Repair Tips

Honda civic / Acura transmission linkage roll pin (aka bitch pin - Honda part number 90751-S04-000 - PIN, SPRING (8X22) ) removal and installation:  Transmission linkage boot was torn on my 1999 Honda Civic Si (Honda part number 24316-PS1-000 - BOOT, SHIFT ROD).  Solution: Remove spring pin, remove old boot, install new boot, reinstall spring pin.  I made a press tool (drawings here) to press the pin out and back in.

Press tools and new boot.  The near bolt is for pressing the pin out and the far bolt is for pressing the pin back in:

Spring pin removal and installation tools as well as new boot ready for install

The old boot pushed forward to expose the retainer clip:
Old boot pushed forward exposing retainer clip

Retainer clip removed:
Retainer clip removed

Press tool in action:
Press tool in action

A close up view.  Note the pusher bolt has already pushed the spring pin partway through.
Press tool in action (close up)

Cranking on the press bolt (find out what the bracelet is about here):
Cranking on the press bolt

Pin has been extracted:
Pin extracted

The old boot:
The old boot

Preparing to press the pin back in:
Preparing to press the pin back in

Reinstalling the old pin.  Using crescent wrench to prevent the block from rotating while I crank on the press bolt:
Reinstalling the old pin

Spring pin (aka bitch pin) reinstalled:
Spring pin reinstalled

Retaining clip reinstalled:
Retaining clip reinstalled

New boot installed:
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LG P50G20 HDTV Plasma TV Symptoms: Totally dead, no signs of life.  Solution: On power supply board, replaced voltage regulator IC part number MR4020 (TO220F package), replaced fuse (5A 250V), replaced diode RGP15M (black plastic case), replaced ceramic disc capacitor 4700pf 1000V (blue epoxy case).


Samsung VCR model VR5802 Symptoms: Irregular flashing display, wouldn't take tape, wouldn't eject tape, head and rollers spin momentarily while display flashes. Solution: Replace capacitors C09 22uF 50V non-polar electrolytic and C04 4.7uF 200V polar electrolytic, both in power supply. They both tested high ESR.


Dell 21 inch monitor D1626HT (Sony Chassis N3 - similar to Sony Model GDM-500PS) Symptoms: Horizontal edges unstable (jittery) and pincushion problem. Solution: Replace capacitors C529 22uF 250V electrolytic and C750 10uF 50V electrolytic, both high ESR. Also replaced deflection control IC CXA2043Q 48pin QFP. Best price for this chip was MCM for $36.39 plus shipping. Sony DAS (digital alignment system) was not needed after replacement.

Here are some pictures of the replacement:

Two sides of the bad chip have been desoldered. Note some capacitors have been removed for working room.
Here's the board. You can see the caps I removed in the glass bowl (upper left) The bad chip is completely removed.
A close-up of the pads after solder-wicking them clean and alchohol cleanup of the flux.
The new chip has been installed.
A close-up view of the new chip.
Something reference for size.
The capacitors I removed have been reinstalled.
The board again, with the new chip this time.

IIyama Vision Master 17 inch monitor model MF-8617E FCC ID F97MF8617E. Symptoms: No high voltage (no static on screen). Degaus works when powered on, and some intermittent high frequency noise can be heard. Solution: Replace capacitors at locaton C5C9 10uF 50V electrolytic and location C5C7 4.7uF 450V electrolytic, both high ESR. Also replaced HOT, location Q5A2 C486 (aka NTE-175). The HOT was shorted across the Base-Emitter junction.


Optiquest V71 17 inch monitor model VCDTS21348-1M FCC ID 7862A005. Symptoms: Completely dead. No signs of life whatsoever. Solution: PCB trace was burned away around the positive pin of the rectifier. Removed rectifier, cleaned pin, resoldered with a jumper wire from pin to a good section of PCB trace.


Gateway 17 inch monitor model YE0711-01 Symptoms: Completely dead. No signs of life whatsoever. Solution: PCB trace was broken along one of the power plug pins. Scraped some of the solder mask away and bridged the broken path with solder. Here is what it looked like after cleaning up the flux with alcohol.


Gateway 17 inch monitor model YE0711-01 Symptoms: Flakey color when cable is wiggled. Solution: Replaced the cable.


Dell Ultrascan 21 inch monitor model P1110 Symptoms: Excessive brightness. Solution: Soldered a 10M high voltage resistor in parallel with one of the two existing 10M resistors leading to the G2 pin on the little board on the neck of the CRT. This effectively made the resistance 5M.


Dell 19 inch monitor model D1226H Symptoms: The left edge (about 20 percent of the screen) was darker than the rest. Solution: Replaced capacitor 2527. 160V 1uF. It was high ESR.


