Philips L05HD Schematic
PHILIPS TECHNICAL TRAINING
L05HD TRAINING MANUAL
PHILIPS CONSUMER ELECTRONICS
64 PERIMETER CENTER EAST
PO BOX 467300
ATLANTA, GA 31146-7300
MM032205
TABLE OF CONTENTS
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
POWER SUPPLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
AUXILIARY POWER SUPPLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
MAIN POWER SUPPLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
DEFLECTION SYNC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
TV SIGNAL PROCESSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
DEFLECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
VIDEO SIGNAL FLOW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
CRT DRIVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
AUDIO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
SIDE JACK PANEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
TROUBLESHOOTING TO PANEL LEVEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Introduction
The L05HD TV chassis is designed for the model year 2005. This set is High Definition ready
with an NTSC tuning system. To receive the ATSC channels a set top box is required.
This design is used in large screen sizes of 27 and 30 inch with the 27-inch having a 4:3
aspect ration and the 30 inch version having a 16:9 aspect ratio. There are three types of
CRTs used which are the 100 degrees, 110 degrees, and wide screen version.
The standard architecture consists of a Main panel (called the family board), a Picture Tube
panel, a Side I/O panel, a HDMI panel, a HD panel, and a Top Control panel. The panels
consists primarily of conventional components with some surface mounted devices.
The functions for 1fH video and audio processing is performed in one IC (TDA1200xx, IC
7200), the Hercules chip. This chip is located on the solder side of the main panel.
The functions for the HD signals and 1fH to 2fH conversion is performed on the HD panel.
Except for switching, OSD, Closed Caption, Text, and A/D conversion, the bulk of the processing is performed by the Trident chip, IC 7201.
The L05HD chassis has two signal processing sections, one for the 1fH (NTSC), and one for
2fH (HD) processing. Whatever signal is applied to the set, it is displayed on the CRT in a
1080i format.
The NTSC tuning system features 181 channels with on-screen display. The main tuning
system uses a tuner, a microcomputer, and a memory IC mounted on the main panel. The
microcomputer communicates with the memory IC, Remote Receiver, Tuner, Signal processing IC, and HD processing section. The Memory IC retains the settings for favorite stations,
customer-preferred settings, and circuit settings. The circuit settings can be accessed by the
service technician via the Service Alignment mode.
The On-screen graphics and Closed Caption decoding are done within IC 7206 located on
the HD panel. They are added to the main signal in the Display Processor, 7221, located on
the HD panel.
Customer Operation
The L05 customer menu is similar to the L04 customer menu. The L05HD does not have
Picture-in-Picture.
Press the Menu button to make a selection. Press the Cursor up-down buttons on the
remote to highlight the desired selection. Press the right Cursor button to make the selection.
Page1
Press the Menu button on the remote and press the Cursor up-down button to obtain the
following screens.
Page 2
VOL
1
3
5
6
7
2
4
Main
Picture
Sound
Features
Install
Timer
Rotation
AutoLock
Active Control
Digi. Pic. Demo
Features
Timer
Start Time
Stop Time
Channel
Activate
Display
Access Code
- - - -
AutoLock
Block Channel
Setup Code
Clear All
Block All
Movie Rating
TV Rating
Of fStop T ime
Channel
Activate
Display
Access Code
XXXX
Incorrect
New Code
- - - -
Confirm Code
XXXX
Timer
Rotation
AutoLock
Active Control
Digi. Pic. Demo
Access Code
XXXX
Features
T imer
Rotation
AutoLock
Active Control
Digi. Pic. Demo
Features
T imer
Rotation
AutoLock
Active Control
Digi. Pic. Demo
Features
T imer
Rotation
AutoLock
Active Control
Digi. Pic. Demo
Features
T imer
Rotation
AutoLock
Active Control
Digi. Pic. Demo
Features
Timer
Rotation
AutoLock
Active Control
Digi. Pic. Demo
2
4
Setting up the access code.
1. Press the Menu button on the remote
to display the on-screen menu.
2. Press the Cursor up or down buttons
until the word features are highlighted.
3. Press the Cursor right button to display
the features menu options.
4. Press the Cursor up or down buttons
until the words autolock are highlighted.
5. Press the Cursor right button. The
screen will read, “Access Code ----”
6. Using the number buttons, enter 0, 7,
1, 1. XXXX will appear as you press
the buttons.
