Sony CA-755 Maintenance Manual page 37

2-4-3. Data Demoduration Circuit Adjustment
To be extended : TR-101 board
Equipment : Oscilloscope
Test point : TP16/TR-101 board
Adjustment point : 1LV6 (DATA DC)/TR-101 board
: 3.75 ± 0.1 V dc
Specifications
9 8 7 6
A
TP6
TP7
B
RV11
C
RV14
D
TP10
RV16
TP15
E
E2
TP14
F
RV15
TP11 LV6
G
TP12
H LV8
TP8
LV7
J
RV5
TP4
K
LV4
RV4
L
LV3
TP1
M
RV2
RV12
N
TR-101 BOARD (A SIDE)
CA-755/755P
5 4 3 2 1
RV6
RV9
RV8 RV3
TP13
CN1
TP9
TP16
LV5
E1
TP2
TP5
LV1
TP3
LV2
RV1
2-4-3. Data Demoduration Circuit Adjustment
2-4-4. H CONT Level Adjustment
Preparation :
. Connect the CA-755/755P to a completely-adjusted
CCU.
To be extended : TR-101 board
VA-175 board (CCU-550 series) or
VA-159 board (CCU-700/700A series)
Equipment : Oscilloscope
Test point : TP80/VA-175 extension board
(CCU-550) or Pin C19/VA-156
extension board (CCU-700/700A)
Adjustment point : 1LV5 (H CONT DC)/
TR-101 board
: 2.5 ± 0.1 V dc
Specifications
2-4. TR-101 Board Adjustment
2-4-4. H CONT Level Adjustment
2-11 (E)