(1) General-----------------------------------------------------------------------------1
(2) Frame Chart-------------------------------------------------------------------fig.1
(3) IC Function Introduction ------------------------------------------------------1
(5) IC Voltage --------------------------------------------------------------8
(6) Trouble shorting------------------------------------------------------------------9
This chassis is consists of main IC TMPA8859, TA1343N, TC90L01N. TMPA8859 is an
integrated circuit for a PAL/NTSC TV. A MCU and a TV signal processor (SP) are integraed in a 64-pin
shrink DIP package. The MCU contains 8-bit CPU,ROM,RAM,I/O ports,timer/counters, A/D
converters,an on-screen display controller,remoter control interfaces,IIC bus interfaces. The TV signal
processor contains PIF,SIF,Video,multi-standard chroma,Sync,RGB processors.
(2) Frame Chart (see fig.1)
L
→
TUNER
AV/TV SWITCH
AUDIO PRO.
AUDIO POWER
R
PIF/SIF R, G, B
TMPA 8859
OSCILLLLATION
CRT
VT/BL BH/RF AGC
V-OUT
DPC CIRCUIT
H-OUT
2SD2539
SCAN
TRANSFORMER
+130V +22V +27V
∽ 110- 220V +13
ON/OFF POWER
STR-G9656
fig.1
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Icon
PIN
Description
SDA2
1
IIC bus serial data input/output
KEY
3
Key input
DVSS
4
GND connection
XOUT
6
8 MHz oscillator connection
XIN
7
8 MHz oscillator connection
DVDD
9
5V power supply
VVSS
10
GND connection
FBP IN
12
Input terminal for FBP
H.OUT
13
Horizontal driving pulse output
V.SAW
15
Terminal to be connected capacitor to generate V saw signal
V.OUT
16
Vertical driving pulse output
Ys
18
Ys IN
Cb in
19
Input terminal for Cb signal
Y in
20
Input terminal for Y signal
Cr in
21
Input terminal for Cr signal
DIG GND
22
GND terminal for Digital block
C in
23
Input terminal for Chroma signal
V2 in
24
Input terminal for Video signal
DIG Vdd
25
Vcc terminal for Digital block
CW out
26
Output terminal for fsc wave signal
EW out
28
Output terminal for east-west correction singal
IF Vvv(9V)
29
Vcc terminal for IF circuit
SIF out
31
Detected SIF signal output terminal
EHT in
32
DC NF
34
Terminal to be connected capacitor for DC Negative feedback
PIF PLL
35
Loop filter for PIF PLL connection
REG FIL
37
Terminal to be connected capacitor for stabilizing internal bias
DE-EMP
38
Terminal to be connected capacitor for SIF Det De-Emphasis
(3) IC Function Introduction
3.1 N501 TMPA8859 Function: MCU and SP
X-RAY 2 X-ray Output
RESET 5 Reset signal input
TEST 8 GND connection
TV GND 11 GND terminal for Analog block
H.AFC1 14 H AFC filter connection
H.Vcc(9V) 17 Vcc terminal for DEF circuit
ABCL in 27 Input terminal for ABL/ACL control
TV out 30 Detected PIF signal output terminal
H.C0TT in 33
IF Vvv(5V) 36 Vcc terminal for IF circuit
IF AGC 39 IF AGC filter connection
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IF GND
40
GND terminal for IF circuit
IF IN
41
Input terminals for IF signals
IF IN 42 Input terminals for IF signals
RF AGC
43
RF AGC control level output
YC Vcc
44
Vcc terminal for Y/C circuit
Black DET
46
Terminal to be connected with Black Det filter for black stretch
APC Filter
47
Terminal to be connected with APC filter for Chroma demodulation
RGB Vcc
49
Vcc terminal for RGB circuit
R OUT
50
Output terminal for R signal
B OUT
52
Output terminal for B signal
TV GND
53
GND terminal for Analog block
A VDD
55
5V power supply
MUTE
56
SCL1
58
IIC bus serial clock input
PWM
59
SCL2
61
IIC bus serial clock input
SYNC
62
Horizontal sync signal input
REMOTE
63
Remote controller signal input
POWER
64
Power control (On=Hi. Off=L)
Name
Pin
Function
Lin TV
1
This pin is for input a left audio signal form the main demodulator in the TV
Vin TV
2
This pin is for input a composite video signal form the main demodulator in the TV
Rin TV
3
This pin is for input a right audio signal form the main demodulator in the TV
LinV1
5
This pin is for input a left audio signal from an external source(V1 channel)
CinS1
6
This pin is for input a chroma signal from an external source(S1 channel)
RinV1
7
This pin is for input a right audio signal from an external source(V1 channel)
VinV2
8
This pin is for input a composite video signal from an external source(V2 channel)
LinV2
9
This pin is for input a left audio signal from an external source(V2 channel)
ALC
10
This is an detect output pin of ALC(Auto Level Control)
RinV2
11
This pin is for input a right audio signal from an external source(V2 channel)
Vcc
12
This is the power supply pin. Apply 9V to this pin.
