Disassembly; Before Assembly And Disassembly; Precautions; Assembly And Disassembly - JVC GC-QX3U Service Manual

1.1 BEFORE ASSEMBLY AND DISASSEMBLY

1.1.1 Precautions

1. Be sure to remove the power supply unit prior to mount-
ing and soldering of parts.
2. When connecting and disconnecting the connectors, be
careful not to damage the wire.
3. When replacing chip parts (especially IC parts), desolder
completely first (to prevent peeling of the pattern).
4. Tighten screws properly during the procedures.
Unless specified otherwise, tighten screws at a torque
of 0.1N•m (1.0 kgf•cm).
CAUTION!!
RISK OF ELECTRIC SHOCK
When disassembling the unit, electric hazards may
occur in some cases if the capacitor for strobe
emission (STROBE board C6512) has been charged.
Therefore be also very careful when performing repairs
and inspections.
It is recommended that operations be carried out after
waiting for more than ten minutes with the power
supply removed or after discharging the capacitor
forcibly.
Discharge the capacitor according to <NOTE 2> on
Page 1-3.
C6512 is located behind the STROBE board.
PRECAUTIONS ON HANDLING
THE LITHIUM SECONDARY BATTERY
This unit is equipped with a coin type lithium secondary
battery.
Improper handling of this battery may cause heat to
be generated, damage, fires, or leakage. Always follow
the precautions below.
Do not short-circuit, disassemble, distort, nor heat
1
the battery.
Load the battery with its + and - poles connected
2
correctly.
Do not solder the battery itself.
3
When replacing parts, also refer to the numbers
4
listed in the Parts List of the manual.
Do not store the battery in direct sunlight and hot
5
and humid places.
When replacing the battery, handle it with care and
6
do not attempt to hold it with tweezers as it may
short-circuit.
When disposing the battery, wind tape around the
7
terminal to insulate the battery, and dispose the
battery according to the method prescribed.
SECTION 1

DISASSEMBLY

1.1.2 Assembly and disassembly

STEP
PART NAME
1 FRONT CASE
REAR CASE
2 OPERATION UNIT
(1) (2)
(1) : Indicate the disassembly steps. When assembling,
perform in the reverse order of these steps. This
number corresponds to the number in the disassem-
bly diagram.
(2) : Indicates the name of disassembly/assembly parts.
(3) : Indicates the number in the disassembly diagram.
(4) : Indicates parts and points such as screws, washers,
springs which must be removed during disassembly/
assembly.
Lock (L), soldering (SD), shield, connector, etc.
Note: The encircled numbers indicate the order for disas-
sembling the cabinet parts.
The screw numbers indicate the disassembling order.
:Wire
:Flat wire
:Board to Bord Connector
[Example]
• (115) = Remove the parts No 115 screw.
• (SD1) = Desoldering at the point SD1.
• a = Disconnect the connector/ML a .
(5) : Precautions on disassembly/assembly.
FIG.
POINT
NO.
Remove screws
2(115), 3(156), 4(114), 1(116)
Fig
1-2-1
Remove the Connector Remove screws
r MAIN CN4001 OPERATION UNIT 3 (116)
Remove the TOP COVER 2 (115)
(3) (4)
NOTE
NOTE 1
(5)
1-1