Aiwa TV-CN202, Service Manual, Page: 20 / 33

24
IC DESCRIPTION
Pin No. Pin Name I/O Description
IC, M37272M8-113SP
1 HSYNC I OSD horizontal synchronised signal input terminal. "L"= active.
2 VSYNC I OSD vertical synchronised signal input terminal. "L"= active.
3 VOL O Volume control output. (Volume PWM 8 bit.)
4 CONT O Contrast control output. (Contrast PWM 8 bit.)
5 BRIGHT O Brightness control output. (Brightness PWM 8 bit.)
6 COLOR O Color control output. (Color PWM 8 bit.)
7 TINT O Tint control output. (Tint PWM 8 bit.)
8 SHARP O Sharpness control output. (Sharpness PWM 8 bit.)
9 STEREO / SAP I STEREO / SAP detect. (Not connected)
10 RMC I Remote control signal is led to this pin.
11 SD I
Horizontal sync. detected input. The level of this pin will be sampled by
µ
-P to
determine whether there is picture signal detected.
12 DGC – Not connected.
13 PON O
During standby mode, "H" level is inserted to switch off horizontal deflection and high
voltage.
14 AVCC – 5V supply.
15 HLF – Connected to filter.
16 VHOLD – Connected to condensor.
17 CVIN I Video signal input.
18 CNVSS – Connected to ground.
19 XIN I 8 MHz clock input.
20 XOUT O 8 MHz clock output.
21 VSS – Connected to ground.
22 VCC – 5 V supply.
TUNER SAP TUNER STEREO
Pin 23 Pin 24 Pin 35 Pin 23 Pin 24 Pin 35
MONO/SAP
L L L STEREO L L L
MONO L H L MONO L H H
SAP H L L
23, 24 ST1, ST2 O
TUNER STEREO / SAP
(NC) Pin 23 Pin 24 Pin 35
MONO/SAP L L L
STEREO L H L
SAP H L L
MONO L H H PIN 35 : MONO
25 RST I Used to reset the
µ
-P when power up.
26 SLDA I/O Data bus between
µ
-P and E
2
PROM / tuner.
27 TONE – Not connected.
28 SLCK O
Synchronizing clock between
µ
-P and E
2
PROM / tuner provided by
µ
-P through this
pin.
29 AFTV I AFT voltage from IC301 is received by
µ
-P during channel tuning.
30 KEY0 I Input key is detected by monitor.