Key-Cdc Board; Vu Meter Board - Philips FW-C798/21/37 Service Manual

KEY-CDC BOARD - COMPONENT LAYOUT
This assembly drawing shows a summary of all possible versions. For components used in a specific version see schematic diagram and respective parts list.
KEY-CDC BOARD - CHIP LAYOUT
This assembly drawing shows a summary of all possible versions. For components used in a specific version see schematic diagram and respective parts list.
VU METER BOARD - COMPONENT LAYOUT
This assembly drawing shows a summary of all possible versions.
For components used in a specific version see schematic diagram and respective parts list.
3139 113 3446 pt2 dd wk0116
5-4
VU METER BOARD - CHIP LAYOUT
This assembly drawing shows a summary of all possible versions.
For components used in a specific version see schematic diagram and respective parts list.
3139 113 3446 pt2 dd wk0116
KEY-CDC BOARD - CIRCUIT DIAGRAM
1800 A3 1802 B2
1801 B2 1803 B2
Note : Some values may varies, see respective parts list for correct value.
A
3139 113 3446 pt2 dd wk0116
B
GND-B GND-B
VU METER BOARD - CIRCUIT DIAGRAM
3139 113 3446 pt2 dd wk0116
1840 C1 2842 D2
2840 A2 2843 D3
2841 A2 2844 D4
Note : Some values may varies, see respective parts list for correct value.
# : Provision
A
B
1840
FE-BT-VK-N
1
2
C
3
4
5
6
To Front
D
5-4
1804 B1 2800 B1 3801 A1 3803 A1 3805 A2 3807 A2 6803 A1
1805 B1 3800 A1 3802 A2 3804 A1 3806 A2 6802 A1 6804 A2
1 2 3
FE-ST-VK-N
1800
1
GND
2
3
4
3806 3807
3803 3804 3805
5
220R
150R
560R 390R 270R
6
GND-B
GND-B GND-B GND-B GND-B
3139 118 54530...for 89610...3446 pt2 dd wk0116
1 2 3
3841 A2 3844 A3 3847 D4 3850 C4 4843 A2 6841 A3 6844 D3 7843 D3
3842 A2 3845 D2 3848 C3 3851 A3 5600 A4 6842 A4 7841 A2 7844 D3
3843 A2 3846 D3 3849 C3 4842 A2 6840 A1 6843 D4 7842 C3 7845 D4
1 2 3
# 4842
+5V6
Vu-backlight
4843
+Vu
3851 LB3333
7841
6840
180R
BC847B Gnd
6842
1N4148
3843 3844
1K 8K2
2840
5600
100p
Vu-meter
1 2
+5V6
+Vu
7842
BC857B
VUMeter
+5V6
Gnd
Bit0
Bit1
3845
7843 7844
BC847B BC847B
1K2
2842 2843
100p 100p
Gnd Gnd
3139 118 54530...for 89650...3446 pt2 dd wk0116
1 2 3
A
B
4
A
B
C
BC857B D
7845
2844
100p
Gnd
4