
PINPOINT TEST A: THE AUDIO UNIT IS INOPERATIVE/DOES NOT
A1: CHECK THE OPERATION OF THE AUDIO UNIT ............................
A2: CHECK FOR SOUND FROM THE SPEAKERS................................
A3: CHECK BATTERY SUPPLY FUSE...................................................
A4: CHECK THE ACCESSORY SUPPLY FUSE .....................................
A5: CHECK CIRCUIT 29-MD15/74-MD15 AUDIO UNIT SUPPLY ...........
A6: CHECK CIRCUIT 91-MD15 AUDIO CONTROL UNIT GROUND.......
A7: CHECK CIRCUIT 29 MD15/74-MD15 FOR CONTINUITY ................
A8: CHECK CIRCUIT 29-MD15/74-MD15 FOR SHORT..........................
A9: CHECK THE RADIO RECEIVER, CASSETTE PLAYER FOR
CORRECT OPERATION ........................................................................
PINPOINT TEST B: POOR RECEPTION
B1: CHECK THE ANTENNA RECEPTION..............................................
B2: CHECK THE ANTENNA GROUND...................................................
B3: CHECK THE ANTENNA CORE RESISTANCE.................................
B4: CHECK THE ANTENNA BASE CONNECTOR RESISTANCE ..........
B5: CHECK THE ANTENNA CORE FOR SHORT ..................................
B6: CHECK THE ANTENNA CABLE FOR SHORT ................................
PINPOINT TEST C: DISTORTED SOUND FROM ONE OR
C1: CHECK THE AUDIO CONTROL OF THE SPEAKER (S) ................
C2: CHECK THE SPEAKER CIRCUIT RESISTANCE.............................
C3: CHECK THE RESISTANCE OF THE SPEAKER ..............................
C4: CHECK THE SPEAKER CIRCUIT CONTINUITY..............................
PINPOINT TEST D: NO SOUND FROM ALL OF THE SPEAKERS
D1: CHECK THE ELECTRICAL CONNECTORS TO THE AUDIO UNIT .
D2: CHECK THE SPEAK OSITIVE CIRCUIT FOR
SHORT TO GROUND.............................................................................
D3: CHECK THE SPEAKER NEGATIVE CIRCUIT FOR
SHORT TO GROUND.............................................................................