Sharp 32LF-92H (serv.man2) Service Manual ▷ View online
5
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CHASSIS
Option 39. Personal Preference Equalizer Band 1 ......................................................................44
Option 40. Personal Preference Equalizer Band 2 ......................................................................44
Option 41. Personal Preference Equalizer Band 3 ......................................................................44
Option 42. Personal Preference Equalizer Band 4 ......................................................................44
Option 43. Personal Preference Equalizer Band 5 ......................................................................44
Option 44. Sound Effect (Standard; Music; Speech; Jazz; Pp) .................................................44
Option 45. Volume Offset Left .......................................................................................................44
Option 46. Volume Offset Right ....................................................................................................44
Option 47. Volume Offset Center ..................................................................................................45
Option 48. Volume Offset Rear......................................................................................................45
Option 49. Surround Delay ............................................................................................................45
Option 50. FM Prescaler.................................................................................................................45
Option 51. NICAM Prescaler ..........................................................................................................45
Option 52. Scart Input Prescaler ...................................................................................................45
Option 53. I2S Prescaler ................................................................................................................45
Option 54. Scart Output Prescaler ................................................................................................45
Option 55. Speaker Setup .............................................................................................................46
Option 56. Audio Options Available Or Not .................................................................................46
Option 57. Stereo Threshold .........................................................................................................46
Option 58. MSP Audio Flags..........................................................................................................47
Option 59. NICAM Threshold.........................................................................................................47
Option 60. Power Delay Time ........................................................................................................47
14.4.OPTION TABLE RECOMMENDED VALUES.............................................................................50
14.5.SCREEN ADJUSTMENT (FBT SCREEN) ..................................................................................52
14.6.GEOMETRY ADJUSTMENT .......................................................................................................53
4:3 FORMATS..................................................................................................................................53
16:9 FORMATS................................................................................................................................54
15.BLOCK DIAGRAM
......................................................................................................................61
16.CIRCUIT DIAGRAMS
.................................................................................................................62
17. HOW TO UPDATE THE TECHNICAL INFORMATION
………………………………… 73
17.1. HOW TO UPDATE THE TECHNICAL INFORMATION APPEARED ON THIS SERVICE
MANUAL (AND RELATIVES) ....................................................................................................73
MANUAL (AND RELATIVES) ....................................................................................................73
17.2. NVM / EEPROM RECORDER ....................................................................................................73
17.3. CHASSIS LABEL INFORMATION.............................................................................................73
17.4. CODE BAR LABEL INFORMATION..........................................................................................74
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CHASSIS
1.INTRODUCTION
11AK45 is a 50Hz colour television capable of driving 24” + CRT sizes (beginning from 24” 16:9 up to
33”).
The chassis is capable of operation in PAL, SECAM, NTSC (playback) colour standards and multiple
transmission standards as B/G, D/K, I/I’, and L/L´.
Sound system output is supplying 2x10W (10%THD) for left and right outputs of 8ohm speakers.
TV supports FASTTEXT. It is possible to decode transmissions including high graphical data.
The chassis is equipped with three full EuroScarts; only one of them supports RGB input, one
headphone output, one FAV input, one SVHS input (via SCART)
33”).
The chassis is capable of operation in PAL, SECAM, NTSC (playback) colour standards and multiple
transmission standards as B/G, D/K, I/I’, and L/L´.
Sound system output is supplying 2x10W (10%THD) for left and right outputs of 8ohm speakers.
TV supports FASTTEXT. It is possible to decode transmissions including high graphical data.
The chassis is equipped with three full EuroScarts; only one of them supports RGB input, one
headphone output, one FAV input, one SVHS input (via SCART)
2.TUNER
The hardware and software of the TV is suitable for tuners, supplied by different companies, which are
selected from the Service Menu. These tuners can be combined VHF, UHF tuners suitable for CCIR
systems B/G, H, L, L´, I/I´, and D/K. The tuning is available through the digitally controlled I
selected from the Service Menu. These tuners can be combined VHF, UHF tuners suitable for CCIR
systems B/G, H, L, L´, I/I´, and D/K. The tuning is available through the digitally controlled I
2
C bus
(PLL). Below you will find info on one of the Tuners in use.
General description of UV1316:
The UV1316 tuner belongs to the UV 1300 family of tuners, which are designed to meet a wide range
of applications. It is a combined VHF, UHF tuner suitable for CCIR systems B/G, H, L, L’, I and I’. The
low IF output impedance has been designed for direct drive of a wide variety of SAW filters with
sufficient suppression of triple transient.
General description of UV1316:
The UV1316 tuner belongs to the UV 1300 family of tuners, which are designed to meet a wide range
of applications. It is a combined VHF, UHF tuner suitable for CCIR systems B/G, H, L, L’, I and I’. The
low IF output impedance has been designed for direct drive of a wide variety of SAW filters with
sufficient suppression of triple transient.
