TV
Repair Database
|
Daewoo |
CP310 |
St/by only - relay clicks at sw on |
Replace HT pot VR801 4k7, D807 BYV95C, Q801 2SD1555 & I801 chopper chip
TDA4601 & check for dry joints |
|
Daewoo |
CP330 |
Jumps chans and sound varies |
24C08P Eprom memory chip IV02 - use Daewoo type |
|
Daewoo |
CP330/CP365 |
Magenta cast after I501 replacement |
I501 TDA4661 chroma delay line chip could be faulty |
|
Daewoo |
CP330/CP365 |
No pic or line drive |
Check drive pin 37 I701 TDA8362B, if none check 8.2v pin 36, if present
replace chip, if absent check R401/2, D401 |
|
Daewoo |
CP330/CP365 |
Txt absent/garbled |
XT01 27Mhz Xtal |
|
Daewoo |
CP340 |
Int sw off |
TOP210PFI, I807 |
|
Daewoo |
CP365 |
Int loss of signals - OSD ok |
Dry joints chopper tfmr |
|
Daewoo |
CP365 |
Int signals |
Dry joints sec of chopper tfmr |
|
Daewoo |
CP380 |
Blank raster, no sound, osg or r/c when first switched on (OK after
re-switched on) |
Earth speakers/grill to crt rimband |
|
Daewoo |
CP760 |
pic displaced to left |
crack in pin 10 loptx - no fback pulse to line gen AFC loop |
|
Daewoo |
CP775 |
Dead - lop tr Q401 2SD1880 s/c |
C416 blue disc cap 680pf 2kv s/c. D503 1N4148 s/c; RC527 10R chip res; R503
10k; R409 4k7 were cause of problem |
|
Daewoo |
CP775 |
Dead with psu running |
No or low line drive at base Q402 line dr - check Trs Q405 2SA854 & Q406
2SC945 for leak |
|
Daewoo |
CP775 |
NICAM cracles |
replaced SAWF for analogue type to prevent operation - bodge! |
|
Daewoo |
CP775 |
No signals - fault in tuner |
. replace 4-legged device ( dual gate FET SMD transistor marked MOs )
inside the tuner near aerial input. I used generic BF998 marked Mop |
|
Daewoo |
CP775 |
Pic slow to come on - sound ok |
Replace TDA8375A jungle chip |
|
Daewoo |
CP775 |
Various faults on chan change; eg E-W, blank raster, snow or st/by |
data line down to 4V (must be 5V) - D708 5.6V zener is leaky Also replace
D709 5.6V zener to be on the safe side. |
|
Daewoo |
DMQ1454P |
Storing of tuning or analogue levels inop |
D912, D903 leaky & check tactile switches for leakage |
|
Daewoo |
DMQ2057 |
Bright smeary pic |
190v to RGB low - C426 3µ3 250v |
|
Daewoo |
DMQ2059 |
Int trip |
On/Off sw momentary contacts perm connected |
|
Daewoo |
DMQ2072 |
No signals & no OSD |
R256 18R o/c in st/by reg cct |
|
Daewoo |
DMQ2159 CP315 |
Excess brill with fb lines at sw on - ok when heated |
C426 3µ3 250v in 190v supply |
|
Daewoo |
DTE28G7GB CP785 |
No sound/pic - psu & line drive ok |
TDA8385J FOP chip faulty |
|
Daewoo |
DVF522P |
Dead |
Check/replace C53 1µ 100v, D63 RD16F or MA7160 16v zener, C64 680µ 16v, |
|
Daewoo |
DVT1482P |
Dead |
F4AH fuse o/c, chopper tr 2SD2499 s/c - used 2SD1555 in lieu, C811 100µ 16v
hi esr, 220µ 25v hi esr |
|
Daewoo |
DVT1482P |
Dead - mains fuse blackened & Chopper Tr s/c |
TDA4601 control chip & C811 100µ 35v |
|
Daewoo |
DVT1482P |
Dead with burning smell |
LOPTx |
|
Daewoo |
DVT1482P CP310 |
Sound absent in TV mode - ok in pback |
Check RHS edge connector for dry joints/damaged print on video unit |
|
Daewoo |
DVT2082P |
Int dead |
Dry joint C817 100µ - remove plastic strut to see |
|
Daewoo |
DVT2082P |
Red missing |
Q552 2SA1266 on crt base |
|
Daewoo |
GB14F7T1 |
Dead - psu ok but no lop |
hairline crack by LOPTr coll tp LOPTx |
|
Daewoo |
GB14F7T1 |
Sound disappears int |
(IC) I501 a TDA8374A mounted on the VCR pcb. |
|
Daewoo |
GB14F7T1 |
Won't sw on with tape stuck - st/by only |
No volts at 6v reg IC1806 - P803 plug/skt has 8v in but no 8v o/p due to dry
joint on/off sw |
|
Daewoo |
GB14F8T1 |
No Vol adj - osg stuck ½ way |
IC1703 24C08P eeprom - pre-prog by Daewoo from SEME @ £18 |
|
Daewoo |
GB14H1N |
No tuning - supply & clk/data lines ok |
Tuner faulty - replaced Type DT5-BF18D pt no 48597-19930 |
|
Daewoo |
GB20F8T2 |
Dead or relay clicking only |
C840 47µ 25v in psu pri |
|
Daewoo |
GB20F8T2 |
No control of vol or chan change - neg pic with fb lines |
1703 eprom available from seme part number CAT24C08p at £8 |
|
Daewoo |
GB20F8T2 |
To set up & service mode
|
Put set in standby then press blue yellow green red & standby to get into
