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Philips PR1906C121 Technical Service Data
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Philips PR1906C121 Technical Service Data

Philips PR1906C121 Technical Service Data

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Philips Consumer Electronics
Technical Service Data
Service and Quality
Service Publications Dept.
One Philips Drive
P.O. Box 14810
Knoxville, TN 37914
Pg. SCHEMATIC DIAGRAMS AND PC BOARDS
1. Schematic/Circuitry Listings
2. Main Ch. - Power Supply Circuitry (A01)
3. Main Ch. - Line Deflection Circuitry (A02)
4. Main Ch. - Frame Deflection Circuitry (A03)
5. Main Ch. - Sync Circuitry (A04)
6. Main Ch. - Tuner/Video/IF Circuitry (A05)
7. Main Ch. - Video Processing Circuitry (A06)
8. Main Ch. - SIF/Audio Circuitry (A07)
9. Main Ch. - External Input Circuitry (A08)
10. Main Ch. - Audio Amplifier Circuitry (A09)
SAFETY NOTICE: ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE
HIMSELF WITH THE CHASSIS AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS
TO BE USED WHEN SERVICING ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES.
CAUTION: USE A SEPARATE ISOLATION TRANSFORMER FOR THIS UNIT WHEN SERVICING
© Philips Electronics North America Corporation
11. Main Ch. - Control Circuitry (A10)
12. CRT Panel Circuitry (B)
13. BTSC Stereo Circuitry (C) - ASD100 Panel
14. Main Ch. & CRT Panel PCBs (Top View)
15. Main Ch. & CRT Panel PCBs (Bottom View)
16. BTSC Sterero PCB (ASD100 Panel - Top View)
17. BTSC Sterero PCB (ASD100 Panel - Bottom View)
18. OVERALL BLOCK DIAGRAM
REFER TO SAFETY GUIDELINES
Manual 7590
Model no.: PR1906C121
First Publish: 10-09-01
Rev. Date: 04-04-00
Print Date: 18/07/2006
Visit our World Wide Web Site at http://www.forceonline.com

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Summary of Contents for Philips PR1906C121

  • Page 1 HIMSELF WITH THE CHASSIS AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES. CAUTION: USE A SEPARATE ISOLATION TRANSFORMER FOR THIS UNIT WHEN SERVICING © Philips Electronics North America Corporation Visit our World Wide Web Site at http://www.forceonline.com...
  • Page 2 HIMSELF WITH THE CHASSIS AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES. CAUTION: USE A SEPARATE ISOLATION TRANSFORMER FOR THIS UNIT WHEN SERVICING © Philips Electronics North America Corporation Visit our World Wide Web Site at http://www.forceonline.com...
  • Page 3 MAIN CABINET EXPLODED VIEW Page: 1 of 1...
  • Page 4 HIMSELF WITH THE CHASSIS AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES. CAUTION: USE A SEPARATE ISOLATION TRANSFORMER FOR THIS UNIT WHEN SERVICING © Philips Electronics North America Corporation Visit our World Wide Web Site at http://www.forceonline.com...
  • Page 14 HIMSELF WITH THE CHASSIS AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES. CAUTION: USE A SEPARATE ISOLATION TRANSFORMER FOR THIS UNIT WHEN SERVICING © Philips Electronics North America Corporation Visit our World Wide Web Site at http://www.forceonline.com...

  • Page 15: General Information

    Replacement Parts List. If you are attempting to service a model equipped with the J8 chassis, the necessary electrical information should be covered in this service manual, even if the corresponding model number is not listed. PHILIPS/MAGNAVOX MODELS Model Size...