Features of UV1316:
1. Member of the UV1300 family small sized UHF/VHF tuners
2. Systems CCIR: B/G, H, L, L’, I and I’; OIRT: D/K
3. Digitally controlled (PLL) tuning via I
1. Member of the UV1300 family small sized UHF/VHF tuners
2. Systems CCIR: B/G, H, L, L’, I and I’; OIRT: D/K
3. Digitally controlled (PLL) tuning via I
2
C-bus
4. Off-air channels, S-cable channels and Hyperband
5. World standardized mechanical dimensions and world standard pinning
6. Compact
5. World standardized mechanical dimensions and world standard pinning
6. Compact
size
7. Complies to “CENELEC EN55020” and “EN55013”
Pinning:
1.
1.
Gain control voltage (AGC) :
4.0V, Max: 4.5V
2. Tuning
voltage
3.
I²C-bus address select
:
Max: 5.5V
4.
I²C-bus serial clock
:
Min:-0.3V, Max: 5.5V
5.
I²C-bus serial data
:
Min:-0.3V, Max: 5.5V
6. Not
connected
7.
PLL supply voltage
:
5.0V, Min: 4.75V, Max: 5.5V
8. ADC
input
9.
Tuner supply voltage
:
33V, Min: 30V, Max: 35V
10. Symmetrical IF output 1
11. Symmetrical IF output 2
11. Symmetrical IF output 2
3.IF PART (TDA9885/86)
The TDA9885 is an alignment-free single standard (without positive modulation) vision and sound IF signal
PLL.
The TDA9886 is an alignment-free multistandard (PAL, SECAM and NTSC) vision and sound IF signal PLL
Both devices can be used for TV, VTR, PC and set-top box applications.
The following figure shows the simplified block diagram of the integrated circuit.
The integrated circuit comprises the following functional blocks:
VIF amplifier, Tuner and VIF-AGC, VIF-AGC detector, Frequency Phase-Locked Loop (FPLL) detector, VCO
and divider, Digital acquisition help and AFC, Video demodulator and amplifier, Sound carrier trap, SIF
amplifier, SIF-AGC detector, Single reference QSS mixer, AM demodulator, FM demodulator and acquisition
help, Audio amplifier and mute time constant, I
PLL.
The TDA9886 is an alignment-free multistandard (PAL, SECAM and NTSC) vision and sound IF signal PLL
Both devices can be used for TV, VTR, PC and set-top box applications.
The following figure shows the simplified block diagram of the integrated circuit.
The integrated circuit comprises the following functional blocks:
VIF amplifier, Tuner and VIF-AGC, VIF-AGC detector, Frequency Phase-Locked Loop (FPLL) detector, VCO
and divider, Digital acquisition help and AFC, Video demodulator and amplifier, Sound carrier trap, SIF
amplifier, SIF-AGC detector, Single reference QSS mixer, AM demodulator, FM demodulator and acquisition
help, Audio amplifier and mute time constant, I
2
C-bus transceivers and MAD (module address), Internal
voltage stabilizer.
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CHASSIS
4.VIDEO SWITCH TEA6415
In case of three or more external sources are used, the video switch IC TEA6415 is used. The main
function of this device is to switch 8 video-input sources on the 6 outputs.
Each output can be switched on only one of each input. On each input an alignment of the lowest level
of the signal is made (bottom of sync. top for CVBS or black level for RGB signals).
Each nominal gain between any input and output is 6.5dB.For D2MAC or Chroma signal the alignment
is switched off by forcing, with an external resistor bridge, 5VDC on the input. Each input can be used
as a normal input or as a MAC or Chroma input (with external Resistor Bridge). All the switching
possibilities are changed through the BUS. Driving 75ohm load needs an external resistor. It is possible
to have the same input connected to several outputs.
function of this device is to switch 8 video-input sources on the 6 outputs.
Each output can be switched on only one of each input. On each input an alignment of the lowest level
of the signal is made (bottom of sync. top for CVBS or black level for RGB signals).
Each nominal gain between any input and output is 6.5dB.For D2MAC or Chroma signal the alignment
is switched off by forcing, with an external resistor bridge, 5VDC on the input. Each input can be used
as a normal input or as a MAC or Chroma input (with external Resistor Bridge). All the switching
possibilities are changed through the BUS. Driving 75ohm load needs an external resistor. It is possible
to have the same input connected to several outputs.
5.MULTI STANDARD SOUND PROCESSOR
The MSP 34x10G family of single-chip Multi-standard Sound Processors covers the sound processing
of all analog TV-Standards worldwide, as well as the NICAM digital sound standards. The full TV sound
processing, starting with analog sound IF signal-in, down to processed analog AF-out, is performed on
a single chip.
