Yamaha a 300

Page 1

W
1
v

STEREO INTEGRATED AMPLIFWER

A 3CU

SERVICE, MANUAL

IFRONT PANEL f 7 I 1

- OMAHA mmmm mam mam mm

paws:

pnwen

ICONTENTS
SPECIFICATIONS .................. , . . . . l
REAR PANELS ......................... 2
INTERNAL VIEW ....................... 3
DISASSEMBLY PROCEDURES ........... ... 3
ADJUSTMENTS ........................ 5
BLOCK DIAGRAM ...................... 5
PRINTED CIRCUIT BOARD ................ s
SCHEMATIC DIAGRAM ................... 7
. , SINCE 1887
004504 r I; r V NIPPDN GAKKI CO LTD. HAMAMATSU JAPANV

Printed in Japan 2 33. 2 6k 122 my

Page 2

Ill-300

.SPECIFI CA'I'I 0N5
Continuous Power Per Channal Residual Noiss (IHF A anork) iaouv
20Hz "' ZOkHz l'ona Control Characteristils .
(0.05% THD, 8m sow + sow Bass boon/cut 2 "as (a: son)
1kHZ (0.05% THD, 8S7.) 32W + 32W Bass turnover frequency 3005 2
DIN Standard Output Power Treble boost/cut 2 15.13 (at lokHz)
Per Channel Treble turnover frequency 3.0kHz
(HZ (1% T. D: 89) 35W (GHB) Cominuous Loudness Control
PW Bandwudth (Laval-related equalization)
(0.05% TH D, 15w 8m 10H: ~50kHz Attenuation mm (at 1kHzl
Dam ing Factor V . .
(50:41, am better than 4o 6:2)" "mm" 5""
. . . to -60dB) 268
Input Somltmty/lmpedanca
Phono 2.5mV/47kn PW SUPPi
AUX, Tape, Tuner 150mV/35kn General model A01 10/120/220/240V,
input Sensitivity (NM IHF) . , 5°I5°Hl
Ph 0 no 0'47", British and Australian models 240V, 50Hz
AUX, Tape, Tuner ZBmV European model 220V. 50Hz
Maximum Input Signal Level Power Consumption
Phone (1 kHz, 0.02% TH D) 170mV General model 120W
Output Level/lmpodance European, 57},in 37m; , 7 7
, H m ~fiec0ut¥¥ ,,_, , 150mv/47on " " Auafialian models 130w
Hadphong Jack Rated empm/ Dimensions (W x H x D) 45 x 92 x 293mm
lnlpodamze (0.05% TH D, 89.) 500mV/220S2 (17-1/8x3-5/8x11-1/Z)"
Frequency Response Weight 52kg (11.5 lbs)
Aux, Tape, Tuner 20H: ~2DkHz, 1 0.5413
RIAA Equalization Deviation - A: Australian made!
Phone 1 (15:13 G: European model
Total Harmonic Distortion 8: British made!
Aux, Tape,Tuner to Sp Out R: GenBIaI model
(14W/ 8m 03% < ucarions sub' '
, lmar modulation Distortion pet to change without notice.
Aux,_lfape, Tuner Rated
Output/852 ' 0.05%
Signal-to-Noise Ratio
(IH F~A-Network)
Phono (5mV, input shorted) 8MB] BZdB (G)
Aux, Tape, Tuner (5.1 km 98:13