ADJUSTMENT PROCEDURE
SKW-530 : POWERED SUBWOOFER /
ADJUSTMENT OF IDLING CURRENT
SKS-HT530
R544
P502A
Q517
R543
R533
Q515
C502
R527
C514
J324
Q952
Q541
Q516
R522
R521
J323
R513
R511
J344
J331
R516
R515
R507
R504
R510
C503
R651
R503
R509
R501
R502
C504
C952
C954
C951
R517
R542
R541
Q510
Q506
Q507
R514
R512
R508
C526
C517
Q504
C506
Q505
Q509
Q503
C505
J309
Q502
Q501
R505
R506
C501
C519
C520
J313
J345
C906
C906
C905
C905
NCAF-8275
1
25138275B
P531
R531
J322
J308
R534
C527
C903
C904
J337
Q518
Q519
C528
J305
J310
J304
J311
R528
R526
J303
J302
J320
J312
J321
C953
J306
Q514
Q513
Q951
J328
J342
J329
J343
Q301
Q302
J314
D901
D902
D903
R901
R902
C909
R903
D904
Q601
R603
D602
D601
R604
C602
R605
R606
D604
R608
R602
R601
C601
R904
R625
R627
C604
Q609
R629
D606
R628
R622
Q608
R626
R624
Q606
Q607
Q604
R619
R623
J352
R615
R617
R616
R621
J357
Q603
Q605
C950
R620
R612
R613
R614
D605
Q602
R610
R609
J361
C603
D603
R607
J355
J353
J350
J351
J347
J346
J356
J327
J318
J316
J315
J348
C933
C934
J339
J333
J338
J330
J317
P301B
J332
D951
D952
R953
R954
J319
J371
J372
D651
J373
R611
J380
R301
R302
C301
P632A
J326
C303
R306
R307
R308
R305
R304
C302
R309
R312
R311
C304
C305
R314
R313
C307
C306
C308
R315
R316
P901A
J354
J358
J340
J341
P631
J334
JL601
J359
JL535A
JL535B
R951
R952
R971
R972
P633
R303
E810
RED
BLACK
JL601A
B
C
E
C
E
B
B
C
E
E
C
B
E
C
B
E
C
B
E
C
B
1
8
8
8
1
1
led_socket
AC_IN
-Vee
-Vee
+Vcc
+Vcc
+15V
+15V
-15V
J385
7
17
25
15
12
22
17
12
12
12
15
7
20
7
17
7
7
17
15
15
7
7
7
12
17
7
15
7
7
Test point
P631
1. Before adjustment of idling current, turn the trimming resistor R544 to counter clockwise.
2. Short test point P631 for Amplifier is under active mode.
3. Connect the DC voltmeter to test point P531.
4. After turn POWER to ON, adjust the trimming resistor R544 so that the reading of voltmeter
becomes 0.25 mV.
<Note> No speaker load and No input signal.
5. Confirm the voltage of above point after five minutes.
6. When less than 4.40 mV : Readjust the trimming resistor above so that the voltage becomes 4.5 mV to 5.0 mV.
When 4.41 mV to 5.50 mV : Not necessary to adjust.
When more than 5.51 mV : Readjust the trimming resistor above so that the voltage becomes 5.0 mV to 5.5 mV.
Amplifier PC board
"NAAF-8275"
Test point
P531
Trimming resistor
R544