Akai ACR-57, Service Manual

Page: 5 / 15

5
OPERATION CHECK
GENERAL SPECIFICATIONS OF SIGNAL
Standard frequency
Signal output
Modulation FM
MW
LW
FM
MW
LW
MW
FM Stereo 98.1 MHz (87.5, 108 MHz)
1000 KHz (522, 1620 kHz)
200 KHz (144, 288 kHz)
1mV
5mV
5mV
400 Hz 30% MOD.
1 kHz 75 kHz DEV.
90% for L only or
R only pilot level 10%
AF output level FM/MW/LW
Power source voltage DC 14.0V (Backup voltage is the same as this)
AF load impedance 4 ohm pure resistance
Balance Center position of level
Tone Center position
The signal strength read in this section is voltage on the antenna.
Test Diagram
4-SPEAKER
VTVM
DISTORTION
METER
2-SPEAKER
FRONT
SPK.
SPK.
FL.
RL.
SPR.
MAIN UNIT
AM SG
VTVM
ANTANNA
DUMMY
FM SG
MODULATOR
STEREOS
MPX
ANT
FRONT
SPK.
SPE.
FR.
RR.
4-SPEAKER
SPK.
2-SPEAKER
POWER ANTANNA
ACC (DV14.4V)
GROUND
BACK UP (14.4V)