Incorrect code will appear on the screen.
Enter 0711 again.
7. The screen will ask you to enter a new
code. Enter any 4 digit code.
Page 3
Power Supply Block (Figure 1)
The Power supplies are both located on the Family board. The supplies are divided into two
sections, the Auxiliary and Main section. A single filter and rectifier circuit supplies both
sections. The Auxiliary supply operates in a low power mode when the load is reduced. In
the standby mode, the 3.3 and 6 volt supplies are operating. The 3.3 volt supply provides
power to the processor section of the Hercules. The 6 volt supply provides power to the IR
receiver. The Main supply is switched Off via the Standby line.
When the set is turned On, the "B" line from the Hercules processor goes High switching
7547 which turns 7535, 7509, and 7545 On. The +3V3A, +6VA, +12VA, and +8VA supplies
are then switched On. The load placed on the Aux Power supply will cause it to switch to the
full power mode. At the same time, the STBY line switches Low turning the Main SMPS
supply On. The supply produces a +6 volt, +140 volt, -16 volt, and +16 volt supplies.
The +Vaudio (+16 volt) supply switches on the degauss relay.
Page 4
FIGURE 1 - POWER SUPPLY BLOCK
Auxiliary Power Supply (Figure 2)
IC 7510 is the heart of the Auxiliary Power supply. In the Standby mode, VIA the current
sensing and Control circuits, a low power condition is detected by the IC. The IC then goes
into a Burst Mode operation to reduce the power used by the circuit. In the Burst Mode, the
supply will operate at approximately 25 kHz. In full power operation the frequency will be
approximately 66 kHz.
When power is first applied to the set, Start up is supplied to the IC by the internal Start-Up
current through Pin 14. Startup voltage is also applied to the IC to Pin 2 by the AC_IN line
which is tied to the neutral side of the AC line. During normal operation, power is supplied to
the IC by the HOT windings, Pins 1 and 2, of transformer 5504. Output drive from Pin 11 is
applied to the Gate of Transistor 7525. Voltage developed across the current sensing resistors in the Source of 7525 provides current sense information to the IC. When 7525 is
switched Off, the voltage on Pin 1 of 5504 goes High. This winding supplies the operating
voltage the power supply circuit. It also turns Transistor 7567 On causing the Gate of 7525 to
stay Low as long as Pin 1 of 5504 is High. This prevents 7525 from turning On until the field
of 5504 has collapsed.
Regulation is accomplished by monitoring the +3 volt supply. This voltage is fed to Shunt
regulator 7542 which controls the current through opto-isolator 7516. Shunt Regulator 7542
begins conducting when Pin 3 of the IC reaches 2.5 volts. At this point current flows through
the opto-isolator, 7516. The transistor inside 7516 turns On applying a control voltage to Pin
6 of 7510. If a problem should develop in the feedback circuit causing an excessive voltage
on Pin 6, Transistor 7549-2 will turn On, switching Transistor 7532 On. This will a voltage to
the Demag circuit on Pin 7 causing the IC to latch Off. The IC will stay latched until power is
removed and reapplied to the set.
In the Standby mode, the "B" control line from the Hercules Processor is Low. Only the +3,
+3V3, and +6 volt supplies are present. When the set is turned On, the "B" line will go High,
turning Transistors 7509, 7545, and 7535 On. This will switch On the +8VA, +12VA, +8V,
+3V3A, +6VA, and +5V supplies.
In normal operation, voltage from Pin 12 of 5504 is rectified by 6540 to produce a negative
voltage which prevents Transistor 7561 from turning On. If AC is removed from the set, this
negative voltage will disappear. The voltage across the filter capacitors on the +3V line will
turn 7561 On. The Power Down line will then go Low signaling the processor to shut the set
down.
