Hitachi TRK-5351E Service Manual page 3

1.
Tuner Section
Adjustment
Item
FM OSC.
(Covering)
TRK-5351E TRK-5351E
ADJUSTMENT
Measuring Instrument and Connection Genescope or
Messuring Input Terminal Output
Instrument Terminal
Turn T202 fully counterclockwise
e@ Genescope
(10.7 MHz)
@ FM signal
generator
(400 Hz 30%
mod.)
@ Oscilloscope
2. Tape Recorder Section
TeP101
(L103)
TP101
(thru FM dummy
antenna)
(Note 3)
TP201 Repeat steps (1) and (2)
(R211)
FM ANT
eVTVM
(Tracking)
Ferrite-core
antenna
(Note 4)
e@ Genescope
(465 kHz)
T151
TP202 T203 Note 5
(R212) T204
TP202 Repeat steps (1) and (2)
(212) [gma [esi [_ui6t
Repeat steps (1) and (2)
515 kHz
1650 kHz cT154
TP202 Repeat steps (1) and (2)
(R212) 600 kHz 600 kHz L152
Max.
1400 kHz | 1400kHz | CT153
Repeat steps (1) and (2)
FM dummy antenna
sw Osc.
(Covering) | @ AM signal
generator
(400 Hz 30%
mod.)
eVTVM
Ferrite-core
antenna
(Note 4)
SW ANT.
(Tracking)
MW OSC,
(Covering) | @ AM signal
generator
(400 Hz 30%
mod.)
eVTVM
Ferrite-core
antenna
(Note 4)
MW ANT,
(Tracking)
Note: Signal generator
1. Feed in a weak signal to TP102 from the genescope.
Adjust T101 and 1201 for maximum gain and the wave-
form indicated in Figure 5. If the center of the wave- ©
form cannot be lined up on the marker, adjust the right/
f :
left balance Adjust the genescope output so that
there is a little noise riding on the
2. Use the T202 core to form the S-curve shown in Figure 1203 and 7204 for maximum gain and the waveform of
6. Adjust the symmetry of A and B about point C for Figure 8.
linearity. Base line .
B
Se ane
Fig. 6 :
A 9 Adjust the genescope output so that
there is a little noise riding on the
leading edge. Fig. 8
3. FM dummy antenna shows Figure 7,
Lubricate one or two drops of oil to rotating point or
lubricate grease to sliding point. Lubricate the respective
parts listed once every 1000 hours or once a year under
normal conditions of use. Avoid oiling them excessively,
or rotation may become irregular because of oil splashes.
Perform the following adjustment after cleaning the head, pressure roller, and capstan with a head cleaning stick moisted
LUBRICATION
Spring resonance prevention Floil (GB-TS-1)
(10W-40)
section
Sonic slider oil
Mold and metal (#1600)
Metal and metal Hitasol (MO-138)
Mold and mold White grease
(FL-LUBE-A)
Sliding
section
INSPECTION OF MECHANISM
Playback
Pressure of pressure roller
Take-up torque
Supply reel back tension
Mold and metal
300 ~ 500 gr
40 ~ 70 gr-cm
Rewind torque
65 ~ 140 gr-cm
Fast forward torque
65 ~ 140 gr-cm