NEC JC-4301P3A / APC-H4311: Difference between revisions

Preliminary Information
Release Year	1985
Leak Risk	High
Batteries	None
Mounting Technology	Through hole
Capacitor Types	Aluminium Electrolytic, ceramic
Destructive Entry	No
Hardware Specifications
Display Interface	DE-9 female connector, with switch for TTL or analog input, switch for automatic or manual input setting and DIP switches for colour palette size
CRT Guides
	General Information · Repair Cautions

VisualWikitext

Revision as of 13:07, 26 November 2024

For more information, see this article's corresponding Wikipedia page: Monitor.

This device is in the WorkNeeded:OriginalParts category because it was flagged as missing information on the original parts. It may have replacement parts listed but those cannot be assumed to be identical to the originals. If you have a list of the original parts, please feel free to add them by copying the relevant table from EditorsToolbox:Tables

This device is in the WorkNeeded:ReplacementParts category because it was flagged as missing information on replacement parts. If it has the original parts listed you may be able to search for replacements using the parametric searches available from parts distributors. If you have or make a list of replacement parts, please feel free to add them by copying the relevant table from EditorsToolbox:Tables

https://en.wikipedia.org/wiki/Multisync_monitor

The JC-4101P3A is perhaps the first true multisync monitor. The APC-H4311 appears to be exactly the same monitor but with a model number to match the NEC APC IV PowerMate 1 desktop system unit it was paired with. The caps lists below created from the APC-H4311 (240V) version with a manufacturing date of June 1987

Known Issues

Symptom or Problem Encountered

Causes

Electrolytic capacitor failures due to normal aging.

Solutions

Replace electrolytic capacitors

Disassembly Notes

Unplug power and data cables
Turn rotating part of base through 180 degrees and slide off
Remove fixed part of base by removing two screws
Remove four corner screws holding rear of case to front of monitor
Gently slide the rear of the case backwards. May need spludger to initially loosen.
Four screws to remove rear access panel shielding
Three screws, one on each chassis side panel and one near flyback, to remove top chassis/shielding
Two screws, one on each chassis side panel, to remove rear chassis/shileding
Undo screws holding joint switching regulator and interface board assembly and disconnect leads before sliding assembly upwards

Original Parts

There are a number of different boards found in the monitor

Purpose	Designation	Notes
Switching Reg	PWE-107 (JC-1401P3A, 120V) PWE-142 (APC-H4311, 240V Australia?)	Different boards, appears to depend on supply country voltage.
Interface	PWE-110
Deflection	PWE-105
Control	PWE-125A
LED	PWE-125B
Video	PWE-122
CRT	PWE-123
Tube	370HYB22-TC126 (PN2)	May differ, depending on...?

PWE-110 Interface Board

Capacitor Specifications and Footprint Information

RefDes	Qty	Capacitance	Voltage	Mount	Diameter/Size	Height	Brand
C819	1	1 uF	50	Through hole	5	12	Rubycon
C820	1	2.2 uF	50
C812, C813, C829	3	10 uF	16				Nichicon
C806, C827	2	47 uF	16				Matsushita
C805	1	47 uF	16				Rubicon
C804	1	47 uF	16				Nichicon
C832	2	100 uF	10
C801	1	100 uF	16				Rubycon
C815	1	220 uF	10				Nichicon
C810	1	220 uF	16

PWE-142 Switching Regulator Board

Capacitor Specifications and Footprint Information
RefDes	Qty	Capacitance	Voltage	Temp	Brand
C664	1	1 uF	160	0 °C	Rubicon
C609, C615	2	4.7 uF	50		United/Chemicon
C621, C620	2	22 uF	50		United/Chemicon
C654	1	100 uF	35		United/Chemicon
C653	1	100 uF	100
C658, C662, C657	3	100 uF	160
C611, C617	2	220 uF	16
C651	1	330 uF	100
C610, C616	2	470 uF	16
C652	1	470 uF	35

Replacement Parts

Basic PCB Name

Capacitors
RefDes	Qty	Compatible Part Number	Order Links
			Digikey

If parts are not available or different selection is preferred, you can use the values in the Original Parts section to perform a parametric search.