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SERVICE MANUAL
SERVICE MANUAL
SERVICE MANUAL
SERVICE MANUAL
SERVICE MANUAL
SERVICE MANUAL
SERVICE MANUAL
SERVICE MANUAL
SERVICE MANUAL
SERVICE MANUAL
SERVICE MANUAL
SERVICE MANUAL
SERVICE MANUAL
SERVICE MANUAL
SERVICE MANUAL PT-90 A
SERVICE MANUAL
SERVICE MANUAL
SERVICE MANUAL 16/9
SERVICE MANUAL
SERVICE MANUAL CHASSIS
SERVICE MANUAL
SERVICE MANUAL
SERVICE MANUAL
SERVICE MANUAL
SERVICE MANUAL
SERVICE MANUAL
SERVICE MANUAL
SERVICE MANUAL
SERVICE MANUAL
Modification reserved
PT 90-A 16/9 Chassis Service Manual
CONTENTS
PAGE
1.Technical Data 4
2. Recommendation for service repairs 5
3. Service Menu 6
4. Specification of the connector (Euroscart) 10
5. Component descriptions 11
6. Introduction 12
7. Block Diagram 13
8. Fault tracing diagram-power supply 16
9. Troubleshooting guide for main PCB 17
10. Descriptions of the integrated circuits
- ST921x5 MICROCONTROLLER 19
- 24C08 NON-VOLATILE MEMORY 24
- STV224X MULTISTANDARD TV PROCESSOR 25
- MSP34XX (D/G) MULTISTANDARD SOUND PROCESSOR 30
- TDA7495 11+11W AMPLIFIER WITH
DC VOLUME CONTROL 32
- TDA7496 5+5 AMPLIFIER WITH
DC VOLUME CONTROL 35
- TDA7494 10W AMPLIFIER WITH
DC VOLUME CONTROL 38
- STV5112 RGB HIGH VOLTAGE VIDEO AMP. 41
- STV9306 BUS CONTROLLED VERTICAL
DEFLECTION SYSTEM 44
- TDA16846 CONTROLLER FOR SWITCH MODE 47
- TCDT1100(G) OPTOCOUPLER 50
- TL43l PROGRAMMABLE VOLTAGE REFERENCE 53
- SPP03N60S5 COOL MOS POWER TRANSISTOR 55
- SPP04N60S5 COOL MOS POWER TRANSISTOR 58
- L7805 POSITIVE VOLTAGE REGULATORS 61
- LM317 1.2V to 37V VOLTAGE REGULATORS 63
- BU508AF HORIZONTAL TRANSISTOR (110o) 65
3
PT 90-A 16/9 Chassis Service Manual
TECHNICAL DATA
CRT PANEL
Visible Picture 28" / 106o / 66 cm
Deflection Angle 110o 32" / 106o / 76 cm.
Vertical Frequency 50Hz
Horizontal Frequency 15.625Hz
ELECTRONIC
Program Number 100+AV
Teletext Flof text
Tuner Cable tuner - 8 MHz spacing for Hyper Band
TV System European CCIR system
Music Power 110o 2x8 Watt Rms 10% distortion
CONNECTIONS
Euro AV Socket Include
MAIN STAGE
Mains Voltage 165-260VAC
Mains Frequency 50Hz
Power Consumption 28", 32" 126 Watt
In Stby Mode 28", 32" 8 Watt
3
PT 90-A 16/9 Chassis Service Manual
SERVICE MENU
The service menu is entered by pressing a special 4-digit code if the feature menu is displayed and TV is in FE -mode. While
TV isn't in AV Mode and featura menu is displayed, pressing sequence of digits 1923 will enter the TV to service mode and
service menu will be displayed.
