TV
Repair Database
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Matsui |
1091 |
Hum bar on pic - may start
aft time |
Change Bridge rect diodes
with BY255 even tho' measure ok |
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Matsui |
1091 |
off |
piece of wire between pins
2 & 4 of lopt that shouldn't be there! |
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Matsui |
1402 |
field trying to collapse
with flicker |
field preset int |
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Matsui |
1402 |
line lock int |
C484 2µ2 tant |
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Matsui |
1402 |
No tuning |
No AGC volts at tuner -
R261 47k o/c |
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Matsui |
1403 |
Dead |
R651 o/c, STK7348 faulty
& check C655 0µ47 50v for o/c |
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Matsui |
1403 |
Dead - relay clicks when sw on |
R652 390k o/c in psu |
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Matsui |
1403 |
Int blank pic |
tapping brings back pic -
serv sw int - wire it out |
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Matsui |
1407 |
Dist sound |
Q351 (2SC2120) and Q352
(BC640) |
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Matsui |
1407 |
No sound |
Q353
(2SC1815) |
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Matsui |
1407 |
No sound |
Replace Q351 & 352 aud
o/p trs & replace sm R358 with 180R |
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Matsui |
1407 |
sound
low muffled |
Q351 & 352 overheats.
Replaced spkr & trs |
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Matsui |
1410 |
Dead with Ch 1 led lit |
F501 2.5A o/c, 5R6 5W surge
lim res o/c, RH1 D508 s/c |
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Matsui |
1410 |
No colour |
IC601 AN5620X chip |
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Matsui |
1410 |
No line drive with buzzing
- HT ok |
Q401 line dr tr no volts on
coll (35v) - o/c driver tfmr - repaired |
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Matsui |
1420 |
Dead |
Chopper tr 2SC3156 s/c -
used BUX48A, 3R9 5w dropper o/c, D508 s/c used RGP15M. |
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Matsui |
1420 |
Dead |
2A fuse blackened; Chopper
tr s/c; 3R9 5w dropper o/c; dry joints chopper tfmr & replace C508 4µ7 |
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Matsui |
1420 |
Dead - low HT (60v) - ok on
bulb (120v) |
LOPTx s/c winding - HT
correct at 103v after replacement |
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Matsui |
1420 |
Field cramp |
C412 1µ 25v tant |
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Matsui |
1420 |
Green screen |
R807 8k2 on crt base hi res |
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Matsui |
1420 |
Sound low |
R145 4k7 in series with vol
contr hi res |
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Matsui |
1422 |
Blank raster |
L108 in if strip o/c |
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Matsui |
1422 |
Dead |
C617 & C612 4n4 1kv-
usually crack -also check surge limiter Res |
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Matsui |
1422 |
Dead |
C617 burnt & Q604 s/c |
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Matsui |
1422 |
Dead - HT high |
Q305 s/c & C609 47µ o/c |
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Matsui |
1422 |
Field - lack of height |
C308 2µ in field lin cct |
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Matsui |
1422 |
Field collapse |
56v supply missing from FOP
chip due to R306 10R fusible o/c |
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Matsui |
1422 |
No display or tuning |
D403 on front panel |
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Matsui |
1422 |
No signals |
Loss of LT supply as F602
was o/c - (encased in plastic with wires soldered to ends) |
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Matsui |
1422 |
No sound |
C150 s/c |
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Matsui |
1422 |
No sound |
C150 s/c at I/p to audio IC |
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Matsui |
1422 |
Whistling psu - but operates ok |
C613 4700pf split |
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Matsui |
1424 |
Dead |
R802/3 15k start up rwes hi
res |
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Matsui |
1424 |
Line freq wrong |
R109 30k hi res |
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Matsui |
1424 |
Sound lost on chan change |
HD401220 micro pt no
1983156 |
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Matsui |
1430 |
Bright on RH side, dark on
left of screen |
C429 47µ 160v & burnt
earth print near loptx |
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Matsui |
1430 |
Dead after spillage |
STR451 s/c - use STR50103
& mod kit, R2M diode s/c, 1A fuse o/c |
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Matsui |
1436 |
Dead - red led goes out
when sw from st/by |
Check R651 27R 3w, R653 1R5
3w, C655 0µ47 50v, STK7348 IC650. |
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Matsui |
1436 |
Dead - relay operates ok |
R652 390k o/c (no volts to
STK7348) |
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Matsui |
1436 |
field collapse |
VR702 height pot |
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Matsui |
1436 |
Field collapse |
No 25v supply to chip -
R603 2R2 2w fusible o/c, D602 s/c, C603 0µ01 400v s/c |
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Matsui |
1436 |
