Sanyo dca 650 service manual

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SANYO
STEREO AMPLEFIER
DCA 650m
SERVICE MANUAL

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SPECIFICATIONS

POWER AMPLIFIER SECTION Signal to Noise: '
Music Power (IHF): PHON01,2. More than 70dB '
Amplifier load at 4 ohms 190 Watts llHF, B network)
8 ohms 130 Watts MIC More than 70dB
Continuous Power Output: lIHF, B network)
Amplifier load at 4 ohms GOW/GOW TUNER More than 90dB
8 ohms 55W/55W (lHF. B network)
ll KHz, each channel driven) AUX l, 2. More than QOdB »
Amplifier load at 4 ohms soW/sow TAPE More than 90dB l
8 ohms 45W/45W (lHF, B network) 3
l1 KHZ, both channel driven) Output Level/Impedance: TAPE REC 1, 2 : 140mV/1 K ohms I
Power Output; in the range TAPE REC DIN : 35mV/80K ohms
of 20 to ZOKHz PRE-AMP OUT : 1.2V/1K ohms
Amplifier load at 4 ohms 52W/52W > Max. 5.0V/1K ohms
8 ohms 43W/43W Harmon": Distortion: PRE-AMP OUT 0.04%
(Both channel driven) (At nominal OUtput Level)
Harmonic Distortion: Less than 01% (Continuous Power) Frequency Response:
Less than 0.05% at Power lW/ch PHONO RAA S. T. 0- equalization
Intermodulation Distortion: Less than 01% (Continuous Power) TUNER/TAPE/AUX 3° 015KHZ 30-5
Less than 004% at Power lW/ch TUNER/TAPE/AUX 10 to 60KHZ +0, -'|dB
Power Bandwidth (HF): 5 to :30an (both channel driven) "0 0 0 IOKHI +0. -1dB
Frequency Response: 5 to 100KH2 i ldB Tone C°""°|:
Input Sensitivity/Impedance: 3355 COMIC): Turnover 250Hz, i1 DdB at 50Hz
Main Power Input: 1,0V/50K ohms Turnover 500Hz,i10dB at 100Hz
Matching Speaker Impedance: 4 to 16 ohms Treble 00""0'1 Turnover 2,5KHz,t10dB at loKHz

POWER AMPLIFIER SECTION Filter Control' Turnover SKHZ' twee at QOKHZ

Damping Factor: More than 60 (1 KHz, 8 ohms) Subsonic FIt .
Signal to Noise Ratio: More than 0:18 lIHF, short circuit Low Filterzl er. ggs?f1g§;zfic;')

A "etWO'kI Loudness Control' '

. . . 100Hz, +8dB

Res'dua' HUI" and N°"' flifmgfiossfiys (Power output level at -30dB) 10KHz, +3dB

'(8 ohms. pre & main power amp.) Audio Muting: (HE 20d3
Slow Rate: Switchable MISCELLANEOUS

5 V/lts to 20 V/us Power Requirements: 110v, 220v 50/60Hz
FEE-AMPLIFIER SECTION AC Curlew Switched: Two 150 Watts

. . . . Unswitched: One 200 Watts

Input Sensltlvrty/Impedance. » » , .
(lKHZ, at rated power) PHONO 1, 2. : 2.5mV/50K ohms D'me"s'°" (we'am' 3'nt 420mm

TUNER : 140mV/60K ohms 0:3}: gggm

Aux 1, 2. : 140mV/60K ohms . _ , W"

TAPE 1' 2: : 140mV/60K ohms Weight. (Approx) Without Package 10.2 Kg

MIC : 2.5mV/50K ohms
Phono Overload Input: RMS 400mV Max.

Peak to Peak ilOOmV Max.
Mic Overload Input: HMS 500mV Max.
ADJUSTM ENT

Tool to be provided.
DC V.T.V,M. or TESTER (Input impedance: more than SOKI'I/V)
(MilirValt Meter)
Note on adjustment
1. No signal at input terminals.
2. Connect 857. - dammy load to the output terminals.

CENTER ZERO-VOLT ADJUSTMENT

(Al Turn the semi-fixed variable resistor lVR401 - 1k -5) so that the voltage of the output terminal becomes zero volt.
(B) Turn the semi-fixed variable resistor (VB/302 - 1k-B) so that the idling current becomes 30 mA ....... Measure the voltage of the both
side of the R430 resistor (0.47m and adjust the VR402 so that the value becomes 0.014 volts.