PT90 Option Tables B3 1 OSD contrast control ON
0 OSD contrast control OFF
PT90 ST92195DS01-V1 B4 1 disable
Option 1 0 Blue screen enable
B0 1 B/G Available B5 1 AVC Automatic Volume Correction
0 not available (Stereo) AVL(Mono),
B1 1 D/K Available 0 not available
0 not available B6 1 DVD available
B2 1 I Avaialble 0 not available
0 not available B7 1 Standby after power on
B3 1 L Available 0 No Standby after power on
0 not available
B4-B5 0 TTX GROUP 1 (ENG, GER, SWE, ITA,
FRA, SPA, CZH, RUM)
PT90 ST92195DS01-V2
1 TTX GROUP 2 (POL, GER, SWE, ITA, Option 1
FRA, YUV, CZH, RUM) B0 1 B/G Available
10 TTX GROUP 3 (ENG, GER, SWE, ITA, 0 not available
FRA, SPA, TUR, RUM) B1 1 D/K Available
11 TTX GROUP 4 (ENG, GER, SWE, ITA, 0 not available
FRA, SPA, TUR, RUM) B2 1 I Avaialble
B6-B7 0 Samsung 0 not available
1 Temic B3 1 L Available
10 Philips UV1316 0 not available
11 Thomson/Orega B4 1 Keyboard with menu
Option 2 0 Keyboard without menu
B0 1 AV2 mode available B5 1 Farsi Available
0 not available 0 not available
B1 1 SVHS mode available B6-B7 0 Samsung
0 not available 1 Temic
B2 1 Volume Linear 10 Philips UV1316
0 Volume Logaritmic 11 Thomson/Orega
B3 1 Ecoswitch available Option 2
0 not available B0 1 AV2 mode available
B4 1 Child Lock available 0 not available
0 not available B1 1 SVHS mode available
B5 1 Headphone available 0 not available
0 not available B2 1 Volume Linear
B6 1 No Subwoofer 0 Volume Logaritmic
0 Subwoofer available B3 1 Ecoswitch available
B7 1 4/3 Picture tube 0 not available
0 16/9 Picture tube B4 1 Reduce tone
Option 3 0 Reduce Volume (MSP Sound mode)
B0 1 One Crystal application (4.43 Mhz) B5 1 Headphone available
0 2 cystal application (for NTSC play back) 0 not available
B1 1 Intercarrier application B6 1 No Subwoofer
0 QSS application 0 Subwoofer available
B2 1 APR available B7 1 4/3 Picture tube
0 not available 0 16/9 Picture tube
6
PT 90-A 16/9 Chassis Service Manual
Option 3 0 16/9 Picture tube
B0 1 One Crystal application (4.43 Mhz) Option 3
0 2 cystal application (for NTSC playback) B0 1 One Crystal application (4.43 Mhz)
B1 1 Intercarrier application 0 2 cystal application (for NTSC playback)
0 QSS application B1 1 Intercarrier application
B2 1 MSP Carrier Mute On 0 QSS application
0 MSP Carrier Mute Off B2 1 STV224XE (Uses extra features as RGB
B3 1 OSD contrast control ON Peak limitation)
0 OSD contrast control OFF 0 The other video IC's (ST2248E included)
B4 1 disable B3 1 OSD contrast control ON
0 Blue screen enable 0 OSD contrast control OFF
B5 1 AVC Automatic Volume Correction B4 1 disable
(Stereo) AVL(Mono) 0 Blue screen enable
0 not available B5 1 AVC Automatic Volume Correction
B6 1 DVD available (Stereo) AVL(Mono),
0 not available 0 not available
B7 1 Standby after power on B6 1 DVD available
0 No Standby after power on 0 not available
B7 1 Standby after power on
0 No Standby after power on
PT90 ST92195DS01-V3
Option 1
B0 1 B/G Available PT90 ST92195T01-H1 (Home Theatre)
0 not available Option 1
B1 1 D/K Available B0 1 B/G Available
0 not available 0 not available
B2 1 I Avaialble B1 1 D/K Available
0 not available 0 not available
B3 1 L Available B2 1 I Avaialble
0 not available 0 not available
B4 1 Keyboard with menu B3 1 L Available
0 Keyboard without menu 0 not available
B5 1 Brightness full range available B4 1 Keyboard with menu