Line hold over sensitive -
won't lock correctly |
C490 0µ47 63v |
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Matsui |
1436 |
No col & streaking on
left |
C318 2µ2 50v faulty - pin
12 TA7698AP IC301 |
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Matsui |
1436 |
No line drive |
Driver tfmr T751 o/c |
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Matsui |
1436 |
No sound/pic - faint raster
after time |
R756 0R5 ½w in series with
lop tr base u/s |
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Matsui |
1436 |
Sound goes low with buzz |
dry joints C268 |
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Matsui |
1440 |
No sound |
R354 47k 1/2w o/c |
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Matsui |
1450 |
Chan stores on all chans
together |
32v tuning supply high at
38v, IC102 µPC574J faulty |
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Matsui |
1450 |
Dead |
R602 4R7 5w in psu o/c,
R622 180k o/c or R621 180k o/c |
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Matsui |
1450 |
St/by only |
5v supply to micro low as
C611 470µ 25v low cap - check C609/607 |
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Matsui |
1455 |
Blank raster except for chan no |
Q1103 no 12v at coll - crack in print between R121 &
Q1103 |
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Matsui |
1455 |
Blank raster with on screen
display, sound ok |
D417, Q407, Q408 both
2SC1815 |
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Matsui |
1455 |
Dark pic |
Q202 2SA502 |
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Matsui |
1455 |
Dead |
Check R603/4 or C613 & Q602 for leak - R624 100k o/c |
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Matsui |
1455 |
Dead with straining noise |
C613 4n7 1kv split open |
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Matsui |
1455 |
Field collapse |
Field o/p tr's Q302 &
303 |
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Matsui |
1455 |
Field collapse |
No 12v to TA7698AP chip -
R310 10R & D219 12v zener |
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Matsui |
1455 |
Field collapse |
Check R310 10R fusible,
R256 39R fusible, 12v zener D219 |
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Matsui |
1455 |
field collapse int |
R306 2R7 int o/c |
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Matsui |
1455 |
Flutter on pic - HT
instability |
Q605/6 st/by trs
overheating - Q605 2SA1013 leaky |
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Matsui |
1455 |
High HT blows lop tr |
C607 47µ |
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Matsui |
1455 |
Int reverts to st/by |
2SD1426 LOPTr was int |
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Matsui |
1455 |
Int sound/pic - comes & goes with a tap |
Loose screw LOPTr screen plate |
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Matsui |
1455 |
No line drive |
C311 decoupler leaky |
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Matsui |
1455 |
No
line sync |
R274 27k from LOPTx o/c |
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Matsui |
1455 |
No lum - has large pulse on
lum signal |
Q408 2SC1815Y & D417
1N4148 |
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Matsui |
1455 |
No luminance |
Q202 2SA562TM-Y, Q407/408
2SC1815Y or D417 1N4148 behind AV board |
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Matsui |
1455 |
No pic - pic blanked |
D417 1N4148 in Q408 coll
leaky |
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Matsui |
1455 |
No sound |
D219 12v zener |
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Matsui |
1455 |
No st/by |
Q905 2SD1680 series reg
leaky in 112v line - fitted BUT56A in lieu |
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Matsui |
1455 |
Overbright raster |
Q201 |
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Matsui |
1455 |
Patterning after a minutes
operation |
C604 100µ 400v mains
smoothing cap |
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Matsui |
1455 |
Pic pulses dark/bright |
High HT 220v (109v), C607
47µ 25v |
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Matsui |
1455 |
Rolling pic with line
tearing - worse when heated |
D103 1N60 to pin 5 (AGC) of
IC101 IF chip |
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Matsui |
1455 |
sound has whistle |
C429 2µ2 in micro cct
& C130 1µ in if |
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Matsui |
1455 |
St/by only |
C613 leaky |
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Matsui |
1455 |
St/by only |
C612 220µ - also check C607 47µ 25v |
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Matsui |
1455 |
Won't go into st/by |
Q606 2SC335 - used BU407 in
lieu |
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Matsui |
1455 |
Wont
stop in search tune |
Hairline crack in print
near Q404 |
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Matsui |
1455 |
Wrong cols |
VR503 10k, VR504 500R burnt
up on crt base, R510 1k5 & R511 4k7 o/c & C505 180pf s/c |
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Matsui |
1460 |
Dead - no line |
R323 1R8 o/c |
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Matsui |
1460 |
Dead - st/by & chan
no's only |
No HT pin 2 STR451, no
volts Pin 4 - R802 150k 1/2w o/c |
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Matsui |
1460 |
No chan store or Search
Down |
faulty switches - salvaged
replacements from scrap vcr |
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Matsui |
