TV
Repair Database
|
Hitachi |
M |
Field lin
problem after replacing chip TDA 8350Q |
D718 BYD33 under heatsinks
split in 2 |
|
Hitachi |
M |
To exit factory pre-set
mode (Model no in red across screen) |
switch
on whilst depressing vol up/vol down buttons |
|
Hitachi |
NP6C |
Startup - int startup. |
Poor connections to module
CP901. |
|
Hitachi |
NP6C |
Startup - no startup. |
R733 o/c.C910 startup con. |
|
Hitachi |
NP6C |
Sync - Line frequency
varies. |
TR702. |
|
Hitachi |
NP80 |
FIELD COLLAPSE |
D601 ON PIN 9 IC701 S/C |
|
Hitachi |
NP81 |
Frame - bounce on ch change
or picture change |
C610 ( 220u f 50v ) |
|
Hitachi |
NP81 |
NO PICTURE ,
POWER SUPPLY SCREAMING , LINE
TEARING A |
C906 O.C. 220mfd ,
400v |
|
Hitachi |
NP81 |
POOR FIELD LIN |
C614 2u2 TANTALUM |
|
Hitachi |
NP81 |
TB700 P.SUPP TRANSISTORS
S.C. RB713 o/c |
REPLACE ALONG WITH C712
C726 94.7uF ) |
|
Hitachi |
NP81CQ |
Blanking fault. |
C715 ( 4.7u f 250v ) |
|
Hitachi |
NP81CQ |
Bright pic on lh side |
C715 4µ 250v - HT smoother
to rgb o/p stages |
|
Hitachi |
NP81CQ |
Bright white screen |
Check V at K2 on CRT base
if low replace C715 ( 4.7uF ) |
|
Hitachi |
NP81CQ |
Dark pic
1st Anode low 200V |
C714 ( 0.068uF ) 1KV
o/c |
|
Hitachi |
NP81CQ |
dead |
Mains fuse o/c; pin 6
chopper tfmr burnt, STK411, Q901 2SD787; R904 82K hi res, D901 2v7 zener
s/c, D902 33v zener o/c, lop tr s/c, TDA1035S sound chip u/s |
|
Hitachi |
NP81CQ |
Dead. |
R905 ( 56R
3w ) o/c , R906 ( 82R
2w ) o/c. |
|
Hitachi |
NP81CQ |
Field bounce esp on chan
change & hi contrast |
C601 220µ 50v u/s |
|
Hitachi |
NP81CQ |
Flyback lines on picture. |
C715 ( 4.7u f 250v ) |
|
Hitachi |
NP81CQ |
Frame - foldover at top. |
C610 ( 220u f ) |
|
Hitachi |
NP81CQ |
Frame - int frame
collapse/top cramping |
C608 ( 22u f ) |
|
Hitachi |
NP81CQ |
HIGH BRILL VERY INT |
ZD802 5.1v ZENER ON CRT BASE |
|
Hitachi |
NP81CQ |
Hum on picture - varies
with picture. |
Fit 22k in series with D402
if not fitted. |
|
Hitachi |
NP81CQ |
Int colour |
delay gate pulse coil L506
faulty |
|
Hitachi |
NP81CQ |
Int frame collapse. |
Drys R607. |
|
Hitachi |
NP81CQ |
No/Int loss of colour. |
L506 ( P No 2160831 ) |
|
Hitachi |
NP81CQ |
Small faint raster. |
C909 ( 220u f 160v ) |
|
Hitachi |
NP81CQ |
Spluttering |
dry joints loptx earth pin |
|
Hitachi |
NP81CQ |
Squeal from chopper Tx at
switch on. |
C909 ( 220u f 160v ) ,
Dry R702 , C912 , R905 , R906 |
|
Hitachi |
NP81CQ |
Startup - no startup. |
DJ on pin 4 of T901. |
|
Hitachi |
NP81CQ |
Sync - lack of frame &
line sync. |
R723 ( 22k ) o/c. |
|
Hitachi |
NP81CQ |
Thin white line travels up
screen |
dry joints M601 field o/p
device |
|
Hitachi |
NP81CQ |
Whistling - from power
