Teac EU3242ST, Service Manual

Page: 9 / 109

5
AK45 Service Manual 01/12/2003
K9356M:
Standard
B/G, D/K, I, L
Features
TV IF audio filter with pass band for sound carriers at 32,40 MHz (D/K, L), 32,90 MHz (I) and 33,40 MHz
(B/G)
Terminal and Pin configuration are the same with
K3953M
K9656M:
Standard
B/G, D/K, I, L/L’
Features
TV IF audio filter with two channels
Channel 1 (L’) with one pass band for sound carriers at 40,40 MHz (L’) and 39,75 MHz (L’- NICAM)
Channel 2 (B/G, D/K, L, I) with one pass band for sound carriers between 32,35 MHz and 33,40 MHz
Terminal and Pin configuration are the same with
K3953M
13.IC DESCRIPTIONS
LM317T TDA1308T
MSP3410G VDP3130Y
TEA6415 STV9379FA
TDA7269A LM7805/LM7808
24C08 SDA55XX
MC44608 TCET1102G
TDA9885T
13.1.LM317T
13.1.1.Description
The LM317T is an adjustable 3 terminal positive voltage regulator capable of supplying in excess of 1.5
amps over an output range of 1.25 to 37 volts. This voltage regulator is exceptionally easy to use and
requires only two external resistors to set the output voltage. Further, it employs internal current limiting,
thermal shutdown and safe area compensation, making it essentially blow–out proof. The LM317
serves a wide variety of applications including local, on card regulation. This device can also be used to
make a programmable output regulator, or by connecting a fixed resistor between the adjustment and
output, the LM317 can be used as a precision current regulator.
13.1.2.Features
• Output Current in Excess of 1.5 A
• Output Adjustable between 1.2 V and 37 V
• Internal Thermal Overload Protection
• Internal Short Circuit Current Limiting Constant with Temperature
• Output Transistor Safe–Area Compensation
• Floating Operation for High Voltage Applications
• Available in Surface Mount D
2
PAK, and Standard 3–Lead Transistor Package
• Eliminates Stocking many Fixed Voltages
13.2.TDA1308T
13.2.1.General Description
The TDA1308 is an integrated class AB stereo headphone driver contained in an SO8 or a DIP8 plastic
package. The device is fabricated in a 1 mm CMOS process and has been primarily developed for
portable digital audio applications. It gets its input from two analog audio outputs (DACA_L and
DACA_R) of MSP 34x0G. The gain of the output is adjustable by the feedback resistor between the
inputs and outputs.
13.2.2.Features
• Wide temperature range
•
No switch ON/OFF clicks
•
Excellent power supply ripple rejection