Tips CPD200ES.doc

SYMPTOMS

Unit has no picture or color is missing. Video Connector has bent pins or signal conductor is open inside the video cable assembly. 

RESOLUTION

Replace video cable assembly. 

The connector pins can be damaged by incorrect insertion into computer connectors. The cable can be damaged by excessive bending, kinking, or twisting. Technical Dept. is investigating video cable failure causes. 

SYMPTOMS

Monitors came with no picture, but King noticed that it cycled power on and off and switched regulator transistor Q503 was getting hot. Horizontal output transistor Q507 had good drive, but output was distorted and shut off within a few seconds. No direct 

RESOLUTION

Units with SN above 4292109 have improved C534. 

SYMPTOMS

Click on/off. 

RESOLUTION

Replaced R659 only. 

R659 is the +150V divider in the B+ regulator circuit. Open R659 causes main PS regulator to cycle up and down. High R659 failures are under investigation by design groups. 

SYMPTOMS

Lower part of CRT face is separated from Bezel. Maybe due to shipping. Double sided tape between CRT face & bezel is separated. 

RESOLUTION

From P. Sanchez and P. Nguyen. Bend CRT (4) corner mounting brackets to correct angle. Reassemble using replacement double sided tape. 

TD investigating long term solutions from CRT and design engineers. SB C/P 210 provides additional correction procedures. 

SYMPTOMS

No power. No high voltage. 

RESOLUTION

Replace IC901. Old PN is 875939980. New PN is 874901436 

Refer to SB C/P No. 178 for information on improved CPU PN. 

SYMPTOMS

Unit has shutdown problem, after a black bar appears on screen. Mostly happens when unit is warmed up or AC input reduced below 90VAC. 

RESOLUTION

Discharge D620 and replace D603/Q602. Unit works OK with AC Input reduced to 60VAC with isolation transformer. This correction was tried on 10 units with this problem. 

Failure of limit Diode D603 causes Q602 PS Output damage. 

SYMPTOMS

Top degaussing coil which is secured by double sided tape fell off. On screen display is jumping from center to side on color screen. Found S1802/1803 rocky and shorted out. 

RESOLUTION

Replaced S1802 and 1803. Tied top degaussing coil in place by tie wrap, unit works fine. Second unit with same problem. 

Some units have tape contaminated by oil from the CRT shield. Preventative procedures now used in production. Check any Degauss coil damage before remounting it. 

SYMPTOMS

No power. Power light is flashing as in Aging mode. Pin 17 of IC904 has H. Sync but pin 21 of IC904 has no H. Output. Problem is the same on CPD100ES. 

RESOLUTION

Replace IC901. 

An improved IC901 is available per service bulletin C/P No. 178. Use PN 8-749-014-36 for replacements. 

SYMPTOMS

Unit has HV and goes into power saving mode. 

RESOLUTION

Found the plug at CN309 was loose. Reconnect the plug. Unit works fine. Unit is 3rd unit with same problem. 

CN309 sends timing signals between A and D Boards. Check cable routing to reduce tension on connector. Technical Dept. is investigating production improvements. 

SYMPTOMS

Picture reduced in H Size. After time, Horiz band of picture was blanked out. B+ voltage level was down from 150V. R609 in Q602 Source Gnd return was 0.4 Ohm (should be .22 Ohm). Resistance value increased more with time (about 10 Sec.). 

RESOLUTION

Replace R609. 

Faulty R609 current sensor in Q602 PS converter driver was causing incorrect current limt protection. Failed component is being checked by Technical Dept. 

SYMPTOMS

is very intermittent. If unit is put on a variable AC supply and the AC is turned down to about 90 volts the same symptoms appear. On a good unit the AC can be turned down to 60 volts before similar symptoms appear. Vien is changing D603 and Q602  which restore the AC voltage limit to 60 volts (same as on a good unit) 

RESOLUTION

We continue to investigate this issue

SYMPTOMS

Black and red wire comes from flyback will be plugged in J001 on a board. If we plug like it was marked on J001 unit will get dynamic focus problem. 

RESOLUTION

Reverse black and red connection unit works fine. 

Dynamic focus leads may be reversed in the FBT. Unit may have been tampered with. 

SYMPTOMS

Unit comes On for 1-2 Sec. with Power Button pressed. Shutsdown shortly there after. C610 is faulty. 

RESOLUTION

Replace C610. 

C610 sets swiching output timing for IC601 power supply regulator. Faulty C610 causes wrong PS switching frequency resulting unregulated output and shutdown. Other PS components may be damaged. PQD investigating faulty part sources with Capetronics  manufacturing. 

SYMPTOMS

The black bar at middle of screen (FPR T609) & FPR T0573) prev. w/o W34G0711. Replaced Q602 & D603, the unit worked fine and confirmed on 7/27/98. On 9/22/98 unit came back with same problem, assigned to w/o W34g3419. Again replaced Q602 & D603,  problem is solved. How can I prevent this problem? 

RESOLUTION

SB C/P 223 has procedures to check this PS circuit. Check C620 and T601 when Q602 is replaced. 

SYMPTOMS

Unit is dead. Shutdown condition is caused by Horiz. scan failure. Q507, Horizontal output transistor is shorted or has related failure. 

RESOLUTION

Replace Q507. 

Q507 is damaged by excessive voltage and current stress at elevated temperatures. Technical Dept. is investigating Q507 failures. 

SYMPTOMS

Unit came with amber LED flashing. Was in 1 year ago with same problem. Replaced IC901 with 875953691. Unit was turned on and did MPU download. Button functions Contrast +/ - & Brightness +/- did not work correctly. Called Izzy and he found out  that in older units you have to use part 875939980 for buttons to work correctly. Is there a way to tell by serial number which models need which IC ? 

RESOLUTION

PN 875939980 was replaced in 11/97 by PN 874901436 now Subbed to 875953691. Use SB C/P No. 173 procedures to correct front panel push button operations. 

SYMPTOMS

Issue Mapped FPR. See Comments for issue details. 

RESOLUTION

The SB C/P 223 has been revised to include specific corrections derived from design engineer investigations. JRG 

SYMPTOMS

Servicer at North Starlit TV in MI ordered IC603 and received a 6 pin opto coupler. The IC in the set had a four pin device. Looked at board and there are locations for both 4 and 6 pin devices. Cannot find any documentation for the 2 devices.  Servicer needs the part No. for the 4 pin device or a procedure to modify the unit to the 6 pin version. 

RESOLUTION

Replace 4 Pin part with 6 Pin part as follows. 1. Remove old IC603 marked Reserved. 2. Remove the (2) jumpers installed in Pin holes for 6 Pin location marked IC603 3. Solder new part into 6 Pin location marked IC603. ...