Sansui 5900Z - Page 9

5900Z/4900Z/3900Z. F
FEED /——_ Fee sions
STEP|
SUBJECT
UU
ADJUST
|
ADJUST
FOR
REMARKS
AM S-curve Output 80 [—___teoM_ Terminal Lead Wire of EY eL3 Steep Linearity of
Adj. Genescope No. 105 eR30 for +, S-curve
(F-3318) eR34 for — Make Symmetrical
S-curve
3. | 600 kHz 600 kHz ANT Input ANT REC OUT L-CH | Bar Antenna | Max. Output
RF Adj. 30 dB Terminal or RCH
400 Hz (30% MOD.) VTVM & Scope
AM SSG
4. | 1400 kHz 1400 kHz ANT Input ANT Same as above eTCl Max. Output
RF Adj. 30d Terminal (F-3318)
dB
400 Hz (30% MOD.)
AM SSG
Input Terminal
T2 diCi dVR1 dT1 eT2 eL3 eR30 eR34 sVR2. sVR1 No.59 58
MI
12 2
| 3
2
LA1231N!
TP
F-3318
Front-end
M54459L
F-332 1
Frequency Display Tube
Terminal
No.9 SVR3
=a) Ue:
F-3324 (Conductor side)
eTCl Terminal No.105 dVR5 dVR2 dVR4 dIC2 dVR3
© After Adjustment, confirm following Voltages.
(1) V ref
Terminal No. 75 on F-3326........... 8.1V +0.5 V
(2) Vpp
Pin
No.
21
of
fICy
on
F-3326.........-.
9.2V
+0.3
V
:
(3) V tune N
Receive
535
kHz
No
MOD.
Signal
from
AM
SSG.
O
_
Terminal No. 73 on F-3326.......... . 17V
Terminal No. 76 on F-3326........... 1.2V
* In case of Vref is not within 8.1 V +0.5 V, adjust fVR1 on
F -3326.
4-3. BIAS CURRENT Adjustment (See Top View on page 14, 15)
Note:
1.
Room
Temperature
...........
18°C
~
38°C
3.
For
adjustment,
run
the
unit
for
more
than
3
minutes
2.
Before
turning
on
power switch,
turn
kVR1
on
F-3327
after
the
power
is
switched
on.
fully counterclockwise.
1. Connect DC Voit Meter between (eas L-<CH DC 10 mV This bias current adjustment
emitters of kQ13 & kQ14 on F-3327 ca er converts current value into
voltage by Ohms Law.
Same as above kKVR1 RCH DC 10 mV
i
= -
6
-L