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ADJUSTMENT
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SECTION> 5. MW Tracking Adjustment (HR) Settings : Test point : TP6(Lch), TP7(Rch) Adjustment location : L981(l/3) ........................................ 603kHz TC941 ........................................... 1404kHz
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1. Clock Frequency Check Settings : q Test point: TP2 (CLK) Method: Set to AM 1710kHz(U,LH,HA),MW1602kHz(HR) and check that the test point is 2160kHz f 45 Hz(U,LH,HA), 2052kHz * 45 Hz(HR). 2. AM VT Check (U,LH,HA) Settings : q Test point: TP1 (VT) Method : Set to AM 1710kHz and AM 530kHz and check that the test point is less than8.5V(1710kHz) and more than 0.6V(530kHz).
Method : Setup TC941 to center before adjustment. The level at 603kHz is adjust to max. by L981(l/3). Then the level at 14041cHz is adjust to max. by TC941. 6. SW VT Adjustment (HR) Settings : q Test point: TP1 (VT) Adjustment location : L942 q Method : Set to SW 17.9MHz and adjust L942 so that the test point becomes 7.OV ~ 0.05V. Then set to SW 5.9MHz and check that the test point is more than 0.3V. 7. SW Tracking Adjustment (HR) Settings : q Test point: TP6(Lch), TP7(Rch) Adjustment location : q L941 ............................................... 5,9MHZ TC943 .......................................... 17.9MHz Method: Set up TC943 to center before adjustment. The level at 5.9MHz is adjust to max. by L941. Then the level at 17.9MHz is adjust to max. by TC943.
3. MW VT Adjustment (HR) Settings : q Test point: TP1(VT) q Adjustment location : L981 (3/3) Method: Set to MW 1710kHz and adjust L981(3/3) so that the test point becomes 8.OV + 0.05V. Then set to MW 530kHz and check that the test point is more than 0,3V. 4. AM Tracking Adjustment (U,LH,HA) Settings : q Test point: TP6(Lch), TP7(Rch) q Adjustment location : L981(l/3) ................................ loookHZ(u) L981(l/3) ......................... 999kHz(LH,HA) Method : Set to AM 1000kHz(U),999kHz(LH,HA) and adjust L98 1(1/3) so that the test point is max.
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