Fisher CA 905 Service Manual

Page 1

SERVICE MANUAL

6229'

FISHER

AMPLIFIER CA_905

( EUROPE )

132339 41

SPECIFICATIONS
Remote Control (RCA-905) ...................................... 37-button, Phono Max. Input Capability . 170 mV
wireless remote control Tone Controls

POWER AMPLIFIER SECTION Bass (100 Hz) . 1:10 dB
Minimum RMS sine wave power per channel Mid Range (1 kHz) $10 dB
within stated bandwidth at no more than stated Treble (10 kHz) 1:10 dB
distortion and with B-ohrn load ...... 80 W (DIN) Subsonic Filter (Below 20 Hz) . ~ 12 dB/Oct
Power Bandwidth .. 40 Hz - 20 kHz Loudness Contour (100 Hz/10 kHz) . +6 dBl+4 dB

Total Harmonic Disto 0.05 %
LM. Distortion ..... 0.05 %
>40

Speaker Damping

PREAMPLIFIER SECTION
Frequency Response
Phono (RIAA)

11 dB

Aux (20 Hz -- 20 kHz . 11 dB
Input Sensitivity and Impedance

Phono .................. i. 2.5 mV/50 kn

Tape Monitor 1, 2,3 150 mV/5O kn

Tuner/CDlAux . 150 mV/50 k0

Hum and Noise (DIN)
Phono .................
Tape Monitor 1, 2,3
Tuner/CD/Aux

75 dB
90 dB
90 dB

Source Direct . .. 93 dB
GENERAL
Power Requirements _ 220 V
(50 H2) 400 w
AC Outlets ........................ 3
Dimensions (WxHx ) x48x335mm
Weight (approx) ...... WW, 8.8 kg

- Specifications and design are subject to change without notice. --

REFERENCE No. WWI-570333

60214

Page 2

POWER AMPLIFIER ADJUSTMENT

BEFORE ADJUSTMENT
Unplug the AC power cord and set the front panel controls as follows:

Power switch to OFF position

Set the SPEAKERS switch to the OFF position.

Turn the MASTER VOLUME Control to minimum.

IDLING CURRENT ADJUSTMENT VR201IVR202 (on the Maln P.C.Board) setting to mechanical center position.
Connect the AC power cord and Power switch to the ON position.

IDLING CURRENT ADJUSTMENT

This adjustment is very sensitive to changes in ambient temperature. Allow set to operate for 2 mlnutes before attempting this

alignment.

LEFT AMPLIFIER RIGHT AMPLIFIER

1. Connect the DC Voltmeter between Testpoint TP1 and 1. Connect the DC Voltmeter between Testpoint TP2 and
TPS on the Main P.C.Board. TP4 on the Main P.C.Board.

2. Adjust the VR201 for an indication ol10mv ~ 20mV on the 2. Adjust the VR202 for an indication of 10mV ~ 20mv on the
DC Voltmeter. DC Voltmeter.

ADJUSTMENT POINTS
3 ® C 3 ® C ) ® C D $ C
> < a c > < > <

LEFT CHANNEL RIGHT CHANNEL

Page 9

P.C.BOARD PARTS LIST (Continued)

