Repair tips database, Service Manual free download,schematics,datasheets,eeprom bins,pcb,repair info for test equipment and electronics

Repair tips

Make	Model	Problem	Solution	Date

Found: 12
Akai	SN71B6	Blank raster at sw on sound ok - pic slowly comes	CRT low emission - reactivated	14-09-04
Akai	SN71B6	No raster, sound ok - if A1 advanced strange rainbow effect	Replace TDA8172 IC NS10 low volts pin 2 & RK53 3R3	14-09-04

Akai	SN71B6 TV2851	No pic - sound/EHT present - Field blanked	RK53 3R fusible pin 3 LOPTx	14-09-04
Decca	D28WT92SN PT92	Narrow uncorrected pic after s/c LOPTr replaced	Dry joint CD21 which blew BU508AF & CD21 680nF o/c causing RV38 2R2 fusible to go o/c	14-09-04
Decca	D28WT92SN PT92	Rush of EHT at start up then set goes off to S/by	Bad joint on CD21, DD07 (BY228) was s/c, and RV38 (2.2 Ohm Fusible) o/c	14-09-04
Hitachi	C24W410SN	EHT crackling with HT too high	ZD950 O/C 10 volt special zener T536207 also replace C601 and C611 220mfd	14-09-04
Hitachi	C24W410SN	EHT surge at sw on then reverts to st/by	Dry joints on IC951 and IC952 (Voltage regulators)	14-09-04
Hitachi	C32W510SN A7	Cuts out int	Check earth links & reg heatsinks for dry joints	14-09-04
Hitachi	C32W510SN A7	Field faulty - jittery & lines below centre - tappable	Dry joints R602 & 3 connected to pin 5 IC601 (under glue & a plastic strut)	14-09-04
Hitachi	C32W510SN-311	Dead with st/by led pulsing	IC4000 TDA7263M Audio o/p chip s/c	14-09-04
Sony	G3F KVK29SN21	Reverts to st/by with no sound/pic	LOPTr Q2591 2SC4927 s/c due to dry joints T2502 line dr tx & R886 1.2e 3w o/c in psu	14-09-04
Sony	KVS29SN1 G1	Black screen - no vert scan	Dry joints on VC (v pin out) sub-board Q1801 / Q1802/ Q1803/ IC1803	14-09-04

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