Page 5
COM
OUTIN
KA
REF
COM
OUTIN
Vcc
Gnd
Ctrl
START-UP
CURRENT SOURCE
VALLEY
START-UP
CURRENT SOURCE
CURRENT
SENSING
OUTPUT
DRIVER
OVER
POWER
LOGIC
CONTROL
CIRCUIT
MAXIMUM
ON-TIME
PROTECTION
VOLTAGE
CONTRLLED
OSCILLATOR
OVER
TEMPERATURE
PROTECTIOM
POWER-ON
RESET
SUPPLY
MANAGEMENT
FREQUENCY
PROTECTION
CONTROL
INPUT
CONTROL
CIRCUIT
BURST
DETECTOR
Drain
HVS
Sense
Demag
Driver
*
0V
300K
S
20V
470U
I564
0086
HEATSINK
6
A4
E
15V8
15V9
10V
1M5
A4
470U
6548
2522
470p
3599
To 1405
Of
Deflection
Controller
*
*
*
1V3
9
*
5V7
TEA1507
---
JMP
3V4
C
E
158V
C
4V5
3V4
E
0V
B
REGION
3540
27VRF-HD
---
---
*
JMP
AUXILIARY POWER SUPPLY
1V5
2
G
C
*
0V1
E
0V
B
3V4
3m3
7
3
E
0V7
E
158V
0V
*
E
0V
C
E
B
C
B
3V7
Microcontroller
B
11
*
2V5
C
9V
4m7
A4
15V8
0V6
B
6V
8V1
330K
B
15V8
To 1533 Of
Source Select +
*
*
3V2
0V
C
0V
*
E
B
2V
**
0V
*
D
A4
14
B
0V
E
C
0V
0V7
*
*
*
*
*
*
*
*
0V
B
C
10V7
B
*
C
*
0V
E
B
C
0V6
8V
C
E
9V
*
6V3
*
9530
9534
NAFTA
30WSRF-HD
---
---
---
---
SIZE
3548
3551
3566
4523
4540
4548
4551
4566
4585
5523
6553
7535
9515
9524
9529
---
---
Vaux_GND
+3V3
AUX_ON|ITV_MSG
POWER_DOWN
+8V
+12VA
Vaux_GND
Vaux_GND1
100MHZ 120R
BAS316
SI2307DS-E3
---
---
---
---
---
---
---
---
---
---
---
JMP
---
JMP
---
---100MHZ 120R
BAS316
SI2307DS-E3
---
---
---
---
---
9534
Vaux_GND1
Vaux_GND
Vaux_GND
7561
I537
3537
68K
PDTC143ZT
I594
I596
6512
BZX384-C18
68K
3546
22u
2510
F578
2591
1n0
470p
2539
3568
47K
1n0
2524
3548
68K
I536
I556
I532
Vaux_GND
3581
22K
I526
BAV21WS
6537
Vaux_GND1
2590
BC847BW
7584
F584
10n
2575
BZX384-C15
6549
BAV21WS
6532
6545
SB340L-7010
2526
100n
13
Vaux_GND1
L78L33ACZ
7544
2
10K
3593
1000mAT
1532
I558
2584 470u
2564
9509
100n
I512
68K
3540
I554
4585
I553
7535
SI2307DS
Vaux_GND
5
6
7
8
16V47u
2558
1534
1
2
3
4
Vaux_GND
F535
10K
3591
220R
3563
6540
BAS316
4566
2K2
BAW56W
3536
Vaux_GND
2586
330p
9529
BAS316
6531
BC857B
7532
I533
I545
RGP10D
6533
33K
Vaux_GND
5521
3592
IMX1
12
MainSupplyGndA
Vaux_GND
7549-2
7
8
9
HEATSINK
0088
1
10
11
12
2
3
4
5
6
12
1533
BAS316
6534
3587
2K2
2580
10n
I509
3532
I588
3529
1K2
3560
33R
BC847BW
7577
BAV21WS
6538
3538
Vaux_GND
2523
1n0
I589
6546
STPS10L60D
100n
2543
HEATSINK
0083
12
BAS316
6543
5523
4551
I538
I599
I563
I592
3528
4M7
I534
3585
68K
3535
7545
3
1
2
4R7
SI2305DS
3544
2K2
I557
9523
100n
2520
SB340L-7010
6544
7583
BC847BW
5526
IMX1
7549-1
BZX384-C12
Vaux_GND1
3594
6542
4548
22K
3586
5K6
82K
I510
3590
I547
Vaux_GND
Vaux_GND
Vaux_GND
4523
I565
3534
F577
3533
1
4
3
2
7516
TCET1103(G)
Vaux_GND1
Vaux_GND1
Vaux_GND
BZX384-C6V8
6547
3588
470K
1n0
2538
F534
7575
PDTC143ZT
2579
10n
I593