The DBX noise reduction, or alternatively, MICRONAS Noise Reduction (MNR) is performed alignment
free.
of all analog TV-Standards worldwide, as well as the NICAM digital sound standards. The full TV sound
processing, starting with analog sound IF signal-in, down to processed analog AF-out, is performed on
a single chip.
The DBX noise reduction, or alternatively, MICRONAS Noise Reduction (MNR) is performed alignment
free.
6.SOUND OUTPUT STAGE WITH TDA7269A
The TDA7269A is class AB dual Audio power amplifier assembled in the Multi-watt package, specially
designed for high quality sound application as Hi-Fi music centers and stereo TV sets.
designed for high quality sound application as Hi-Fi music centers and stereo TV sets.
7.VERTICAL OUTPUT STAGE WITH STV9379FA
The IC STV9379FA is the vertical deflection booster circuit. Two supply voltages, +14V and –14V are
needed to scan the inputs VERT+ and VERT-, respectively. And a third supply voltage, +60V for the
flyback limiting is needed. The vertical deflection coil is connected in series between the output and
feedback to the input.
needed to scan the inputs VERT+ and VERT-, respectively. And a third supply voltage, +60V for the
flyback limiting is needed. The vertical deflection coil is connected in series between the output and
feedback to the input.
8.VIDEO OUTPUT AMPLIFIER TDA6108
The TDA6108Q includes three video output amplifiers is intended to drive the three cathodes of a
colour picture tube.
colour picture tube.
u
ll pagewidth
MHC108
DIGITAL VCO CONTROL
AFC DETECTOR
RC VCO
VIF-PLL
VIF-AGC
TUNER AGC
SUPPLY
SIF-AGC
AUDIO PROCESSING
AND SWITCHES
NARROW-BAND
FM-PLL DEMODULATOR
SINGLE REFERENCE QSS MIXER
INTERCARRIER MIXER
AND AM DEMODULATOR
SOUND CARRIER
TRAPS
4.5 to 6.5 MHz
TAGC
CVAGC(pos)
CAGC(neg)
CBL
VAGC
(1)
TOP
14 (15)
VPLL
19 (21)
9 (8)
16 (17)
15 (16)
21 (23)
4 (2)
10 (9)
11 (10)
12 (11)
18 (20)
20 (22)
2 (31)
1 (30)
(18) 17
(7) 8
(3) 5
(4) 6
external reference signal
or 4 MHz crystal
REF
AFC
AUD
CVBS
audio output
video output: 2 V (p-p)
[1.1 V (p-p) without trap]
[1.1 V (p-p) without trap]
CAF
SIOMAD
SDA
SCL
MAD
VP
CAGC
(6, 12, 13, 14, 17,
19, 25, 28, 29, 32)
13
19, 25, 28, 29, 32)
13
n.c.
AGND
7 (5)
DGND
OUTPUT
PORTS
I
2
C-BUS TRANSCEIVER
22 (24)
3 (1)
OP1
OP2
FMPLL
DEEM
AFD
sound intercarrier output
and MAD select
FM-PLL
filter
VIF-PLL
filter
de-emphasis
network
VIF2
VIF1
24 (27)
23 (26)
SIF2
SIF1
TDA9885
TDA9886
TDA9886
(1) Not connected for TDA9885.
Pin numbers for TDA9885HN and TDA9886HN in parenthesis.
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CHASSIS
9.POWER SUPPLY (SMPS)
The DC voltages required at various parts of the chassis are provided by an SMPS transformer
controlled by the IC MC44608, which is designed for driving, controlling and protecting switching
controlled by the IC MC44608, which is designed for driving, controlling and protecting switching
transistor
of SMPS. The transformer generates 145V for Horizontal output stage, +/-14V for audio
amplifier, 5V and 3.3V stand by voltage and 8V, 12V and 5V supplies for other different parts of the chassis.
An optocoupler is used to control the regulation of line voltage and stand-by power consumption. There
is a regulation circuit in secondary side. This circuit produces a control voltage according to the
changes in 145V DC voltage, via an optocoupler (TCET1102G) to pin3 of the IC.
During the switch on period of the transistor, energy is stored in the transformer. During the switch off
period energy is fed to the load via secondary winding. By varying switch-on time of the power
transistor, it
is a regulation circuit in secondary side. This circuit produces a control voltage according to the
changes in 145V DC voltage, via an optocoupler (TCET1102G) to pin3 of the IC.
During the switch on period of the transistor, energy is stored in the transformer. During the switch off
period energy is fed to the load via secondary winding. By varying switch-on time of the power
transistor, it
controls each portion of energy transferred to the secondary side such that the output
voltage level remains nearly independent of load variations.
