.ring.
•
INF Adjustment Lens
To be used for adjustment of the camera system. For the usage of the INF adjustment lens, refer to the Service Bulletin
No. YA-SB-10035.
•
INF Adjustment Lens Holder
To be used together with the Camera stand (11) for operating the Videocamera in the stripped-down condition such as the status without the exterior parts or for using commodities that are not yet conformable to the interchangeable ring. For the usage of the INF lens holder, refer to the Service Bulletin No.
YA-SB-10035.
•
Camera Stand
To be used together with the INF adjustment lens holder. For the usage of the Camera stand, refer to the Service Bulletin
No. YA-SB-10035.
•
Light box Assembly
To be used for adjustment of the camera system. For the usage of the Light box assembly, refer to the Service Bulletin No.
YA-SB-10035.
•
Gray Scale Chart
To be used for adjustment of the camera system. For the usage of the INF adjustment lens, refer to the Service Bulletin
No. YA-SB-10035.
•
Color Bar Chart
To be used for adjustment of the camera system. For the usage of the INF adjustment lens, refer to the Service Bulletin
No. YA-SB-10035.
•
Jig Connector Cable
To be connected to the Jig connector jack of the main board and used for measurement and adjustment.
•
PC Cable
To be used to connect the Videocamera and a personal computer with each other when a personal computer issued for adjustment.
•
Communication Cable
Connect the Communication cable between the PC cable and
Jig connector cable when performing a PC adjustment.
•
Service Support System
To be used for adjustment with a personal computer. Software can be downloaded also from JS-net.
4.2
JIG CONNECTOR CABLE CONNECTION
Connection procedure
JIG CONNECTOR
CABLE
JIG CONNECTOR COMMUNICATION CABLE
TO 8 PIN
( RXD )
TO 7 PIN
( TXD )
RED
WHITE
TO 6 OR 16 PIN
( GND )
BLACK
SERVICE SUPPORT SYSTEM
RS232C
COM PORT
CN25
MENU
COVER(JIG)
PC CABLE
PERSONAL COMPUTER
Jig connector diagrams
Fig.4-2-1
MAIN CN25
1
12
2
13
3
14
4
15
5
16
6
17
7
18
8
19
9
20
10
21
AL_J3.2V
MCU_RST
BWVFADJ
V_TP_FM
DIAL_PB
V_FF
DIAL_MN
EJECT_SW
JIGCN_SW
PB_CTL
GND
GND
TXD
V_OUT
RXD
AO_SIG_J
PLI_AD
V_OVL
VPP_7.8V
DISCHG_L
JIG CONNECTOR CABLE (YTU93082E)
JIG BOARD ASS'Y
(LABEL)
VPP 7.8V
MCU RST
JIG TX
GND
VF B OUT
VF R OUT
VF VCOM
RXD
TXD
VF G OUT
GND
V FF
V OVL
V TP FM
PB CTL
V OUT J
GND
AO SIG J
GND
AL_3.2V
6
8
16
18
7
17
5
15
21
10
20
9
19
13
2
12
4
14
3
1
MAIN-CN25
(LABEL)
DISCHG_L
VPP_7.8V
V_OVL
PLI_AD
AO_SIG_J
V_OUT
TXD
GND
GND
RXD
PB_CTL
JIGCN_SW
EJECT_SW
DIAL_MN
V_FF
DIAL_PB
V_TP_FM
BWVFADJ
MCU_RST
AL_J3.2V
Fig.4-2-2
1-16 (No.YF016)
4.3
MECHANISM COMPATIBILITY ADJUSTMENT
4.3.1 Tape transport adjustment
Mechanism adjustment is needed when DRUM ASSEMBLY or a part of the tape transport system is replaced. To protect tapes from damage, first clean the tape transport system, next confirm that nothing is wrong with the tape transport system by using a tape that can be disposed of, and then perform adjustment with alignment tape. Some exterior parts should be removed before some adjustment procedures, depending on the procedures.
BACK TENSION
0.97x10
-3
- 1.71x10
(10-17gf·cm)
-3
N
• m
PLAY TORQUE
1.47x10
-3
- 2.45x10
-3
N·m
(15-25gf·cm)
POLE BASE (SUP)
(GUIDE ROLLER)
TENSION
POLE
POLE BASE (TU)
(GUIDE ROLLER)
TU GUIDE
POLE
A/C HEAD
ASSEMBLY
PINCH
ROLLER
Fig.4-3-3
4.3.3 Tape pattern
Remove the exterior parts attached to the UPPER CASE
ASSEMBLY so that the guide roller beside the DRUM ASSEMBLY can be rotated.
