ARE DC LEVELS
CORRECT FOR THE RF
AMP? SEE TABLE 3
PLACE THE MAIN BOARD ON THE P637, POSITION B, AND
CONNECT IT TO THE RADIO BOARD VIA THE 4-WAY
EXTENSION LEAD. FIT A BATTERY. POWER UP THE
RADIO BOARD BY CONNECTING A LINK BETWEEN PINS 1
AND 4 ON SK2
REPLACE C314, INSERT AN ON-CHANNEL SIGNAL
MODULATED WITH 1kHz ON THE LIVE SIDE OF C327 AT A
LEVEL OF 1mV
IS I/P LEVEL >90dBm
FOR 12dB SINAD?
CHECK:
L304, R306, C320,
C325, C330, R308
CAN C314 BE ADJUSTED
TO GIVE A PEAK IN THE
O/P AT SK2 PIN 2 >20mV?
CHECK:
C317, C318, C319,
C336, C322, C323,
YES
NO
YES
NO
REMOVE SCREEN
AND C314
ARE DC LEVELS
CORRECT FOR TR304,
TR305, L307, XL301?
CHECK:
TR301, TR302 AND
ASSOCIATED
COMPONENTS
CHECK:
TR304, TR305 AND
ASSOCIATED
COMPONENTS
NO
YES
NO
YES
OSCILLATOR WORKING. REMOVE
C327. INJECT ON-CHANNEL SIGNAL
VIA 47p CERAMIC CAPACITOR AT
TR301 BASE
CHECK:
C317, C318, C319,
C336, C322, C323,
C329
RADIO BOARD OK. RECONNECT:
C327, SCREEN, AERIAL PARTS. RE-ALIGN
PAGER. RE-CASE. SEND CALL
E (RPR 553IS RADIO BOARD)
RPR 550IS Series
TM1188 Issue 1
Page 5 - 15
Figure 4: Fault-Finding Guide (Continued)
Содержание RPR 551IS
Страница 10: ...RPR 550IS Series TM1188 Issue 1 AL2 Oct 98 Page viii INTENTIONALLY BLANK...
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Страница 70: ...RPR 550IS Series Page 4 2 TM1188 Issue 1 INTENTIONALLY BLANK...
Страница 77: ...PSG 10444 1 RPR 550IS Series TM1188 Issue 1 Page 5 7 Figure 2 Case Removal...
Страница 103: ...PSG 10039 RPR 550IS Series TM1188 Issue 1 Page 5 33 Figure 18 Polystyrene Foam Block Dimensions in mm...
Страница 125: ...TM1188 Issue 1 AL2 Oct 98 Figure 4 RPR 552IS Radio Board Circuit Diagram Page 7 9 10...
Страница 126: ...TM1188 Issue 1 AL2 Oct 98 Figure 10 RPR 550IS Main Board Circuit Diagram Radio Page 7 21 22...
Страница 127: ...TM1188 Issue 1 AL2 Oct 98 Figure 11 RPR 550IS Main Board Circuit Diagram Radio Page 7 23 24...