Adjustment Procedures - Onkyo TX-DS747 Service Manual

TX-DS747
ADJUSTMENT PROCEDURES
Preparation
FM mono: 1kHz, 75kHz devi., 60dB/ u V Connect the non-inductive type resistor of 8 ohms
FM stereo: 1 kHz, 67.5kHz devi., 60dB/ 1 V to the all speaker terminals unless otherwise noted.
Pilot signal 19kHz 7.5kHz devi
AM: 400Hz, 30% mod.
FM ADJUSTMENT
Connection FMSG Stereo modu-| Tuning | Output | Adjustment | Adjust
of instrument output lator output [frequency | indicator point for
DC voltmeter | _LI101 20mV.
99.0MHz
FM MUTE/MODE
IFT on the switch:ON/AUTO
Fig.
crt
99.0MHz | AC voltmeter]
"fi teng, | Maximum | Repeat the steps 1
further adjustment
analyzer
| E1102}
Minimum | fanber adi
Channel L. Channel R i
Stereo 99.0MHz, IkHz AC voltmeter Minimum | aximum and
Separation Ea mod 89.0MEe: R1150 same separation
65dBf(60dB)
Channel R
Channel L
M
dkHz AC voltmeter umm
Remarks
Muting 99.0MHz
Level
TUNED
99.0MHz| Oscilloscope indicator
19.2dBf(14dB) lights on
RDS data
8 OE ba
57ke 3% | 98:0MHe| Oscilloscope
Maximum
devi
AM ADJUSTMENT
120V model
Reference Specification
FM tuned voltage'87 50MHz~ 108 00MHz
More than 1.3V~Less than 9V
AM tuned voltage:S30kHiz~1710kHa
4£0.4~Less than 9 0V
Digital OSC coil
530kKHz, on RF 1420.2V
voltmeter | block L1105
on
60¢B/m block L1105
Maximum
L106 Maximum
230V and Wolrdwide models
Reference Specification
Tuning | Output Adjustment FM tuned voltage'87 50MHz2~ 108,00MHz
Frequency| Indicator point Adjust for More than 1 3V~Less than 9V
AM tuned voltage: See 16) is
SeekHe | Dighal
OSC coil
£0-4~Less than 9.0V
or IC on 1420.2V aay model)
531kHz voltmeter block L1105 AM tuned voltage: anes 1602kHz
1404~Less than 9 0V
603kHz
AC
RF coil
(Worldwide model)
Maximum
400Hz 30% mod. | 603kHz
60dB/m
on RF
volumeter | block L1105
+
999kH2 AC
00H 30% mod 999KH2 | \oitveter 11106 Maximum