• LOWER CASE ASSEMBLY
• TOP OPE UNIT
• CASE COVER(S),(M) ASSEMBLY
• UPPER CASE (S),(M) ASSEMBLY
NOTE:
In performing adjustment, it is recommended that LOWER
CASE ASSEMBLY and TOP OPE UNIT are attached to the main body for better operation and safety.
POLE BASE (TU)
(GUIDE ROLLER)
ALIGNMENT TAPE
Fig.4-3-1
4.3.2 Back tension
Remove the exterior parts attached to CASSETTE HOUSING
ASSEMBLY so that scales of CASSETTE TORQUE METER can be read.
• CASE COVER(S),(M) ASSEMBLY
• C. COVER INSIDE
CASSETTE TORQUE METER
Fig.4-3-2
(1) Set a cassette torque meter onto the deck and measure the back tension in standard PB mode to confirm that the back tension is 0.97x10
-3
- 1.71x10
-3
N•m.
(2) If not, replace the tension band.
When the value widely fluctuates in the measurement, replace the SUPPLY REEL DISK.
(3) With the CASSETTE TORQUE METER, confirm that the play torque is 1.47x10
-3
- 2.45x10
-3
N•m.
If necessary, replace the center pulley unit.
POLE BASE (SUP)
(GUIDE ROLLER)
JIG CONNECTOR CABLE
MAIN CN25 - JIG BOARD
12PIN(V_TP_FM)
13PIN(V_FF)
Fig.4-3-4
(1) Remove the Cover (JIG) shown on Fig.4-2-1.
(2) Connect the JIG CONNECTOR CABLE to CN25 on the
MAIN BOARD ASSEMBLY as shown on Fig. 4-2-2.
(3) Observe signal at V_TP_FM with external trigger from
V_FF on the JIG CONNECTOR CABLE.
(4) Playback the SP stairstep signal of the alignment tape and maximize the FM waveform by the tracking button.
(5) Set the tracking control to the center position by simultaneously pressing the tracking (-) and (+) buttons and maximize the FM waveform by the tracking button.
(6) If the observed FM waveform is not flat, adjust the height of the SUPPLY of TAKE-UP GUIDE ROLLER with the roller driver.
NOTE:
To prevent the tape from damage, turn the guide rollers slowly.
(No.YF016)1-17
(7) By operating the tracking button (both in + and - directions) in the manual tracking mode, vary the output level of the
FM waveform from maximum to minimum and vice versa to confirm that the waveform varies nearly in a flat shape.
(8) When the FM waveform breaks in the level varying process, subtly adjust the height of guide rollers at every breaking point so that the waveform varies as flat as possible.
Repeat the above steps 6. and 7. several times to confirm that the waveform is flat as a whole.
(9) Playback the SP stairstep signal of alighment tape and adjust the tracking control to maximize the FM waveform, confirm that FM waveform variation is always flat.
(10) Record the signal and play it back in both of the SP and EP modes, and confirm that the FM waveform is flat in both modes.
NOTE:
Among the above-mentioned adjustment steps, the items of No.9 and No.10 are needed for the EP model only.
CH-2
1 field
FLATTEN WAVEFORM.
4.3.4
A/C head height & azimuth
Remove the exterior parts attached to the UPPER CASE
ASSEMBLY so that the screws around the A/C HEAD
ASSEMBLY can be tighten or loosen.
• LOWER CASE ASSEMBLY
• TOP OPE UNIT
• CASE COVER(S),(M) ASSEMBLY
• UPPER CASE (S),(M) ASSEMBLY
• FRONT FRAME ASSEMBLY
NOTE:
In performing adjustment, it is recommended that LOWER
CASE ASSEMBLY and TOP OPE UNIT are attached to the main body for better operation and safety.
(1) Remove the Cover (JIG) shown on Fig.4-2-1.
(2) Connect the JIG CONNECTOR CABLE to CN25 on the
MAIN BOARD ASSEMBLY.
(3) Connect the channel-1 scope probe to the audio output
(AO_SIG_J) and connect the channel-2 scope probe to PB
CTL.
(4) Playback the alignment tape.
(5) Set the tracking to its center range by pressing the (+) and
(-) tracking controls simultaneously.
