Fisher CA 520 Service Manual

Page 2

. g >9AQINEI38: CHASSIS EXPLODED viewings-3.2 3,2 1:15. ; n2:

A

POWER AMPLIFIER ADJUSTMENT

BEFORE ADJUSTMENT

Unplug the AC power cord and eet the front panel controls as Iollowe:

Power Switch to OFF position. *1 '
Set the SPEAKERS Switch to the OFF poeitlon. A
Turn the MASTER VOLUME Control to mlnirnum.

90...

House cunnsm' ADJUSTMENT

Connect the AC power cord and Power Switch to the ON position.

This adjustment is very sensitive to chengee In ambient temperature. Aliow eat to operate tor 2 minutes beiore attempting this

allgnment.

LEFT AMPLIFIER

1 Connect the DC Voltmeter between the Right teed of R411
('e'merk) and Left lead of R419 ('e'mnrk) on the Main
P.C.Boerd.

2. Adjust the VR401 [or en Indication of MN 10.5th on the
DC Voltmeten

RIGHT AMPLIFIER

1. Connect the DC Voltmeter between the Left lead at 3418
(" e 'merit) and Want lead oi R420 ( e'merk) on the Main
P.C.Boerd.

2. Adjust the vmoz lor In indlcetion ol va 10.5mV on the
Dc Voltmeter.

n: .--~4<-4

Page 6

P.C.BOARD PARTS LIST (Continued)

