Toshiba 21E88, Service Manual

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SERVICE MANUAL
2). Features
MCU
 High speed 8-bit CPU (TLCS-870/X series)
 Instruction execution time: 0.5 s (at 8 MHz)
 (TMPA8801/8807CMBNG)
32-Kbytes ROM, 2-Kbytes RAM
(TMPA8801/8807CPBNG)
48-Kbytes ROM, 2-Kbytes RAM
(TMPA8801/8807CRBNG)
56-Kbytes ROM, 2-Kbytes RAM
(TMPA8801/8807CSBNG)
64-Kbytes ROM, 2-Kbytes RAM
 ROM correction
 12 I/O ports
 14-bit PWM output 1 ch for a voltage synthesizer
 7-bit PWM output 1 chan
 8-bit A/D converter 3 ch for a touch-key input
with key ON wake-up CIRCUIT
 Remote control signal preprocessor
 Two 16-bit internal timer/counter 2 ch
 Two 8-bit internal timer/counter 2 ch
 Time base timer, watchdog timer
 16 interrupt sources: external 5, internal 11
 IIC bus interface (multi-master)
 STOP and IDLE power saving modes
TV Processor
IF
 Integrated PIF VCO aligned automatically
 Negative demodulation PIF
 Multi-frequency SIF demodulator without
external Tank-coil
Video
 Integrated chroma traps
 Black stretch
 Y-gamma
Chroma
 Integrated chroma BPFs
 PAL/NTSC/SECAM demodulation
CCD Decoder
 Digital data slicer for NTSC
OSD
 Clock generation for OSD display
 Font ROM characters: 384 characters
 Characters display: 32 columns  12 lines
 Composition: 16  18 dots
 Size of character: 3 (line by line)
 Color of character: 8 (character by character)
 Display position: H 256/V 512 steps
 BOX function
 Fringing, smoothing, Italic, underline function
 Conform to CCD REGULATION
 Jitter elimination
RGB/Base-Band
 Integrated 1 H base-band delay line
 Base-band TINT control
 Internal OSD interface
 Half-tone and transparent for OSD
 External YCbCr interface for DVD
 RGB cut-off/drive controls by bus
 ABCL (ABL and ACL combined)
Sync.
 Integrated fH
×
 640 VCO
 DC coupled vert. ramp output (single)
EW correction with EHT input
(For
TMPA8807 Only)
AV Switch (For TMPA8801 Only)
 1 for video and 1 for audio (monaural)
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