(6) Adjust screws A , B and C approximately 45 degrees in the same direction to obtain maximum audio output and CTL signal levels.
(7) As a final fine adjustment, adjust screw B for minimum signal level fluctuation and screw C for maximum output signal level.
CAUSER BY WRONG HEIGHT
OF SUPPLY GUIDE ROLLER
CAUSED BY WRONG HEIGHT
OF TAKE-UP GUIDE ROLLER
Fig.4-3-5
A/C HEAD
SCREW C
CORRECT VARIATION OF WAVEFORM
BAD VARIATION OF WAVEFORM
SCREW A
SCREW B
Fig.4-3-6
(11) Through the above steps, confirm that there occur no wrinkling and damage in the tape around the PINCH ROLLER and TU GUIDE POLE whenever the deck is in operation of
Loading/Unloading, Search Rewind and at mode change from Search Rewind to play mode. If wrinkling or damage in the tape occurs around the TU GUIDE POLE, adjust the angle (slant) of the A/C HEAD to the tape. So that the tape normally runs along the lower flange of the GUIDE POLE.
Fig.4-3-7
Audio signal
Control pulse signal
Fig.4-3-8
1-18 (No.YF016)
4.3.5 Phase of control head (X value)
Note:
Remove the exterior parts attached to the UPPER CASE
ASSEMBLY so that the screws around the A/C HEAD
ASSEMBLY can be tighten or loosen.
(1) Connect the JIG CONNECTOR CABLE to CN25 on the
MAIN BOARD ASSEMBLY.
(2) Playback the SP stairstep signal of the alignment tape and observe signal at V_TP_FM with external trigger from
V_FF on the JIG CONNECTOR CABLE.
(3) Operate the tracking button in the center and manual tracking mode by pressing the tracking (+) and (-) buttons and confirm that the FM output level is maximum at the center position as shown in Fig. 3-3-9.
(4) If necessary, slightly loosen the setscrews D and E and insert the Tweezers into the notch and guide hole to move the A/C HEAD fully in the direction of the capstan to the extent.
(5) Gradually move the A/C HEAD toward the drum to find the position where the FM output level maximum for the first time (a’ - b’ in Fig. 3-3-9).
(6) Fine adjust the phase of the A/C HEAD and tighten the screws D and E at the point a.
A/C HEAD
INSERT THE
TWEEZERS
4.4
ELECTRICAL ADJUSTMENT
Electrical adjustment is performed by using a personal computer and software for SERVICE SUPPORT SYSTEM. Read RE-
ADME.TXT file to use the software properly.
As for the connection of cables, see "4.2 JIG CONNECTOR
CABLE CONNECTION".
4.4.1 B/W VF ASSEMBLY (E. VF) ADJUSTMENT
Referring to “SEC. 3 DISASSEMBLY” and connect the E. VF
WIRE to CN12 of the MAIN BOARD ASSEMBLY.
(LY20701)
BOTTOM CASE ASSEMBLY
SERIAL NO. LABEL
PARTS NO.
LY20701
Fig.3-4-2
SCREW
NOTE:
• Unless otherwise specified, all measurement points and adjustment parts are located on E. VF BOARD ASSEMBLY.
• After adjustment or replacement of the deflection yoke or the centering magnet, fix it by the band as shown the figure below.
TOP VIEW
CRT
CENTERING
MAGNET
STOPPER
SCREW D
Fig.3-3-8
A
ADJUSTING
POINT B
SCREW E
MAX
FM OUTPUT
DIRECTION OF CAPSTAN
A/C HEAD PHASE
Fig.3-3-9
ZERO
DIRECTION OF DRUM
Fig. 3-4-3
• After adjustment is completed, compare the picture on the E.
VF screen with the monitor TV.
CRT
CENTERING
MAGNET
STOPPER
F.B.T
Fig. 3-4-4
CN7002
VR7001
V. SIZE
VR7003
FOCUS
VR7002
BRIGHT
CN7001
Fig. 3-4-5
T7001
(No.YF016)1-19
4.4.1.1 Tilt
Subject
Mode
Equipment
• Alignment tape
• Stairstep
• PB
• E. VF
Measurement point • E. VF screen
Adjusting part • Deflection yoke
Specification • The picture is visible as same as monitor TV.
(1) Put the deflection yoke to the most inner side of CRT neck first. Then fix the stopper temporary.
