NEC JC-1401P3A / APC-H4311
- For more information, see this article's corresponding Wikipedia page: https://en.wikipedia.org/wiki/Multisync_monitor.
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 |
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 | 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 | Chemicon | 71 ?
Z(2) ? |
| C826, C828 | 0 | Empty location |
PWE-142 Switching Regulator Board
| RefDes | Qty | Capacitance | Voltage | Mount | Diameter/Size | Height | Lead Spacing | Temp | Type | Brand | Series |
|---|---|---|---|---|---|---|---|---|---|---|---|
| C664 | 1 | 1 uF | 160 | TH | 0 °C | Electrolytic | Rubicon | SH | |||
| C609, C615 | 2 | 4.7 uF | 50 | TH | Electrolytic | Chemicon | |||||
| C621, C620 | 2 | 22 uF | 50 | TH | Electrolytic | Chemicon | |||||
| C654 | 1 | 100 uF | 35 | TH | (M) 105C | Electrolytic | Chemicon | ||||
| C653 | 1 | 100 uF | 100 | TH | (M) 105C | Electrolytic | Chemicon | KMC
72 L(2) | |||
| C658, C662, C657 | 3 | 100 uF | 160 | TH | 105C | Electrolytic | Rubycon | SH
51 | |||
| C611, C617 | 2 | 220 uF | 16 | TH | Electrolytic | ||||||
| C651 | 1 | 330 uF | 100 | TH | -55-+105C | Electrolytic | Rubycon | ||||
| C610, C616 | 2 | 470 uF | 16 | TH | (M) 105C | Electrolytic | Chemicon | ||||
| C652 | 1 | 470 uF | 35 | TH | (M) 105C | Electrolytic | |||||
| C605 | 1 | 220 uF | 400 | TH | 35 | 40 | 15 | 105C | Electrolytic | Nippon Chemicon | KM |
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