MODELS: SPR4232, SPR4212,
HPR4252, HPR4262,
HPR4272, HPR5012,
HPR5052, HPR5072,
HPR6372
Chassis STRAUSS / SCHUBERT
SUBJECT: No audio. There is a mandatory service mode adjustment after
changing the Main PCB.
SYMPTOM: After changing the Main PCB the unit now has no audio.
REPAIR: Adjust two settings in service mode after replacing the Main board to
restore sound.
PROCEDURE: In service mode under the OPTION BYTE sub menu, select and
adjust parameters MST3385 and STA323.
