Onkyo TX 8500 Service Manual

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Extracted text from Onkyo TX 8500 Service Manual (Ocr-read)

Page 1

QUARTZ lOCKED
STEREO RECEIVER
MODEL 'I'X-8 500

SE RIAL No. 3032

ONKYOQ SERVICE MANUAL

INDEX

Item Page

Speciﬁcations 2
Circuit Description 3
Component Location 4
Block Diagram 5
AM/FM Alignment Procedures 6
Chassis Layout 10
Parts List 1 1
Service Procedures 12
Stringing Diagram 12
AM/FM Tuner RC. Board View 13
AM/FM Tuner P.C.B. - Parts List 13
Front End, Equalizer and Tone P.C. Board View 15
Front End, Equalizer and Tone P.CrB. - Parts List 16
Power Amp. P.C. Board View 17
Power Amp. P.C.B. iiParts List 17
Power Amp.Alignrnent Procedures 18
Rectiﬁer P.C. Board View 19
Rectifier P.C.B. - Parts List 20
Schematic Diagram 7 Universal model 21
Schematic Diagram -~ U.SrA. model 25
29

Packing Procedures

ON KYO®
Alllllll IIIIMPIINENIS

Page 2

SPECIFICATIONS

Power Supply Rating ac 120 volts 60 HZ (USA. model) Power amp. Tilt better than 5% at 50 Hz

ac 220 volts 50/60 Hz (Universal Sensitivity and PHONO: 2.5 mV 50 kohms
model) Impedance TAPE PLAY: 150 mV 50 kohms
Controls POWER TAPE REC: 150 mV
SPEAKERS (OFF, A, B, C, A+B, DOLBY OUT: 150 mV 3 kohms
A+C) DOLBY IN: 350 mV (30 %)
SELECTOR (AM, FM, PHONO 1, PRE OUT 1V 5%) léolﬁms
PHONO 2 : 0 ms
TAPE MO)NITOR 1, 2 & 3 MAIN IN: IV 50 kohms
TUNING, VOLUME, BALANCE, Phono Overload 250 mV RMS at 1 kHz, 0.1% THD.
TREBLE, MID, BASS, DOLBY NR Tone Controller TREBLE: i10 dB at 10 kHz
SWITCH, FM MUTING/LOCK MID RANGE: 15 dB at 1.2 kHz
SWITCH, LOUDNESS, MODE, BASS: 112 dB at 100 HZ
FILTER HIGH & LOW, AUDIO Signal to Noise Ratio PHONO: 65 dB (IHF C)
MUTING, SENSOR SWITCH 75 dB (IHF A)
A. éifAEolSAlELbl d .1 mm 33338328
11 ennas 2 0 ms a ance an
75 ohms unbalanced RIAA Curve Deviation :02 dB, 30 Hz to 15 kHz
AM: built in ferrite core antenna Filters HIGH: 6 kHz (12 dB/oct.)
and external terminal LOW: 100 Hz (12 dB/oct.)
Outputs SPEAKER A, B & C, Loudness +5 dB at 10 kHz
HEADPHONES +5 dB at 100 Hz
TAPE REC OUT 1, 2 & 3, Audio Muting 720 dB
FM DOLBY OUT
PRE OUT, FM 4 CH OUT
AC OUTLET SWITCHED &
UNSWITCHED x 2
Inputs PHONE 1 & 2, TAPE PLAY 1, 2 & Tuner section
. 1 3 FM DOLBY IN: MAIN IN Tuning Range FM: 88 - 108 MHz
Dmensmns 570 W X0160 H X 4,,55 D mm ,, AM: 530 - 1605 kHz
- 227/16 X 65/16 X 17.15/16 Usable Sensitivity FM mono: 1.7 1.1V, 9.8 dBf
5 25 kg- 55 5' . FM stereo: 411v, 17.2 dBf
Semiconductors 1 FET, 95 Tranmstors, 8 ICs, 50 dB Quieting FM mom): 3 V, 14.7 dBf
58 Dmdes Sensitivity FM stereo: 35 11V, 36 dBf
Ampliﬁer section Intermediate Frequency 5:11:44. Aggy-[:12
Power Output . 150 watts per channel, min. RMS, Ca ture Ratio FM: 1 5 dB
(through TAPE) at 4 ohms both channels driven, 1m: e Re'ection Ratio FM: 8'3 dB
from 20 Hz to 20 kHz, with no E J AM: 55 dB
more than 0.1% total harmonic IF Reectiun Ratio FM: 100 dB
distortion. 1 AM: 55 dB
110 watts per channel, min. RMS, Spilrious Rejection FM: 95 dB
at 8 Ohms b°th haels driven, Signal to Noise Ratio FM mono: 70 dB
from 20 Hz to 20 kHz, With no FM stereo 65 dB
more than 0.1% total harmonic AM' ' 45 dB
distortion. .'
160 watts per channel min. RMS, Altfagsiacgémnnel FM 70 dB
at 4 ohms both channels driven, AM Suppression Ratio FM: 50 dB
leI-Iz,'0.1% total harmonic Harmonic Distortion FM mono: 0.15%
distortion. . FM stereo: 0.3%
115 watts per channel min..RMS, AM: 0.8%
at 8 ohms both channels driven, Frequency Response FM: 30 -15,000 Hzil.5dB
1111;213:0211] % total harmonic Stereo Separation FM: 40 dB at 1 kHz
Total Harmonic (TAPE) 0.1% at Rated power _ ~ 32 dB at 70 10000112
- Mutmg Level FM. 4 MV, 17.2 dBf
Distortion 0.08% at 1 watt, 8 ohms Stereo Threshold FM: 4 14V, 17_2 dBf
IM Distortion (TAPE) 0.1% at Rated power Q t L ck Level FM" 4 0V 17 2 dBf
(70 Hz: 7 kHz=4:1) 0.08% at 1 watt, 8 ohms 51:11:13; ' s '
Damping Factor 50 (8 ohms, 1 kHz) Suppression FM: 60 dB

Frequency Response

15 7 30,000 Hz (:1 dB)

2 7 60,000 Hz (:1 dB at power

amplifier)

Specifications are subject to change without notice.