THOMSON ICC 9 Service

RTV servis Horvat

Tel: ++385-31-856-637
Tel/fax: ++385-31-856-139
Mob: [phone]

www.rtv-horvat-dj.hr

Service tips

for

CHASSIS

ICC 9

TCE

SABA

BRANDT

THOMSON

FERGUSON

NORDMENDE

TELEFUNKEN

1.

Microprocessor sofware version and teletext board compatibility.
The technical help line engineers have reported several cases where different fault conditions have arisen after the
replacement of the microprocessor or the text board, these have been either no teletext operation, no remote control
functions, the television will not come out of the standby mode or even a description of a tripping type fault.
In most cases it has been found that the cause of the problem is due to incompatibility between the microprocessor's software
version and the teletext board. If you find it necessary to replace either the microprocessor or the teletext board, the following
table will enable you to avoid any of the above-mentioned problems arising after replacing the retrospective devices.
Micro software version type: C9-20 Main chassis sub code: ICC9 280 Teletext PCB type no: DVT 9002
Micro software version type: C9-20 Main chassis sub code: ICC9 777 Teletext PCB type no: DVT 9002
Micro software version type: C9-20 Main chassis sub code: ICC9 270 Teletext PCB type no: DVT 9002
Micro software version type: C9F-25 Main chassis sub code: All Chassis Types Teletext PCB type no: DVT 9003
Identification of the microprocessor software version is via the last four digits after the part number of the IC, i.e. 10177300­C9-20
The teletext board type number is printed on a white label, stuck generally on the component side of the PCB.
The main chassis identification number is silk screen printed on the component side along the front edge of the PCB ie. to the
left of the chopper power supply circuit.
Teletext access time - alternative memory device.
1: A problem which affects the access time and the data acquisition cycle for both fastext links and index pages on earlier
versions of the Teletext PCBs can be overcome by removing the memory device used at location IT03 and fitting an
alternative device at location IT02. After removing IT03, check the copper tracks for s/cs. Fit new memory device IT02,
check the copper track for s/cs.
The alternative memory device (HY53C464LS-80/LH2464-10) is available under part no. 46157900.
Note: Whilst handling the teletext PCB and the new memory device, ensure that the workplace is correctly protected against
static discharge and the equipment used conforms to the latest Health and Safety at Work Regulation.

Access to service mode

1. Switch TV on using on/off switch on set.

2. Switch to standby using hand set.

3. Switch TV off using on/off switch on set.

4. Press bl ue text key on handset whilst switching TV on using on/off switch.

5. Enter service menu by pressing blue key. Menus: SETUP = TV settings
VIDEO = video adjustments GEOMETRY = Geometry adjustments
RESTORE--- This will retrieve the previous hex value in NVM if this has been altered during adjustment. It will not
return values if they have been stored.
ROM---- This will return NVM to default settings.
VOLT--- This must not be adjusted using +/- keys on handset but using +/-buttons o n TV
VOLT Usys. Cathode DP61 154V=33" 29" 25" (4/3)
145V= 21" (110°)
121V= 21" (90°)
165V = 32" (16/9)
UHF/VHF head.
Two types of head have been used on this appliance: MTP MM-2014/01 (code 503TX0491) and MTP-4015F (code
503TX0491). The latter version has a grounding point between pins 3 and 4.
Production changes - Power supply circuit. Following components have be en removed during production :
Diode DP58 (ZPD 30V)
Diode DP59 (LS4148)
On non-modified appliances, a loss at DP58 level may cause appliance to switch off at random.
Production changes - Control panel. On these appliances two types of control panel have been used:
Type one: Membrane control panel (part no.: 103TX1130) combined with following elements: board FCB9016 (part no.:
596TX3476); intermediate 10 key panel (part no.: 103TX1736); panel holder (part no.: 103TX2238).
Type two: Contactor control panel (part no.: 103TX3036) combined with following elements: board FCB9054 (part no.:
596TX4074); 8 way ribbon connector.
Method to be applied to check power supply is in low voltage.
Unsolder pin 3 from line transformer and check power supply secondary. Suspect DATA and CLOCK on IR01 pin 1 and
2:5Vpp.
Contents of power supply repair kit.
Part number: 35029320.
DESCRIPTION CIRC REF NO QTY

2.2nF/1K CP13 1

Usefull info

2.

