Sony CCU-TX7 Service Manual page 72

4-7-2. INCOM Deviation Adjustment
Equipment : Spectrum analyzer, Oscilloscope,
Audio generator
To be extended : AA-90 board
Preparations :
1. INTERCOM CH1/CH2 switch (CA-TX7/TX7P side panel)
— "CH-1"
2. INTERCOM LINE (CH1/PR1V/CH2)
(CCU-TX7/TX7P) front panel — "CH-1 or CH-2"
3. $2002 (2W/RTS/4W)/AA-90 board (CCU-TX7/TX7P)
=> "4w"
4. Input the 400 Hz sine wave signal of the audio generator
to pin 84 (X), pin 83 (Y) and pin 82 (GND)/extension
board (AA-90 board).
¢ Fig-2 (Refer to 4-1-5. Audio connection.)
5. Adjust the output level of audio generator so that the level
at TP43 (GND : E10)/AA-90 board is 220 mVp-p.
Test point : TP3 (GND : E1)/AA-90 board
Adjustment point : @RV41 (INCOM DEV)/
AA-90 board
_ Specifications :A=B=6.0 +0.2 kHz
Wave form image
CENT FREQ: 3.6 MHz
FREQ SPAN : 20 MHz
{e)
8&0
AY301
A-90
POMIN
008
-
BY S ace
tev
TP14 TP11 TRS
oO
O°
TP13 TPI0
Oo [o)
ie
3
INCOM ba?
Qrveor
2088
MiC-1 LEVEL
'OB
5 TONE TUNE LV101 sem TUNE
Lo?
eG, 3A
ks hiss
Se ;
Le 3)
e
ei 5
LV¥1 3.0M™ ay)
HCONT =z
g
$3 =
g8
$2005 S2002
RTS/CLEAR-COM INCOM SELECT
4-28
4-7-3. PGM Deviation Adjustment
Equipment : Spectrum analyzer, Oscilloscope,
Audio generator
To be extended : AA-90 board
Preparetions :
1. $2081 (0 dB/—20 dB)/AA-90 board (CCU-7X7/TX7P)
— "0 dB"
2. Input the 350 Hz sine wave signal of the audio generator
to pin 94 (X), pin 93 (Y) and pin 92 (GND)/extension
board (AA-90 board).
¢ Fig-2 (Refer to 4-1-5. Audio connection.)
3. Adjust the output level of audio generator so that the level
at TP44 (GND : E12)/AA-90 board is 220 mV p-p.
Test point : TPS (GND : E1)/AA-90 board
Adjustment point : @RV81 (PGM DEV)/AA-90 board
Specifications >:A=B=7.0 £0.4 kHz
Wave form image
CENT FREQ : 4.3 MHz
FREQ SPAN : 20 MHz
AA-90 Board (A SIDE)
CCU-TX7 (E\V1