Grundig E2000 Series Schematic

GRUNDIG E2000 Series

Recommended Safety Parts

Item Part No. Description

C 100 435515 220n 250Vac 20%
C 114 433001 MKP 2n2 250 Vac 20%
C 124 435017 MKP 470n 400V 10%
IC 104 412092 IC TCDT1101GA
L 100 440516 RFI choke
R 115 428000 MG 10M 1/2W 5%
R145 426017 MFF 1R 1/2W 10%
R 200 426020 MFF 3R3 1/2W 5%
R 205 421004 SMD 0805 10K 5%
R 300 426011 MFF 1K 1/2W 5%
R 302 426001 MFF 0R22 1/4W 5%
R 311 426002 MFF 1R 1/4W 5%
R 314 426013 MFF 6R8 1/4W 5%
R 315 426005 MFF 10R 1/4W 5%
R 330 426015 MFF 68R 1/2W 5%
R 332 426012 MFF 27R 1/4W 5%
R 832 426002 MFF 1R 1/4W 5%
R 904 426018 MFF 47R 1/4W 5%
T 100 274012 SMT 47 10469220
F 100 460004 FUSE 3,15 AT

Safety Specifications

This television set complies with class II safety
specification, indicated by the symbol ***.
After carrying out maintenance work on class II
sets, it is advisable to measure the insulation
resistance and leakage current on sets in
working order, in accordance with the EN 60­065 standard (NF C 92-130).

Measurement of insulation resistance

according to the EN 60-065 standard:

Connect an insulation resistance measuring
instrument (U test = 500V-) simultaneously to
the two poles of the mains plug and all the
accessible metal parts of the television set
(aerial, base etc.)

It is operating correctly if

• Insul. R. ≥ 2 Mohm for U test 500 V-.

• Duration of measurement ≥ 1 second.
Note: Class II sets may be designed with

insulation below 2 Mohm (discharging resistor).

Connections

Measurement of leakage current according to
the EN 60-065 standard:
Connect a milliammeter (U test =220 V-)
simultaneously to both poles of the mains plug
and all the accessible metal parts of the set
(aerial, bases, etc.)

It is operating correctly if:

• leakage current ≤ 1 mA for U test = 220 V-.

• Duration of measurement ≥1 second

Connections

Measurement of insulation resistance (M Ohm)
Measurement of leakage current (mA)

Set Functions

POWER SUPPLY

The supply system is a traditional one with
insulated and autonomous switching. After
rectification and filtering, the supply is applied to
the T100 transformer. The TR101 transistor is
controlled by the IC101 integrated circuit. The
starting voltage of IC101 is taken from the mains
supply by R114, D130, D131 and C124.

Regulation of the supply

Regulation is obtained by comparison between
a resultant of the voltage + 150V (D115), a
voltage fixed by the B+ microprocessor (pin 9
IC501) and a reference voltage internal to CbS.
An error current is generated then transmitted
via IC104 to IC101 (pin 15), which adapts the
width of the drive pulse of TR101. Protection

against overcurrent is provided by comparing a
reference voltage internal to IC101 with a
voltage derived from R113, R116, R117.

Standby mode

The “Standby’ voltage derived from IC501,
switches T102, T100 and activates the D125
thyristor. A voltage derived from T100 (pin 9) is
applied via D124, D125 to IC100, which delivers
a +5V_SBY voltage. In standby mode the value
of the other voltages is reduced by approxi­mately 10 %. T103 switches IC101 in standby
operating mode.

Supplies

Outputs Uses
+ 16.5 V Audio supply.
+ 150 V (+B) Line stage, tuning voltage
+ 12.1 V Line stage
+ 8 V Video and stereo processor

+ 5 V FI, tuner, videoprocessor, audio
+ 5 V_SBY Standby supply for IR receiver,

Supply safety

If there is a short circuit on one of the supplies :
+16.5 V, +12.1 V, +5 V, the uP safeguards the
set.
Note : uP pin 20 voltage: in normal operation:
~ 1 V=, in fault or standby mode : ~ 5 V=

All the secondary supplies are insulated so that
the main heat sinks and external connections
are at earth potential for the safety of the user.