BA157 (BY201) DP23 1
1A6AT fuse FP01 1
TEA2261 IP01 1
BUV48CFI (ON4915) TP10 1
Contents of surface mounted transistor kit.
Part number: 35029260.
DESCRIPTION QTY PART NO
BC848B 10 35036730
BC848C 10 35036130
BC857B 10 35036740
BC858C 10 35036760
BC858C 10 35036780

Contents of TV fusible safety resisto r kit No 2.
Part number: 35029150.
DESCRIPTION QTY PART NO
0R1/0.40W 10% 10 35038230
0R33/0.40W 10% 10 35038240
0R39/0.50W 5% 10 35038250
1R/0.40W 5% 10 35038260
1R5/0.50W 5% 10 35038270
3R3/0/35W 5% 10 35038340
8R2/0.50W 5% 10 35038350
10R/0.25W 5% 10 35038280
15R/0.50W 5% 10 35038290
22R/0.25W 5% 10 35038320
27R/0.30W 5% 10 35038330
180R/0.30W 5% 5 35038300
1K/0.50W 5% 5 35038310

General information.
. Year of manufacture of appliance : 1997-1998

After PSU was checked according to the info, protective circuits can be switched off (see below) Warning: various vertical
ICs <--> Cs.
If pin 19 of IV01 (STV 2160) is unsoldered, protective circuit (no. 3?) is put out of operation. If you bridge base and emitter
of TP69, protective circuit no. 2 is put out of order.

Working in safety mode.
IV01 communicates with IR01 via the data leads that a fault is present. Then the operating voltages pin 13: 24.5V, pin 33:

38.5V are present but crystal does not oscillate. Switch off protective circuit, unsolder pin 19 IV01. In the PSU LP44 can be
unsoldered then PSU works in pulse mode as in stand by. Then Usys is approx 127V.

Modifications - chroma circuit IV01.
In this position, two types of video processors were used successively:
Type 1: STV2160-AF or AG, CG (part no. 276TX4609) with a specific value of CV46(*): chip capacitor (10nF) (pin 20 of
IV01).
Type 2: STV2160-AK or DA, BK, CK, DK (part no. 276TX4848) with specific value of CV46(*): chip capacitor 33nF (pin
20 of IV01).
(*) An incorrect value of CV46 causes vertical instability of the picture. NB: The position of CV46 indicated in the technical
documentation I CC9 is the wrong way round.

Power supply circuit. Reliability of TP10.
This is improved due to replacement of transistor BUH713TH (part no. 270TX2463) with a new type BUV48CFI/TH (part
no. 270TX2757).
NB: Appliances manufactured now contain these modifications.

3.

Power

Mains transistor TP10 fails repeatedly.
1: It is possible that CP13 has a loss of capacity or dry joints.
Change TP10 from BUH713 to BUV46CFI (10274170).
Power supply repair set 10268050.

Appliance does not start from standby, but pumps once.
1: IA01 (TDA2616, audio output stage) is defective.

Line output transistor TL19 failure.
1: Random failure of line output transistor TL19 for no detectable fault condition, could possibly be attributed to intermittent
failure of a diode at location DL61 type 1N4001. It has been found in production that this device can suffer mechanical
stress, problems which can arise are intermittent O/C or high forward junction resistance of diode.
In the event of either of these fault conditions occuring, the results are that the supply rail to the line driver stage will be
incorrect and as a result, the drive waveform to the base of line output transistor TL19 will be incorrect.
Detection of this fault condition is somewhat difficult so it is recommended that this diode be replaced as a matter of safety
and reliability of the line output device.
2: Replace DL64, DL65, DL66, DL67, DL68, DL69, DL70 CL63 and RL60..
3: Check IC (TDA8172).

CRT video drive IC failure.
1: to improve the reliability of the video driver integrated circuit IB01, type number TEA 5101A, further static protection
has been introduced in production by the addition of three BAV21 diodes allocated reference numbers of DB32, DB52 and
DB72 respectively. These devices are available from Ferguson under part no: 16007470.
It is recommended that this safety measure is incorporated after replacement of IB01, mounting of these diodes must be
carried out on the copper side of the PCB. Insulation must also be provided for both diodes and associated circuitry to
prevent accidental short circuits taking place in reassembly.
Also associated with this is Technical Bulletin T0008 (Static Protection for Video Processor IV01) please read and also, if
necessary, carry out this additional static flashover protection for IV01.

Power supply functions but does not start up.
1: Replace RV06 (680R 207TX3459). Remove DP58 and DP59. Check DP84 (1N5817 273TX2493), CP84 (220nF).

