Sony ICB-1500 - Electrical Adjustment

SECTION 1
ELECTRICAL ADJUSTMENT
Recelving Adjustment
e Connection
AM RF SSG
jw put the flexible antenna
close to the set.
1kHz, 30% AM modulation
Carrier frequency : A Type : 49.890MHz
B Type : 49.830MHz
(Co
VOM
(30mV-100mV AC range)
set
speaker terminal
e Setting
Rotate the antenna/POWER switch (ANT1/S1) : ON
VOL switch (S2) : HIGH
e Procedure
Adjust T1 and T2 so that the speaker output is maximum
when receiving.
Transmission Output Adjustment
¢ Connection
Oscilloscope
TP1 o
TP2 0
e Setting
Rotate the antenna/POWER switch (ANT1/S1) : ON
VOL switch (S2) : HIGH
Short between points A and B on the MAIN board.
* Signal is transmitted only when MIC input exists
controlled by the voice control circuit. By shorting the
A-B, the voice control circuit is turned off to transmit
signal all the time.
e Procedure
Adjustment L4, L5 and L6 so that the output is maximum
when transmitting.
OSC Frequency Adjustment
e Connection
frequency counter
“cook | eee
50 +
P2 z=
Rotate the antenna/POWER switch (ANT1/S1) : ON
VOL switch (S2) : HIGH
e Setting
e Procedure
Adjust CT2 so that the TP1 frequency of type A is
49.830 + 1.5 kHz or type B is 49.890 + 1.5kHz respectively
when transmitting.
Loading Trimmer Adjustment
* Perform these adjustments after closing the cabinet.
— Simple Adjustment —
e Setting
Rotate the antenna/POWER switch (ANT1/S1) : ON
VOL switch (S2) : HIGH
¢ Procedure
Adjust CT1 so that the receiving sensitivity is maximum.
e Connection
put the flexible antenna a} Remove the
close to the set. cap and
adjust CT1.
AM FM SSG
(=
1kHz, 30%
AM modulation
Carrier frequency :
A Type : 49.890MHz
B Type : 49.830MHz
(SOmV- 100mV AC range)
=e
SS terminal