Block - Sony CA-755 Maintenance Manual

512Hz
COUNTER
102.4Hz
COUNTER
DA, 1-48
MIC1 (X)
DA, 1-30
TP1
INCOM/PGM-2
INCOM IN (X)
INCOM/PGM-1 INCOM IN (Y)
S3
RV2
NORMAL
DYNA
LOW
LEVEL
1 2
IC11
Q22, 23
CN1455, 144-4 39 CAM DET
S2 (1/4)
IF, 4-3 25 INCOM TALK ON
Q1, D1, IC1 (1/2)
6.8V
AC. DC/DC CONV, 2-A5 47,48 INCOM 7.5V IN
REG
INCOM 7.5V IN
Q3, D2
POWER ON
AC. DC/DC CONV, 3-A3 49,50 7.5V IN
MUTE
7.5V IN
TR-101
Block Diagram
LV2
5.6M
TUNE
CF1
LV1
6.2M
TUNE
CF4
LV4
6.7M
TUNE
Q29
LV3
7.1M
TUNE
TP12
Q51
POWER ON
MUTE
6.8V IN
INCOM MUTE
PGM MUTE
5-4
TR-101
Block Diagram
TP9
TP10
RV14
IC25 (1/2) OUT LEVEL IC25 (2/2)
IC29 (1/2)
Q30
Q27
S2 (3/4)
RV6
S2 (2/4)
5-4
COMPARATOR
IC31
INCOM/PGM-4
INCOM/PGM-5
D54
Q50, 52
24V
INCOM 7.5V IN INCOM 24V 45,46 AC.DC/DC CONV, 3-A8
REG
VR, 131-5
TR-101
CA-755
CA-755P
CA-755/755P