Dell Ultrascan 21 inch monitor model P1110 Symptoms: Excessive brightness. Solution: Soldered a 10M high voltage resistor in parallel with one of the two existing 10M resistors leading to the G2 pin on the little board on the neck of the CRT. This effectively made the resistance 5M. After this mod, it was noticed that the monitor took a long time to warm up...around 60 seconds before a picture would appear. C685 on the power supply board (10V 100uF) was high ESR and was replaced. Monitor warmup time was around 15 seconds thereafter.


NordicTrac Treadmill model ???? Symptoms: The tilt worked, but the belt didn't run. Solution: On the power supply board (the one with the big heatsink), replaced DZ1 1W C15PH 15V 5% zener diode with NTE145A 1W 15V zener. Also replaced DZ4 BZV47C24 2W 24V 5% zener diode with NTE5137A 5W 24V 5% zener. Update: although these parts were definitely bad, they were not the whole problem as the treadmill still doesn't work. In the process of checking the other components, I also learned something interesting. Q4 (W33N20), the big transistor on the heatsink is an enhancement-mode FET. The interesting part is that the small current from my DMM was enough to charge the gate and cause the source-drain path to act as a short...even quite a while after the test leads had been moved from the gate pin. Apparently the current requirements to charge the gate of a FET is somewhere in the nanoamps.


Dell Ultrascan 21 inch monitor model P1110 Symptoms: Very long warm-up time. (i.e. about two minutes) Excessive brightness. Solution: Replaced C684 on the power supply board (10V 100uF). It was high ESR. Scoping the heater pin on the neck of the CRT showed erratic voltage to the cathode heaters until about a minute or two into the warm-up. At this point the voltage slowly became more stable until it finally settled around 4.8V. After replacing C684, the voltage at the heater pin immediately went to 4.8V at power on. This P1100 also suffered from the excessive brightness problem. Soldered a two 10M high voltage resistor in series with each other and then bridged these across one of the two existing 10M resistors leading to the G2 pin on the little board on the neck of the CRT. This effectively made the resistance 7M.


Sears 60 amp, 12 volt / 10 amp, 6/12 volt / 2 amp, 12 volt Fully Automatic Starter/Charger Maintainer model 934.71614 Symptoms: The automatic charging functions didn't work. Solution Replaced the main power component S1055M with NTE-5539. The part is an SCR and was shorted across the K-G (cathode-gate) junction. A 110 ohm resistor leading to the gate pin of the SCR had gotten quite hot, discoloring itself and the circuit board. The resistor was fine however and was not replaced.


Dell 19 inch monitor model D1226H Symptoms: Completely dead except for the amber LED on the front. Solution: Replaced R3544 1 ohm, 1/8 watt fusible resistor. It was burned. Replaced the horizontal output transistor, component 7532 2SC5331 with NTE-2533. It was shorted across the base-emitter junction. Also replaced C2541 16 volt, 47uF electrolytic capacitor. It was high ESR.


Craftsman 17hp 42inch deck riding mower with Briggs and Stratton engine Model 311704, Type 0132-E1. Symptoms: Starter had difficulty turning the engine past the compression stroke. Solution: After checking all the electrical possibilities, the solution ended up being valve adjustment. The valve clearance needs to be .003/.005 on the intake valve and .004/.006 on the exhaust valve. After adjustment, the starter turned the engine over just fine.


KDS 20" Multi-scan color monitor FCC ID: EVOKD-2000 Model: VS-19. Symptoms: User complained the monitor would stop working after being on for a period of time. Solution: Resoldered many bad solder joints. Notable problems were the flyback pins, power rectifier, and various heatsinks. Probably about 50-100 pins resoldered total.

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Michael Cencula,
Oct 18, 2011, 4:26 PM
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Michael Cencula,
Oct 18, 2011, 4:26 PM
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Michael Cencula,
Oct 18, 2011, 4:25 PM
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Michael Cencula,
Oct 18, 2011, 4:20 PM
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Michael Cencula,
Oct 18, 2011, 4:21 PM
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Michael Cencula,
Oct 18, 2011, 4:21 PM
ą
ď
Michael Cencula,
Oct 18, 2011, 4:21 PM
ą
ď
Michael Cencula,
Oct 18, 2011, 4:21 PM
ą
ď
Michael Cencula,
Oct 18, 2011, 4:21 PM
ą
ď
Michael Cencula,
Oct 18, 2011, 4:21 PM
ą
ď
Michael Cencula,
Oct 18, 2011, 4:21 PM
ą
ď
Michael Cencula,
Oct 18, 2011, 4:21 PM
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Michael Cencula,
Oct 18, 2011, 4:26 PM
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