Grundig E2000 Series Wiring Diagrams

GRUNDIG E2000 Series
Recommended Safety Parts
Item Part No. Description
C 100 435515 220n 250Vac 20%
C 114 433001 MKP 2n2 250
C 124 435017 MKP 470n 400V
IC 104 412092 IC TCDT1101GA
L 100 440516 RFI choke
R 115 428000 MG 10M 1/2W
R145 426017 MFF 1R 1/2W
R 200 426020 MFF 3R3 1/2W
R 205 421004 SMD 0805 10K
R 300 426011 MFF 1K 1/2W
R 302 426001 MFF 0R22 1/4W
R 311 426002 MFF 1R 1/4W
R 314 426013 MFF 6R8 1/4W
R 315 426005 MFF 10R 1/4W
R 330 426015 MFF 68R 1/2W
R 332 426012 MFF 27R 1/4W
R 832 426002 MFF 1R 1/4W
R 904 426018 MFF 47R 1/4W
T 100 274012 SMT 47 10469220
F 100 460004 FUSE 3,15 AT
against overcurrent is provided by comparing a
Safety Specifications
reference voltage internal to IC101 with a
voltage derived from R113, R116, R117.
This television set complies with class II safety
specification, indicated by the symbol ***.
Standby mode
After carrying out maintenance work on class II
The "Standby' voltage derived from IC501,
sets, it is advisable to measure the insulation
switches T102, T100 and activates the D125
resistance and leakage current on sets in thyristor. A voltage derived from T100 (pin 9) is
working order, in accordance with the EN 60- applied via D124, D125 to IC100, which delivers
065 standard (NF C 92-130).
a +5V_SBY voltage. In standby mode the value
of the other voltages is reduced by approxi-
Measurement of insulation resistance
mately 10 %. T103 switches IC101 in standby
according to the EN 60-065 standard: operating mode.
Connect an insulation resistance measuring
instrument (U test = 500V-) simultaneously to Supplies
the two poles of the mains plug and all the
accessible metal parts of the television set
Outputs
(aerial, base etc.)
+ 16.5 V
+ 150 V (+B)
It is operating correctly if + 12.1 V
• Insul. R. ≥ 2 Mohm for U test 500 V-.
+ 8 V
• Duration of measurement ≥ 1 second.
+ 5 V
Note: Class II sets may be designed with
insulation below 2 Mohm (discharging resistor). + 5 V_SBY
Connections
Measurement of leakage current according to
Supply safety
the EN 60-065 standard:
If there is a short circuit on one of the supplies :
Connect a milliammeter (U test =220 V-) +16.5 V, +12.1 V, +5 V, the uP safeguards the
simultaneously to both poles of the mains plug set.
and all the accessible metal parts of the set Note : uP pin 20 voltage: in normal operation:
(aerial, bases, etc.)
~ 1 V=, in fault or standby mode : ~ 5 V=
It is operating correctly if: All the secondary supplies are insulated so that
• leakage current ≤ 1 mA for U test = 220 V-.
the main heat sinks and external connections
• Duration of measurement ≥1 second
are at earth potential for the safety of the user.
Connections
CAREFUL THE HEAT SINK OF TR 101 IS LIVE.
Measurement of insulation resistance (M Ohm)
R115 and C114 are insulating components
Measurement of leakage current (mA) designed to balance the earth potentials of the
frame (insulated and non-insulated side) and
eliminate HF parasites.
Set Functions
CAUTION: If these parts are changed, it is
POWER SUPPLY
essential that they be replaced by manufactur-
The supply system is a traditional one with
er's parts.
insulated and autonomous switching. After
rectification and filtering, the supply is applied to
THE MICROCONTROLLER
the T100 transformer. The TR101 transistor is
The SDA 5250 microcontroller (IC501) fulfils the
controlled by the IC101 integrated circuit. The
following functions:
starting voltage of IC101 is taken from the mains
- Control of frequency synthesis for the tuner
supply by R114, D130, D131 and C124.