CAREFUL THE HEAT SINK OF TR 101 IS LIVE.

R115 and C114 are insulating components
designed to balance the earth potentials of the
frame (insulated and non-insulated side) and
eliminate HF parasites.

CAUTION: If these parts are changed, it is
essential that they be replaced by manufactur­er’s parts.

THE MICROCONTROLLER

The SDA 5250 microcontroller (IC501) fulfils the
following functions:

- Control of frequency synthesis for the tuner

- Teletext, on-screen graphic display generator

- It has a series-in for the infrared remote
control, and a I2c port for communications
with other integrated circuits

- It manages the switching of the different
modes and options.

The conditions required for correct uP operation
are as follows:

• Supply voltage of 4,8 V on pin 13.

switching
processor and microprocessor.
LED and microprocessor.

• 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.
Pin 2 Switching (A) of IC701 (MICOP02).
Pin 3 Switching 4/3 - 16/9 of vertical stage

(IC200) (ODD/EVEN)
Pin 4 Not in use
Pin 5 Presence of headphones
Pin 6 Switching of Fl inputs of IC602

(SYSTEM)
Pin 7 Adjustment of vertical framing

(U_SHIFT)
Pin 8 Threshold of AGC voltage

(AGC_DRIVE)
Pin 9 Threshold voltage for regulation of

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
Pin 52 Teletext oscillator
to 53
Pin 54 Horizontal and vertical synchro inputs
to 55 (HSYNC) (VSYNC)
Pin 56 SCL (clock) of 12c bus
Pin 57 SDA (data) of 12c bus
Pin 58 Standby switching (STY)
Pin 59 Control line of IC701 (VID_SW)
Pin 60 Control line of IC701 (SCART2_EN)
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 P­to 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
IC602.
The BG/LL’ switching is done by pin 13.
The video output on pin 12 is injected into pin 2
of IC800 after switching in IC701.

THE VIDEO PROCESSOR MC 44002/07
Note : the MC 44007 integrated circuit is

intended for operation on the PAL standard only.
IC800 is a video processor with the basic

functions for a colour television (processing of
chrominance, video and time bases). All the
controls are done via the I2c bus. Access and
setting controls are explained in the chapter on
SERVICE MODE.
Video input is done on pin 2 for the signal
coming from the Fl stage and on pin 4 for
external signals coming from the S-Video and
Video IN sockets.
After separating the chrominance and luminance
signals, R-Y and B-Y (pins 36 and 37) are
applied to the IC801 digital delay line, then to
the IC 802 CTI circuit (improvement of colour
transitions) before being once again injected into
IC 800 (pins 26 and 27).
After mixing with the luminance, then matrixing,
the RGB signals (pins 17, 18, 19) are taken to
the cathode-ray tube via TR801, TR802 and
TR803.
IC also includes the time base circuits, and
delivers raster and line synchronization pulses
(pins 7 and 12). A system of limiting the output
of the cathode-ray tube (beam brake) allows one
to ensure that the video output is still suited to
the characteristics of the latter (pins 9 and 10).
IC800 has a system of automatic correction of
the grey scale level (pin 20).

AUDIO PART

The E2000 frame is equipped, depending on the
type of television set, with a progressive audio
system:

- NICAM digital stereo sets (sets of the type :
CE 70x5), are equipped with the basic audio
system.

- 3D NICAM digital stereo sets (sets of the type:
CE 70x6), are equipped with the basic audio
system plus a Dolby 3D module.

DOLBY SURROUND PRO-LOGIC sets (sets of
the type : CE 70x7), are equipped with the audio
system
plus the DOLBY SURROUND PRO-LOGIC
module.

