TimHD
Well-known member
Note: I wonder if the admins could create a Repairs or Recaps forum so that we can collate and capture knowledge like the below before it is lost.
https://jbretro.wordpress.com/2019/07/10/m1296-recap/
The aim of this post is to create a reference online of capacitors used in the main and neck board of the Apple 12″ Macintosh Monitor (M1296). Attached is a spreadsheet of capacitor values that has been created by the writer and verified / checked for accuracy and show photos of the recap.
This monitor’s design has the front bezel match the curve and width of certain Macintosh computers, famously the LC line and also IICI. It is a fixed resolution 512 x 384 @ 60 Hz RGB monitor which used composite sync. Internally it is a Japanese design by Matsushita and uses a shadow mask CRT tube. It is not compatible with traditional analogue RGB video signals, even when fed clean C-SYNC.
I found the build quality to be strong and pleasing to repair. My monitor featured vertical collapse when turned on and was known to have little use from new, cosmetically perfect and from a single owner in Sydney, Australia.
Capacitor C418 was the failure point for me, along with rotted traces from heavy capacitor leakage. The main board was indeed wet and electrolyte pooling in the grooves of the case.
I chose to re-cap everything including the neck board as clearly I felt like a challenge. After repairing some traces and verifying my work, the monitor was tested as working ‘first go’. The image remains pristine – clear, converged well and bright.
PDF spreadsheet M1296 Repair Recap rev 2.xlsx (attached)
Apple 12″ Macintosh RGB Monitor M1296
Main board
uF
V
C401, C413, C502, C523
1
50
C416
22
25
C418
2200
6.3
C420, C519
220
25
C501, C526
47
50
C507, C520, C522
10
50
C512, C414
100
50
C517
100
25
C518
10
160
C521
82
160
C525
0.1
50
C908 (Comment: Negative Black)
220
450
C914
22
100
C915, C921
10
100
C919
330
180
C920, C417
2200
35
Neck board
uF
V
C203
1
50
C205
220
100
C206, (C517 from main board)
100
25
C2B4, C2G4, C2R4
2.2
50
C2R2,C2R1,C2G1,C2B1,C2G2,C2B2
47
25
C6B5, C6R5, C6G5, C207
1
160
C6R3, C6G3, C6B3
47
25
View attachment m1296-repair-recap-rev-2.xlsx.pdf
https://jbretro.wordpress.com/2019/07/10/m1296-recap/
The aim of this post is to create a reference online of capacitors used in the main and neck board of the Apple 12″ Macintosh Monitor (M1296). Attached is a spreadsheet of capacitor values that has been created by the writer and verified / checked for accuracy and show photos of the recap.
This monitor’s design has the front bezel match the curve and width of certain Macintosh computers, famously the LC line and also IICI. It is a fixed resolution 512 x 384 @ 60 Hz RGB monitor which used composite sync. Internally it is a Japanese design by Matsushita and uses a shadow mask CRT tube. It is not compatible with traditional analogue RGB video signals, even when fed clean C-SYNC.
I found the build quality to be strong and pleasing to repair. My monitor featured vertical collapse when turned on and was known to have little use from new, cosmetically perfect and from a single owner in Sydney, Australia.
Capacitor C418 was the failure point for me, along with rotted traces from heavy capacitor leakage. The main board was indeed wet and electrolyte pooling in the grooves of the case.
I chose to re-cap everything including the neck board as clearly I felt like a challenge. After repairing some traces and verifying my work, the monitor was tested as working ‘first go’. The image remains pristine – clear, converged well and bright.
PDF spreadsheet M1296 Repair Recap rev 2.xlsx (attached)
Apple 12″ Macintosh RGB Monitor M1296
Main board
uF
V
C401, C413, C502, C523
1
50
C416
22
25
C418
2200
6.3
C420, C519
220
25
C501, C526
47
50
C507, C520, C522
10
50
C512, C414
100
50
C517
100
25
C518
10
160
C521
82
160
C525
0.1
50
C908 (Comment: Negative Black)
220
450
C914
22
100
C915, C921
10
100
C919
330
180
C920, C417
2200
35
Neck board
uF
V
C203
1
50
C205
220
100
C206, (C517 from main board)
100
25
C2B4, C2G4, C2R4
2.2
50
C2R2,C2R1,C2G1,C2B1,C2G2,C2B2
47
25
C6B5, C6R5, C6G5, C207
1
160
C6R3, C6G3, C6B3
47
25
View attachment m1296-repair-recap-rev-2.xlsx.pdf
