Parker TS2151, Service Manual

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Working principle:
Power part:
The power adopts thick film integrate circuit STR-W6553 , which embedded power
MOSFET and controller. It usually works at quasi-resonance or Bottom-Skip quasi-resonance and
realizes the performance of high efficiency of switch power and low noise. Work at gap oscillation when
stand-by to reduce the power consumption. Small insulation packing(T0220-6L) can reduce the reality
area and make the power smaller and standard. The design is simpler because of the little peripheral
components.
N102 pin3 (STANDBY) output high level when standby, V503 b# is high level, and triode turn-on, V503
C# is low level. When the unit works normally, N102 pin3(STANDBY) output low level, V503 cut-off, B+
takes samples of RP502, V501 then sends to N502 to monitor B+ fluctuation, the samples will be
converted into current to adjust the power output.
Video and sound parts:
T
he super single IC R2J10161G8-AOOFP(N102) with I2C bus controlled processor
which includes IF, color decoder, 8-bits MCU, pre-video amplify, H/V deflection,
AV switch, audio processing, ect.. The main interfaces are: one AV IN, one S-VIDEO IN, YCbCr, one AV
OUTPUT.
The signal flow is below:
The antenna reception signal RF will be sent to tuner, via HF and mixing, output IF, via V111 after, it sent
to SAW Z101 filtering and gain better IF. Then it feed to main IC N102 (R2J10161G8-AOOFP) from 38#,
39# IF amplify, phase-lock loop VCO and synchronous detection, output from 34# as composite video
signal VIF-VIDEO. After filtering, VIF-VIDEO changes to VIDEO-TV. VIDEO-TV and Y component from
AV1/S, AV2 and YCbCr via NB01(4052BP)9#,10# AV/Y, AV1/AV2 (TV/AV) select, output VIDEO, it will be
sent to N102 form 32# again. C of S terminal is sent to N102 30#, component Cb, Cr is sent to N102
19#,20#, then video decoding and processing, it sent to the internal RGB interface matrix, pre-video
amplify, contrast, bright and blacking, output RGB form 51#,52#,53#. After N102 internal video switch
selecting, the video is sent to decoding and processing, it also output from 24# as AV OUT.
The main IC N102 has the H/V deflection internal. VDRV output from 11#, via N301(TDA8177)
amplifying to push the vertical deflection coil. HDRV output from 15#, via V301(ST1803DF) driving to
push the horizontal deflection coil. EW-OUT output form 25# via V303(2SC3852) driving then sent to the
horizontal deflection.
The IF signal is sent to N102 from 38# 39# demodulating TV audio L/R. L/R of AV1/S, AV2, YCbCr via
audio switch NB02(4052BP) selecting, it sent to N102 29#,43# switch selection and audio process
together with TV audio signal, then output L/R from 46# 48#, it sent to sound amplifier NV01(TDA7253)
amplifying to push the speaker; at the same time, the L/R from 46# 48# is also audio of AV OUT.
The unit is control by the MCU built in N102, it connects tuner and E2PROM through IIC bus line and
controls the whole unit working.