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IC DESCRIPTION
IC, UPD16432B
Pin No.
Pin Name
I/O
1 ~ 4
LED1~4
O
LED output, Nch open-drain.
5
VSS
-
GND.
6 ~ 10
VCL5 ~1
-
Dot matrix LCD driver power supply.
11
VLCD
-
LCD driver power supply.
12
VCC
-
Internal logic power supply.
13
SYNC
I/O
Input/output singnal synchronization.
When "L", a forced LCD OFF operation is performed, and SIGn & COMn output the
14
LCD OFF
I
unselected waveform.
15
RESET
-
Initial state is set when "L".
"H" if there is KEY data, "L" if there is none. KEY data can be read in respective of the
16
KEYREQ
O
state of this pin, CMOS output.
17
CLI
I
DATA shift clock. DATA is read on rising edge, and output on falling edge.
Performs input of commands, key data etc., and key data output. Input is performed
from the MSB on the rise of the shift clock, and the first 8 bits are recognized as a
18
DATA
I/O
command. Output is perform from the MSB on the fall of the shift clock. Output is
Nch open-drain.
Strobe input, DATA input is unabled when "H". Command processing performed on a
19
STB
I
fall.
20, 21
OSCIN,OSCOUT
I/O
Oscillation circuit.
22 ~ 25
KEY1~4
I
KEY scanninng key data input.
26 ~ 33
KS1~6
O
KEYscanning key source output.
34 ~ 90
SEG9~65
O
Dot matrix LCD segment output.
91 ~ 100
COM9~O
O
Dot matrix LCD common output.
Description
15
ELECTRICAL ADJUSTMENT
A MAIN C.B
TP1(Lch)
1. Dolby NR Adjustment
Settings : • Test tape : TTA–200
• Test points : TP1(Lch), TP2(Rch)
• Adjustment location : SFR201(Lch), SFR202(Rch)
Method : 1. Play a Dolby NR tape and adjust SFR201 and
SFR202 so that the Lch (TP1) and Rch(TP2) levels
are 300 ± 5mV.
2. Adjust the level in the forward running direction,
and then check in the reverse direction. If the level
drifts from the specification, perform readjust-
ment.
PRACTICAL SERVICE FIGURE
<TUNER SECTION>
<FM SECTION>
IHF Sensitivity:
Less than 10 dBµV
(S/N 30dB)
[at 87.5/98.0/108.0 MHz]
Signal to noise ratio:
More than 57 dB (mono)
More than 57 dB (stereo)
[at 87.5/98.0/108.0 MHz]
Distortion:
Less than 1.5% (mono)
Less than 2.0% (stereo)
[at 98.0 MHz]
Stereo separation:
More than 22 dB
[at 98.0 MHz]
IF Frequency:
10.7 MHz
<MW SECTION>
Sensitivity:
Less than 35 dBµV
(S/N 20 dB)
[at 603/999/1404 kHz]
Signal to noise ratio:
More than 42 dB
(INPUT 74 dB)
[at 603/999/1404 kHz]
Distortion:
Less than 1.5%
[at 999 kHz]
IF Frequency:
450 kHz
SFR202
(Rch)
TP2(Rch)
1
GND
SFR201
(Lch)
TUN101
<LW SECTION>
Sensitivity:
Less than 40 dBµV
(S/N 20 dB)
[at 162/216/270 kHz]
Signal to noise ratio:
More than 37 dB
(INPUT 74 dB)
[at 162/216/270 kHz]
Distortion:
Less than 1.5%
[at 216 kHz]
<DECK SECTION>
Tape speed:
2955 ~ 3090Hz (TTA-100)
Wow & flutter:
Less than 0.35% (R.M.S)
Max Output level:
more than 9 V (TTA-210)
Distortion (PB):
Less than 2.0% (TTA-210)
Noise level:
Less than 100 mV (at 120 µs, Vol Max)
Signal to noise ratio:
More than 48 dB
16
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