supply. |
DJs on C912 , R905/6. |
|
Hitachi |
NP81CQ Mk2 |
Field lin - cramped at top |
C608 22µ 160v |
|
Hitachi |
NP81CQ Mk2 |
Flyback lines at top |
C715 4µ7 250v |
|
Hitachi |
NP82 |
Standby - stuck on standby
- no functions. |
IC901 ( STR441 ) on
main chassis. |
|
Hitachi |
NP82CQ |
dead |
Pri HT - no 11v HT - to
overide overvolts trip s/c C912 & sub lop tr with bulb. - HT now 130v
(correct on dummy load). Replace STR6020 and now ok |
|
Hitachi |
NP82CQ |
dead |
STR6020 s/c; 2Afuse o/c;
Lop tr 2SD898B Q781 s/c |
|
Hitachi |
NP82CQ |
Dead. |
Drys on D950. |
|
Hitachi |
NP82CQ |
FIELD FOLDOVER &
FLYBACK LINES |
R614 HIGH 150k |
|
Hitachi |
NP82CQ |
Frame - rolling when hot. |
C609 ( 0.22u f ) if
not check components off pin 1 of TDA |
|
Hitachi |
NP82CQ |
Int loss of sound. |
Looks like dry joints check
lead out wires on TX. |
|
Hitachi |
NP82CQ |
No chan store |
pin3 MDA2062 memory chip
only 4.7v (20v), break in pcb track under on/off sw |
|
Hitachi |
NP82CQ |
NO COLOUR PIN 5 IC501 LOW
( NORMALLY 3.8v FOR
MAX |
C507 2u2 SC |
|
Hitachi |
NP82CQ |
No picture. |
IC901 ( STR6020 ) ,
2SD898B , Q681 ( 2SC1213A )
, R772. |
|
Hitachi |
NP82CQ |
No sound or raster. |
R772 o/c , replace STA441C. |
|
Hitachi |
NP82CQ |
Ragged verticals & loud
whistle. |
IC701 ( LA7801 ) |
|
Hitachi |
NP82CQ |
Tuning - drift. |
D1503-8 , D1511-2 leaky. |
|
Hitachi |
NP82CQ |
Tuning - no tuning above a
certain frequency. |
D1508-1514 leaky. |
|
Hitachi |
NP82CQ |
Tuning - snowy picture
& poor sound. |
C054 ( 22uf ) in
AGC cct leaky. |
|
Hitachi |
NP82CQ |
Whistle - loud whistle
& ragged verticals. |
IC701 ( LA7801 ) |
|
Hitachi |
NP82CQ |
WONT TUNE |
CHECK ZD901
, IC901
( LM317T
) |
|
Hitachi |
NP82CQ |
WONT TUNE ,
LOW FIXED VOLTAGE AT TUNER TUNING PIN |
R1533 ( 39k ) |
|
Hitachi |
NP82CQ Mk2 |
int revert to st/by |
IC901 STR6020 |
|
Hitachi |
NP82CQ Mk2 |
off, trips for a few secs
at sw on |
When trip disabled squeal
from lopt - R772 10R hi res |
|
Hitachi |
NP82CQ/2 |
Dead. |
Q681 , IC901 , R772. |
|
Hitachi |
NP82CQ/2 |
No picture. |
IC901 ( STR6020 ) ,
2SD898B , Q681 ( 2SC1213A )
, R772. |
|
Hitachi |
NP82CQ/2 |
No sound or raster. |
R772 o/c , replace STA441C. |
|
Hitachi |
NP82CQ/2 |
Ragged verticals & loud
whistle. |
IC701 ( LA7801 ) |
|
Hitachi |
NP82CQ/2 |
Sparking inside set. |
R902/3 ( 82k , 0.5w ) ,
IC701 ( LA7801 ) , IC901 (
STR6020 |
|
Hitachi |
NP82CQ/2 |
Standby - going into
standby. |
IC901 ( STR6020 ) |
|
Hitachi |
NP82CQ/2 |
Tripping. |
IC701 , IC681 , Q681 ,
IC901. |
|
Hitachi |
NP82CQ/2 |
Whistle - loud whistle
& ragged verticals. |
IC701 ( LA7801 ) |
|
Hitachi |
NP82CQ2 |
Standby - int going into
standby. |
IC901 ( STR6020 ) |