:3" Part No. Descrlpuon Oty :3" Part No. Descrlpllon QIy
0251 403 070 7509 CERAMIC 150P K 50v 1 R203 401 024 7004 CARBON 1K JA 1/6w 1
0252 403 070 7809 CERAMIC 1502 K 50v 1 R204 401 024 7004 CARBON 1K .IA 1/6W 1
0253 403 0448207 ELECT 100 M 25v 1 R205 401 024 7004 CARBON 1K JA 1/6w 1
6254 403 044 8207 ELECT 10U M 25V 1 R206 401 024 7004 CARBON 1K JA 1/6W 1
0255 403 044 0201 ELECT 470 M 16V 1 R207 401 024 7004 CARBON 1K JA1/8W 1
6256 403 044 0201 ELECT 47U M 16V 1 R208 401 024 7004 CARBON 1K JA 1/6W 1
C257 403 035 2207 CERAMIC 15P K 500V 1 R209 401 024 7004 CARBON 1K JA 1/6W 1
0258 403 035 2207 CERAMIC 15F K 500V 1 R210 401 024 7004 CARBON 1K JA 1/6W 1
0259 403 035 2207 CERAMIC 15F K 500v 1 R211 401 024 7004 CARBON 1K JA 1/6w 1
0260 403 035 2207 CERAMIC 15F K 500V 1 R212 401 024 7004 CARBON 1K JA 1/6W 1
C261 4013 085 8506 CERAMIC GP G 500V 1 R213 401 025 0004 CARBON 120K JA 1/6W 1
0262 403 035 8506 CERAMIC 3P 0 500v 1 R214 401 025 0004 CARBON 120K JA 1/6w 1
C263 403 061 8000 POLYESTER 4700P J 50V 1 R215 401 025 8703 CARBON 220K JA 1/6W 1
0264 403061 8006 POLYESTER 4700P J 50v 1 R216 401 025 3703 CARBON 220K JA 1/6w 1
0265 403 057 7402 POLYESTER 0.0120 J 50v 1 R217 401 027 9005 CARBON 92K JA 1/6W 1
0266 403 057 7402 POLYESTER 0.0120 J 50v 1 R216 401 027 9005 CARBON 62K JA 1/6w 1
C267 403 057 7402 POLYESTER 0.012U J 50V 1 R219 401 025 3703 CARBON 220K JA 1/6W 1
C266 403 057 7402 POLYESTER 0.0120 J 50v 1 R220 401 025 3703 CARBON 220K JA 1/6w 1
C269 403 034 9900 CERAMIC 1002 K 500v 1 R221 401 024 7707 CARBON 100K JA new 1
0270 403 034 9900 CERAMIC 100P K 500v 1 R222 401 024 7707 CARBON 100K JA 1I6W 1
0271 403 034 9900 CERAMIC 100P K 500v 1 R223 401 024 7707 CARBON 100K JA new 1
0272 403 034 9900 CERAMIC 100P K 500v 1 R224 401 024 7707 CARBON 100K JA WW 1
0273 403 036 6600 CERAMIC 8P D 500V 1 R225 401 024 7707 CARBON 100K JA 176W 1
C274 403 036 6600 CERAMIC 8P D 500v 1 R226 401 024 7707 CARBON 100K JA 1I6W 1
0275 403 062 0900 POLYESTER 0.0470 K 50v 1 R227 401 024 7707 CARBON 100K JA 1l6W 1
0276 403 062 0900 POLYESTER 0.0470 K 50v 1 R226 401 024 7707 CARBON 100K JA new 1
0277 403 054 9706 ELECT 470 M 100v 1 R229 401 027 0507 CARBON 470K JA new 1
0278 403 054 9706 ELECT 47U M 100V 1 R230 401 027 0507 CARBON 470K JA 1I6W 1
0279 403 054 9706 ELECT 470 M 100v 1 R231 401 025 6703 CARBON 220K JA1I6W 1
0230 403 054 9706 ELECT 47U M 100v 1 R232 401 025 3703 CARBON 220K JA1/Bw 1
C281 403 068 9402 CERAMIC 100P K 50v 1 R233 401 012 5706 CARBON 1K JA 114w 1
0252 403 066 9402 CERAMIC 100P K 50v 1 R234 401 012 5708 CARBON 1K JA 1/4w 1
C253 404 012 7000 CERAMIC 0.01U P 500V 1 R235 401 013 2800 CARBON 330 JA 114w 1
0234 404 012 7000 CERAMIC omu P 500v 1 R236 401 013 2800 CARBON 330 JA 114w 1
0233 403 041 3304 ELECT 470 M 10v 1 R237 401 024 7400 CARBON 10K JA 116W 1
0290 403 042 0302 ELECT 100 M 16v 1 R241 401 026 1307 CARBON 27K JA new 1
0292 404 012 7000 CERAMIC 0.010 P 500v 1 R242 401 026 1307 CARBON 27K JA 116W 1
C293 404 012 7000 CERAMIC 0.01U P 500V 1 R243 401 025 0004 CARBON 120K JA 116W 1
0294 404 012 7000 CERAMIC 0.010 P 500v 1 R244 401 025 0004 CARBON 120K JA 116W 1