SDA
13
This is an IIC bus data input/output pin.
SCL
14
This is an IIC bus clock input pin.
Vsm out 45 Output terminal for Vsm signal
IK IN 48 Sense ACB cathode current input
G OUT 51 Output terminal for G signal
A GND 54 GND connection
SDA1 57 IIC bus serial data input/output
LED 60
3.2 N001 TC90L01N Function: I2C bus control , Audio/Video switching IC
V/Yin V1 4 This pin is for input a luminance signal or composite video signal from an external
source(V1 channel)
GND 15 This is the GND pin.
Rout TV 16 This pin is for output right audio signal.
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Lout TV
17
This pin is for output left audio signal.
Yout
18
This pin is for output luminance signal.
BAND2
19
This pin is for output band2 to control tuner.
Cout
20
This pin is for output chroma signal.
BAND1
21
This pin is for output band1 to control tuner.
Vout
22
This pin is for output main channel composite video signal.
Rout Mon
23
This pin is for monitor-output right audio signal.
Lout Mon
24
This pin is for monitor-output left audio signal.
PIN
FUNCTION
1
Inverting input
2
Supply voltage
3
Flyback generator
4
Ground
Name
Pin
Function
Offset canceling filter
1
DC offset canceling filter for bass boost.
2-5
Terminals for capacitors of the phase shift blocks.
Lch input
6
Audio input terminal.
GND
7
GND terminal.
Wch output
12
Woofer audio output terminal.
Rch output
13
Right audio output terminal.
Treble HPF(L)
14
HPF for treble control circuits.
Bass LPF(L)
15
LPF for bass control circuits.
Lch output
16
Left audio output terminal.
Woofer LPF1
17
LPF for bass boost circuit.
Woofer LPF2
18
LPF for bass boost circuit.
Woofer LPF3
19
LPF for bass boost circuit.
Vcc
20
This is the power supply pin. Apply 9V to this pin.
Rch input 8 Audio input terminal.
Bias filter 9 Filter for noise rejection of the bias.
Bass LPF(R) 10 LPF for bass control circuits.
Treble HPF(R) 11 HPF for treble control circuits.
V-scan output
Volume filter 21 Smoothing filter for volume control
Woofer LPF 22 Smoothing filter for bass boost control
SCL 23 This is an IIC bus clock input pin.
Press “D” button on the factory remote control to enter the “D” mode, the letter “D” will be
displayed at the upper right coner and the adjusting items will be displayed at the upper left conrer.
Press the channel +/- to select the preferred item; press the volume +/- to adjust the value of each item.