Vaux_GND1
F582
100n
2576
4540
220R3561
5527
Vaux_GND
9524
3525
47n
2521
2588
2589
2u2
Vaux_GND
1m0
2536
F537
Vaux_GND1
3562 220R
9554
4567
I539
Vaux_GND1
I568
PDTC143ZT
680R
3542
7547
470u
2587
3549
270R
Vaux_GND
Vaux_GND
BC857B
3583
5K6
7585
3596
10K
2525
470p
2585
1u0
470u
2534
16V
BAS316
6554
BAS316
6553
SARS03
6550
2578
1n0
2544
2n2
I540
Vaux_GND1
F581
I595
F585
2582
100n
3527
47K
3565
15K
2546
2u2
Vaux_GND
2557
47u 16V
Vaux_GND1
9515
7567
BC847B
Vaux_GND
3595
100K
7525
10u
2583
3539
1K0
3550
220K
7510
3547
68K
3K3
3567
Vaux_GND
F580
9
2577
100u
10
11
12
2
4
5
6
7
8
SS28411-00
5504
1
3553
27K
3543
10K
STPS10L60D
6552
56K
3530
I590
I529
2528
470n
Vaux_GND
2K2
3545
F586
I528
I531
3589
10K
Vaux_GND1
3551
4R7
1
2
3
MAINSUPPLYGND
1535
6539
SB340L-7010
7576
BC847BW
I560
2535
I597
3526
68K
3566
3597
47K
68p
2592
SI2307DS
7509
5524
10u
9536
2
1
3
3531
1K0
TL431CZ-AP
7542
Vaux_GND1
I530
BAS316
6536
3598
Vaux_GND1
Vaux_GND1
F583
2556
47u
9530
16V
2
13
2555
47u 16V
7543
L78L33ACZ
+3V
+5V
+8VA
Stdby_con
+6VA
+5V
+3V3A
+6V
+6VA
VDC
+3V3A
+8V
AC_IN
VCC
+3V3A
B
1.27V On
1.45V Off
15.5 On
11.5 Off
21 On
11.8 Off
Page 6
FIGURE 2 - AUXILIARY POWER SUPPLY
Main power supply (Figure 3)
The Main Power supply provides the VBAT (141 volt), and Audio voltage supplies. This sup-
ply is switched Off during the Standby mode. During Standby the STBY_Con line is High
which turns Transistor 7573 On. This causes the opto-isolator 7513 to turn On hard. This
places a higher voltage on the control Pin of IC 7511 causing the IC to shut down. The
operating voltage from the Auxiliary supply keeps a small voltage on Pin 2 of 7511 to prevent
it from cycling On and Off. Output from Pin 11 of 7511 drives FET 7512 which drives
Transformer 5512. When Pin 2 of 5512 goes High, Transistor 7514 is switched On turning
7512 Off. This is to prevent 5512 from becoming saturated.
When the set is turned On, the STBY_Con line goes Low switching 7573 Off. The VBAT
supply is the reference voltage for regulation. Since this voltage is missing during startup, the
Shunt Regulator 7571 is turned Off. The voltage on Pin 6 of 7511 goes Low, which turns the
drive from the IC On. When the set is On during normal operation, the supply voltage on Pin
2 of the IC is supplied by Pin 2 of Transformer 5512. When the VBAT supply reaches the
correct voltage, Pin 3 of the Shunt Regulator 7571 reaches 2.5 volts switching it On. This
switches the opto-isolator On to provide a regulation feedback path.
Transistor 6551 provides a power on ramping of
the VBAT supply.
7512 drive test points.