:3" Pan No. Descripuon QIy :2" Parr No. Description O'Iy
R318 401 027 2303 CARBON 560 JA 1/6W 1 or 405 073 1204 TF1 28013111 1
R319 401 028 0001 CARBON 510 JA 116W 1
R320 401 028 0001 CARBON 910 JA 1/8W 1 POWER TR L- P.C.B ASSV
R321 401 024 9305 CARBON 1 2K JA 1/6W 1 56 620 190 6011 Power TR L , PCB Assy 1
R322 401 024 9305 CARBON 1 2K JA 1/6W 1 0403 405 073 1105 TR 2881039-K 1
R323 401 024 8407 CARBON I 1K JA 1/6W 1 or 405 073 1006 TR 25A1039-L 1
R324 401 024 8407 CARBON 1 1K JA 1/6W 1
R325 401 024 8407 CARBON 1 1K JA 116W 1 POWER "7 fl- P.C.D. ASSY
R326 401 024 8407 CARBON I 1K JA 116W 1 57 620 190 6028 Power TR R- F GE Assy 1
R827 401 025 8703 CARBON 220K JA 1I6W 1 0404 405 073 1105 TR 2531039-K I
R328 401 025 8703 CARBON 220K JA 116W 1 or 405 073 1006 TR 2SA1039-L 1
R329 401 024 7707 CARBON 100K JA 116W 1
R330 401 024 7707 CARBON 100K JA 116W 1 BIAS TR LEFT F.C.B. ASSY
R331 401 027 0309 CARBON 47K .IA 116W 1 58 520 190 6035 Bias TR Leh FEB [4557 1
R332 401 027 0309 CARBON 47K JA 116W I 0405 405 026 0303 TR 230947 1
R333 401 026 7408 CARBON 39K JA 116W 1
R334 401 026 7408 CARBON 39K JA 1/6W 1 BIAS TR RIGHT P.C.B. A357
R335 401 026 1307 CARBON 27K JA 1/6W 1 59 620 190 6042 Bias TR Righl P C B Assy I
R336 401 026 1307 CARBON 27K JA 1/6W 1 0406 405 026 0803 TR 250947 I
R337 401 025 5603 CARBON 390 JA 1/6W 1
R338 401 026 6609 CARBON 390 JA 116W 1 SPEAKER SWITCH P.C.BA ASSY
R339 401 026 6609 CARBON 390 JA 1/6W 1 60 620 190 6058 Speaker Swilch P CB Assy 1
R341) 401 026 6609 CARBON 390 JA 116W 1 SW401 620 016 5815 Switch Push I Key 1
R341 401 026 6609 CARBON 390 JA 116W 1 W405 620 182 9457 Wire 4 Parallel 1
R342 401 026 6609 CARBON 390 JA 1/6W 1 R435 401 061 2604 OXIDE-MT 330 JB 1W 1
3411 401 026 6609 CARBON 390 JA 1/6W 1 R436 401 051 2604 OX1DE-MT 330 JB 1W I
344 401 026 6609 CARBON 390 JA IIGW 1 R437 401 017 0907 CARBON 270 JA 114W 1
.4345 401 026 6609 CARBON 390 JA 1/6W 1 R438 401 017 0507 CARBON 270 JA 114W 1
R346 401 026 6609 CARBON 390 JA 116W 1 R439 401 017 0607 CARBON 270 JA 114W 1
R347 401024 7400 CARBON 10K JA 116W 1 R440 401 017 0807 CARBON 270 JA 114W 1
R343 401 024 7400 CARBON 10K JA 116W 1
R349 40'. 024 7400 CARBON 10K JA 1I6W 1 H.P JACK ROB. ASSV
R351] 401 024 7600 CARBON 10K JA 1/6W 1 61 620 1906066 H P Jack PCB Assy 1
R351 401024 7400 CARBON 10K JA 116W 1 620190 5564 Jack 8P 1
R352 401 024 7400 CARBON 10K JA 1/6W 1
R353 401 024 7400 CARBON 10K JA 1/6W 1 SPEAKER VERMINAL P.C.B. ASSY
R354 401 024 7400 CARBON 10K JA 1I6W 1 62 620 190 6073 Speaker Terminal P.C B. Assy 1
R355 401024 7400 CARBON 10K JA 1/6W 1 620 022 5151 41 Push Terminal 1
R356 401 024 7400 CARBON 10K JA II6W 1 W409 620 020 5887 ConnecIor 1P Assy I
C428 403 069 1207 CERAMIC 100013 K 50V 1
CONTROL PANEL P.C.B. ASSY C424 403 069 1207 CERAMIC IODOP K 50V 1
53 620 190 5984 CDDIIDI Panel '7 OB Assy 1 C425 403 0691207 CERAMIC IOOOP K 501/ I
620 188 0960 ReIIecIor 1 0426 403 069 1207 CERAMIC IOOOP K 50V 1
411 021 1202 SCR S-TPG BIN 2X5 3
SW203 620 190 5472 Push Switch 1 Key (Source Olrecl SW.) 1 POWER IND. 9.0.8. ASSY
VR201 620 191 9806 Slide Volume (IN-200m) 1 63 620 190 6080 Power IND. RD E Assy 1
VRZDZ 620 190 5030 Volume IBASOKQXZ) 1 0510 407 105 5000 LED SLP-SuB-dl 1
W202 620 0241991 Wire 5 Parallel 1 $1621 401020 2003 CARBON 4 7K JA 1/4W 1
W602 620 191 0421 Jumpgr 1
0601 407 102 7706 LED SELZGIGA 1 POWER SUPPLV P.C.8. ASSY
0502 407 102 7708 LED SEL2813A 1 64 620 190 6057 Power Supply P C B Assy I
9603 407 102 7706 LED SEL2813A I 620 017 2721 Fuse CIID 4
#0504 407 102 7708 LED SEL2013A 1 620 017 7153 Sockel 2? I
605 407 102 7706 LED SEL2813A 1 620 017 7160 Sockel 2P 1
0606 407 102 7706 LED SEL2813A 1 620 017 7177 Socket 2P 1
DEW 407 102 7706 LED SELZSIEA I A 423 005 0507 FUSE 250V 71A 2
0605 407 035 3400 LED SLR-673861 1
17609 407 035 3400 LED SLR-673861 1 EC TERMINAL P.C.B. 4557
R213 401 024 7004 CARBON 1K JA 1/6W 1 65 620 190 6103 EC Terminal P C B Assy 1
R214 401 024 7004 CARBON 1K JA 1/6W 1 620 022 2587 EC Terminal 1P 2
R601 401 014 4105 CARBON 1.5K JA 1/4W 1 520 0314763 Wire Wrap Terminal 1
R603 401 0144105 CARBON 1.5K JA 114W 1
R605 401 0144105 CARBON 1.5K JA 1/4W 1 POWER TRANS FILE. ASSY
R607 401 014 4105 CARBON 1.5K JA 114W 1 66 620 190 6110 Power Trans P CB Assy I
R609 401 014 4105 CARBON 1.5K JA 1/4W 1 W501 620 024 2011 Wire 3 Parallel 1
R611 401 017 0807 CARBON 270 JA 114W 1
9613 401 017 0807 CARBON 270 JA 114W 1 POWER TRANS 2 F.C.B. ASSY
R515 401 017 0807 CARBON 270 JA 114W 1 57 620 190 6165 Power Trans 2 P CB, Assy 1
R617 401 016 3809 CARBON 2.2K JA 114W 1 W502 620 024 2066 Wire 4 Parallel 1
11619 401 016 3809 CARBON 2.2K JA 1/4W I

POWER TR I. + P.C.B, ASSY
54 620 190 5991
0401 405 073 1303
or 405 073 1204

TH 2SDI$117K
TF1 2801311-L

POWER TR R+ P.C.B. 4557
55 620 190 6004

0402 405 0731303 TR 25013117K

Power TR L + P.C.BI Assy

Power TR F + P C B Assy

NOTES:

1 Pans order must COHIBIR Model Number, Part Number am} 09A

54 up! IO"

2 Ordering Quantity (:1 screws and IESISIOrS musl be muliiple 01 10

pcs