4.2 Item introduction
TMPA8859 BUS DATA
8 S D1 COLC NTSC SUB COLOR CEN
9 S D1 TNTC SUB TINT CEN
10 S D1 COLP PAL SUB COLOR CEN(difference)
7F
50
40
40
00
40
07
0D
30
02
20
30
3F
5
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19
D1
COLN
SUB COLOR MIN
00
20
D1
TNTX
SUB TINT MAX
21
D1
TNTN
SUB TINT MIN
22
D1
ST3
NTSC SHARP CEN (TV)
23
D1
SV3
NTSC SHARP CEN (AV)
24
D1
ST4
OTHER SHARP CEN (TV)
25
D1
SV4
OTHER SHARP CEN (AV)
26
D1
SVD
SHARP CENTER in DVD
31
D1
RGCN
UV COLOR MIN
32
D1
ABL
ABL data
33
D1
DCBS
A part of video data
34
D1
CLTM
The data when TV mode
35
D1
CLVO
The data when AV mode
36
D1
CLVD
The data when DVD mode
37
D1
DEF
38
D1
AKB
39
D1
R SNS
R SENSE
43
S
D1
VP50
50Hz V-position
04 44
S
D1
HIT
60Hz Vertical size
15 45
D1
HPS
50Hz H-position(D)
02 46
D1
VP60
60Hz Vertical phase
02 47
D1
HITS
50Hz Vertical size
FF 48
S
D1
VLIN
60Hz V-LINEARITY
0F 49
D1
VSC
V-S CORRECTION
07 50
D1
VLIS
50Hz V-LINEARITY(D)
FF 51
D1
DPC
60Hz E-W PARABOLA
0C 52
D1
DPCS
50Hz E-W PARABOLA(dif)
00
56
D1
WIDS
50Hz PICTURE WIDTH(dif)
00 57
D1
CNRT
EW cornet corr
08 58
D1
CNRB
EW cornet corr
09 59
D1
VEHT
V-COMPENSATI
60
D1
HEHT
H-COMPENSATI
61
D1
VSS
Shift data of 50Hz/60Hz
00 62
D1
BRTS
SUB BRIGHT(D)
63
S
D1
RAGC
RF AGC
28 64
D1
HAFC
HAFC GAIN
3F
3F
28
28
28
28
28
27 D1 ASSH ASYMMETRY-SHARPNESS
28 D1 SHPX SUB SHARP MAX(difference)
29 D1 SHPN SUB SHARP MIN(difference)
30 D1 TXCX UV COLOR MAX
General, these failures are produced by power sources, because of which refer to a wider area, so that can
be divided them two conditions to explain: no B1 130 V and existing B1 130V.
(1) No B1 (130 V) voltage (voltage of network 220 V ac)
These failures may be caused by power supply switch.
0V
Check voltage+B
0V
at
condition of
short-circuit?
Check C809(+) voltage
300V
Check N804(5)
voltage
Y
parts of
failure
Check R812 N804
Check V708 b voltage
(2) Existing B1 130 V
These failures may be caused by abnormal operation of horizontal scan, to confirm which can
observe the filament of tube whether bright on. If determined horizontal scan in abnormal operation, look
Check N501
VD851 VD852 C851
C861 C863 C855
for the failure start from the horizontal drive stage. Search upward to TMPA8859 with method of
checking DC voltage and waveform according to sequence: PIN13/H.OUT port→ PIN17 power supply→
V707/9V output.
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Check voltage at 13
Check V707 V706
Check VD852
heck V401 T401
Check N501
Abnormal
Vin waveform at
Check N501
Check circuit between
Check N001
Whenever open or
interconnect on the bus from
PROM and main
15V
0
Check N803 N501 G701
N
Y
N
Check (15V)
voltage
Check voltage at 17 pin of
TMPA8859 =9 V
Y
pin of TMPA8859
=1.9 V
V705
6.2 Existing grating and no picture
Check the voltage of PIN29
36 44 49 of N501
Check OSD on screen
Y
C
T402
N
Normal
Check V2in waveform
existed at PIN24 of N501
Check N801 N802
Y
Check T
N001/PIN2
N
NY
PIN41~PIN42 of N501
* :
CPU to E
chip, no picture can occur.
2
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6.3 Existing grating and picture, no sound
Check loudspeaker
pin2
Check waveform
Check N602
When searching automatically channels,
Check VT voltage of
Check N501
Check SYNC waveform at
Check 33 V of
Check voltage at PIN9 54 of N501 =5V
Check voltage at
Check N701 G701
Check V701 VD701
Check N602
V603 V604
Check waveform
Y
Y
N
V605 C601
Y
Abnormal
Check waveform at
4 of N602
Y
R880
6.4 Cannot save channels
Check the audio signal of + pins of
two loudspeaker
N
at pin5 7 of N601
at pin1 3 of N001
Check N001
Normal
N
Check N501
Y
Check SYNC waveform
at N501/PIN62
Y
V703 V704 N001/PIN22
6.5 CPU non-operating
N
Check N803
VD852
observe whether can display picture
N
Y
Y
Check tuner
N501/PIN5(RESET)=5V
TUNER=0--30 V
CheckN501 V702
Y
N
voltage
N
Check R863 and VD713
N
N
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Circuit Diagram of TMPA8829-E-KD Color TV Receiver