7. CTV 2001 L01
TEA1507 PAGE 7
FEATURES
Distinctive Features
• Universal mains supply operation( 70 to 276V AC).
• High level of integration, giving a very low external
component count.
8. CTV 2001 L01
TEA1507 PAGE 8
Green features
• Valley/zero voltage switching for minimum losses
• Efficient quasi-resonant operation at high power levels
• Frequency reduction at low power standby for improved
system efficiency(<3W)
• Burst mode operation for very low standby levels(<1W)
• On-chip start-up current source
9. CTV 2001 L01
TEA1507 PAGE 9
Protection features
• Safe restart mode for system fault conditions
• Continuous mode prot. by demagnetization detection
• Accurate and adjustable overvoltage protection
• Short winding protection
• Undervoltage protection
• Overtemperature protection
• Low and adjustable overcurrent protection trip level
• Mains voltage-dependent operating-enabling level
14. CTV 2001 L01
Control pin CTRL PAGE 14
Vsense(max)voltage as function of VCO frequency as function of Vsense
VCTRL
Vctrl<1V
Vctrl>1.5V
Frequency variation
If Vctrl increases Vsense decreases-> frequency decreases
If Vctrl decreases Vsense increases-> frequency increases
If Vctrl <1V and >1.5V-> PWM regulation and fixed frequency
15. CTV 2001 L01
Valley switching PAGE 15
Start of a new cycle at
lowest drain voltage
Start of a new cycle in a classical PWM
system at high drain voltage
25. CTV 2001 L01
Tips for debugging power supply PAGE 25
No. Problem symptom Check
1) No Vbatt volt, Vaux volt Voltage on Pin 1 of 7520,
3532, 3523,7521
2) Low voltage on Stdby_con signal ( normal- Low, Stdby-
Vbatt,Vaux High),
But 3.3v is OK 7541, 7542
collector of 7561 ( normal - High, Stdby -
pulses)
3) Set automatically collector voltage of 7561, 3.3V supply,
switchoff after switch on shorting on Vaux supply.
4) No 3.3V supply Short on 3.3V
7560
6561/6562
3564
32. CTV 2001 L01
PAGE 32
EHTinfo
EWdrive
Mains Supply Horizontal
Deflection
Panorama Coil
Hflybk
Secondary
output
voltage
L
H
Vguard
BLK-IN
POWER
DOWN
EW EHTo
Correction
EW
Protection
41. CTV 2001 L01
Tips for debugging deflection PAGE 41
No. Problem symptom Check
1) Set cannot start-up & Isolate 5561 & check Vbatt is correct now (Power
Vbatt volt not correct Supply ok) – check for 7460, 6460, 6461 failure.
Check MainAux and VlotAux +13V (6467) are
correct for base drive of deflection – check for
7461, 7463 & 7460 failure.
2) Incorrect pic. width or Isolate 5400 & check EW_protection is now not
EW trigger – check for 7400, 2401, 2404 failure.
Protection trigger
3) No Check secundary voltage supply – 3494, 3488,
+200V,+50V,+13V,+8V,+5 6486, 7480, 7482.
V supply
4) Single horizontal line No vertical deflection – check 7471 Frame IC,
VlotAux+13V failure.
5) Flyback line visible on Check 7330 Video amplifier, +200V supply failure.
screen
43. CTV 2001 L01
Video Signal Processing PAGE 43
Video Signal Processing
44. CTV 2001 L01
PAGE 44
General description
Combined the function of :
video processor + Micro-controller.
Basically divided in 4 main function :
1) Microcontroller
2) Video / Audio Demodulator TDA955x/6x/7x/8x
3) I/O Switching
4) SYNC Separator
46. CTV 2001 L01
Tuner and IF QSS PAGE 46
UOC Sound
Processing
FM
Sound QSS_AM_DEM_OUT
Sound IF QSS Sound IF
Tuner Saw Filter
Visiion Vision IF IF Video output
Vision IF
Saw Filter
Tuner AGC
Sound
Trap
SEL_IFPLL/Mtrap
uP
I2C
Video Int CVBS
Processing
48. CTV 2001 L01
Video Processing PAGE 48
Radio
TV-Tuner
UOC
UOC
7200 - C
7200 - A .
