Philips PR1906C121 User manual

Philips Consumer Electronics
Technical Service Data
Service and Quality
Service Publications Dept.
One Philips Drive
P.O. Box 14810
Knoxville, TN 37914
REFER TO SAFETY GUIDELINES
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 Visit our World Wide Web Site at http://www.forceonline.com
Manual 7590
Model no.: PR1906C121
First Publish: 10-09-01
Rev. Date: 04-04-00
Print Date: 18/07/2006
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)
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

Philips Consumer Electronics
Technical Service Data
Service and Quality
Service Publications Dept.
One Philips Drive
P.O. Box 14810
Knoxville, TN 37914
REFER TO SAFETY GUIDELINES
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 Visit our World Wide Web Site at http://www.forceonline.com
Manual 7590
Model no.: PR1906C121
First Publish: 10-09-01
Rev. Date: 04-04-00
Print Date: 18/07/2006
Mechanical Diagrams

MAIN CABINET EXPLODED VIEW Page: 1 of 1

Philips Consumer Electronics
Technical Service Data
Service and Quality
Service Publications Dept.
One Philips Drive
P.O. Box 14810
Knoxville, TN 37914
REFER TO SAFETY GUIDELINES
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 Visit our World Wide Web Site at http://www.forceonline.com
Manual 7590
Model no.: PR1906C121
First Publish: 10-09-01
Rev. Date: 04-04-00
Print Date: 18/07/2006
Troubleshooting

Philips Consumer Electronics
Technical Service Data
Service and Quality
Service Publications Dept.
One Philips Drive
P.O. Box 14810
Knoxville, TN 37914
REFER TO SAFETY GUIDELINES
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 Visit our World Wide Web Site at http://www.forceonline.com
Manual 7590
Model no.: PR1906C121
First Publish: 10-09-01
Rev. Date: 04-04-00
Print Date: 18/07/2006
General Information

GENERAL INFORMATION
J8 Chassis - Manual 7590
Display Product View - 19PR21
Model to Module List
The Model to Module list shown below identifies all electrical panels, modules and assemblies used in
each model produced with the J8 chassis. This information was current at time of printing.
Information concerning cabinet parts and cabinet mounted parts (CRT/Yoke/etc.) is shown in the Cabinet
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
Panel Number Description
13PR20C1 13“
00EMJ800 Main Chassis
PR1306C1 13“
00EMJ801 Main Chassis
PR1320C1 13“
00EMJ800 Main Chassis
PR1392X1 13“
00EMJ802 Main Chassis
19PR21C1 19“
00EMJ803 Main Chassis
19PR21C2 19“
00EMJ803 Main Chassis
19PS57C1 19“
00EMJ805 Main Chassis
00ASD100 Sound Panel
PR1906C1 19“
00EMJ804 Main Chassis
PR1921C1 19“
00EMJ803 Main Chassis
PS1947C1 19“
00EMJ806 Main Chassis
00ASD100 Sound Panel
Model/Chassis Feature Chart
Display Feature Chart
Specifications
STANDBY CONDITIONS

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: > ± 250 Hz
PICTURE PERFORMANCE
Chroma (3.579 MHz) suppression.: > 18 dB
PICTURE CONTROL :
Brightness
Color
Picture
Sharpness
Tint
Contrast Plus
SOUND POWER OUTPUTS:
Stereo: 2 x 1 Watts
Mono: 1 Watt
SPEAKERS:
Types: 3“ round
16 Ohm: 4W
8 Ohm: 2W
SOUND CONTROLS:
Volume: 64 steps.
Mute: on/off
AVL: on/off
SOUND MUTE:When there is no video recognition on terrestrial tuner signal the sound will be muted.
POWER SUPPLY
SPECIFICATIONS/PERFORMANCE
Mains voltage range: 120 10 %
Mains frequency: 60 Hz
Chassis mains insulated: Yes
Power consumption in standby: < 3W
Power consumption normal mode:
13“: 48 W 10 % (IEC)
19“: 67 W 10 % (IEC)

