Philips
Hi-Fi Record player 22GA312-00R-00z-15z – circuit diagram, adjustments and part
numbers
1. In
position “stop” (SK4-On) the supply voltage must be -10v with regard to
chassis. Adjust with R647.
2. When
the pickup arm lies on the pickup arm support 81, with apparatus in “stop”
(SK4-ON position, the voltage across the LDR 9R405) SHOULD BE 2.5V. ADJUST WITH r465. The supply voltage should be -10v.
3. When
the stylus of the pickup head is at a distance of 60mm from the center of the
turntable, the voltage across the LDR 9R4050 should be 3.5v +/-0.2v. adjust with the locking screw M3x16 in
bracket 108. The supply voltage should
be -10v,
4. The
clearance between the film (above the LDR R106 should lie between 0.5 and 2mm. Adjust by slightly bending switch off bracket
106.
5. At
33 1/3 and 45r.p.m, the apparatus should have the correct speed. Adjust by setting R468 and R470 to central
position and with R469 and R471, adjust to the correct speed. Check with the stroboscope ring on the
turntable mat, or test record 4822 397 30019.
6. When
using record with a pitch of 2mm, the apparatus should switch off when the
stylus is at 60-55mm from the center of the turntable. Check with test record 4822397 30015. Adjust with T466 (apparatus in the 45r.p.m.
position). IMPORTANT: Incidence of light on the LDR from the outside
must be avoided.
Auxiliary tools
Test
record: 4822 397 30015
Test
record: 4822 397 30019
Wow/flutter
meter [Bruno Woelke Type ME104.
Fro
DGG test record:
DIN
45545 [3150 Hz] 33 1/3 RPM
DIN 44545 [3150Hz] 45RPM.
Schematic and PWB
Exploded view
Mechanical parts