Video
IF+ Ampl .Processing
UOC
I/O 7200 - D
Scart / Front Synchronisation
49. CTV 2001 L01
Tuner IF PAGE 49
Tuner 11
10
UOC Video
SAW
VIF1 = pin18
Video VIF2 = pin19
FM RADIO
A5-24
7002
UOC Sound
SAW
SIF1 = pin23
7001 SOUND SIF2 = pin24
SEL-IF-M-TRAP
54. CTV 2001 L01
Video source select PAGE 54
Scart 1 Video Out
Scart 2 Video Out
49 47
R In 51
G In 52 Video Processing R Out
56
B In 53 G Out
57
B Out
UOC
FBL In 50
58
HEF4053BT
Front/Side Video In Scart 1 Video In 42
5
4
Scart 2 Video In 44
3 38
1 2 54 40
9/10/11
Status 1 RF Video
Status 2
SEL-Main_Frnt_RR
EHT Info BCL Circuit Sound Trap
65. CTV 2001 L01
Functionality TXT/OSD PAGE 65
CVBS Internal 40
42
UOC
SCART1
SCART2 4
7200B
4
H 31 R
56
V
V
57
TXT OSD
B
58
55 BC Info/Protection
66. CTV 2001 L01
UOC interface with power supply PAGE 66
+3.3 V
POWER SUPPLY 61
BLOCK Power_down
A. C. Mains 69
UOC
WITH TEA 1507
Stdby_con
CONTROL IC 6
67. CTV 2001 L01
A7 Conrol PAGE 67
Power Dow
Service Default
Status1 Status2
E/W PROT.
Scart Scart 1 Input Scart 2 Input
Pin 8 Level
1.82V to 2.6V 4:3 Aspect Ratio 4:3 Aspect Ratio
0.845V to 1.56V 16:9 Aspect Ratio 16:9 Aspect Ratio
0V to 0.65V No Switching No Switching
68. CTV 2001 L01
Standby status UOC PAGE 68
Put Standby Con
Put STB to low PG LOW
To Low
Enable Wait for 550 ms Mute Audio
INTERRUPT
Put UOC in
Wait for 180ms Put STB to low
standby
Put UOC out of
Disable interrupt
Standby
Put Standby Con
Set STB to high
To High
69. CTV 2001 L01
Power ON-Standby-Power On-Power Off PAGE 69
Standby key press Out of Standby key press
Power ON Standby Power ON Power off
3.3V
180ms >3ms
STB bit
Mute Audio Mute Audio
Enable
Interrupt status Disable
550ms
Out of Stdby
UOC Status
Stdby
Power down
Stdby_con
70. CTV 2001 L01
Power ON-Standby-Power OFF-Power ON PAGE 70
Power ON Standby Power OFF Power ON
Standby key press
3.3V
Mute Audio
STB bit
Enable
Interrupt
status Disable
Out of stdby
UOC
status Stdby
550ms
Power down
Stdby-con
71. CTV 2001 L01
Power ON - Fault condition PAGE 71
SEQUENCE OF OPERATIONS : POWER ON - FAULT CONDITION (OVER CURRENT BY V aux.)
Burst mode with
Power ON
Fault condition LOT shut down
(Audio Over current)
3.3V
STB bit
Enable
Interrupt
status Disable
Out of stdby
UOC
status Stdby
Power down
Stdby-con
72. CTV 2001 L01
Tips for debugging µP PAGE 72
1. Check that both +3.3V DC and +3.9V DC are present.
2. Check that crystal oscillator is working.
3. Check keyboard protection pin that it is in high logic. For sets with EW control,
make sure that base of 7606 is low.
4. Check that Power Good signal is at high logic, normal operation.
5. Check that UOC is not in standby mode. Pin 6 of UOC should be 0V DC.
6. Make sure H-drive pulse is there. This can be check from resistor 3251. If H-
drive is does not exist, remove resistor 3251 to check if there is loading.
95. CTV 2001 L01
PAGE 95
Error Code 0
A “0” in a buffer means an error has not been detected.
L01US0 1.0 SDM
ERR 0 0 0 0 0
Contents of last 5 detected errors
96. CTV 2001 L01
PAGE 96
Operation hours timer L011US1version S A M indication
99999 Software 1.0 SAM
ERR Contents of last 5 detected errors
0 0 0 0 0
XXX XXX XXX XXXByte Value
OB(n) - Option XXX XXX XXX
Clear Clear Error Buffer Clear?
Options
AKB 0
Tuner
White Tone
Geometry
Audio
97. CTV 2001 L01
PAGE 97
Item
Item D es crip tio nn
D es crip tio
IF P LL L
IF P L D efau lt valu ee==24 (d oonn o talig nn )
D efau lt valu 24 (d o t alig )
A FF W
AW A FF Cw in dd ow
A C w in ow
AGC
AGC D efau lt valu ee==28 (d oonn o talig nn )
D efau lt valu 28 (d o t alig )
S LL
S O nn/ /O ff
O O ff
YD
YD D efau lt valu ee==33(d oonn o talig nn )
D efau lt valu (d o t alig )
C LL
C D efau lt valu ee==44(d oonn o talig nn )
D efau lt valu (d o t alig )
A FF A
AA N oo tselectab le
N t selectab le
A FF B
AB N oo tselectab le
N t selectab le
98. CTV 2001 L01
PAGE 98
White Tone Normal NORMAL RED
NORMAL GREEN
NORMAL BLUE
Cool DELTA COOL RED
DELTA COOL GREEN
DELTA COOL BLUE
Warm DELTA WARM RED
DELTA WARM GREEN
DELTA WARM BLUE