- Teletext, on-screen graphic display generator
- It has a series-in for the infrared remote
Regulation of the supply
control, and a I2c port for communications
Regulation is obtained by comparison between
with other integrated circuits
a resultant of the voltage + 150V (D115), a
- It manages the switching of the different
voltage fixed by the B+ microprocessor (pin 9
modes and options.
IC501) and a reference voltage internal to CbS.
The conditions required for correct uP operation
An error current is generated then transmitted
are as follows:
via IC104 to IC101 (pin 15), which adapts the
width of the drive pulse of TR101. Protection
• Supply voltage of 4,8 V on pin 13.
• Clock frequency of 18 MHz on pins 14 an 15.
• Reset pulse on pin 16.
• Bidirectional I2c bus: SCL clock line (pin 56),
data line (pin 57).
IC501 pins
Pin 1 NC.
Vac 20%
10%
Pin 2 Switching (A) of IC701 (MICOP02).
Pin 3 Switching 4/3 - 16/9 of vertical stage
(IC200) (ODD/EVEN)
5%
Pin 4 Not in use
10%
5%
Pin 5 Presence of headphones
5%
Pin 6 Switching of Fl inputs of IC602
5%
(SYSTEM)
5%
5% Pin 7 Adjustment of vertical framing
5%
(U_SHIFT)
5%
Pin 8 Threshold of AGC voltage
5%
5% (AGC_DRIVE)
5%
Pin 9 Threshold voltage for regulation of
5%
supply (B+)
Pin 10 Switching of the Bd I L' standard (SYS)
Pin 11 BG/LL' switching (CVBS_MOD)
Pin 12 Earth
Pin 13 VDD(4-4.8V)
Pin 14 18 Mhz oscillator
Pin 15 18 Mhz oscillator
Pin 16 uP reset
Pin 17 Address and data lines of IC500
Pin 18 Address and data lines of IC500
Pin 19 Address and data lines of IC500
Pin 20 Supply safety
Pin 21 Address and data lines of IC500
to 44
Pin 45 On-screen graphic incrustation
to 48
Pin 49 NC.
Pin 50 Earth
Pin 51 VDD (+5 V SBY) uP supply in
standby mode
Uses
Pin 52 Teletext oscillator
Audio supply.
to 53
Line stage, tuning voltage
Pin 54 Horizontal and vertical synchro inputs
Line stage
to 55 (HSYNC) (VSYNC)
Video and stereo processor
Pin 56 SCL (clock) of 12c bus
switching
Pin 57 SDA (data) of 12c bus
FI, tuner, videoprocessor, audio
Pin 58 Standby switching (STY)
processor and microprocessor.
Pin 59 Control line of IC701 (VID_SW)
Standby supply for IR receiver,
Pin 60 Control line of IC701 (SCART2_EN)
LED and microprocessor.
Pin 61 Not in use
Pin 62 Not in use
Pin 63 UHF switching (see note)
Pin 64 Pin 8 socket AV2 voltage detection
(SC2_PIN8)
Pin 65 Pin 8 socket AV1 voltage detection
(SC1_PIN8)
Pin 66 AGC time constant
Pin 67 AFC voltage input
Pin 68 Earth
Pin 69 PLL filter for TXT and VPS
Pin 70 PLL filter for TXT
Pin 71 PLL filter for VPS
Pin 72 Teletext supply
Pin 73 PLL reference
Pin 74 Video input for teletext (AV-CVBS)
Pin 75 Matrix for the V+, V-, P+ and P- buttons
on the front panel of the set
Pin 76 Audio mute (SPEAK_MUTE)
Pin 77 Matrix for the V+, V-, P+ and P-
to 78buttons on the front panel of the set
Pin 79 Series-in receiving orders from the
remote control
Pin 80 Matrix for the V+, V-, P+ and P- buttons
on the front panel of the set
FI VIDEO DEMODULATION
FI demodulation is provided by the integrated
circuit IC602 TDA 4470M (BG/LL' standards) or
TDA 4472M
(BG standard).
The AGC voltage for the tuner is supplied to pin
11 of IC602.
The threshold of the AGC voltage, fixed by the
uP (IC501) arrives on pin 10 of the IC602.
