Technics SU-V4A E - Page 6

2. Adjustment of FL power meter
@ Setting of controls and instruments to be used
1. Inputselector......... tuner 5. Low frequency oscillator
2. Speakerswitch........ main 6. AC electronic voltmeter
3. Meter range switch...... X0.01 or X1 7. 8-ohm load resistor
4, Volume..............10 (max.)
2-1
1) Connect the low frequency oscillator to the tuner terminals for both channels, and the AC electronic voltmeter to
the speaker terminals in parallel with the load resistor.
2) Set the meter range switch to ‘’X0.01" position.
3) Add 1kHz signal from the low frequency oscillator, and regulate the input level so that the AC electronic voltmeter
indicates 0.15V.
4) Adjust VR801 (L ch), VR802 (R ch) while observing the FL peak power meter until the first segment is about to turn
n (Refer to Fig. 7)
1) Set the meter range switch to ‘’X1” position.
2) Regulate the input level so that the AC electronic voltmeter indicates 8.9V.
3) Make the adjustment in the same way as mentioned in 2-1 by regulating VR803 (L ch), VR804 (R ch) so that the
8 th segment to turn on. (Refer to Fig. 8) * Each segment consists of four bars.
4) Next, make the adjustment in 2-1 by regulating the input level.
5) Again regulate the input level to make the output 8.9V, and make sure that the segment at 10W (Refer to Fig. 8)
position IS on.
0.1 il 2 ) lO 20 100
Cleft) | BERD TETUIEPTITTEEEEEEEEP EEE EG TEE
PEAK Jt I i ‘
(right) | PEEP TEER UUGT EE EEO EE TEP
0.! 1! 2 5 20 lOO
[Fig. 7] (Abb. 1)
0.1] | 62 5 16) 20 lOO
(left)
|
PEG
RATE
Pith
bin
=
PEEUTT
Ertl
;
ITTUGdt
PEAK 1 |
(right)
VOU
HEAT
LOE
PONE
PEEL
PEEL
EAOT
ERAT
EET
0.I | 2 <) lO 20 100
[Fig. 8] (Abb. 2)
rSpeakers terminal-
a itt
TP304
Clamp volt.
R338 | Adjustment
(R. ch.)
Ica Adjustment
(R.ch.)
Power
transfor-
mer
Clamp volt,
R337 | Adjustment
(L.ch.)
Ica Adjustment
{(L.ch.)