|
Hitachi |
NP83 |
Channels - no channel
change & blank raster. |
Q1454 ( cita Pcb ) |
|
Hitachi |
NP83 |
FIELD COLLAPSE FIELD SQUARE
WAVE PRESENT AT PIN 4 |
C610 220uF 50v |
|
Hitachi |
NP83 |
No sound. |
R462 ( 22R
) o/c. |
|
Hitachi |
NP83 |
Standby - stuck in standby
mode. |
R1437 ( 820R )
o/c change to 1w type. |
|
Hitachi |
NP83CGMk2 |
Pic pulls to right &
int field roll |
Try s/c vid in & out
conns on txt pcb - if ok fault on txt pcb |
|
Hitachi |
NP83CQ |
Bright on LH side of raster |
C715 2µ2 250v o/c |
|
Hitachi |
NP83CQ |
Channels - no channel
change & no raster. |
Q1454 ( cita Pcb ) |
|
Hitachi |
NP83CQ |
dead |
2A fuse blackened, STR6020
s/c, Loptx s/c windings, 2 x 1R safety re o/c (no 12v or 30v) &
TDA3651 field chip u/s |
|
Hitachi |
NP83CQ |
dead |
won't work on dummy load
unless loptx removed - loptx faulty |
|
Hitachi |
NP83CQ |
dead |
STR6020 s/c; R715 2R2 o/c;
2A fuse o/c; R901 6R 6w o/c; TDA3651 u/s |
|
Hitachi |
NP83CQ |
Dead with "1" in
display |
No B+ volts until loptx
removed (130v) - new loptx cured it & HT normal at 110v |
|
Hitachi |
NP83CQ |
Field bounce - top inch of
pic int disappears |
C613 100n across field scan
coils |
|
Hitachi |
NP83CQ |
FIELD COLLAPSE OR FIELD
FLUTTER |
C603 1uF TANTALUM |
|
Hitachi |
NP83CQ |
Frame - foldover after 10
mins. |
C613 ( 100u f ) o/c. |
|
Hitachi |
NP83CQ |
Height reduces on warm up |
TDA3651A field chip u/s |
|
Hitachi |
NP83CQ |
Int/crackly sound |
tone control under front
flap noisy |
|
Hitachi |
NP83CQ |
No cold start |
C908 33µ |
|
Hitachi |
NP83CQ |
No
pic just vert lines |
same with txt pcb removed -
TDA3561A decoder chip u/s |
|
Hitachi |
NP83CQ |
NO PICTURE OR SOUND PSU
& Line ok |
12v RAIL LOW R716 OC OR
HIGH 2R |
|
Hitachi |
NP83CQ |
No raster - sound ok |
No lum from IC501,
sandcastle pulse low; R720/721 1M hi res |
|
Hitachi |
NP83CQ |
No raster - sound ok. |
R720 , R721
( 3.9k ) gone high. |
|
Hitachi |
NP83CQ |
No raster & no channel
change. |
Q1454 ( cita Pcb ) |
|
Hitachi |
NP83CQ |
NO S/V ,
IN AV MODE |
ZD1438 12v ZENER |
|
Hitachi |
NP83CQ |
Pic made up of large white
dots |
IC501 TDA3561A |
|
Hitachi |
NP83CQ |
Red raster & white hor
lines on txt |
TDA3561A u/s |
|
Hitachi |
NP83CQ |
Trips into st/by |
ok on dummy load - Loptx Pt
no 2433752 |
|
Hitachi |
NP83CQ |
Weak contrast, no col -
sound ok, controls have no effect |
IC501 TDA2561A |
|
Hitachi |
NP83CQ |
WORKS FOR 2mins THEN
CHANNEL DISPLAY GOES OUT ,
PI |
NO 5v PIN 20 MAB8422 5v REG
OR BRIDGE RECTIFIER ON CITAC PANEL |
|
Hitachi |
NP84 |
Stuck in standby. |
DRYS ON CHOPPER TX |
|
Hitachi |
NP84CQ |
Bright vertical line. |
Zener ZD702
( 10v , 500mW ) leaky. |
|
Hitachi |
