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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: 37
Hitachi
C
1422
R
PSU off with a bang
D801 bridge rect DB107G s/c, chopper Q801 IRFI630G s/c, D805 BZT03C130 130volt 1.3watt zener s/c, R814 0R39 1/2w o/c. R813 0R22 1/2w o/c, Q404 BUT11AX LOPTr s/c, or fit T9813136. CHS code -12022TM (expensive)
14-09-04
Matsui
1422
Blank raster
L108 in if strip o/c
14-09-04
Matsui
1422
BLANK RASTER
L108 IN IF. STAGE o.c.
14-09-04
Matsui
1422
BLANK RASTER
R309
14-09-04
Matsui
1422
CRACKLING AUDIO
IC101 ( KA2914A ) ( EQUIV TO TA7680AP )
14-09-04
Matsui
1422
DARK PIC
C507 SC
14-09-04
Matsui
1422
Dead
C617 & C612 4n4 1kv- usually crack -also check surge limiter Res
14-09-04
Matsui
1422
Dead
C617 burnt & Q604 s/c
14-09-04
Matsui
1422
Dead
CHECK LINE OUTPUT TRAN Q305 , C609
14-09-04
Matsui
1422
Dead
C617 SC Q604 SC
14-09-04
Matsui
1422
Dead - HT high
Q305 s/c & C609 47µ o/c
14-09-04
Matsui
1422
DEAD OR BUZZING
C617 4n7 1kv C612
14-09-04
Matsui
1422
Field - lack of height
C308 2µ in field lin cct
14-09-04
Matsui
1422
Field collapse
56v supply missing from FOP chip due to R306 10R fusible o/c
14-09-04
Matsui
1422
Field collapse
Field output 56V supply missing because fusible resistor R306 ( IOR ) was open-circuit.
14-09-04
Matsui
1422
FIELD COLLAPSE
C249 0.22uF OPEN
14-09-04
Matsui
1422
LACK OF HEIGHT ABOUT AN INCH OF SCAN
C308 ( 2.2uF )
14-09-04
Matsui
1422
LOW FIELD ( ONLY 1" )
C308 2u2
14-09-04
Matsui
1422
No display or tuning
D403 on front panel
14-09-04
Matsui
1422
NO DISPLAY OR TUNING
F605 ( MAIN PCB ) OPEN
14-09-04
Matsui
1422
NO PICTURE JUST BLANK RASTER
L108 IN IF STRIP OPEN
14-09-04
Matsui
1422
NO POWER
C617 BURNT OUT CHECK Q604 AS WELL
14-09-04
Matsui
1422
No signals
Loss of LT supply as F602 was o/c - (encased in plastic with wires soldered to ends)
14-09-04
Matsui
1422
No sound
C150 s/c
14-09-04
Matsui
1422
No sound
C150 s/c at I/p to audio IC
14-09-04
Matsui
1422
NO SOUND
C150 SHORT
14-09-04
Matsui
1422
NO SOUND
C150 OC
14-09-04
Matsui
1422
NO SOUND OR QUIET SOUND
C139 OPEN
14-09-04
Matsui
1422
NO SOUND WHEN WARM
D102 OPEN
14-09-04
Matsui
1422
NO START UP OR TRIPPING
D607 LEAKY
14-09-04
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