Onkyo TX 41 Service Manual

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TX-41
SERIAL NO. 3125

ONKYOQ SERVICE MANUAL

QUARTZ SYNTHESIZED
TUNER AMPLIFIER
MODEL TX-41

TABLE OF CONTENTS

Item Page
Specifications 2
Precautions 3
Special modes operation 3
Block diagram -tuner section- 4
Block diagram -amplifier section- 6
Block diagram of IC 7
Exploded view 10
Component location 12
Parts list 12
Packing view 14
Adjustment procedures 15
Schematic diagram -tuner section- (W model) 17
FM/AM tuner pc board view 19
FM/AM tuner pc board-parts list 20
Schematic diagram -tuner section- (D model) . 21
Digital circuit pc board views 23
Digital circuit pc board-parts list 23
Schematic diagram -tuner section- (G model) 25
Pro; amplifier pc board views 27
Pre. amplifier pc board-parts list 28
Schematic diagram #amplifier section- (D/W models) 29
Power amplifier pc board views 31
Schematic diagram -amplifier section~ (G model) 33
Indicator pc board views 35

ONKYoa
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TXI

SPECIFICATIONS

AMPLIFIER SECTION
Output Power:

TUNER SECTION (220 v model)

FM:
Tuning Range:

30 watts per channel, min. RMS, at
8 ohms both channels driven, from

20 HZ to 20,000 Hz, with no more 87.5 _ 108 MHZ (50 kHz smog)

than 0.06% totalh onic distortion. Usable SensitiVity Mono: 11.2 dBf, 2.0 uV
Total Harmoni Distortion: 0.06% at rated power Stereo: 192 dBf 5 "V
50 dB Quieting Sensitivity: Mono: 17.2 dBf, 4.0 V
0.06% at 1 watt output _
. . Stereo. 37.2 dBf, 40 pV
IM Distortion: 0.1% at rated power .
Capture Ratio: 1.5 dB
0.06% at 1 watt output . . .
, . Image Rejection Ratio: 80 dB
Damping Factor: 35 at 8 ohms : . :
IF Rejection Ratio: 90 dB
Frequency Response: 20 Hz - 30,000 Hz (1 1 dB) . . . ,
. . Spurious Rejection Ratio: 90 dB
RIAA DeViation: 20 Hz - 20,000 Hz (a 0.8 dB) . . .
. . . Signal-to-Noise Ratio: Mono: 71 dB
SenSitivity & Impedance: Phono: 2.5 mV, 50 k9
T Pl . 150 v 50 km Stem": 66 dB
1 a)" m Selectivity: 50 dB (: 300 kHz, 40 kHz Devi.)
Tape Rec: 150 mV, 35 k0. (PH) . . .
Ph 0 1 d' 110 v R M s 1ki-iz o 06% AM 7mm" Ram" 50 3
ono ver oa ' T HI; ' at ' Harmonic Distrotion: Mono: 0.15%
. . . ' . Stereo: 0.3%
Signal-to-Noise Ratio. Phone. 15 dB (32:0 mV input Frequency Response: 30 Hz 7 151000 Hz (a 1.5 dB)
weight ) Stereo Separation: 40 dB at 1 kHz
75 dB (II-1F A-202) 30 dB at 100 Hz a 10,000 Hz
Tape: :3 g: Effie??? Muting Level: 17.2 dBt. 4W
- : . dBf, 4
Tone Controls: Bass: : 12 dB at 100 Hz Stereo Threshold 17 2 V
Treble: : 10 dB at [0 kHz AM'
Loudness: +9 dB at 40 Hz I

Tuning Range: 522 - 1611 kHz (9 kHz steps)

+5 dB at 20 kHz

Usable Sensitivity: 30uV
Image Rejection Ratio: 40 dB
TUNER SECTION I120 V model) IF Rejection Ratio: 30 dB
FM: Signal-to-Noise Ratio: 40 dB
Tuning Range: 87.5 - 108 MHz (100 kHz steps) Harmonic Distortion: 0.8%
Usable Sensitivity: Mono: 11.2 dBf, 2.0 pV
Stereo: 19.2 dBf, 5 MV GENERAL
50 dB Quieting Sensitivity: Mono: 17.2 dBf, 4.0 pV Power Supply: 120 V, 60 Hz (D model)
Stereo: 37.2 dBf, 40_ "V 220 v, 50 Hz (G model)
Capture Ratio: 1.5 dB 120/220 V, 50/60 HZ 0 11101161)
Image Rejection Ratio: 45 13 Outputs: Speaker A & 8, Phones, Tape Rec.
1F Rejection Ratio: 80 dB Out 1 & 2, AC Outlet (unswitched)
Spurious Rejection Ratio: 80 dB (Only D model) Phono, Tape Play
Signal-to-Noise Ratio: Mono: 71 dB 1 & 2, FM and AM Antennas
Stereo: 66 dB Antennas: FM: 300 ohms balanced and 75
Alternate Channel Att.: 55 dB ohms unbalanced
AM Suppression Ratio: 50 dB AM: built-in loop antenna and
Harmonic Distrotion: Mono: 015% external terminal
Stereo: 03% Semiconductors: 6 FET, 22 transistors, 11 ICs, 74

diodes

418 x 114 x 392 mm
16-1/2 x 4-1/4 x15-7/16"
7.7 kg, 17 lbs.

Frequency Response:
Stereo Separation:

30 Hz - 15,000 Hz (11.5 dB)
40 dB at 1 kHz
30 dB at 100 Hz - 10,000 HZ
17.2 dBf, 4 uV

Dimensions (W x Hx D):

Muting Level: Weight:

Stereo Threshold: 17:2 dBf, 4 MV
* Specifications and features are subject to change without notice.
AM:
Tuning Range: 520 - 1710 kHz (10 kHz steps)
Usable Sensitivity: 30 [1V
Image Rejection Ratio: 40 dB
IF Rejection Ratio: 30 dB
Signal-to-Noise Ratio: 40 dB
Harmonic Distortion: 0.8%