Toshiba 32WH37G, Service Manual

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9
Pinning:
1. Non-inverting voltage input
2. Supply voltage LOW
3. Inverting voltage input
4. Ground, substrate
5. Black current measurement output
6. Supply voltage HIGH
7. Cathode transient voltage output
8. Cathode CD voltage output
9. Feedback voltage output
VERTICAL OUTPUT STAGE
TDA9379FA
The IC TDA9379FA is the vertical deflection booster circuit. Two supply voltages, +12V and –12V are needed to scan the
inputs VERT+ and VERT-, respectively. And a third supply voltage, +45V for the flyback limiting are needed. The vertical
deflection coil is connected in series between the output and feedback to the input.
Features:
n Power Amplifier
n Thermal Protection
n Output Current up to 2.6App
n Flyback Voltage up to 90V
n External Flyback Supply
Pinning:
1. Inverting Input
2. Supply Voltage
3. Flyback Supply
4. GND or Negative Supply
5. Output
6. Output Stage Supply
7. Non-inverting Input
TVTEXT CONTROLLER
(SDA5550M)
The SDA5550M is a single chip teletext decoder for decoding World System Teletext data as well as Video Program-
ming System (VPS), Program Delivery Control (PDC), and Wide Screen Signalling (WSS) data used for PAL plus
transmissions (Line 23). The device provides an integrated general-purpose, fully 8051-compatible Microcontroller with
television specific hardware features. Microcontroller has been enhanced to provide powerful features such as memory
banking, data pointers, and additional interrupts etc. The on-chip display unit for displaying Level 1.5 teletext data can
also be used for customer defined on screen displays. Internal XRAM consists of up to17 Kbytes. AK41 has the version
without internal ROM. This device can support external memory up to 1Mbyte ROM and RAM.TVTEXT Controller con-
tains a data slicer for VPS, WSS, PDC and TXT, an acceleration acquisition hardware module, a display generator for
Level 1.5 TXT and powerful On screen Display capabilities based on parallel attributes, and pixel oriented characters
(DRCS). The 8 bit Microcontroller operates at 360nsec cycle time (min). Controller with dedicated hardware does most of
the internal TXT acquisition processing, transfer data to/from external memory interface and receives/transmits data via
I
2
C-firmware user interface. SDA5550M is realized in 0.25 micron technology with 2.5V supply voltage and 3.3V I/O
compatible.
The IC produces the following input or output control signals; AGC_CON, MODE_SW, L / L’, PIP_MODS, PIP_SEL,
ON/OFF (stand-by), SC1..3_IN_AV (pin 8 information from 3 SCARTs), AFC, MUTE (to mute audio output IC), I2CEN.
Features:
n Genaral
- Feature selection via special function register
- Simultaneous reception of TXT, VPS, PDC and WSS (Line 23)
- Supply Voltage 2.5 and 3.3V
- P-MQFP100 Package
n Microcontroller
- Single external 6Mhz crystal, all necessary clocks are generated internally
- CPU speed selectable via special function registers
- Normal mode 33.33 MHz CPU clock, Power Save mode 8.33MHz
- 8 bit 8051 instruction set compatible CPU
- 360 ns minumum instruction cycle