Hitachi ------------------------------------------------------------------ SKÄRMAR ------------------------------------------------------------------ Model No.: CM1587M Fault: On/Off led on but no picture. Remedy: Replace Q802 (2SC3886A) & R422 (0.15 Ohm 1/2 watt) check T801 for dry joints ------------------------------------------------------------------ Model No.: CPT2176 Fault: no sound or vision - set 'ticking' Remedy: replace line output transformer ------------------------------------------------------------------ VIDEO KAMEROR ------------------------------------------------------------------ Model No.: VM-3000A Fault: Intermittent loading then unloading of tape in both play and standby record modes. Most prevalent when first powered on. Other modes OK. Seems to be very common problem - I have seen 2 of 2 w/ this problem! Remedy: Resolder PG613 (ribbon from headwheel to main board). ------------------------------------------------------------------ TV ------------------------------------------------------------------ Model No.: 27cx1b chassis m3lxu Fault: no power on , shut down Remedy: f601 open, change. change ic of vertical an5521 bad. check c932 c724 c705 c 729 resolder cold joint to flyback and alc ------------------------------------------------------------------ Model No.: ts2210 Fault: raster to dark Remedy: c720 2200uf 16v ------------------------------------------------------------------ Model No.: 27CX5B and such Chassis Fault: Shuts down. Have to unplug and plug back in to get it on again. Continues to have this problem. Remedy: Add a capacitor (.47mfd @ 50v) across R302 with positive side going to the Flyback Transformer. ------------------------------------------------------------------ Model No.: 27cx1b chassis m3lxu Fault: power,shut down Remedy: f601 open and ic vertical falt an5521, check to c932 c724 c705 c729 resold flyback and horisntal ext ------------------------------------------------------------------ Model No.: 46UX10BF (Projection & Others) Fault: Probloms with PIP, Vert rolls, brightness & other. Remedy: There is a repair kit available from Hitachi to repair the PIP board. Part# X480125 ------------------------------------------------------------------ Model No.: 27CX6B Fault: Bright screen-scan lines-shuts down Remedy: check C705 (4.7MFD 250VDC) for short or high ESR also found R730 2.2 ohm open ------------------------------------------------------------------ Model No.: C2114T (G7PS chasis) Fault: coninual failling of field output chip ic601 Remedy: add two zenet diodes in series BZX79 33 volt cathode to pin 2 of ic 601 annode to chasis ------------------------------------------------------------------ Model No.: 46ux20b Fault: pin bow with low brightness Remedy: broken trace on collector of qk10 on sweep module,5v supply transistor for auto convergence board ------------------------------------------------------------------ Model No.: CT1912 Fault: Plays a while then,turns itself off. Remedy: Replaced C725(100uF/160v.)Located at left,rear of flyback and is connected to B+regulator ------------------------------------------------------------------ Model No.: Chassis AP53 Fault: Very Intermittent Vert and Hort Roll Remedy: Check for small ring cracks around the pins that support pcbs at front of main pcb (pin 15) ------------------------------------------------------------------ Model No.: CT5061 Fault: No green in picture -- out of focus Remedy: This is a CTC 132 chassis built by RCA in the USA the focus/screen pack cracks from over heating and will need replacing problem is that the part is supposedly unavailable NEWSFLASH the Hitachi 60sx10 has a new style resistor pack which does work ...use carefully think Part no. is ax00004 ?? not quite sure!! ------------------------------------------------------------------ Model No.: CT1912A Fault: Picture missing vertically from top to mid screen and from bottom quarter to bottom. No foldover. Linearity OK. Remedy: Check Q601 and Q602 (vert. drive and out) with freeze and transistor tester for leakage. If spayed while in set and picture changes, it/these are problem. Also, with my repair it returned a month later with same problem. Changed same defective Q again but this time added piece of sheet aluminum to heat sink of this Q so that it runs cooler. No return. ------------------------------------------------------------------ Model No.: NP4SX-l2 Fault: NO video Chroma causes apparently negative VIDEO. Remedy: Check for open L306 in emitter of TR305 ------------------------------------------------------------------ Model No.: CT7872B (Sams 2952) Fault: 1)No pwr.2)Turns on but not off.3)No snd. Remedy: 1)Replaced D971(leaky)on pwr.board and replaced Q0901 on main board. 2)Replaced D402(leaky)on main board. 3)Replaced IC0401,stereo decoder chip,on main board. ------------------------------------------------------------------ VIDEO ------------------------------------------------------------------ Model No.: Any with self cleaning arm Fault: Records fine but poor picture on play back Remedy: Clean sensors in head and either replace cleaning arm or remove it ------------------------------------------------------------------ Model No.: VT-330A(W) Fault: Keeps ejecting/loading tape until auto stop. Remedy: Cassette housing has jumped gears. ------------------------------------------------------------------ Model No.: VT11 Fault: DARK DISPLAY Remedy: Q114 FAULTY-TIMER PCB ------------------------------------------------------------------ Model No.: VT-F150E Fault: bad or no picture from tuner, cassettes play OK Remedy: check the 470uF caps in the powersupply, also change the electrolytic caps in the MF(located behind the tuner) ------------------------------------------------------------------ Model No.: VT585E Fault: Only Stand By! Display is OK. Remedy: Check C811 (4,7uF/16V)! This Cap is used for the 5V Supply ------------------------------------------------------------------ Model No.: VT-F462A Fault: No audio only when using tuner. Remedy: Replace little mts module PT# 1381181. Another module that works is the RCA #201532 or Sony #SBX1637-11 ------------------------------------------------------------------ Model No.: VTF365E Fault: No Function Remedy: If the voltage on pin 5 of the IC851 in the PSU moves between 10V and 15V without switching it's defective. ------------------------------------------------------------------ Model No.: VT-FX631A Fault: EATS TAPES / SHUTS DOWN Remedy: REPLACE OR RECONDITION MODE SELECTOR SWITCH BETWEEN CHASSIE & P.C.B ------------------------------------------------------------------ Model No.: vt-fx600 Fault: No picture on mode play (black screen) Remedy: Change IC 301 ; La 71000m ------------------------------------------------------------------ Model No.: VT-M630 Fault: Intermittent tracking Remedy: Replace C610,631,632,635 ------------------------------------------------------------------ Model No.: VT-M250A Fault: Tracking seems to hunt continuously on its own especially in EP mode, and unit makes loud humming sound in FF/REW. Remedy: Remove capstan & grease/oil ball bearing and brass bushing and bottom portion of capstan shaft. ------------------------------------------------------------------ Model No.: VTS895E Fault: Bad Playback picture Remedy: Check ALL Caps on the Y and Y/Chroma Boards! They like to leak. Don't forget to clean the boards before building in the new ones. ------------------------------------------------------------------ Model No.: VTM768 or VTF865 Fault: No Funktion Remedy: Replace C6 (1uF/250V) in the PSU ------------------------------------------------------------------ Model No.: VTS895E Fault: No EE and PB Picture on the black Scart Socket! Remedy: If you can see a picture on the blue (Decoder) Scart scoket check the Fuse QF2301 (ICP-N10 (0,4A). This fuse is on the board standing up on the right. ------------------------------------------------------------------ Model No.: VTS895E Fault: EE Picture is tearing Remedy: IC2502 (little Board, VPS Decoder) maybe defective. Try desoldering Pin 5. If it works now I am right! ------------------------------------------------------------------ HI-FI ------------------------------------------------------------------ Model No.: HTA-3F Fault: No audio at output Remedy: Replace dual output amplifier ------------------------------------------------------------------