NEC JC-4301P3A / APC-H4311

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

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

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.

Known Issues

Symptom or Problem Encountered

Causes

• Electrolytic capacitor failures due to normal aging.

Solutions

• Replace electrolytic capacitors

Disassembly Notes

1. Unplug power and data cables
2. Turn rotating part of base through 180 degrees and slide off
3. Remove fixed part of base by removing two screws
4. Remove four corner screws holding rear of case to front of monitor
5. Gently slide the rear of the case backwards. May need spludger to initially loosen.
6. Four screws to remove rear access panel
7. Three screws, one on each side panel and one near flyback, to remove top chassis/shielding
8. 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

Capacitor Specifications and Footprint Information

RefDes	Qty	Capacitance	Voltage	Mount	Diameter/Size	Height	Lead Spacing	Temp	Type	Brand	Series

PWE-142 Switching Regulator

Capacitor Specifications and Footprint Information

RefDes	Qty	Capacitance	Voltage	Mount	Diameter/Size	Height	Lead Spacing	Temp	Type	Brand	Series
		0 µF						0 °C

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.