  • Page 16: Power Supply

    Power consumption: < 3 Watts PICTURE TUBES Screen sizes & tubes: 13“/19“ Maximum average beam current: 13“: 0.75 mA 19“: 1 mA EHT voltage 13“: 24.4 ± 1kV (no load) 19“: 26.8 ± 1kV (no load) COLOR Synchronisation Sub-carrier pull-in range NTSC systems: >...
  • Page 17 3139 228 83591 Remote Transmitter RC1112501/04 PR1320C121 3139 228 83601 Remote Transmitter RC1112901/04 PR1392X121 3139 228 81461 Remote Transmitter RC282901/04W PR1906C121/C122/C125 3139 228 83591 Remote Transmitter RC1112501/04 PR1921C121/C125 3139 228 83601 Remote Transmitter RC1112901/04 PS1947C121/C125 3139 228 83601 Remote Transmitter RC1112901/04...

  • Page 18: Glossary Of Terms And Abbreviations

    Jack Panel Information Display Jack Panel Information Chart Glossary of Terms and Abbreviations Two Channel Stereo Automatic Frequency Control Automatic Fine Tuning Asia Pacific Automatic Tuning System External Audio/Video Automatic Volume Level control BTSC Broadcast Television Standard Committee (TV stereo) Circuit Board Assembly (PCB) Closed Captioning Customer Service Mode...
  • Page 19 Second Audio Program Serial Clock Serial Data SDAM Service Default Alignment Mode SVHS Super Video Home System Total Harmonic Distortion Top Level Menu This refers to the main menu (as opposed to sub menus) in SAM V-Chip Violence-Chip Video Cassette Recorder Luminance/Chrominance (video) Safety Instructions - Resolder Notice Safety regulations require that during a repair:...
  • Page 20 Note: After servicing this unit, be sure to check that the AC cord is properly dressed as shown in the detailed view. Display AC Cord Lead Dress...
  • Page 21 Display Feature Chart...
  • Page 22 Display RC1112501 Remote...
  • Page 23 Display RC1112901 Remote...
  • Page 24 Display RC282901 Remote...
  • Page 25 Display Jack Panel Information Chart...
  • Page 28 HIMSELF WITH THE CHASSIS AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES. CAUTION: USE A SEPARATE ISOLATION TRANSFORMER FOR THIS UNIT WHEN SERVICING © Philips Electronics North America Corporation Visit our World Wide Web Site at http://www.forceonline.com...
  • Page 29 J8 CHASSIS SERVICE ADJUSTMENTS Service Adjustment Notes: REQUIRED TOOLS FOR SERVICING Isolation Transformer Multimeter Oscilloscope High Voltage (100:1) Oscilloscope Probe Sencore VG91 Universal Video Generator Caution: The J8 chassis incorporates a "hot" ground system. Always use a separate isolation transformer when applying power to the exposed chassis. Unless Otherwise Specified: 1.
  • Page 30 Other error codes are: • Video Chip start-up failure The last five errors, stored in the NVM, are shown in the service menu. This is called the error buffer. An error code will be added to the buffer if it differs from the last error detected. If errors occur simultaneously, and the codes for these errors differ from the errors currently on screen, the display will be updated to reflect this change.
  • Page 31 „Ignoring“ means that the event that is triggered is not executed, the setting remains unchanged. (Example: Timer OFF: 8:00 PM; the set will not switch OFF in service mode at 8.00PM, but the setting will remain). These modes are: • Blue mute. •...

