— 2 —
1. Check theareaof yourrepair forunsoldered orpoorly-soldered
connections. Checkthe entire board surfacefor solder splashes
and bridges.
2. Check the interboard wiring to ensure that no wires are
"pinched" or contact high-wattage resistors.
3. Look for unauthorized replacement parts, particularly
transistors, that were installed during a previous repair. Point
them out to the customer and recommend their replacement.
4. Look for partswhich, through functioning, show obvious signs
of deterioration. Point them out to the customer and
recommend their replacement.
5. Check the B+ voltage to see it is at the values specified.
6. Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270˚C
during repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.
Unleaded solder
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size.)
: LEAD FREE MARK
Unleaded solder has the following characteristics.
•Unleaded solder melts at a temperature about 40°C higher than
ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350°C.
Caution: The printed pattern (copper foil) may peel away if the
heated tip is applied for too long, so be careful!
•Strong viscosity
Unleaded solder is more viscous (sticky, less prone to flow) than
ordinary solder so use caution not to let solder bridges occur such
as on IC pins, etc.
•Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.
SAFETY CHECK-OUT
After correcting the original service problem, perform the following
safety checks before releasing the set to the customer.
DCR-PC115/PC115E/PC120BT/PC120E
TABLE OF CONTENTS
4. PRINTEDWIRING BOARDS AND
SCHEMATIC DIAGRAMS
4-2. PRINTED WIRING BOARDS AND
SCHEMATIC DIAGRAMS ··········································4-19
•VC-270 (CAMERA PROCESS, DIGITAL STILL
PROCESS, DV PROCESS, AUDIO/VIDEO PROCESS,
HI CONTROL, MECHA CONTROL, DC/DC
CONVERTER)
PRINTED WIRING BOARD ·······················4-19
•VC-270 (CAMERA A/D CONVERTER, SHUTTER
CONTROL)(1/18)
SCHEMATIC DIAGRAM ····························4-23
•VC-270 (CAMERA SIGNAL PROCESSOR)(2/18)
SCHEMATIC DIAGRAM ····························4-25
•VC-270 (CAMERA SIGNAL PROCESSOR)(3/18)
SCHEMATIC DIAGRAM ····························4-27
•VC-270 (DIGITAL STILL PROCESS)(4/18)
SCHEMATIC DIAGRAM ····························4-29
•VC-270 (64M/16MBIT SDRAM, 32M/4MBIT
FLASH)(5/18)
SCHEMATIC DIAGRAM ····························4-31
•VC-270 (DV PROCESSOR)(6/18)
SCHEMATIC DIAGRAM ····························4-33
•VC-270 (DV INTERFACE)(7/18)
SCHEMATIC DIAGRAM ····························4-35
•VC-270 (REC/PB HEAD AMP)(8/18)
SCHEMATIC DIAGRAM ····························4-37
•VC-270 (VIDEO I/O)(9/18)
SCHEMATIC DIAGRAM ····························4-39
•VC-270 (VIDEO A/D CONVERTER)(10/18)
SCHEMATIC DIAGRAM ····························4-41
•VC-270 (CAMERA CONTROL)(11/18)
SCHEMATIC DIAGRAM ····························4-43
•VC-270 (FOCUS/ZOOM MOTOR DRIVE)(12/18)
SCHEMATIC DIAGRAM ····························4-45
•VC-270 (HI CONTROL)(13/18)
SCHEMATIC DIAGRAM ····························4-47
•VC-270 (MECHANISM CONTROL)(14/18)
SCHEMATIC DIAGRAM ····························4-49
•VC-270 (DRUM/CAPSTAN MOTOR DRIVE)(15/18)
SCHEMATIC DIAGRAM ····························4-51
•VC-270 (AUDIO PROCESS)(16/18)
SCHEMATIC DIAGRAM ····························4-53
•VC-270 (CONNECTOR)(17/18)
SCHEMATIC DIAGRAM ····························4-55
•VC-270 (DC/DC CONVERTER)(18/18)
SCHEMATIC DIAGRAM ····························4-57
4-3. WAVEFORMS ······························································4-92
4-4. MOUNTED PARTS LOCATION ·································4-93
6. REPAIR PARTS LIST
6-2. ELECTRICAL PARTS LIST ········································6-14
