Hitachi Repair Tips
Search: hitachi
Results: 1065
Results: 1065
| Make | Model | Symptom | Problem | Solution | By |
|---|---|---|---|---|---|
| HITACHI |
A7 SERIES
|
Int reverts to st/by - due to high ht of 175v (135v) | Check for dry joints (often invisible) on set ht pot vr950 | ||
| HITACHI |
A7 SERIES
|
Field collapse or cramp | Check ic601 & if r616 68k is fitted, if not connect across zd603 - helps prevent crt flashover damage | ||
| HITACHI |
A7 C24W1TN
|
Trips | Does it trip with a1 volts at min/max? if not, check nicam chip is fully home in its holder | ||
| HITACHI |
A7
|
Dead - overvolts zener pgk180 s/c | Check dry joints ht pot rv950, r950 68k, r952 8k2 & opto ic901 pt no t548013 -see write up from dave hewitt | ||
| HITACHI |
A5 C2976TN
|
Sparks around crt base then reverts to st/by | Lop stage tuning cap o/c & clean up print on crt base | ||
| HITACHI |
A5
|
To get out of factory pre-set mode (model & proc type displayed on screen) | Hold "vol+" & "v0l-" buttons in whilst switching on | ||
| HITACHI |
A5
|
To exit factory mode (model displayed on screen) | Switch to st/by whilst service mode is displayed | ||
| HITACHI |
A5
|
To enter service mode | Enter factory mode by holding "vol+" & "vol-" whilst sw on, then press "tuning" button under flap on r/c | ||
| HITACHI |
A5
|
Field fault | Tadadkh0q & d718 byd33 | ||
| HITACHI |
A5
|
E/w faulty | Replace ic601 tda8350q | ||
| HITACHI |
A4
|
Dead - tripping with relay clicking in time | Connect dummy load to removed r751 3r3 7w connection & ht ok at 150v with sound. ic601 field/e/w chip proved faulty & d701/d701a | ||
| HITACHI |
A SERIES
|
To check psu - remove q904 & sw on | If no volts replace r901 82k, r909 6k8 | ||
| HITACHI |
A SERIES
|
St/by only | Check r952 47k or 68k, check dry joints ic950, 951 & 952 | ||
| HITACHI |
46TN SERIES
|
Int dead | Dry joint r719 in prot network (half hidden by strut) | ||
| HITACHI |
46TN SERIES
|
Ht settings | Ht=110v in 21" sets; 146v in 25/28" sets (note zd950 not 10v zener) | ||
| HITACHI |
162E
|
Frame cramping at top. | R613 high. | ||
| HITACHI |
C2842N 11AK19PP
11AK19 |
Dead - d823 blown (not shown on cct) | When replaced still faulty, ic802 mc44604p chopper chip u/s - also check fet chopper tr | ||
| HITACHI |
C2125T 11AK19Y4
11AK19 |
St/by only | Handset was faulty even though it gave an o/p | ||
| HITACHI |
C2125T 11AK19K
11AK19 |
Dead aft it went pop | D812 byd33d s/c in 14v supply | ||
| HITACHI |
C2842N 11AK19PP
11AK19 |
Dead - d823 blown (not shown on cct) | When replaced still faulty, ic802 mc44604p chopper chip u/s - also check fet chopper tr |