GAI-Tronics 12250-002 Volume Level Control Receiver Assembly (120 V ac) - Manual (Page 3)

Pub. 42003-203B
M ODEL 12250-002 V OLUME L EVEL C ONTROL R ECEIVER A SS ’ Y (120 V AC ) R EPLACEMENT K IT Page 3 of 7
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Figure 2. VLC PCBA Component Location
Disassembly
1. Loosen the four front panel screws, and remove the amplifier from the enclosure.
2. Loosen the four screws on the side, and slide the chassis to remove the front panel. If the unit does
not contain a handset, immediately set the front panel aside.
3. If the unit contains a handset, disconnect the wires at the printed circuit board assembly (PCBA), and
set the front panel aside. Note the wire color and location prior to removal to allow for easier re-
assembly.
N OTE : Skip Step 4 if the amplifier does not have a chassis-mounted transformer.
4. Place the chassis on the bench with the connector toward you. Disconnect the transformer by
removing the two mounting screws. Disconnect the 6-pin Molex connector from the PCBA, and set
it aside.
N OTE : On Models 701-204, 701-205, and 701-304 also disconnect the two 6-pin Molex connectors
from the PCBAs associated with the auxiliary handset jack. Make note of the connector(s) position
when removing them, as the connector(s) will be reinstalled later. Remember to save the parts.
CAUTION
Removal of the PCBA before drilling is advisable.
5. Loosen the two screws holding the amphenol connector to the chassis. If the amplifier contains a
small PCBA (Model 69072-001) mounted to the chassis, detach this by removing the four screws,
and set them aside. Note the board’s orientation.
6. Using pliers, press the plastic standoffs through the back of the chassis to remove the PCBA. Set the
PCBA aside. Be careful not to break the standoffs when pushing them through.