Haier TDVCF2016, Service Manual

Page: 39 / 46

Color Television Model
：
20S62(TDVCF2016)
Tuner U101 outputs the IF signal and U102 is the SAWF.
After U102, the IF signal is send to P78 and P79 of LA76834.
LA76834 outputs the television signal at P56. After ceramic trap X4.5M, the CVBS signal of TV mode is formed.
The CVBS signal is send to P43(TV in) of MM1492.
MM1492 is controlled by M37762 through IIC bus. At TV mode, MM1492 obtains TV CVBS signal at P43 and outputs the
TV CVBS signal at P37(TV out).
The CVBS signal is send to P12 of TDA9183P.
After decoding, TDA9183P will send out the Y signal at P14 to P52 of LA76834 and C signal at P16 to P54 of LA76834.
(IF there are not TDA9183P, the CVBS signal is send to P52 of LA76834 directly. At the same time, the data in I703
should be changed. The comparison of with and without TDA9183P is as follows )
descr
iption posi
tion
material model with TDA9183P without TDA9183P
comb
filte
I502 IC TDA9183P Yes No
L551 inductance LGA0203-10 µ H-K-T52 Yes No
L552 inductance LGA0203-10 µ H-K-T52 Yes No
C551 capacitor chip 0603F103M500NT Yes No
VCC
C552
electrolytic
capacitor
CD110X-16V-10 µ F-M-F05 Yes No
R554 resistor chip
RS-0603-1/16W-47k Ω
-J-E Yes No
H-SYNC R551 resistor RT13-1/6W-1K
Ω
-J-T52 Yes No
R552 resistor chip
RS-0603-1/16W-2.7K Ω
-J-E Yes No
C553 capacitor chip 0603CG104J500NT Yes No
J017 jumper φ 0.58mm/7.5mm Yes No
fsc
R553 resistor chip
RS-0603-1/16W-10k Ω
-J-E
Yes No
C554 capacitor chip 0603F103M500NT Yes
resistor chip
(RS-0603-1/16W-0
Ω -J-E)
No
add one jumper between
P12 and P14 of I502.
C555
electrolytic
capacitor CD110X-50V-0.47 µ
F-M-F05
Yes,direction
is the same as
PCB board. Yes
，
direction is
opposite with the
PCB board.
CVBS
C556
electrolytic
capacitor CD110X-50V-0.47 µ
F-M-F05 Yes No
color
carrier C527 capacitor chip 39PF 30PF
MAIN IC 18 11000000 10000000/1->0 : C.Ext service
mode
data
MAIN IC 14 10000011
10000001/1->0 : Filter
Sys.
LA76834 outputs H.SYNC signal at P37 and V.SYNC signal at P36. M37762 receives the SYNC signal and according to
the signal, it sends out RGB signal of OSD at P64\63\62 to P12\13\14 of LA76834.
LA76834 will mix the picture RGB and OSD RGB together and then sends out RGB signal at P17\18\19.
H.DRIVE signal is send out at P30 of LA76834.
V.DRIVE signal is send out at P26 of LA76834.
LA76834 sends out SIF(second sound IF) signal at P67. At the same time, it will get the SIF signal in itself.
LA76834 outputs the mono sound signal at P75.
The signal is connected to P42/43 of MM1492.
4054