0295 404 012 7000 CERAMIC 0.010 P 500v 1 R245 401 024 7707 CARBON 100K JA 116W 1
0296 403 052 9609 ELECT 10000 M 35v 1 R246 401 0247707 CARBON 100K JA 116W 1
0297 400 052 9609 ELECT 10000 M 35v 1 R247 401 026 4306 CARBON 3.3K JA 116W 1
0296 404 012 7000 CERAMIC 0.01U P 500V 1 R248 401 026 4308 CARBON 3.3K JA 1/6W 1
0299 404 012 7000 CERAMIC 0.010 P 500V 1 R249 401 026 1000 CARBON 2.7K JA 116W 1
0300 404 012 7000 CERAMIC 0.01u P 500v 1 R250 401 026 1000 CARBON 2.7K JA 116W 1
0301 404 012 7000 CERAMIC 0.010 P 500v 1 R251 401 024 7400 CARBON 10K JA 116W 1
0302 404 043 0001 ELECT 680w M 63v 1 R252 401 024 7400 CARBON 10K JA 116W 1
or 404 040 4101 ELECT BMW M 63V 1 R253 401 027 2600 CARBON 5.6K JA 116W 1
0303 404 043 0001 ELECT 6800U M 63v 1 R254 401 027 2600 CARBON 5.6K JA 116W 1
or 4040404101 ELECT 66000 M 63v 1 R267 401 012 5709 CARBON 1K JA 114w 1
0304 403 044 8207 ELECT 100 M 25v 1 R268 401 012 5708 CARBON 1K JA 174w 1
0305 403 044 6207 ELECT 100 M 25v 1 R269 401 026 1000 CARBON 2.7K JA 1/6W 1
0306 403 044 6207 ELECT 10u M 25v 1 R270 401 026 1000 CARBON 2.7K JA 116w 1
0307 403 044 6207 ELECT 10U M 25v 1 R271 401 016 1503 CARBON 22 JA 174w 1
0303 403 042 0302 ELECT 100 M 16v 1 R272 401 016 1508 CARBON 22 JA 174w 1
0309 403 039 7802 ELECT 100u M 10v 1 R273 401 024 7400 CARBON 10K JA 175w 1
6317 403 042 0302 ELECT 10U M 161/ 1 R274 401 024 7400 CARBON 10K JA IISW 1
C318 403 039 7002 ELECT 100U M 10V 1 R275 401 024 7400 CARBON 10K JA 115W 1
0319 A 620 006 6679 Capacitor 0.01 MF400v 1 R277 401 012 5703 CARBON 1K JA 174w 1
6321 403 068 9402 CERAMIC 100P K 50V 1 R278 401 012 5708 CARBON 1K JA 1/4W 1
0322 403 068 9402 CERAMIC 100P K 50v 1 R279 401 016 2604 CARBON 220 JA 174w 1
6323 403 004 8101 CERAMIC 1P C 500V 1 R280 401 016 2604 CARBON 220 JA II4W 1
C324 403 004 8101 CERAMIC 1P 0 500V 1 R281 401 025 8200 CARBON 22K JA VIEW 1
0325 403 047 1502 ELECT 4.7U M 25v 1 R282 401 025 5200 CARBON 22K JA 175W 1
0321 403 0443207 ELECT 100 M 25v 1 R233 401 024 7004 CARBON 1K JA1/5W 1
0329 403 009 3100 CERAMIC 100? J 50v 1 H284 401 024 7004 CARBON 1K JA 175w 1
6330 403 009 3100 CERAMIC 100P J 50V 1 R285 401 027 0309 CARBON 47K JA 1/5W 1
0331 403 006 4209 CERAMIC 1P C 50V 1 R286 401 027 0309 CARBON 47K JA IIBW 1
0332 403 006 4209 CERAMIC 1? C 50v 1 R257 401 025 9502 CARBON 240 JA 1/5W 1
0345 403 068 9402 CERAMIC 100? K 50v 1 R283 401 025 9502 CARBON 240 JA 115w 1
0345 403 066 9402 CERAMIC 100P K 50v 1 R269 401 024 9701 CARBON 12K JA 115W 1
0347 403 063 9402 CERAMIC 1001' K 50V 1 R290 401 024 9701 CARBON 12K JA NEW 1
C348 403 065 9402 CERAMIC 100? K 50V 1 R296 401 024 9701 CARBON 12K JA 1/5W 1
0349 403 068 9402 CERAMIC 100P K 50v 1 R294 401 024 9701 CARBON 12K JA 115w 1
0350 403 068 9402 CERAMIC 100P K 50V 1 R295 401 025 7805 CARBON 2.2K JA 1/6W 1
6351 403 060 9402 CERAMIC 100P K 50V 1 R296 401 025 7805 CARBON 2.2K JA 1/6W 1
0352 403 068 9402 CERAMIC 100P K 50V 1 R299 401 025 7505 CARBON 2.2K JA WW 1
R201 401 024 7004 CARBON 1K JA 1/6w 1 R300 401 025 7605 CARBON 2.2K JA 1/5W 1
R202 401 024 7004 CARBON 1K JA new 1 R301 402 035 9902 FUSIBLE RES 62 J~114w 1

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