Page 7
-T
V
-T
+T
Rs
Rh
KA
REF
Vcc
Gnd
Ctrl
START-UP
CURRENT SOURCE
VALLEY
START-UP
CURRENT SOURCE
CURRENT
SENSING
OUTPUT
DRIVER
OVER
POWER
LOGIC
CONTROL
CIRCUIT
MAXIMUM
ON-TIME
PROTECTION
VOLTAGE
CONTRLLED
OSCILLATOR
OVER
TEMPERATURE
PROTECTIOM
POWER-ON
RESET
SUPPLY
MANAGEMENT
FREQUENCY
PROTECTION
CONTROL
INPUT
CONTROL
CIRCUIT
BURST
DETECTOR
Drain
HVS
Sense
Demag
Driver
9V3
*
HOT GROUND
D
RES
15V5
HOT
G
*
TUNER IF
Front Interface Panel
6
*
FOR MAINS 120V AC 170V (177V)
100n
*
*
14
*
*
RES
(For
TEA1506T/N1
2V3
..V.. Normal Operation
POWER SUPPLY
*
160V
0V
T4E.250V
Lightning Protection
Vbat
AUDIO OUTPUT
1572
"$"
140V
Provision For
15V6
COLD
*
0R1
3
7
*
16V4
2506
33n
*
*
*
*
RES
*
LKS1AF
0V
DEGAUSSING COIL
*
9
SET
MAIN RANGE
REGION
For ITV only
*
Provision For
RES
*
0V
0V
AC Main Plug
Or
From 1505 Of
For EMC
470P
2X10w
---
---
---
---
---
--JMP
JMP
JMP
---
---
---
---
---
--JMP
JMP
JMP
*
+16V
1577
2506
5500
9502
9504
9506
2
*
*
297V
*
COLD GROUND
(..V..) Standy Mode
For ITV Only
1n5
TO 1013 OF
RES
8V2
295V
1n5
*
2V3
-16V
Protection)
*
2V2
RES
16V4
RES
*
RGP10D
Lightning Protection
"$"
S
8V2
11
0V
Lightning
A4
*
9577
9572
5V
143V
30WSRF-HD
2X10w
143V
27VRF-HD
LR
NAFTA
1502
PFC5000
AUDIO_GND1
1546
-Vaudio
+Vaudio
AC_IN
9572
2
1
3
BAS316
6514
6551
STPS10L60D
6564
I525
I543
100n
2516
47K
3541
I542
5561
100u
2552
6563
I584
I583
3579
F562
2K2
5564
1
4
23
45
81
DMF2405H60
I501
5502
I513
9506
I561
3500
3M3
3516
2505
5
8
9
13
14
15
16
17
18
2
3
4
5512
10
11
12
1M5
3504
2503
2n2
I502
F573
1K0
3515
F503
I527
Audio_Gnd
2502
PFC5000
1501
1
2
3M3
1505
F506
3501
22u
5563
AUDIO_GND2
1510
2574
1n0
1500
9513
9512
3509
2R0
2n2
2504
I522
9511
TCET1103(G)
7513
14
3
2
3508
220R
7512
22u
2511
2562
50V
F563
470p
2565
F541
I562
3520
I582
I521
I581
I552
I580
1
3
2
7571
TL431CZ-AP
2
1507
1
3523
3
2
1
4R5
4R5
2541
47u 25V
9503
2508
100n
1N5062
5551
6575
27u
5552
3502
I505
PDTC114ET
7573
F509
3519
15K
9510
MainSupplyGnd
47K
3522
2518
10n
I515
I508
3574
7511
I511
15n
2571
2542
F501
F552
3524
47K
9505
I576
F504
3575
82K
3K3
AUDIO_GND1
3521
3573
15K
BC857B
7541
1n0
2517
3571
F502
MainSupplyGndA
I551
9500
2515
470p
5511
F500
I573
I578
AUDIO_GND2
I574
2K2
3513
4K7
3576
I520
I519
F507
6511
I514
AUDIO_GND1
Vaux_GND1
F510
6562
9563
F508
F542
2512
3M3
3506
4R73511
F564
F565
9577
1577
2.5AF
I506
I579
2551
1n0
2563
2501
100p
2519
2.5AF
1572
I571
F561
5562
3505
2570
2507
10n
2572
3510
7514
BC847B
3517
330K
2R0
1K2
I524
I572
3512
I517
BZX384-C12
6541
23
5500
14
2514
I523
2561
1n0
3518
9502
Vaux_GND1
3K3
9501
1
4
23
I518
DMF2405H60
5501
1503
341
2
AUDIO_GND2
470n
I507
2500
1
4
9504
6500
23
5506
14
23
1
2
DMF35
1504
3514
3503
DSP-301N
2509
2513
470p
1545
I516
5513
1u0
VCC
Stdby_Con
+Vaudio
VDC
Vbatt
+6V
14 On
2.8 Off
0.6V Off
1.3V On
Page 8
FIGURE 3 - MAIN POWER SUPPLY
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