Pumps three times then goes into safety mode, red LED lights up.
1: [Line transformer, IV01, IF01, DP72, DP35 have been changed]. Check DL21, RL45 and TL40. Suspect DF32 or check
power supply. Unsolder line BU.

Appliance does not start up. System voltage collapses at 80V as soon as the aerial is connected or the menu is displayed on
the screen and appliance goes into safety mode. Normal scanning without aerial.
1: Change CL23 (8.2nF).

Primary goes into safety mode at start up.
1: The voltage at pin 16 of the TEA2261 is higher than 15.7V at start up. Change DP35 (1N4148).

At start up the appliance will not come on.
1: CP72 (4.7µF) is dry.

Occasionally appliance goes into safety mode.
1: Check TP66, TP67 and TP69.

Occasionally apliance goes into safety mode or trips.
1: Change DV001 (1N4001).

TL19 blows after 5 secs.
1: [Line transformer has been replaced. Driver, tuning capacitors, etc have been checked but nothing found]. Replace
BUH157 TH by original part.
Ref. 270TX2515.

No 13V at start up.
1: Check 13V on DL13. If not, check CL14. Replace DP84 by IN5817, CP84 (220µF). Check RV08 (680R) between the
base and collector of TV06.

Power supply functions but voltage is reduced. 26V goes to 13V and 151V to 120V. 10V STBY 5V ok. Standby light still
remains on and starts up occasionally.
1: [IP01, STV2160, TV06, TR80, DP82, CP82, DV01, RV01 checked]. Remove audio module. If the same, unsolder pin 11
from IF module or unsolder pin 2 from line transformer. Suspect IF01 and line transformer.

Power supply blips when switched on.
1: Check pin 5 of IF01 (TDA8172) for s/c.

Pumps two or three times then dead. Red LED off. Functions if 8V connected to CP72. DP72 ok.
1: [CP72 replaced]. Unsolder line BU. Check DP03:20V, DP61: U SYS, DP82:26V. Check raster circuit and audio module.

Appliance comes on for a second.
1: Replace TDA8172 chip.

Power supply blocks at start up.
1: Check if scanning BUH517 is S/C. DL61 O/C. To determine the fault, fit transistor TL65 S/C E.C, otherwise BUH blows
again instantly.

Remains in standby. 128V, 9V and 5V ok. No start up of line BU.
1: Replace RV06 by another 680R (ref. 207TX3459). Remove DP58 and DP59.

IC (TEA5101) fails repeatedly.
1: Fit two diodes between ground (anode side) and pins 5 and 7 of IC (TEA5101) (cathode side).

Power supply blows. Standby LED flashes red each second. No oscillation on line BU. No horizontal drive on pin 32 of IV01
(STV2160). 0V at the spot of the line pulses.
1: Replace coil LL10 and diode DL61.

Standby LED flashes red/green every second. Appliance pulses three times. Line transformer starts up then cuts out. Pulses
on line BU correct.
1: Pin 19 of IV01 at 0V. Protection circuit is defective. Check if transistor TP66 (BC858) O/C or if TP69 (BC848) leaky.

Standby LED lights up red then goes off. U system only increases to 100V before tripping. Pulses on line BU increase to
800V before going into safety mode.
1: Replace recovery diode DL21 which is leaky.

FBT tries to start up but po wer supply does not increase enough and do es not regulate.
1: Power supply regulation circuit TP52 (BC848) is defective. Regulation transformer LP44 O/C.

Power supply goes into safety mode. No apparent S/C on the power supply.
1: Poor regulation on primary circuit. Diode DP31 (LL4148) is leaky.

No FBT. Red standby LED lit. No 8V on pin 13 of IV01. Circuit breathing active (0V at pin 19 of IV01).
1: Check if TP66 (BC858) and TP69 (BC848) S/C.

"Beep" from power supply at switch on then goes into safety mode.
1: Check if diode DP31 (LL14148) is defective or if line BU transistor is resistive. If line BU is defective, replace diode
DL61. No apparent S/C on secondary.

BU and line transformer blow again.
1: DL61 (1N4001) O/C. Also check CL21 and CL22. Track O/C on 7.5V.

Poor start up, PC and bus after repalcing uP.
1: uP versions vary according to product references and are incompatible. Check TX code of uP according to appliance
reference.

No HT. No reception via RC. Standby light lit red. Clock ok.
1: No data. Remove sound board. If TV functions correctly, check audio board and replace TDA.

4.