JVC GR-SXM250US, Service Manual

Page: 5 / 75

(No.86721)1-5
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
2.1 BEFORE ASSEMBLY AND DISASSEMBLY
2.1.1 Precautions
1. Be sure to disconnect the power supply unit prior to mount-
ing and soldering of parts.
2. 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).
3. When connecting/disconnecting wires, pay enough atten-
tion not to damage the connectors.
4. Be careful in removing or handling the part to which some
spacer or shield is attached for reinforcement or insulation.
5. When replacing chip parts (especially IC parts), first remove
the solder completely to prevent peeling of the pattern.
6. Tighten screws properly during the procedures. Unless
specified otherwise, tighten screws at a torque of
0.196N•m (2.0kgf•cm).
2.1.2 Assembly and disassembly
(1) Order of steps in Procedure
When reassembling, preform the step(s) in the reverse
order. 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.
(4) Identification of part to be removed, unhooked, unlocked,
released, unplugged, unclamped or unsoldered.
(5) Adjustment information for installation.
2.1.3 Destination of connectors
2.1.4 Disconnection of connectors (Wires)
Pull both ends of the connector in the arrow direction, remove the
lock and disconnect the flat wire.
Fig.2-1-1
Extend the locks in the direction of the arrow for unlocking and
then pull out the wire. After removing the wire, immediately re-
store the locks to their original positions because the locks are
apt to come off the connector.
Fig.2-1-2
2.1.5 Tools required for disassembly and assembly
Fig.2-1-3
1.Torque driver
Be sure to use to fastening the mechanism and exterior parts
because those parts must strictly be controlled for tightening
torque.
2.Bit
This bit is slightly longer than those set in conventional torque
drivers.
3.Cleaning cloth
Recommended cleaning cloth to wipe down the video heads,
mechanism (tape transport system), optical lens surface.
C = CABINET
D = CAMERA AND BOARD ASSEMBLY
P = Spring
W = Washer
S = Screw
* = Unhook, unlock, release, unplug or unsolder.
2(S3) = 2 Screws (S3)
CN = Connector
LOWER CASE ASSEMBLY
B/W VF ASSEMBLY
TOP OPE UNIT
CASE COVER(S) ASSEMBLY
CASE COVER(M) ASSEMBLY
Fig.C1
Fig.C2
8(S1),CN1a,b,c
3(S2)
CN3,L3a,2(L3b)
(S4),2(L4)
-
-
-
-
[1]
[2]
[3]
[4]
STEP
No.
PART
NOTE
Fig.
No.
POINT
(4) (5) (2) (3) (1)
[Example]
CN1a MAIN CN27 2
CONN.
No.
Pin No. CONNECTOR
Remove the parts marked in .
[Example]
Two kinds of double-arrows in connection tables respectively
show kinds of connector/wires.
: Flat wire
: Wire
- SPEAKER
Connector
Flat wire
Connector
Flat wire
Torque driver
YTU94088
1
2
Bit
YTU94088-003
3
Cleaning cloth
KSMM-01