Specific Service Instructions; Before Assembly And Disassembly - JVC GR-D30UB Service Manual

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
0.088N•m (0.9kgf•cm).
2.1.2 Assembly and disassembly
[Example]
STEP
PART
No.
[1]
TOP COVER ASSEMBLY Fig.C1
[2]
Fig.C2-1
UPPER ASSEMBLY
(Inc. VF ASSEMBLY,
SPEAKER/MONITOR)
[8]
VF ASSEMBLY Fig.C2-2
(1) (2)
(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.
C = CABINET
D = CAMERA AND BOARD ASSEMBLY
(4) Identification of part to be removed, unhooked, unlocked,
released, unplugged, unclamped or unsoldered.
P = Spring
W = Washer
S = Screw
* = Unhook, unlock, release, unplug or unsolder.
2(S3) = 2 Screws (S3)
CN = Connector
(5) Adjustment information for installation.
2.1.3 Destination of connectors
Two kinds of double-arrows in connection tables respectively
show kinds of connector/wires.
: Flat wire
: Wire
[Example]
CONN.
CONNECTOR
No.
CN2a MAIN CN101
CN2b MAIN CN103
Remove the parts marked in

SPECIFIC SERVICE INSTRUCTIONS

Fig.
POINT NOTE
No.
S1,2(L1)
S2a,2(S2b),3(S2c)
2(S2d),S2e,S2c
L2,CN2a,b
2(S8),L8,CN8a NOTE 8a
NOTE 8b
(3) (4)
Pin No.
MONI BW CN761
MINI BW CN762
.
SECTION 2
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.
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.
-
-
(5)
2.1.5 Tools required for disassembly and assembly
Torque driver
1
YTU94088
Tweezers
3
P-895
Cleaning cloth
5
KSMM-01
40
10
Flat wire
Connector
Fig.2-1-1
Flat wire
Connector
Fig.2-1-2
Bit
2
YTU94088-003
Chip IC replacement jig
4
PTS40844-2
Fig.2-1-3
(No.86722)1-5