svc, to adjust use 4 & 7, vert centre 5 & 8 size 6 & 9 slope yellow, blue
horiz centre 123 & above to ajust RGB |
|
Daewoo |
GB2898CTV |
Arcing in scan coil plug blew components |
Field chip TDA8351, then bright blue raster - TDA6106Q B o/p chip on crt
base |
|
Daewoo |
GB2898ST |
Buzz on sound at low level |
resolder fop chip heatsink |
|
Daewoo |
GB2898ST |
No e/w correction |
Q404, next to the E/W o/p tr 2SC3198 leaky |
|
Daewoo |
GB2898ST |
no picture - sound, heaters, EHT were OK. |
Decoupling cap C417 4n7 400v leaky |
|
Daewoo |
GB2898ST |
Sound only - no line drive |
R820 feed to 12v & 8v feed should be 2R - was 10R in this case |
|
Daewoo |
GB2898ST |
St/by only |
C815 1000µ 25v o/c |
|
Daewoo |
N/K |
Rainbow raster - sound ok |
Field o/p chip faulty |
|
Daewoo |
T140 |
Dark pic - non existent until A1 turned up |
C542 10n 3kv on crt base int |
|
Daewoo |
T200 |
St/by only - relay clicks ok |
C410 1nf 2kv in lop stage smoking & faulty |
|
Daewoo |
T512 |
Poor greyscale tracking . |
C504 sc |
|
Daewoo |
TVC14VP |
Dead - led flashes red/green |
R817 o/c |
|
Daewoo |
CP330 |
Jumps chans and sound
varies |
24C08P Eprom memory chip
IV02 - use Daewoo type |
|
Daewoo |
CP330/CP365 |
Magenta cast after I501
replacement |
I501 TDA4661 chroma delay
line chip could be faulty |
|
Daewoo |
CP330/CP365 |
No pic or line drive |
Check drive pin 37 I701
TDA8362B, if none check 8.2v pin 36, if present replace chip, if absent
check R401/2, D401 |
|
Daewoo |
CP330/CP365 |
Txt absent/garbled |
XT01 27Mhz Xtal |
|
Daewoo |
CP365 |
Int loss of signals - OSD
ok |
Dry joints chopper tfmr |
|
Daewoo |
CP365 |
Int signals |
Dry joints sec of chopper
tfmr |
|
Daewoo |
CP380 |
Blank raster, no sound, osg
or r/c when first switched on (OK after re-switched on) |
Earth speakers/grill to crt
rimband |
|
Daewoo |
CP760 |
pic displaced to left |
crack in pin 10 loptx - no
fback pulse to line gen AFC loop |
|
Daewoo |
CP775 |
Dead - lop tr Q401 2SD1880
s/c |
C416 blue disc cap 680pf
2kv s/c. D503 1N4148 s/c; RC527 10R chip res; R503 10k; R409 4k7 were
cause of problem |
|
Daewoo |
CP775 |
Pic slow to come on - sound
ok |
Replace TDA8375A jungle
chip |
|
Daewoo |
CP775 |
Various faults on chan
change; eg E-W, blank raster, snow
or st/by |
data line down to 4V (must
be 5V) - D708 5.6V zener is leaky Also replace D709 5.6V zener to be on
the safe side. |
|
Daewoo |
DMQ1454P |
Storing of tuning or
analogue levels inop |
D912, D903
leaky & check tactile switches for leakage |
|
Daewoo |
DMQ2057 |
Bright smeary pic |
190v to RGB low - C426 3µ3
250v |
|
Daewoo |
DMQ2059 |
Int trip |
On/Off sw momentary
contacts perm connected |
|
Daewoo |
DMQ2072 |
No signals & no OSD |
R256 18R o/c in st/by reg
cct |
|
Daewoo |
GB14F7T1 |
Sound disappears int |
(IC) I501 a
TDA8374A mounted on the VCR pcb. |
|
Daewoo |
GB14F8T1 |
No Vol adj - osg stuck ½
way |
IC1703 24C08P eeprom - pre-prog
by Daewoo from SEME @ £18 |
|
Daewoo |
GB2898ST |
No e/w correction |
Q404, next to the E/W o/p
tr 2SC3198 leaky |
|
Daewoo |
N/K |
Rainbow raster - sound ok |
Field o/p chip faulty |
|
Daewoo |
T140 |
Dark pic - non existent
until A1 turned up |
C542 10n 3kv on crt base
int |
|
Daewoo |
T200 |
St/by only - relay clicks
ok |
C410 1nf 2kv in lop stage
smoking & faulty |
|
Daewoo |
T512 |
Poor greyscale tracking . |
C504 sc |
|
Daewoo |
TVC14VP |
Dead - led flashes
red/green |
R817 o/c |
|
Dansai |
CTV1406 |
Int dead & makes
screeching sound |
Dry joints T751 line dr
tfmr |
|
Dansai |
CTV1406 |
INT DEAD POWER SUPPLY PINGS |
LINE DRIVE TX DRY |
|
Dansai |
CTV1477 |
Dead - faint whistling from
PSU. |
C617 small blue disc type. |
|
Dansai |
CTV1477 |
Dead apart from whistling
from psu |
C617 blue disc cap pinhole
in it |
|
Dansai |
CTV1477 |
No Sound. |
Speaker O/C. |
|
Dansai |
TAI1051 |
St/by only |
Dry joint link between line
dr tfmr & LOPtr heatsink |
|
Datssura |
CDR9009 |
Rolling non-lin pic |
R548 hi res (varies with
model - 180k typical) |
|
De
Graff |
CD51JS2B |
Swirling horizontal lines |
C562 22µ 250v in psu |