NP84CQ |
Channels - screen flashes
red , green or blue. |
IC501 ( TDA3562A ) reduce
R726 to 560R R610 to 8.2k. |
|
Hitachi |
NP84CQ |
Dead |
R710 OR R713 OC IN LINE
DRIVER STAGE |
|
Hitachi |
NP84CQ |
Dead |
CHECK Q703 , Q702 , Q903
& LOPTY |
|
Hitachi |
NP84CQ |
dead |
F901 1.6A fuse o/c - no
other ff |
|
Hitachi |
NP84CQ |
Dead - blown. |
Uprate fuse from 1.25a to
1.6amp. |
|
Hitachi |
NP84CQ |
dead - ht fuse o/c |
when replaced squeals if sw
held in - whisker of wire on lopt pin s/c supply |
|
Hitachi |
NP84CQ |
Dead - shows "1"
in display |
Q902 BU806; ZD901BZW03C36;
Q1455 BC548B |
|
Hitachi |
NP84CQ |
dead - trips once at sw on |
HT high at 150v (100v); Q902 BU806 leaky; ZD901 BZW03C36 s/c |
|
Hitachi |
NP84CQ |
dead - whines only |
ok on dummy load - Loptx Pt
no 2434141 |
|
Hitachi |
NP84CQ |
Dead StBy LED & channel
indicators ok |
Check Q1455
( BC548 ) |
|
Hitachi |
NP84CQ |
Dead. |
R710 ( 2.7k )
, R713 ( 2.2k ) , |
|
Hitachi |
NP84CQ |
excess ht & rolling |
R908 22k
in error sensing network hi res |
|
Hitachi |
NP84CQ |
Field bounce/roll |
C603 47µ 160v u/s |
|
Hitachi |
NP84CQ |
field collapse |
C603 47µ 160v scan
coupling cap |
|
Hitachi |
NP84CQ |
Frame - memory not storing. |
IC201 ( ZTK33B ) |
|
Hitachi |
NP84CQ |
Int col |
TDA3565 dry joints |
|
Hitachi |
NP84CQ |
Int goes into st/by &
Ch+/Ch- buttons on tv won't operate correctly |
Reprog micro as per
instructions |
|
Hitachi |
NP84CQ |
Int st/by & chan change
no's |
No 12v to remote pcb etc.
R714 1R fusible in series with pin 2 loptx |
|
Hitachi |
NP84CQ |
No col |
Replace TDA3565 & adj
ref osc |
|
Hitachi |
NP84CQ |
No col |
Pin 11 IC501 low - C511 2µ2
50v brightness pot decoupler |
|
Hitachi |
NP84CQ |
No colour - int. |
C507 ( 2.2u f ) ,
IC TDA3562A. |
|
Hitachi |
NP84CQ |
No frame or sound. |
R714 ( 1R
) o/c. |
|
Hitachi |
NP84CQ |
No sigs - just snow |
No 12v to tuner - crack in
print by R222 AGC control |
|
Hitachi |
NP84CQ |
NO SOUND |
TDA4503 |
|
Hitachi |
NP84CQ |
Partial field collapse |
C603 47µ 150v in field o/p
cct |
|
Hitachi |
NP84CQ |
Stuck in standby. |
R908 22k HIGH |
|
Hitachi |
NP84CQ |
Stuck in standby. |
1.6a fuse on L/H side main
PCB. |
|
Hitachi |
NP84CQ |
The picture would roll. EHT
trip thyristor operati |
R908 in the regulator
circuit had risen in value from 22k .The fault could also occur with
Models CPT1444 and CPT1446. |
|
Hitachi |
NP84CQ |
Top of the picture blanked
out |
C905 o/c 100mfd 200v (next
to tuner) |
|
Hitachi |
NP84CQ/2 |
Channel display no other
functions |
Replace Q902 |
|
Hitachi |
NP84CQ/2 |
DEAD BUZZES
, ZD953 S/C |
C908 4u7 160v |
|
Hitachi |
NP84CQ/2 |
Dead. |
STR4211 IC901 power supply
IC s/c , also change2.7v zenor |
