Specifications

Circuit description of CCM420 monitor Application Note
AN97032
Philips Semiconductors
32
XT301 Crystal 12MHz
Connectors
Number Type Remarks
J3 HEADER 3p
J301 HEADER 2p
J302 HEADER 2p
X1 STOCKO 3p remove middle pin
X2 STOCKO 4p
X201 STOCKO 3p
X202 STOCKO 3p
X203 STOCKO 3p
X204 STOCKO 3p
X205 STOCKO 3p
X301 STOCKO 14p
X302 STOCKO 4p
X303 STOCKO 8p
X304 STOCKO 4p
X305 STOCKO 6p
X306 STOCKO 12p
X307 STOCKO 4p
X401 STOCKO 7p remove middle pin
X402 STOCKO 3p remove middle pin
Heatsinks:
The areas of the heatsinks are:
• horizontal deflection: 140 cm
2
; R
th
≈ 4 K/W.
• vertical deflection: extruded heatsink with ≈60 cm
2
; R
th
≈ 3 K/W.
• EHT: 50 cm
2
; R
th
≈ 9 K/W.
• SMPS: 60 cm
2
; R
th
≈ 8 K/W.
Mounting studs for heatsinks:
The heatsinks for horizontal deflection, EHT and SMPS are mounted on the PCB via special mounting studs.
For each heatsink one of these studs is connected to the ground plane of the circuit to ensure the heatsink is
correctly grounded. The heatsink for the vertical deflection is mounted with screws. Again one of these screws
is connected to ground to define the heatsink’s potential.
Clips for device mounting on heatsinks.
Note
: the mains voltage is interrupted on the board between filter output and mains switch. This connection
must be made by two wires soldered between the appropriate points on the board. The reason for not imple-
menting this connection in the board lay-out is that it requires too much space.