10.MICROCONTROLLER SDA55XX
10.1.General Features
• Feature selection via special function register
• Simultaneous reception of TTX, VPS, PDC, and WSS (line 23)
• Supply Voltage 2.5 and 3.3 V
• ROM version package PSDIP52-2, PMQFP64-1
• Romless version package PMQFP100-2, PLCC84-2
10.2.External Crystal and Programmable Clock Speed
• Single external 6MHz crystal, all necessary clocks are generated internally
• CPU clock speed selectable via special function registers.
• Normal Mode 33.33 MHz CPU clock, Power Save mode 8.33 MHz
10.3.Microcontroller Features
• 8bit 8051 instruction set compatible CPU.
• 33.33-MHz internal clock (max.)
• 0.360 ms (min.) instruction cycle
• Two 16-bit timers
• Watchdog timer
• Capture compare timer for infrared remote control decoding
• Pulse width modulation unit (2 channels 14 bit, 6 channels 8 bit)
• ADC (4 channels, 8 bit)
• UART (rxd, txd)
10.4.Memory
• Non-multiplexed 8-bit data and 16 … 20-bit address bus (ROMless Version)
• Memory banking up to 1Mbyte (Romless version)
• Up to 128 Kilobyte on Chip Program ROM
• Eight 16-bit data pointer registers (DPTR)
• 256-bytes on-chip Processor Internal RAM (IRAM)
• 128bytes extended stack memory.
• Display RAM and TXT/VPS/PDC/WSS-Acquisition-Buffer directly accessible via MOVX
• UP to 16KByte on Chip Extended RAM (XRAM) consisting of;
- 1 Kilobyte on-chip ACQ-buffer-RAM (access via MOVX)
- 1 Kilobyte on-chip extended-RAM (XRAM, access via MOVX) for user software
- 3 Kilobyte Display Memory
10.5.Display Features
• ROM Character Set Supports all East and West European Languages in single device
• Mosaic Graphic Character Set
• Parallel Display Attributes
• Single/Double Width/Height of Characters
• Variable Flash Rate
• Programmable Screen Size (25 Rows x 33...64 Columns)
• Flexible Character Matrixes (HxV) 12 x 9...16
• Up to 256 Dynamical Redefinable Characters in standard mode; 1024 Dynamical Redefinable
Characters in Enhanced Mode
• CLUT with up to 4096 colour combinations
• Feature selection via special function register
• Simultaneous reception of TTX, VPS, PDC, and WSS (line 23)
• Supply Voltage 2.5 and 3.3 V
• ROM version package PSDIP52-2, PMQFP64-1
• Romless version package PMQFP100-2, PLCC84-2
10.2.External Crystal and Programmable Clock Speed
• Single external 6MHz crystal, all necessary clocks are generated internally
• CPU clock speed selectable via special function registers.
• Normal Mode 33.33 MHz CPU clock, Power Save mode 8.33 MHz
10.3.Microcontroller Features
• 8bit 8051 instruction set compatible CPU.
• 33.33-MHz internal clock (max.)
• 0.360 ms (min.) instruction cycle
• Two 16-bit timers
• Watchdog timer
• Capture compare timer for infrared remote control decoding
• Pulse width modulation unit (2 channels 14 bit, 6 channels 8 bit)
• ADC (4 channels, 8 bit)
• UART (rxd, txd)
10.4.Memory
• Non-multiplexed 8-bit data and 16 … 20-bit address bus (ROMless Version)
• Memory banking up to 1Mbyte (Romless version)
• Up to 128 Kilobyte on Chip Program ROM
• Eight 16-bit data pointer registers (DPTR)
• 256-bytes on-chip Processor Internal RAM (IRAM)
• 128bytes extended stack memory.
• Display RAM and TXT/VPS/PDC/WSS-Acquisition-Buffer directly accessible via MOVX
• UP to 16KByte on Chip Extended RAM (XRAM) consisting of;
- 1 Kilobyte on-chip ACQ-buffer-RAM (access via MOVX)
- 1 Kilobyte on-chip extended-RAM (XRAM, access via MOVX) for user software
- 3 Kilobyte Display Memory
10.5.Display Features
• ROM Character Set Supports all East and West European Languages in single device
• Mosaic Graphic Character Set
• Parallel Display Attributes
• Single/Double Width/Height of Characters
• Variable Flash Rate
• Programmable Screen Size (25 Rows x 33...64 Columns)
• Flexible Character Matrixes (HxV) 12 x 9...16
• Up to 256 Dynamical Redefinable Characters in standard mode; 1024 Dynamical Redefinable
Characters in Enhanced Mode
• CLUT with up to 4096 colour combinations
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