Schematics 4 Free
Service manuals, schematics, documentation, programs, electronics, hobby ....
◦
register
◦
send pass
S
earch
B
rowse
U
pload
W
anted
D
atasheets
C
hassis2model
R
epair tips
F
ulltext search
C
ables & Connectors
R
epair tips
Electronic appliance repair tips database - TV (LCD,TFT,Plasma,Digital), Monitor, VCR, DVD recorder and player, Digital camera, Audio equipment, Microwave ovens, Phone systems, Computer repair
Make
Model
Problem
Solution
Date
Found: 901
Hitachi
NP84CQ
Channels - screen flashes red , green or blue.
IC501 ( TDA3562A ) reduce R726 to 560R R610 to 8.2k.
14-09-04
Hitachi
NP84CQ
Dead
R710 OR R713 OC IN LINE DRIVER STAGE
14-09-04
Hitachi
NP84CQ
Dead
CHECK Q703 , Q702 , Q903 & LOPTY
14-09-04
Hitachi
NP84CQ
dead
F901 1.6A fuse o/c - no other ff
14-09-04
Hitachi
NP84CQ
Dead - blown.
Uprate fuse from 1.25a to 1.6amp.
14-09-04
Hitachi
NP84CQ
dead - ht fuse o/c
when replaced squeals if sw held in - whisker of wire on lopt pin s/c supply
14-09-04
Hitachi
NP84CQ
Dead - shows "1" in display
Q902 BU806; ZD901BZW03C36; Q1455 BC548B
14-09-04
Hitachi
NP84CQ
dead - trips once at sw on
HT high at 150v (100v); Q902 BU806 leaky; ZD901 BZW03C36 s/c
14-09-04
Hitachi
NP84CQ
dead - whines only
ok on dummy load - Loptx Pt no 2434141
14-09-04
Hitachi
NP84CQ
Dead StBy LED & channel indicators ok
Check Q1455 ( BC548 )
14-09-04
Hitachi
NP84CQ
Dead.
R710 ( 2.7k ) , R713 ( 2.2k ) ,
14-09-04
Hitachi
NP84CQ
excess ht & rolling
R908 22k in error sensing network hi res
14-09-04
Hitachi
NP84CQ
Field bounce/roll
C603 47µ 160v u/s
14-09-04
Hitachi
NP84CQ
field collapse
C603 47µ 160v scan coupling cap
14-09-04
Hitachi
NP84CQ
Frame - memory not storing.
IC201 ( ZTK33B )
14-09-04
Hitachi
NP84CQ
Int col
TDA3565 dry joints
14-09-04
Hitachi
NP84CQ
Int goes into st/by & Ch+/Ch- buttons on tv won't operate correctly
Reprog micro as per instructions
14-09-04
Hitachi
NP84CQ
Int st/by & chan change no's
No 12v to remote pcb etc. R714 1R fusible in series with pin 2 loptx
14-09-04
Hitachi
NP84CQ
No col
Replace TDA3565 & adj ref osc
14-09-04
Hitachi
NP84CQ
No col
Pin 11 IC501 low - C511 2µ2 50v brightness pot decoupler
14-09-04
Hitachi
NP84CQ
No colour - int.
C507 ( 2.2u f ) , IC TDA3562A.
14-09-04
Hitachi
NP84CQ
No frame or sound.
R714 ( 1R ) o/c.
14-09-04
Hitachi
NP84CQ
No sigs - just snow
No 12v to tuner - crack in print by R222 AGC control
14-09-04
Hitachi
NP84CQ
NO SOUND
TDA4503
14-09-04
Hitachi
NP84CQ
Partial field collapse
C603 47µ 150v in field o/p cct
14-09-04
Hitachi
NP84CQ
Stuck in standby.
R908 22k HIGH
14-09-04
Hitachi
NP84CQ
Stuck in standby.
1.6a fuse on L/H side main PCB.
14-09-04
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.
14-09-04
Hitachi
NP84CQ
Top of the picture blanked out
C905 o/c 100mfd 200v (next to tuner)
14-09-04
Hitachi
NP84CQ/2
Channel display no other functions
Replace Q902
14-09-04
page:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
FB
-
Links
-
Info / Contacts
-
Forum
-
Last SM download : NEO TV-1563
script execution: 0.15 s