FI AUDIO DEMODULATION

Fl demodulation is provided by the integrated
circuit IC602 TDA 4470M (BG/LL’ standards) or
TDA 4472M (BG standard).
The FI signal from the tuner goes through the
FOS (SAW600), and arrives on pins 1 and 2 of
IC602. The audio intercarrier output is done on
pin 24 and transmitted to IC1 (pin 58) for
NICAM, FM, 2 tone, double language sounds.
Demodulated AM sound comes out at pin 25
and is transmitted to IC1 (pin 55).
For sound on band I in L’ standard, the Fl signal
arrives at pins 27 and 28 of IC602 via the FOS
(5AW602). The intercarrier output is at pin 24.
The switching of audio inputs is done by pin 3 :
If the voltage of pin 3 is between 0 V and 0.8 V
inclusive, pins 1 and 2 are selected if the voltage
is between 2 V and 5 V inclusive, pins 27 and 28
are active.

AUDIO PROCESSOR MSP 3400C

The MSP 3410D (ICI) is a multisystem audio
processor, capable of decoding NICAM, FM,
stereo, double language or mono signals. The
MSP3400C has the same features, but without
the NICAM decoding. The audio intercarrier is
applied to pin 58 for NICAM, FM sound demodu­lated AM (LL’) sound is applied to pin 55.

The MSP 3410D has an integrated AGC block
which allows it to treat signals situated in the

0.14 V to 3 V range peak-to-peak. The amplified
signal is then transmitted to an A/D converter to
be processed.

The audio processor is able to choose between
several audio inputs:

- FM, NICAM, 2 tone intercarrier AM intercarrier
(France)

- Video input SCART socket 1 (stereo)

- Video input SCART socket 2 (stereo)

- Cinch sockets (stereo)

The audio processor also has two ND convert­ers allowing the connection of:

- Loudspeakers

- Headphones or cinch outputs.

After processing (bass, treble, balance), the BF
signal (pins 28 and 29) is transmitted for
amplification to IC250. Headphone outputs are
on pins 25, 26.

Note : The headphone socket and the audio
OUT sockets (situated at the back of the
television set) are paired. If no headphones are
connected, the BF output level is fixed on these
sockets and allows the television set to be
connected to a hi-fi system, for example. If the
user plugs in some headphones, the BF level is
variable using the V+ or V- buttons, and the
television speakers are cut off.

3D MODULE and *DOLBY SURROUND
PROLOGIC

The 3D and DOLBY SURROUND PROLOGIC
modules are identically equipped. A software
configuration, accessible only in the factory,
allows operation in 3D.

*DOLBY SURROUND PRO LOGIC 3D AUDIO
PROCESSOR - DPL3619A

The stereo signals containing the coded DOLBY
SURROUND PRO LOGIC information are
processed by the IC950 linked with ICI by
means of the PS bus. The BF outputs of the
central and rear paths are supplied by IC950 to
pins 21 and 25.

BF AMPLIFIERS

The final amplification of the left and right paths
is provided by the integrated circuit TDA 7297
(IC250).
BF inputs by pin 4 for the right-hand path and
pin 12 for the left-hand path, amplified outputs
on pins 1 and 2 for the right-hand channel, on
pins 14 and 15 for the left-hand channel
(symmetrical outputs).
Output impedance : 8 Ohm)

The final amplification of the centre and rear
paths, for DOLBY SURROUND PRO LOGIC
provided by the integrated circuit TDA 7297
(IC550).
BF inputs by pin 4 for the centre path and pin 12
for the rear path, amplified outputs on pins 1
centre path, on pins 14 and 15 for the rear path
(symmetrical outputs).
Output impedance of the centre path : 8 Ohm
Output impedance of the rear path :16 (Ohm or
2 8 Ohm loudspeakers mounted in a series
circuit.

TELETEXT

The teletext decoder circuit is integrated in
IC501 (microcontroller). The decoder has a
capacity of 8 pages of teletext and will automati­cally detect the FLOF and TOP modes.

