2
2. The survey
Table 1, the main IC and functions
Number Function
IC
Remark
1 Power
supply
KA5Q0765RT N501
2
CPU + SIGNAL PROCESSER
TDA93x1
N301
3 Field
driver
LA78040/STV9302A
N401
4 Sound
processor
TDA9859
N122
5 Sound
driver
AN17821A
N161
6
AV SWITCH
TC4052BP
N801 (Video)
7 Memory
AT24C08
N702
8 Photo-coupler
HS817B
N504
9 IR-receiver
HS0038A
U701
10 8V
Regulator
L7808CV
N503
11 5V
Regulator
L7805CV
N505
3. The main chips instruction
1
T
c
T
. TDA93X1
he UOC (“Ultimate One Chip”) TDA93X1
is adopted in this chassis. This IC is the first available component that contains the complete
ontrol and small signal functionality needed for a TV application in one device.
he UOC TDA93X1 pins function description
:(
total 64 pins
)
Pin1: Standby control,
“
1
”
is on,
“
0
”
is off.
Pin2: SCL.
Pin3: SDA.
Pin4: Tuning PWM output.
Pin5: Auto AV control SW/NTSC SW,
Pin6: Key board input.
Pin7: Volume
Pin8: Mute control,
“
1
”
is mute,
“
0
”
is off.
Pin9: Pin12
、
Pin18
、
Pin30
、
Pin35
、
Pin41
、
Pin55: GND.
Pin10: BAND1 control output.
Pin11: BAND2
Pin12: GND
Pin13: SECAM PLL, connected with a capacitance.
Summary of Contents for 21CTS92FS
Page 1: ...SERVICE MANUAL Model 21CTS92FS www akai ru COLOUR TV SET ...
Page 8: ...7 ...
Page 10: ...Fig 4 AN17821A illustration 9 ...
Page 11: ...Fig 5 KA5Q0765RT illustration 10 ...
Page 12: ...11 Fig 6 TDA9859 illustration ...
Page 13: ...12 ...
Page 19: ......