(No.49845)1-19
SECTION 3
Adjustment
3.1
Test instruments required for adjustment
(1) Digital oscilloscope (100MHz)
(2) Frequency counter meter
(3) Electric voltmeter
(4) Wow & flutter meter
(5) Test tapes
• VT724...........................for DOLBY level measurement
• VT739..............For playback frequency measurement
• VT712....For wow flutter & tape speed measurement
• VT703........................For head azimuth measurement
(6) Torque gauge............................Cassette type for CTG-N
3.2
Standard volume position
Balance and Bass, Treble volume, Fader : Center (Indication "0")
Loudness, Dolby NR, Sound, Cruise : Off
Volume position is about 2V at speaker output with following con-
ditions, Playback the test tape VT721.
3.3
Measuring conditions (Amplifier section)
• Power supply voltage.............. DC14.4V (11V to 16V allowance)
• Load impedance............ 4
Ω
(4
Ω
to 8
Ω
allowance)
• Line out level/Impedance..............1.0V/20k
Ω
load (250 nWb/m)
3.4
Frequency band
AM mode
999kHz/62dB, INT/400Hz, 30%
modulation signal on receiving.
FM mono mode
97.9MHz/66dB, INT/400Hz, 22.5kHz
deviation pilot off mono
FM stereo mode
1kHz, 67.5kHz dev. pilot 7.5kHz dev.
Output level
0dB (1
µ
V,50
Ω
/open terminal)
Band
FM
87.5 MHz to 107.9 MHz
AM
530 kHz to 1710 kHz
www. xiaoyu163. com
QQ 376315150
9
9
2
8
9
4
2
9
8
TEL 13942296513
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299