Toshiba SD-2550A Service Manual page 81

5-3. Main Circuit Diagrams
5-3-1. New Main ICs Information
ZR36732
81
80
41
120
40
121
160 1
TMP94C251AF(Z)
73 72
108 37
109 36
144
1
TMP86CK74AFG
41 40
25
64
24
65
1
80
MM1567AJBE
18
34
17
1
BA5813FM-E2
15
14
28
1
AD1958
15
28
14
1
TA1319P/TA1319AP
5
8
4
1
MM1561KFBE
5
7
4
1
PST3545NR
4
5
3
1
HC49US27000B
2
1
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Main ICs Function
Ref. No. IC Name Function
IC601 S-24C04BFJ-TB EE-PROM
IC301 ZR36732 AV Decorder
IC401 TC94A03F SERVO & Data Processor
IC502 TA1323F RF Signal processing IC
IC503 BA5813FM-E2 Motor Driver
IC901 AD1958 DA Converter
IC605 TMP94CS251AF Main Micro Processor
IC606 MBM29F800BA-55PFTN Flash ROM
Table 3-5-2 AD1958
Pin
Name Function
No.
1 CCLK Control clock input for control data. Control
input data must be valid on the rising edge of
CCLK. CCLK may be continuous or gated.
2 CLATCH Latch input for control data. This input is
active low.
3 RESET Reset. The AD1958 is placed in reset mode
when this pin is held LO. The serial control
port registers are reset to the default
values. Connect HI for normal operation.
4 LRCLK Left/Right clock input for input data. Must
run continuously.
5 BCLK Bit clock input for input data. Need not run
continuously; may be gated or used in a
burst fashion.
6 SDATA Serial inout, MSB first,containing two
channels of 16/20/24 bits of twos
compliment data per channel.
7 DVDD Digital Power Supply Connect to digital+5V supply.
8 DGND Digital Ground
9 SCLK0 33.8688 MHZ clock output
10 SCLK1 256/384 fs output
11 SCLK2 512 fs/22.5792 MHZ output
12 MCLK 27 MHZ master clock output/256 fs DAC
clock input
13 XOUT 27 MHZ Crystal Oscillator output
14 XIN 27 MHZ Crystal Oscillator /External Clock Input
15 PVDD PLL Power Supply. Connect to PLL +5V supply.
16 PGND PLL Ground
17 LF0 PLL0 loop filter
18 LF1 PLL1 loop filter
19 AGND Analog Ground
20 OUTR Right Channel Positive line level analog output.
21 FILTR Voltage Reference Filter Capacitor
connection.Bypass and decouple the
voltage reference with parallel 10µF and
0.1µF capacitors to AGND.
22 AGND Analog Ground
23 OUTL Left Channel line level analog output
24 AVDD Analog Power Supply. Connect to
analog+5V supply.
25 FILTB Filter Capacitor connection, connect 10µF
capacitor to AGND.
26 ZERO Zero Flag output.This pin goes HI when
both channels have zero signal input for
more than 1024 LR Clock Cycles.
27 MUTE Mute. Assert HI to mute both stereo analog
outputs. Deassert LO for normal operation.
28 CDATA Serial control input, MSB first,containing 16 bits of
unsigned data per channel. Used for specifying
channel specific attenuation and mute.
Table 3-5-1
Detail
Setup default, memorization of specification setting.
Decryption, MPEG-2 Decode, Audio Decode, Sub Picture Decode,
OSD.
Performs servo control of DVD or CD, and performs demodulation
and correction of RF signal.
Equalizes playback RF signal and generates error detection signal
required for each servo operation.
Driver for motor driving.
Stereo audio DA converter.
Performs system control for all circuits.
Memorization for firmware.
Table 3-5-3 BA5813FM-E2
Pin
Name Function
No.
1 FWD Loading driver FWD input terminal
2 REV Loading driver REV input terminal
3 LDCONT Loading driver output voltage control
terminal
4 MUTE1 CH1 mute terminal
5 IN1 Driver CH1 input terminal
6 IN2 Driver CH2 input terminal1
7 PREVcc Pre driver, Loading power supply terminal
8 POWVcc12 CH1, CH2 power step power supply
terminal
9 VOL(-) Loading driver minus output
10 VOL(+) Loading driver plus output
11 VO2(-) Driver CH2 minus output
12 VO2(+) Driver CH2 plus output
13 VO1(-) Driver CH1 minus output
14 VO1(+) Driver CH1 plus output
15 VO4(+) Driver CH4 plus output
16 VO4(-) Driver CH4 minus output
17 VO3(+) Driver CH3 plus output
18 VO3(-) Driver CH3 minus output
19 GND Ground terminal
20 POWVcc34 CH3, CH4 power step power supply
terminal
21 MUTE2 CH2, CH3, CH4 mute terminal
22 IN3 Driver CH3 input terminal
23 IN4 Driver CH4 input terminal
24 RGND Regulator part ground terminal
25 REG-P Regulator output feedback terminal
26 REG-B External regulator Tr base connection
terminal
27 RVcc Regulator part power supply terminal
28 BIAS Bias input terminal
Note:Plus and minus outputs are the polarity against the Input.
(Ex. Pin 14 becomes HIGH, when pin 4 terminal voltage is
HIGH.)
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