REMOTE CONTROL KEYS

1) Placing on standby and restarting the

television set

2) Numerical buttons: direct selection of

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 sub­menu 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 repeat­edly.

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

GRUNDIG E2000 Series

Channel Setting Cont’d

selected is highlighted). Use the V+, V-

buttons (4) to modify settings (eg. programme
number, channel number, etc.)

• Select the line Programme, type the pro­gramme number using the numbered buttons
(2) or the P+, Pbuttons (3).

• To modify the standard, if necessary, for sets
with this function. Select the line STANDARD,
use the buttons V+, V- (4) to change the
reception standard : LL’ for French channels,
BG, I/I’ for other European channels.

• Select the line Channel, if the channel you are
looking for is brodcast in the Cable Networks
standard, press the GREEN button (13), the
display will change from C-- to S-- (the same
button allows you to come back to the C-­display): C for hertz reception, S for satellite
reception.

• Type the channel number using the numbered
buttons (2), as a two digit number (eg. C2­first), then the second digit (eg. C25). For
channels between 0 and 9 type 0 instead of
the first digit (eg. S05).

• If you do not know the channels in your area,
it is possible to do an automatic search as
follows:

Hold down the V+ button (4), the channel search
is carried out step by step in ascending order or
in descending order with the V- button (4). The
search stops as soon as a transmitter is found.
If the channel is not what you want, start the
search again as before.

Note: the UHF, VHF1 and VHF3 bands are
automatically explored (depending on the
country).

buttons (4).

• To store the settings and quit service mode,
press UPDATE button (7).

• To quit service mode without storing, press the
TV button (18).

• To go from one page of the service menu to
another, press the MENU button (5).

Particularity: the selection of the G2 function
has the effect of masking page 1 of the service
mode, with only G2 remaining on the screen.
The contrast value (maximum) and brightness
(minimum) are adjusted automatically. Pressing
on the P+ or P- buttons (3), to choose another
function, will display page 1 again.

Explanations of Functions
Note: before changing IC502, note the values

and selections defined in service mode (pages 1
and 2) in order to be able to program them back
in as soon as the IC502 replacement has been
carried out.

R, G, B settings: depending on the type of
cathode-ray tube the values defined are as
follows:

Panasonic Philips
66 EAK 071X11 66 ECF 50X05

R 53 Steps 50 Steps
G 38 Steps 39 Steps
B 38 Steps 33 Steps

Page 1

Page 2 (Press the MENU button once).

( ) Settings defined in the factory.

• Store by pressing the BLUE button (15). The
<<blue>> block (dialogue line) will display OK
for about one second (to signal storing)
before displaying STORE again. Proceed in
the same way for all the channels.

Fine tuning

The channel is automatically tuned to its
optimum setting, although certain local condi­tions of reception may make however a
deviation necessary. The channel must then be
fine tuned. The fine tuning is made by succes­sive jumps (±63 steps) of 62.5 Khz each.

• Select the line FINE TUNING using the P+ or
P- buttons (3).

• Change the setting using the buttons V- (4)
(negative fine tuning) or V+ (4) (positive fine
tuning).

• Store as before.

Service Mode

The service mode is specially designed for the
maintenance of the television set. It allows the
main geometry, white balance, AGC, G2 and
frame configuration adjustments, etc. to be
carned out.
To activate service mode, hold down the buttons
P+ and P- [3] (on the front of the set), then
switch on the television set by pressing the on/
off button [1], until the picture appears. The
service menu appears on the screen.
In order to select the different functions and to
modify the settings, the use of the remote
control is essential.

Dolby Amp RC Diagram

Amp RL Diagram

The function Vert lin is automatically selected.

• To choose a function in service mode, press
the P+ or P- buttons (3).

• To modify the setting, press the V+ or V-

GRUNDIG E2000 Series

Audio Diagram

Dolby Diagram

CRT Diagram