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 23:51, 26 November 2024

For more information, see this article's corresponding Wikipedia page: https://en.wikipedia.org/wiki/Multisync_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

Full CRT description can be found here https://crtdatabase.com/crts/nec/nec-jc-1401p3a

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, 50Hz) 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 spudger 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/shielding.
Undo screws holding switching regulator and interface board assembly and disconnect supply lead, degaussing coil lead and C and K leads from the regulator board and four different control/data leads on the interface board before sliding assembly upwards.

Images

. .

Original Parts

There are a number of different boards found in the monitor

Purpose	Designation	Notes
Switching Reg	PWE-107 (JC-1401P3A, 120V, 60Hz) PWE-142 (APC-H4311, 240V, 50Hz, 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 board	PWE-123
Tube	370HYB22-TC126 (PN2), as found in APC-H4311 model	May differ?

PWE-110 Interface Board

Capacitor Specifications and Footprint Information

RefDes	Qty	Capacitance	Voltage	Mount	Diameter/Size	Height	Lead Spacing	Temp	Type	Brand	Series
C819	1	1 uF	50	TH	5	12	5	85C	Electrolytic	Rubycon	CE W ? M3441 ?
C820	1	2.2 uF	50	TH	5	12	5	85C	Electrolytic	Rubycon	CE W ? M856 ?
C812, C813, C829	3	10 uF	16	TH	5	11	5	85C	Electrolytic	Nichicon	A8716 ? SE (M) ?
C806, C827	2	47 uF	16	TH	6	12	5	85C	Electrolytic	Matsushita	S
C805, C804	2	47 uF	16	TH	6	12	5	-55-+105C	Electrolytic	Rubicon	PS-1 (?)
C832	2	100 uF	10	TH	6	11	5	(M)105C	Electrolytic	United/Chemicon	KM
C801	1	100 uF	16	TH	8	11	5	85C	Electrolytic	Rubycon	CE W ? M552
C815	1	220 uF	10	TH	8	12	5	85C	Electrolytic	Nichicon	SE(M) ?
C810	1	220 uF	16	TH	9	12	5	(M)85C	Electrolytic	United/Chemicon	71 ? Z(2) ?

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.

References

@@ Line 35: / Line 35: @@
 [[File:APC-H4311 Rear.jpg|alt=This image shows the rear view of the monitor, including power switch, TTL/Analog switch, DIP switches and DE-9 connector|thumb|APC-H4311 Rear view|left]]
 [[File:APC-H4311 Controls.jpg|alt=This image shows the controls located on the top of the monitor, including, brightness, contrast, horizontal and vertical hold adjustments.|thumb|APC-H4311 top panel controls|center]]
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 == Original Parts ==