CLOSED CAPTION
Close Caption
Only CC-1 and CC-2 decoding and display
No Text mode
No Extended Data Sevices (EDS)
V – CHIP FUNCTION AVAILABLE
Automatic CC-1 selection at user mute
LOCAL CONTROLS: Mainsswitch
5 local keys
EXTERNAL CONNECTIONS
FRONT
Headphone
Audio-in (Cinch)
Video-in (Cinch)
REAR
Tuner
ESD-protected: 15 kV(Gnd) , 4kV(Signal)
HEADPHONE
Option Yes
Location Front
Peripherals Headphones with impedance between 8 - 600
Features When headphone plug is connected, loudspeaker
sound is muted.
Volume control: loudspeaker volume
Connector type 3.5 mm stereo Jack, with switch
Specifications Output: 8 < 4 mW
600 < 4 mW
Sound is the same as from
the loudspeakers.
ESD-protected 4 kV(Signal)
Remote Cross Reference
Model Part Number Description
13PR20C121 3139 228 83601 Remote Transmitter RC1112901/04
19PR21C121/C122/C125/C222 3139 228 83601 Remote Transmitter RC1112901/04
19PS57C121/C125 3139 228 83601 Remote Transmitter RC1112901/04
PR1306C121 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
Display RC1112501 Remote
Display RC1112901 Remote
Display RC282901 Remote

Jack Panel Information
Display Jack Panel Information Chart
Glossary of Terms and Abbreviations
2CS Two Channel Stereo
AFC Automatic Frequency Control
AFT Automatic Fine Tuning
AP Asia Pacific
ATS Automatic Tuning System
AV External Audio/Video
AVL Automatic Volume Level control
BTSC Broadcast Television Standard Committee (TV stereo)
CBA Circuit Board Assembly (PCB)
CC Closed Captioning
CSM Customer Service Mode
CVBS Color Video Blanking Sync
DNR Dynamic Noise Reduction
EEPROM Electrical Erasable Programmable Read-Only Memory
EIA Electronics Industry Association
Error Buffer Register that keeps track of errors that occur and stores error codes
Error Code A numerical value used to indicate a failure in the television
EU Europe
EXT External audio/video input
FM Frequency Modulation
I.F. Intermediate Frequency
I²C Inter IC bus, 2-wire bi-directional (SCL/SDA)
ID Identification
IDENT Horizontal coincidence signal, transmitter identification
IF Intermediate Frequency
IN ITT sound IC with NICAM function
IT ITT sound IC without NICAM function
LATAM Latin America
LED Light Emitting Diode
Local Keyboard The buttons (usually volume up, volume down, channel up, and channel down)
located on the front of the television set
MA Mono All; single mono carrier receiver
NICAM Near Instantaneous Companding Audio Multiplex; Digital Sound System
NR Noise Reduction
NTSC National Television Systems Committee (video)
NVM Non Volatile Memory
OB Option Byte (Feature Byte)
OSD On Screen Display
PCB Printed Circuit Board (CBA)
PIP Picture In Picture
PLL Phase Locked Loop
PP Personal Preference
RAM Random Access Memory
RC Remote Control
RC-5 Remote Control System 5
RGB Red Green Blue
ROM Read Only Memory

SAP Second Audio Program
SCL Serial Clock
SDA Serial Data
SDAM Service Default Alignment Mode
SVHS Super Video Home System
THD Total Harmonic Distortion
Top Level Menu This refers to the main menu (as opposed to sub menus) in SAM
V-Chip Violence-Chip
VCR Video Cassette Recorder
Y/C Luminance/Chrominance (video)
Safety Instructions - Resolder Notice
1 Safety regulations require that during a repair:
• the set should be connected to the mains via an isolating transformer
• safety components, indicated by the symbol:
should be replaced by components identical to the original ones
• when replacing the CRT, safety goggles must be worn
2 Safety regulations require that after a repair the set must be returned in its original condition. In
particular, attention should be paid to the following points:
Note:
This resoldering is advised to prevent bad connections due to metal fatigue in solder joints, and
is therefore only necessary for television sets older than 2 years.
• As a strict precaution, we advise you to resolder the solder joints through which the horizontal
deflection current is flowing, in particular:
- All pins of the line output transformer (LOT)
- flyback capacitor(s)
- S-correction capacitor(s)
- line output transistor
- pins of the connector with wires to the deflection coil
- other components through which the deflection current flows
• Resolder points are marked by a white circle on the bottom of the CBA.
• The wire trees and EHT cable should be routed correctly and fixed with the mounted cable
clamps.
• The insulation of the mains lead should be checked for external damage.
• The mains lead strain relief should be checked for its function in order to avoid touching the
CRT, hot components or heat sinks.
• The electrical DC resistance between the mains plug and the secondary side should be checked
(only for sets which have a mains isolated power supply).
This check can be done as follows:
- unplug the mains cord and connect a wire between the two pins of the mains plug
- set the mains switch to the on position (keep the mains cord unplugged!)
- measure the resistance value between the pins of the mains plug and the metal shielding of
the tuner or the aerial connection on the set. The reading should be between 4.5 Megohm and
12 Megohm.
- switch off the TV and remove the wire between the two pins of the mains plug
• The cabinet should be checked for defects to avoid touching of any inner parts by the customer.
AC Cord Lead Dress

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