0 Brightness 75% range available 0 Keyboard without menu
(manual cut off) B5 1 Brightness full range available
B6-B7 0 Samsung 0 Brightness 75% range available (manual
1 Temic cut off)
10 Philips UV1316 B6-B7 0 Samsung
11 Thomson/Orega 1 Temic
Option 2 10 Philips UV1316
B0 1 AV2 mode available 11 Thomson/Orega
0 not available Option 2
B1 1 SVHS mode available B0 1 AV2 mode available
0 not available 0 not available
B2 1 2248 Volume register max (DVD B1 1 SVHS mode available
and Stereo chassis) 0 not available
0 Volume Logaritmic (mono chassis) B2 1 APR available
B3 1 Search mono audio ident available 0 not available
(auto ident for BG & DK) B3 1 DVD mute pin option
0 not available 0 not available
B4 1 DVS Loader (Y/C) B4 1 DVS Loader (Y/C)
0 ESS and Zoran Loaders 0 ESS and Zoran Loaders (RGB,CVBS)
(RGB,CVBS) B5 1 Headphone available
B5 1 Headphone available 0 not available
0 not available B6 1 No Subwoofer
B6 1 No Subwoofer 0 Subwoofer available
0 Subwoofer available B7 1 4/3 Picture tube
B7 1 4/3 Picture tube 0 16/9 Picture tube
7
PT 90-A 16/9 Chassis Service Manual
Option 3 Option 3
B0 1 One Crystal application (4.43 Mhz) B0 1 One Crystal application (4.43 Mhz)
0 2 cystal application (for NTSC playback) 0 2 cystal application (for NTSC playback)
B1 1 Intercarrier application B1 1 Intercarrier application
0 QSS application 0 QSS application
B2 1 STV224XE (Uses extra features as RGB B2 1 STV224XE (Uses extra features as RGB
Peak limitation) Peak limitation)
0 The other video IC's (ST2248E included) 0 The other video IC's (ST2248E included)
B3 1 OSD contrast control ON B3 1 OSD contrast control ON
0 OSD contrast control OFF 0 OSD contrast control OFF
B4 1 disable B4 1 disable
0 Blue screen enable 0 Blue screen enable
B5 1 AVC Automatic Volume Correction B5 1 AVC Automatic Volume Correction
(Stereo) AVL(Mono), (Stereo) AVL(Mono),
0 not available 0 not available
B6 1 DVD available B6 1 DVD available
0 not available 0 not available
B7 1 Standby after power on B7 1 Standby after power on
0 No Standby after power on 0 No Standby after power on
Option 4
PT90 ST92195DSPHD1-V4 E B0 1 Home Cinema On
Option 1 0 Home Cinema Off
B0 1 L Available B1 1 Pip On
0 not available 0 Pip Off
B1 1 not used B2 1 DVB T ON
0 not used 0 DVB T OFF
B2 1 no Pin 8 16:9 switching mode B3 1 TXT ON
0 Pin 8 16:9 switching mode 0 TXT OFF
B3 1 Turn on from AV enabled B4 1 Not used
0 Turn on from AV disabled 0 Not used
B4 1 Keyboard with menu B5 1 Not used
0 Keyboard without menu 0 Not used
B5 1 Brightness full range available B6-B7 0 Samsung (TECC2949PS35 B(T),
0 Brightness 75% range available (manual TECC2949PS35 P(T))
cut off) 1 Temic
B6-B7 0 Samsung (TECC2949PS35 B(T), 10 Philips UV1316
TECC2949PS35 P(T)) 11 Thomson/Orega
1 Temic
10 Philips UV1316
11 Thomson/Orega
Option 2
B0 1 AV2 mode available
0 not available
B1 1 SVHS mode available
0 not available
B2 1 2248 Volume register max (DVD and
Stereo chassis)
0 Volume Logaritmic (mono chassis)
B3 1 not used
0 not used
B4 1 DVD picture in CVBS mode
0 DVD picture in RGB mode
B5 1 Headphone available
0 not available
B6 1 No Subwoofer
0 Subwoofer available
B7 1 4/3 Picture tube
0 16/9 Picture tube
8
PT-90 Chassis Service Manual
35
PT-90 Chassis Service Manual
TDA7494
10W Amplifier With DC Volume Control
36
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