IC DESCRIPTIONELECTRICAL ADJUSTMENT
IC, UPD16432B
A MAIN C.B
Pin No.Pin NameI/ODescription
1 ~ 4LED1~4OLED output, Nch open-drain.
5VSS-GND.
6 ~ 10VCL5 ~1-Dot matrix LCD driver power supply.
11VLCD-LCD driver power supply.
12VCC-Internal logic power supply.
13SYNCI/OInput/output singnal synchronization.TP1(Lch)SFR202
(Rch)
When "L", a forced LCD OFF operation is performed, and SIGn & COMn output the
14LCD OFFI
unselected waveform.TP2(Rch)
1
15RESET-Initial state is set when "L".GNDSFR201
(Lch)
"H" if there is KEY data, "L" if there is none. KEY data can be read in respective of the
16KEYREQO
state of this pin, CMOS output.
17 CLIIDATA 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
TUN101
from the MSB on the rise of the shift clock, and the first 8 bits are recognized as a
18DATAI/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
19STBI
fall.
20, 21OSCIN,OSCOUTI/OOscillation circuit.1. Dolby NR Adjustment
Settings : Y Test tape : TTA�200
22 ~ 25KEY1~4IKEY scanninng key data input.
Y Test points : TP1(Lch), TP2(Rch)
Y Adjustment location : SFR201(Lch), SFR202(Rch)
26 ~ 33KS1~6OKEYscanning key source output.
Method : Play a Dolby NR tape and adjust SFR201 and1.
34 ~ 90SEG9~65ODot matrix LCD segment output.SFR202 so that the Lch (TP1) and Rch(TP2) levels
91 ~ 100COM9~OODot matrix LCD common output.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><LW SECTION>
IHF Sensitivity:Less than 10 dB?VSensitivity:Less than 40 dB?V
(S/N 30dB)[at 87.5/98.0/108.0 MHz](S/N 20 dB)[at 162/216/270 kHz]
Signal to noise ratio:More than 57 dB (mono)Signal to noise ratio:More than 37 dB
More than 57 dB (stereo) (INPUT 74 dB)[at 162/216/270 kHz]
[at 87.5/98.0/108.0 MHz]Distortion:Less than 1.5%
Distortion:Less than 1.5% (mono)[at 216 kHz]
Less than 2.0% (stereo)
[at 98.0 MHz]
Stereo separation:More than 22 dB
<DECK SECTION>
[at 98.0 MHz]
IF Frequency:10.7 MHzTape speed:2955 ~ 3090Hz (TTA-100)
Wow & flutter:Less than 0.35% (R.M.S)
<MW SECTION>Max Output level:more than 9 V (TTA-210)
Sensitivity:Less than 35 dB?VDistortion (PB):Less than 2.0% (TTA-210)
(S/N 20 dB)[at 603/999/1404 kHz]Noise level:Less than 100 mV (at 120 ?s, Vol Max)
Signal to noise ratio:More than 42 dBSignal to noise ratio:More than 48 dB
(INPUT 74 dB)[at 603/999/1404 kHz]
Distortion:Less than 1.5%
[at 999 kHz]
IF Frequency:450 kHz
1516 |
ACEC