The Fl signal from the tuner, after going through
the FOS (SAW601), arrives on pins 6 and 7 of The MSP 3410D has an integrated AGC block
IC602. which allows it to treat signals situated in the
The BG/LL' switching is done by pin 13. 0.14 V to 3 V range peak-to-peak. The amplified
The video output on pin 12 is injected into pin 2 signal is then transmitted to an A/D converter to
of IC800 after switching in IC701. be processed.
THE VIDEO PROCESSOR MC 44002/07 The audio processor is able to choose between
several audio inputs:
Note : the MC 44007 integrated circuit is - FM, NICAM, 2 tone intercarrier AM intercarrier
intended for operation on the PAL standard only. (France)
- Video input SCART socket 1 (stereo)
IC800 is a video processor with the basic - Video input SCART socket 2 (stereo)
functions for a colour television (processing of - Cinch sockets (stereo)
chrominance, video and time bases). All the
controls are done via the I2c bus. Access and The audio processor also has two ND convert-
setting controls are explained in the chapter on ers allowing the connection of:
SERVICE MODE. - Loudspeakers
Video input is done on pin 2 for the signal - Headphones or cinch outputs.
coming from the Fl stage and on pin 4 for
external signals coming from the S-Video and After processing (bass, treble, balance), the BF
Video IN sockets. signal (pins 28 and 29) is transmitted for
After separating the chrominance and luminance amplification to IC250. Headphone outputs are
signals, R-Y and B-Y (pins 36 and 37) are on pins 25, 26.
applied to the IC801 digital delay line, then to
the IC 802 CTI circuit (improvement of colour Note : The headphone socket and the audio
transitions) before being once again injected into OUT sockets (situated at the back of the
IC 800 (pins 26 and 27). television set) are paired. If no headphones are
After mixing with the luminance, then matrixing, connected, the BF output level is fixed on these
the RGB signals (pins 17, 18, 19) are taken to sockets and allows the television set to be
the cathode-ray tube via TR801, TR802 and connected to a hi-fi system, for example. If the
TR803. user plugs in some headphones, the BF level is
IC also includes the time base circuits, and variable using the V+ or V- buttons, and the
delivers raster and line synchronization pulses television speakers are cut off.
(pins 7 and 12). A system of limiting the output
of the cathode-ray tube (beam brake) allows one 3D MODULE and *DOLBY SURROUND
to ensure that the video output is still suited to PROLOGIC
the characteristics of the latter (pins 9 and 10). The 3D and DOLBY SURROUND PROLOGIC
IC800 has a system of automatic correction of modules are identically equipped. A software
the grey scale level (pin 20). configuration, accessible only in the factory,
allows operation in 3D.
AUDIO PART
The E2000 frame is equipped, depending on the *DOLBY SURROUND PRO LOGIC 3D AUDIO
type of television set, with a progressive audio PROCESSOR - DPL3619A
system: The stereo signals containing the coded DOLBY
- NICAM digital stereo sets (sets of the type : SURROUND PRO LOGIC information are
CE 70x5), are equipped with the basic audio processed by the IC950 linked with ICI by
system. means of the PS bus. The BF outputs of the
- 3D NICAM digital stereo sets (sets of the type: central and rear paths are supplied by IC950 to
CE 70x6), are equipped with the basic audio pins 21 and 25.
system plus a Dolby 3D module.
BF AMPLIFIERS
DOLBY SURROUND PRO-LOGIC sets (sets of The final amplification of the left and right paths
the type : CE 70x7), are equipped with the audio is provided by the integrated circuit TDA 7297
system (IC250).
plus the DOLBY SURROUND PRO-LOGIC BF inputs by pin 4 for the right-hand path and
module. pin 12 for the left-hand path, amplified outputs
on pins 1 and 2 for the right-hand channel, on
FI AUDIO DEMODULATION pins 14 and 15 for the left-hand channel
Fl demodulation is provided by the integrated (symmetrical outputs).
circuit IC602 TDA 4470M (BG/LL' standards) or Output impedance : 8 Ohm)
TDA 4472M (BG standard).
