Cv Board - Sony KV-13FS100 Product & Training Manual

System Control
All system control functions are performed by IC001 (OneChip). The main operating crystal is X001 (8MHz).
The following control functions are handled by IC001:
1) Remote commands (SIRSC) decoding
2) Main Converter Power Supply ON/OFF
3) Audio IC Input switching (commands ONLY)
4) Audio Muting and Volume Control
5) Video Input Switching (Performed Inside IC001)
6) Degauss ON/OFF
7) Tuner Control and Muting
Power Supply
The Standby Power Supply on the BA-6 is Energy Star® compliant. It supplies Standby 5V and Standby 3.3V to
keep various circuits on the A board active in Standby Mode. The Main Converter Power Supply supplies the rest
of the voltages (+135V, 14V, 9V, Main 3.3V) to the A board when an ON command is received..
Audio Section
The A board contains audio switching, processing (both of these functions are performed in IC400 for the
appropriate models) and amplifier circuits. The only circuit change on the A board between models is the Audio
processing IC. The KV-20FV100, and KV-24FV300 use IC400 (IC400 contains the Surround Sound processing
circuits); the KV-20FS100, KV-24FS100, and KV-13FS100/110 use IC401. All models use Audio Amplifier IC404.
Video Section
All Front/Rear Video input jacks and the Tuner are located on the A board. All video switching and processing is
performed by the ONE-Chip (IC001) on the A board. New on the BA-6 chassis is the addition of a component
(YUV) jack on the rear of the unit. Crystal X301 (6MHz) is used for NTSC signal (Composite) color signal
processing. If X301 is defective, the unit will still operate normally, except the picture will be in Black and White.
Deflection
The Horizontal, Vertical and Pincushion correction circuits are all on the A board. These circuits, along with the
Fly-back transformer, drive the CRT electron beam for picture scanning. The Horizontal output transistor is new
on the BA-6 chassis for better performance.
The Degauss circuit and relay is also on the A board.

CV Board

The CV board connects to the neck of the CRT via J1751. The circuits found on this PCB are the RGB amplifier
and buffer transistors and Output Drive IC (IC1751), N/S Amplifier and VM Drive circuit. The N/S amplifier and
coil are used to rotate the trace for good level horizontal scanning (Tilt Correction). The VM (Velocity Modulation)
circuit assists in sharpening the image when transitioning from Black to White and visa-versa.
7
2. Overall BA-6 Block