Hitachi CG2026S, Service Manual

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5
3. TUNER
Either a PLL or a VST tuner is used as a tuner.
UV1316 (VHF/UHF) is used as a PLL tuner. For only PALM/N, NTSC M applications UV1336 is used as the
PLL tuner. UV1315 (VHF/UHF) is used as a VST Tuner.
Channel coverage of UV1316:
%$1'
2))$,5&+$11(/6 &$%/(&+$11(/6
&+$11(/6 &+$11(/6
/RZ%DQG(WR&WR6WR6WR
0LG%DQG(WR(WR6WR6WR
+LJK%DQG(WR(WR6WR6WR
)5(48(1&<
5$1*(0+]
)5(48(1&<
5$1*(0+]
(1). Enough margin is available to tune down to 45.25 MHz.
(2). Enough margin is available to tune up to 863.25 MHz.
Noise Typical Max. Gain Min. Typical Max.
Low band : 5dB 9dB All channels : 38dB 44dB 52dB
Mid band : 5dB 9dB Gain Taper (of-air channels) : 8dB
High band : 6dB 9dB
Channel Coverage UV1336:
%$1'
&+$11(/6
/RZ%DQGWR'WR
0LG%DQG(WR33WR
+LJK%DQG444WRWR
)5(48(1&<
5$1*(0+]
Noise is typically 6dB for all channels. Gain is minimum 38dB and maximum 50dB for all channels.
Channel Coverage of UV1315:
%$1'
2))$,5&+$11(/6 &$%/(&+$11(/6
&+$11(/6 &+$11(/6
/RZ%DQG(WR&WR6WR6WR
0LG%DQG(WR(WR6WR6WR
+LJK%DQG(WR(WR6WR6WR
)5(48(1&<
5$1*(0+]
)5(48(1&<
5$1*(0+]
(1). Enough margin is available to tune down to 45.25 MHz.
(2). Enough margin is available to tune up to 863.25 MHz.
Noise Typ. Max. Gain Min. Typ. Max.
Low band 6dB 9dB All Channels 38dB 44dB 50dB
Mid band 6dB 10dB Gain Taper 8dB
High band 6dB 11dB (off-air channels)
4. DIGITAL TV SOUND PROCESSOR MSP34X0
The MSP 34x0D is designed to perform demodulation of FM or AM-Mono TV sound. Alternatively, two-carrier FM systems
according to the German or Korean terrestrial specs or the satellite specs can be processed with the MSP 34x0D. Digital
demodulation and decoding of NICAM-coded TV stereo sound, is done only by the MSP 3410. The MSP 34x0D offers a
powerful feature to calculate the carrier field strength which can be used for automatic standard detection (terrestrial) and
search algorithms (satellite).
5. SOUND OUTPUT STAGE TDA7266L/TDA7266
TDA7266L is used as the AF output amplifier for mono applications. It is supplied by +12VDC coming from a separate
winding in the SMPS transformer. An output power of 5.5W (THD=0.5%) can be delivered into an 8ohm load.
TDA7266 is used as the AF output amplifier for stereo applications. It is supplied by
+12VDC coming from a separate winding in the SMPS transformer. An output power of 2*5.5W (THD=0.5%) can be delivered
into an 8ohm load.