NEC JC-4301P3A / APC-H4311
- 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
| 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 | |
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 joint switching regulator and interface board assembly and disconnect supply lead, degaussing coil lead and C and K leads 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
| RefDes | Qty | Capacitance | Voltage | Mount | Diameter/Size | Height | Lead Spacing | Temp | Type | Brand | Series |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 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
| 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.
Related Links
Full CRT description can be found here https://crtdatabase.com/crts/nec/nec-jc-1401p3a
Service manual can be found here https://ia803403.us.archive.org/28/items/nec-jc-1401-p-3-a/NEC%20JC-1401P3A.pdf