  • Page 32: Geometry Adjustments

    − if the main version number changes, the new version number is written in the EEPROM. − if the sub version number changes, the new version number is written in the EEPROM. − Note: a new micro controller is considered to be compatible if it works instead of the old software and the functionality is not significantly changed.
  • Page 33 2. From the SDAM menu, use the Menu Up/Down buttons to highlight V-SIZE. 3. Input a cross-hatch pattern to the antenna/cable input terminal. 4. Using the Menu Left button, reduce the value so that the picture does not fill the entire screen.(Range of 0-63) 5.
  • Page 34 Figure 3 - OPT sub-menu The OPT (Options) sub-menu is entered using the MENU LEFT/RIGHT command. This sub-menu displays the option items available which can be selected by using the MENU UP/DOWN buttons on the remote and the option item values can be changed using the MENU LEFT or RIGHT buttons on the remote.
  • Page 35 The VCO sub-menu consists of RF-AGC, H, and VIF items. RF-AGC (refers to RF AGC adjust; range of 0-127), H (refers to H VCO ADJ; range 0-7), and VIF (refers to VIF VCO adjust; range 0-63) items. Note that when the VIF item value is being adjusted, the items AFT 0 (displays either 1/0) and AFT 1 (displays either 1/0) are displayed permanently.
  • Page 36 13. Turn the set back off. 14. Adjust G2 (Screen) clockwise until a line just becomes visible. This line will be the color of the dominant gun. 15. Adjust the other two cutoff controls to achieve a low level white line. 16.
  • Page 37 Convergence and Purity Adjustments Notes: 1. The following adjustments were performed with a Sencore VG91 Universal Video Generator. 2. Set the VG91 Generator as follows: STD TV Ch. 3, RF-IF Range set to HI, RF-IF Level set to NORMAL (1), Video Pattern = Raster, R-G-B raster controls OFF, Mode Switch set to L+R, Audio Frequency set to 300Hz, and 0 Pilot (max.
  • Page 38 ZERO CORRECT ION GRIDS POSIT ION (G2 & G3) 2Y POLE 2X POLE 4 POLE 6 POLE CONVERGENCE & PURIT Y ASSEMBLY Figure 8 - 2X/2Y Spread/Rotate...

  • Page 39: Color Purity Adjustment

    2Y SPREAD SPREAD 2Y ROT AT E ROT AT E Color Purity Adjustment 1. Enter the Service Default Alignment Mode (SDAM) in either of the following two ways: a. Press the following key sequence on the remote control transmitter while the set is in Standby mode: 0-6-2-5-9-6-Status (Do not let the sequence time-out between entries) b.
  • Page 40 4. Slowly spread, and if necessary, rotate the 4-pole magnetic rings to converge red and blue lines at the center of the screen. 5. Use the Menu Up/Down buttons to select G (Green), and use the Menu Right button to set Green to maximum.
  • Page 41 Fig. 9a Fig. 9b Fig. 9c Fig. 10a Fig. 10b Fig. 10c Figures 11 & 12 - Yoke Tilt...
  • Page 42 Figure 11 Figure 12...
  • Page 43 Display Figure 1 - SDAM Flow Chart...
  • Page 44 HIMSELF WITH THE CHASSIS AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES. CAUTION: USE A SEPARATE ISOLATION TRANSFORMER FOR THIS UNIT WHEN SERVICING © Philips Electronics North America Corporation Visit our World Wide Web Site at http://www.forceonline.com...
  • Page 46 HIMSELF WITH THE CHASSIS AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES. CAUTION: USE A SEPARATE ISOLATION TRANSFORMER FOR THIS UNIT WHEN SERVICING © Philips Electronics North America Corporation Visit our World Wide Web Site at http://www.forceonline.com...
  • Page 47 PR1906C121 - Manual no. 7590 Page: 1 2605 10pF., 5%, 50V, Ceramic..3198 016 01090 J8 Main Chassis Parts 2606 10pF., 5%, 50V, Ceramic..3198 016 01090 J8 Main Chassis Parts 2607 10pF., 5%, 50V, Ceramic.
  • Page 48 PR1906C121 (continued) Page: 2 3508 5.6k, 5%, 1/4W, Carbon Film..3198 011 05620 3817 100 ohm, 5%, 1/6W, Carbon Film . . . 3198 011 01010 3509 680 ohm, 5%, 1/4W, Carbon Film . . .
  • Page 49 AC21 Torx Driver T-10 7 ..4835 395 97018 PR1906C121, 122, 125 Cabinet Parts PR1906C121, 122, 125 Cabinet Parts S AC01 AC Power Cord... .