Toshiba 29VH27D, Service Manual

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23
18 CVBS OUT AVDD_DAC X CVBS Output
19 REF_SW IN AVDD_DAC X Reference frequency switch
20 SIF OUT AVDD_DAC X 2
nd
SIF output
21 AVDD_DAC X DAC supply (+5V)
22 AVSS_DAC X DAC ground
23 TEST_EN IN DVDD GND Test enable
24 RESETQ IN DVDD X Reset
25 I2C_SDC I/O DVDD X I
2
C data
26 I2C_SCL I/O DVDD X I
2
C clock
27 DVDD_CAP X Digital supply capacitor
28 DVDD X Digital supply (+3.3V)
29 DVSS X Digital ground
30 DVSS_CAP X Digital capacitor ground
31 PORT0 OUT DVDD LV Digital output port
32 PORT1 OUT DVDD LV Digital output port
33 TUNER_AGC OUT DVDD X Tuner AGC current output
34 PORT2 OUT DVDD LV Digital output port
35 PORT3 OUT DVDD LV Digital output port
36 PORT4 OUT DVDD LV Digital output port
37 ADR_SEL IN DVDD X Address select
38 PORT5 OUT DVDD LV Digital output port
39 DVDD_ADC X Digital supply for ADC (+3.3V)
40 DVSS_ADC X Digital ground for ADC
41 XTAL_IN IN AVDD_ADC X Crystal oscillator
42 XTAL_OUT I/O AVDD_ADC X Crystal oscillator/external reference
frequency
43 VREF AVDD_ADC X ADC Reference voltage
44 SGND AVDD_ADC X ADC Reference ground
14.16.LM7808
14.16.1.Description
The L7800 series of three-terminal positive regulators is available in TO -220 TO -220FP TO-3 and D 2
PAK packages and several fixed output voltages, making it useful in a wide range of applications.
These regulators can provide local on-card regulation, eliminating the distribution problems associated
with single point regulation. Each type employs internal current limiting, thermal shutdown and safe
area protection, making it essentially indestructible. If adequate heat sinking is provided, they can
deliver over 1A output current. Although designed primarily as fixed voltage regulators, these devices
can be used with external components to obtain adjustable voltages and currents.
14.16. 2.Features
Output Current Up To 1.5 A
Output Voltages of 5; 5.2; 6; 8; 8.5; 9; 12; 15; 18; 24V
Thermal Over load protection
Short Circuit Protection
Output Transition SOA Protection
14.17.BDX53BFI
14.17.1.Description
The BDX53BFI is silicon epitaxial-base NPN power transistor in monolithic Darlington configuration and
are mounted in ISOWATT220 plastic package. It is intended for use in hammer drivers, audio amplifiers
and other medium power linear and switching applications. The complementary PNP type is the
BDX54BFI.
14.17.2.Applications
General purpose switching and amplifier
Linear and switching industrial equipment