The FI signal from the tuner goes through the The final amplification of the centre and rear
FOS (SAW600), and arrives on pins 1 and 2 of paths, for DOLBY SURROUND PRO LOGIC
IC602. The audio intercarrier output is done on provided by the integrated circuit TDA 7297
pin 24 and transmitted to IC1 (pin 58) for (IC550).
NICAM, FM, 2 tone, double language sounds. BF inputs by pin 4 for the centre path and pin 12
Demodulated AM sound comes out at pin 25 for the rear path, amplified outputs on pins 1
and is transmitted to IC1 (pin 55). centre path, on pins 14 and 15 for the rear path
For sound on band I in L' standard, the Fl signal (symmetrical outputs).
arrives at pins 27 and 28 of IC602 via the FOS Output impedance of the centre path : 8 Ohm
(5AW602). The intercarrier output is at pin 24. Output impedance of the rear path :16 (Ohm or
The switching of audio inputs is done by pin 3 : 2 8 Ohm loudspeakers mounted in a series
If the voltage of pin 3 is between 0 V and 0.8 V circuit.
inclusive, pins 1 and 2 are selected if the voltage
is between 2 V and 5 V inclusive, pins 27 and 28 TELETEXT
are active. The teletext decoder circuit is integrated in
IC501 (microcontroller). The decoder has a
AUDIO PROCESSOR MSP 3400C capacity of 8 pages of teletext and will automati-
The MSP 3410D (ICI) is a multisystem audio cally detect the FLOF and TOP modes.
processor, capable of decoding NICAM, FM,
stereo, double language or mono signals. The REMOTE CONTROL KEYS
MSP3400C has the same features, but without 1) Placing on standby and restarting the
the NICAM decoding. The audio intercarrier is television set
applied to pin 58 for NICAM, FM sound demodu- 2) Numerical buttons: direct selection of
lated AM (LL') sound is applied to pin 55. programme numbers and pages in teletext
mode.
3) Selection (+ or -) of programmes:
Selection of lines in the different menus.
Selection (+ or -) of page numbers in teletext
mode. Rapid scrolling of programmes, menu
lines and teletext pages when the button is held
down.
4) Setting (+ or -) of sound volume. Modification
of settings in the different menus.
5) Access to the different menus by pressing
repeatedly.
6) Access to the channel tuning menu.
7) Store button in channel setting mode, sort
menu.
8) Button to stop scrolling of multiple pages on
one sub-page in telextext mode
9) Button for cutting out and restarting the
sound.
10) On-screen display button:
- for programme number.
- for masked information in teletext mode.
11) Allows the summary page to be displayed in
telextext mode.
12) Direct access button to picture menu orto
submenu in teletext mode.
13) Direct access button to audio menu orto
submenu in teletext mode.
14) Direct access button to function menu orto
submenu in teletext mode.
15) Direct access button to sort menu orto sub-
menu in teletext mode.
16) Mono/stereo or language I/Il selection.
17) Teletext mode button; press again to incrust
the text in the picture, and again to return to
normal teletext mode.
18) Button allowing a return to TV mode from
the different menus or from teletext mode.
19) Button allowing the doubling of the size of
the teletext characters by pressing once to
display the top half of the page and again for the
bottom half and again to return to normal
display.
20) Numerical button 0 and selection of
positions of AV programme by pressing repeat-
edly.
Channel Setting
Automatic search
• Press the TUNE button (6) for 3 seconds, the
SETTING menu is displayed.
• Press the GREEN button (13), the AUTO
menu appears and the search starts.
When the automatic search is finished, the
SORT menu appears (see instructions).
Manual search
You may use this method if you know the
channels in your area.
• Press the TUNE button (6) for 3 seconds, the
SETTING menu will appear.
• Press the YELLOW button (14), the MANUAL
menu appears.
Example of display:
Manual
Programme 01
Channel C 60
Standard LL' (Light displayed only on sets
with several reception
standards)
Band UHF
Fine Tuning 00
Tuning -----I-----
RED: -
GREEN: RF/Cable
YELLOW: Exit
BLUE: Store
• To move between different menus, use the P+,
P- buttons (3) to select the option (the option