Pioneer AVX-P7700WES Service Manual page 70

AVX-P7700W
- Removing the Shield Case B
1. Free the front engagements at three places and right-
hand side engagements at two places.
2. Using the left-hand side engagement as the fulcrum,
turn the shielding case around rightward to remove
it. When the shielding case does not come off
smoothly, push the frame claw located in the center
and the structure of the case at the engaging section
toward the counter-clockwise direction. Furthermore,
pushing the structure of the case at the engagement
with the frame of the case at two places downward
will facilitate separation of the case.
Shield Case B
- Removing the Shield Case F
1. Remove the shielding case "F" toward the opposite
side to the X-TAB.
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- Removing the Y-TAB
1. Raise the reinforcement land section.
2. Raise the soldered section located in the center.
When doing this, since the folded TAB tends to
jump up, hold the Y-TAB using a pair of tweezers.
3. After freeing the TAB, check and make sure the TAB
lead is not cut using a magnifying glass.
Tweezers
- Precautions
1. Since the TAB can be cut very easily, pay great atten-
tion when handling it.
2. Always provide a marking (dot) to represent the num-
ber of times the TAB is removed.
3. The TAB should only be removed up to three times.
4. When releasing the part from the soldered state,
always use a blower (HS-550 with
tip-end shape HS553, manufac-
tured by HOZAN).
- Install the Y-TAB
1. Supplement the solder by applying flux to the solder
land on the PCB side.
2. Since the rear side of the TAB lead tends to form a
Shield Case F
square hole after the TAB has been removed,
smooth out the solder using a soldering iron.
3. Solder the reinforcement lands on both sides.
4. Solder all over the central area.
Precautions
1. Use a soldering iron with a pencil-shaped head.
2. Maintain the temperature of the soldering iron at
around 320 degrees C .
PCB
Y-TAB
TAB lead
Base film
Solder resist
TAB potting