(2) Adjust the tilt of picture on the E. VF screen by tilting the deflection yoke.
(3) Fix the stopper completely.
4.4.1.2 Centering
Subject
Mode
Equipment
• Alignment tape
• Stairstep
• PB
• E. VF
Measurement point • E. VF screen
Adjusting part • Centering magnet
(CRT BOARD ASSEMBLY)
Specification • The center of the E. VF screen
(1) While observing the viewfinder screen, adjust the centering magnet to locate the stairstep in the center of the view-finder screen.
4.4.1.3 Vertical scanning
Subject
Mode
• Camera picture
• EE
Equipment • E. VF
Measurement point • E. VF screen
Adjusting part
Specification
• VR7001 (V. SIZE)
• Normal picture amplitude
(1) Observing the viewfinder screen, adjust VR7001 for normal picture amplitude.
4.4.1.4 Brightness
Subject
Mode
• -
• EE
• Lens closed
Equipment • E. VF
Measurement point • E. VF screen
Adjusting part
Specification
• VR7002 (BRIGHT)
• The CRT raster is just barely visible
(1) Close the lens with the cap and adjust VR7002 so that the raster of the CRT is just visible in the E. VF.
4.4.1.5 Focus
Subject
Mode
• Camera picture
• EE
Equipment • E. VF
Measurement point • E. VF screen
Adjusting part
Specification
• VR7003 (FOCUS)
• The center area is clear and defined
(1) While observing the viewfinder screen, adjust VR7003 so that the picture at the central area of the screen is clear and defined.
1-20 (No.YF016)
5.1
SERVICE NOTE
SECTION 5
TROUBLESHOOTING
(No.YF016)1-21
5.2 TAKE OUT CASSETTE TAPE
In the event that the set enters the emergency mode as it is loaded with a cassette tape and the cassette tape cannot be ejected with the EJECT button, manually, take it out of the set according to the following procedure.
NOTE :
• If the mechanism comes into the unloading mode as the cassette tape is not held by hand, it results in tape damage.
(1) Disconnect the set from the power source.
(2) Remove the LOWER CASE ASSEMBLY and TOP OPE
UNIT (see Fig.C1, page 8).
(3) Connect a jumper wire to each pole of the LOADING
MOTOR as shown by the magnified view (Fig. 5-2-1).
(4) While holding down the cassette housing by hand, connect the jumper wires to a battery to run the mechanism to the EJECT position four unloading. If this unloading operation is performed as the cassette housing is not held down by hand, the front lid of the cassette may damage the tape when it is ejected.
(5) For taking in the slack of the tape, run the mechanism to the EJECT position as the front lid of the cassette is left open, and turn the TAKE-UP GEAR in the forward direction to wind up the tape. After confirming that the tape has completely been wound up and the supply reel is idling, take the cassette tape out of the cassette housing.
BATTERY
(DC1.5V)
MAGNIFIED VIEW b
TAKE-UP GEAR
Fig.5-2-1
1-22 (No.YF016)
5.3 EMERGENCY DISPLAY
Whenever some abnormal signal is input to the mechacon CPU, an error number (E01, as an example) is displayed in the electronic view finder. In every error status, such the message as shown below alternately appear over and over.
• In an emergency mode, all operations except turning on/off the
POWER switch are ineffectual.
Example (in case of the error number E01):
E01
UNIT IN
SAFEGUARD MODE
E01
REMOVE AND
REATTACH BATTERY
E. VF
E07 Short circuit of capstan MDA
E06 CAPSTAN FG input absent
Symptom
E04 DRUM FG input absent
E03 SUPPLY REEL FG input absent
E02 Mode control motor rotates for more than 6 sec UNLOADING without shift to next mode.
E01 Mode control motor rotates for more than 6 sec LOADING without shift to next mode.
E00 Overtime the programming transaction
Mode when observed
Power ON
CAPSTAN rotation
DRUM rotation
REC, PLAY, SEARCH, FF/REW
UNLOADING
LOADING
REC, PLAY
(NTSC)
(No.YF016)1-23
JVC SERVICE & ENGINEERING COMPANY OF AMERICA
DIVISION OF JVC AMERICAS CORP.
www.jvcservice.com(US Only)
JVC CANADA INC.
Head office : 21 Finchdene Square Scarborough, Ontario M1X 1A7 (416)293-1311
(No.YF016)
Printed in Japan
WPC
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