|
Hitachi |
NP84CQ/2 |
Distorted sound. |
R423 ( 56R )
high in value. |
|
Hitachi |
NP84CQ/2 |
Int blowinf fuse. |
TH901 posistor. |
|
Hitachi |
NP84CQ/2 |
line - tear - pulling &
drift. |
C214 ( 470uf ) of
pin 7 of IC201 |
|
Hitachi |
NP84CQ/2 |
NO PIC + SCREAMS |
LOPT + TRANSISTOR SC |
|
Hitachi |
NP85 |
Appears dead but voltages
on tube base |
D920 , D919 in psu dry
jointed or oc. |
|
Hitachi |
NP85 |
Teletext - coming over Tv
picture. |
IC2101 ( SAA1272 ) ,
SAA1251. |
|
Hitachi |
NP85CQ |
blank raster no sound |
TDA4505 no vid o/p chip
faulty TDA4505E will work |
|
Hitachi |
NP85CQ |
Dead - normal volts at crt
base |
Dry joints D920, 919 in psu |
|
Hitachi |
NP85CQ |
No sound |
TDA4505 -2Y chip faulty -
Mod kit reqd to use TDA4505E |
|
Hitachi |
NP86 |
BLANK RASTER + NO SOUND |
TDA4505 US-CHECK TYPE No- |
|
Hitachi |
NP86 |
INT LOSS OF PIC ,
GOES DARK |
XTG2 17.73Mhz CRYSTAL (
IN TEXT MODE PIN 9 IC13 SHOULD BE 4v ,
IN MIX IT SHOULD PULSE , TV
MODE ZERO. ) |
|
Hitachi |
NP87 |
SET INT WON'T COME ON +
BLOWS LINE OP TRANSISTOR E |
C917 IN POWER SUPPLY 4u7 |
|
Hitachi |
NP8CQ |
Int colour. |
One leg og R620 s/c to
jumper lead J723. |
|
Hitachi |
NP8CQ |
Int no colour. |
Try adj R515 ,
make sure agc control R203 is turned up. |
|
Hitachi |
NP8CQ |
OVER BRIGHT PIC
, NO FLYBACK LINES |
22mfd , 250v SMOOTHING CAP TO RGB OP. STAGES |
|
Hitachi |
NP8CQ |
Standby - in standby at
switch on. |
BC548 also 4 7uf/22uf
electrolytics. |
|
Hitachi |
NP8CQ |
Startup - no startup. |
Chopper transistor. |
|
Hitachi |
NP9A |
Dead - Int dead. |
DJs |
|
Hitachi |
NP9A |
Line - pulling on
verticals. |
CRT conductive earthing ,
C983 , C907 , IC980. |
|
Hitachi |
NP9A |
Standby - going into
standby at switch on. |
Check C919 if its a 22u f
change it to a 220u f. |
|
Hitachi |
NP9A |
Standby - going into
standby int. |
4.43Mhz crystal X1401. on
memory PCB PC895. |
|
Hitachi |
NP9A |
Standby - stuck in standby
mode. |
Change C919 to 220u F ,
replace C906/918 , drys on T901/703 |
|
Hitachi |
NP9A |
Tripping. |
Q905 ( 2SA673 ) o/c. |
|
Hitachi |
NP9A |
Width - reduced. |
R756 o/c. |
|
Hitachi |
PAL4 |
Frame - foldover after 10
mins. |
C613 ( 100u f ) o/c. |
|
HITACHI |
TN2166/2146 |
POWER SUPPLY TRIPS |
SUSPECT DRY JOINTS ON IC952 |
|
Hitachi |
TN2166/2146 |
POWER SUPPLY TRIPS |
SUSPECT DRY JOINTS ON IC952 |
| Hitachi/Fujian |
HFS1425 |
Store function inoperative-Does not hold memories. |
Pin2 of M58655 memory chip, must be at -30V. If not, check/
replace C920 1uF/250V cap. |
| Hitachi/Fujian |
HFS1425 |
Store function inoperative-Does not hold memories. |
Pin2 of M58655 memory chip, must be at -30V. If not, check/
replace C920 1uF/250V cap. |
