22
28JW-74H
TDA9885 (IC201)
Notes
1. Values of video and sound parameters can be decreased at V
P
= 4.5 V.
2. For applications without I
2
C-bus, the time constant (R
×
C) at the supply must be >1.2
µ
s (e.g. 1
Ω
and 2.2
µ
F).
3. Condition: luminance range (5 steps) from 0% to 100%.
4. AC load: C
L
< 20 pF and R
L
> 1 k
Ω
. The sound carrier frequencies (depending on the TV standard) are attenuated
by the integrated sound carrier traps (see Figs 13 to 18;
H (s)
is the absolute value of transfer function).
5. S/N
W(video)
is the ratio of the black-to-white amplitude to the black level noise voltage (RMS value measured on
pin CVBS). B = 5 MHz weighted in accordance with
“CCIR 567”.
6. Conditions: video signal, grey level, positive and negative modulation.
7. The intercarrier output signal at pin SIOMAD can be calculated by the following formula taking into account the
internal video signal with 1.1 V (p-p) as a reference:
(RMS), where:
is the correction term for RMS value,
is the sound-to-picture carrier ratio at pins VIF1 and VIF2 in dB, 6 dB is the correction term of internal
circuitry and
±
3 dB is the tolerance of video output and intercarrier output V
o(intc)(rms)
.
8. Pin REF is able to operate as a 1-pin crystal oscillator input as well as an external reference signal input, e.g. from
the tuning system.
B
AF(
−
3dB)
−
3 dB AF bandwidth
without de-emphasis;
dependent on FM-PLL filter
80
100
−
kHz
S/N
W(AF)
weighted signal-to-noise ratio of
audio signal
FM: 27 kHz FM deviation;
50
µ
s de-emphasis;
vision carrier unmodulated
52
56
−
dB
AM: m = 54%
45
50
−
dB
α
AM(sup)
AM suppression of
FM demodulator
50
µ
s de-emphasis;
AM: f = 1 kHz and m = 54%;
referenced to 27 kHz
FM deviation
40
46
−
dB
PSRR
AUD
power supply ripple rejection on
pin AUD
f
ripple
= 70 Hz; see Fig.6
for AM
20
26
−
dB
for FM
14
20
−
dB
V
o(intc)(rms)
IF intercarrier output level
(RMS value)
QSS mode; SC
1
; SC
2
off
90
140
180
mV
L standard;
without modulation
90
140
180
mV
intercarrier mode;
SC
1
; SC
2
off; note 7
−
−
−
mV
Reference frequency
f
ref
reference signal frequency
note 8
−
4
−
MHz
V
ref(rms)
reference signal voltage
(RMS value)
operation as input terminal
80
−
400
mV
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
V
o(intc)
1.1 V (p-p)
1
2 2
-----------
×
10
V
i SC
(
)
V
i PC
(
)
--------------- dB
(
)
6 dB
3 dB
±
+
20
----------------------------------------------------------------
×
=
1
2 2
-----------
V
i SC
(
)
V
i PC
(
)
--------------- dB
(
)
Summary of Contents for 28JW-74H
Page 19: ...19 28JW 74H CHASSIS LAYOUT PWB A Mother Unit FB217N2 ...
Page 39: ...39 28JW 74H SCHEMATIC DIAGRAM OF CRT UNIT FB218N2 1 I H G F E D C B A 2 3 4 5 6 7 ...
Page 40: ...40 28JW 74H SCHEMATIC DIAGRAM OF MAIN 1 FB217N2 1 I H G F E D C B A 2 3 4 5 6 7 Page 41 ...
Page 41: ...41 28JW 74H 8 9 10 11 12 13 14 I H G F E D C B A Page 40 SCHEMATIC DIAGRAM OF MAIN 1 FB217N2 ...
Page 42: ...42 28JW 74H SCHEMATIC DIAGRAM OF MAIN 2 FB217N2 1 I H G F E D C B A 2 3 4 5 6 7 Page 43 ...
Page 43: ...43 28JW 74H 8 9 10 11 12 13 14 I H G F E D C B A Page 42 SCHEMATIC DIAGRAM OF MAIN 2 FB217N2 ...
Page 44: ...44 28JW 74H SCHEMATIC DIAGRAM OF MAIN 3 FB217N2 1 I H G F E D C B A 2 3 4 5 6 7 Page 45 ...
Page 45: ...45 28JW 74H 8 9 10 11 12 13 14 I H G F E D C B A Page 44 SCHEMATIC DIAGRAM OF MAIN 3 FB217N2 ...
Page 46: ...46 28JW 74H SCHEMATIC DIAGRAM OF MAIN 4 FB217N2 1 I H G F E D C B A 2 3 4 5 6 7 Page 47 ...
Page 47: ...47 28JW 74H 8 9 10 11 12 13 14 I H G F E D C B A Page 46 SCHEMATIC DIAGRAM OF MAIN 4 FB217N2 ...
Page 48: ...48 28JW 74H SCHEMATIC DIAGRAM OF CONTROL UNIT FB219N1 1 I H G F E D C B A 2 3 4 5 ...
Page 49: ...49 28JW 74H 01 2 01 01 2 2 3 4 3 3 5 3 67 3 2 01 3 4 8 98 3 4 2 01 6 7 TROUBLESHOOTING TABLES ...
Page 51: ...51 28JW 74H 4 4 4 4 3 3 C 4 3 4 D 4 3 4 3 3 4 ...
Page 62: ...62 28JW 74H Notes ...
Page 63: ...63 28JW 74H Notes ...
