Sustain Drive (Ss) Board Isolation (Explanation) - Panasonic TH-42PX80U Service Manual

Sustain Drive (SS) Board Isolation
To determine if the Sustain board is defective, it might be necessary to
disconnect it from its power source (P board) and its sustain drive pulses
source (D board).
To do this, remove connectors SS11 (VSUS), SS33 or C23 (P+5V and
sustain pulses), and SS34 (Jumper) from the Sustain Drive board (SS).
Remove connector P12 (P+15V) from the Power Supply (P board).
Place the connector removed from SS34 across pins 8 and 10 of
connector P12.
Note 1: Connector SS34 is much smaller than connector P12 but it fits
ok when it's installed across pins 8 and 10 of connector P12.
Note 2: In order to get to SS33 and SS34, it might be necessary to
remove the Side Terminal Unit assembly. Remove 3 screws to
remove Side Terminal Unit assembly.
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