Goodmans GPS160MPT, Service Manual

Page: 9 / 44

BAND•TAPE PLAYBACK
NO.
ITEMS Measurement Conditions UNIT NOMINAL LIMIT
S/N
MIC I/P S.G. 1KHz X@ MIC SENS. +30dB VS NO
SIGNAL
AC Bias
dB / /
TCD784 Record/Playback Volume Control to Ref. Output for Pause DC
Bias
dB 28 20
THD @ MIC I/P SENS
AC Bias
% / /
DC Bias
% / /
WITH 1KHz BPF
AC Bias
dB / /
18 Record/Playback
ERASE
RATIO
DC Bias
dB / /
19 DC Operation Voltage Range DC Supply Voltage Change DC Voltage V / /
20 AC Operation Voltage Range AC 230V % / /
21 Record MIC Sensitivity 1 KHz Input Level In dB Recording /Play to Tape
–
5dB dB / /
22 Record MIC ALC 1 KHz Input Level In dB Ref. Record MIC Sensi30dB dB / /
125 Hz dB / /
23 Record MIC FREQ
6K3
@ 1KHz MIC MAX. Sens. (-66dB I/P)
dB / /
24
Record MIC ALC Recovering
Time
1KHz MIC MAX. Sens./60 S
’
VS +30dB/ 60 S
’
VS MAX. Sens. /60 S
’
MIC MAX. Sens. Set to dB Recover 90% of Output Time
Sec / /
Beat 0 KHz / /
25 AC Bias Oscillation Freq.
Beat 1
VTVM +(x10 Probe) Measure the OSC Coil High-END Side
KHz / /
Pos 0 Vrms / /
26 AC Bias Voltage
Pos 1 Vrms / /
27 MAX. Distortion MTT-112B MT-112B Volume = MAX. Measure Output Power % / /
FM FM Urf=1mV AF=1000Hz MOD.= 75 KHz 98MHz dB 0
±3
28
Level Differences to Din
Tape=0 dB
(MTT-112B) VS Set to 0dB
AM AM Urf=100dB AF=1000Hz MOD.=80% 1000KHz dB 0
±3
CD CD 0dB TCD-784 NO.2 dB 0
±
6