1465 |
Dead - chan no's only |
R802 150k o/c |
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Matsui |
1465 |
field collapse |
no 12v to pin 2 TA7698AP
IC501, D406 s/c, R435 2R 0/c, IC501 u/s, D242 1N4148 s/c |
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Matsui |
1465 |
No chan store |
M58655P memory chip IV02
u/s (Check presence of -31v first) |
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Matsui |
1465 |
No tuning |
L126 100mH o/c in 12v
supply to tuner |
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Matsui |
1465 |
off after fizzing |
loptx holed, C240 2µ2 50v,
R416 7k5 o/c, R328 10k |
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Matsui |
1466 |
Dead apart from
"2" in display |
R502, R503 330k o/c |
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Matsui |
1466 |
Low,
dist sound |
R353 10k in audio o/p stage
o/c |
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Matsui |
1476 |
Dead |
STR50103A s/c; R2M diode
s/c; 5R6 5w o/c; LOPTx also faulty |
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Matsui |
1476 |
Dead - no HT from STR50103A |
Q502 2SA952L b-e leaky -
used BC327 in lieu |
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Matsui |
1476 |
Field collapse |
D407 s/c; R437 2R7 o/c |
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Matsui |
1476 |
Slow start up then blank or partially blank |
R411 4k7 hi res |
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Matsui |
1480 |
Dark pic |
C509 470µ 16v |
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Matsui |
1480 |
Dead |
STR50103A o/c also can be
caused by R502/3 330k start up res o/c |
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Matsui |
1480 |
Dead |
STR50103 o/c - no other faulty components |
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Matsui |
1480 |
No signals |
T101 pri winding o/c |
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Matsui |
1480 |
No sound/raster - no line
drive |
Clean sticky glue around
line osc chip |
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Matsui |
1480 |
Partial field collapse |
µ1378H field o/p chip
faulty |
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Matsui |
1482 |
Attempts to start then
shuts down- cannot be run on dummy load |
Run set on 160vac - check
for cracks by LOPTx pin 1 to coll Q702 |
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Matsui |
1482 |
Bright, blank raster |
C630 100µ 25v 12v
reservoir cap o/c |
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Matsui |
1482 |
Dark pic |
Adj VR303 and check for dry
joints |
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Matsui |
1482 |
Int goes bright &
smeary |
ribbon cable to crt base
has shorting wire |
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Matsui |
1482 |
int goes to st/by |
st/by tfmr
Farnell 926-280 £4 |
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Matsui |
1482 |
No blue |
TDA3566 faulty-replaced
with TDA3566A |
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Matsui |
1482 |
Snowy pic |
Not tuner but SAWF |
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Matsui |
1482 |
St/by only |
R605 680k in psu o/c |
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Matsui |
1492 |
Blank raster |
C206 0µ47 |
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Matsui |
1492 |
Dark black & white pic
remains in st/by |
Q907 s/c |
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Matsui |
1492 |
Int sync |
Check for dry joints on txt
pcb - pins 4 & 8 conn CP851 |
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Matsui |
1492 |
No pic - blank raster |
C206 0µ47 |
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Matsui |
1492 |
Tuner drift - int |
Dry joints tuner |
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Matsui |
1494 |
Bright pulsating raster at
sw on then ok |
C609 47µ in psu |
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Matsui |
1494 |
field chip blowing |
100µ,
220µ, 10µ caps near chip replaced. |
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Matsui |
1494 |
wont go into st/by |
2SC2335 st/by tr |
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Matsui |
1496 |
Dead |
R101 5R6 5w o/c, Q101 FET
BUZ90 s/c, D112 BY299 s/c & check R109 330k ½w, R108 220k ¼w |
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Matsui |
1496 |
Dead |
Q101 FET 5N90 leaky, R101
4R7 o/c & check R109 330k, R108 220k, |
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Matsui |
1498 |
Blue raster with fb lines |
Blue o/p tr and 12k load
res faulty |
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Matsui |
1498 |
No pic - sound ok |
R430 180k 1w in LOP stage
o/c |
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Matsui |
1498 |
No pic - sound ok |
R430 180k 1w in LOP stage
o/c |
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Matsui |
1580 |
Dead |
C818 1µ 50v; R811; C810 22µ
160v; C806 1000µ 16v; C808 1000µ 25v;R409 2k7; C410 100µ 16v |
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Matsui |
1580 |
Dead - F851 fuse shattered |
Q801 BU508A s/c - caused by
R808 270k o/c |
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Matsui |
1580 |
No pic at sw on until A1's
adj |
Replaced TDA3562A &
change R513 from 180k to 68k & R515 from 120k to 150k |
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Matsui |
1580 |
Trips off with squeal -
high HT |
C818 1µ 50v - once
replaced HT normal at 112v |
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