Akai LM-H30CJSA, Руководство по обслуживанию

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9.2 Tuner Board Circuit
Refer to Tuner Board circuit diagrams of PWB-0564 in Chapter 10.3.
UT01 (Tuner-FQ1216ME/MK3) is a multi-standard TV tuner for CCIR B/G, D/K, I,
L/L’ system and the front-end has a built-in digitally (I
2
C) PLL tuning system . The
Output of Composite Video from QT01 #Emitter fed with Tuner UT01 is applied to
SAA7118 through PT01 #23
、
24(Golden Finger) , wire P030A and socket P030 #1 on
Main Board.
AF and SIF sound from UT01 (Tuner) are applied to Audio Processor I044
( MSP3410) #47
、
#50 through Golden Finger PT01 #27
，
28
、
#25
，
26 and P019 #15, #17on
Main Board. The specifications of Tuner are as follows :
Intermediate Frequencies
System L L’ B/G D/K I
Picture Carrier 38.90 33.95 38.90 38.90 38.90
Colour 34.47 38.38 34.47 34.47 34.47
Sound 1 32.40 40.40 33.40 32.40 32.90
Sound 2 - - 33.16 - -
NICAM 33.05 39.80 33.05 33.05 32.348
Channel Coverage
BAND Frequency (MHz)
Low Band 48.25 to 160.00MHz
Mis Band 160.00 to 442.00 MHz
High Band 442.00 to 863.25 MHz
PINNING
SYMBOL PIN DESCRIPTION
N.C. 1 (AGC Monitor) Do not connect *
N.C. 2 (Tuning Voltage Monitor ) Do not connect
+5V 3 Supply Voltage Vb , tuner section.
SCL 4 I
2
C – serial Clock
SDA 5 I
2
C – serial Data
AS 6 I
2
C – Address Select
- X
- X
N.C. 9 Not connected
N.C. 10 Not connected
2
nd
IF Sound 11 Second IF sound output
CVBS 12 Composite Video Baseband Signal
+5V , IF 13 Supply Voltage , IF section
AF O/P (TV) 14 AF sound output
Ground Mounting Tags
-30-